High-rigidity lightweight double-fork-arm front lower control arm

Abstract

This utility model discloses a high-rigidity, lightweight double wishbone front lower control arm, specifically relating to the field of automotive suspension system technology. It includes a control arm body with multiple hollowed-out grooves on its surface. Two bushing assemblies are located on one side of the control arm body, and a ball joint assembly is fixedly mounted on the other side. A reinforcing mechanism is provided on the surface of the control arm body, including a fixed cavity fixedly located inside the control arm body at the connection points between the control arm body and the bushing and ball joint assemblies. Reinforcing ribs are fixedly mounted inside the fixed cavity. An annular reinforcing ring is fixedly mounted at the connection points between the control arm body and the bushing and ball joint assemblies, and several reinforcing ribs are evenly distributed on the surface of the annular reinforcing ring. This utility model achieves the core functions of lightweight load-bearing, precise guidance, and long-term protection through the synergistic effect of its components.

Description

Technical Field

[0001] This utility model relates to the field of automotive suspension system technology, and more specifically, to a high-rigidity, lightweight double wishbone front lower control arm. Background Technology

[0002] As the core load-bearing and guiding component of the front suspension, the performance of the double wishbone lower control arm directly affects the vehicle's handling, comfort, and safety. Currently, wishbone arms are typically manufactured using aluminum alloy forging and stamping with hole-making processes.

[0003] The existing manufacturing process is complex, requiring multiple steps in the stamping process to form the product. The cost of processing tooling is high, the product shape is complex, the dimensional accuracy of the stamped product is difficult to guarantee, and the life of the stamping mold is short, which increases the manufacturing cost.

[0004] A search revealed that Chinese patent CN222004891U discloses the fork arm of an automotive double wishbone suspension. The core components of this structure are all formed by stamping, requiring only welding assembly afterward. The manufacturing process is simple, eliminating complex processing steps and significantly reducing production complexity. Compared to stamped and perforated fork arms, the required tooling is simpler, saving on the design and manufacturing costs of specialized tooling and further simplifying the production process. Secondly, in terms of cost, compared to aluminum alloy casting fork arms, its cost is only half, a significant reduction. Compared to stamped and perforated fork arms, cost savings are also achieved due to simplified processes and tooling. Furthermore, due to the simple process and fewer processing steps, the fork arm can achieve higher hourly output, efficiently meeting the needs of mass production and adapting to large-scale production scenarios.

[0005] However, in actual use, although the structure simplifies production, it relies solely on low-carbon steel plates, resulting in low structural strength of its stamped parts. In particular, the connection nodes between the control arm and the bushing and ball joint lack specialized reinforcement design, making them prone to deformation due to stress concentration, which can lead to inaccurate wheel positioning and abnormal tire wear. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a high-rigidity and lightweight double wishbone front lower control arm to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A high-rigidity and lightweight double wishbone front lower control arm includes a control arm body, the surface of which is provided with multiple hollow slots, two bushing assemblies are provided on one side of the control arm body, a ball joint assembly is fixedly provided on the other side of the control arm body, and a reinforcing mechanism is provided on the surface of the control arm body.

[0009] The strengthening mechanism includes a fixed cavity fixedly opened inside the control arm body. The fixed cavity is located at the connection points between the control arm body and the bushing assembly and the ball head assembly at both ends. A reinforcing rib is fixedly installed inside the fixed cavity. An annular reinforcing ring is fixedly installed at the connection points between the control arm body and the bushing assembly and the ball head assembly. Several reinforcing ribs are evenly distributed in an annular pattern on the surface of the annular reinforcing ring.

[0010] The reinforcing ribs are honeycomb-shaped, and both the annular reinforcing ring and the reinforcing ribs are made of alloy steel. The reinforcing ribs and the annular reinforcing ring are integrally formed.

[0011] By adopting the above technical solution, the hollow groove of the control arm body can reduce weight while ensuring basic strength, and together with the reinforcement mechanism, it can achieve the dual advantages of "lightweight and high rigidity".

[0012] As a further description of the above technical solution: one end of the reinforcing rib is fixedly connected to the bushing assembly, the bushing assembly includes a hydraulic bushing, and the hydraulic bushing has multiple damping cavities inside, which are connected to each other through damping holes opened inside the hydraulic bushing.

[0013] The hydraulic bushing is filled with high-viscosity hydraulic oil, and a reinforcing frame is fixedly installed inside the hydraulic bushing. A rubber pad is fixedly installed on one side of the reinforcing frame.

[0014] By adopting the above technical solution, the multiple damping cavities inside the hydraulic bushing are connected through damping holes. With the help of high-viscosity hydraulic oil, it can adaptively buffer vibrations under different working conditions, reduce road impact transmission, improve driving smoothness, and take into account both buffering effect and structural reliability, thus adapting to the complex driving needs of vehicles.

[0015] As a further description of the above technical solution: the ball joint assembly includes a ball joint seat, a ball joint pin is rotatably fitted inside the ball joint seat, a dust cover is fixedly provided on the surface of the ball joint seat, and molybdenum disulfide is coated on the surface of the ball joint pin;

[0016] The inner wall of the dust cover is fixedly provided with a sealing layer, which is made of nitrile rubber. One end of the dust cover is fixed to the surface of the rod of the ball head pin by a sealing clamp.

[0017] The surface of the control arm body is fixedly provided with an anti-corrosion layer, which is made of nano-ceramic coating.

[0018] By adopting the above technical solution: the dust cover combined with the nitrile rubber sealing layer and the sealing clamp can completely isolate dust and impurities, avoid internal contamination of the ball head, and extend the service life of the ball head assembly.

[0019] The technical effects and advantages of this utility model are as follows:

[0020] 1. This utility model adopts a strengthening mechanism. From the perspective of structural strength, the fixed cavity is precisely laid out at the connection between the control arm body and the bushing assembly and ball head assembly. The internal honeycomb reinforcing ribs can maximize the dispersion of stress and avoid deformation caused by local stress concentration. The annular reinforcing ring is made of alloy steel and directly wraps the connection node. Together with the integrally formed reinforcing ribs, it forms a three-dimensional support structure, which greatly improves the torsional and bending resistance of the connection part. Moreover, the strengthening mechanism does not need to add too much weight. The honeycomb structure and the hollow groove complement each other. While strengthening the rigidity, it maintains the overall lightweight advantage of the control arm. In addition, the annular reinforcing ring and reinforcing ribs made of alloy steel are adapted to different load requirements and can be flexibly applied to different vehicle models, taking into account both performance and versatility, and extending the service life of the control arm.

[0021] 2. This utility model improves driving comfort, reliability, and durability simultaneously through optimized design of the bushing assembly, ball joint assembly, and anti-corrosion layer. In the bushing assembly, the multiple damping chambers of the hydraulic bushing are connected through damping holes, and the high-viscosity hydraulic oil inside can adaptively buffer vibrations under different working conditions. Combined with the reinforced frame and rubber pad, it ensures the load-bearing strength of the bushing and reduces the transmission of road impact. The reinforcing rib is fixedly connected to the bushing assembly, further enhancing the connection rigidity and preventing bushing displacement. Secondly, the molybdenum disulfide on the surface of the ball joint pin reduces friction noise. The dust cover, through the sealing clamp and nitrile rubber sealing layer, can completely isolate dust and impurities, extending the service life of the ball joint assembly. The nano-ceramic anti-corrosion layer on the surface of the control arm body can resist salt spray and rainwater corrosion, significantly reducing the risk of body corrosion and extending the overall service life. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the overall top sectional structure of this utility model.

[0024] Figure 3 This is a top view cross-sectional structural diagram of the bushing assembly of this utility model.

[0025] Figure 4 This is a side view sectional structural diagram of the bushing assembly of this utility model.

[0026] Figure 5 This is a cross-sectional structural diagram of the ball joint assembly of this utility model.

[0027] The attached figures are labeled as follows: 1. Control arm body; 2. Hollowed-out groove; 3. Bushing assembly; 4. Ball head assembly; 5. Fixed cavity; 6. Reinforcing rib; 7. Annular reinforcing ring; 8. Reinforcing rib; 9. Hydraulic bushing; 10. Damping cavity; 11. Damping hole; 12. High viscosity hydraulic oil; 13. Reinforcing frame; 14. Rubber pad; 15. Ball head seat; 16. Ball head pin; 17. Dust cover; 18. Sealing layer; 19. Sealing clamp; 20. Anti-corrosion layer. Detailed Implementation

[0028] 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.

[0029] The embodiments disclosed in this application are as follows: Figure 1-5 The high-rigidity and lightweight double fork front lower control arm includes a control arm body 1. The surface of the control arm body 1 is provided with multiple hollow grooves 2. Two bushing assemblies 3 are provided on one side of the control arm body 1. A ball head assembly 4 is fixedly provided on the other side of the control arm body 1. A reinforcing mechanism is provided on the surface of the control arm body 1.

[0030] The strengthening mechanism includes a fixed cavity 5 fixedly opened inside the control arm body 1. The fixed cavity 5 is located at the connection points between the control arm body 1 and the bushing assembly 3 and the ball head assembly 4 at both ends. A reinforcing rib 6 is fixedly installed inside the fixed cavity 5. An annular reinforcing ring 7 is fixedly installed at the connection points between the control arm body 1 and the bushing assembly 3 and the ball head assembly 4. Several reinforcing ribs 8 are evenly distributed in an annular pattern on the surface of the annular reinforcing ring 7.

[0031] The reinforcing rib 6 is set in a honeycomb shape, and both the annular reinforcing ring 7 and the reinforcing rib 8 are made of alloy steel. The reinforcing rib 8 and the annular reinforcing ring 7 are integrally formed.

[0032] Two bushing assemblies 3 are fixed to a preset mounting position on one side of the control arm body 1 by interference fit, and ball joint assembly 4 is installed on the other side to ensure that the central axis of the three is aligned with the suspension design parameters.

[0033] Because the fixed cavity 5 inside the control arm body 1 is pre-embedded with honeycomb reinforcing ribs 6, during assembly, it is welded and fixed to the connection part of the control arm body 1 by annular reinforcing ring 7. The reinforcing ribs 8 on the surface of the annular reinforcing ring 7 are simultaneously attached and fixed to the bushing assembly 3, forming a three-dimensional reinforced structure of fixed cavity 5, reinforcing ribs 6, annular reinforcing ring 7 and reinforcing ribs 8, which improves the rigidity of the connection part.

[0034] Reference Figure 2-3As shown, one end of the reinforcing rib 8 is fixedly connected to the bushing assembly 3. The bushing assembly 3 includes a hydraulic bushing 9. The hydraulic bushing 9 has multiple damping cavities 10 inside, and the multiple damping cavities 10 are connected to each other through damping holes 11 opened inside the hydraulic bushing 9.

[0035] The hydraulic bushing 9 is filled with high-viscosity hydraulic oil 12. A reinforcing frame 13 is fixedly installed inside the hydraulic bushing 9. A rubber pad 14 is fixedly installed on one side of the reinforcing frame 13.

[0036] When the load is transferred to the bushing assembly 3, the high-viscosity hydraulic oil 12 inside the hydraulic bushing 9 flows in multiple damping chambers 10 and generates damping force through the damping hole 11 to counteract the high-frequency vibration of the road surface. At the same time, the rubber pad 14 on the outside of the reinforcing frame 13 undergoes elastic deformation to absorb low-frequency impacts. The double buffering improves the ride comfort.

[0037] Furthermore, under conditions of rapid acceleration, emergency braking, or high-speed steering, the connection between the control arm body 1 and the bushing assembly 3 and ball joint assembly 4 experiences increased stress. The annular reinforcing ring 7 and the reinforcing rib 8 share the additional load, and the honeycomb reinforcing rib 6 disperses stress through the fixed cavity 5 to prevent elastic or plastic deformation at the connection, thus ensuring wheel positioning accuracy.

[0038] Reference Figure 4-5 As shown, the ball head assembly 4 includes a ball head seat 15, a ball head pin 16 is rotatably fitted inside the ball head seat 15, a dust cover 17 is fixedly provided on the surface of the ball head seat 15, and molybdenum disulfide is coated on the surface of the ball head pin 16.

[0039] A sealing layer 18 is fixedly provided on the inner wall of the dust cover 17. The sealing layer 18 is made of nitrile rubber. One end of the dust cover 17 is fixed to the surface of the rod of the ball head pin 16 by a sealing clamp 19.

[0040] A corrosion-resistant layer 20 is fixedly provided on the surface of the control arm body 1. The corrosion-resistant layer 20 is made of nano-ceramic coating.

[0041] During vehicle operation, the dust cover 17 of the ball joint assembly 4 is tightly fixed to the surface of the ball joint pin 16 via the sealing clamp 19. The sealing layer 18 on the inner wall is made of nitrile rubber, which prevents dust and mud from entering the ball joint seat 15. At the same time, the molybdenum disulfide coating on the surface of the ball joint pin 16 maintains a self-lubricating state, reducing wear and eliminating abnormal noise.

[0042] The anti-corrosion layer 20 on the surface of the control arm body 1 is made of nano-ceramic coating, which directly isolates corrosive media such as rainwater and salt spray, and prevents the base of the control arm body 1 from rusting. Combined with the anti-corrosion treatment of the metal parts of the bushing assembly 3 and the ball head assembly 4, it extends the overall service life and reduces the frequency of maintenance.

[0043] Working principle of this utility model:

[0044] This utility model is a high-rigidity and lightweight double wishbone front lower control arm. When using this device, the control arm body 1, made of lightweight material, is first fixed to the suspension assembly station. Multiple hollow grooves 2 on its surface have been pre-made with topology optimization. While reducing its own weight, it retains the load-bearing capacity of key areas and provides a basic framework for subsequent component assembly.

[0045] Then, the two bushing assemblies 3 are fixed to the preset mounting position on one side of the control arm body 1 by interference fit, and the ball joint assembly 4 is installed on the other side to ensure that the central axis of the three is aligned with the suspension design parameters.

[0046] Because the fixed cavity 5 inside the control arm body 1 is pre-embedded with honeycomb reinforcing ribs 6, during assembly, it is welded and fixed to the connection part of the control arm body 1 by annular reinforcing ring 7. The reinforcing ribs 8 on the surface of the annular reinforcing ring 7 are simultaneously attached and fixed to the bushing assembly 3, forming a three-dimensional reinforced structure of fixed cavity 5, reinforcing ribs 6, annular reinforcing ring 7 and reinforcing ribs 8, which improves the rigidity of the connection part.

[0047] When the vehicle is moving, the impact force of the road surface is transmitted to the ball joint assembly 4 through the wheel. The ball joint pin 16 rotates flexibly in the ball joint seat 15, converting the longitudinal and lateral loads into linear forces along the control arm body 1. At this time, the hollow groove 2 of the control arm body 1 can disperse local stress and avoid stress concentration leading to deformation.

[0048] When the load is transferred to the bushing assembly 3, the high-viscosity hydraulic oil 12 inside the hydraulic bushing 9 flows in multiple damping chambers 10 and generates damping force through the damping hole 11 to counteract the high-frequency vibration of the road surface. At the same time, the rubber pad 14 on the outside of the reinforcing frame 13 undergoes elastic deformation to absorb low-frequency impacts. The double buffering improves the ride comfort.

[0049] Furthermore, under conditions of rapid acceleration, emergency braking, or high-speed steering, the connection between the control arm body 1 and the bushing assembly 3 and ball head assembly 4 is subjected to increased stress. The annular reinforcing ring 7 and the reinforcing rib 8 jointly bear the additional load, and the honeycomb reinforcing rib 6 disperses the stress through the fixed cavity 5 to prevent elastic or plastic deformation at the connection and ensure wheel positioning accuracy.

[0050] Secondly, during vehicle operation, the dust cover 17 of the ball joint assembly 4 is tightly fixed to the surface of the ball joint pin 16 via the sealing clamp 19. The sealing layer 18 on the inner wall is made of nitrile rubber, which prevents dust and mud from entering the ball joint seat 15. At the same time, the molybdenum disulfide coated on the surface of the ball joint pin 16 maintains a self-lubricating state, reduces wear, and eliminates abnormal noise.

[0051] The anti-corrosion layer 20 on the surface of the control arm body 1 is made of nano-ceramic coating, which directly isolates corrosive media such as rainwater and salt spray, and prevents the base of the control arm body 1 from rusting. Combined with the anti-corrosion treatment of the metal parts of the bushing assembly 3 and the ball head assembly 4, it extends the overall service life and reduces the frequency of maintenance.

[0052] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-rigidity, lightweight double wishbone front lower control arm, comprising a control arm body (1), characterized in that: The surface of the control arm body (1) is provided with multiple hollow grooves (2), two bushing assemblies (3) are provided on one side of the control arm body (1), a ball head assembly (4) is fixedly provided on the other side of the control arm body (1), and a reinforcing mechanism is provided on the surface of the control arm body (1). The strengthening mechanism includes a fixed cavity (5) fixedly opened inside the control arm body (1). The fixed cavity (5) is located at the connection points of the control arm body (1) with the bushing assembly (3) and the ball head assembly (4) at both ends. A reinforcing rib (6) is fixedly provided inside the fixed cavity (5). An annular reinforcing ring (7) is fixedly provided at the connection points of the control arm body (1) with the bushing assembly (3) and the ball head assembly (4). A number of reinforcing ribs (8) are evenly distributed in an annular pattern on the surface of the annular reinforcing ring (7).

2. The high-rigidity, lightweight double wishbone front lower control arm according to claim 1, characterized in that: The reinforcing rib (6) is honeycomb shaped, and the annular reinforcing ring (7) and the reinforcing rib (8) are both made of alloy steel. The reinforcing rib (8) and the annular reinforcing ring (7) are integrally formed.

3. The high-rigidity, lightweight double wishbone front lower control arm according to claim 2, characterized in that: One end of the reinforcing rib (8) is fixedly connected to the bushing assembly (3). The bushing assembly (3) includes a hydraulic bushing (9). The hydraulic bushing (9) has multiple damping cavities (10) inside. The multiple damping cavities (10) are connected to each other through damping holes (11) inside the hydraulic bushing (9). The hydraulic bushing (9) is filled with high-viscosity hydraulic oil (12), and a reinforcing skeleton (13) is fixedly installed inside the hydraulic bushing (9). A rubber pad (14) is fixedly installed on one side of the reinforcing skeleton (13).

4. The high-rigidity, lightweight double wishbone front lower control arm according to claim 1, characterized in that: The ball head assembly (4) includes a ball head seat (15), a ball head pin (16) is rotatably fitted inside the ball head seat (15), a dust cover (17) is fixedly provided on the surface of the ball head seat (15), and molybdenum disulfide is coated on the surface of the ball head pin (16).

5. The high-rigidity, lightweight double wishbone front lower control arm according to claim 4, characterized in that: The inner wall of the dust cover (17) is fixedly provided with a sealing layer (18), which is made of nitrile rubber. One end of the dust cover (17) is fixed to the surface of the rod of the ball head pin (16) by a sealing clamp (19).

6. The high-rigidity, lightweight double wishbone front lower control arm according to claim 1, characterized in that: The surface of the control arm body (1) is fixedly provided with an anti-corrosion layer (20), which is made of nano-ceramic coating.

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