Automobile control arm with high NVH performance

Abstract

The utility model relates to a kind of automobile control arm with high NVH performance, including front lower control arm body, hydraulic bushing assembly, ball head assembly, front bushing support assembly piece and shock absorber bushing, the front lower control arm body is L-shaped, the front lower control arm body one end is installed with hydraulic bushing assembly, the other end is installed with ball head assembly, the bending end of the front lower control arm body is installed with front bushing support assembly piece, the front lower control arm body is embedded with the shock absorber bushing being arranged longitudinally in one end close to ball head assembly.The utility model has the characteristics such as reducing the deformation amount generated when automobile control arm works, avoiding the loosening phenomenon generated between bushing and front lower control arm body, reducing the occurrence of abnormal sound, improving the NVH performance of product.

Description

Technical Field

[0001] This utility model relates to the field of control arm technology, and in particular to an automotive control arm with high NVH performance. Background Technology

[0002] NVH performance is an important indicator for measuring vehicle quality and comfort. It is a comprehensive indicator of automobile manufacturing quality, involving three aspects: noise, vibration, and acoustic roughness (i.e., subjective discomfort caused by sound and vibration). It has a direct impact on driving comfort, component lifespan, and overall vehicle quality, and about one-third of vehicle failures are related to it. NVH of the suspension control arm is a key and challenging aspect in the development of automotive suspension products. Especially with the rapid development of China's electric vehicle industry, the quality of automotive NVH performance has received much attention. Therefore, finding the appropriate methods to address abnormal noises, deformation, and loosening of the suspension control arm is crucial. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an automotive control arm with high NVH performance, which solves the problems of abnormal noise, deformation and loosening of some existing suspension front lower control arms.

[0004] The technical solution adopted by this utility model to solve its technical problem is: to provide an automotive control arm with high NVH performance, including a front lower control arm body, a hydraulic bushing assembly, a ball joint assembly, a front bushing bracket assembly and a shock absorber bushing. The front lower control arm body is L-shaped. A hydraulic bushing assembly is installed on one end of the front lower control arm body and a ball joint assembly is installed on the other end. A front bushing bracket assembly is installed at the bent end of the front lower control arm body. A longitudinally arranged shock absorber bushing is embedded in the end of the front lower control arm body near the ball joint assembly.

[0005] The hydraulic bushing assembly includes a hydraulic bushing and a hydraulic bushing bracket. An external threaded docking post is provided on one end of the front lower control arm body that docks with the hydraulic bushing assembly. The hydraulic bushing and the external threaded docking post form a threaded match. P80 lubricant is applied to the outer ring of the external threaded docking post. A hydraulic bushing bracket is fitted onto the outer ring of the hydraulic bushing.

[0006] The ball joint assembly includes a ball pin, a dust cover, a ball pin bracket, and a locking cover. A ball pin is installed in the middle of the ball pin bracket, penetrating the ball pin bracket. A ball cup is installed at the lower end of the ball pin. A locking cover is installed between the upper side of the ball cup and the lower side of the ball pin bracket. A dust cover is installed on the upper middle part of the ball pin bracket. A concave lip structure is provided on the upper side of the dust cover, and grease is applied to the inside of the lip structure.

[0007] In this technical solution, hydraulic bushing assemblies, ball joint assemblies, front bushing bracket assemblies, and shock absorber bushings are installed on the front lower control arm body to reduce vibrations generated during operation, thereby reducing abnormal noise. At the same time, by setting external threaded docking posts to connect with the hydraulic bushings, the unstable pressing force caused by batch differences between the front lower control arm body and the hydraulic bushings can be improved, increasing the fault tolerance of both. P80 lubricant is applied to the external threaded docking posts to further improve the stability between the front lower control arm body and the hydraulic bushings. In addition, a lip structure and grease are set to prevent scratching and abnormal noise caused by deformation of the dust cover.

[0008] As a supplement to this technical solution, a spherical washer is installed on the upper end of the dust cover, and a ball pin locking nut connected to the upper end of the ball pin is installed on the spherical washer. A retaining ring is snapped onto the lower end of the dust cover.

[0009] In this technical solution, the tightness of the connection between the dust cover and the ball pin locking nut is improved by installing a ball washer, the ball pin locking nut is added to facilitate docking with the ball pin bracket, and a retaining ring is added to fix the lower side of the dust cover.

[0010] As a supplement to this technical solution, the grease is in the form of twelve dots, evenly distributed at the bottom of the lip structure. The twelve evenly distributed dots of grease are used to effectively solve the problem of scratching noise of the dust cover caused by the large spacing of the lubricating oil.

[0011] As a supplement to this technical solution, the front bushing bracket assembly includes a front bushing, a front bushing bracket, a front bushing bracket bolt, and hexagonal nuts. The front bushing is embedded and press-fitted into the front lower control arm body. The front bushing bracket has a U-shaped structure. The front bushing is disposed within the concave structure of the front bushing bracket. The two ends of the front bushing bracket are fitted with the two ends of the front bushing. A front bushing bracket bolt passing through the front bushing and the front bushing bracket is installed on the front bushing bracket. Hexagonal nuts are installed at both ends of the front bushing bracket bolt.

[0012] In this technical solution, a front bushing is provided to facilitate docking with the front lower control arm body. A front bushing bracket bolt is installed to facilitate docking between the front bushing and the front bushing bracket. Hexagonal nuts are installed to fix the two ends of the front bushing bracket bolt.

[0013] As a supplement to this technical solution, release grooves are provided on both ends of the front bushing, and silicone lithium grease is applied to the release grooves. By providing release grooves, the contact area between the front bushing and the front bushing bracket is reduced. At the same time, by filling with silicone lithium grease, abnormal noise caused by low temperature in the rubber material is avoided.

[0014] Beneficial Effects: This utility model relates to an automotive control arm with high NVH performance. By installing a hydraulic bushing assembly, a ball joint assembly, a front bushing bracket assembly, and a shock absorber bushing on the front lower control arm body, the vibration generated during the operation of the front lower control arm body is reduced, thereby reducing abnormal noise. At the same time, by setting an external threaded docking post to connect with the hydraulic bushing, it can improve the instability of the pressing force caused by batch differences between the front lower control arm body and the hydraulic bushing, and increase the fault tolerance of both. In addition, applying P80 lubricant to the external threaded docking post can further improve the stability between the front lower control arm body and the hydraulic bushing. Furthermore, by setting a lip structure and grease, it can prevent scratching and abnormal noise caused by the deformation of the dust cover. It has the characteristics of reducing the deformation of the automotive control arm during operation, preventing loosening between the bushing and the front lower control arm body, reducing the occurrence of abnormal noise, and improving the NVH performance of the product. Attached Figure Description

[0015] Figure 1 This is a structural view of the present invention;

[0016] Figure 2 This is a top view of the present invention;

[0017] Figure 3 This is a side view of the rear positioning platform described in this utility model;

[0018] Figure 4 This is a structural view of the front positioning platform described in this utility model;

[0019] Figure 5 This is a structural view of the front positioning pressure rod described in this utility model.

[0020] Illustration: 1. Base platform, 2. Product positioning platform, 3. Distance go / no-go gauge, 4. Double no-go gauge placement platform, 5. Handle structure, 11. Front positioning platform, 21. Rear positioning platform, 22. Positioning post, 23. Clamp fixing post, 31. Clamp rod mounting bracket, 32. Positioning handle, 33. Clamp rod, 34. Rear pressure rod, 35. Side positioning post, 36. Positioning pin, 37. Pressure rod fixing post, 38. Pressure rod mounting post, 39. Pressure rod mounting bracket, 41. Positioning pressure rod, 42. Positioning abutment, 43. Front positioning pressure rod, 44. Through guide post, 45. Pressing head, 46. Limit seat, 311. Limit ring, 312. Adjusting head. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0022] The embodiments of this utility model relate to an automotive control arm with high NVH performance, such as... Figure 1 — Figure 5 As shown, it includes a front lower control arm body 1, a hydraulic bushing assembly 2, a ball joint assembly 3, a front bushing bracket assembly 4, and a shock absorber bushing 5. The front lower control arm body 1 is L-shaped. The hydraulic bushing assembly 2 is installed on one end of the front lower control arm body 1, and the ball joint assembly 3 is installed on the other end. The front bushing bracket assembly 4 is installed at the bent end of the front lower control arm body 1. The shock absorber bushing 5, which is arranged longitudinally, is embedded in the end of the front lower control arm body 1 near the ball joint assembly 3.

[0023] The hydraulic bushing assembly 2 includes a hydraulic bushing 21 and a hydraulic bushing bracket 22. The front lower control arm body 1 and the hydraulic bushing assembly 2 are connected at one end with an external threaded docking post 11. The hydraulic bushing 21 and the external threaded docking post 11 form a threaded match. P80 lubricant 23 is applied to the outer ring of the external threaded docking post 11. The hydraulic bushing bracket 22 is sleeved on the outer ring of the hydraulic bushing 21.

[0024] The ball joint assembly 3 includes a ball pin 31, a dust cover 34, a ball pin bracket 38, and a locking cover 33. The ball pin 31 is installed in the middle of the ball pin bracket 38, and a ball cup 32 is installed at the lower end of the ball pin 31. A locking cover 33 is installed between the upper side of the ball cup 32 and the lower side of the ball pin bracket 38. A dust cover 34 is installed on the upper middle part of the ball pin bracket 38. A concave lip structure 312 is provided on the upper side of the dust cover 34, and grease 311 is applied inside the lip structure 312.

[0025] In this technical solution, hydraulic bushing assembly 2, ball joint assembly 3, front bushing bracket assembly 4, and shock absorber bushing 5 are installed on the front lower control arm body 1 to reduce the vibration generated during the operation of the front lower control arm body 1, thereby reducing the occurrence of abnormal noise. At the same time, by setting an external threaded docking post 11 to dock with the hydraulic bushing 21, it can be used to improve the unstable pressing force caused by batch differences between the front lower control arm body 1 and the hydraulic bushing 21, and increase the fault tolerance of both. Meanwhile, P80 lubricant 23 is applied to the external threaded docking post 11 to further improve the stability between the front lower control arm body 1 and the hydraulic bushing 21. At the same time, the lip structure 312 and grease 311 are set to prevent scratching and abnormal noise when the dust cover 34 is deformed.

[0026] As a supplement to this technical solution, a spherical washer 36 is installed on the upper end of the dust cover 34, and a ball pin locking nut 39 connected to the upper end of the ball pin 31 is installed on the spherical washer 36. A retaining ring 35 is snapped onto the lower end of the dust cover 34.

[0027] In this technical solution, the connection between the dust cover 34 and the ball pin locking nut 39 is improved by installing a ball washer 36, the ball pin locking nut 39 is added to facilitate docking with the ball pin bracket 38, and the retaining ring 35 is added to fix the lower side of the dust cover 34.

[0028] As a supplement to this technical solution, the grease 311 is dotted, with a total of twelve, evenly distributed at the bottom of the lip structure 312. The twelve evenly distributed dotted grease 311 are used to effectively solve the problem of dust cover scraping noise caused by the large spacing of the lubricating oil.

[0029] As a supplement to this technical solution, the front bushing bracket assembly 4 includes a front bushing 41, a front bushing bracket 42, a front bushing bracket bolt 43, and a hexagonal nut 44. The front bushing 41 is embedded and press-fitted into the front lower control arm body 1. The front bushing bracket 42 has a U-shaped structure. The front bushing 41 is disposed in the concave structure of the front bushing bracket 42. The two ends of the front bushing bracket 42 are fitted with the two ends of the front bushing 41. The front bushing bracket 42 is equipped with a front bushing bracket bolt 43 that passes through the front bushing 41 and the front bushing bracket 42. Both ends of the front bushing bracket bolt 43 are equipped with hexagonal nuts 44.

[0030] In this technical solution, the front bushing 41 is set to facilitate docking with the front lower control arm body 1, the front bushing bracket bolt 43 is installed to facilitate docking between the front bushing 41 and the front bushing bracket 42, and the two ends of the front bushing bracket bolt 43 are fixed by installing hexagonal nuts 44.

[0031] As a supplement to this technical solution, release grooves 45 are provided on both ends of the front bushing 41. Silicone lithium grease 46 is applied to the release grooves 45. By providing release grooves 45, the contact area between the front bushing 41 and the front bushing bracket 42 is reduced. At the same time, by filling with silicone lithium grease 46, abnormal noise caused by low temperature in the rubber material is avoided.

[0032] Example

[0033] The pressing force between the front lower control arm body 1 and the hydraulic bushing 21 is unstable due to batch differences in the front lower control arm body 1 and the hydraulic bushing 21. By machining the front lower control arm body 1 into an external threaded mating post 11 to ensure appropriate thread pitch and depth, the instability of the pressing force caused by batch differences in the body and bushing can be significantly improved, and the fault tolerance of both can be increased.

[0034] The abnormal noise problem caused by the small gap between the front lower control arm body 1 and the front bushing 41 after assembly is due to the low temperature hardening characteristic of rubber itself in low temperature environment. With a small gap, boundary contact extrusion noise is easy to occur. By ensuring an appropriate gap between the front lower control arm body 1 and the front bushing 41, applying silicone lithium grease 46, and optimizing the bushing structure to increase the release groove 45 to reduce the contact area, the low temperature abnormal noise characteristics caused by the rubber itself can be completely solved.

[0035] The front lower control arm body 1 is mostly made of forged aluminum 6082-T6 material with a yield strength Rp0.2≥310Mpa and a tensile strength ≥340Mpa. Because electric vehicles have greater requirements for acceleration and handling performance compared to traditional fuel vehicles, the body may deform under extreme conditions. By selecting forged aluminum 6110A-T6 material with a yield strength Rp0.2≥370Mpa and a tensile strength ≥390Mpa, the unsprung weight of the car is reduced while the mechanical properties of the material are improved, which significantly improves the handling of the new energy sports car.

[0036] The front lower control arm body 1 requires the upper lip end face of the dust cover 34 to be coated with oil, but the uniformity of the oil coating or the spacing between the oil coating points is too large, which causes the dust cover 34 to scrape and make abnormal noise when the car turns. By coating oil evenly at 12 points, the scraping and abnormal noise of the dust cover 34 caused by the large spacing of the lubricating oil can be effectively solved.

Claims

1. A vehicle control arm with high NVH performance, characterized in that: The device includes a front lower control arm body (1), a hydraulic bushing assembly (2), a ball joint assembly (3), a front bushing bracket assembly (4), and a shock absorber bushing (5). The front lower control arm body (1) is L-shaped. The hydraulic bushing assembly (2) is installed on one end of the front lower control arm body (1), and the ball joint assembly (3) is installed on the other end. The front bushing bracket assembly (4) is installed at the bent end of the front lower control arm body (1). A longitudinally arranged shock absorber bushing (5) is embedded in the end of the front lower control arm body (1) near the ball joint assembly (3). The hydraulic bushing assembly (2) includes a hydraulic bushing (21) and a hydraulic bushing bracket (22). The front lower control arm body (1) and the hydraulic bushing assembly (2) are connected at one end with an external threaded docking post (11). The hydraulic bushing (21) and the external threaded docking post (11) are threadedly matched. P80 lubricant (23) is applied to the outer ring of the external threaded docking post (11). The hydraulic bushing bracket (22) is sleeved on the outer ring of the hydraulic bushing (21). The ball joint assembly (3) includes a ball pin (31), a dust cover (34), a ball pin bracket (38), and a locking cover (33). The ball pin bracket (38) has a ball pin (31) that passes through it. The lower end of the ball pin (31) has a ball cup (32). The upper side of the ball cup (32) and the lower side of the ball pin bracket (38) are connected by a locking cover (33). The upper middle part of the ball pin bracket (38) has a dust cover (34). The upper side of the dust cover (34) has a concave lip structure (312). The lip structure (312) is coated with grease (311).

2. The automotive control arm with high NVH performance according to claim 1, characterized in that: A spherical washer (36) is installed on the upper end of the dust cover (34), and a ball pin locking nut (39) connected to the upper end of the ball pin (31) is installed on the spherical washer (36). A retaining ring (35) is snapped onto the lower end of the dust cover (34).

3. The automotive control arm with high NVH performance according to claim 1, characterized in that: The grease (311) is dotted, with a total of twelve dots, evenly distributed at the bottom of the lip structure (312).

4. The automotive control arm with high NVH performance according to claim 1, characterized in that: The front bushing bracket assembly (4) includes a front bushing (41), a front bushing bracket (42), a front bushing bracket bolt (43), and a hexagonal nut (44). The front bushing (41) is embedded and press-fitted into the front lower control arm body (1). The front bushing bracket (42) has a U-shaped structure. The front bushing (41) is set in the concave structure of the front bushing bracket (42). The two ends of the front bushing bracket (42) are fitted with the two ends of the front bushing (41). The front bushing bracket (42) is equipped with a front bushing bracket bolt (43) that passes through the front bushing (41) and the front bushing bracket (42). Both ends of the front bushing bracket bolt (43) are equipped with hexagonal nuts (44).

5. A vehicle control arm with high NVH performance according to claim 4, characterized in that: The front bushing (41) is provided with release grooves (45) at both ends, and the release grooves (45) are coated with silicone lithium grease (46).

Images