Tie rod ball head assembly of rubber spring structure

Abstract

The utility model relates to a tie rod ball head assembly of a rubber spring structure, and belongs to the technical field of automobile key parts. The tie rod ball head assembly of the rubber spring structure comprises a tie rod assembly body, a left tie rod ball head, a right tie rod ball head, a locking hoop, a locking bolt and a locking self-locking nut. A left tie rod ball head is mounted at one end of the tie rod assembly body in a threaded manner; a right tie rod ball head is mounted at the other end of the tie rod assembly body in a threaded manner; locking hoops are arranged on the outer sides of the two ends of the pull rod assembly body through locking bolts and locking self-locking nuts. The tie rod ball head assembly of the rubber spring structure solves the problems that an existing tie rod ball head assembly is tedious in machining technology, low in production efficiency, complex in machining procedure, long in delivery cycle, low in yield rate due to deformation of a heat treatment thin wall, small in elasticity modulus, short in service life and not suitable for a commercial vehicle platform. The vehicle operation maintenance cost and time are reduced; and the motorcade operation efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a tie rod ball head assembly with a rubber spring structure, belonging to the technical field of key automobile parts. Background Art

[0002] The tie rod ball assembly is an important part of the automobile steering system. It is mainly responsible for connecting the steering gear tie arm and the left arm of the steering knuckle to transmit the power of the steering gear to the steering knuckle. Secondly, the tie rod can also connect the left and right steering arms to synchronize the two wheels, thereby controlling the steering of the wheels. It can also adjust the toe to ensure the stability of the car when driving. The existing automobile tie rod ball head, such as the automobile tie rod ball head disclosed in the utility model patent with the authorization announcement number CN204610545U, can meet the needs of vehicle use to a certain extent, but it has the following problems:

[0003] First, the existing tie rod ball head has high requirements for the matching precision between the ball head pin and the matching upper and lower ball wrists of the ball seat liner, and there are problems such as complicated processing technology, low processing efficiency and high cost.

[0004] Second: The ball seat body, ball head pin, upper ball bowl and lower ball bowl of the existing tie rod ball head all need to be heat treated, and there is a risk of cracking. The deformation of the thin-walled upper ball bowl and lower ball bowl after heat treatment is difficult to control, and there is a risk of size correction after heat treatment. The improvement of the yield rate encounters a bottleneck, and there is a problem of long processing cycle affecting product delivery.

[0005] Third: The existing dust cover of the tie rod ball head lacks an effective waterproof structure and is affected by the climate environment. For example, in domestic east-west and north-south long-distance transportation, it may still be a cold and dry environment in the north, but it becomes a warm and humid environment like spring in the south. In areas with abundant rainfall, it is very easy for water vapor to enter the grease and affect the lubrication effect, causing the tie rod ball head to be unable to be used normally.

[0006] Fourth: The rubber spring structure of the existing tie rod ball head has a small space, and the elastic modulus of rubber itself is very low, so that it cannot reach the starting torque and swing torque of commercial vehicles (medium or heavy trucks) in working state, and can only be applied to passenger cars, and cannot be applied to commercial vehicles with relatively large loads (medium or heavy trucks).

[0007] Fifth: The existing tie rod ball head is designed to be maintainable. To achieve maintainability, there must be an oil groove design inside it. Vehicles often travel under harsh working conditions, and floating dust, rain, snow melting agent, mud and sand often cover the vehicle chassis, which may enter the grease through the vents and cause the grease to deteriorate. Therefore, the steering system must be maintained regularly, and visual inspections of the appearance and grease filling and replacement must be performed. This is not conducive to users, especially commercial vehicle users, to extend the maintenance cycle of the steering system, reduce the maintenance frequency, reduce the downtime caused by maintenance, and improve vehicle operating efficiency.

[0008] Therefore, it is necessary to develop a tie rod ball end assembly with a new hydrogenated nitrile rubber spring structure for medium and heavy commercial vehicles to solve the above problems of the existing tie rod ball end assembly. Summary of the invention

[0009] The purpose of the utility model is to provide a new type of rubber spring structure with high wear resistance, high ductility, good high and low temperature adaptability, excellent mineral oil compatibility, high temperature aging resistance, high pressure and heavy load, and hydrogenated nitrile rubber. The purpose is to solve the existing problems of the existing tie rod ball head assembly when applied to commercial vehicle platforms, such as cumbersome processing technology, low production efficiency, complex processing procedures, long delivery cycle, thin wall deformation and low yield rate due to heat treatment, poor sealing and inability to isolate water vapor, small elastic modulus and unsuitable for commercial vehicles, and maintainable design leading to high vehicle operation and maintenance costs and low operation efficiency.

[0010] The technical solution of the utility model is:

[0011] A tie rod ball head assembly with a rubber spring structure, comprising a tie rod assembly body, a left tie rod ball head, a right tie rod ball head, a locking clamp, a locking bolt and a locking self-locking nut; a left tie rod ball head is threadedly installed on one end of the tie rod assembly body; a right tie rod ball head is threadedly installed on the other end of the tie rod assembly body; locking clamps are installed on the outer sides of the ends of both ends of the tie rod assembly body through locking bolts and locking self-locking nuts; it is characterized in that: ball head pins are installed in the ball head shells of the right tie rod ball head and the left tie rod ball head; the lower end of the ball head pin extends to the bottom of the ball head shell, and a dust cover is installed on the ball head pin extending to the bottom; the upper part of the dust cover is clamped and connected to the ball head shell by a dustproof elastic clamp ring; the lower part of the dust cover is inserted and connected to the conical surface of the ball pin; a hydrogenated nitrile rubber spring is installed on the upper part of the spherical part of the ball pin, and the upper part of the hydrogenated nitrile rubber spring is sealed by a spin-riveted upper cover.

[0012] The neck of the ball stud is sleeved with a waterproof resin ring, and lithium complex soap-based extreme pressure grease is injected into the cavity between the waterproof resin ring and the dust cover.

[0013] The lower end of the ball pin is provided with a slotted nut and a split pin.

[0014] High-performance ball head lubricating grease is injected into the upper spherical part of the ball head pin and the ball head housing.

[0015] The hydrogenated nitrile rubber spring is of cylindrical structure; spherical arcs are respectively arranged at the edges of the inner two ends of the rubber spring; a plurality of oil storage holes are evenly arranged on the spherical arc that contacts and cooperates with the spherical part of the ball pin; the spherical arc at the other end is smooth, four vertical oil grooves are respectively arranged on the outer side of the rubber spring, and an annular oil storage groove is arranged in the middle position of the outer side.

[0016] The advantages of the utility model are:

[0017] The tie rod ball head assembly of the rubber spring structure has high wear resistance, high ductility, good high and low temperature adaptability, excellent mineral oil compatibility, high temperature aging resistance, high pressure and heavy load, and good compatibility with hydrogenated nitrile rubber springs. It solves the problems of the existing tie rod ball head assembly, such as cumbersome processing technology, low production efficiency, complex processing procedures, long delivery cycle, thin wall easy deformation and low yield rate during heat treatment, poor sealing and inability to isolate water vapor, small elastic modulus and short life, which are not suitable for commercial vehicle platforms, and reduces vehicle operation and maintenance costs and time, and improves fleet operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure in the middle AA direction;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the right tie rod ball head of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the hydrogenated nitrile rubber spring of the utility model;

[0022] Figure 5 This is a schematic diagram of the structure of the hydrogenated nitrile rubber spring of the utility model;

[0023] Figure 6 The utility model is a schematic diagram of the cross-sectional structure of the hydrogenated nitrile rubber spring.

[0024] In the figure: 1. tie rod assembly; 2. left tie rod ball head; 3. right tie rod ball head; 4. locking clamp; 5. locking bolt; 6. locking self-locking nut; 7. cotter pin; 8. slotted nut; 9. ball pin; 10. dust cover; 11. waterproof resin ring; 12. dustproof elastic clamp; 13. hydrogenated nitrile rubber spring; 14. upper cover; 15. vertical oil tank; 16. annular oil storage tank; 17. spherical arc; 18. oil storage hole. DETAILED DESCRIPTION

[0025] The tie rod ball head assembly of the rubber spring structure includes a tie rod assembly body 1, a left tie rod ball head 2, a right tie rod ball head 3, a locking clamp 4, a locking bolt 5 and a locking self-locking nut 6 (see the attached manual). Figure 1 ).

[0026] A left tie rod ball head 2 is threadedly mounted on one end of the tie rod assembly body 1; a right tie rod ball head 3 is threadedly mounted on the other end of the tie rod assembly body 1 (see the attached manual). Figure 1 ).

[0027] A ball pin 9 is installed in the ball head housing of the right tie rod ball head 3 and the left tie rod ball head 2; the ball and taper parts of the ball pin 9 are induction hardened, and no oil storage tank is provided.

[0028] The arc part of the ball head housing of the right tie rod ball head 3 and the left tie rod ball head 2 is induction hardened, and no oil storage tank is provided. In this way, the purpose of reducing the process of adding oil storage tanks can be achieved, and the wear amount can be significantly reduced and the service life can be extended.

[0029] The lower end of the ball pin 9 extends to the bottom of the ball head housing, and a dust cover 10 is mounted on the ball pin 9 extending to the bottom; the upper part of the dust cover 10 is clamped and connected to the ball head housing through a dustproof elastic clamp ring 12; the lower part of the dust cover 10 is inserted and connected to the conical surface of the ball pin 9.

[0030] A hydrogenated nitrile rubber spring 13 is installed on the upper part of the spherical part of the ball stud 9, and the upper part of the hydrogenated nitrile rubber spring 13 is sealed by spinning and riveting an upper cover 14. The upper cover 14 improves the oil resistance of the seal.

[0031] The elastic modulus of rubber is very low, and magnesium sulfate can only be added to the formula to increase the hardness to improve its compensation torque, but this will cause the rubber spring to have reduced elasticity, wear resistance and oil resistance, especially when the oil temperature reaches 100 degrees. Only hydrogenated nitrile rubber spring 13 is used. Although hydrogenated nitrile rubber contains a small amount of double bonds, its oxidation stability is 1000 times higher than that of ordinary nitrile rubber. The thermal degradation temperature is 30-40°C higher than that of unhydrogenated nitrile rubber, and the heat aging resistance is significantly improved, the compression permanent deformation is significantly reduced, and the ozone resistance is improved. Hydrogenated nitrile rubber also has good ozone resistance, weather aging resistance, chemical resistance, and good compression permanent deformation performance and anti-swelling performance. Hydrogenated nitrile rubber spring 13 also increases anti-aging, tearing resistance, wear resistance, moderate hardness, good rebound performance, and can fit well on the spherical surface during the rise or fall of the ball pin to compensate for the wear and deformation of the machine parts.

[0032] The reason for using hydrogenated nitrile rubber spring 13 to replace the existing upper and lower ball bowl design is that the upper and lower ball bowls have complicated processing procedures, low processing efficiency, and high processing matching accuracy requirements. More importantly, it is mainly to solve the problem that the upper and lower ball bowls are deformed after heat treatment, resulting in low yield rate and long processing cycle affecting product delivery.

[0033] The hydrogenated nitrile rubber spring 13 is cylindrical in structure; the inner edges of both ends of the hydrogenated nitrile rubber spring 13 are respectively provided with spherical arcs 17; the spherical arc 17 that contacts and cooperates with the spherical part of the ball pin 9 is evenly provided with a plurality of oil storage holes 18; the spherical arc 17 at the other end is smooth (see the attached manual Figure 4 , 5 and 6).

[0034] The purpose of such arrangement is that after the upper cover 14 is riveted and fixed, the smooth spherical arc 17 of the hydrogenated nitrile rubber spring 13 can form a precise interference with the plane of the end face of the upper cover 14, thereby forming a vacuum environment inside the ball head shell, isolating dust, mud, water and water vapor from entering the cavity from the riveting edge to cause aging of the hydrogenated nitrile rubber spring 13 and corrosion of the metal to reduce the service life, and playing a maintenance-free role.

[0035] Four vertical oil grooves 15 are respectively arranged on the outer side of the hydrogenated nitrile rubber spring 13, and an annular oil storage groove 16 is arranged in the middle position of the outer side. The purpose of arranging the hydrogenated nitrile rubber spring 13 in this way is that when the ball pin 9 swings, the grease in the upper cavity and the lower cavity of the hydrogenated nitrile rubber spring 13 in the inner cavity of the ball head shell are stirred by the extrusion of the upper end surface of the ball pin 9, so that the grease has good fluidity and plays the effect of fully lubricating the parts.

[0036] The outer sides of the ends of the pull rod assembly 1 are equipped with locking clamps 4 through locking bolts 5 and locking self-locking nuts 6. The neck of the ball pin 9 is covered with a waterproof resin ring 11, and 6-6.5g of lithium complex soap-based extreme pressure grease is injected into the cavity between the waterproof resin ring 11 and the dust cover 10. It maintains good mechanical stability throughout the operation period, effectively prevents the grease from being squeezed out due to changes in consistency, has excellent water-resistant ability, prevents grease loss caused by rain and over-watered roads, and has excellent corrosion resistance. Under any operating conditions, it protects parts from corrosion and rust.

[0037] The waterproof resin ring 11 can effectively support and fix the dust cover 10 on the cylindrical mating surface of the dust cover 10 with a ball pin of 96.5mm, so that the inner hole of the dust cover 10 is always smaller than the tight and sealed state, preventing the dust cover 10 from sinking and exposing gaps to affect the sealing, waterproof and dustproof effects.

[0038] The lower end of the ball pin 9 is equipped with a slotted nut 8 and a split pin 7. 2.8-3.3g of high-performance ball grease is injected into the upper spherical part of the ball pin 9 and the ball housing. High-performance ball grease is specially used in the working environment of rubber composite materials, especially suitable for lubrication between rubber and steel, has good compatibility with the main rubber sealing materials, good wear resistance to prevent long-term use without degradation, and very low temperature performance to adapt to the impact of extreme temperature conditions on product life in domestic east-west and north-south long-distance transportation.

[0039] The tie rod ball head assembly of the rubber spring structure has high wear resistance, high ductility, good high and low temperature adaptability, excellent mineral oil compatibility, high temperature aging resistance, high pressure and heavy load, and good compatibility with hydrogenated nitrile rubber spring 13. It solves the problems of the existing tie rod ball head assembly, such as cumbersome processing technology, low production efficiency, complex processing procedures, long delivery cycle, thin wall easy deformation and low yield rate during heat treatment, poor sealing and inability to isolate water vapor, small elastic modulus and short life, which are not suitable for commercial vehicle platforms, and reduces vehicle operation and maintenance costs and time, and improves fleet operation efficiency.

Claims

1. A tie rod ball head assembly with a rubber spring structure, comprising a tie rod assembly body (1), a left tie rod ball head (2), a right tie rod ball head (3), a locking clamp (4), a locking bolt (5) and a locking self-locking nut (6); one end of the tie rod assembly body (1) is threadedly mounted with the left tie rod ball head (2); the other end of the tie rod assembly body (1) is threadedly mounted with the right tie rod ball head (3); the outer sides of the ends of both ends of the tie rod assembly body (1) are equipped with locking clamps (4) through locking bolts (5) and locking self-locking nuts (6); the characteristics are: The ball head housings of the right tie rod ball head (3) and the left tie rod ball head (2) are both equipped with ball head pins (9); the lower end of the ball head pin (9) extends to the bottom of the ball head housing, and a dust cover (10) is sleeved on the ball head pin (9) extending to the bottom; the upper part of the dust cover (10) is clamped and connected to the ball head housing through a dustproof elastic clamp (12); the lower part of the dust cover (10) is inserted and connected to the conical surface of the ball head pin (9); a hydrogenated nitrile rubber spring (13) is installed on the upper part of the spherical part of the ball head pin (9), and the upper part of the hydrogenated nitrile rubber spring (13) is sealed by a spin-riveted upper cover (14).

2. The tie rod ball head assembly with a rubber spring structure according to claim 1, characterized in that: The neck of the ball stud (9) is sleeved with a waterproof resin ring (11), and lithium complex soap-based extreme pressure grease is injected into the cavity between the waterproof resin ring (11) and the dust cover (10).

3. The tie rod ball head assembly with a rubber spring structure according to claim 1, characterized in that: The lower end of the ball pin (9) is provided with a slotted nut (8) and a cotter pin (7).

4. The tie rod ball head assembly with a rubber spring structure according to claim 1, characterized in that: High-performance ball head lubricating grease is injected into the upper spherical part of the ball head pin (9) and the ball head housing.

5. The tie rod ball head assembly with a rubber spring structure according to claim 1, characterized in that: The hydrogenated nitrile rubber spring (13) is of cylindrical structure; spherical arcs (17) are respectively arranged at the edges of the inner two ends of the hydrogenated nitrile rubber spring (13); a plurality of oil storage holes (18) are evenly arranged on the spherical arc (17) that contacts and cooperates with the spherical part of the ball pin (9); the spherical arc (17) at the other end is smooth, and four vertical oil grooves (15) are respectively arranged on the outer side of the hydrogenated nitrile rubber spring (13), and an annular oil storage groove (16) is arranged in the middle position of the outer side.

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