CN204020981U - A car tie rod assembly - Google Patents

Abstract

The utility model discloses an automobile pull rod assembly, including pull rod, ball round pin and the ball seat structure that is used for supporting the ball round pin, the ball round pin includes bulb and ball round pin pole, be equipped with in the pull rod and be used for holding the ball seat structure with the cavity that holds of bulb. The utility model discloses an automobile pull rod assembly, through the cavity that holds of bulb and the ball seat structure that holds the ball round pin in the pull rod setting, the pull rod is monolithic structure, ball round pin direct mount is on the pull rod, thereby can improve the bearing strength of pull rod assembly, the structure of pull rod assembly is simpler, can simplify production technology, and the reduction in production cost, and each part of pull rod assembly can be changed alone, only need change the part of damage when breaking down, need not to change the assembly, use cost is reduced, the steering stability of big torsion heavy machinery has been guaranteed, ensure to turn to operation safe and reliable.

Description

A car tie rod assembly

technical field

The utility model belongs to the technical field of automobiles, in particular, the utility model relates to an automobile tie rod assembly.

Background technique

The existing automobile steering rod is connected with the ball pin, and one end of the pull rod is provided with a spherical shell, and the ball head of the ball pin is inserted into the ball socket of the spherical shell to form a ball joint structure. Since the spherical shell, the tie rod and the ball head are assembled in separate parts, the formed tie rod assembly has the problem of low bearing strength, complicated process and structure, and high production cost. In addition, in the ball socket of the ball shell, the ball seat is provided with a support enclosing ball seat to support the ball head, and the ball pin will have an impact on the ball seat due to external force, which may easily cause damage to the ball seat.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art. For this reason, the utility model provides an automobile tie rod assembly, and the purpose is to improve the bearing strength.

In order to achieve the above object, the technical solution adopted by the utility model is: an automobile tie rod assembly, including a tie rod, a ball pin and a ball seat structure for supporting the ball pin, the ball pin includes a ball head and a ball pin rod, and the tie rod An accommodating chamber for accommodating the ball seat structure and the ball head is provided inside.

The accommodating chamber is a cylindrical cavity.

One end of the pull rod is provided with a first opening communicating with the accommodating chamber, and a screw plug is provided at the first opening.

The side wall of the pull rod is provided with a second opening communicating with the accommodating chamber, and the ball pin rod protrudes from the second opening.

The ball seat structure includes two ball bowls, guide rods and springs for clamping the ball head, wherein one ball bowl, guide rod and spring are located on one side of the ball head, and the other ball bowl and the screw plug are located on the side of the ball head. On the other side of the head, the spring is sandwiched between the guide rod and the bowl adjacent to the guide rod.

The two bowls are coaxial with the guide rod and the plug.

The ball bowl includes a cone part in contact with the ball head and a cylinder part for inserting into the spring, the cone part is provided with a mating surface in contact with the spherical surface of the ball head, and the cylinder part and the cone part The two are connected and coaxial, and the end of the spring is against the cone.

The screw plug is provided with a concave hole for inserting the cylindrical part of the ball bowl.

A protective cover is sheathed on the pull rod.

In the automobile tie rod assembly of the utility model, by arranging the accommodation chamber of the ball head and the ball seat structure for accommodating the ball pin in the tie rod, the tie rod is an integral structure, and the ball pin is directly installed on the tie rod, so that the tie rod assembly can be improved. The bearing strength of the tie rod assembly is simpler, the production process can be simplified, and the production cost can be reduced. Moreover, each part of the tie rod assembly can be replaced separately. When a failure occurs, only the damaged part needs to be replaced without replacing the assembly, which reduces The cost of use ensures the steering stability of large-torque heavy machinery (such as large tractors, pavers, heavy trucks, etc.), and ensures safe and reliable steering operations.

Description of drawings

This manual includes the following drawings, the contents shown are:

Fig. 1 is a sectional view of the utility model automobile tie rod assembly;

Fig. 2 is the top view of pull rod;

Fig. 3 is a sectional view of the pull rod;

Fig. 4 is a sectional view of the ball bowl;

Fig. 5 is a cross-sectional view of the guide rod;

Fig. 6 is the sectional view of screw plug;

Fig. 7 is a sectional view of the rubber cover;

Fig. 8 is a schematic diagram of a longitudinal section of the rubber cover;

Figure 9 is a top view of the protective cover;

Figure 10 is a sectional view of the protective cover;

Fig. 11 is the assembly drawing of tie rod and ball bowl, guide rod and screw plug etc.;

Fig. 12 is the structural representation of ball pin;

Labeled in the figure:

1. Spring; 2. Nozzle;

3. Pull rod; 31. Accommodating chamber; 32. First liquid inlet chamber; 33. Liquid inlet hole; 34. First opening; 35. Second opening; 36. Large diameter hole; 37. Small diameter hole; 38. Limit hole; 39, pin hole;

4, ball pin; 41, ball head; 42, ball pin rod;

5. Guide rod; 51. Rod body; 52. Flange; 53. Second liquid inlet chamber;

6. Ball bowl; 61. Cone part; 62. Cylinder part; 63. Third liquid inlet chamber; 64. Step surface; 65. Fitting surface; 66. Conical surface; 67. Arc surface;

7, screw plug; 71, concave hole; 72, cross groove;

8, rubber cover; 81, ferrule; 82, closed cover; 83, the third opening;

9. Protective cover; 91. The fourth opening;

10. Cotter pin.

Detailed ways

Next, with reference to the accompanying drawings, through the description of the embodiments, the specific implementation of the present utility model will be further described in detail, the purpose is to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solutions of the present utility model , and contribute to its implementation.

As shown in Figures 1 to 12, the utility model is an automobile tie rod assembly, including a tie rod 3, a ball pin 4 and a ball seat structure for supporting the ball pin 4, and the ball pin 4 includes a ball head 41 and a ball pin rod 42 , The ball head 41 is installed on the end of the ball pin rod 42, and the two are coaxial. The tie rod 3 of the automobile tie rod assembly is provided with an accommodating chamber 31 for accommodating the ball seat structure and the ball head 41, that is, the ball head 41 of the ball pin 4 is inserted into the accommodating chamber 31 provided in the tie rod 3 and connected with the ball seat structure. connect. Compared with the prior art, the pull rod 3 does not need to be provided with a spherical shell for inserting the ball head 41 of the ball pin 4, and the pull rod 3 is an integral rod. The tie rod 3 is an integral structure, and the ball pin 4 is directly installed on the tie rod 3, so that the bearing strength of the tie rod assembly can be improved. The structure of the tie rod assembly is simpler, which can simplify the production process and reduce the production cost. On heavy machinery, such as large tractors, paving machines, heavy trucks, etc., it can ensure the stability of steering and ensure safe and reliable steering operation.

In the automobile tie rod assembly of the utility model, the tie rod 3 has various forms. In this embodiment, the tie rod 3 is a cylindrical long straight rod, and the accommodating chamber 31 is a cylindrical cavity located at the center of the tie rod 3 . In order to facilitate the installation of the ball seat structure, as shown in Figure 3, one end surface of the pull rod 3 is provided with a first opening 34 communicating with the accommodation chamber 31, the first opening 34 is circular, when the ball seat structure is installed, The ball seat structure can be inserted into the accommodation chamber 31 through the first opening 34 . In order to be able to close the first opening 34, as shown in Figure 1, a screw plug 7 is provided at the first opening 34, the screw plug 7 is inserted into the accommodating chamber 31 and is threadedly connected with the pull rod 3, correspondingly in the screw plug The outer wall of 7 is provided with external threads, and the inner wall of the accommodation chamber 31 is provided with internal threads.

As shown in Figure 1, Figure 2 and Figure 3, a second opening 35 communicating with the accommodation chamber 31 is provided on the side wall of the pull rod 3, the ball head 41 of the ball pin 4 is located in the accommodation chamber 31, and the ball pin A small part of the rod 42 is also inserted into the accommodating chamber 31 , and the rest protrudes outward through the second opening 35 .

The ball seat structure cooperates with the ball pin 4 to provide support for the ball pin 4 and ensure that the ball pin 4 can swing within a set angle range. As preferably, as shown in Figure 1, the ball seat structure includes two ball bowls 6 clamping the ball head 41, guide rod 5 and spring 1, wherein one ball bowl 6, guide rod 5 and spring 1 are located at the center of the ball head 41. On one side, another ball bowl 6 and screw plug 7 are located on the other side of the ball head 41, and the spring 1 is clamped between the guide rod 5 and the ball cup 6 adjacent to the guide rod 5, that is, in the accommodation chamber of the tie rod 3 Inside 31, guide rod 5, spring 1, ball bowl 6, ball head 41, ball bowl 6 and screw plug 7 are arranged in sequence along the axial direction. The guide rod 5 is in contact with the inner wall of the accommodating chamber 31, the spring 1 is a helical spring, and the spring 1 exerts an axial thrust on the ball bowl 6 adjacent to it, and the screw plug 7 blocks the other ball bowl 6. Under the action, it can ensure that the two ball bowls 6 can clamp the ball head 41 .

The above-mentioned ball seat structure changes the ball joint structure of the tie rod assembly, the spring 1 can be compressed and stretched, and maintains a consistent tightness for a long time, reducing the impact damage of the ball pin 4 to the ball bowl 6 due to external force, reducing The wear and tear caused by the ball head 41 to the ball bowl 6, and the ball bowl 6 is floating, when the ball pin 4 swings, it can push the ball bowl 6 to move axially in the accommodation chamber 31, thereby increasing the lateral swing angle of the ball pin 4 and lateral tension.

Preferably, as shown in FIG. 4 , the ball bowl 6 includes a cone portion 61 in contact with the ball head 41 and a cylinder portion 62 for inserting into the spring 1 . The cone portion 61 is in the shape of a truncated cone, and the cylinder portion 62 is cylindrical. The outer diameter of the cylinder portion 62 is smaller than the diameter of the large diameter end of the cone portion 61. The cylinder portion 62 and the cone portion 61 are coaxial, and the cylinder The portion 62 is fixedly connected to the large-diameter end of the cone portion 61 , so that a stepped surface 64 is formed on the cone portion 61 , and the end of the spring 1 abuts against the stepped surface 64 . The cone portion 61 ensures that the ball pin 4 has a larger swing angle. The cone portion 61 is also provided with a conical surface 66, an arc surface 67 and a mating surface 65 in contact with the spherical surface of the ball head 41. The mating surface 65 is The spherical surface formed concavely at the small-diameter end of the cone portion 61 , and the mating surface 65 is attached to the spherical surface of the ball head 41 . The small-diameter end of the conical surface 66 is connected to the edge of the mating surface 65 , the large-diameter end is connected to one edge of the arcuate surface 67 , and the other end of the arcuate surface 67 is connected to the edge of the stepped surface 64 . The arc surface 67 makes the large-diameter end edge of the cone portion 61 a circular arc transition, and is a radially convex structure. The maximum diameter of the arc surface 67 is approximately equal to the diameter of the receiving chamber 31, and the arc surface 67 is in contact with the inner wall surface of the housing chamber 31 . When the spring 1 pushes the ball bowl 6 to move, the arc surface 67 of the ball bowl 6 remains in contact with the inner wall surface of the accommodation chamber 31, which can make the axial positioning of the spring 1 more reliable, and the spring 1 is in the accommodation chamber 31. It does not bend and tilt, improves the guiding performance of the spring 1, and ensures better axial force of the spring 1.

The structure of the two ball bowls 6 of the ball seat structure is the same, as preferably, as shown in Figure 6, a concave hole 71 is provided on the inner end surface of the screw plug 7 to allow the cylindrical part 62 of the other ball bowl 6 to be inserted. , the concave hole 71 is a circular hole extending axially at the center of the inner end surface of the screw plug 7, the diameter of the concave hole 71 is slightly larger than the diameter of the cylindrical portion 62 of the ball bowl 6, and the depth of the concave hole 71 is slightly larger than The length of the cylindrical portion 62 ensures that the cylindrical portion 62 can be completely inserted into the concave hole 71 . The other end surface of the screw plug 7 is provided with a cross groove 72, which is convenient for using a tool to screw the screw plug 7 into the accommodation chamber 31 to connect with the pull rod 3, and the cross groove 72 extends to the outer circumferential surface of the screw plug 7, An opening is thereby formed on the outer peripheral surface of the screw plug 7 .

As preferably, as shown in Figure 5, the guide rod 5 includes a cylindrical rod body 51 and a disc-shaped flange 52, the flange 52 is fixedly connected with the rod body 51 and both are coaxial, the outer diameter of the flange 52 The outer diameter of the rod body 51 is smaller than the outer diameter of the flange 52 and equal to the outer diameter of the cylindrical portion 62 of the ball bowl 6 , so as to ensure that it can be inserted into the spring 1 . The spring 1 is sleeved on the rod body 51 , one end of the spring 1 abuts against the flange 52 , and the other end abuts against the cone portion 61 of the ball bowl 6 .

As shown in Figure 2 and Figure 3, the position of the second opening 35 on the pull rod 3 is provided with the end of the first opening 34 near the pull rod 3, the second opening 35 has a certain length, and the second opening 35 is formed by a large-diameter hole 36 , a small diameter hole 37 and a limit hole 38, the axes of the large diameter hole 36 and the small diameter hole 37 are parallel and perpendicular to the axis of the tie rod 3, and the axes of the large diameter hole 36 and the small diameter hole 37 are at the same axis as the tie rod 3 in plane. The large-diameter hole 36 and the small-diameter hole 37 are circular holes running through the side wall of the pull rod 3, the diameter of the large-diameter hole 36 is greater than the diameter of the small-diameter hole 37, and the small-diameter hole 37 is a semicircular hole, and the large-diameter hole 36 is roughly quartered. of three round holes. The limiting hole 38 is located between the large-diameter hole 36 and the small-diameter hole 37. The limiting hole 38 is a rectangular hole, and the two ends are respectively connected with the edges of the large-diameter hole 36 and the small-diameter hole 37, and the width of the limiting hole 38 is the same as that of the small-diameter hole. 37 are equal in diameter. The large-diameter hole 36 is closest to the end of the tie rod 3 , and the large-diameter hole 36 is used for inserting the ball head 41 of the ball pin 4 into the accommodating chamber 31 , so the diameter of the large-diameter hole 36 must be at least equal to the diameter of the ball head 41 . After the ball head 41 is inserted into the accommodating chamber 31, it will move to the position corresponding to the limit hole 38, that is, between the two ball bowls 6, and the diameter of the end of the ball pin rod 42 connected to the ball head 41 is smaller than the limit hole. The width of the hole 38 ensures that the ball pin 4 can swing. Large-diameter holes 36 and small-diameter holes 37 are distributed on both sides of the ball pin 4 to ensure that the ball pin 4 has a larger swing angle.

As shown in FIG. 1 and FIG. 3 , a first liquid inlet chamber 32 for storing lubricating grease and a liquid inlet hole 33 communicating with the first liquid inlet chamber 32 are also provided inside the pull rod 3 . The first liquid inlet chamber 32 is a cylindrical chamber communicated with the accommodation chamber 31, the first liquid inlet chamber 32 is coaxial with the accommodation chamber 31, and the diameter of the first liquid inlet chamber 32 is smaller than the accommodation chamber 31, and the length of the first liquid inlet chamber 32 is shorter than the length of the accommodating chamber 31. The liquid inlet hole 33 is a circular hole extending radially on the side wall of the tie rod 3 , and the position of the liquid inlet hole 33 is close to the end of the first liquid inlet chamber 32 away from the accommodating chamber 31 . A grease nipple 2 is installed at the liquid inlet 33, and the grease nozzle 2 is inserted into the liquid inlet 33 and fixedly connected with the pull rod 3. Grease can be injected into the first liquid inlet chamber 32 through the grease nozzle 2 to provide lubrication for the internal parts of the pull rod 3.

In order to ensure that the lubricating grease entering the first liquid inlet chamber 32 can flow to the ball head 41 and the ball bowl 6, as shown in Figure 5, a second liquid inlet chamber 53 is provided inside the guide rod 5, and the second liquid inlet chamber The chamber 53 is a cylindrical cavity extending axially from the center of one end surface of the guide rod 5 to the other end surface. The second liquid inlet chamber 53 is coaxial with the first liquid inlet chamber 32 and communicated with each other. As shown in FIG. 4 , a third liquid inlet chamber 63 is provided inside the ball bowl 6 , and the third liquid inlet chamber 63 extends axially from the center of the end face of the cylindrical portion 62 of the ball bowl 6 to the mating surface. The cylindrical cavity at 65, the third liquid inlet chamber 63 is coaxial with the second liquid inlet chamber 53. Due to the distance between the guide rod 5 and the adjacent ball bowl 6, the lubricating grease flowing out from the second liquid inlet chamber 53 will first flow into the accommodating chamber 31, forming the guide rod 5, the ball bowl 6 and the tie rod 3. Lubrication is provided between them, the grease in the accommodation chamber 31 will flow into the third liquid inlet chamber 63, and the grease flowing out from the third liquid inlet chamber 63 on the ball bowl 6 adjacent to the guide rod 5 will be Lubrication is provided between the ball bowl 6 and the ball head 41 . For the ball bowl 6 on the other side of the ball head 41 , grease will also flow into the third liquid inlet chamber 63 on the ball bowl 6 to provide lubrication between the ball bowl 6 , the ball head 41 and the screw plug 7 .

The automobile tie rod assembly is provided with the above-mentioned internal lubricating oil circuit, which ensures the synchronous lubrication of the ball pin 4 and the ball bowl 6 and other components at any time, and ensures that all components in the accommodation chamber 31 can be fully lubricated, thereby reducing wear and prolonging the service life. Lifespan, advanced than traditional butter lubrication, can reduce manual maintenance.

As preferably, a protective cover 9 is also sleeved on the pull rod 3, the structure of the protective cover 9 is shown in Figure 9 and Figure 10, the protective cover 9 is a cylindrical member made of cold-rolled plate, the thickness is relatively thin, and the protective cover 9 is set on the pull rod 3 at the position corresponding to the second opening 35, and the inner diameter of the protective cover 9 is equal to the outer diameter of the pull rod 3, so that the protective cover 9 can be tightly sleeved on the pull rod 3. An elliptical fourth opening 91 is provided at the position corresponding to the second opening 35 on the side wall of the protective cover 9, and the ball pin rod 42 of the ball pin 4 passes through the second opening 35 and the fourth opening 91 in sequence and then extends outward. out. The length directions of the fourth opening 91 and the second opening 35 are parallel, and the length of the fourth opening 91 is substantially equal to the length of the second opening 35 , so as to avoid interference between the protective cover 9 and the ball pin 4 .

As preferably, as shown in Figure 1, a rubber cover 8 is also sleeved on the pull rod 3, the structure of the rubber cover 8 is shown in Figure 7 and Figure 8, the rubber cover 8 is made of nitrile rubber material, its Comprising a U-shaped ferrule 81 and a closing cover 82, the closing cover 82 is a member connected with the ferrule 81 at the side opening of the ferrule 81, the closing cover 82 closes the side opening of the ferrule 81, and the closing cover 82 The shape of the cover is rectangular. After the protective cover 9 is put on the pull rod 3, the rubber cover 8 is placed on the protective cover 9, specifically, the ferrule 81 is put on the protective cover 9, and the inner peripheral surface of the ferrule 81 is attached to the outer surface of the protective cover 9. Together, the closure cover 82 is located on the side of the tie rod 3 . A third opening 83 is provided at a position corresponding to the fourth opening 91 on the side wall of the closure cover 82, and the ball pin rod 42 of the ball pin 4 passes through the second opening 35, the fourth opening 91 and the third opening 83 in sequence to the rear. stick out.

The rubber cover 8 has a dust-proof effect, which prevents impurities such as external dust from entering the inside of the pull rod 3 and improves the service life of the pull rod assembly.

In order to avoid the movement of the rubber cover 8, as shown in Figure 1, the rubber cover 8 is fixed on the pull rod 3 by setting a cotter pin 10, and the end of the pull rod 3 is provided with a pin hole 39 that runs through the pull rod 3 in the radial direction. The ferrule 81 is also provided with holes, and after the cotter pin 10 passes through the hole on the ferrule 81 and the pin hole 39 on the pull rod 3 , the rubber cover 8 can be fixed on the pull rod 3 . In addition, the pin hole 39 on the pull rod 3 is opposite to the opening formed by the cross groove 72 on the outer peripheral surface of the screw plug 7, and the opening groove can pass through one of the grooves in the cross groove 72 at the end of the screw plug 7 to avoid contact with the cross groove 72. When the screw plug 7 interferes, the screw plug 7 can also be fixed to prevent the screw plug 7 from falling off from the pull rod 3 .

The automobile tie rod assembly of the utility model adopts the above-mentioned structure. In addition to having high load-bearing strength, each part of the tie rod assembly can be replaced separately. It can reduce the cost of use, ensure the steering stability of heavy-torque heavy machinery, and ensure safe and reliable steering operation.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Apparently, the specific implementation of the present invention is not limited by the above methods. As long as the various insubstantial improvements made by adopting the method concept and technical solution of the present utility model; within the scope of protection.

Claims (9)

1. an automobile pull rod assembly, comprises pull bar, ball pin and the ball socket structure for supporting ball pin, and ball pin comprises bulb and ball pin bar, it is characterized in that: be provided with the accommodating chamber for holding described ball socket structure and described bulb in described pull bar.

2. automobile pull rod assembly according to claim 1, is characterized in that: described accommodating chamber is columniform cavity.

3. automobile pull rod assembly according to claim 1 and 2, is characterized in that: one end of described pull bar is provided with the first opening be communicated with described accommodating chamber, and is provided with plug screw at the first opening part.

4. automobile pull rod assembly according to claim 3, is characterized in that: the sidewall of described pull bar is provided with the second opening be communicated with described accommodating chamber, and described ball pin bar stretches out from the second opening.

5. automobile pull rod assembly according to claim 4, it is characterized in that: described ball socket structure comprises two the clamping ball bowls of described bulbs, guide rod and springs, one of them ball bowl and guide rod and spring are positioned at the side of bulb, another ball bowl and described plug screw are positioned at the opposite side of bulb, and spring clip is between guide rod and the ball bowl adjacent with guide rod.

6. automobile pull rod assembly according to claim 5, is characterized in that: two described ball bowls and described guide rod and described plug screw coaxial.

7. automobile pull rod assembly according to claim 6, it is characterized in that: described ball bowl comprises the cone portion that contacts with described bulb and for inserting the trunk portion in described spring, cone portion is provided with the fitting surface with the sphere-contact of bulb, trunk portion is connected with cone portion and both are coaxial, and the end of spring is against in cone portion.

8. automobile pull rod assembly according to claim 7, is characterized in that: described plug screw is provided with the shrinkage pool allowing the trunk portion of described ball bowl insert.

9. automobile pull rod assembly according to claim 8, is characterized in that: described pull bar is arranged with protective case.