Blocking seat type outer tie rod spherical hinge structure

Abstract

The utility model provides a plug seat type outer pull rod spherical hinge structure, which belongs to the field of automobile spherical hinge structure design and comprises a ball pin body, a ball pin seat, a ball pin sleeve, a plug seat and an outer pull rod body, the ball pin sleeve and the outer pull rod body are integrally formed, the plug seat and the ball pin seat are both arranged in the ball pin sleeve, the plug seat is located at the bottom of the ball pin seat, and the outer pull rod body is arranged in the outer pull rod body. The ball pin body is arranged in the ball pin seat, the plug seat is an annular seat with a hollow middle part, the inner diameter of the plug seat is smaller than the outer diameter of the ball pin seat, and the outer diameter of the plug seat is larger than the diameter of the ball pin seat. According to the outer tie rod spherical hinge structure, an original solid plate body seat is replaced with the annular seat with the hollow middle, the overall weight of the outer tie rod spherical hinge structure is reduced, cost is reduced, and the design requirement for light weight of existing automobile parts is met; and meanwhile, compared with a non-blocking-seat spherical hinge structure, the pressing-out force of the spherical hinge structure is not weakened, and the design requirement for light weight of automobile parts is met on the premise that the performance of the spherical hinge structure is not weakened.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile ball joint structure design, in particular to a blocking seat type outer pull rod ball joint structure. Background Art

[0002] Lightweighting of automotive parts can save fuel economy and economic costs, and is the current development trend of automotive parts. The outer tie rod ball joint structure is used in the automotive steering system. Compared with the suspension system ball joint, it bears less force from the bouncing of the wheel and frame. That is, as a force transmission mechanism of the steering system, it is mainly affected by radial force, and the axial force of the outer tie rod is smaller. Based on this, starting from the first principles of the function of the outer tie rod ball joint, it is urgent to design a blocking type outer tie rod ball joint structure that can meet the functional requirements of the outer tie rod while meeting the lightweight design. Utility Model Content

[0003] The purpose of the utility model is to provide a blocking seat type outer tie rod ball joint structure, which utilizes a hollow annular seat in the middle to replace the original solid plate seat, thereby reducing the overall weight of the outer tie rod ball joint structure, reducing costs, and meeting the current design requirements for lightweight automotive parts.

[0004] The embodiment of the utility model is realized through the following technical scheme: a plug-seat type external tie rod ball joint structure, comprising a ball pin body, a ball pin seat, a ball pin sleeve, a plug seat and an external tie rod body, the ball pin sleeve and the external tie rod body are integrally formed, the plug seat and the ball pin seat are both arranged in the ball pin sleeve and the plug seat is located at the bottom of the ball pin seat, the ball pin body is arranged in the ball pin seat, the plug seat is an annular seat with a hollow middle part, the inner diameter of the plug seat is smaller than the outer diameter of the ball pin seat, and the outer diameter of the plug seat is larger than the diameter of the ball pin seat.

[0005] Furthermore, the plugging seat is riveted and closed through the rivet seam of the ball pin sleeve.

[0006] Furthermore, the bottom of the ball and pin seat is sealed.

[0007] Furthermore, the ball pin seat is made of polyoxymethylene material, and the plug seat is made of low-carbon steel material.

[0008] Furthermore, the inner wall of the ball pin seat is provided with a petal groove, a vertical lubrication groove and an annular lubrication groove.

[0009] Furthermore, the vertical lubrication groove includes a first branch groove and a second branch groove in sequence from top to bottom, and the depth of the second branch groove is greater than the depth of the first branch groove.

[0010] Furthermore, a reinforcing rib is provided at the bottom of the ball pin seat.

[0011] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0012] 1. The utility model uses a hollow annular seat in the middle to replace the original solid plate seat, thereby reducing the overall weight of the outer tie rod ball joint structure and reducing costs, which meets the current design requirements for lightweight automotive parts. At the same time, compared with the ball joint structure without a blocking seat, the compressive force of the ball joint structure is not weakened, and the design requirements for lightweight automotive parts are met without weakening the performance of the ball joint structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the outer tie rod ball joint structure of the blocking seat type of the utility model;

[0015] Figure 2 It is a cross-sectional view of the outer tie rod ball joint structure of the utility model with a blocking seat;

[0016] Figure 3 It is a structural schematic diagram of the ball pin seat of the utility model;

[0017] Icons: 1-ball pin body, 2-ball pin seat, 21-flap groove, 22-vertical lubrication groove, 221-first branch groove, 222-second branch groove, 23-annular lubrication groove, 24-reinforcement rib, 3-ball pin sleeve, 4-blocking seat, 5-external pull rod body. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example 1

[0021] The following is further described in conjunction with specific embodiments. Figure 1-Figure 3 As shown, the utility model is a plug-seat type external tie rod ball joint structure, comprising a ball pin body 1, a ball pin seat 2, a ball pin sleeve 3, a plug seat 4 and an external tie rod body 5, the ball pin sleeve 3 and the external tie rod body 5 are integrally formed, the plug seat 4 and the ball pin seat 2 are both assembled in the ball pin sleeve 3 and the plug seat 4 is located at the bottom of the ball pin seat 2, the ball pin body 1 is assembled in the ball pin seat 2 and the bottom of the ball pin seat 2 is provided with a reinforcing rib 24, the plug seat 4 is a hollow annular seat in the middle, so as to reduce the overall weight of the external tie rod ball joint structure, meet the lightweight design and reduce the material cost.

[0022] Reference Figure 2 As shown, the inner diameter of the plug seat 4 is smaller than the outer diameter of the ball pin seat 2 to ensure that the plug seat 4 can provide support for the ball pin seat 2; the outer diameter of the plug seat 4 is larger than the diameter of the ball pin seat 2, and the plug seat 4 is riveted through the rivet seam of the ball pin sleeve 3 to ensure the axial rigidity without weakening the ball joint pressure release force, which has obvious advantages in pressure release force compared to the structure without the plug seat 4. The plug seat 4 mainly transmits the axial force of the ball pin body 1 and the ball pin seat 2 during spherical motion. Based on the small axial force of the external tie rod ball joint structure, the plug seat 4 is set as a hollow ring structure in the middle, which can still fully meet the axial surface bearing capacity of the ball pin seat 2.

[0023] Reference Figure 2 , Figure 3 As shown, the bottom sealing setting of the ball pin seat 2, under the premise of setting the plug seat 4 as an annular structure, the ball pin seat 2 with a bottom sealing can prevent pollutants from entering the spherical friction pair. In this embodiment, the ball pin seat 2 is made of polyoxymethylene material, and the plug seat 4 is made of low-carbon steel material. The density of polyoxymethylene material is much smaller than that of low-carbon steel material. Therefore, the increased mass of the ball pin seat 2 with a sealed setting and the reduced mass of the plug seat 4 as an annular seat are almost negligible, and the mass of the overall structure can still be significantly reduced.

[0024] Reference Figure 3 As shown, the inner wall of the ball pin seat 2 is provided with a petal groove 21, a vertical lubricating groove 22 and an annular lubricating groove 23. The vertical lubricating groove 22 includes a first branch groove 221 and a second branch groove 222 from top to bottom, and the depth of the second branch groove 222 is greater than the depth of the first branch groove 221. The petal groove 21 is radially through, which is conducive to the assembly of the ball pin and the ball pin seat 2; the annular lubricating groove 23 can not only satisfy the lubrication function, but also reduce the assembly bending stress.

[0025] In this embodiment, the depth of the first branch groove 221 is 0.1mm-0.2mm, and the depth of the second branch groove 222 is 1mm-1.1mm. The rigidity of the lower hemisphere of the ball pin seat 2 is close to that of the upper hemisphere. In this way, the upward pull and downward pressure of the ball joint structure after riveting are basically in an equal stress state, which improves the stress uniformity of the spherical surface pair of the ball joint, thereby improving the durability of the ball joint structure. In addition, since the depth of the second branch groove 222 is relatively large, the flexibility of the spherical surface pair is increased. According to the theory of tribology: the starting torque of the automobile ball joint is mainly affected by the static friction coefficient. Under the same normal load, the larger the plastic index of the ball pin seat 2, the easier it is for the micro-convex body of the contact surface of the spherical friction pair of the ball pin seat 2 to undergo plastic flow, resulting in a smaller static friction coefficient. Therefore, by setting a second branch groove 222 with a larger depth, the starting torque of the ball joint can be reduced.

[0026] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plug-seat type outer tie rod ball joint structure, comprising a ball pin body (1), a ball pin seat (2), a ball pin sleeve (3), a plug seat (4) and an outer tie rod body (5), wherein the ball pin sleeve (3) and the outer tie rod body (5) are integrally formed, the plug seat (4) and the ball pin seat (2) are both arranged in the ball pin sleeve (3) and the plug seat (4) is located at the bottom of the ball pin seat (2), the ball pin body (1) is arranged in the ball pin seat (2), and is characterized in that: The plugging seat (4) is a hollow annular seat in the middle, the inner diameter of the plugging seat (4) is smaller than the outer diameter of the ball pin seat (2), and the outer diameter of the plugging seat (4) is larger than the diameter of the ball pin seat (2).

2. The outer tie rod ball joint structure of the blocking type according to claim 1 is characterized in that: The plug seat (4) is riveted and closed through the riveting seam of the ball pin sleeve (3).

3. The outer tie rod ball joint structure of the blocking type according to claim 1 is characterized in that: The bottom of the ball pin seat (2) is sealed.

4. The outer tie rod ball joint structure of the blocking type according to claim 1 or 3 is characterized in that: The ball pin seat (2) is made of polyoxymethylene material, and the plug seat (4) is made of low-carbon steel material.

5. The outer tie rod ball joint structure of the blocking type according to claim 1 is characterized in that: The inner wall of the ball pin seat (2) is provided with a petal groove (21), a vertical lubrication groove (22) and an annular lubrication groove (23).

6. The outer tie rod ball joint structure of the blocking type according to claim 5 is characterized in that: The vertical lubrication groove (22) comprises, from top to bottom, a first branch groove (221) and a second branch groove (222), and the depth of the second branch groove (222) is greater than the depth of the first branch groove (221).

7. The outer tie rod ball joint structure of the blocking type according to claim 1 is characterized in that: The bottom of the ball pin seat (2) is provided with a reinforcing rib (24).

Images