High-strength disc type steering knuckle

Abstract

A high-strength disc type steering knuckle relates to the technical field of steering knuckle processing and comprises a steering main body, the steering main body comprises a supporting part, and a pull rod connecting part, a fork arm connecting part and a brake caliper connecting part are connected to the side face of the supporting part and are all integrally formed with the supporting part; a mounting hole is formed in the center of the supporting part in a penetrating mode, a reinforcing cylinder is connected to the bottom of the pull rod connecting part, the reinforcing cylinder and the mounting hole are coaxially arranged, and a stepped hole is formed in the reinforcing cylinder in a penetrating mode; the steering knuckle further comprises a shaft neck rod, the shaft neck rod is arranged to be in a step shape and sequentially penetrates through the installation hole and the step hole from top to bottom, the step position of the shaft neck rod is matched with the step hole, and the top end of the shaft neck rod and the side wall of the installation hole are fixed through a metallurgical bonding layer. The main body and the shaft neck rod can be machined respectively, the situation that the quality of the shaft neck rod is poor when the shaft neck rod is integrally machined is effectively avoided, the number of steering knuckles which do not meet the standard is greatly reduced, and waste of raw materials is reduced.

Description

Technical Field

[0001] This utility model relates to the field of steering knuckle processing technology, specifically a high-strength disc steering knuckle. Background Technology

[0002] The steering knuckle is a crucial component of the automotive steering axle, enabling the vehicle to move and sensitively transmit directional information. Its primary function is to transmit and bear the load from the front of the vehicle, supporting and driving the front wheels to rotate around the kingpin, thus steering the car. As a hinge for wheel steering, it is typically fork-shaped. In existing technologies, steering knuckles are usually designed as a single, integral structure, formed by forging (or extrusion casting). However, forging integral steering knuckle blanks is costly, and the steering knuckle journal is located deep within the die, making the ends prone to incomplete material filling and non-standard forming, leading to product scrap. Existing split-type steering knuckles, connecting the journal to the main body via flanges, solve the forging process problem, but have lower overall strength and are prone to breakage during use. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model provides a high-strength disc steering knuckle.

[0004] The technical solution of this utility model is as follows:

[0005] A high-strength disc steering knuckle includes a steering body, the steering body including a support portion, and the support portion having a tie rod connection portion, a fork arm connection portion and a brake caliper connection portion connected to its side, all of which are integrally formed with the support portion;

[0006] The support part has a through-hole in the center, and the bottom of the tie rod connection part is connected to a reinforcing cylinder, which is coaxially arranged with the mounting hole. The reinforcing cylinder has a stepped hole through it.

[0007] The steering knuckle also includes a journal rod, which is stepped and passes through the mounting hole and the stepped hole from top to bottom, with the stepped position matching the stepped hole. The top of the journal rod is fixed to the side wall of the mounting hole by a metallurgical bonding layer.

[0008] To improve the strength of the journal, an internal thread is provided at the bottom of the mounting hole, and an external thread is provided at the upper end of the journal. The upper end of the journal is fixed to the mounting hole through thread engagement.

[0009] To improve the connection strength between the journal rod and the reinforcing cylinder, multiple first threaded holes are provided on the periphery of the reinforcing cylinder and the upper periphery of the journal rod, and multiple first reinforcing bolts are used to fix the reinforcing cylinder and the journal rod through the corresponding first threaded holes.

[0010] To avoid damage to the first threaded hole and the external thread in the journal shaft, the lowest point of the external thread is higher than the first threaded hole.

[0011] In order to support the reinforcing cylinder and improve the support strength of the journal rod, a support cylinder is provided at the bottom of the reinforcing cylinder, and the support cylinder is fixedly connected to the reinforcing cylinder.

[0012] The support cylinder and the reinforcing cylinder are fixed by means that the support cylinder has multiple second threaded holes vertically through it, and the bottom of the reinforcing cylinder has multiple third threaded holes corresponding to it. The reinforcing cylinder and the support cylinder are fixed by means of second reinforcing bolts passing through the second threaded holes and the third threaded holes.

[0013] To avoid the first and second reinforcing bolts obstructing the installation of the steering knuckle and to improve the overall compactness of the steering knuckle, the first and second threaded holes on the periphery of the reinforcing cylinder are recessed.

[0014] The fork arm connection is designed such that there are two fork arm connections arranged opposite each other along the support, and the position of the tie rod connection on the side of the support is perpendicular to the position of the fork arm connection.

[0015] To improve the strength of the tie rod connection, reinforcing ribs are provided on both sides of the tie rod connection, and the reinforcing ribs are connected to the fork arm connection.

[0016] The beneficial effects of this utility model are as follows: This utility model is a high-strength disc steering knuckle. Firstly, through the designed support part combined with the integrally formed tie rod connection part, fork arm connection part, and brake caliper connection part, the basic function of the steering knuckle is realized, enabling it to be installed in the steering system of an automobile and realize the basic steering function. Secondly, in this solution, the journal rod and the support part adopt a split connection method, which allows the main body and the journal rod to be processed separately. This effectively avoids the situation of poor quality caused by the difficulty of filling the journal rod part when processing it as a whole, greatly reducing the number of non-standard steering knuckles and reducing the waste of raw materials. Furthermore, the connection between the journal rod and the support part adopts a metallurgical combination such as welding, which is convenient and quick to connect the two. Moreover, by setting a fixed cylinder and a reinforcing cylinder, different parts of the journal rod can be effectively supported. Compared with a simple flange connection, the support strength of the journal rod is greatly improved, and its service life and safety factor in the steering system are improved. Attached Figure Description

[0017] The advantages and solutions of this application will become clear to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this invention.

[0018] In the attached diagram:

[0019] Figure 1 This is a schematic diagram of the steering knuckle structure (overall structure);

[0020] Figure 2 This is a partial cross-sectional view of the steering knuckle;

[0021] Figure 3 This is a schematic diagram of the support cylinder and support structure;

[0022] Figure 4 This is a schematic diagram of the steering knuckle structure (without reinforcement plates).

[0023] The components represented by the various reference numerals in the diagram are:

[0024] 1. Steering body; 110. Support part; 120. Tie rod connection part; 130. Fork arm connection part; 140. Brake caliper connection part; 2. Mounting hole; 3. Reinforcing cylinder; 4. Stepped hole; 5. Journal rod; 6. Metallurgical bonding layer; 7. First threaded hole; 8. First reinforcing bolt; 9. Support cylinder; 10. Second threaded hole; 11. Third threaded hole; 12. Second reinforcing bolt; 13. Reinforcing rib; 14. Reinforcing plate. Detailed Implementation

[0025] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0026] Example

[0027] As mentioned in the background section, the steering knuckle is an essential part of the automotive steering system. Most existing steering knuckles are one-piece molded designs, but they have many defects in the manufacturing process. The most serious defect is the poor molding quality of the journal rod, which can result in a large number of defective products and a low yield rate. However, in existing split steering knuckles, the journal rod is only mounted to the main body using a flange, resulting in low strength at the connection point, which can seriously reduce service life and safety. Therefore, the inventors have improved upon the existing split steering knuckle technology and designed a new type of high-strength steering knuckle, which will be explained in detail below with reference to the illustrations.

[0028] This embodiment provides a high-strength disc steering knuckle. See [link / reference] Figure 1 and Figure 4The system includes a steering body 1, which includes a support portion 110. The support portion 110 has a tie rod connection portion 120, a fork arm connection portion 130, and a brake caliper connection portion 140 connected to its side, all of which are integrally formed with the support portion 110. The integral forming technology of the connection portion and the support portion 110 is forging, which is existing technology. The arrangement position and extension direction of each connection portion are formed in the mold. The connection position of this solution and the steering system have not been changed, so it will not be described in detail. It should be noted that there are two fork arm connection portions 130, which are arranged opposite to each other along the support portion 110. The position of the tie rod connection portion 120 on the side of the support portion 110 is perpendicular to the position of the fork arm connection portion 130, that is, the positions where the ends of the two are connected to the support portion 110 are perpendicular.

[0029] Based on the above structure, the pull rod connecting part 120 is provided with reinforcing ribs 13 on both sides, and the reinforcing ribs 13 are connected to the fork arm connecting part 130. The reinforcing ribs 13 are triangular in shape, and their sides are connected to the fork arm connecting part 130 and the pull rod connecting part 120 respectively, playing a role in strengthening the support between the two. Moreover, since the fork arm connecting part 130 is bent upward, this part is prone to bending when connected and used. In order to strengthen the strength of this part when connected, a reinforcing plate 14 is connected to the inner side of the fork arm connecting part 130. It can be fixed by welding or other methods, and its shape is consistent with the bending shape of the fork arm connecting part 130. The reinforcing plate 14 extends downward to connect with the upper end face of the support part 110, so that the fork arm connecting part 130 and the support part 110 are connected, thereby strengthening the support strength of the support part 110 for the fork arm connecting part 130.

[0030] In this embodiment, the support part 110 has a through-hole 2 at its center, which is vertically oriented. The bottom of the tie rod connecting part 120 is connected to a reinforcing cylinder 3, which is integrally forged with the tie rod connecting part 120. The tie rod connecting part 120 is curved upwards. The reinforcing cylinder 3 is integrally formed at the bottom of the tie rod connecting part 120 and is coaxially arranged with the mounting hole 2, that is, the reinforcing cylinder 3 is located directly below the mounting hole 2. The reinforcing cylinder 3 has a through-hole 4, which is connected to the mounting hole 2. The upper diameter of the stepped hole 4 is larger than that of the lower diameter, and the upper diameter is the same as the inner diameter of the mounting hole 2.

[0031] The steering knuckle also includes a journal 5. The connection between the journal 5 and other parts of the steering system is existing technology and will not be described in detail. The journal 5 is set in a stepped shape, that is, the diameter of the uppermost end of the journal 5 is larger than the diameter of the lower end, but the diameter of a larger part is much smaller than the length of the lower end. It passes through the mounting hole 2 and the stepped hole 4 from top to bottom, and its stepped position is adapted to the stepped hole 4. That is, the position with the larger diameter of the journal 5 abuts against the position with the larger diameter of the stepped hole 4, and the diameters are the same. The smaller diameter part of the journal 5 (the middle part of the journal 5 as shown in the figure) has the same diameter as the smaller diameter of the stepped hole 4. The top of the journal 5 is fixed to the side wall of the mounting hole 2 by a metallurgical bonding layer 6. In this solution, the metallurgical bonding layer 6 can be formed by welding or additive manufacturing to fix the two.

[0032] Based on the above structure, combined with Figure 2 The mounting hole 2 has an internal thread at its bottom, and the journal 5 has an external thread at its upper end. The threads are not shown in the figure, but their location is described below, that is, the outer side of the larger diameter part of the journal 5. The upper end of the journal 5 is fixed to the mounting hole 2 through thread engagement. The thread engagement can strengthen the connection between the journal 5 and the support part 110. Secondly, multiple first threaded holes 7 are opened on the periphery of the reinforcing cylinder 3 and the periphery of the upper end of the journal 5. Moreover, the threaded holes of both should ensure that they can remain aligned after the journal 5 and the mounting hole 2 are threaded. Multiple first reinforcing bolts 8 are used to fix the reinforcing cylinder 3 and the journal 5 through the corresponding first threaded holes 7. The first threaded holes 7 on the periphery of the reinforcing cylinder 3 adopt a recessed design, which can screw the first reinforcing bolts 8 into the inner side of the reinforcing cylinder 3, thereby improving the compactness of the overall steering knuckle.

[0033] Furthermore, it should be noted that the lowest position of the external thread is higher than the first threaded hole 7. In this design, the lowest position of the external thread is flush with the lowest position of the mounting hole 2, ensuring that the external thread does not exceed the support part 110, thereby avoiding damage to the external thread when opening the first threaded hole 7 and installing the first reinforcing bolt 8.

[0034] This embodiment also incorporates a support design for the reinforcing cylinder 3, combined with... Figure 3Specifically, a support cylinder 9 is provided at the bottom of the reinforcing cylinder 3, and the support cylinder 9 is connected and fixed to the reinforcing cylinder 3. The support cylinder 9 and the reinforcing cylinder 3 are detachably connected. On the one hand, the bottom of the reinforcing cylinder 3 is supported. On the other hand, the inner diameter of the support cylinder 9 is consistent with the diameter of the smaller part of the journal 5, which can support the journal 5. Furthermore, the support cylinder 9 has multiple second threaded holes 10 vertically through it, and the multiple second threaded holes 10 are opened around the circumference of the support cylinder 9. The bottom of the reinforcing cylinder 3 has multiple third threaded holes 11 corresponding to each other. The number and position of the third threaded holes 11 relative to the axis of the journal 5 are consistent with the second threaded holes 10. The support cylinder 9 is fitted on the outside of the journal 5 and abuts against the reinforcing cylinder 3. The reinforcing cylinder 3 and the support cylinder 9 are fixed by the second reinforcing bolt 12 passing through the second threaded holes 10 and the third threaded holes 11. Moreover, the second threaded holes 10 are recessed, which allows the end of the second reinforcing bolt 12 to enter the second threaded hole 10 after tightening, making the bottom of the support cylinder 9 more compact.

Claims

1. A high-strength disc steering knuckle, comprising a steering body (1), the steering body (1) including a support portion (110), wherein the support portion (110) is side-connected to a tie rod connecting portion (120), a fork arm connecting portion (130), and a brake caliper connecting portion (140), all of which are integrally formed with the support portion (110), characterized in that, The support part (110) has a through mounting hole (2) in the center, and the bottom of the tie rod connecting part (120) is connected to a reinforcing cylinder (3), and the reinforcing cylinder (3) is coaxially arranged with the mounting hole (2). The reinforcing cylinder (3) has a through stepped hole (4). The steering knuckle also includes a journal rod (5), and the journal rod (5) is stepped, passing through the mounting hole (2) and the stepped hole (4) from top to bottom, and the stepped position is adapted to the stepped hole (4). The top of the journal rod (5) is fixed to the side wall of the mounting hole (2) by a metallurgical bonding layer (6).

2. The high-strength disc steering knuckle according to claim 1, characterized in that, The mounting hole (2) has an internal thread at the bottom and the journal rod (5) has an external thread at the top. The upper end of the journal rod (5) is fixed to the mounting hole (2) through thread engagement.

3. The high-strength disc steering knuckle according to claim 2, characterized in that, Multiple first threaded holes (7) are provided on the periphery of the reinforcing cylinder (3) and the upper periphery of the journal rod (5), and multiple first reinforcing bolts (8) are used to fix the reinforcing cylinder (3) and the journal rod (5) through the corresponding first threaded holes (7).

4. The high-strength disc steering knuckle according to claim 3, characterized in that, The lowest point of the external thread is higher than the first threaded hole (7).

5. The high-strength disc steering knuckle according to claim 2, characterized in that, The bottom of the reinforcing cylinder (3) is provided with a support cylinder (9), and the support cylinder (9) is connected and fixed to the reinforcing cylinder (3).

6. The high-strength disc steering knuckle according to claim 5, characterized in that, The support cylinder (9) has multiple second threaded holes (10) vertically through it, and the bottom of the reinforcing cylinder (3) has multiple third threaded holes (11) corresponding to it. The reinforcing cylinder (3) and the support cylinder (9) are fixed by the second reinforcing bolt (12) passing through the second threaded holes (10) and the third threaded holes (11).

7. The high-strength disc steering knuckle according to claim 6, characterized in that, The first threaded hole (7) and the second threaded hole (10) on the periphery of the reinforcing cylinder (3) are recessed.

8. The high-strength disc steering knuckle according to claim 1, characterized in that, Two fork arm connecting parts (130) are provided and are arranged opposite to each other along the support part (110). The position of the pull rod connecting part (120) on the side of the support part (110) is perpendicular to the position of the fork arm connecting part (130).

9. The high-strength disc steering knuckle according to claim 8, characterized in that, The pull rod connecting part (120) is provided with reinforcing ribs (13) on both sides, and the reinforcing ribs (13) are connected to the fork arm connecting part (130).

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