Structure for improving strength of aluminum knuckle interface

Abstract

The invention discloses a structure for improving the strength of an aluminum knuckle connector. The structure comprises a Y-shaped sleeve, a knuckle body and an opponent piece. A Y-shaped hole is formed in the steering knuckle body, the Y-shaped sleeve is embedded in the Y-shaped hole, a through hole is formed in the Y-shaped sleeve, the diameter of the upper end of the through hole is larger than that of the lower end of the through hole, and the opponent piece penetrates through the upper end of the through hole and is fixedly connected with the through hole through a locking nut. Under the limit misuse working condition of a vehicle, the stress flow direction under the large load is adjusted through the structure, the strength of an aluminum steering knuckle connector is guaranteed, the aluminum steering knuckle connector cannot be broken, and through analysis and tests, the strength is improved by at least 50% under the same weight. By adjusting the size A1 / A2, the strength of the size of the joint of the steering knuckle can be improved, and the performance is improved under the condition that the cost and the weight are not increased.

Description

Technical Field

[0001] The invention relates to the field of automobile parts, and more particularly to a structure for improving the interface strength of an aluminum steering knuckle. Background Art

[0002] When a vehicle is driving on the road, due to the driver's misjudgment or operational errors, the vehicle may be subjected to a violent and instantaneous impact from the road (misuse condition), such as hitting a curb at high speed, passing through a deep pothole at high speed, etc. In this case, the vehicle will be subjected to a large load impact, and the vehicle may suffer from steering knuckle breakage and other phenomena that affect the life safety of occupants and pedestrians.

[0003] Safety accidents caused by misuse of operating conditions cause economic losses to users and even threaten their lives, leaving consumers with a bad impression that the vehicle is unreliable, which can easily lead to vehicle recalls and cause great negative impact on the company.

[0004] Current situation: Usually the aluminum steering knuckle is connected to the control arm ball head (steel). Usually the hardness of aluminum is HB80 < the hardness of steel (HB210), and the yield strength is 210MPa < 960MPa of steel. In order to prevent the steering knuckle from being crushed when the nut is tightened on the ball head, the industry's commonly used solutions are: one is to add a cylindrical steel sleeve for transition connection; the other is to increase the thickness of the steering knuckle material to improve strength.

[0005] Solution 1 is limited by the structure. The cylindrical steel sleeve and the steering knuckle body are prone to stress concentration under large loads, causing cracks in the interface. Solution 2 is limited by the mechanical properties of the material itself. It requires a lot of material thickness increase, and the improvement is limited. Both solutions cannot bear the large load transmitted by the control arm and cannot significantly improve the interface strength. Summary of the invention

[0006] One object of the present invention is to provide a new technical solution for improving the structural strength of the aluminum steering knuckle interface to solve the problems in the above-mentioned background technology. According to a first aspect of the present invention, there is provided a structure for improving the strength of an aluminum steering knuckle interface, comprising a Y-shaped sleeve, a steering knuckle body, and a counterpart; The steering knuckle body is provided with a Y-shaped hole, the Y-shaped sleeve is embedded in the Y-shaped hole, a through hole is provided in the Y-shaped sleeve, the upper end diameter of the through hole is larger than the lower end diameter, the pair of parts passes through the upper end of the through hole and is fixedly connected by a locking nut.

[0007] Optionally, according to the structure for improving the interface strength of aluminum steering knuckle of the present invention, ; ; Among them, F is the maximum force of the steering knuckle body, is the material yield strength of the Y-type sleeve, L1 is the overall length of the Y-type sleeve, L2 is the sum of the lengths of the inclined side and the vertical side of the Y-type sleeve, L3 is the length of the vertical side of the Y-type sleeve, R1 is the processing transition fillet of the Y-type sleeve, A1 is the inclination angle of the inclined side of the Y-type sleeve, D1 is the upper outer diameter of the Y-type sleeve, D2 is the upper outer diameter of the through hole, D3 is the lower outer diameter of the through hole, and D4 is the lower outer diameter of the Y-type sleeve.

[0008] Optionally, according to the structure for improving the interface strength of an aluminum steering knuckle of the present invention, L2=L1-1.5mm; R1=2mm.

[0009] Optionally, according to the structure for improving the interface strength of aluminum steering knuckle of the present invention,

[0010] Among them, L5 is the sum of the lengths of the inclined side and the vertical side of the Y-type hole, L6 is the length of the vertical side of the Y-type hole, D5 is the upper diameter of the Y-type hole, D6 is the lower outer diameter of the Y-type hole, R2 is the processing transition radius of the Y-type hole, and A2 is the inclination angle of the inclined side of the Y-type hole.

[0011] Optionally, according to the structure for improving the interface strength of an aluminum steering knuckle of the present invention, D5=D1; D6=D4; A2=A1; L5=L2.

[0012] Optionally, according to the structure for improving the interface strength of the aluminum steering knuckle of the present invention, R2=R1+1.5mm.

[0013] Optionally, according to the structure for improving the interface strength of an aluminum steering knuckle of the present invention, the Y-shaped sleeve is made of steel.

[0014] Optionally, according to the structure for improving the interface strength of an aluminum steering knuckle of the present invention, the steering knuckle body is made of aluminum.

[0015] Under extreme misuse conditions of the vehicle, the present invention adjusts the stress flow direction under large loads through the structure to ensure the strength of the aluminum steering knuckle interface so that it will not break. Through analysis and testing, the strength is increased by at least 50% under the same weight. By adjusting the dimensions A1 / A2, the strength of the steering knuckle interface dimensions can be increased, and the performance can be improved without increasing the cost and weight.

[0016] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. Figure 1 It is a schematic diagram of the structure for improving the interface strength of the aluminum steering knuckle disclosed in the present invention; Figure 2 It is a structural schematic diagram of the Y-shaped sleeve disclosed in the present invention; Figure 3 It is a schematic structural diagram of the steering knuckle body disclosed in the present invention.

[0018] Description of reference numerals: 1-Y-type sleeve; 2-steering knuckle body; 3-locking nut; 4-opposite piece. DETAILED DESCRIPTION

[0019] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0020] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0021] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0022] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0023] according to Figure 1 As shown, the present invention provides a structure for improving the strength of the aluminum steering knuckle interface, comprising a Y-shaped sleeve 1, a steering knuckle body 2 and a pair of hand pieces 4. The Y-shaped sleeve 1 is made of steel, and the steering knuckle body 2 is made of aluminum.

[0024] A Y-shaped hole is provided in the steering knuckle body 2, and a Y-shaped sleeve 1 is embedded in the Y-shaped hole. A through hole is provided in the Y-shaped sleeve 1, and the upper end diameter of the through hole is larger than the lower end diameter. The hand piece 4 passes through the upper end of the through hole and is fixedly connected by the locking nut 3.

[0025] Further, according to Figure 2 As shown, the size of the Y-shaped sleeve 1 in the present invention meets the following conditions, and the strength of the steering knuckle body 2 can be improved by adjusting the local size structure according to the needs; wherein L1\D1\D2\D3 are designed to match the size of the hand piece 4; ; ; Wherein, F is the maximum force of the steering knuckle body 2, is the material yield strength of the Y-type sleeve 1, L1 is the overall length of the Y-type sleeve 1, L2 is the sum of the lengths of the inclined side and the vertical side of the Y-type sleeve 1, L3 is the length of the vertical side of the Y-type sleeve 1, R1 is the processing transition radius of the Y-type sleeve 1, A1 is the inclination angle of the inclined side of the Y-type sleeve 1, D1 is the upper outer diameter of the Y-type sleeve 1, D2 is the upper outer diameter of the through hole, D3 is the lower outer diameter of the through hole, and D4 is the lower outer diameter of the Y-type sleeve 1.

[0026] Furthermore, L2=L1-1.5mm; R1=2mm.

[0027] Further, according to Figure 3 As shown, the steering knuckle in the present invention meets the following conditions:

[0028] Among them, L5 is the sum of the lengths of the inclined side and the vertical side of the Y-type hole, L6 is the length of the vertical side of the Y-type hole, D5 is the upper diameter of the Y-type hole, D6 is the lower outer diameter of the Y-type hole, R2 is the processing transition radius of the Y-type hole, and A2 is the inclination angle of the inclined side of the Y-type hole.

[0029] Furthermore, D5=D1; D6=D4; A2=A1; L5=L2. This allows the Y-shaped hole of the steering knuckle body 2 to be stably matched with the Y-shaped sleeve 1. In the figure, L4=L5+0.5mm.

[0030] Furthermore, R2=R1+1.5mm.

[0031] In the figure, L7 is a free processing height, which can be matched with the locking nut 3; The locking nut 3 is a conventional standard part, used to connect and fix the opponent part 4 and the steering knuckle body 2; The basic dimensions of the hand piece 4 will affect some dimensions of the Y-shaped sleeve 11 when they are in matching contact with each other. By adjusting the dimensions A1 / A2, the strength of the knuckle interface dimensions can be increased, thereby improving performance without increasing cost and weight.

[0032] Under extreme misuse conditions of the vehicle, the present invention adjusts the stress flow direction under large loads through the structure to ensure the strength of the aluminum steering knuckle interface so that it will not break. Through analysis and testing, the strength is improved by at least 50% under the same weight.

[0033] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A structure for improving the strength of an aluminum steering knuckle interface, characterized in that: It includes a Y-type bushing, a steering knuckle body and a pair of hand parts; The steering knuckle body is provided with a Y-shaped hole, the Y-shaped sleeve is embedded in the Y-shaped hole, a through hole is provided in the Y-shaped sleeve, the upper end diameter of the through hole is larger than the lower end diameter, the pair of parts passes through the upper end of the through hole and is fixedly connected by a locking nut.

2. The structure for improving the strength of the aluminum steering knuckle interface according to claim 1, characterized in that: ； ； Among them, F is the maximum force of the steering knuckle body, is the material yield strength of the Y-type sleeve, L1 is the overall length of the Y-type sleeve, L2 is the sum of the lengths of the inclined side and the vertical side of the Y-type sleeve, L3 is the length of the vertical side of the Y-type sleeve, R1 is the processing transition fillet of the Y-type sleeve, A1 is the inclination angle of the inclined side of the Y-type sleeve, D1 is the upper outer diameter of the Y-type sleeve, D2 is the upper outer diameter of the through hole, D3 is the lower outer diameter of the through hole, and D4 is the lower outer diameter of the Y-type sleeve.

3. The structure for improving the interface strength of aluminum steering knuckle according to claim 2, characterized in that: L2=L1-1.5mm; R1=2mm.

4. The structure for improving the strength of the aluminum steering knuckle interface according to claim 2, characterized in that: ； Among them, L5 is the sum of the lengths of the inclined side and the vertical side of the Y-type hole, L6 is the length of the vertical side of the Y-type hole, D5 is the upper diameter of the Y-type hole, D6 is the lower outer diameter of the Y-type hole, R2 is the processing transition radius of the Y-type hole, and A2 is the inclination angle of the inclined side of the Y-type hole.

5. The structure for improving the strength of the aluminum steering knuckle interface according to claim 4, characterized in that: D5=D1; D6=D4; A2=A1; L5=L2.

6. The structure for improving the strength of the aluminum steering knuckle interface according to claim 4, characterized in that: R2=R1+1.5mm.

7. The structure for improving the interface strength of aluminum steering knuckle according to claim 1, characterized in that: The Y-shaped sleeve is made of steel.

8. The structure for improving the strength of the aluminum steering knuckle interface according to claim 2, characterized in that: The knuckle body is made of aluminum.

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