Double-layer composite steering pull rod

Abstract

The utility model discloses a double-layer composite steering pull rod which comprises an inner-layer rod body and an outer-layer sleeve, the inner-layer rod body is made of high-strength alloy steel, the outer-layer sleeve is made of carbon fiber reinforced composite materials, the inner-layer rod body is bonded to the inner wall of the outer-layer sleeve, threaded connection ends are arranged at the two side ends of the inner-layer rod body, and the threaded connection ends are connected with the inner-layer rod body. A positioning boss is arranged at the outer end of the inner-layer rod body, a positioning groove is formed in the inner wall of the outer-layer sleeve, heat dissipation fins are fixedly installed at the outer end of the outer-layer sleeve, and heat dissipation holes are formed in the middles of the heat dissipation fins in a penetrating mode. Preferably, the cross section of the inner-layer rod body is designed to be circular, and polishing layers are ground on the outer surface of the inner-layer rod body and the inner wall of the outer-layer sleeve respectively. According to the double-layer composite steering pull rod, the movement of a steering gear can be transmitted more accurately, the steering precision is improved, a driver can control the driving direction of a vehicle more accurately, and the control performance and the driving safety of the vehicle are improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive steering system technology, specifically a double-layer composite steering tie rod. Background Technology

[0002] The automotive steering system is a collective term for a series of devices used to change or maintain the direction of a car's movement, whether it is driving or reversing. It is like a car's "steering wheel control system." The driver transmits commands to the steering system by manipulating the steering wheel, thereby controlling the direction of the wheels' rotation and making the car move according to the driver's intention.

[0003] In the automotive steering system, the steering tie rod is one of the key components. It is responsible for transmitting the movement of the steering gear to the wheels to achieve the vehicle's steering function.

[0004] However, in practical applications, traditional steering tie rods are typically made of a single material, making it difficult to achieve an optimal balance between strength and toughness. For example, while high-strength steel can ensure sufficient strength to withstand the enormous forces during steering, its relatively poor toughness makes it prone to brittle fracture under complex stress or impact. Conversely, using materials with good toughness may result in insufficient strength, failing to meet the reliability requirements of the steering system. Furthermore, traditional steering tie rods are prone to wear and deformation when dealing with complex road conditions and frequent steering operations, leading to decreased steering accuracy and affecting driving safety. Utility Model Content

[0005] The purpose of this invention is to provide a double-layer composite steering tie rod to address the problem mentioned in the background art: traditional steering tie rods are typically made of a single material, making it difficult to achieve an optimal balance between strength and toughness. For example, while high-strength steel can ensure sufficient strength to withstand the enormous forces during steering, its toughness is relatively poor, making it prone to brittle fracture under complex stress or impact. Conversely, using materials with good toughness may result in insufficient strength, failing to meet the reliability requirements of the steering system. Furthermore, traditional steering tie rods are prone to wear and deformation when dealing with complex road conditions and frequent steering operations, leading to decreased steering accuracy and affecting driving safety.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes an inner rod and an outer sleeve. The inner rod is made of high-strength alloy steel, and the outer sleeve is made of carbon fiber reinforced composite material. The inner rod is bonded to the inner wall of the outer sleeve. Threaded connection ends are provided at both ends of the inner rod, and a positioning boss is provided at the outer end of the inner rod. A positioning groove is provided on the inner wall of the outer sleeve. Heat dissipation fins are fixedly installed at the outer end of the outer sleeve, and heat dissipation holes are provided through the center of the heat dissipation fins.

[0007] Preferably, the cross-sectional shape of the inner rod is designed to be circular, and the outer surface of the inner rod and the inner wall of the outer sleeve are respectively polished.

[0008] Preferably, the threaded connection end adopts a trapezoidal thread, and there are two threaded connection ends, which are symmetrically distributed on both sides of the inner rod body.

[0009] Preferably, the inner diameter of the outer sleeve matches the outer diameter of the inner rod.

[0010] Preferably, there are several positioning bosses, which are symmetrically distributed sequentially around the outer ends of the inner rod, and the inner wall of the positioning groove and the outer end of the positioning bosses fit together.

[0011] Preferably, there are several heat dissipation fins, which are symmetrically distributed sequentially around the outer end of the outer sleeve, and the heat dissipation fins are made of aluminum alloy.

[0012] Preferably, there are several heat dissipation holes, which are symmetrically distributed in sequence around the center of the heat dissipation fins.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model's double-layer composite structure achieves a good balance between strength and toughness, effectively reducing the risk of damage to the steering tie rod under complex working conditions and improving the reliability of the steering system. The outer sleeve of the carbon fiber reinforced composite material has excellent wear resistance, high surface hardness, and low coefficient of friction, which can effectively reduce friction and wear between it and surrounding components. At the same time, the heat dissipation area of ​​the outer sleeve is increased by heat dissipation fins and heat dissipation holes. When the steering tie rod generates heat during operation, the heat dissipation fins can increase the contact area between the air and the outer sleeve, promote heat dissipation, reduce the working temperature of the steering tie rod, and extend its service life.

[0015] This invention also achieves lightweight design, which helps reduce the unsprung mass of the vehicle, improves handling performance and fuel economy, and aligns with the development trend of the modern automotive industry. Furthermore, due to the double-layer composite structure, the steering tie rod deforms less under stress. The high strength of the inner layer ensures that it does not undergo excessive elastic deformation under tension and compression, while the carbon fiber reinforced composite material of the outer sleeve provides good stiffness and stability, further reducing bending and torsional deformation of the steering tie rod. Therefore, the double-layer composite steering tie rod can transmit steering gear movement more accurately, improve steering precision, and enable the driver to control the vehicle's direction more precisely, enhancing vehicle handling performance and driving safety. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of a double-layer composite steering tie rod according to this utility model;

[0017] Figure 2 This is a partial structural diagram of a double-layer composite steering tie rod according to the present invention.

[0018] In the diagram: 1. Inner rod; 101. Positioning boss; 2. Outer sleeve; 201. Positioning groove; 3. Threaded connection end; 4. Heat dissipation fins; 401. Heat dissipation hole. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-2 This utility model provides a double-layer composite steering tie rod technical solution: including an inner rod body 1 and an outer sleeve 2. The inner rod body 1 is made of high-strength alloy steel. The high-strength alloy gives the inner rod body 1 extremely high yield strength and tensile strength, enabling it to withstand the huge tensile and compressive forces generated during steering, ensuring the structural stability of the steering tie rod under various harsh working conditions. The cross-sectional shape of the inner rod body 1 is designed as a circle. The circular shape has uniform stress distribution characteristics, which can avoid stress concentration. At the same time, when bearing steering force, the circular cross-section can distribute the stress. The load-bearing capacity of the inner rod 1 is improved by evenly distributing the load across the entire rod body. The outer surface of the inner rod 1 and the inner wall of the outer sleeve 2 are polished. The roughness of the outer surface of the inner rod 1 and the inner wall of the outer sleeve 2 is reduced by the polishing layer. Threaded connection ends 3 are provided on both sides of the inner rod 1. The threaded connection ends 3 adopt trapezoidal threads. Trapezoidal threads have good self-locking performance and transmission efficiency. There are two threaded connection ends 3, which are symmetrically distributed on both sides of the inner rod 1, so that they can be connected to other components in the steering system.

[0021] The inner diameter of the outer sleeve 2 matches the outer diameter of the inner rod 1. The inner rod 1 is bonded to the inner wall of the outer sleeve 2. The outer sleeve 2 is made of carbon fiber reinforced composite material. The carbon fiber reinforced composite material effectively reduces the overall weight of the steering tie rod, while improving its impact resistance and wear resistance. At the same time, the polishing layer reduces the unevenness between the inner rod 1 and the outer sleeve 2, so that the inner rod 1 and the outer sleeve 2 are completely bonded together. The outer end of the inner rod 1 is provided with a positioning boss 101, and there are several positioning bosses 101, which are symmetrically distributed around the outer end of the inner rod 1. The inner wall of the outer sleeve 2 is provided with a positioning groove 201, and the inner wall of the positioning groove 201 fits with the outer end of the positioning boss 101, so that the inner rod 1 and the outer sleeve 2 are bonded and positioned by the positioning groove 201 and the positioning boss 101.

[0022] A heat dissipation fin 4 is fixedly installed on the outer end of the outer sleeve 2. There are several heat dissipation fins 4, which are symmetrically distributed sequentially on the outer end of the outer sleeve 2. The heat dissipation fins 4 are made of aluminum alloy, which has the characteristics of light weight, high heat transfer efficiency and corrosion resistance. A heat dissipation hole 401 is opened through the middle of the heat dissipation fin 4. There are several heat dissipation holes 401, which are symmetrically distributed sequentially on the middle of the heat dissipation fin 4. This increases the heat dissipation area of ​​the outer sleeve 2 by the heat dissipation fins 4 and the heat dissipation holes 401. When the steering tie rod generates heat during operation, the heat dissipation fins 4 can increase the contact area between the air and the outer sleeve 2, promote heat dissipation, reduce the working temperature of the steering tie rod and extend its service life.

[0023] Working Principle: In use, this utility model provides strong strength support through the high-strength alloy steel of the inner rod 1, which can withstand the huge load during steering and ensure that the steering tie rod will not undergo plastic deformation. The carbon fiber reinforced composite material of the outer sleeve 2 significantly enhances the toughness and impact resistance of the steering tie rod. When the steering tie rod is subjected to impact load, the carbon fiber reinforced composite material can absorb energy through its own deformation, avoiding brittle fracture of the inner rod 1. This double-layer composite structure achieves a good balance between strength and toughness, effectively reducing the risk of damage to the steering tie rod under complex working conditions and improving the reliability of the steering system. The carbon fiber reinforced composite material of the outer sleeve 2 has excellent wear resistance, with high surface hardness and low coefficient of friction, which can effectively reduce friction and wear between it and surrounding components. At the same time, the heat dissipation area of ​​the outer sleeve 2 is increased by the heat dissipation fins 4 and the heat dissipation holes 401. When the steering tie rod generates heat during operation, the heat dissipation fins 4 can increase the contact area between the air and the outer sleeve 2, promote heat dissipation, reduce the working temperature of the steering tie rod, and extend its service life.

[0024] The low-density properties of carbon fiber reinforced composite materials enable the outer sleeve 2 to significantly reduce the overall weight of the steering tie rod. Compared with traditional single-material steering tie rods, the weight of this novel double-layer composite steering tie rod is significantly reduced. This lightweight design helps reduce the unsprung mass of the vehicle, improves handling performance and fuel economy, and aligns with the development trend of the modern automotive industry. Furthermore, due to the double-layer composite structure, the steering tie rod deforms less under stress. The high strength of the inner rod 1 ensures that it does not undergo excessive elastic deformation under tension and compression, while the carbon fiber reinforced composite material of the outer sleeve 2 provides good stiffness and stability, further reducing bending and torsional deformation of the steering tie rod. Therefore, the double-layer composite steering tie rod can more accurately transmit the steering gear's movement, improve steering precision, and allow the driver to more precisely control the vehicle's direction, enhancing handling performance and driving safety.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-layer composite steering tie rod, characterized in that: The device includes an inner rod (1) and an outer sleeve (2). The inner rod (1) is made of high-strength alloy steel, and the outer sleeve (2) is made of carbon fiber reinforced composite material. The inner rod (1) is bonded to the inner wall of the outer sleeve (2). Threaded connection ends (3) are provided on both sides of the inner rod (1). A positioning boss (101) is provided on the outer end of the inner rod (1). A positioning groove (201) is provided on the inner wall of the outer sleeve (2). A heat dissipation fin (4) is fixedly installed on the outer end of the outer sleeve (2). A heat dissipation hole (401) is provided through the middle of the heat dissipation fin (4).

2. The double-layer composite steering tie rod according to claim 1, characterized in that: The inner rod (1) is designed with a circular cross-section, and the outer surface of the inner rod (1) and the inner wall of the outer sleeve (2) are polished.

3. The double-layer composite steering tie rod according to claim 2, characterized in that: The threaded connection end (3) adopts a trapezoidal thread, and there are two threaded connection ends (3), which are symmetrically distributed on both sides of the inner rod body (1).

4. A double-layer composite steering tie rod according to claim 3, characterized in that: The inner diameter of the outer sleeve (2) matches the outer diameter of the inner rod (1).

5. A double-layer composite steering tie rod according to claim 4, characterized in that: There are several positioning bosses (101), which are symmetrically distributed around the outer end of the inner rod (1). The inner wall of the positioning groove (201) and the outer end of the positioning boss (101) fit together.

6. A double-layer composite steering tie rod according to claim 5, characterized in that: There are several heat dissipation fins (4), which are symmetrically distributed at the outer end of the outer sleeve (2). The heat dissipation fins (4) are made of aluminum alloy.

7. A double-layer composite steering tie rod according to claim 6, characterized in that: There are several heat dissipation holes (401), which are symmetrically distributed in sequence around the middle of the heat dissipation fins (4).

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