Finish rolling seamless steel pipe for piston rod of shock absorber

Abstract

The utility model relates to the technical field of seamless steel tubes, in particular to a finish rolling seamless steel tube for a piston rod of a shock absorber, which comprises a steel tube body made of high-quality carbon structural steel and processed by a finish rolling process, the outer diameter tolerance of the steel tube body is controlled within + / -0.1 mm to + / -0.3 mm, and the wall thickness tolerance of the steel tube body is controlled within + / -10% to + / -15%. The surface roughness Ra ranges from 0.8 micrometer to 3.2 micrometers, the wear-resisting layer is arranged on the outer surface of the steel pipe body, the thickness of the wear-resisting layer ranges from 0.01 mm to 0.03 mm, the corrosion-resisting layer is located on the outer side of the wear-resisting layer, and the thickness of the corrosion-resisting layer ranges from 0.02 mm to 0.05 mm. The piston rod has the advantages that the steel pipe body machined through the finish rolling technology has high size precision and good surface smoothness, the high-precision working requirement of a shock absorber can be met, it is guaranteed that fit clearances between the piston rod body and other parts are even, and the shock absorption effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of seamless steel pipe technology, and in particular to a precision-rolled seamless steel pipe for shock absorber piston rods. Background Technology

[0002] Shock absorbers are important components in automobiles, motorcycles, and many industrial equipment used to reduce vibration and improve driving stability and comfort. As a key component of the shock absorber, the performance of the piston rod directly affects the working effect and service life of the shock absorber.

[0003] Currently, seamless steel pipes used for shock absorber piston rods have some shortcomings. The dimensional accuracy and surface quality of ordinary seamless steel pipes are difficult to meet the high-precision working requirements of shock absorbers, resulting in uneven clearance between the piston rod and other components of the shock absorber, which affects the damping effect. In addition, during long-term use, the piston rod will be subjected to frequent impacts and friction. Ordinary seamless steel pipes have poor wear resistance and corrosion resistance, and are prone to wear, rust, and other problems, which shorten the service life of the piston rod and increase maintenance costs.

[0004] To address the above issues, we have introduced a precision-rolled seamless steel tube for shock absorber piston rods. Utility Model Content

[0005] This utility model discloses a precision-rolled seamless steel pipe for shock absorber piston rods, aiming to solve the technical problems in the background art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A precision-rolled seamless steel pipe for a shock absorber piston rod includes a pipe body made of high-quality carbon structural steel, precision-rolled, with the outer diameter tolerance controlled within ±0.1 mm to ±0.3 mm, the wall thickness tolerance controlled within ±10% to ±15%, and the surface roughness Ra between 0.8 and 3.2 micrometers. It also includes: a wear-resistant layer, formed by electroplating of a high-hardness alloy material on the outer surface of the pipe body, with a thickness of 0.01-0.03 mm; a corrosion-resistant layer, located outside the wear-resistant layer, made of metal plating, with a thickness of 0.02-0.05 mm; a piston rod body, disposed inside the pipe body; and a sealing ring, embedded at one end inside the pipe body and used in conjunction with the piston rod body.

[0008] By combining the steel pipe body, wear-resistant layer, corrosion-resistant layer, piston rod body, and sealing ring, the high-performance requirements of the shock absorber piston rod are achieved. The precision rolling process of the steel pipe body ensures dimensional accuracy and surface quality. The wear-resistant and corrosion-resistant layers improve the durability and corrosion resistance of the steel pipe. The sealing ring ensures the sealing performance of the piston rod, improves the service life and reliability of the shock absorber, and ensures its stable operation in harsh environments.

[0009] In a preferred embodiment, a transition layer is provided between the wear-resistant layer and the steel pipe body. The transition layer is made of a material that has good bonding performance with both the wear-resistant layer and the steel pipe body, and has a thickness of 0.05mm-0.2mm.

[0010] By setting a transition layer to enhance the bonding force between the wear-resistant layer and the steel pipe body 1, the wear-resistant layer is prevented from falling off, the adhesion and stability of the wear-resistant layer are improved, and the long-term durability of the steel pipe is ensured.

[0011] In a preferred embodiment, the surface of the corrosion-resistant layer is passivated to form a dense passivation film.

[0012] By implementing passivation treatment to improve the protective performance of the corrosion-resistant layer, a dense passivation film is formed to enhance corrosion resistance, further improving the corrosion resistance of the steel pipe and extending its service life.

[0013] In a preferred embodiment, baffles are fixedly connected to the ends of the steel pipe body and the piston rod body that are far apart from each other, and a spring is fixedly connected between the two baffles and outside the steel pipe body and the piston rod body.

[0014] By incorporating baffles and springs to provide elastic support for the shock absorber, external impact forces are absorbed and buffered, improving the shock absorption effect and stability of the shock absorber and ensuring its reliable operation under dynamic loads.

[0015] In a preferred embodiment, a connecting block is fixedly connected to each of the two baffles on the opposite sides, and a mounting base is fixedly connected to each of the two connecting blocks on the opposite sides.

[0016] By incorporating connecting blocks and mounting bases to facilitate the installation and fixation of the shock absorber, a stable connection with the vehicle or other equipment is ensured, thereby improving the ease of installation and reliability of the shock absorber and ensuring its stability in practical applications.

[0017] In a preferred embodiment, two reinforcing ribs are fixedly connected between both sides of the connecting block and one side of the mounting base.

[0018] By adding reinforcing ribs to enhance the structural strength between the connecting block and the mounting base, the connection part is prevented from deforming or breaking under load, thereby improving the overall structural strength and durability of the shock absorber and ensuring its reliability in long-term use.

[0019] The precision-rolled seamless steel pipe for shock absorber piston rods provided by this utility model has the following advantages:

[0020] In this utility model, the precision rolling process of the steel pipe body ensures dimensional accuracy and surface quality, the wear-resistant layer and corrosion-resistant layer improve the durability and corrosion resistance of the steel pipe, the sealing ring ensures the sealing performance of the piston rod, improves the service life and reliability of the shock absorber, and ensures its stable operation in harsh environments.

[0021] 1. The steel pipe body processed by precision rolling has high dimensional accuracy and good surface finish, which can meet the high-precision working requirements of the shock absorber, ensure uniform fit clearance between the piston rod body and other components, and improve the shock absorption effect;

[0022] 2. The addition of wear-resistant and corrosion-resistant layers improves the wear resistance and corrosion resistance of the steel pipe body, reduces wear and corrosion during use, extends the service life of the piston rod body, and reduces maintenance costs.

[0023] 3. The sealing ring at one end of the steel pipe body facilitates the connection between the piston rod body and the steel pipe body, ensuring the sealing performance of the shock absorber and greatly improving the operation quality and efficiency compared to traditional devices. Attached Figure Description

[0024] Figure 1 This is a first-view perspective three-dimensional schematic diagram of a precision-rolled seamless steel pipe for a shock absorber piston rod proposed in this utility model.

[0025] Figure 2 This is a second-view perspective three-dimensional schematic diagram of a precision-rolled seamless steel pipe for a shock absorber piston rod proposed in this utility model.

[0026] Figure 3 This is an exploded structural diagram of a precision-rolled seamless steel pipe for a shock absorber piston rod proposed in this utility model.

[0027] Figure 4 This is a cross-sectional schematic diagram of the steel pipe body of a precision-rolled seamless steel pipe for a shock absorber piston rod proposed in this utility model.

[0028] Figure 5 This is a partial cross-sectional schematic diagram of a precision-rolled seamless steel pipe for a shock absorber piston rod proposed in this utility model.

[0029] In the attached diagram: 1. Steel pipe body; 101. Wear-resistant layer; 102. Corrosion-resistant layer; 2. Piston rod body; 3. Sealing ring; 4. Baffle; 5. Spring; 6. Connecting block; 7. Mounting base; 8. Reinforcing rib. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0031] The precision-rolled seamless steel pipe for shock absorber piston rod disclosed in this utility model is mainly used in seamless steel pipe applications.

[0032] Reference Figures 1-5 A precision-rolled seamless steel pipe for a shock absorber piston rod includes a pipe body 1, which is made of high-quality carbon structural steel and processed by precision rolling. The outer diameter tolerance of the pipe body 1 is controlled within ±0.1 mm to ±0.3 mm, the wall thickness tolerance is controlled within ±10% to ±15%, and the surface roughness Ra is between 0.8 and 3.2 micrometers. It also includes: a wear-resistant layer 101, which is disposed on the outer surface of the pipe body 1 and is formed by electroplating of a high-hardness alloy material with a thickness of 0.01-0.03 mm; a corrosion-resistant layer 102, which is located outside the wear-resistant layer 101 and is made of a metal plating with a thickness of 0.02-0.05 mm; a piston rod body 2, which is disposed inside the pipe body 1; and a sealing ring 3, which is embedded at one end inside the pipe body 1 and works in conjunction with the piston rod body 2.

[0033] In this embodiment, the high-performance requirements of the shock absorber piston rod are achieved through the combination of the steel pipe body 1, the wear-resistant layer 101, the corrosion-resistant layer 102, the piston rod body 2, and the sealing ring 3. The precision rolling process of the steel pipe body 1 ensures dimensional accuracy and surface quality. The wear-resistant layer 101 and the corrosion-resistant layer 102 improve the durability and corrosion resistance of the steel pipe. The sealing ring 3 ensures the sealing performance of the piston rod, improves the service life and reliability of the shock absorber, and ensures its stable operation in harsh environments.

[0034] In a preferred embodiment, a transition layer is provided between the wear-resistant layer 101 and the steel pipe body 1. The transition layer is made of a material that has good bonding performance with both the wear-resistant layer 101 and the steel pipe body 1, and has a thickness of 0.05mm-0.2mm.

[0035] In this embodiment, the transition layer is used to enhance the bonding force between the wear-resistant layer 101 and the steel pipe body 1, prevent the wear-resistant layer 101 from falling off, improve the adhesion and stability of the wear-resistant layer 101, and ensure the long-term durability of the steel pipe.

[0036] In a preferred embodiment, the surface of the corrosion-resistant layer 102 is passivated to form a dense passivation film.

[0037] In this embodiment, passivation treatment is used to improve the protective performance of the corrosion-resistant layer 102, forming a dense passivation film to enhance corrosion resistance, further improving the corrosion resistance of the steel pipe and extending its service life.

[0038] In a preferred embodiment, baffles 4 are fixedly connected to the ends of the steel pipe body 1 and the piston rod body 2 that are far apart from each other, and springs 5 ​​are fixedly connected between the two baffles 4 and outside the steel pipe body 1 and the piston rod body 2.

[0039] In this embodiment, the baffle 4 and spring 5 are used to provide elastic support for the shock absorber, absorb and buffer external impact forces, improve the shock absorption effect and stability of the shock absorber, and ensure its reliable operation under dynamic load.

[0040] In a preferred embodiment, a connecting block 6 is fixedly connected to the side of each of the two baffles 4 that is far apart, and a mounting base 7 is fixedly connected to the side of each of the two connecting blocks 6 that is far apart.

[0041] In this embodiment, the connecting block 6 and the mounting base 7 are used to facilitate the installation and fixation of the shock absorber, ensuring its stable connection with the vehicle or other equipment, improving the installation convenience and reliability of the shock absorber, and ensuring its stability in practical applications.

[0042] In a preferred embodiment, two reinforcing ribs 8 are fixedly connected between both sides of the connecting block 6 and one side of the mounting base 7.

[0043] In this embodiment, the reinforcing rib 8 is used to enhance the structural strength between the connecting block 6 and the mounting base 7, prevent the connection from deforming or breaking under load, improve the overall structural strength and durability of the shock absorber, and ensure its reliability in long-term use.

[0044] Working principle: During use, the piston rod body 2 moves inside the steel pipe body 1. Through the elastic action of the spring 5, it absorbs and mitigates external impact forces, achieving a shock absorption effect. The outer surface of the steel pipe body 1 is provided with a wear-resistant layer 101 and a corrosion-resistant layer 102. The wear-resistant layer 101 improves the wear resistance of the steel pipe, and the corrosion-resistant layer 102 forms a dense passivation film through passivation treatment, enhancing the corrosion resistance of the steel pipe. The sealing ring 3 is embedded in one end inside the steel pipe body 1 and works in conjunction with the piston rod body 2 to ensure sealing during movement and prevent leakage. The baffle 4 and the connecting block 6 are connected to the mounting base 7 through reinforcing ribs 8, enhancing the stability of the overall structure. The steel pipe body 1, processed by precision rolling, has high dimensional accuracy and good surface finish, which can meet the high-precision working requirements of the shock absorber, ensuring uniform clearance between the piston rod body 2 and other components, improving the shock absorption effect, and greatly improving the operation quality and efficiency compared to traditional devices.

[0045] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. A precision-rolled seamless steel pipe for a shock absorber piston rod, comprising a steel pipe body (1), characterized in that, The steel pipe body (1) is made of high-quality carbon structural steel and processed by precision rolling. The outer diameter tolerance of the steel pipe body (1) is controlled within ±0.1 mm to ±0.3 mm, the wall thickness tolerance is controlled within ±10% to ±15%, and the surface roughness Ra reaches between 0.8 and 3.2 micrometers. It also includes: Wear-resistant layer (101), the wear-resistant layer (101) is disposed on the outer surface of the steel pipe body (1), and is formed by electroplating of a high-hardness alloy material, with a thickness of 0.01-0.03 mm; A corrosion-resistant layer (102) is located outside the wear-resistant layer (101), and is made of metal plating with a thickness of 0.02-0.05 mm. Piston rod body (2), the piston rod body (2) is disposed inside the steel pipe body (1); A sealing ring (3) is embedded in one end of the steel pipe body (1) and is used in conjunction with the piston rod body (2).

2. The precision-rolled seamless steel pipe for a shock absorber piston rod according to claim 1, characterized in that, A transition layer is provided between the wear-resistant layer (101) and the steel pipe body (1). The transition layer is made of a material that has good bonding performance with both the wear-resistant layer (101) and the steel pipe body (1), and has a thickness of 0.05mm-0.2mm.

3. The precision-rolled seamless steel pipe for a shock absorber piston rod according to claim 1, characterized in that, The surface of the corrosion-resistant layer (102) is passivated to form a dense passivation film.

4. The precision-rolled seamless steel pipe for a shock absorber piston rod according to claim 1, characterized in that, A baffle plate (4) is fixedly connected to one end of the steel pipe body (1) and the piston rod body (2) at the opposite ends. A spring (5) is fixedly connected between the two baffle plates (4) and outside the steel pipe body (1) and the piston rod body (2).

5. A precision-rolled seamless steel pipe for a shock absorber piston rod according to claim 4, characterized in that, A connecting block (6) is fixedly connected to the side of each of the two baffles (4) that is far apart from each other, and a mounting base (7) is fixedly connected to the side of each of the two connecting blocks (6) that is far apart from each other.

6. A precision-rolled seamless steel pipe for a shock absorber piston rod according to claim 5, characterized in that, Two reinforcing ribs (8) are fixedly connected between both sides of the connecting block (6) and one side of the mounting base (7).

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