A carbon fiber reinforced hollow spiral rib automotive shock absorber piston rod

Abstract

This invention relates to the field of shock absorber piston rods, and more particularly to a carbon fiber reinforced hollow spiral rib automotive shock absorber piston rod. The shock absorber piston rod is assembled onto the vehicle body via a mounting component located at its bottom. Assembly mechanisms are provided at the corners of the mounting component. Each assembly mechanism includes a main screw, a slanted post, and a secondary screw. The main screw passes vertically through the mounting component to achieve a fixed assembly with the vehicle body. The slanted post passes obliquely through the main screw to lock it in place. The secondary screw passes through the slanted post to fix it in place. In this invention, the shock absorber piston rod effectively reduces vehicle vibration. The multi-stage locking assembly mechanism, consisting of the main screw, slanted post, and secondary screw, solves the problem of traditional bolts easily loosening under vibration, providing multiple anti-loosening guarantees for the main screw. This improves the vibration resistance stability of the connection point between the shock absorber piston rod and the vehicle body, thereby ensuring vehicle handling safety.

Description

Technical Field

[0001] This invention relates to the field of shock absorber piston rod technology, and more particularly to a carbon fiber reinforced hollow spiral rib automotive shock absorber piston rod. Background Technology

[0002] The piston rod, a core component of automotive shock absorbers, is traditionally made of solid alloy steel. While this design ensures strength, it results in a large weight, which is not conducive to reducing unsprung mass and improving vehicle handling and fuel efficiency.

[0003] Currently, shock absorber assemblies are generally connected to the vehicle body via bolts. During vehicle operation, this connection point continuously endures high-frequency, multi-directional vibrations and impacts. Under these harsh conditions, traditional bolts are prone to loosening due to microscopic slippage and preload decay. This not only produces abnormal noises but also leads to wheel misalignment, severely affecting handling stability and safety. Therefore, there is an urgent need for a highly stable carbon fiber reinforced hollow helical rib automotive shock absorber piston rod. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a carbon fiber reinforced hollow spiral rib automotive shock absorber piston rod.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A carbon fiber reinforced hollow spiral rib automotive shock absorber piston rod includes a shock absorber piston rod extending axially and having a hollow cylinder, the hollow cylinder comprising at least the following components from the inside to the outside: The inner layer structure is composed of continuous high-modulus carbon fibers laid up in a direction of 0° to ±10° relative to the piston rod axis, and it constitutes the main body for bearing axial loads. The outer reinforcing structure is formed by continuously winding high-strength carbon fibers at a predetermined helical angle and with a variable pitch around the outer peripheral surface of the inner structure to form helical protrusions. The pitch of the spiral ribs varies along the axial direction of the shock absorber piston rod. The pitch is smallest and the rib density is largest in the middle region of the rod body, which corresponds to the stress concentration during the working stroke of the shock absorber piston rod. The pitch gradually increases and the rib density gradually decreases at both ends of the shock absorber piston rod.

[0006] Furthermore, in a preferred configuration, the shock absorber piston rod is mounted on the vehicle body via a mounting component located at its bottom. Each corner of the mounting component is equipped with an assembly mechanism. The assembly mechanism includes a main screw, a slanted post, and a secondary screw. The main screw is vertically inserted into the mounting component to achieve a fixed assembly with the vehicle body. The slanted post is obliquely inserted into the main screw to lock it in place. The secondary screw is inserted into the slanted post to achieve a fixed assembly with the slanted post.

[0007] In addition, in a preferred configuration, each corner of the mounting component is provided with a vertical main screw hole, the main screws are adapted to engage and pass through the main screw hole, and a main washer is provided at the top of each main screw hole.

[0008] Furthermore, in a preferred configuration, each of the mounting components has a slanted seat fixedly installed on one side of the top of the main screw hole, and each slanted seat has an slanted cavity.

[0009] Furthermore, in a preferred configuration, all the inclined cavities are adapted to pass through the main screw hole, and the inclined pins are adapted to move within the inclined cavities.

[0010] Furthermore, in a preferred configuration, each of the main screws has an inclined anti-loosening cavity extending through it, and the anti-loosening cavity is adapted, aligned, and connected with the inclined column.

[0011] Furthermore, in a preferred configuration, each of the inclined columns has a female and auxiliary screw hole through which it passes, and the auxiliary screws are adapted to engage and pass through the female and auxiliary screw holes.

[0012] Furthermore, in a preferred configuration, a secondary washer is provided on the outside of the female secondary screw hole on the inclined post, and the secondary screw is engaged with the secondary washer and assembled inside the inclined post.

[0013] Furthermore, in a preferred configuration, each end of the inclined cavity within the mounting component is provided with a secondary screw hole, which is adapted and aligned with the primary screw hole, and the secondary screw is adapted and engaged with both the secondary screw hole and the primary screw hole.

[0014] Furthermore, in a preferred configuration, the inclined post has a chamfer on the side facing the main screw hole, and the radius of the chamfer is 45°.

[0015] The beneficial effects of this invention are as follows: the shock absorber piston rod can effectively reduce the vibration of the car. The multi-stage locking assembly mechanism composed of the main screw, the inclined column and the auxiliary screw can solve the problem of traditional bolts being easy to loosen under vibration. The main screw is provided with multiple anti-loosening protection, thereby improving the vibration resistance stability of the connection point between the shock absorber piston rod and the vehicle body, thus ensuring the vehicle's handling safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a carbon fiber reinforced hollow spiral rib automotive shock absorber piston rod proposed in this invention; Figure 2 This is a schematic diagram of the assembly mechanism proposed in this invention; Figure 3 for Figure 2 A schematic diagram of the internal structure of the assembly mechanism in the diagram; Figure 4 for Figure 3 An exploded view of the assembly mechanism in the diagram; Figure 5 for Figure 3 A schematic diagram of the structure after the main screw, inclined post, and washer are hidden; Figure 6 This is a schematic diagram of the main screw proposed in this invention; Figure 7 This is a schematic diagram of the exploded structure between the inclined column and the secondary screw proposed in this invention; Figure 8 This is a schematic diagram of the inclined column structure proposed in this invention; Figure 9 The invention proposed In the diagram: 1. Shock absorber piston rod, 10. Hollow cylinder, 101. Inner layer structure, 102. Outer layer reinforcement structure, 103. Rib, 2. Mounting part, 21. Main screw hole, 22. Slanted seat, 221. Slanted cavity, 222. Sub-screw hole, 3. Main screw, 31. Anti-loosening cavity, 32. Main washer, 4. Slanted column, 41. Female sub-screw hole, 42. Chamfer, 5. Sub-screw, 51. Sub-washer. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Reference Figure 1-8 A carbon fiber reinforced hollow spiral rib automotive shock absorber piston rod includes a shock absorber piston rod 1. The core of the shock absorber piston rod 1 is its hollow cylinder 10, which is integrally molded from composite materials. This hollow cylinder 10 is not a simple tube with uniform wall thickness, but has a carefully designed gradient material and variable geometry reinforcement structure.

[0019] The wall of the hollow cylinder 10 consists of at least two layers from the inside out: The inner layer structure 101 constitutes the main skeleton of the piston rod that bears axial tensile and compressive loads. The inner layer structure 101 is made of continuous high-modulus carbon fibers, such as M-series carbon fibers with a modulus of 300 GPa or higher, through prepreg layup or fiber winding processes. During layup, the fiber direction is at a small angle of 0° to ±10° relative to the piston rod axis, i.e., near-axial layup. This layup method improves the excellent axial stiffness and strength of the high-modulus carbon fibers, providing the piston rod with stable core capabilities against crushing and tensile stresses.

[0020] An outer reinforcing structure 102 is integrally formed on the outer peripheral surface of the inner layer structure 101. The outer reinforcing structure 102 is made of continuous high-strength carbon fibers, such as T-series carbon fibers with a tensile strength of 4000 MPa or higher, wound at a helical angle of 15° to 45°. The winding is not of constant pitch, but of variable pitch continuous winding, thereby forming helical protruding ribs 103 on the outer surface of the inner layer structure 101.

[0021] The pitch design of the helical ribs 103 follows the actual force characteristics of the piston rod. Continuous helical grooves are naturally formed between the helical ribs 103. These grooves not only reduce weight but also improve stability and durability.

[0022] The shock absorber piston rod 1 is mounted on the vehicle body via a mounting piece 2 located at its bottom. Mounting mechanisms are provided at the corners of the mounting piece 2. Each mounting mechanism includes a main screw 3, a slanted post 4, and a secondary screw 5. The main screw 3 is vertically inserted into the mounting piece 2 for fixed assembly with the vehicle body. The slanted post 4 is obliquely inserted into the main screw 3 for locking. The secondary screw 5 is inserted into the slanted post 4 for fixed assembly with the slanted post 4.

[0023] The mounting component 2 has vertically protruding main screw holes 21 at its corners. The main screws 3 are fitted and engaged within the main screw holes 21, and a main washer 32 is provided at the top of each main screw hole 21. The main washer 32 further enhances the assembly stability of the main screws 3, ensuring that the main screws 3 can be stably engaged and assembled within the main screw holes 21.

[0024] Each of the mounting components 2 has a slanted seat 22 fixedly installed on one side of the main screw hole 21, and each slanted seat 22 has a slanted cavity 221. The slanted cavity 221 is adapted to pass through the main screw hole 21, and the slanted column 4 is adapted to move within the slanted cavity 221.

[0025] Each main screw 3 has an inclined anti-loosening cavity 31 extending through it. The anti-loosening cavity 31 is adapted, aligned, and connected with the inclined cavity 221 and is adapted to the inclined post 4. By locking the inclined post 4 in the anti-loosening cavity 31, the assembly stability of the main screw 3 can be further enhanced, so as to ensure that the main screw 3 can be stably engaged and assembled in the main screw hole 21.

[0026] Each inclined post 4 has a female auxiliary screw hole 41 extending through it, and each auxiliary screw 5 is fitted and engaged within the female auxiliary screw hole 41. An auxiliary washer 51 is provided on the outside of the female auxiliary screw hole 41 on the inclined post 4, and the auxiliary screw 5 is engaged and assembled within the inclined post 4 through the auxiliary washer 51. The auxiliary washer 51 ensures that the auxiliary screw 5 can be stably engaged and assembled within the male auxiliary screw hole 222 and the female auxiliary screw hole 41, thereby ensuring the fixing stability of the inclined post 4 and further enhancing the assembly stability of the main screw 3, ensuring that the main screw 3 can be stably engaged and assembled within the main screw hole 21.

[0027] Among them, each of the mounting parts 2 has a sub-screw hole 222 at the end of the inclined cavity 221. The sub-screw holes 222 are all adapted and aligned with the female sub-screw hole 41, and the sub-screws 5 are adapted and engaged with the sub-screw holes 222 and the female sub-screw holes 41.

[0028] The inclined post 4 has a chamfer 42 on the side facing the main screw hole 21, and the radius of the chamfer 42 is 45°. The chamfer 42 on the inclined post 4 ensures that the inclined post 4 will not interfere with the main screw 3 during installation.

[0029] In this invention, the shock absorber piston rod 1 is made of carbon fiber composite material, which achieves significant weight reduction through its hollow structure, thus reducing unsprung mass. The inner and outer walls of the rod are designed with continuous helical ribs to improve the rod's resistance to crushing, bending stiffness, and torsional performance under complex alternating loads. It is worth noting that the specific structure and operation of the shock absorber piston rod 1 are existing technologies, common knowledge known to those skilled in the art, and not related to the installation stability issue addressed in this technical solution; therefore, they will not be elaborated upon further in this invention.

[0030] Furthermore, when installing the shock absorber piston rod 1, simply place the mounting part 2 on the vehicle body and ensure that the main screw holes 21 are aligned with the vehicle body.

[0031] Then, simply pull the inclined column 4 outwards, and then insert the main screws 3 into the main screw holes 21. In this way, the main screws 3 can be used to achieve a rigid connection between the mounting part 2 and the vehicle body.

[0032] After all the main screws 3 are installed, the anti-loosening cavities 31 on the main screws 3 are adapted and connected to the inclined cavities 221. Then, the user only needs to insert the inclined pins 4 into the inclined cavities 221, thereby fixing the main screws 3 through the inclined pins 4, thus improving the installation stability of the main screws 3 and preventing the main screws 3 from falling off.

[0033] Finally, the user only needs to insert the secondary screw 5 into the inclined column 4. At this time, the secondary screw 5 is engaged in the secondary screw hole 222 and the female secondary screw hole 41. In this way, the inclined column 4 can be fixed by the secondary screw 5, thereby ensuring the stability of the inclined column 4 and further enhancing the assembly stability of the main screw 3, so as to ensure that the main screw 3 can be stably engaged in the main screw hole 21.

[0034] Furthermore, when it is necessary to disassemble the shock absorber piston rod 1, simply remove the auxiliary screw 5 first, then pull out the inclined column 4, and finally remove the main screw 3. This will allow the shock absorber piston rod 1 to be disassembled.

[0035] In this invention, the shock absorber piston rod 1 can effectively reduce the vibration of the car. The multi-stage locking assembly mechanism composed of the main screw 3, the inclined column 4 and the auxiliary screw 5 can solve the problem of traditional bolts being easy to loosen under vibration, so as to provide multiple anti-loosening protection for the main screw 3, thereby improving the vibration resistance stability of the connection point between the shock absorber piston rod 1 and the vehicle body, thus ensuring the vehicle's handling safety.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A carbon fiber reinforced hollow spiral rib automotive shock absorber piston rod, comprising a shock absorber piston rod (1), the shock absorber piston rod (1) extending axially and having a hollow cylinder (10), the hollow cylinder (10) comprising, from the inside to the outside, at least: The inner layer structure (101) is made of continuous high-modulus carbon fibers laid up in a direction of 0° to ±10° relative to the piston rod axis, and it constitutes the main body for bearing axial loads. The outer layer reinforcement structure (102) is formed by continuously high-strength carbon fibers wound around the outer peripheral surface of the inner layer structure (101) at a predetermined helical angle and with a variable pitch to form helical protrusions (103). The pitch of the spiral ribs (103) varies along the axial direction of the shock absorber piston rod (1). The pitch is smallest and the rib density is largest in the middle part of the rod body where stress is concentrated during the working stroke of the shock absorber piston rod (1). The pitch gradually increases and the rib density gradually decreases at both ends of the shock absorber piston rod (1).

2. The piston rod of a carbon fiber reinforced hollow spiral rib automotive shock absorber according to claim 1, characterized in that, The shock absorber piston rod (1) is mounted on the vehicle body via a mounting part (2) provided at its bottom. The mounting part (2) is characterized in that an assembly mechanism is provided at each corner of the mounting part (2). The assembly mechanism includes a main screw (3), a slanted column (4), and a secondary screw (5), which cooperate with each other to lock together. The main screw (3) is vertically inserted into the mounting part (2) to achieve a fixed assembly with the vehicle body. The inclined column (4) is inclinedly inserted into the main screw (3) to achieve a locking of the main screw (3). The auxiliary screw (5) is inserted into the inclined column (4) to achieve a fixed assembly of the inclined column (4).

3. The piston rod of a carbon fiber reinforced hollow spiral rib automotive shock absorber according to claim 2, characterized in that, The mounting component (2) has vertically opened main screw holes (21) at its corners. The main screws (3) are adapted to mesh and pass through the main screw holes (21), and the top of the main screw holes (21) is provided with main washers (32).

4. The piston rod of a carbon fiber reinforced hollow spiral rib automotive shock absorber according to claim 2, characterized in that, Each of the mounting components (2) has a slant seat (22) fixedly installed on one side of the top of the main screw hole (21), and each slant seat (22) has a slant cavity (221) inside.

5. The piston rod of a carbon fiber reinforced hollow spiral rib automotive shock absorber according to claim 4, characterized in that, The inclined cavities (221) are all adapted to pass through the main screw hole (21), and the inclined column (4) is adapted to move within the inclined cavity (221).

6. The piston rod of a carbon fiber reinforced hollow spiral rib automotive shock absorber according to claim 5, characterized in that, Each of the main screws (3) has an inclined anti-loosening cavity (31) through it. The anti-loosening cavity (31) is adapted, aligned and connected with the inclined cavity (221) and adapted with the inclined column (4).

7. The piston rod of a carbon fiber reinforced hollow spiral rib automotive shock absorber according to claim 2, characterized in that, Each of the inclined columns (4) has a female and auxiliary screw hole (41) through it, and the auxiliary screws (5) are adapted to be engaged and inserted into the female and auxiliary screw hole (41).

8. The piston rod of a carbon fiber reinforced hollow spiral rib automotive shock absorber according to claim 7, characterized in that, A secondary washer (51) is provided on the outside of the female secondary screw hole (41) on the inclined column (4), and the secondary screw (5) is engaged and assembled in the inclined column (4) through the secondary washer (51).

9. The piston rod of a carbon fiber reinforced hollow spiral rib automotive shock absorber according to claim 8, characterized in that, The mounting component (2) has a sub-screw hole (222) at the end of the inclined cavity (221). The sub-screw hole (222) is adapted and aligned with the female sub-screw hole (41), and the sub-screw (5) is adapted and engaged with the sub-screw hole (222) and the female sub-screw hole (41).

10. The piston rod of a carbon fiber reinforced hollow spiral rib automotive shock absorber according to claim 7, characterized in that, The inclined column (4) has a chamfer (42) on the side facing the main screw hole (21), and the radius of the chamfer (42) is 45°.

Images