Carbon fiber diamagnetic corrosion-resistant piston rod

Abstract

The utility model discloses a carbon fiber diamagnetic corrosion-resistant piston rod which comprises a piston, an upper connector, a piston rod body and a piston fixing connector, the upper connector, the piston rod body and the piston fixing connector are integrally formed from top to bottom, the piston rod body is provided with a hollow cavity, and the inner end face of the hollow cavity protrudes from top to bottom to form continuous spiral reinforcing rib positions. The piston rod body comprises a base body layer, a bonding layer and an outer protection layer from inside to outside. The piston rod main body is made of the carbon fiber material instead of a conventional metal main body, and the hollow cavity with the spiral reinforcing rib position is designed in the piston rod main body, so that the weight of the piston rod can be reduced on the premise of ensuring enough rigidity and strength, the lightweight design of the piston rod is realized, and the service life of the piston rod is prolonged. And secondly, the outer protective layer is additionally arranged on the piston rod main body, and the material of the outer protective layer is insoluble in water, acid, alkali or organic solvent and has good rigidity, so that the oxidation resistance and the wear resistance can be improved, and the service life of the piston rod can be effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston rods, and particularly relates to a carbon fiber anti-magnetic and corrosion-resistant piston rod. Background Art

[0002] An actuating cylinder, also known as a hydraulic cylinder, is a common type of actuator in a hydraulic transmission system used to implement a working mechanism. The actuating cylinder mainly consists of components such as a cylinder body, a piston rod, and end covers, and the piston rod is the main moving component among them.

[0003] Currently, most piston rods are made of steel. With the continuous improvement of the aircraft lightweight requirement and the severe weight reduction demand for automotive components with the rise of new energy vehicles, the application of traditional steel piston rods has been greatly restricted due to their large weight. Secondly, steel materials cannot be used in environments with relatively large magnetism, etc. It is difficult to reduce their weight and make them suitable for different environments by relying on traditional structural optimization design and other methods. Therefore, it is necessary to start from the material aspect to achieve their lightening and applicability. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a carbon fiber anti-magnetic and corrosion-resistant piston rod to solve the above-mentioned problems.

[0005] The technical scheme adopted by the utility model is as follows: A carbon fiber anti-magnetic and corrosion-resistant piston rod includes a piston, and an upper joint, a piston rod main body, and a piston fixed joint integrally formed from top to bottom. The piston rod main body has a hollow cavity, and a continuous spiral reinforcing rib position protrudes from the inner end surface of the hollow cavity from top to bottom. The piston rod main body includes a matrix layer, an adhesive layer, and an outer protective layer from inside to outside.

[0006] In a preferred embodiment, a positioning platform integrally protrudes from the lower side of the piston rod main body. The outer diameter of the positioning platform is larger than the inner diameter of the piston. The piston is sleeved on the piston rod main body, and the piston abuts against the positioning platform.

[0007] In a preferred embodiment, the outer peripheral surface of the piston fixed joint is provided with positive and negative threads, and two nuts with opposite threads are threadedly installed on the piston fixed joint from top to bottom. The nut located at the upper end of the piston fixed joint tightly abuts against the piston.

[0008] In a preferred embodiment, a plurality of positioning keys protrude circumferentially from the upper end surface of the piston, and key holes for inserting the positioning keys are correspondingly opened at the bottom end of the positioning platform.

[0009] In a preferred embodiment, the matrix layer is made of carbon fiber material.

[0010] In a preferred embodiment, the adhesive layer is selected from high-temperature adhesives, and the thickness of the adhesive layer is 1 to 1.5 μm.

[0011] In a preferred embodiment, the outer protective layer is a protective coating formed by physical vapor deposition of BaSO4 or TiO2 particles, and the thickness of the outer protective layer is 2 to 3.5 μm.

[0012] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, a carbon fiber material is used to make the piston rod body, replacing the previous metal body, and a hollow cavity with a spiral reinforcing rib position is designed inside the piston rod body, which can reduce the weight of the piston rod while ensuring sufficient stiffness and strength, realizing the lightweight design of the piston rod;

[0014] 2. In the present utility model, an outer protective layer is added to the piston rod body. By utilizing the characteristics that its material is insoluble in water, acids, alkalis or organic solvents and has good rigidity, it can improve oxidation resistance and wear resistance, and can effectively ensure the service life of the piston rod;

[0015] 3. In the present utility model, the whole piston rod is made of a material with good anti-magnetic performance, and it can also be used in environments with large magnetism and other harsh environments, with stronger applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structural schematic diagram of the combination of the piston rod and the piston in the present utility model;

[0017] Figure 2 is a cross-sectional planar structural schematic diagram of the combination of the piston rod and the piston in the present utility model;

[0018] Figure 3 is a three-dimensional structural schematic diagram of the separation of the piston fixed joint and the nut in the present utility model;

[0019] Figure 4 is a layered structural schematic diagram of the piston rod in the present utility model.

[0020] Markings in the figure: 1 - piston rod body, 101 - matrix layer, 102 - adhesive layer, 103 - outer protective layer, 2 - upper joint, 3 - piston, 31 - positioning key, 4 - positioning table, 5 - nut, 6 - hollow cavity, 7 - spiral reinforcing rib position, 8 - piston fixed joint. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] In order to make the objectives, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0022] Referring to Figures 1-4 , a carbon fiber anti-magnetic and corrosion-resistant piston rod includes a piston 3 and an upper joint 2, a piston rod main body 1 and a piston fixed joint 8 integrally formed from top to bottom. The piston rod main body 1 has a hollow cavity 6. A continuous spiral reinforcing rib position 7 protrudes from the inner end surface of the hollow cavity 6 from top to bottom. The piston rod main body 1 includes a base layer 101, an adhesive layer 102 and an outer protective layer 103 from inside to outside. The base layer 101 is made of carbon fiber material. Using carbon fiber material to make the piston rod main body replaces the previous metal main body, and a hollow cavity 6 with a spiral reinforcing rib position 7 is designed in the piston rod main body, which can reduce the weight of the piston rod on the premise of ensuring sufficient stiffness and strength, and realizes the lightweight design of the piston rod.

[0023] Secondly, the carbon fiber material has the advantage of good anti-magnetic performance, which can also make the piston rod suitable for use in environments with large magnetism and other harsh environments, and has stronger applicability.

[0024] Furthermore, a positioning platform 4 integrally protrudes from the lower side of the piston rod main body 1. The outer diameter of the positioning platform 4 is larger than the inner diameter of the piston 3. The piston 3 is sleeved on the piston rod main body 1, and the piston 3 abuts against the positioning platform 4. A plurality of positioning keys 31 protrude circumferentially from the upper end surface of the piston 3. A key hole for inserting the positioning keys 31 is correspondingly opened at the bottom end of the positioning platform 4. The positioning platform 4 can assist in limiting the up and down installation position of the piston 3. At the same time, through the cooperation of the key hole and the positioning keys 31, the left and right positions of the piston 3 can also be assisted in limiting, avoiding self-deflection of the piston 3.

[0025] Furthermore, the outer peripheral surface of the piston fixed joint 8 is provided with positive and negative threads. Two nuts 5 with opposite threads are threadedly installed on the piston fixed joint 8 from top to bottom. The nut 5 located at the upper end of the piston fixed joint 8 abuts against the piston 3. Through the cooperation of the positive and negative threads and the two nuts 5, the overall connection strength can be increased, and the anti-loosening effect can be achieved, avoiding the nut 5 disengaging from the piston fixed joint 8 when the piston rod moves up and down, which affects the overall use effect.

[0026] Furthermore, the adhesive layer 102 is selected from high-temperature adhesives. The thickness of the adhesive layer 102 is 1-1.5 μm. The adhesive layer 102 is preferably bonded with high-temperature resistant epoxy resin, and the bonding strength can reach more than 20 MPa, but this is not limited herein.

[0027] Furthermore, the outer protective layer 103 is a protective coating formed by physical vapor deposition process using BaSO4 or TiO2 particles. The thickness of the outer protective layer 103 is 2 - 3.5 μm. Secondly, an outer protective layer is added to the piston rod body. By virtue of the characteristics that its material is insoluble in water, acids, alkalis or organic solvents and has good rigidity, it can improve oxidation resistance and wear resistance, and can effectively ensure the service life of the piston rod.

[0028] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A carbon fiber anti-magnetic and corrosion-resistant piston rod, characterized in that, It includes a piston and an upper joint, a piston rod body, and a piston fixing joint which are integrally formed from top to bottom. The piston rod body has a hollow cavity, and a continuous spiral reinforcing rib position protrudes from the inner end surface of the hollow cavity from top to bottom. The piston rod body includes a base layer, an adhesive layer, and an outer protective layer from inside to outside.

2. The carbon fiber anti-magnetic and corrosion-resistant piston rod according to claim 1, wherein: A positioning platform integrally protrudes from the lower side of the piston rod body. The outer diameter of the positioning platform is larger than the inner diameter of the piston. The piston is sleeved on the piston rod body, and the piston abuts against the positioning platform.

3. A carbon fiber anti-magnetic and corrosion-resistant piston rod according to claim 1, characterized in that: Positive and negative screw threads are provided on the outer peripheral surface of the piston fixing joint. Two nuts with opposite threads are threadedly installed on the piston fixing joint from top to bottom. The nut located at the upper end of the piston fixing joint tightly abuts against the piston.

4. The carbon fiber anti-magnetic and corrosion-resistant piston rod according to claim 2, characterized in that: A plurality of positioning keys protrude circumferentially from the upper end surface of the piston. A key hole for inserting the positioning key is correspondingly formed at the bottom end of the positioning platform.

5. The carbon fiber anti-magnetic and corrosion-resistant piston rod according to claim 1, characterized in that: The base layer is made of carbon fiber material.

6. The carbon fiber anti-magnetic and corrosion-resistant piston rod according to claim 1, characterized in that: The adhesive layer is selected from high-temperature adhesives, and the thickness of the adhesive layer is 1 - 1.5 μm.

7. The carbon fiber anti-magnetic and corrosion-resistant piston rod according to claim 1, wherein: The outer protective layer is a protective coating formed by physical vapor deposition process using BaSO4 or TiO2 particles, and the thickness of the outer protective layer is 2 - 3.5 μm.

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