Blind hole type lightweight piston rod for hydraulic cylinder

Abstract

A kind of hydraulic cylinder blind hole type lightweight piston rod, including cylinder, piston rod is equipped in cylinder, the one end of piston rod is equipped with piston and guide sleeve, the other end of piston rod is connected with ear ring, piston rod is hollow rod body, the one end of piston rod connection ear ring is equipped with lightweight structure filling layer, and ear ring is lightweight through ear structure.The hydraulic cylinder blind hole type lightweight piston rod of the utility model under the premise of guaranteeing strength, rigidity and durability, greatly reduces the weight of piston rod compared with solid steel piston rod, effectively reduces system inertia, improves response speed, reduces energy consumption, improves simultaneously hydraulic cylinder safety and reliability, reduces life cycle cost, solve the problem of piston rod weight, high energy consumption, slow response speed in prior art.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically a blind-hole lightweight piston rod for hydraulic cylinders. Background Technology

[0002] Hydraulic cylinders, as key actuators in hydraulic systems, are widely used in various mechanical equipment due to their high power density, precise control performance, and stable and reliable operation. The piston rod is the core component of the hydraulic cylinder, directly bearing the axial load, reciprocating impact, and friction of the hydraulic system. Its structural design, material selection, and manufacturing process not only determine the hydraulic cylinder's load-bearing capacity, motion accuracy, and service life, but also profoundly affect the energy efficiency, response speed, and overall operating cost of the entire hydraulic system.

[0003] Traditional piston rods are mostly made of solid alloy steel and spliced ​​welding. Although they meet the requirements for strength and rigidity, they have the disadvantage of being heavy. This results in large inertia and slow response speed in the hydraulic system, and also increases the energy consumption of the system, which cannot meet the needs of mechanical equipment to develop towards high efficiency and energy saving.

[0004] As global industries increasingly demand energy conservation, emission reduction, high-efficiency operation, and lightweight equipment, fields such as engineering machinery and aerospace have set higher standards for piston rod performance: achieving significant weight reduction, reducing system inertia, improving response speed, reducing energy and material consumption, and extending service life while ensuring or even improving strength, stiffness, fatigue resistance, and corrosion resistance. Therefore, developing a piston rod structure that is structurally sound, reliable in performance, and significantly lightweight has become a key requirement for addressing existing technological challenges and driving the upgrading of hydraulic system technology, possessing significant engineering application value and market prospects. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a lightweight blind-hole piston rod for hydraulic cylinders with simple structure and good performance.

[0006] This utility model is achieved by the following technical solution: a blind-hole lightweight piston rod for a hydraulic cylinder, including a cylinder barrel, a piston rod and a guide sleeve are provided inside the cylinder barrel, a piston is provided at one end of the piston rod, and an earring is connected to the other end of the piston rod. The piston rod is a hollow rod body, and a lightweight structural filling layer is provided at the end of the piston rod connected to the earring. The earring is a lightweight through-type earring structure.

[0007] Furthermore, the hollow rod body is provided with an axial blind hole, and the lightweight structural filling layer is disposed at one end of the axial through hole opening.

[0008] The wall thickness of the hollow rod is 10%–15% of the outer diameter of the piston rod.

[0009] The lightweight structural filler layer has radially provided through holes for weight reduction.

[0010] The lightweight structural filling layer is tightly fitted to the inner wall of the hollow rod, and the axial length of the lightweight structural filling layer is consistent with the width of the lightweight through-type earring structure.

[0011] The lightweight through-type earring structure is through-type in both the horizontal and vertical directions.

[0012] The hollow rod and lightweight through-ear structure are made of high-strength alloy steel, and the lightweight structure filling layer is made of aluminum alloy through additive manufacturing process.

[0013] The present invention has the following advantages: The hydraulic cylinder of the present invention uses a blind-hole type lightweight piston rod, which greatly reduces the weight of the piston rod compared with a solid steel piston rod while ensuring strength, rigidity and durability. This effectively reduces system inertia, improves response speed and reduces energy consumption, while improving the safety and reliability of the hydraulic cylinder and reducing the total life cycle cost. It solves the problems of large piston rod weight, high energy consumption and slow response speed in the prior art. Attached Figure Description

[0014] The accompanying drawings, as part of this utility model, are used to provide a further understanding of the present utility model. The illustrative embodiments and descriptions of the present utility model are used to explain the present utility model, but do not constitute an undue limitation of the present utility model. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0015] In the attached diagram: Figure 1 This is a schematic diagram of the structure of the hydraulic cylinder of this utility model; Figure 2 This is a schematic diagram of the piston rod of this utility model.

[0016] In the diagram: 1. Piston, 2. Piston rod, 3. Cylinder, 4. Guide sleeve, 2.1. Lightweight through-type earring structure, 2.2. Lightweight structural filling layer, 2.3. Hollow rod body, 2.4. Thread.

[0017] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0019] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figures 1 to 2 The diagram shows a blind-hole type lightweight piston rod for a hydraulic cylinder, including a cylinder barrel 3, a piston rod 2 and a guide sleeve 4 inside the cylinder barrel 3, a piston 1 at one end of the piston rod 2, and an earring connected to the other end of the piston rod 2. The piston rod 2 is a hollow rod body 2.3, and a lightweight structural filling layer 2.2 is provided at the end of the piston rod 2 connected to the earring. The earring is a lightweight through-type earring structure 2.1. In this utility model, a lightweight blind-hole piston rod for hydraulic cylinders is a hollow rod with a piston and a lightweight through-type lug structure connected to both ends. The connection end to the lightweight through-type lug structure also has a lightweight filler layer. This lightweight design achieves piston rod weight reduction while ensuring sufficient strength, rigidity, and durability, reducing system inertia, improving response speed, and reducing energy consumption. Additionally, the piston rod has connectors at both ends specifically for connecting to the piston or external load. These connectors have 2.4 threads and can be configured with internal or external threaded holes depending on the connection method. The threaded connection ensures the reliability and stability of the connection with related components, preventing loosening during operation. During operation, hydraulic energy is converted into the piston's mechanical energy and transmitted to the external load through the piston rod. Due to the lightweight design of the piston rod, the system inertia is low, the response is rapid, and energy consumption is significantly reduced. Simultaneously, the high-strength structural design ensures safety and stability during operation.

[0022] like Figures 1 to 2The invention discloses a lightweight piston rod for a hydraulic cylinder with a blind hole design. The hollow rod body 2.3 has an axial blind hole, and the lightweight structural filling layer 2.2 is located at one end of the axial through-hole opening. The wall thickness of the hollow rod body 2.3 is 10%-15% of the outer diameter of the piston rod 2. The hollow rod body 2.3 is made of high-strength alloy steel. This invention's hollow rod body, made of high-strength alloy steel, is formed using an integrated manufacturing process to ensure no splicing defects. It has an internal axial blind hole, and the wall thickness of the hollow rod body is strictly controlled to 10%-15% of the outer diameter of the piston rod. This thickness design ensures both the structural strength of the rod body and maximizes the lightweight effect.

[0023] like Figures 1 to 2 The invention discloses a lightweight piston rod for a hydraulic cylinder with a blind hole design. The lightweight structural filler layer 2.2 has radially arranged through holes for weight reduction. The lightweight structural filler layer 2.2 is tightly fitted to the inner wall of the hollow rod body 2.3, and the axial length of the filler layer 2.2 is consistent with the width of the lightweight through-hole earring structure 2.1. The lightweight structural filler layer 2.2 is made of aluminum alloy using an additive manufacturing process. This invention utilizes aluminum alloy as the lightweight material for the lightweight structural filler layer, which is precisely filled into the axial blind hole of the hollow rod body using an additive manufacturing process. During filling, the filler layer is ensured to be tightly fitted to the inner wall of the rod body without gaps, thereby enhancing the overall rigidity of the rod body. This further reduces weight while enhancing the overall rigidity and stability of the rod body, preventing deformation of the hollow structure under stress.

[0024] like Figures 1 to 2 The diagram illustrates a lightweight, blind-hole piston rod for a hydraulic cylinder. The lightweight, through-hole earring structure 2.1 is through-hole in both the transverse and longitudinal directions. The lightweight, through-hole earring structure 2.1 is made of high-strength alloy steel. This lightweight, through-hole earring structure is made of high-strength alloy steel, and its transverse and longitudinal directions are designed as through-hole structures. Compared to traditional non-through-hole earrings, it further reduces structural weight while ensuring connection strength, and also facilitates connection and installation with external loads.

[0025] The present invention provides a blind-hole type lightweight piston rod for hydraulic cylinders, which has the following advantages: 1. Significant weight reduction effect: Through the synergistic design of hollow blind hole rod structure, lightweight through-hole ear structure and aluminum alloy filling layer, the weight of piston rod is greatly reduced compared with solid steel piston rod of the same outer diameter and length. This significantly reduces the inertia of hydraulic system, effectively improves system response speed, and reduces energy consumption, which is in line with the development trend of high efficiency and energy saving.

[0026] 2. Improved structural strength and reliability: The rod body and lug structure are made of high-strength alloy steel, combined with integrated manufacturing process and reasonable wall thickness design, replacing the traditional solid alloy steel and spliced ​​welded piston rod. This not only significantly improves the pressure resistance but also avoids the weld defects that may exist in welded structures, greatly improving the safety and reliability of the hydraulic cylinder.

[0027] 3. Controllable cost and extended lifespan: Although high-strength alloy steel, aluminum alloy and other materials and advanced processes such as additive manufacturing and integrated manufacturing are adopted, the amount of expensive materials used is reduced by optimizing the structural design, so that the overall manufacturing cost is kept within a controllable range; at the same time, the improvement of structural stability and the reduction of defects extend the service life of the piston rod, thereby reducing the total life cycle cost of the equipment.

[0028] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0029] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features found in other embodiments but not others, combinations of features from different embodiments are also within the scope of protection of this invention and form different embodiments. For example, in the embodiments described above, those skilled in the art can use them in combination based on known technical solutions and the technical problems to be solved by this application.

[0030] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A lightweight blind-hole piston rod for a hydraulic cylinder, characterized in that: Includes a cylinder (3), inside which is provided a piston rod (2) and a guide sleeve (4). One end of the piston rod (2) is provided with a piston (1), and the other end of the piston rod (2) is connected to an earring. The piston rod (2) is a hollow rod body (2.3). The end of the piston rod (2) connected to the earring is provided with a lightweight structural filling layer (2.2). The earring is a lightweight through-type earring structure (2.1).

2. The lightweight blind-hole piston rod for a hydraulic cylinder as described in claim 1, characterized in that: The hollow rod (2.3) is provided with an axial blind hole, and the lightweight structural filling layer (2.2) is provided at one end of the axial through hole opening.

3. A lightweight blind-hole piston rod for a hydraulic cylinder as described in claim 1, characterized in that: The wall thickness of the hollow rod (2.3) is 10%-15% of the outer diameter of the piston rod (2).

4. A lightweight blind-hole piston rod for a hydraulic cylinder as described in claim 1, characterized in that: The lightweight structural filler layer (2.2) has radial through-holes for weight reduction.

5. A lightweight blind-hole piston rod for a hydraulic cylinder as described in claim 1, characterized in that: The lightweight structural filling layer (2.2) is tightly fitted to the inner wall of the hollow rod (2.3), and the axial length of the lightweight structural filling layer (2.2) is consistent with the width of the lightweight through earring structure (2.1).

6. A lightweight blind-hole piston rod for a hydraulic cylinder as described in claim 1, characterized in that: The lightweight through-type earring structure (2.1) is through-type in both the horizontal and vertical directions.

7. A lightweight blind-hole piston rod for a hydraulic cylinder as described in claim 1, characterized in that: The hollow rod (2.3) and the lightweight through-ear structure (2.1) are made of high-strength alloy steel, and the lightweight structure filling layer (2.2) is made of aluminum alloy through additive manufacturing process.

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