Suspension arm oil pipe stroke amplifying mechanism

Abstract

The utility model relates to the technical field of cranes, and provides a suspension arm oil pipe stroke amplifying mechanism which comprises an expansion hydraulic cylinder assembly which comprises a base and a hydraulic cylinder installed on the base. The inner arm is driven by a hydraulic cylinder to stretch out and draw back; the oil pipe stroke amplification assembly comprises an oil pipe protection sleeve, an oil pipe, a first synchronous roller and a second synchronous roller. The first synchronous roller and the second synchronous roller which synchronously advance along with the inner arm are arranged, the action process of the first synchronous roller and the second synchronous roller is similar to that of an advancing movable pulley, on the premise that the actual length of an oil pipe is not obviously increased, the working stroke of the hydraulic cylinder driving the inner arm can be met, and pressure loss caused by an overlong oil pipe is reduced to balance the length of an oil supply pipe and pressure loss.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a boom oil pipe stroke amplification mechanism. Background Art

[0002] Cranes are widely used in construction, transportation, logistics loading and unloading, port operations, installation and handling of large equipment, etc. Cranes are usually equipped with retractable booms to provide the necessary flexibility and extension capabilities to adapt to different lifting heights and span requirements.

[0003] Most crane booms are driven by hydraulic cylinders, with oil supply pipes transporting hydraulic oil from the pump to the cylinders. To prevent the oil supply pipes from being too hot due to being near heat sources or exposed to sunlight, they are typically designed to be inside the boom. However, due to the frequent extension and retraction of crane booms, existing oil supply pipe layouts often present problems, including:

[0004] An unreasonable bend radius in the oil supply pipe can cause stress concentration inside the pipe, leading to pipe deformation or rupture. Improper fixing or improper layout of the oil supply pipe can cause vibration during hydraulic oil flow or accumulation of impurities in the hydraulic oil, loosening the pipe joints, causing pipe wall fatigue, or even blockage, affecting the normal operation of the hydraulic system. Friction or interference between the oil supply pipe and the boom or other components can cause wear or damage.

[0005] In addition, the design of the oil supply line length has always been a problem. An oil supply line that is too short cannot meet the working requirements of the hydraulic cylinder, and an oil supply line that is too long will increase pressure loss and reduce the efficiency of the hydraulic system. Utility Model Content

[0006] In order to solve the problems existing in the background technology, the utility model provides a boom oil pipe stroke amplification mechanism, which includes:

[0007] An extended hydraulic cylinder assembly, comprising a base and a hydraulic cylinder mounted on the base;

[0008] An inner arm, the inner arm being driven by a hydraulic cylinder to extend and retract;

[0009] The oil pipe stroke amplification assembly includes an oil pipe protective sleeve, an oil pipe, a first synchronous roller and a second synchronous roller; the oil pipe protective sleeve is fixedly connected to the base; the oil pipe protective sleeve is a hollow structure, and the oil pipe is installed in the hollow structure; the first support roller and the second support roller are fixedly installed on the oil pipe protective sleeve;

[0010] A first synchronous roller and a second synchronous roller are fixedly connected to the inner arm;

[0011] The oil pipe includes a first layer of oil pipe and a second layer of oil pipe. The first layer of oil pipe passes around the first synchronous roller, the first support roller and the second support roller, and is connected to the base through the oil pipe protection sleeve.

[0012] The second layer of oil pipe passes around the second synchronous roller, the first support roller and the second support roller, and is connected to the base through the oil pipe protection sleeve.

[0013] In a preferred solution, the first layer of oil pipes between the first synchronous roller and the first support roller is in a horizontal state.

[0014] In a preferred solution, the second layer of oil pipe between the second synchronous roller and the first support roller is in a horizontal state.

[0015] In a preferred solution, the interval between the first synchronous roller and the second synchronous roller is 3 cm-8 cm.

[0016] In a preferred solution, the interval between the first supporting roller and the second supporting roller is 4 cm-9 cm.

[0017] The beneficial effects achieved by the utility model are:

[0018] First, the utility model is provided with a first synchronous roller and a second synchronous roller that move synchronously with the inner arm. The movement process of the first synchronous roller and the second synchronous roller is similar to that of the moving pulley. It can meet the working stroke of the hydraulic cylinder driving the inner arm without significantly increasing the actual length of the oil pipe, reduce the pressure loss caused by the excessively long oil pipe, and balance the length of the oil supply pipe and the pressure loss.

[0019] Second, the utility model is provided with an oil pipe stroke amplification assembly, and the oil pipe is dragged and advanced under the guidance of the first synchronous roller, the first support roller, the second support roller and the oil pipe protective cover, thereby ensuring a reasonable bending radius of the oil pipe during the extension and retraction of the boom, reducing stress concentration inside the pipeline, effectively preventing deformation or rupture of the oil pipe, and improving the service life of the oil pipe and the stability of the system.

[0020] Third, the design of the oil pipe protective cover effectively isolates the oil pipe from direct contact with the boom or other components, preventing wear and damage. It also avoids possible interference problems in the oil pipe layout and improves the reliability and safety of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the oil pipe stroke amplification assembly and the extended hydraulic cylinder assembly;

[0023] Figure 3 It is a schematic diagram of the extended hydraulic cylinder assembly structure and the oil pipe protection sleeve structure;

[0024] Figure 4 It is a schematic diagram of the oil pipeline layout structure;

[0025] Figure 5 yes Figure 2 Schematic diagram of the upward perspective structure.

[0026] Numbers in the figure:

[0027] 2. Inner arm; 3. Extended hydraulic cylinder assembly; 31. Hydraulic cylinder; 33. Base; 5. Oil pipe stroke amplification assembly; 51. Oil pipe; 511. First layer of oil pipe; 512. Second layer of oil pipe; 52. Oil pipe protective cover; 521. First support roller; 522. Second support roller; 53. First synchronous roller; 54. Second synchronous roller. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely examples. The present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Reference Figure 1-Figure 5 The present invention's boom oil pipe 51 stroke amplification mechanism primarily comprises three components: an extension hydraulic cylinder assembly 3, an inner arm 2, and an oil pipe stroke amplification assembly 5. The extension hydraulic cylinder assembly 3, consisting of a base 33 and a hydraulic cylinder 31 mounted thereon, provides power output. The inner arm 2 changes length through the extension and retraction of the hydraulic cylinder 31, satisfying the boom's telescopic requirements. The oil pipe stroke amplification assembly 5, the core component of the invention, comprises an oil pipe protective sleeve 52, an oil pipe 51, a first synchronous roller 53, a second synchronous roller 54, and first and second support rollers 521 and 522.

[0030] The oil pipe protective cover 52 is a hollow structure, fixed to the base 33 and containing the oil pipe 51. The cover not only provides physical protection for the oil pipe 51 but also forms a guide path, ensuring the orderly movement of the oil pipe 51 during boom extension and retraction. The first and second support rollers 521 and 522 attached to the cover serve as auxiliary guides for the oil pipe 51, reducing friction during rolling.

[0031] The oil pipe 51 is designed as a two-layer structure: a first layer of oil pipe 511 and a second layer of oil pipe 512. These layers respectively pass around the first synchronous roller 53, the first support roller 521, the second support roller 522, and the second synchronous roller 54, ultimately being guided through the oil pipe protective sleeve 52 to connect to the base 33. This layout design aims to maximize the stroke of the hydraulic cylinder 31 through the interaction of the oil pipes 51, achieving efficient stroke transmission while maintaining a reasonable bending radius of the oil pipe 51 to reduce stress concentration.

[0032] The first layer of oil pipe 511 between the first synchronous roller 53 and the first support roller 521, and the second layer of oil pipe 512 between the second synchronous roller 54 and the first support roller 521, are both maintained horizontally. This helps evenly distribute force and reduce localized stress. The spacing between the first and second synchronous rollers 53 and 54 is set at 3 to 8 cm, and the spacing between the first and second support rollers 521 and 522 is set at 4 to 9 cm. This ensures smooth movement of the oil pipe 51 and reduces wear and pressure loss.

[0033] The present invention operates as follows: As the hydraulic cylinder 31 pushes or retracts, the inner arm 2 extends or contracts accordingly. The first and second synchronous rollers 53, 54, fastened to the inner arm 2, move synchronously with the extension and retraction of the inner arm 2. This design, similar to the rolling mechanism of a movable pulley, allows the oil pipe 51 to follow the movement of the inner arm 2 without being directly dragged.

[0034] In the oil pipe stroke amplification assembly 5, the oil pipe 51 is arranged within a hollow oil pipe protective sleeve 52, fixed to the base 33, providing a stable guide path for the oil pipe 51. The oil pipe 51 is designed in layers, comprising a first layer 511 and a second layer 512. These layers pass around the first synchronous roller 53, the first support roller 521, the second support roller 522, and the second synchronous roller 54, respectively, before returning to the base 33 through the oil pipe protective sleeve 52. This layout ensures that the oil pipe 51 bends with an appropriate bending radius during the extension and retraction of the inner arm 2, reducing internal stress concentration and preventing deformation or rupture of the oil pipe 51 due to excessive bending. Furthermore, the rational layout of the oil pipe 51 avoids interference issues and improves the safety and reliability of the overall operation of the system.

[0035] The bypass design of the oil pipe 51 amplifies the stroke of the oil pipe 51 during the operation of the hydraulic cylinder 31. This effectively reduces the pressure loss caused by an excessively long oil pipe 51, balances the length of the oil supply pipe 51 with system efficiency, and improves the overall performance of the hydraulic system. The entire device ensures the synchronous and smooth sliding of the oil pipe 51 during the extension and retraction of the inner arm 2, ensuring the efficient, safe, and long-term operation of the hydraulic system. It overcomes the problems of improper bending, wear, and pressure loss of the oil pipe 51 commonly found in traditional designs.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A boom oil pipe stroke amplification mechanism, characterized in that: It includes: An extended hydraulic cylinder assembly, the extended hydraulic cylinder assembly comprising a base and a hydraulic cylinder mounted on the base; An inner arm, wherein the inner arm is driven by a hydraulic cylinder to extend and retract; The oil pipe stroke amplification assembly includes an oil pipe protective sleeve, an oil pipe, a first synchronous roller and a second synchronous roller; the oil pipe protective sleeve is fixedly connected to the base; the oil pipe protective sleeve is a hollow structure, and the oil pipe is installed in the hollow structure; the first support roller and the second support roller are fixedly installed on the oil pipe protective sleeve; The inner arm is fixedly connected with a first synchronous roller and a second synchronous roller; The oil pipe comprises a first layer of oil pipe and a second layer of oil pipe, the first layer of oil pipe passes around a first synchronous roller, a first support roller and a second support roller, and is connected to the base via an oil pipe protective sleeve; The second layer of oil pipe passes around the second synchronous roller, the first support roller and the second support roller, and is connected to the base through the oil pipe protection sleeve.

2. The boom oil pipe stroke amplification mechanism according to claim 1, characterized in that: The first layer of oil pipe between the first synchronous roller and the first supporting roller is in a horizontal state.

3. The boom oil pipe stroke amplification mechanism according to claim 1, characterized in that: The second layer of oil pipe between the second synchronous roller and the first supporting roller is in a horizontal state.

4. The boom oil pipe stroke amplification mechanism according to claim 1, characterized in that: The interval between the first synchronous roller and the second synchronous roller is 3cm-8cm.

5. The boom oil pipe stroke amplification mechanism according to claim 1, characterized in that: The interval between the first supporting roller and the second supporting roller is 4 cm-9 cm.

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