Search

CN-121974262-A - Front crane, crane arm telescopic mechanism and working method thereof

CN121974262ACN 121974262 ACN121974262 ACN 121974262ACN-121974262-A

Abstract

The invention belongs to the technical field of container lifting, in particular to a lifting structure for container lifting, and particularly relates to a front crane, a lifting arm telescopic mechanism and a working method thereof. The lifting arm telescopic mechanism comprises a lifting arm, a fixed arm and a driving oil cylinder, wherein a gasket assembly is arranged on the lifting arm, a scraping plate is rotatably arranged at the top of the gasket assembly, and a damping piece is arranged at the position where the fixed arm is matched with the scraping plate. Through setting up gasket subassembly and damping piece, when the lifting arm stretches out, the scraper blade supports with the fixed arm inner wall and holds, can initiatively strike off mud scale and impurity on the contact surface, prevents that the pollutant from gathering to reduce gasket subassembly's abnormal wear. Meanwhile, when the lifting arm is accommodated in the fixed arm, the scraping plate is released from being abutted against the inner wall of the fixed arm, so that abrasion between the scraping plate and the inner wall of the fixed arm is reduced, and the service life of the scraping plate is prolonged.

Inventors

  • ZHU GUOQIAN
  • HU BINBIN
  • XU RONG

Assignees

  • 徐州徐工港口机械有限公司

Dates

Publication Date
20260505
Application Date
20260320

Claims (10)

  1. 1. A boom telescoping mechanism, comprising: a lifting arm (100); a fixed arm (200) sleeved on the lifting arm (100); A drive cylinder (300) which is provided in the fixed arm (200), and a piston rod of the drive cylinder (300) is connected to the lifting arm (100); Wherein the lifting arm (100) is provided with a gasket assembly (400); the gasket assembly (400) is arranged between the inner wall of the fixed arm (200) and the outer wall of the lifting arm (100), and the gasket assembly (400) is abutted against the inner wall of the fixed arm (200); a scraper (410) is rotatably arranged at the top of the gasket assembly (400); A damping piece (420) is arranged at the adapting position of the fixed arm (200) and the scraper (410); When the driving oil cylinder (300) drives the lifting arm (100) to extend out of the fixed arm (200), the damping piece (420) is driven to slide below the scraping plate (410) so as to enable the scraping plate (410) to be abutted against the inner wall of the fixed arm (200), and therefore the contact surface of the gasket assembly (400) and the fixed arm (200) is cleaned; When the lifting arm (100) is driven by the driving oil cylinder (300) to be accommodated in the fixed arm (200), the damping piece (420) is separated from the lower part of the scraper (410), and the scraper (410) is released from abutting against the inner wall of the fixed arm (200).
  2. 2. The boom telescoping mechanism of claim 1, The damping member (420) includes: A slide bar (421) slidably provided on an inner wall of the fixed arm (200); Wherein the sliding surfaces of the sliding rod (421) and the fixed arm (200) are coated with damping layers; one end of the scraper (410) far away from the gasket assembly (400) extends outwards to form a hook claw (422); when the lifting arm (100) is driven by the driving oil cylinder (300) to be accommodated in the fixed arm (200), the sliding rod (421) is separated from the lower part of the scraping plate (410), the scraping plate (410) is released from abutting against the inner wall of the fixed arm (200), and then the sliding rod (421) is driven to slide along the inner wall of the fixed arm (200) through the hook claw (422), so that the reset is completed.
  3. 3. The boom telescoping mechanism of claim 2, Two side walls of the fixed arm (200) are provided with sliding grooves (423); the chute (423) is arranged along the moving direction of the lifting arm (100); both ends of the sliding rod (421) are slidably arranged in the corresponding sliding grooves (423).
  4. 4. The boom telescoping mechanism of claim 2, An inclined surface (411) is arranged on one side of the scraper (410) away from the inner wall of the fixed arm (200); And, the inclined surface (411) gradually approaches the inner wall of the fixed arm (200) along the extending direction of the lifting arm (100).
  5. 5. The boom telescoping mechanism of claim 4, The inclined surface (411) is triangular; when the lifting arm (100) is driven by the driving oil cylinder (300) to extend out of the fixed arm (200), the scraped sundries are pushed out to two sides through the triangular inclined surface (411).
  6. 6. The boom telescoping mechanism of claim 1, The gasket assembly (400) includes: The U-shaped limiting frame (430) is welded on the outer wall of the lifting arm (100); the gasket body (440) is fixedly arranged on the lifting arm (100) through a bolt and is positioned in the U-shaped limiting frame (430); The scraping plate (410) is rotatably arranged on the U-shaped limiting frame (430).
  7. 7. The boom telescoping mechanism of claim 6, The thickness of the U-shaped limiting frame (430) is smaller than that of the gasket body (440).
  8. 8. The boom telescoping mechanism of claim 1, The number of the gasket assemblies (400) is two; the two gasket assemblies (400) are respectively arranged at the bottom of the lifting arm (100) and are positioned at two sides of the bottom of the lifting arm (100).
  9. 9. A front crane, comprising: A crane body; the boom telescoping mechanism of any of claims 1-8; the crane arm telescopic mechanism is arranged on the crane body.
  10. 10. A method of operation employing a boom telescoping mechanism as claimed in any one of claims 1-8, said method of operation comprising: The driving oil cylinder (300) drives the lifting arm (100) to extend out of the fixed arm (200); The damping piece (420) slides into the lower part of the scraper (410) to clean the contact surface of the gasket assembly (400) and the fixed arm (200); the driving oil cylinder (300) drives the lifting arm (100) to be accommodated in the fixed arm (200); the damper (420) is disengaged from the lower part of the scraper (410), and the scraper (410) is released from abutting against the inner wall of the fixed arm (200).

Description

Front crane, crane arm telescopic mechanism and working method thereof Technical Field The invention belongs to the technical field of container lifting, in particular to a lifting structure for container lifting, and particularly relates to a front crane, a lifting arm telescopic mechanism and a working method thereof. Background Front cranes are widely used for container handling operations in ports. The boom telescoping mechanism is a core component and generally comprises components such as a lifting arm, a fixed arm, a driving oil cylinder and the like. In the related art, in order to reduce friction and wear between the lifting arm and the fixed arm, a pad assembly is required to be disposed between the lifting arm and the fixed arm for supporting and buffering. However, in practice, the gasket assembly is prone to contamination with mud, impurities or hard particulates. The pollutants can accumulate at the contact interface between the gasket and the inner wall of the fixed arm, so that the gasket assembly is abnormally worn in the telescopic process, the damage of the gasket is accelerated, and the problems of clamping stagnation of the lifting arm, noise increase or load increase of the driving oil cylinder can be caused. Frequent maintenance and pad replacement not only increases equipment downtime and costs, but also affects the reliability and efficiency of crane operation. Therefore, how to avoid the abrasion of the gasket assembly caused by the impurities of the lifting arm and the fixing arm is a technical problem to be solved. It should be noted that the above information disclosed in this background section is only for understanding the background of the inventive concept and therefore the above description is not to be construed as constituting prior art information. Disclosure of Invention The embodiment of the disclosure at least provides a crane arm telescoping mechanism and a working method thereof. In a first aspect, embodiments of the present disclosure provide a boom telescoping mechanism comprising: A lifting arm; the fixed arm is sleeved on the lifting arm; The driving oil cylinder is arranged in the fixed arm, and a piston rod of the driving oil cylinder is connected with the lifting arm; wherein, the lifting arm is provided with a gasket component; The gasket assembly is arranged between the inner wall of the fixed arm and the outer wall of the lifting arm, and is propped against the inner wall of the fixed arm; The top of the gasket assembly is rotatably provided with a scraping plate; a damping piece is arranged at the adapting position of the fixed arm and the scraping plate; When the driving oil cylinder drives the lifting arm to extend out of the fixed arm, the damping piece is driven to slide into the lower part of the scraping plate so as to enable the scraping plate to be abutted against the inner wall of the fixed arm, and therefore the contact surface of the gasket assembly and the fixed arm is cleaned; When the driving oil cylinder drives the lifting arm to be accommodated in the fixed arm, the damping piece is separated from the lower part of the scraping plate, and the scraping plate is released from abutting against the inner wall of the fixed arm. In an alternative embodiment, the damping member includes: The sliding rod is arranged on the inner wall of the fixed arm in a sliding manner; Wherein the sliding surfaces of the sliding rod and the fixed arm are coated with damping layers; a hook claw extends outwards from one end of the scraping plate, which is far away from the gasket assembly; when the lifting arm is driven by the driving oil cylinder to be accommodated in the fixed arm, the sliding rod is separated from the lower part of the scraping plate, the scraping plate is released from being abutted against the inner wall of the fixed arm, and the sliding rod is driven to slide along the inner wall of the fixed arm through the hook claw, so that reset is completed. In an alternative embodiment, two side walls of the fixed arm are provided with sliding grooves; the sliding chute is arranged along the moving direction of the lifting arm; the two ends of the sliding rod are arranged in the corresponding sliding grooves in a sliding manner. In an alternative embodiment, the side of the scraper plate remote from the inner wall of the fixed arm is provided with an inclined surface; and the inclined surface gradually approaches to the inner wall of the fixed arm along the extending direction of the lifting arm. In an alternative embodiment, the inclined surface is triangular; When the driving oil cylinder drives the lifting arm to extend out of the fixed arm, the scraped sundries are pushed out to two sides through the triangular inclined surface. In an alternative embodiment, the gasket assembly includes: The U-shaped limiting frame is welded on the outer wall of the lifting arm; The gasket body is fixedly arranged on the lifting arm through a bolt and is positione