Crawler hanger pin shaft structure convenient to install

Abstract

The utility model discloses a crawler crane pin shaft structure convenient to install, which comprises a counter weight supporting arm, a pin shaft base and a pin shaft assembly, the bottom end of the counter weight supporting arm is installed on a crawler crane underframe, and the top end of the counter weight supporting arm is provided with a fixed base fixedly installed with a crawler crane lifting arm. Pin shaft bases are symmetrically arranged on the inner side of the top end of the balance weight supporting arm, the pin shaft assembly comprises a limiting plate arranged at the tail end, an inserting shaft is integrally formed on the surface of the top end of the limiting plate, first clamping blocks are symmetrically arranged at the bottom end of the inserting shaft, second clamping blocks are symmetrically arranged at the top end of the inserting shaft, and first threaded holes are formed in the surfaces of the second clamping blocks; the pin shaft assembly is positioned and mounted in the pin shaft base, so that the stable mounting of the pin shaft assembly is improved; when the pin shaft assembly is disassembled and replaced, the pin shaft assembly can be replaced only by loosening the bolt and pulling out the pin shaft assembly from the pin shaft base, and the characteristics that the number of maintenance parts is small, and maintenance and disassembly are rapid are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of crawler suspension shaft structures, and particularly relates to a crawler suspension shaft structure which is convenient for installation. Background Technique

[0002] A crawler crane refers to a fully rotating boom crane with a crawler walking device. The crawler crane is composed of a power device, a working mechanism, a boom, a turntable, a chassis, etc. The crawler crane has the advantages of good stability, large load capacity, good anti-slip performance, and low requirements for the road surface. To ensure the lifting stability and counterweight balance of the crawler crane, it is necessary to install a suitable counterweight block to cooperate with the lifting operation.

[0003] Publication (Announcement) Number: CN214693000U discloses a crawler crane counterweight device, which includes a crawler crane body, a boom, and a jib. Both the boom and the jib are hinged to the crawler crane body. The counterweight device further includes a counterweight member, which includes a counterweight block and a driving assembly. The counterweight block is located on the jib, and the driving assembly is used to adjust the position of the counterweight block on the jib.

[0004] In the prior art:

[0005] First, the rope structure for connecting and installing the counterweight block is difficult to install and disassemble with the crawler crane, and it is impossible to achieve quick disassembly and installation.

[0006] Second, using a pulley structure for hoisting the counterweight block increases the number of maintenance parts, and it is impossible to achieve high maintenance efficiency for a single part installation and maintenance of the counterweight block. For example, using a pin and rope winding hoisting method.

[0007] Therefore, it is necessary to provide a crawler suspension shaft structure that is convenient for installation. Summary of the Utility Model

[0008] Aiming at the problems existing in the above-mentioned prior art, the utility model provides a crawler suspension shaft structure that is convenient for installation, aiming to improve the calibration efficiency of the pull rope type length calibration and improve the calibration accuracy of the product, and avoid inaccurate product length measurement parameters.

[0009] To achieve the above object, the utility model is realized through the following technical solutions: A crawler crane suspension shaft structure convenient for installation, which includes a counterweight support arm, a pin shaft base, and a pin shaft assembly. The bottom end of the counterweight support arm is installed on the crawler crane chassis, and a fixed base fixedly installed with the crawler crane lifting arm is provided at the top end of the counterweight support arm. Pin shaft bases are symmetrically arranged on the inner side of the top end of the counterweight support arm. The pin shaft assembly includes a limiting plate provided at the end. An insertion shaft is integrally formed on the top surface of the limiting plate. A first clamping block is symmetrically arranged at the bottom end of the insertion shaft, and a second clamping block is symmetrically arranged at the top end of the insertion shaft. A first threaded hole is provided on the surface of the second clamping block. The assembly structure of the pin shaft assembly and the pin shaft base is as follows: The insertion shaft together with the two second clamping blocks is inserted into the pin shaft base. The first clamping block limits the installation inside the pin shaft base, and then the limiting plate positions and installs the pin shaft assembly inside the pin shaft base. The first threaded hole is fixedly installed through a bolt, so that the pin shaft assembly is fixedly installed on the pin shaft base. The insertion shaft is wound with a rope for hoisting the configuration block.

[0010] Preferably, a hoisting through hole is provided in the middle of the pin shaft base. A polygonal groove is provided on the opposite side surface between the pin shaft bases. A cylindrical hole extends inward from the polygonal groove. A first limiting groove is provided at the position of the cylindrical hole corresponding to the first clamping block. A circular groove is provided on the end surface of the hoisting through hole far from the cylindrical hole. A second limiting groove is provided at the position of the circular groove corresponding to the second clamping block. A second threaded hole is provided inside the second limiting groove and the second threaded hole penetrates through the surface of the pin shaft base. The second threaded hole is coaxially arranged with the first threaded hole, and the second threaded hole and the first threaded hole are fixedly installed through a bolt.

[0011] Preferably, the limiting plate is arranged as a rectangular groove, and the polygonal groove is arranged as a rectangular structure.

[0012] Preferably, the first clamping block is arranged as a rectangular structure, and the first limiting groove is arranged as a rectangular groove.

[0013] Preferably, the second clamping block is arranged as a rectangular structure, and the second limiting groove is arranged as a rectangular groove.

[0014] In summary, the utility model provides a crawler crane suspension shaft structure convenient for installation. The assembly method of the pin shaft assembly and the pin shaft base in this patent is as follows: The insertion shaft together with the two second clamping blocks passes through the polygonal groove, the cylindrical hole, and the hoisting through hole. The insertion shaft is inserted into the circular groove, and the second clamping block is correspondingly inserted into the second limiting groove. The second threaded hole is coaxially arranged with the first threaded hole. By installing the second threaded hole and the first threaded hole through a bolt, the pin shaft assembly is positioned and installed on the pin shaft base. Due to the limiting installation cooperation between the limiting plate and the polygonal groove, and the limiting installation cooperation between the first clamping block and the first limiting groove, the pin shaft assembly is positioned and installed inside the pin shaft base, increasing the stable installation of the pin shaft assembly; when disassembling and replacing the pin shaft assembly, only need to loosen the bolt and pull out the pin shaft assembly from the pin shaft base to replace the pin shaft assembly, realizing the characteristics of few maintenance parts, fast maintenance and disassembly. Description of the Drawings

[0015] Figure 1 is the structural schematic diagram of the present utility model;

[0016] Figure 2 is the internal structural schematic diagram of the pin base of the present utility model;

[0017] Figure 3 is the structural schematic diagram of the pin assembly of the present utility model;

[0018] Figure 4 is the structural schematic diagram of the cooperation between the pin assembly and the pin base of the present utility model;

[0019] In the figure: counterweight support arm 1, pin base 2, pin assembly 3, fixed base 4, limit plate 5, insertion shaft 6, first clamping block 7, second clamping block 11, first threaded hole 12, hoisting through hole 13, polygonal groove 14, cylindrical hole 15, first limit groove 16, circular groove 17, second limit groove 21, second threaded hole 22. Specific embodiments

[0020] The present utility model will be further described below with reference to the accompanying drawings.

[0021] As Figures 1 to 4 shown:

[0022] The present utility model is a crawler crane pin shaft structure that is convenient for installation, including a counterweight support arm 1, a pin base 2, and a pin assembly 3. The bottom end of the counterweight support arm 1 is installed on the crawler crane chassis, and the top end of the counterweight support arm 1 is provided with a fixed base 4 fixedly installed with the crawler crane lifting arm. The inner side of the top end of the counterweight support arm 1 is symmetrically provided with pin bases 2. The pin assembly 3 includes a limit plate 5 provided at the end. The top surface of the limit plate 5 is integrally formed with an insertion shaft 6. At the bottom end of the insertion shaft 6, first clamping blocks 7 are symmetrically provided. At the top end of the insertion shaft 6, second clamping blocks 11 are symmetrically provided. A first threaded hole 12 is provided on the surface of the second clamping block 11. The assembly structure of the pin assembly 3 and the pin base 2 is: the insertion shaft 6 together with the two second clamping blocks 11 is inserted into the inside of the pin base 2, and is limited and installed in the pin base 2 by the first clamping blocks 7, and then the pin assembly 3 is positioned and installed in the pin base 2 by the limit plate 5. The first threaded hole 12 is fixedly installed by bolts, so that the pin assembly 3 is fixedly installed on the pin base 2. The insertion shaft 6 is wound with a rope for hoisting the configuration block.

[0023] To solve the problems of reducing the number of components for hoisting the counterweight of the crawler crane, reducing the number of maintenance parts, and enabling rapid maintenance and disassembly, the technical structure adopted in this patent is: the bottom end of the counterweight support arm 1 is installed on the crawler crane chassis, and the top end of the counterweight support arm 1 is provided with a fixed base 4 fixedly installed with the crawler crane lifting arm. The crawler crane lifting arm is installed with the fixed base 4 through a rope to achieve the load-bearing balance between the counterweight support arm 1 when installing the counterweight block and the crawler crane lifting arm;

[0024] On the inner side of the top end of the counterweight support arm 1, pin bases 2 are symmetrically arranged. A hoisting through hole 13 is opened in the middle of the pin base 2. A polygonal groove 14 is opened on the opposite side surface between the pin bases 2. A columnar hole 15 extends inward from the polygonal groove 14. A first limiting groove 16 is opened at the position corresponding to the first clamping block 7 in the columnar hole 15. A circular groove 17 is opened at the end surface of the hoisting through hole 13 far from the columnar hole 15. A second limiting groove 21 is opened at the position corresponding to the second clamping block 11 in the circular groove 17. A second threaded hole 22 is opened inside the second limiting groove 21, and the second threaded hole 22 penetrates through the surface of the pin base 2 and is arranged coaxially with the first threaded hole 12;

[0025] The assembly method of the pin assembly 3 and the pin base 2 is as follows: The insertion shaft 6 together with the two second clamping blocks 11 passes through the polygonal groove 14, the columnar hole 15, and the hoisting through hole 13. The insertion shaft 6 is inserted into the circular groove 17. The second clamping blocks 11 are correspondingly inserted into the second limiting grooves 21. The second threaded hole 22 is arranged coaxially with the first threaded hole 12. The pin assembly 3 is positioned and installed on the pin base 2 by installing bolts in the second threaded hole 22 and the first threaded hole 12. Due to the limiting installation cooperation between the limiting plate 5 and the polygonal groove 14, and the limiting installation cooperation between the first clamping block 7 and the first limiting groove 16, the pin assembly 3 is positioned and installed inside the pin base 2, increasing the stable installation of the pin assembly 3; when disassembling and replacing the pin assembly 3, only need to loosen the bolts and draw out the pin assembly 3 from the pin base 2, then the pin assembly 3 can be replaced, realizing the characteristics of few maintenance parts, fast maintenance and disassembly.

[0026] In at least one embodiment, in order to increase the stability of the installation of the limiting plate 5, the following structure is adopted: The limiting plate 5 is arranged as a rectangular groove, the polygonal groove 14 is arranged as a rectangular structure, and the limiting plate 5 is limitedly installed in the polygonal groove 14 to prevent the pin from rotating during use and play a positioning role.

[0027] In at least one embodiment, in order to increase the stability of the installation of the pin assembly 3, the following structure is adopted: The first clamping block 7 is arranged as a rectangular structure, and the first limiting groove 16 is arranged as a rectangular groove.

[0028] In at least one embodiment, in order to increase the stability of the installation of the pin assembly 3, the following structure is adopted: The second clamping block 11 is arranged as a rectangular structure, and the second limiting groove 21 is arranged as a rectangular groove.

[0029] The embodiments in the present invention are only used to illustrate the present invention and do not constitute a limitation to the scope of the claims. Other substantially equivalent alternatives that can be thought of by those skilled in the art are all within the protection scope of the present invention.

Claims

1. A crawler suspension pin shaft structure that is easy to install, characterized in that: The invention comprises a counterweight support arm (1), a pin shaft base (2) and a pin shaft assembly (3), wherein the bottom end of the counterweight support arm (1) is mounted on a crawler crane underframe, the top end of the counterweight support arm (1) is provided with a fixed base (4) fixedly mounted with a crawler crane lifting arm, the top end of the counterweight support arm (1) is symmetrically provided with a pin shaft base (2) on the inner side of the top end of the counterweight support arm (1), the pin shaft assembly (3) comprises a limit plate (5) arranged at the end, the top surface of the limit plate (5) is integrally formed with a plug shaft (6), a clamping block (7) is symmetrically provided at the bottom end of the plug shaft (6), and a clamping block (8) is symmetrically provided at the top end of the plug shaft (6). The second clamping block (11) has a threaded hole (12) on its surface. The assembly structure of the pin shaft assembly (3) and the pin shaft base (2) is as follows: the plug-in shaft (6) together with the two second clamping blocks (11) is plugged into the inside of the pin shaft base (2). The first clamping block (7) is limitedly installed in the inside of the pin shaft base (2). The pin shaft assembly (3) is positioned and installed in the inside of the pin shaft base (2) by the limit plate (5). The threaded hole (12) is fixedly installed by bolts so that the pin shaft assembly (3) is fixedly installed on the pin shaft base (2). The plug-in shaft (6) is wound with a rope for hoisting the configuration block.

2. A crawler suspension pin shaft structure that is easy to install according to claim 1, characterized in that: A lifting through hole (13) is provided in the middle of the pin shaft base (2), a polygonal groove (14) is provided on the surface of one side opposite to the pin shaft base (2), a columnar hole (15) is provided inwardly of the polygonal groove (14), a limiting groove (16) is provided at a position corresponding to the first clamping block (7) of the columnar hole (15), a circular groove (17) is provided on the end surface of the lifting through hole (13) away from the columnar hole (15), a limiting groove (21) is provided at a position corresponding to the second clamping block (11), a threaded hole (22) is provided inside the second limiting groove (21), and the threaded hole (22) is arranged on the surface of the pin shaft base (2), the threaded hole (22) is coaxially arranged with the threaded hole (12), and the threaded hole (22) and the threaded hole (12) are fixedly installed by bolts.

3. A crawler suspension pin shaft structure that is easy to install according to claim 2, characterized in that: The limiting plate (5) is configured as a rectangular groove, and the polygonal groove (14) is configured as a rectangular structure.

4. The crawler suspension pin shaft structure that is easy to install according to claim 2, characterized in that: The clamping block 1 (7) is configured as a rectangular structure, and the limiting groove 1 (16) is configured as a rectangular groove.

5. The crawler suspension pin shaft structure that is easy to install according to claim 2, characterized in that: The second clamping block (11) is configured as a rectangular structure, and the second limiting groove (21) is configured as a rectangular groove.

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