CN219058357U

CN219058357U - Mechanical type tower arm prevents backward tilting structure

Info

Publication number: CN219058357U
Application number: CN202223400834.0U
Authority: CN
Inventors: 刘栋; 侯文礼; 朱发浩
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2022-12-19
Filing date: 2022-12-19
Publication date: 2023-05-23
Anticipated expiration: 2032-12-19

Abstract

The utility model provides a mechanical tower arm backward tilting prevention structure, which relates to the field of crawler cranes and comprises a main arm, a tower arm rear pulling plate, a tower arm rear support, a tower arm luffing rope, a tower arm front support, an auxiliary arm and a front support backward tilting prevention device. The problem that the oil cylinder structure in the prior art can increase manufacturing and maintenance cost, and meanwhile, the reliability of the oil cylinder can influence the working efficiency of the tower arm and the safety performance of the whole machine is solved; the structure of the mechanical front support backward tilting prevention device reduces manufacturing and maintenance costs.

Description

Mechanical type tower arm prevents backward tilting structure

Technical Field

The utility model relates to the field of crawler cranes, in particular to a mechanical tower arm backward tilting prevention structure.

Background

The crawler crane is mechanical equipment which adopts a crawler walking chassis and can lift heavy objects to a certain height. Under special environment and requirements, the working condition of the tower arm is needed to be used, and the auxiliary arm and the front and rear brackets of the tower arm are hinged with the arm head and the bottom joint arm through pin shafts. Because the gravity of the pulling plate and the dead weight of the rear support, when a certain angle is formed, the whole formed by the auxiliary arm of the tower arm, the front and rear supports and the connected front and rear pulling plates has a backward tilting tendency, and in order to resist the backward tilting tendency, an anti-backward tilting structure is added. The anti-recline structure resists to some extent the tendency of the tower arm to recline. The working principles of different backward tilting prevention structural forms are different, and the cost is also different.

When the crane tower arm working condition is started, after the rear pulling plate is connected with the tower arm rear support, the pulling plate cannot reach the tight state of working due to the dead weight of the pulling plate and the structural characteristics of the pulling plate, the pulling plate is in a natural loose sagging state, and the rear support cannot extend to the working length due to the backward tilting prevention of the rear support under the state, so that the rear support needs to extend according to the angle change of the support after the tower arm working condition is started, and the main structural form of the tower arm rear support is an oil cylinder structure with controllable telescopic length. The adoption of the oil cylinder structure increases the manufacturing and maintenance cost, and the reliability of the oil cylinder influences the working efficiency of the tower arm and the safety performance of the whole machine.

Disclosure of Invention

In order to solve the problems that the oil cylinder structure in the prior art can increase manufacturing and maintenance cost, and meanwhile, the reliability of the oil cylinder can influence the working efficiency of a tower arm and the safety performance of the whole machine, the utility model provides a mechanical tower arm backward tilting prevention structure, which comprises a main arm, a tower arm rear pulling plate, a tower arm rear bracket, a tower arm luffing rope, a tower arm front bracket, an auxiliary arm and a front bracket backward tilting prevention device; the main arm is connected with the auxiliary arm; the tower arm rear support is hinged with the tower arm front support through a tower arm luffing rope; one end of the tower arm rear pulling plate is connected with the tower arm amplitude-changing rope and the hinged end of the tower arm rear bracket, and the other end is connected with the main arm; one end of the tower arm rear support is hinged with the tower arm amplitude-variable rope, and the other end of the tower arm rear support is connected with the front support anti-backward tilting device; one end of the front support anti-backward tilting device is connected with the tower arm rear support, and the other end is connected with the frame body part of the tower arm front support.

According to the mechanical tower arm backward tilting prevention structure, preferably, the connecting part of the main arm and the auxiliary arm is provided with the connecting ring; the tower arm rear support and the tower arm front support are respectively connected with the connecting ring through a fixed rope; one end of the front support anti-backward tilting device is connected with the support body part of the tower arm front support; the other end is fixed on a connecting rope fixed on the tower arm rear bracket and the connecting ring.

The utility model provides a mechanical tower arm backward tilting prevention structure, which is characterized in that a front support backward tilting prevention device comprises a sleeve connecting pin shaft, a fixed pin shaft, a sleeve, a core pipe and a core pipe connecting pin shaft; the front bracket backward tilting prevention device is sleeved with a double pipe; the diameter of the sleeve is larger than that of the core tube; the sleeve is fixed with the core tube through a fixed pin shaft; the sleeve is provided with a sleeve connecting port; the sleeve connecting pin shaft is inserted into the sleeve connecting port; the core tube is provided with a core tube connecting port; the core tube connecting pin shaft is inserted into the core tube connecting port.

According to the mechanical tower arm backward tilting prevention structure, preferably, at least one fixing hole is formed in the sleeve; at least one connecting hole is formed in the core tube; the fixed pin shaft passes through the fixed hole and the connecting hole to fix the sleeve and the core tube; the installation of different fixing holes and connecting holes can be used for adjusting the length of the front bracket anti-backward tilting device.

According to the mechanical tower arm backward tilting prevention structure, preferably, the front support backward tilting prevention device is arranged between the main arm and the tower arm rear support after being stretched to prevent the tower arm rear support from rotating.

The utility model provides a mechanical tower arm backward tilting prevention structure which comprises a main arm, a tower arm rear pulling plate, a tower arm rear support, a tower arm luffing rope, a tower arm front support, an auxiliary arm and a front support backward tilting prevention device. The problem that the oil cylinder structure in the prior art can increase manufacturing and maintenance cost, and meanwhile, the reliability of the oil cylinder can influence the working efficiency of the tower arm and the safety performance of the whole machine is solved; the structure of the mechanical front support backward tilting prevention device reduces manufacturing and maintenance costs.

Drawings

FIG. 1 is a schematic diagram of a mechanical tower arm anti-recline structure according to the present utility model;

fig. 2 is a schematic structural view of a front bracket anti-backward tilting device of a mechanical tower arm anti-backward tilting structure provided by the utility model;

FIG. 3 is a schematic diagram of a connection part of a mechanical tower arm anti-backward tilting structure according to the present utility model;

reference numerals in the drawings: the tower arm comprises a main arm 1, a tower arm rear pulling plate 2, a tower arm rear support 3, a tower arm luffing rope 4, a tower arm front support 5, an auxiliary arm 6, a front support anti-backward tilting device 7, a sleeve connecting pin shaft 7-1, a fixed pin shaft 7-2, a sleeve 7-3, a sleeve connecting port 7-3-1, a fixed hole 7-3-2, a core tube 7-4, a core tube connecting port 7-4-1, a connecting hole 7-4-2, a core tube connecting pin shaft 7-5 and a connecting ring 8.

Detailed Description

The utility model will be described in further detail with reference to the accompanying drawings and specific preferred embodiments.

In the description of the present utility model, it should be understood that the terms "left", "right", "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and "first", "second", etc. do not indicate the importance of the components, and thus are not to be construed as limiting the present utility model. The specific dimensions adopted in the present embodiment are only for illustrating the technical solution, and do not limit the protection scope of the present utility model.

Example 1:

as shown in fig. 1 to 3, the mechanical tower arm backward tilting prevention structure provided by the utility model comprises a main arm 1, a tower arm rear pulling plate 2, a tower arm rear bracket 3, a tower arm luffing rope 4, a tower arm front bracket 5, an auxiliary arm 6 and a front bracket backward tilting prevention device 7; the main arm 1 is connected with the auxiliary arm 2; the tower arm rear bracket 3 is hinged with the tower arm front bracket 5 through a tower arm amplitude-variable rope 4; one end of the tower arm rear pulling plate 2 is connected with the tower arm amplitude-changing rope 4 and the hinged end of the tower arm rear bracket 3, and the other end is connected with the main arm 1; one end of a tower arm rear bracket 3 is hinged with a tower arm amplitude-changing rope 4, and the other end is connected with a front bracket backward tilting prevention device 7; one end of the front support anti-backward tilting device 7 is connected with the tower arm rear support 4, and the other end is connected with the frame body part of the tower arm front support 5.

More specifically, a connecting ring 8 is arranged at the joint of the main arm 1 and the auxiliary arm 2; the tower arm rear bracket 3 and the tower arm front bracket 5 are respectively connected with the connecting ring 8 through a fixed rope; one end of the front support anti-backward tilting device 7 is connected with the support body part of the tower arm front support 5; the other end is fixed on a connecting rope fixed on the tower arm rear bracket 3 and the connecting ring 8.

More specifically, the front bracket anti-backward tilting device 7 comprises a sleeve connecting pin 7-1, a fixed pin 7-2, a sleeve 7-3, a core tube 7-4 and a core tube connecting pin 7-5; the front bracket backward tilting prevention device 7 is sleeved with a double pipe; the diameter of the sleeve 7-3 is larger than that of the core tube 7-4; the sleeve 7-3 and the core tube 7-4 are fixed through a fixed pin shaft 7-2; the sleeve 7-3 is provided with a sleeve connecting port 7-3-1; the sleeve connecting pin shaft 7-1 is inserted into the sleeve connecting port 7-3-1; the core tube 7-4 is provided with a core tube connecting port 7-4-1; the core tube connecting pin shaft 7-5 is inserted into the core tube connecting port 7-4-1.

More specifically, the sleeve 7-3 is provided with at least one fixing hole 7-3-2; at least one connecting hole 7-4-2 is arranged on the core tube 7-4; the fixed pin shaft 7-2 passes through the fixed hole 7-3-2 and the connecting hole 7-4-2 to fix the sleeve 7-3 and the core tube 7-4; the installation of different fixing holes 7-3-2 and connecting holes 7-4-2 can be used to adjust the length of the front bracket anti-recline device 7.

More specifically, the front bracket anti-backward tilting device 7 is installed between the main arm 1 and the tower arm rear bracket 3 after being extended to prevent the tower arm rear bracket 3 from rotating.

Working principle:

in the process of lifting the tower arm, the tower arm back support 3 rotates around a hinge point by tightening the tower arm luffing rope 4, so that the tower arm back pulling plate 2 is tensioned, and the tower arm front support 5 is supported by the front support anti-backward tilting device 7 and cannot rotate backward due to the existence of the front support anti-backward tilting device 7, so that the tower arm back support 3 rotates forward, and the aim of tightening the tower arm back pulling plate 2 is fulfilled.

After the tower arm rear pulling plate 2 is basically positioned, the length of the front support anti-backward tilting device 7 can be adjusted to be installed between the tower arm rear support 3 and the main arm 1 and fixed, and the length of the front support anti-backward tilting device 7 is slightly different from the working length.

In summary, the mechanical tower arm backward tilting prevention structure provided by the utility model comprises a main arm, a tower arm rear pulling plate, a tower arm rear support, a tower arm luffing rope, a tower arm front support, an auxiliary arm and a front support backward tilting prevention device. The problem that the oil cylinder structure in the prior art can increase manufacturing and maintenance cost, and meanwhile, the reliability of the oil cylinder can influence the working efficiency of the tower arm and the safety performance of the whole machine is solved; the structure of the mechanical front support backward tilting prevention device reduces manufacturing and maintenance costs.

While the present utility model has been described in detail through the foregoing description of the preferred embodiment, it should be understood that the foregoing description is not to be considered as limiting the utility model. Many modifications and substitutions of the present utility model will become apparent to those of ordinary skill in the art upon reading the foregoing. Within the technical conception scope of the utility model, a plurality of equivalent changes can be carried out on the technical proposal of the utility model, and the equivalent changes belong to the protection scope of the utility model.

Claims

1. The mechanical tower arm backward tilting prevention structure is characterized by comprising a main arm (1), a tower arm rear pulling plate (2), a tower arm rear support (3), a tower arm luffing rope (4), a tower arm front support (5), an auxiliary arm (6) and a front support backward tilting prevention device (7); the main arm (1) is connected with the auxiliary arm (6); the tower arm rear bracket (3) is hinged with the tower arm front bracket (5) through a tower arm luffing rope (4); one end of the tower arm rear pulling plate (2) is connected with the hinged end of the tower arm amplitude changing rope (4) and the tower arm rear bracket (3), and the other end is connected with the main arm (1); one end of a tower arm rear bracket (3) is hinged with a tower arm amplitude-changing rope (4), and the other end is connected with a front bracket backward tilting prevention device (7); one end of the front support anti-backward tilting device (7) is connected with the tower arm rear support (3), and the other end is connected with the frame body part of the tower arm front support (5).

2. A mechanical tower arm backward tilting prevention structure according to claim 1, wherein a connecting ring (8) is arranged at the joint of the main arm (1) and the auxiliary arm (6); the tower arm rear bracket (3) and the tower arm front bracket (5) are respectively connected with the connecting ring (8) through a fixed rope; one end of the front support anti-backward tilting device (7) is connected with the frame body part of the tower arm front support (5); the other end is fixed on a connecting rope fixed on the tower arm rear bracket (3) and the connecting ring (8).

3. A mechanical tower arm backward tilting prevention structure according to claim 1, wherein the front bracket backward tilting prevention device (7) comprises a sleeve connecting pin (7-1), a fixed pin (7-2), a sleeve (7-3), a core tube (7-4) and a core tube connecting pin (7-5); the front bracket backward tilting prevention device (7) is sleeved with a double pipe; the diameter of the sleeve (7-3) is larger than that of the core tube (7-4); the sleeve (7-3) is fixed with the core tube (7-4) through a fixed pin shaft (7-2); the sleeve (7-3) is provided with a sleeve connecting port (7-3-1); the sleeve connecting pin shaft (7-1) is inserted into the sleeve connecting port (7-3-1); a core pipe connecting port (7-4-1) is arranged on the core pipe (7-4); the core tube connecting pin shaft (7-5) is inserted into the core tube connecting port (7-4-1).

4. A mechanical tower arm anti-recline structure according to claim 3, wherein the sleeve (7-3) is provided with at least one fixing hole (7-3-2); at least one connecting hole (7-4-2) is arranged on the core tube (7-4); the fixed pin shaft (7-2) passes through the fixed hole (7-3-2) and the connecting hole (7-4-2) to fix the sleeve (7-3) and the core tube (7-4); the installation of different fixing holes (7-3-2) and connecting holes (7-4-2) can be used for adjusting the length of the front bracket anti-backward tilting device (7).

5. A mechanical tower arm backward tilting prevention structure according to claim 1, wherein the front bracket backward tilting prevention device (7) is installed between the main arm (1) and the tower arm rear bracket (3) after being extended to prevent the rotation of the tower arm rear bracket (3).