Rotating arm device of crane

Abstract

The utility model discloses a rotating arm device of a crane, which belongs to the technical field of hoisting machinery and comprises a manual arm fixed on a minimum arm of an arm support assembly, a rotating arm mounting seat sleeved at one end of the manual arm, a rotating arm fixed by a rotating arm shaft and a lifting hook connected to an arm head of the rotating arm. A plurality of groups of first mounting holes are formed in the rotating arm mounting seat and are used for adjusting the mounting angle of the rotating arm so as to adapt to different working conditions of upward hoisting, parallel hoisting and downward hoisting. And a plurality of groups of second mounting holes are further formed in the manual arm and are used for adjusting the telescopic length of the manual arm. In addition, handles are arranged on the manual arm shaft and the rotating arm shaft, so that disassembly and assembly are convenient. According to the utility model, by improving the mounting and adjusting mechanism of the rotating arm, the hoisting performance of the crane in a narrow or complex environment is effectively improved, and the practicability and adaptability of equipment are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting machinery, and particularly relates to a rotating arm device of a crane. Background Art

[0002] As the main working mechanism of a crane, the boom mainly changes the boom length through the movement of the boom cylinder telescopic mechanism to achieve working conditions with different amplitudes. At present, folding boom cranes generally use a first luffing cylinder and a second luffing cylinder to adjust the boom's load lifting direction. When the existing folding boom cranes adjust the boom's load lifting direction, due to the limitation of the adjustment methods of the first luffing cylinder and the second luffing cylinder, in some specific working conditions, such as narrow spaces between floors, factories with many obstacles, etc., the operation of the crane is restricted and it cannot flexibly respond to various working environments. Especially in the case of needing to cross obstacles, the hoisting operation becomes difficult. In addition, the traditional adjustment method may also lead to the limitation of the working amplitude of the boom, thereby affecting the flexibility and efficiency of the hoisting operation. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art, and provides a rotating arm device of a crane. Through the cooperation of the rotating arm shaft and the rotating arm mounting seat, when it is necessary to cross obstacles, the installation angle of the rotating arm can be adjusted, avoiding the limitation of the working amplitude of the boom, and increasing the flexibility and efficiency of the hoisting operation.

[0004] To achieve the above purpose, the utility model provides a rotating arm device of a crane. The crane includes a boom assembly, and the boom assembly includes at least one minimum boom. The rotating arm device of the crane includes:

[0005] A manual arm, which is fixed on the minimum boom;

[0006] A rotating arm mounting seat, which is sleeved on one end of the manual arm;

[0007] Two rotating arm shafts for fixing the rotating arm;

[0008] A rotating arm, two fourth mounting holes are arranged at the arm tail of the rotating arm. The rotating arm is fixed on the rotating arm mounting seat by respectively passing two rotating arm shafts through the two fourth mounting holes, and

[0009] A hook, which is connected to the arm head of the rotating arm;

[0010] A plurality of first mounting holes corresponding to the rotary arm shaft are provided on the rotary arm mounting base, and the plurality of first mounting holes are arranged along the arc of the outer edge of the rotary arm mounting base, and the shortest distance between any two groups of first mounting holes is equal to the distance between the two fourth mounting holes, so as to adjust the mounting angle of the rotary arm.

[0011] Further, three groups of first mounting holes are provided, and the two rotary arm shafts respectively pass through the two fourth mounting holes to fix the rotary arm, and form three mounting angles of the rotary arm rotating upward, horizontally, and downward relative to the manual arm, so as to adapt to three hoisting states of the crane rotary arm device for upward hoisting, parallel hoisting, and downward hoisting.

[0012] Further, the crane rotary arm device further includes:

[0013] A manual arm shaft for fixing the manual arm on the smallest arm.

[0014] Further, a plurality of second mounting holes corresponding to the manual arm shaft are provided on the manual arm to adjust the telescopic length of the manual arm along the axial direction of the smallest arm.

[0015] Further, the crane rotary arm device further includes:

[0016] A hook shaft for connecting the hook to the arm head of the rotary arm.

[0017] Further, a third mounting hole corresponding to the hook shaft is provided on the arm head of the rotary arm for mounting the hook.

[0018] Further, handles are provided on both the manual arm shaft and the rotary arm shaft to facilitate disassembly and assembly by the operator.

[0019] Compared with the prior art, the beneficial effects achieved by the present utility model are:

[0020] (1) The present utility model has a rotary arm mounted on the head of the manual arm. The mounting angle of the rotary arm can be changed by adjusting the mounting positions of the two rotary arm shafts and the plurality of mounting holes. According to the actual working conditions, the rotary arm can be adjusted to rotate upward, horizontally, or downward, thereby changing the hoisting angle and enhancing the ability to cross obstacles.

[0021] (2) The present utility model adds a manual arm to the smallest arm of the telescopic arm structure, which can effectively increase the full extension length of the arm body and expand the working range, and solves the problem of small working range of the arm body caused by the inability to arrange the oil cylinder.

[0022] In summary, the present utility model has strong obstacle-crossing ability and complex working condition adaptability, and can perform efficient hoisting operations in a narrow space or an environment with many obstacles. Brief Description of the Drawings

[0023] Figure 1 is a schematic structural view of the slewing arm device of the folding boom crane provided by an embodiment of the present utility model;

[0024] Figure 2 is a side view of the slewing arm device of the folding boom crane provided by an embodiment of the present utility model;

[0025] Figure 3 is a schematic view of the first state of the slewing arm device of the folding boom crane provided by an embodiment of the present utility model;

[0026] Figure 4 is a schematic view of the second state of the slewing arm device of the folding boom crane provided by an embodiment of the present utility model;

[0027] Reference Numeral Description: 1, manual arm; 2, manual arm shaft; 3, slewing arm shaft; 4, slewing arm; 5, hook shaft; 6, hook; 7, slewing arm mounting seat. Detailed Description of the Preferred Embodiment

[0028] The present utility model will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, and should not be used to limit the protection scope of the present utility model.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0030] In the description of the utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] AsFigure 1 As shown in the figure, this embodiment provides a crane slewing arm device. The crane includes a boom assembly, and the boom assembly includes at least one minimum boom. The crane slewing arm device includes:

[0032] A manual arm 1, which is fixed on the minimum boom;

[0033] A slewing arm mounting base 7, which is sleeved on one end of the manual arm 1;

[0034] Two slewing arm shafts 3 for fixing the slewing arm 4;

[0035] A slewing arm 4. Two fourth mounting holes are provided at the tail of the slewing arm 4. The slewing arm 4 is fixed on the slewing arm mounting base 7 by passing two slewing arm shafts 3 through the two fourth mounting holes respectively. And,

[0036] A hook 6, which is connected to the head of the slewing arm 4;

[0037] Multiple groups of first mounting holes are provided on the slewing arm mounting base 7 corresponding to the slewing arm shafts 3. The multiple groups of first mounting holes are arranged along the arc of the outer edge of the slewing arm mounting base 7, and the shortest distance between any two groups of first mounting holes is equal to the distance between the two fourth mounting holes to adjust the mounting angle of the slewing arm 4.

[0038] Specifically, as Figures 2 - 4 shown, three groups of first mounting holes are provided. Two slewing arm shafts 3 pass through the two fourth mounting holes respectively to fix the slewing arm 4, and three mounting angles of the slewing arm 4 rotating upward, horizontally, and downward relative to the manual arm 1 are formed to adapt to the three hoisting states of the crane slewing arm device for upward hoisting, parallel hoisting, and downward hoisting.

[0039] Further, the crane slewing arm device further includes a manual arm shaft 2, which is used to fix the manual arm 1 on the minimum boom.

[0040] Specifically, multiple groups of second mounting holes are provided on the manual arm 1 corresponding to the manual arm shaft 2 to adjust the telescopic length of the manual arm 1 along the axial direction of the minimum boom.

[0041] Further, the crane slewing arm device further includes a hook shaft 5, which is used to connect the hook 6 to the head of the slewing arm 4.

[0042] Specifically, a third mounting hole is provided at the head of the slewing arm 4 corresponding to the hook shaft 5 for installing the hook 6.

[0043] Preferably, handles are provided on both the manual arm shaft 2 and the slewing arm shaft 3 to facilitate disassembly and assembly by the operator.

[0044] When in use, when the heavy object is at a high distance from the hoisting point and the boom assembly cannot be adjusted up and down due to obstacles, it can be pressed according to Figure 3As shown, remove the rotating arm shaft 3, rotate the rotating arm 4 upward so that the two fourth mounting holes are respectively aligned with the two groups of first mounting holes, and fix them with the rotating arm shaft 3, thereby effectively solving the hoisting situation where the heavy object is relatively high and the boom assembly is restricted. If the working range cannot meet the requirements, the manual arm shaft 2 can be removed, the manual arm 1 can be extended, and the working range can be adjusted to any position of the second mounting hole. After selecting the position, use the manual arm shaft 2 to fix it on the smallest arm;

[0045] When the heavy object is at a relatively low distance from the hoisting point and the boom assembly cannot be adjusted up and down due to obstacles, it can be carried out according to Figure 4 As shown, remove the upper rotating arm shaft 3, rotate the rotating arm 4 downward so that the two fourth mounting holes are respectively aligned with the two groups of first mounting holes, and fix them with the rotating arm shaft 3, thereby effectively solving the hoisting situation where the heavy object is relatively low and the boom assembly is restricted. If the working range cannot meet the requirements, the manual arm shaft 2 can be removed, the manual arm 1 can be extended, and the working range can be adjusted to any position of the second mounting hole. After selecting the position, use the manual arm shaft 2 to fix it on the smallest arm.

[0046] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A crane slewing arm device, characterized in that, The crane includes a boom assembly, the boom assembly includes at least one minimum boom, and the crane slewing arm device includes: A manual arm (1), which is fixed on the minimum boom; A slewing arm mounting seat (7), which is sleeved at one end of the manual arm (1); Two slewing arm shafts (3) for fixing the slewing arm (4); A slewing arm (4), two fourth mounting holes are provided at the tail of the slewing arm (4), and the slewing arm (4) is fixed on the slewing arm mounting seat (7) by passing the two slewing arm shafts (3) through the two fourth mounting holes respectively, and, A hook (6), which is connected to the head of the slewing arm (4); Multiple groups of first mounting holes are provided on the slewing arm mounting seat (7) corresponding to the slewing arm shafts (3), and the multiple groups of first mounting holes are arranged along the arc of the outer edge of the slewing arm mounting seat (7), and the shortest distance between any two groups of first mounting holes is equal to the distance between the two fourth mounting holes, so as to adjust the mounting angle of the slewing arm (4).

2. The crane slewing arm device according to claim 1, characterized in that, There are three groups of the first mounting holes. The two slewing arm shafts (3) respectively pass through the two fourth mounting holes to fix the slewing arm (4), and form three mounting angles of the slewing arm (4) rotating upward, horizontally, and downward relative to the manual arm (1).

3. The crane slewing arm device according to claim 1, characterized in that, The crane slewing arm device further includes: A manual arm shaft (2) for fixing the manual arm (1) on the minimum boom.

4. The crane slewing jib device according to claim 3, characterized in that, Multiple groups of second mounting holes are provided on the manual arm (1) corresponding to the manual arm shaft (2) to adjust the telescopic length of the manual arm (1) along the axial direction of the minimum boom.

5. The crane slewing arm device according to claim 1, characterized in that, The crane slewing arm device further includes: A hook shaft (5) for connecting the hook (6) to the head of the slewing arm (4).

6. The crane slewing jib device according to claim 5, characterized in that, A third mounting hole is provided at the head of the slewing arm (4) corresponding to the hook shaft (5) for mounting the hook (6).

7. The crane slewing jib device according to claim 3, characterized in that, Handles are provided on both the manual arm shaft (2) and the slewing arm shaft (3) to facilitate disassembly and assembly by the operator.

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