Folding arm support

Abstract

A folding arm support relates to the technical field of engineering machinery and comprises a slewing bearing, a rotary table is fixed at the top of the slewing bearing, a first-stage pitching arm and a first connecting rod are respectively hinged to the rotary table, a second connecting rod is hinged to the position, close to the rotary table, of the first-stage pitching arm, and a first-stage pitching oil cylinder is jointly hinged to the end of the first connecting rod and the end of the second connecting rod. The folding arm frame comprises a first-stage pitching oil cylinder, a first-stage pitching arm and a second-stage pitching oil cylinder, the lever end of the first-stage pitching oil cylinder is hinged to the first-stage pitching arm, a telescopic arm assembly is installed at the end of the first-stage pitching arm in a hinged mode, the telescopic arm assembly is connected with the first-stage pitching arm through a second-stage pitching oil cylinder, and the end of the second-stage pitching oil cylinder is hinged to the telescopic arm assembly and the first-stage pitching arm. The structural layout is more compact, the transverse occupied space is small, and the interference risk generated when a four-connecting-rod mechanism is adopted is avoided.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, and in particular to a folding boom. Background Technology

[0002] In construction machinery, a four-bar linkage can be used to achieve large-angle swing of the robotic arm, shorten the length of the robotic arm when it is retracted, and increase the working height of the boom, which is the form of a folding arm.

[0003] In the prior art, the patent with authorization announcement number CN 220261014 U discloses a robotic arm device for installing steel arch frames. It has two links one and two links two, which are arranged on the outside of the turntable and the first-stage folding arm. As shown in the figure, the linkage mechanism occupies a large lateral space, and interference problems are more likely to occur when a four-bar linkage mechanism is used. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a folding boom with a more compact structural layout, less lateral space occupation, and avoids the interference risk caused by the use of a four-bar linkage mechanism, which can effectively solve the problems in the background art.

[0005] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0006] A folding boom includes a slewing bearing. A turntable is fixed to the top of the slewing bearing. A primary pitch arm and a first connecting rod are hinged to the turntable. A second connecting rod is hinged to the primary pitch arm near the turntable. A primary pitch cylinder is hinged to the ends of the first and second connecting rods. The lever end of the primary pitch cylinder is hinged to the primary pitch arm. A telescopic boom assembly is hinged to the end of the primary pitch arm. The telescopic boom assembly is connected to the primary pitch arm via a secondary pitch cylinder. The ends of the secondary pitch cylinder are hinged to both the telescopic boom assembly and the primary pitch arm.

[0007] Furthermore, the turntable is fixed to the outer ring of the slewing bearing by bolts.

[0008] Furthermore, there is one connecting rod and one connecting rod, both of which are located on the inner side of the turntable, and the connecting rod is an arc-shaped rod.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This folding boom has the following advantages: the number of its first link and second link is one, and both the first link and second link are set inside the turntable. The width of its first-stage folding arm is reduced and it is placed inside the turntable. The first-stage pitch cylinder is correspondingly retracted to the middle, the structural layout is more compact, the lateral space occupied is small, and the interference risk caused by using a four-bar linkage mechanism is avoided. Attached Figure Description

[0010] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0011] Figure 2 This is a schematic diagram of the three-dimensional rear view structure of this utility model;

[0012] Figure 3 This is a three-dimensional front view structural diagram of the present invention;

[0013] Figure 4 This is a schematic diagram of the folding boom of this utility model when extended.

[0014] In the diagram: 9-slewing bearing, 10-turntable, 11-link 1, 12-link 2, 13-first stage pitch boom, 14-first stage pitch cylinder, 15-second stage pitch cylinder, 16-telescopic boom assembly. Detailed Implementation

[0015] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0016] Please see Figure 1-4 This embodiment provides a technical solution: a folding boom, including a slewing bearing 9, a turntable 10 fixed to the top of the slewing bearing 9, a primary elevation arm 13 and a connecting rod 11 hinged to the turntable 10, a connecting rod 12 hinged to the primary elevation arm 13 near the turntable 10, a primary elevation cylinder 14 hinged to the ends of the connecting rod 11 and the connecting rod 12, the lever end of the primary elevation cylinder 14 hinged to the primary elevation arm 13, a telescopic arm assembly 16 hinged to the end of the primary elevation arm 13, the telescopic arm assembly 16 and the primary elevation arm 13 connected by a secondary elevation cylinder 15, the end of the secondary elevation cylinder 15 hinged to both the telescopic arm assembly 16 and the primary elevation arm 13. The cylinder rod end of the first-stage pitch cylinder 14 drives the first-stage pitch arm 13 to move, thereby adjusting the working angle of the first-stage pitch arm 13. The cylinder rod end of the second-stage pitch cylinder 15 drives the telescopic arm assembly 16 to move, thereby adjusting the working angle of the telescopic arm assembly 16. The turntable 10 is fixed to the outer ring of the slewing bearing 9 by bolts. There is one connecting rod 11 and one connecting rod 12. Both connecting rod 11 and connecting rod 12 are located inside the turntable 10. Connecting rod 12 is an arc-shaped rod. Its first-stage pitch arm 13 has a reduced width and is located inside the turntable 10. The first-stage pitch cylinder 14 is correspondingly retracted towards the middle. Its structural layout is more compact and occupies less lateral space, avoiding the interference risk caused by using a four-bar linkage mechanism.

[0017] The working principle of the folding boom provided by this utility model is as follows: the cylinder rod end of the first-stage tilt cylinder 14 drives the first-stage tilt arm 13 to move, thereby adjusting the working angle of the first-stage tilt arm 13; the cylinder rod end of the second-stage tilt cylinder 15 drives the telescopic arm assembly 16 to move, thereby adjusting the working angle of the telescopic arm assembly 16.

[0018] It is worth noting that the components disclosed in the above embodiments are all general standard parts or parts known to those skilled in the art, and their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0019] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. For example, a rotary connection can refer to a rotary connection through a bearing.

[0020] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A folding boom, comprising a slewing bearing (9), characterized in that: A turntable (10) is fixed to the top of the slewing bearing (9). A first-stage pitch arm (13) and a connecting rod (11) are hinged on the turntable (10). A connecting rod (12) is hinged on the first-stage pitch arm (13) near the turntable (10). A first-stage pitch cylinder (14) is hinged to the ends of the connecting rod (11) and the connecting rod (12). The lever end of the first-stage pitch cylinder (14) is hinged to the first-stage pitch arm (13). A telescopic arm assembly (16) is hinged to the end of the first-stage pitch arm (13). The telescopic arm assembly (16) is connected to the first-stage pitch arm (13) through a second-stage pitch cylinder (15). The end of the second-stage pitch cylinder (15) is hinged to the telescopic arm assembly (16) and the first-stage pitch arm (13).

2. A folding boom according to claim 1, characterized in that: The turntable (10) is fixed to the outer ring of the slewing bearing (9) by bolts.

3. A folding boom according to claim 1, characterized in that: The number of connecting rod one (11) and connecting rod two (12) is one. Both connecting rod one (11) and connecting rod two (12) are located on the inner side of the turntable (10). The connecting rod two (12) is an arc-shaped rod.

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