Tower crane A-shaped frame and tower crane

Abstract

The utility model relates to the technical field of building machinery, and discloses a tower crane A-shaped frame and a tower crane. The tower crane A-shaped frame comprises a rear supporting rod frame which is vertically arranged; the front supporting rod frame is pivotally connected with the front supporting rod frame; the supporting rod seat is pivotally arranged on the rear supporting rod frame; the inclined supporting rod is arranged parallel to the vertical plane; wherein the front supporting rod frame and the rear supporting rod frame extend downwards in a flaring shape and are symmetrically arranged relative to a vertical plane, one end of the inclined supporting rod is detachably connected with the supporting rod seat, and the other end of the inclined supporting rod is detachably connected with the front supporting rod frame. The tower crane comprises the A-shaped frame of the tower crane. According to the A-shaped frame of the tower crane, the front supporting rod frame and the rear supporting rod frame only need to be aligned with the end parts of the inclined supporting rods in the height direction, and the alignment in the transverse direction does not need to be considered, so that the inclined supporting rods are convenient to mount.

Description

Technical Field

[0001] This application belongs to the technical field of construction machinery, and specifically, relates to a tower crane A-frame and a tower crane. Background Art

[0002] The tower crane A-frame is an important component of a luffing jib tower crane and plays an important role in the luffing operation of the tower crane. As Figure 1 shown, the tower crane A-frame includes a front strut frame, a rear strut frame, and a diagonal strut. Among them, one end of the diagonal strut is used to abut against the front strut frame, and the other end is used to abut against the rear strut frame, so as to ensure the angular relationship between the front strut frame and the rear strut frame.

[0003] However, the tower crane A-frame is of a spindle structure. When the two ends of the diagonal strut are connected to the front strut frame and the rear strut frame, it is necessary to consider not only alignment with the front strut frame and the rear strut frame in the height direction, but also alignment with the front strut frame and the rear strut frame in the lateral direction, resulting in difficult installation of the diagonal strut. Summary of the Utility Model

[0004] The purpose of this application is to provide a tower crane A-frame and a tower crane to facilitate the installation of the diagonal strut.

[0005] To achieve the above purpose, on the one hand, this application provides a tower crane A-frame, which includes:

[0006] A rear strut frame;

[0007] A front strut frame pivotally connected to one end of the rear strut frame;

[0008] A strut seat provided on the rear strut frame; and

[0009] A diagonal strut arranged parallel to the vertical plane;

[0010] Wherein, both the front strut frame and the rear strut frame are in a flared shape and are symmetrically arranged about the vertical plane. The first end of the diagonal strut is connected to the strut seat, and the second end of the diagonal strut is connected to the front strut frame.

[0011] In some embodiments, the rear strut frame includes a first rear rod and a second rear rod. The first rear rod and the second rear rod extend from the pivot connection point in opposite directions respectively, and the strut seat is rotatably arranged between the first rear rod and the second rear rod.

[0012] In some embodiments, the front strut frame includes a first front rod and a second front rod. The first front rod and the second front rod extend from the pivot connection point in opposite directions respectively. The first end of the diagonal strut is detachably connected to the strut seat, and the second end of the diagonal strut is detachably connected to one of the first front rod and the second front rod.

[0013] In some embodiments, the plane where the connection point of the diagonal brace and the brace seat is located is lower than the plane where the connection point of the diagonal brace and the front brace frame is located.

[0014] In some embodiments, the diagonal brace is a telescopic rod.

[0015] In some embodiments, both ends of the diagonal brace are provided with brace lugs arranged along the length direction of the diagonal brace, and both the brace seat and the front brace are provided with lugs, and the lugs are detachably connected to the brace lugs.

[0016] In some embodiments, the diagonal brace includes a brace body and a double-headed bolt arranged along the length direction of the brace body, and the brace lug is screwed to the end of the brace body through the double-headed bolt.

[0017] In some embodiments, the center line where the hole of the lug is located is perpendicular to the vertical plane.

[0018] In some embodiments, the A-frame of the tower crane includes a plurality of diagonal braces, and the plurality of diagonal braces are symmetrically arranged with respect to the vertical plane.

[0019] On the other hand, this application protects a tower crane, and the tower crane includes the above-mentioned A-frame of the tower crane.

[0020] In the technical solution of this application, the diagonal brace of the A-frame of the tower crane is used to fix the angular relationship between the front brace frame and the rear brace frame. The first end of the diagonal brace is connected to the front brace frame, and the second end is connected to the brace seat provided on the rear brace, and the front brace frame and the rear brace frame are symmetrically arranged with respect to the vertical plane. Compared with the setting method in the prior art where both ends of the diagonal brace are directly connected to the rear brace frame and the front brace frame, the first end of the diagonal brace of this application is connected to the brace seat, that is, the selection of the setting position of the diagonal brace is more, and the diagonal brace can be parallel to the vertical plane, that is, there is no need to be restricted by the spindle-shaped structure of the front brace frame and the rear brace frame, and it is only necessary to consider aligning the diagonal brace with the front brace frame or the brace seat in the height direction. After reducing the alignment requirement of the diagonal brace with the front brace frame or the brace seat in the transverse direction, it is convenient to install the diagonal brace.

[0021] Other features and advantages of the embodiments of this application will be described in detail in the subsequent specific embodiments section. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings are used to provide a further understanding of the embodiments of this application, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of this application, but do not constitute a limitation to the embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings. In the drawings:

[0023] Figure 1It is a schematic structural diagram of the A-frame of a tower crane in the prior art;

[0024] Figure 2 It is a schematic structural diagram of the A-frame of a tower crane according to a specific embodiment of the present application;

[0025] Figure 3 is Figure 2 a schematic structural diagram of the diagonal brace of the A-frame of the tower crane in

[0026] Description of reference numerals

[0027] S Vertical plane 220 Second front rod

[0028] 100 Rear brace frame 300 Brace seat

[0029] 110 First rear rod 400 Ear plate

[0030] 120 Second rear rod 500 Diagonal brace

[0031] 200 Front brace frame 510 Brace ear plate

[0032] 210 First front rod 520 Double-headed bolt Specific embodiments

[0033] The following describes in detail the specific embodiments of the present application with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present application, and are not used to limit the present application.

[0034] The tower crane A-frame and tower crane according to the present application will be described below with reference to the accompanying drawings.

[0035] The present application discloses a novel tower crane A-frame, as Figure 2 shown, the A-frame of the tower crane in a specific embodiment includes:

[0036] Rear brace frame 100;

[0037] A front brace frame 200 pivotally connected to one end of the rear brace frame 100;

[0038] A brace seat 300 provided on the rear brace frame 100; and

[0039] A diagonal brace 500 arranged parallel to the vertical plane S;

[0040] Wherein, both the front brace frame 200 and the rear brace frame 100 are in a flared shape and are symmetrically arranged with respect to the vertical plane S, the first end of the diagonal brace 500 is connected to the brace seat 300, and the second end of the diagonal brace 500 is connected to the front brace frame 200.

[0041] Specifically, referring toFigure 2 , to ensure the stability of the installation of the front strut frame 200 and the rear strut frame 100, both the front strut frame 200 and the rear strut frame 100 extend downward in a flared shape (i.e., in a spindle shape), and are symmetrically arranged with respect to the vertical plane S. The first end of the diagonal strut 500 is connected to the front strut frame 200, and the second end is connected to the strut seat 300 provided on the rear strut, thereby restricting the angular relationship between the front strut frame 200 and the rear strut frame 100 through the diagonal strut 500. In the prior art, as Figure 1 shown, both the rear strut frame 100 and the front strut frame 200 are arranged in a spindle shape, and both ends of the diagonal strut 500 are directly connected to the rear strut frame 100 and the front strut frame 200. Therefore, it is difficult for the diagonal strut 500 to be parallel to the vertical plane S. When connecting both ends of the diagonal strut 500 to the front strut frame 200 and the rear strut frame 100, it is necessary to simultaneously consider alignment in the height, lateral directions with the front strut frame 200 and the rear strut frame 100. Compared with the prior art, in the present application, after introducing the strut seat 300, the installation position of the diagonal strut 500 is more flexible, allowing the diagonal strut 500 to be parallel to the vertical plane S, so that it is only necessary to consider the alignment of the diagonal strut 500 with the front strut frame 200 or the strut seat 300 in the height direction, without the need for the diagonal strut 500 to be aligned with the front strut frame 200 or the strut seat 300 in the lateral direction. Therefore, the present application can facilitate the installation of the diagonal strut 500.

[0042] In the present embodiment, as Figure 2 shown, the rear strut frame 100 may include a first rear rod 110 and a second rear rod 120. The first rear rod 110 and the second rear rod 120 extend from the pivot connection point in opposite directions, and the strut seat 300 is rotatably provided between the first rear rod 110 and the second rear rod 120.

[0043] Specifically, referring to Figure 2 , the arrangement that the first rear rod 110 and the second rear rod 120 extend from the pivot connection point in opposite directions is beneficial to the stable installation of the rear strut frame 100. One end of the strut seat 300 is connected to the first rear rod 110, and the other end is connected to the second rear rod 120, and is rotatably provided at the lower end of the rear strut frame 100. The rotatable strut seat 300 enables the height position of the second end of the diagonal strut 500 to be adjusted by rotating the strut seat 300 after the diagonal strut 500 is connected to the strut seat 300, so as to facilitate alignment with the connection point of the front strut frame 200.

[0044] In the present embodiment, as Figure 2As shown, the front strut frame 200 may include a first front rod 210 and a second front rod 220. The first front rod 210 and the second front rod 220 extend from the pivot connection point in opposite directions respectively. The first end of the diagonal strut 500 is detachably connected to the strut seat 300, and the second end of the diagonal strut 500 is detachably connected to one of the first front rod 210 and the second front rod 220.

[0045] Specifically, referring to Figure 2 , the arrangement that the first front rod 210 and the second front rod 220 extend from the pivot connection point in opposite directions respectively is beneficial to the stable installation of the front strut frame 200; the first end of the diagonal strut 500 is detachably connected to the strut seat 300, such as by the hinged method of passing a fixing pin through the mounting holes of both the diagonal strut 500 and the strut seat 300; the second end of the diagonal strut 500 is detachably connected to the first front rod 210, such as by the hinged method of passing a fixing pin through the mounting holes of both the diagonal strut 500 and the first front rod 210, thus facilitating the repeated disassembly and assembly of the A-frame of the tower crane. Of course, the second end of the diagonal strut 500 can also be detachably connected to the second front rod 220.

[0046] In this embodiment, as Figure 2 shown, the plane where the connection point of the diagonal strut 500 and the strut seat 300 is located may be lower than the plane where the connection point of the diagonal strut 500 and the front strut frame 200 is located.

[0047] Specifically, referring to Figure 2 , since the rear strut frame 100 is vertically arranged, the arrangement that the plane where the connection point of the diagonal strut 500 and the strut seat 300 is located is lower than the plane where the connection point of the diagonal strut 500 and the front strut frame 200 is located can be beneficial to improving the supporting effect of the diagonal strut 500 between the front strut frame 200 and the rear strut frame 100 to ensure the reliability of the operation of the A-frame of the tower crane.

[0048] In this embodiment, as Figure 2 shown, the diagonal strut 500 may be a telescopic rod.

[0049] Specifically, referring to Figure 2 , due to the assembly error, the actual positions of the connection points of the front strut frame 200 and the rear strut frame 100 may have a certain error from the predetermined positions. The error can be compensated by adjusting the length of the diagonal strut 500, so as to ensure the smooth assembly of the diagonal strut 500 between the front strut frame 200 and the rear strut frame 100.

[0050] In this embodiment, as Figure 2 shown, strut ear plates 510 arranged along the length direction of the diagonal strut 500 may be provided at both ends of the diagonal strut 500, and ear plates 400 are provided on both the strut seat 300 and the front strut, and the ear plates 400 are detachably connected to the strut ear plates 510.

[0051] Specifically, refer to Figure 2 , the ear plate 400 includes a first ear plate and a second ear plate. The stay bar ear plate 510 and the ear plate 400 are pivotally connected. After the stay bar ear plate 510 at one end of the stay bar is fixed to the first ear plate, the stay bar can pivot relative to the fixed point, so that the stay bar ear plate 510 at the other end can be aligned with the second ear plate in the height direction. A fixing pin can be used to connect and fix the stay bar ear plate 510 and the ear plate 400. With such a setting, the structure is simple and practical, and it is conducive to quick disassembly and assembly.

[0052] In this embodiment, as Figure 3 shown, the stay bar 500 may include a stay bar body and a double-headed bolt 520 arranged along the length direction of the stay bar body. The stay bar ear plate 510 is screwed to the end of the stay bar body through the double-headed bolt 520.

[0053] Specifically, refer to Figure 2 and Figure 3 , one end of the double-headed bolt 520 arranged along the length direction of the stay bar body is screwed to the stay bar body, and the other end is screwed to the stay bar ear plate 510. With such a setting, not only can the length of the stay bar 500 be adjusted by rotating the double-headed bolt 520, but also the opening direction of the mounting hole of the stay bar ear plate 510 can be adjusted through the stay bar ear plate 510. When the length of the stay bar 500 is adjusted by rotating the double-headed bolt 520, the stay bar ear plate will also deflect accordingly, which may cause the mounting hole of the stay bar ear plate 510 to be misaligned with the mounting hole of the ear plate 400. At this time, the opening direction of the mounting hole of the stay bar ear plate 510 can be adjusted by rotating the stay bar ear plate 510 to facilitate the alignment of the mounting hole of the stay bar ear plate 510 with the mounting hole of the ear plate 400.

[0054] In this embodiment, as Figure 2 shown, the center line where the opening of the ear plate 400 is located can be perpendicular to the vertical plane S.

[0055] Specifically, refer to Figure 2 , the opening directions of the ear plate 400 and the stay bar ear plate 510 are both perpendicular to the vertical plane S. With such a setting, it is beneficial for the mounting hole of the stay bar ear plate 510 to be aligned with the mounting hole of the ear plate 400, and a certain installation error between the stay bar ear plate 510 and the ear plate 400 is allowed, reducing the assembly precision requirements and lowering the manufacturing cost.

[0056] In this embodiment, as Figure 2 shown, the A-frame of the tower crane may include a plurality of stay bars 500, and the plurality of stay bars 500 are symmetrically arranged with respect to the vertical plane S.

[0057] Specifically, refer to Figure 2 , with such a setting, not only can the load of a single stay bar 500 be reduced, but also the overall load can be evenly borne by each stay bar 500, improving the reliability of the A-frame of the tower crane.

[0058] This application discloses a new type of tower crane. The tower crane in a specific embodiment includes the above-mentioned A-frame of the tower crane.

[0059] Specifically, referring to Figure 2 , a fixed pulley block is provided at the top of the A-frame of the tower crane. The fixed pulley block and the movable pulley block of the luffing tie rod (not shown in the figure) form a gear train through the luffing rope (not shown in the figure). Taking the fixed pulley block as the force application point, the luffing rope is retracted and released, thereby realizing the luffing movement of the boom (not shown in the figure). A buffer extending forward is provided in the middle of the front strut frame 200. The buffer is provided with an elastic front end, and the elastic front end is used to abut against the boom so that the luffing movement of the boom can be buffered within a certain angle range.

[0060] In addition, this tower crane has all the technical effects brought by the above-mentioned A-frame of the tower crane, which will not be elaborated here.

[0061] In the description of this application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of this application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0062] In this application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or communicable with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

Claims

1. Tower crane A-frame, characterized in that, The A-frame of the tower crane includes: A rear strut frame (100); A front strut frame (200) pivotally connected to one end of the rear strut frame (100); A strut seat (300) provided on the rear strut frame (100); and An inclined strut (500) arranged parallel to the vertical plane (S); Wherein, both the front strut frame (200) and the rear strut frame (100) are in a flared shape and are symmetrically arranged with respect to the vertical plane (S). The first end of the inclined strut (500) is connected to the strut seat (300), and the second end of the inclined strut (500) is connected to the front strut frame (200).

2. The A-frame of the tower crane according to claim 1, wherein The rear strut frame (100) includes a first rear rod (110) and a second rear rod (120). The first rear rod (110) and the second rear rod (120) extend in opposite directions from the pivot connection point, and the strut seat (300) is rotatably provided between the first rear rod (110) and the second rear rod (120).

3. The tower crane A-frame according to claim 2, characterized in that, The front strut frame (200) includes a first front rod (210) and a second front rod (220). The first front rod (210) and the second front rod (220) extend in opposite directions from the pivot connection point. The first end of the inclined strut (500) is detachably connected to the strut seat (300), and the second end of the inclined strut (500) is detachably connected to one of the first front rod (210) and the second front rod (220).

4. The A-frame of the tower crane according to claim 3, characterized in that, The plane where the connection point of the inclined strut (500) and the strut seat (300) is located is lower than the plane where the connection point of the inclined strut (500) and the front strut frame (200) is located.

5. The A-frame of the tower crane according to claim 1, characterized in that, The inclined strut (500) is a telescopic rod.

6. The A-frame of the tower crane according to claim 5, characterized in that, Both ends of the inclined strut (500) are provided with strut ear plates (510) arranged along the length direction of the inclined strut (500). Ear plates (400) are provided on both the strut seat (300) and the front strut, and the ear plates (400) are detachably connected to the strut ear plates (510).

7. The A-frame of the tower crane according to claim 6, characterized in that, The inclined strut (500) includes a strut body and a double-headed bolt (520) arranged along the length direction of the strut body. The strut ear plate (510) is screwed to the end of the strut body through the double-headed bolt (520).

8. The tower crane A-frame according to claim 6, characterized in that, The center line where the opening of the ear plate (400) is located is perpendicular to the vertical plane (S).

9. The A-frame of the tower crane according to any one of claims 1 to 8, characterized in that, The A-frame of the tower crane includes a plurality of the inclined struts (500), and the plurality of inclined struts (500) are symmetrically arranged with respect to the vertical plane (S).

10. Tower crane, characterized in that, The tower crane includes the A-frame of the tower crane according to any one of claims 1 to 9.

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