Arm segment packaging positioning fixture and arm segment packaging structure

Abstract

This application relates to the field of engineering machinery and discloses a boom section packaging and positioning fixture and a boom section packaging structure. The boom section packaging and positioning fixture is used to position a horizontally placed first boom section, which includes a first upper chord, a first lower chord, and a first diagonal web member. Specifically, it includes: a first limiting structure with a first limiting surface in contact with the surface of the first upper chord, which supports and limits the first upper chord; a second limiting structure, recessed relative to the first limiting structure; a second limiting surface in contact with the surface of the first lower chord, which supports and limits the first lower chord; the second limiting surface and the first limiting surface together ensure the first diagonal web member is in a horizontal position; and a base located at the bottom of the first boom section, one end of which is fixed to the first limiting structure, and the other end of which has a recessed structure to fix the second limiting structure. This application solves the problem of packaging horizontally placed boom sections, achieving structural stability and preventing damage to the boom section after packaging.

Description

Technical Field

[0001] This application belongs to the field of engineering machinery, and specifically relates to a boom segment packaging and positioning fixture and a boom segment packaging structure. Background Technology

[0002] The boom is a core component of tower cranes, assembled from multiple single-arm sections. Each boom section is typically designed with an isosceles triangular cross-section. Tower cranes often require multiple relocations throughout their lifespan. To fully utilize transport space, reduce logistics costs, improve transport reliability, and minimize the risk of cargo damage during transport, the packaging structure or method of the boom sections has become an important research topic.

[0003] In existing technologies, such as Figure 1 As shown, one packaging structure involves placing two arm sections vertically and securing them together, one facing forward and the other backward. This results in a larger overall height and smaller width after packaging. Another packaging structure involves placing two arm sections horizontally and securing them together, one facing forward and the other backward. This results in a smaller overall height and larger width after packaging. These two packaging structures are suited to different transportation space requirements. For the horizontally placed arm section, due to the shape and position of the chord A, the diagonal web member B of the arm section forms a certain angle with the supporting surface, preventing a completely horizontal placement. This leads to poor structural stability after packaging and a tendency for slippage and loosening during transportation. Furthermore, the chord A and the supporting surface experience point-to-line stress, making chord A susceptible to damage during transport. Summary of the Invention

[0004] The purpose of this application is to provide a positioning fixture and a packaging structure for arm segments, which can solve the problem of packaging horizontally placed arm segments and achieve the effect of stable structure after packaging without damaging the arm segments.

[0005] To achieve the above objectives, this application provides a boom segment packaging and positioning fixture for positioning a first boom segment placed laterally. The first boom segment includes a first upper chord, a first lower chord, and a first inclined web member connecting the first upper chord and the first lower chord; specifically including:

[0006] The first limiting structure has a first limiting surface that contacts the surface of the first upper chord, and the first limiting surface is used to support and limit the first upper chord.

[0007] The second limiting structure is arranged to be recessed relative to the first limiting structure; it is provided with a second limiting surface that contacts the surface of the first lower chord, the second limiting surface is used to support and limit the first lower chord; the second limiting surface and the first limiting surface together make the first diagonal web member horizontal.

[0008] The base is located at the bottom of the first arm section. One end of the base is fixed to the first limiting structure, and the other end is provided with a sinking structure to fix the second limiting structure.

[0009] In some embodiments, the second limiting structure includes: a limiting plate and an angle adjustment mechanism; the limiting plate is inclined relative to the horizontal plane, and its surface forms a second limiting surface for supporting and limiting the first lower chord; the angle adjustment mechanism is used to adjust the tilt angle of the limiting plate.

[0010] In some embodiments, the angle adjustment mechanism includes: a first screw and a first nut, the first screw being vertically fixed to the sinking structure by the first nut; one end of the limiting plate is hinged to the sinking structure, and the other end is attached to the top of the first screw.

[0011] In some embodiments, the first limiting structure includes a limiting block having an inclined surface that is tilted relative to a horizontal plane, the inclined surface forming a first limiting surface for supporting and limiting the first upper chord.

[0012] In some embodiments, the first limiting surface and the second limiting surface form a "V"-shaped support for the first upper chord and the first lower chord of the first arm segment.

[0013] In some embodiments, a length adjustment mechanism is also included, which is used to adjust the lateral distance between the first limiting structure and the second limiting structure.

[0014] In some embodiments, the base includes a first base and a second base, the first base fixing the first limiting structure, and the second base having the sinking structure to fix the second limiting structure;

[0015] The length adjustment mechanism includes a double-ended screw and a second nut. The two ends of the double-ended screw are threadedly connected to the first base and the second base, respectively. The second nut secures the double-ended screw to its adjusted position after extension and retraction.

[0016] In some embodiments, the bottom of the base is provided with a limiting groove for stacking and embedding.

[0017] The second aspect of this application provides a boom-segment packaging structure, including: a first boom segment, a second boom segment, and the aforementioned boom-segment packaging positioning fixture;

[0018] The first and second arm sections are packaged and fixed in a snap-fit ​​configuration and placed laterally on the arm section packaging and positioning fixture; the second arm section includes a second lower chord.

[0019] The first limiting surface extends to one side along the contact surface with the first upper chord, and the first limiting surface simultaneously supports and limits the first upper chord and the second lower chord.

[0020] A third aspect of this application provides a boom-shaped packaging structure, including: a first boom, a second boom, a third boom, a fourth boom, and the aforementioned boom-shaped packaging positioning fixture;

[0021] The first and second arm sections are packaged and fixed in a snap-fit ​​configuration and placed laterally on the arm section packaging and positioning fixture.

[0022] The third and fourth arm sections are packaged and fixed in a snap-fit ​​configuration and placed vertically; the fourth arm section includes a fourth lower chord.

[0023] The limiting groove of the arm section packaging and positioning fixture is embedded in the fourth lower chord, so that the first arm section and the second arm section, which are placed horizontally, are stacked above the third arm section and the fourth arm section, which are placed vertically.

[0024] Compared with the prior art, the beneficial effects of this application are as follows:

[0025] This application uses a first limiting structure and a second limiting structure, one high and one low, to support and limit the first upper chord and the first lower chord of the first arm section, respectively, so that the first arm section is placed and fixed in a completely horizontal position. By having the first limiting surface and the second limiting surface make surface contact with the first upper chord and the first lower chord, the pressure on the chord surface is reduced, thereby solving the problem of packaging the horizontally placed arm section and achieving the effect of structural stability and no damage to the arm section after packaging.

[0026] This application supports and limits the first upper chord and the second lower chord simultaneously by extending the first limiting surface, reducing the compression of the first arm section by the second arm section, preventing the relative slippage and loosening of the second arm section, further reducing damage to the arm section during packaging and transportation, and enhancing the stability of the arm section packaging structure.

[0027] This application uses a segmented packaging and positioning fixture to stack the first and second segments, which are placed horizontally, above the third and fourth segments, which are placed vertically, forming a double-layered segmented packaging structure that combines horizontal and vertical placement, thereby making full use of different transport spaces.

[0028] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0029] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0030] Figure 1 These are two existing arm-joint packaging structures.

[0031] Figure 2 This is a schematic diagram of a boom-shaped packaging structure according to a specific embodiment of this application.

[0032] Figure 3 This is a structural diagram of the arm segment packaging and positioning fixture according to a specific embodiment of this application.

[0033] Figure 4 for Figure 3 Sectional views at AA and BB.

[0034] Figure 5 This is a schematic diagram of another arm-joint packaging structure according to a specific embodiment of this application.

[0035] Figure 6 This is a schematic diagram of the semi-trailer transport space according to a specific embodiment of this application.

[0036] Explanation of reference numerals in the attached drawings: First limiting structure 1, First limiting surface 11, Limiting block 12, Second limiting structure 2, Second limiting surface 21, Limiting plate 22, Angle adjustment mechanism 23, First screw 231, First nut 232, Base 3, First base 31, Second base 32, Sinking structure 33, Length adjustment mechanism 4, Double-ended screw 41, Second nut 42, Limiting groove 5, Support leg 51, First arm section 6, First upper chord 61, First lower chord 62, First oblique web bar 63, Second arm section 7, Second lower chord 72, Third arm section 8, Fourth arm section 9, Fourth lower chord 92. Detailed Implementation

[0037] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0038] like Figure 2 , Figure 3 , Figure 4 As shown, a boom segment packaging and positioning fixture is used to position a first boom segment 6 placed laterally. The first boom segment 6 includes a first upper chord 61, a first lower chord 62, and a first inclined web member 63 connecting the first upper chord 61 and the first lower chord 62. Specifically, it includes:

[0039] The first limiting structure 1 is provided with a first limiting surface 11 that contacts the surface of the first upper chord 61. The first limiting surface 11 is used to support and limit the first upper chord 61.

[0040] The second limiting structure 2 is arranged to be recessed relative to the first limiting structure 1; it is provided with a second limiting surface 21 that contacts the surface of the first lower chord 62, and the second limiting surface 21 is used to support and limit the first lower chord 62; the second limiting surface 21 and the first limiting surface 11 together make the first diagonal web member 63 in a horizontal position.

[0041] The base 3 is located at the bottom of the first arm section 6. One end of the base is fixed to the first limiting structure 1, and the other end is provided with a sinking structure 33 to fix the second limiting structure 2.

[0042] In this application, the first arm section 6 and the second arm section 7 are packaged and fixed in a forward and reverse interlocking configuration and placed laterally on the arm section packaging positioning fixture. The first limiting structure 1 and the second limiting structure 2 provide support and limitation from the two ends of the first arm section 6, namely the first upper chord 61 and the first lower chord 62, respectively, to prevent the first arm section 6 from slipping. Furthermore, the height difference between the first limiting structure 1 and the second limiting structure 2 offsets the vertical height difference between the first upper chord 61 and the first lower chord 62, allowing the first diagonal brace 63 to be in a completely horizontal position, thereby stabilizing the packaged arm section structure and reducing the risk of the second arm section 7 slipping or loosening. Secondly, the first limiting structure 1 contacts the surface of the first upper chord 61 through the first limiting surface 11, and the second limiting structure 2 contacts the surface of the first lower chord 62 through the second limiting surface 21, reducing pressure on the chord surfaces and preventing damage to the arm section during transportation. Furthermore, the shapes of the first limiting surface 11 and the second limiting surface 21 are determined by the shapes of the first upper chord 61 and the first lower chord 62 of the first arm section 6, and need to be able to support and limit the first upper chord 61 and the first lower chord 62.

[0043] Specifically, the first limiting surface 11 and the second limiting surface 21 form a "V"-shaped support for the first upper chord 61 and the first lower chord 62 of the first arm section 6. Both the first limiting surface 11 and the second limiting surface 21 are inclined surfaces. The first limiting surface 11 supports the first upper chord 61 while preventing it from moving to one side, and the second limiting surface 21 supports the first lower chord 62 while preventing it from moving to the other side. The first limiting surface 11 and the second limiting surface 21 support the first arm section 6 while restricting its lateral movement.

[0044] In some embodiments, both the first limiting surface 11 and the second limiting surface 21 are inclined planes. The inclination angle of the first limiting surface 11 is the same as the inclination angle of the contact surface when the first upper chord 61 is placed laterally; the inclination angle of the second limiting surface 21 is the same as the inclination angle of the contact surface when the first lower chord 62 is placed laterally. Optionally, the surface of the base 3 can additionally support the first upper chord 61 or the first lower chord 62. Two arm section packaging and positioning fixtures are spaced apart along the length direction of the first arm section 6.

[0045] Specifically, the second limiting structure 2 includes a limiting plate 22 and an angle adjustment mechanism 23. The limiting plate 22 is inclined relative to the horizontal plane, and its surface forms a second limiting surface 21 for supporting and limiting the first lower chord 62. The angle adjustment mechanism 23 is used to adjust the tilt angle of the limiting plate 22. Adjusting the tilt angle of the limiting plate 22, that is, the tilt angle of the second limiting surface 21, can adjust the placement angle of the first arm section 6 and wed the first arm section 6 tightly with the first limiting surface 11.

[0046] Furthermore, the angle adjustment mechanism 23 includes a first screw 231 and a first nut 232. The first screw 231 is vertically fixed to the sinking structure 33 by the first nut 232. One end of the limiting plate 22 is hinged to the sinking structure 33, and the other end is attached to the top of the first screw 231. The tilt angle of the limiting plate 22 can be adjusted by adjusting the height of the top of the first screw 231.

[0047] In some embodiments, the first screw 231 passes through a through hole in the recessed structure 33, and two first nuts 232 vertically fix the first screw 231 to the recessed structure 33. After loosening the first nuts 232, the height of its top can be adjusted by rotating the first screw 231.

[0048] Specifically, the first limiting structure 1 includes a limiting block 12, which has an inclined surface that is tilted relative to the horizontal plane. The inclined surface forms a first limiting surface 11 for supporting and limiting the first upper chord 61.

[0049] Specifically, it also includes a length adjustment mechanism 4, which is used to adjust the lateral distance between the first limiting structure 1 and the second limiting structure 2. The first arm section 6 typically has various height specifications, resulting in different distances between its first upper chord 61 and first lower chord 62. The length adjustment mechanism 4 adjusts the lateral distance between the first limiting structure 1 and the second limiting structure 2, enabling its first limiting surface 11 and second limiting surface 21 to accommodate the first upper chord 61 and first lower chord 62 of the first arm section 6 with different height specifications.

[0050] Specifically, the base 3 includes a first base 31 and a second base 32. The first base 31 fixes the first limiting structure 1, and the second base 32 is provided with a sinking structure 33 to fix the second limiting structure 2. The length adjustment mechanism 4 includes a double-ended screw 41 and a second nut 42. The two ends of the double-ended screw 41 are threadedly connected to the first base 31 and the second base 32, respectively. The second nut 42 tightens the double-ended screw 41 to the adjusted position after extension and retraction. By adjusting its extension and retraction on the first base 31 and the second base 32, the second nut 42 causes the base 3 to extend or shorten laterally, thereby adjusting the lateral distance between the first limiting structure 1 and the second limiting structure 2.

[0051] In some embodiments, the threads at both ends of the double-ended screw 41 rotate in opposite directions. Two second nuts 42 respectively secure the connection between the double-ended screw 41 and the first base 31, and the connection between the double-ended screw 41 and the second base 32. After loosening the second nuts 42, the double-ended screw 41 can be rotated so that both ends simultaneously extend from the first base 31 and the second base 32, or simultaneously retract into the first base 31 and the second base 32.

[0052] Specifically, the bottom of the base 3 is provided with a limiting groove 5 for palletizing and embedding. The limiting groove 5 can increase the stability of the arm section packaging positioning tooling during palletizing.

[0053] In some embodiments, the bottom of the base 3 is provided with a support leg 51, and a limiting groove 5 is formed between the surface of the base 3 and the support leg 51.

[0054] like Figure 2 As shown, a boom-type packaging structure includes: a first boom 6, a second boom 7, and the aforementioned boom-type packaging positioning fixture;

[0055] The first arm section 6 and the second arm section 7 are packaged and fixed in a forward and reverse interlocking manner and placed laterally on the arm section packaging positioning fixture; the second arm section 7 includes the second lower chord 72.

[0056] The first limiting surface 11 extends to one side along the contact surface with the first upper chord 61, and the first limiting surface 11 simultaneously supports and limits the first upper chord 61 and the second lower chord 72.

[0057] In this application, the second lower chord 72 of the second arm section 7 is stacked on the first upper chord 61 of the first arm section 6, and the first limiting surface 11 extends upward along the contact surface with the first upper chord 61. The extended and enlarged first limiting surface 11 provides support for the second lower chord 72, reduces the compression of the second arm section 7 on the first arm section 6, and avoids damage to the first upper chord 61; at the same time, the first limiting surface 11 limits the second lower chord 72, preventing the second arm section 7 from sliding and loosening relative to the first arm section 6, and further enhances the structural stability of the arm section after packaging.

[0058] like Figure 5As shown, a boom-shaped packaging structure includes: a first boom 6, a second boom 7, a third boom 8, a fourth boom 9, and the aforementioned boom-shaped packaging positioning fixture.

[0059] The first arm segment 6 and the second arm segment 7 are packaged and fixed in a front-back interlocking manner and placed horizontally on the arm segment packaging positioning fixture.

[0060] The third arm section 8 and the fourth arm section 9 are packaged and fixed in a forward and reverse interlocking manner and placed vertically; the fourth arm section 9 includes the fourth lower chord 92;

[0061] The limiting groove 5 of the arm section packaging positioning fixture is embedded in the fourth lower chord 92, so that the first arm section 6 and the second arm section 7, which are placed horizontally, are stacked above the third arm section 8 and the fourth arm section 9, which are placed vertically.

[0062] In this application, the fourth arm section 9 is counter-engaged between two parallel, vertically placed third arm sections 8, forming a counter-engaged configuration. An arm section packaging and positioning fixture is placed above the fourth arm section 9, with its limiting groove 5 embedded in the fourth lower chord 92. The first arm section 6 and the second arm section 7 are placed laterally on the arm section packaging and positioning fixture, forming a double-layer arm section packaging structure combining lateral and vertical placement, thus fully utilizing different transport spaces. The limiting groove 5 and the fourth lower chord 92 are interlocked, enhancing the overall stability of the double-layer arm section packaging structure and reducing the risk of loose packaging and damage. Furthermore, compared to the laterally placed first arm section 6 being directly stacked on the fourth arm section 9, the first arm section 6 is stacked on the fourth arm section 9 through the arm section packaging and positioning fixture, avoiding stress on the first diagonal web member 63, which is a non-load-bearing member, thus preventing bending deformation of the first diagonal web member 63.

[0063] In some embodiments, such as Figure 6 As shown, taking the transport space of a semi-trailer as an example, two third boom sections 8 and one fourth boom section 9 are packaged and fixed in a forward and reverse interlocking manner and placed vertically to form a set of vertical boom sections. One first boom section 6 and one second boom section 7 are packaged and fixed in a forward and reverse interlocking manner and placed horizontally on the boom section packaging positioning fixture to form a set of horizontal boom sections. One set of vertical boom sections is assembled into the front of the semi-trailer body, and another set of vertical boom sections is assembled into the rear of the semi-trailer body. There is a space C above the vertical boom section set at the rear of the semi-trailer body. A set of horizontal boom sections is assembled into space C, forming a double-layer boom section packaging structure with the vertical boom section set; thus, the transport space of the semi-trailer body is fully utilized, and transportation costs are reduced.

[0064] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0065] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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, an electrical connection, or a connection that allows communication between components; 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0067] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A boom segment packaging and positioning fixture for positioning a first boom segment (6) placed laterally, the first boom segment (6) comprising a first upper chord (61), a first lower chord (62), and a first inclined web member (63) connecting the first upper chord (61) and the first lower chord (62); characterized in that, include: The first limiting structure (1) is provided with a first limiting surface (11) that contacts the surface of the first upper chord (61). The first limiting surface (11) is used to support and limit the first upper chord (61). The second limiting structure (2) is arranged to be recessed relative to the first limiting structure (1); it is provided with a second limiting surface (21) that contacts the surface of the first lower chord (62), the second limiting surface (21) is used to support and limit the first lower chord (62); the second limiting surface (21) and the first limiting surface (11) together make the first diagonal web member (63) horizontal; The base (3) is located at the bottom of the first arm section (6). One end of the base is fixed to the first limiting structure (1), and the other end is provided with a sinking structure (33) to fix the second limiting structure (2). The base (3) includes a first base (31) and a second base (32). The first base (31) fixes the first limiting structure (1), and the second base (32) is provided with the sinking structure (33) to fix the second limiting structure (2). The second limiting structure (2) includes a limiting plate (22) and an angle adjustment mechanism (23). The limiting plate (22) is inclined relative to the horizontal plane, and its surface forms a second limiting surface (21) for supporting and limiting the first lower chord (62). The angle adjustment mechanism (23) is used to adjust the tilt angle of the limiting plate (22). The length adjustment mechanism (4) is used to adjust the lateral distance between the first limiting structure (1) and the second limiting structure (2); The length adjustment mechanism (4) includes a double-ended screw (41) and a second nut (42). The two ends of the double-ended screw (41) are threadedly connected to the first base (31) and the second base (32) respectively. The second nut (42) secures the double-ended screw (41) to the position after extension and retraction adjustment.

2. The arm segment packaging and positioning fixture according to claim 1, characterized in that, The angle adjustment mechanism (23) includes: a first screw (231) and a first nut (232), wherein the first screw (231) is vertically fixed on the sinking structure (33) by the first nut (232); one end of the limiting plate (22) is hinged to the sinking structure (33), and the other end is attached to the top of the first screw (231).

3. The arm segment packaging and positioning fixture according to claim 1, characterized in that, The first limiting structure (1) includes a limiting block (12), which has an inclined surface that is inclined relative to the horizontal plane. The inclined surface forms the first limiting surface (11) for supporting and limiting the first upper chord (61).

4. The arm segment packaging and positioning fixture according to claim 3, characterized in that, The first limiting surface (11) and the second limiting surface (21) form a "V"-shaped support for the first upper chord (61) and the first lower chord (62) of the first arm section (6).

5. The arm segment packaging and positioning fixture according to any one of claims 1 to 4, characterized in that, The bottom of the base (3) is provided with a limiting groove (5) for stacking and embedding.

6. A boom-joint packaging structure, characterized in that, include: The first arm segment (6), the second arm segment (7), and the arm segment packaging and positioning fixture as described in any one of claims 1 to 5; The first arm section (6) and the second arm section (7) are packaged and fixed in a front-back interlocking manner and placed laterally on the arm section packaging and positioning fixture; the second arm section (7) includes a second lower chord (72). The first limiting surface (11) extends to one side along the contact surface with the first upper chord (61), and the first limiting surface (11) simultaneously supports and limits the first upper chord (61) and the second lower chord (72).

7. A boom-joint packaging structure, characterized in that, include: The first arm segment (6), the second arm segment (7), the third arm segment (8), the fourth arm segment (9), and the arm segment packaging and positioning fixture as described in claim 5; The first arm section (6) and the second arm section (7) are packaged and fixed in a front-back interlocking manner and placed horizontally on the arm section packaging and positioning fixture; The third arm section (8) and the fourth arm section (9) are packaged and fixed in a front-back interlocking manner and placed vertically; the fourth arm section (9) includes a fourth lower chord (92). The limiting groove (5) of the arm section packaging positioning fixture is embedded in the fourth lower chord (92), so that the first arm section (6) and the second arm section (7) placed horizontally are stacked above the third arm section (8) and the fourth arm section (9) placed vertically.

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