Anti-falling structure, telescopic arm assembly, crane and assembling method of anti-falling structure

Abstract

The invention provides an anti-falling structure, a telescopic arm assembly, a crane and an assembling method of the anti-falling structure, a first telescopic arm of the telescopic arm assembly is telescopically arranged in an opening of a second telescopic arm of the telescopic arm assembly, and the anti-falling structure of the telescopic arm assembly is arranged between the inner side of the second telescopic arm and the outer side of the first telescopic arm. The anti-falling structure of the telescopic arm assembly comprises a first anti-falling stop block and a second anti-falling stop block, wherein the first anti-falling stop block is detachably arranged on a second telescopic arm; the second anti-disengagement stop block is arranged on the first telescopic arm, and the first anti-disengagement stop block can be matched with the second anti-disengagement stop block in a stopping mode; the stop block is arranged on the second telescopic arm, the stop block is located on the side, close to the opening of the second telescopic arm, of the first anti-falling stop block, and an avoiding opening allowing the second anti-falling stop block to penetrate through is formed in the stop block. According to the technical scheme, the problem that in the related technology, mounting and dismounting operation of the telescopic arm assembly is complex is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of telescopic arms, and in particular to an anti-slip structure, a telescopic arm assembly, a crane and an assembling method of the anti-slip structure. Background Art

[0002] In order to make the distance of the operating end of the mechanical device adjustable and increase the versatility of the mechanical device, the operating end is usually set on a telescopic arm assembly. The telescopic arm assembly includes a first telescopic arm and a second telescopic arm telescopically arranged in the first telescopic arm. The second telescopic arm has an opening, and the first telescopic arm is telescopically arranged in the opening of the second telescopic arm.

[0003] In order to prevent the second telescopic arm from falling off from the first telescopic arm when the second telescopic arm is extended and retracted, and to ensure the overlap between the first telescopic arm and the second telescopic arm, an anti-slip structure is provided between the inner side of the second telescopic arm and the outer side of the first telescopic arm in the related art. The anti-slip structure in the related art includes a first stopper fixedly provided on the outer side of the first telescopic arm and a second stopper fixedly provided on the inner side of the second telescopic arm. When the second telescopic arm is extended and retracted, the first stopper can cooperate with the second stopper to prevent the second telescopic arm from falling off from the first telescopic arm.

[0004] However, since the first stopper and the second stopper in the related art are both fixed by welding, when the second telescopic arm needs to be removed from the first telescopic arm for inspection, the first stopper or the second stopper needs to be cut and then welded and fixed after inspection, which makes the installation and disassembly of the telescopic arm assembly more complicated. Summary of the invention

[0005] The main purpose of the present invention is to provide an anti-slip structure, a telescopic arm assembly, a crane and an assembly method of the anti-slip structure, so as to solve the problem that the installation and disassembly operations of the telescopic arm assembly in the related art are relatively complicated.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, an anti-slip structure of a telescopic arm assembly is provided, wherein the first telescopic arm of the telescopic arm assembly is telescopically arranged in an opening of the second telescopic arm of the telescopic arm assembly, and the anti-slip structure of the telescopic arm assembly is arranged between the inner side of the second telescopic arm and the outer side of the first telescopic arm, and the anti-slip structure of the telescopic arm assembly comprises: a first anti-slip block, which is detachably arranged on the second telescopic arm; a second anti-slip block, which is arranged on the first telescopic arm, and the first anti-slip block can cooperate with the second anti-slip block stopper; a stop block, which is arranged on the second telescopic arm, and the stop block is located on a side of the first anti-slip block close to the opening of the second telescopic arm, and the stop block is provided with an avoidance opening for the second anti-slip block to pass through.

[0007] Furthermore, the stop block includes a first block and a second block which are spaced apart from each other, and a clearance opening is formed between the first block and the second block.

[0008] Further, the first block is fitted with the first anti-slip stopper, and / or the second block is fitted with the first anti-slip stopper.

[0009] Furthermore, a tool connection hole is provided on the surface of the first anti-slip stopper facing the opening of the second telescopic arm.

[0010] Further, the thickness of the first anti-slip block along the radial direction of the second telescopic arm is greater than the thickness of the first block along the radial direction of the second telescopic arm.

[0011] Further, the tool connection hole is arranged on a portion of the first anti-slip stopper that protrudes inwardly from the first block body.

[0012] Furthermore, the axis of the tool connecting hole is arranged at an inclination, and the axis of the tool connecting hole is arranged at an inclination gradually approaching the axis of the second telescopic arm along the contraction direction of the first telescopic arm.

[0013] Furthermore, the anti-detachment structure of the telescopic arm assembly also includes a connecting bolt, a through hole is provided on the side wall of the second telescopic arm, a threaded hole is provided on the first anti-detachment block, the stud of the connecting bolt passes through the through hole and cooperates with the threaded hole, and the nut of the connecting bolt is located outside the side wall of the second telescopic arm.

[0014] Further, the second anti-slip block is fixedly arranged on the first telescopic arm, and / or the stop block is fixedly arranged on the second telescopic arm.

[0015] According to another aspect of the present invention, a telescopic arm assembly is provided, comprising a second telescopic arm, a first telescopic arm telescopically arranged in an opening of the second telescopic arm, and an anti-slip structure arranged between the second telescopic arm and the first telescopic arm, wherein the anti-slip structure is the anti-slip structure of the above-mentioned telescopic arm assembly.

[0016] According to another aspect of the present invention, a crane is provided, comprising a telescopic arm assembly, wherein the telescopic arm assembly is the telescopic arm assembly described above.

[0017] According to another aspect of the present invention, a method for assembling an anti-detachment structure of a telescopic arm assembly is provided, which is used for assembling the anti-detachment structure of the telescopic arm assembly between the inner side of the second telescopic arm and the outer side of the first telescopic arm, the anti-detachment structure of the telescopic arm assembly is the anti-detachment structure of the telescopic arm assembly mentioned above, and the method for assembling the anti-detachment structure of the telescopic arm assembly comprises: inserting a tool into a tool connecting hole so that a first anti-detachment block is in a horizontal state; placing the first anti-detachment block between the inner side of the second telescopic arm and the outer side of the first telescopic arm, and extending the first anti-detachment block into the avoidance opening; rotating the first anti-detachment block by a tool so that the first anti-detachment block is switched from a horizontal state to a vertical state, and the first anti-detachment block is located on a side of the stop block away from an opening of the second telescopic arm; passing the stud of the connecting bolt through the second telescopic arm, so that the connecting bolt connects the first anti-detachment block to the second telescopic arm.

[0018] By applying the technical solution of the present invention, the first telescopic arm of the telescopic arm assembly can be telescopically arranged in the opening of the second telescopic arm of the telescopic arm assembly. The anti-slip structure of the telescopic arm assembly is arranged between the inner side of the second telescopic arm and the outer side of the first telescopic arm. The anti-slip structure of the telescopic arm assembly includes: a first anti-slip block, a second anti-slip block and a stop block. The first anti-slip block is detachably arranged on the second telescopic arm. The second anti-slip block is arranged on the first telescopic arm, and the first anti-slip block can cooperate with the second anti-slip block stop. In this way, the first anti-slip block can cooperate with the second anti-slip block stop to limit the telescopic range of the second telescopic arm in the first telescopic arm and prevent the second telescopic arm from falling off from the first telescopic arm. And the first anti-slip block is detachably arranged on the second telescopic arm, so that when the second telescopic arm needs to be taken out from the first telescopic arm, the first anti-slip block can be removed so that the first telescopic arm and the second anti-slip block can be taken out from the opening of the second telescopic arm, simplifying the operation of disassembling the telescopic arm assembly. When the telescopic arm assembly is installed, the first telescopic arm and the second anti-detachment block are placed into the opening of the second telescopic arm, and the first block is fixed on the second telescopic arm to prevent the second telescopic arm from falling off from the first telescopic arm, thereby simplifying the installation operation of the telescopic arm assembly. The stop block is arranged on the second telescopic arm, and the stop block is located on the side of the first anti-detachment block close to the opening of the second telescopic arm. The setting of the stop block can cooperate with the stop of the first anti-detachment block, so that the first anti-detachment block can be more stably and reliably fixed on the second telescopic arm, so that the stop cooperation between the first anti-detachment block and the second anti-detachment block is more reliable. The stop block is provided with an avoidance opening for the second anti-detachment block to pass through. When the first telescopic arm is taken out of the second telescopic arm, the first anti-detachment block is removed, and the second anti-detachment block can pass through the avoidance opening of the stop block, so that the second telescopic arm can be separated from the first telescopic arm, thereby making the operation of disassembling the telescopic arm assembly simple. When the telescopic arm assembly is installed, the second anti-slip block on the first telescopic arm can pass through the avoidance opening on the stop block to enter the second telescopic arm, making the installation operation of the telescopic arm assembly simple. Therefore, the technical solution of the present application effectively solves the problem of complicated installation and disassembly operations of the telescopic arm assembly in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 A perspective schematic diagram showing an embodiment of a telescopic arm assembly according to the present invention is shown;

[0021] Figure 2 Shows Figure 1 A schematic diagram of the three-dimensional structure of the opening of the second telescopic arm of the telescopic arm assembly;

[0022] Figure 3 Shows Figure 1 A schematic front view of the anti-slip structure of the telescopic arm assembly;

[0023] Figure 4 Shows Figure 1 A schematic diagram of the three-dimensional structure of a first anti-slip stopper of the anti-slip structure of the telescopic arm assembly;

[0024] Figure 5 Shows Figure 1 A schematic diagram of the three-dimensional structure of the first telescopic arm of the telescopic arm assembly;

[0025] Figure 6 A schematic flow chart of an assembly method of an anti-slip structure of a telescopic arm assembly according to the present invention is shown.

[0026] The above drawings include the following reference numerals:

[0027] 10. First telescopic arm;

[0028] 20. Second telescopic arm; 21. Opening;

[0029] 30. First anti-drop block; 31. Tool connection hole; 32. Threaded hole;

[0030] 40. Second anti-drop block;

[0031] 51. first block; 52. second block; 53. avoidance;

[0032] 60. Connecting bolts. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0035] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0036] like Figures 1 to 3 As shown, in the technical solution of this embodiment, the first telescopic arm 10 of the telescopic arm assembly is telescopically arranged in the opening 21 of the second telescopic arm 20 of the telescopic arm assembly. The anti-slip structure of the telescopic arm assembly is arranged between the inner side of the second telescopic arm 20 and the outer side of the first telescopic arm 10. The anti-slip structure of the telescopic arm assembly includes: a first anti-slip block 30, a second anti-slip block 40 and a stop block. The first anti-slip block 30 is detachably arranged on the second telescopic arm 20. The second anti-slip block 40 is arranged on the first telescopic arm 10, and the first anti-slip block 30 can stop and cooperate with the second anti-slip block 40. The stop block is arranged on the second telescopic arm 20, and the stop block is located on the side of the first anti-slip block 30 close to the opening 21 of the second telescopic arm 20. The stop block is provided with an avoidance opening 53 for the second anti-slip block 40 to pass through.

[0037] In this way, the first anti-detachment block 30 can cooperate with the second anti-detachment block 40 to limit the telescopic range of the second telescopic arm 20 in the first telescopic arm 10 and prevent the second telescopic arm 20 from falling off from the first telescopic arm 10. And the first anti-detachment block 30 is detachably arranged on the second telescopic arm 20, so that when the second telescopic arm 20 needs to be taken out from the first telescopic arm 10, the first anti-detachment block 30 can be removed so that the first telescopic arm 10 and the second anti-detachment block 40 can be taken out from the opening 21 of the second telescopic arm 20, simplifying the operation of disassembling the telescopic arm assembly. When the telescopic arm assembly is installed, the first telescopic arm 10 and the second anti-detachment block 40 are placed in the opening 21 of the second telescopic arm 20, and the first block is fixed on the second telescopic arm 20 to prevent the second telescopic arm 20 from falling off from the first telescopic arm 10, simplifying the installation operation of the telescopic arm assembly. The stop block is arranged on the second telescopic arm 20, and the stop block is located on the side of the first anti-detachment block 30 close to the opening 21 of the second telescopic arm 20. The setting of the stop block can cooperate with the first anti-detachment block 30 so that the first anti-detachment block 30 can be fixed on the second telescopic arm 20 more stably and reliably, so that the stop cooperation between the first anti-detachment block 30 and the second anti-detachment block 40 is more reliable. The stop block is provided with an escape opening 53 for the second anti-detachment block 40 to pass through. When the first telescopic arm 10 is taken out from the second telescopic arm 20, the first anti-detachment block 30 is removed, and the second anti-detachment block 40 can pass through the escape opening 53 of the stop block, so that the second telescopic arm 20 can be separated from the first telescopic arm 10, making the operation of disassembling the telescopic arm assembly simple. When the telescopic arm assembly is installed, the second anti-detachment block 40 on the first telescopic arm 10 can pass through the escape opening 53 on the stop block to enter the second telescopic arm 20, making the installation operation of the telescopic arm assembly simple. Therefore, the technical solution of this embodiment effectively solves the problem that the installation and disassembly of the telescopic arm assembly in the related art are more complicated.

[0038] In the present embodiment, the first anti-disengagement block 30 is detachably arranged on the second telescopic arm 20 through the connecting bolt 60. The stopper block can share the force of the connecting bolt 60, so that the first anti-disengagement block 30 can withstand a greater force, so that the fixation of the first anti-disengagement block 30 is more reliable. In addition, the setting of the stopper block can prevent the first telescopic arm 10 from being separated from the second telescopic arm 20 when the connecting bolt 60 is damaged. When the first anti-disengagement block 30 and the second anti-disengagement block 40 stop and cooperate, if the connecting bolt 60 is damaged, the setting of the stopper block can prevent the first anti-disengagement block 30 from falling off, so that the first anti-disengagement block 30 can abut between the stopper block and the second anti-disengagement block 40 to prevent the first telescopic arm 10 from falling off from the opening 21 of the second telescopic arm 20. If the connecting bolt 60 is damaged and the first anti-disengagement block 30 falls off, the stopper block can stop and cooperate with the second anti-disengagement block 40 to prevent the first telescopic arm 10 from falling off from the opening 21 of the second telescopic arm 20.

[0039] like Figures 1 to 3 As shown, the stop block includes a first block 51 and a second block 52 arranged at intervals, and a clearance opening 53 is formed between the first block 51 and the second block 52. The first block 51 and the second block 52 have simple structures and are easy to process. Moreover, the arrangement of the first block 51 and the second block 52 can reliably stop the first anti-slip block 30, so that the first anti-slip block 30 can be more stably and reliably fixed on the second telescopic arm 20. The clearance opening 53 is formed between the first block 51 and the second block 52, which is convenient for processing the avoidance hole and also convenient for the second anti-slip block 40 to pass through the clearance opening 53 formed between the first block 51 and the second block 52.

[0040] like Figures 1 to 3 As shown, the first block 51 is arranged in close contact with the first anti-slip block 30. The second block 52 is arranged in close contact with the first anti-slip block 30. In this way, the first block 51 and the second block 52 can share more force from the first anti-slip block 30, reducing the force on the first anti-slip block 30, so that the first anti-slip block 30 can be more reliably fixed on the second telescopic arm 20.

[0041] In other embodiments, the first block 51 is disposed in close contact with the first anti-slip block 30 . Alternatively, the second block 52 is disposed in close contact with the first anti-slip block 30 .

[0042] like Figures 1 to 4 As shown, a tool connection hole 31 is provided on the surface of the first anti-slip block 30 facing the opening 21 of the second telescopic arm 20. The setting of the tool connection hole 31 facilitates the operator to insert a tool into the tool connection hole 31 to connect with the first anti-slip block 30, so that the operator can install the first anti-slip block 30 on the side of the first anti-slip block 30 facing the opening 21 of the second telescopic arm 20, so as to put the first anti-slip block 30 between the inner side of the second telescopic arm 20 and the outer side of the first telescopic arm 10.

[0043] like Figures 1 to 4 As shown, the radial thickness of the first anti-detachment block 30 along the second telescopic arm 20 is greater than the radial thickness of the first block 51 along the second telescopic arm 20, so that the operator can install and disassemble the thicker first anti-detachment block 30, making it easier for the first anti-detachment block 30 to enter and exit between the inner side of the second telescopic arm 20 and the outer side of the first telescopic arm 10.

[0044] In this embodiment, the first anti-slip block 30 is detachably arranged on the second telescopic arm 20 by the connecting bolt 60. The first anti-slip block 30 is arranged to be thicker, which can increase the connection depth between the connecting bolt 60 and the first anti-slip block 30, so that the first anti-slip block 30 can be more reliably fixed on the second telescopic arm 20.

[0045] like Figures 1 to 4 As shown, the tool connection hole 31 is provided on the portion of the first anti-slip block 30 protruding inwardly from the first block body 51. In this way, after the operator inserts the tool into the tool connection hole 31, when the first anti-slip block 30 is put in and taken out between the inner side of the second telescopic arm 20 and the outer side of the first telescopic arm 10, the interference between the tool and the first anti-slip block 30 can be reduced, and the operation is convenient.

[0046] It should be noted that “the portion of the first anti-slip block 30 protruding inwardly from the first block body 51 ” means: the portion of the first anti-slip block 30 protruding from the first block body 51 along the direction from the outside of the second telescopic arm 20 to the axis of the second telescopic arm 20 .

[0047] In this embodiment, the tool connection hole 31 is arranged on the portion of the first anti-slip block 30 that protrudes inwardly from the second block 52. In this way, the operator can hold the tool and move the tool in the gap between the first block 51 and the first telescopic arm 10, so that the first anti-slip block 30 can bypass the first block 51 under the drive of the tool, so that the first anti-slip block 30 can be taken out from the side of the first block 51 away from the second block 52, which facilitates the operation of disassembling and taking out the first anti-slip block 30.

[0048] like Figures 1 to 4 As shown, the axis of the tool connection hole 31 is inclined, and the axis of the tool connection hole 31 is gradually inclined toward the axis of the second telescopic arm 20 along the contraction direction of the first telescopic arm 10. In this way, after the tool is inserted into the tool connection hole 31, the gripping end of the tool can be away from the axis of the second telescopic arm 20, which can provide a larger operating space for the operator and facilitate operation.

[0049] like Figures 1 to 4 As shown, the anti-slip structure of the telescopic arm assembly also includes a connecting bolt 60. A through hole is provided on the side wall of the second telescopic arm 20, and a threaded hole 32 is provided on the first anti-slip block 30. The stud of the connecting bolt 60 passes through the through hole and cooperates with the threaded hole 32, and the nut of the connecting bolt 60 is located outside the side wall of the second telescopic arm 20. The connecting bolt 60 has a simple structure and is easy to operate. In addition, the nut is arranged outside the side wall of the second telescopic arm 20, which is convenient for the operator to fix the first anti-slip block 30 on the second telescopic arm 20 by turning the nut, or to remove the first anti-slip block 30 from the second telescopic arm 20.

[0050] like Figures 1 to 5 As shown, the second anti-slip block 40 is fixedly arranged on the first telescopic arm 10, so that the second anti-slip block 40 is fixedly arranged on the first telescopic arm 10, so that the fixing of the second anti-slip block 40 is more reliable. The stop block is fixedly arranged on the second telescopic arm 20, so that the fixing of the stop block is more reliable.

[0051] In other embodiments, the second anti-slip stopper 40 is fixedly disposed on the first telescopic arm 10 . Alternatively, the stopper is fixedly disposed on the second telescopic arm 20 .

[0052] The present application also provides a telescopic arm assembly, which includes a second telescopic arm 20, a first telescopic arm 10 telescopically arranged in an opening 21 of the second telescopic arm 20, and an anti-slip structure arranged between the second telescopic arm 20 and the first telescopic arm 10, and the anti-slip structure is the anti-slip structure of the telescopic arm assembly described above. Since the anti-slip structure of the telescopic arm assembly described above can solve the problem of complicated installation and disassembly operations of the telescopic arm assembly in the related art, the telescopic arm assembly with the anti-slip structure can solve the same technical problem.

[0053] The present application also provides a crane, which includes a telescopic arm assembly. The telescopic arm assembly is the above-mentioned telescopic arm assembly. Since the above-mentioned telescopic arm assembly can solve the problem that the installation and disassembly operations of the telescopic arm assembly in the related art are relatively complicated, the telescopic arm assembly with the anti-slip structure can solve the same technical problem, and the crane with the telescopic arm assembly can solve the same technical problem.

[0054] In the present application, the anti-slip structure can limit the overlap amount of the first telescopic arm 10 and the second telescopic arm 20, thereby preventing the first telescopic arm 10 from slipping out of the second telescopic arm 20, so that the telescopic arm assembly can drive multiple telescopic arms to extend and retract through one telescopic cylinder, thereby saving costs and being suitable for situations where the internal space of the telescopic arm is limited.

[0055] The present application also provides an assembly method for the anti-slip structure of the telescopic arm assembly. Figure 6 As shown, the assembling method of the anti-detachment structure of the telescopic arm assembly is used to assemble the anti-detachment structure of the telescopic arm assembly between the inner side of the second telescopic arm 20 and the outer side of the first telescopic arm 10, the anti-detachment structure of the telescopic arm assembly is the anti-detachment structure of the telescopic arm assembly mentioned above, and the assembling method of the anti-detachment structure of the telescopic arm assembly includes: inserting a tool into the tool connecting hole 31, so that the first anti-detachment block 30 is in a horizontal state; placing the first anti-detachment block 30 between the inner side of the second telescopic arm 20 and the outer side of the first telescopic arm 10, and extending the first anti-detachment block 30 into the avoidance opening 53; rotating the first anti-detachment block 30 by the tool so that the first anti-detachment block 30 is switched from the horizontal state to the vertical state, and the first anti-detachment block 30 is located on the side of the stop block away from the opening 21 of the second telescopic arm 20; passing the stud of the connecting bolt 60 through the second telescopic arm 20, so that the connecting bolt 60 connects the first anti-detachment block 30 to the second telescopic arm 20.

[0056] In the present embodiment, the first anti-slip block 30 is a rectangular block. When the first anti-slip block 30 is mounted on the second telescopic arm 20, the rectangular block has a long side along the direction from the first block 51 to the second block 52, and a short side along the telescopic direction of the first telescopic arm 10. The first anti-slip block 30 is in a horizontal state, which means that the long side of the rectangular block is placed in a state parallel to the telescopic direction of the first telescopic arm 10. The first anti-slip block 30 is in a vertical state, which means that the long side of the rectangular block is placed in a state parallel to the direction from the first block 51 to the second block 52. The tool connection hole 31 is set in the middle of the long side of the rectangular block.

[0057] In other embodiments, the assembly method of the anti-detachment structure of the telescopic arm assembly includes: inserting a tool into a tool connecting hole 31; placing the first anti-detachment block 30 between the inner side of the second telescopic arm 20 and the outer side of the first telescopic arm 10, and placing the first anti-detachment block 30 on the side of the first block 51 away from the second block 52; moving the first anti-detachment block 30 along the contraction direction of the first telescopic arm 10, and moving the first anti-detachment block 30 along the direction of the first block 51 toward the second block 52; placing the first anti-detachment block 30 on the side of the first block 51 away from the opening 21 of the second telescopic arm 20; passing the stud of the connecting bolt 60 through the second telescopic arm 20, so that the connecting bolt 60 connects the first anti-detachment block 30 to the second telescopic arm 20.

[0058] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0059] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0060] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-drop structure of a telescopic arm assembly, wherein a first telescopic arm (10) of the telescopic arm assembly is telescopically arranged in an opening (21) of a second telescopic arm (20) of the telescopic arm assembly, characterized in that: The anti-slip structure of the telescopic arm assembly is arranged between the inner side of the second telescopic arm (20) and the outer side of the first telescopic arm (10), and the anti-slip structure of the telescopic arm assembly comprises: A first anti-slip stopper (30) is detachably arranged on the second telescopic arm (20); A second anti-slip stopper (40) is arranged on the first telescopic arm (10), and the first anti-slip stopper (30) can cooperate with the second anti-slip stopper (40) to stop the first telescopic arm (10); A stop block is arranged on the second telescopic arm (20), the stop block is located on a side of the first anti-slip stop block (30) close to the opening (21) of the second telescopic arm (20), and the stop block is provided with an escape opening (53) for the second anti-slip stop block (40) to pass through.

2. The anti-drop structure of the telescopic arm assembly according to claim 1, characterized in that: The stop block comprises a first block (51) and a second block (52) which are arranged at an interval, and the avoidance opening (53) is formed between the first block (51) and the second block (52).

3. The anti-drop structure of the telescopic arm assembly according to claim 2, characterized in that: The first block (51) is arranged in close contact with the first anti-slip stopper (30), and / or the second block (52) is arranged in close contact with the first anti-slip stopper (30).

4. The anti-slip structure of the telescopic arm assembly according to claim 2, characterized in that: A tool connection hole (31) is provided on the surface of the first anti-slip stopper (30) facing the opening (21) of the second telescopic arm (20).

5. The anti-slip structure of the telescopic arm assembly according to claim 4, characterized in that: The thickness of the first anti-slip block (30) along the radial direction of the second telescopic arm (20) is greater than the thickness of the first block (51) along the radial direction of the second telescopic arm (20).

6. The anti-slip structure of the telescopic arm assembly according to claim 5, characterized in that: The tool connection hole (31) is arranged on a portion of the first anti-slip stopper (30) that protrudes inwardly from the first block body (51).

7. The anti-drop structure of the telescopic arm assembly according to claim 4, characterized in that: The axis of the tool connection hole (31) is arranged tilted, and the axis of the tool connection hole (31) is arranged tilted gradually approaching the axis of the second telescopic arm (20) along the contraction direction of the first telescopic arm (10).

8. The anti-drop structure of the telescopic arm assembly according to claim 7, characterized in that: The anti-slip structure of the telescopic arm assembly also includes a connecting bolt (60), a through hole is provided on the side wall of the second telescopic arm (20), a threaded hole (32) is provided on the first anti-slip block (30), the stud of the connecting bolt (60) passes through the through hole and cooperates with the threaded hole (32), and the nut of the connecting bolt (60) is located outside the side wall of the second telescopic arm (20).

9. The anti-drop structure of the telescopic arm assembly according to claim 1, characterized in that: The second anti-slip block (40) is fixedly arranged on the first telescopic arm (10), and / or the stop block is fixedly arranged on the second telescopic arm (20).

10. A telescopic arm assembly, comprising a second telescopic arm (20), a first telescopic arm (10) telescopically arranged in an opening (21) of the second telescopic arm (20), and an anti-slip structure arranged between the second telescopic arm (20) and the first telescopic arm (10), characterized in that: The anti-slip structure is the anti-slip structure of the telescopic arm assembly according to any one of claims 1 to 9.

11. A crane comprising a telescopic arm assembly, characterized in that: The telescopic arm assembly is the telescopic arm assembly according to claim 10.

12. A method for assembling an anti-slip structure of a telescopic arm assembly, characterized in that: The anti-slip structure of the telescopic arm assembly according to claim 8 is assembled between the inner side of the second telescopic arm (20) and the outer side of the first telescopic arm (10), and the assembly method of the anti-slip structure of the telescopic arm assembly comprises: Inserting the tool into the tool connection hole (31) so that the first anti-slip stopper (30) is in a horizontal position; The first anti-slip block (30) is placed between the inner side of the second telescopic arm (20) and the outer side of the first telescopic arm (10), and the first anti-slip block (30) is extended into the avoidance opening (53); Rotating the first anti-slip block (30) by means of a tool so that the first anti-slip block (30) switches from the horizontal state to the vertical state, and the first anti-slip block (30) is located on a side of the stop block away from the opening (21) of the second telescopic arm (20); The stud of the connecting bolt (60) is passed through the second telescopic arm (20), so that the connecting bolt (60) connects the first anti-slip stopper (30) to the second telescopic arm (20).

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