Telescopic suspension arm and ton bag hanging bracket device

Abstract

The utility model provides a telescopic lifting arm and a ton bag lifting frame device. Wherein the telescopic suspension arm comprises a rack, a driving assembly, a first telescopic arm and a second telescopic arm, and the driving assembly is connected with the rack; the first telescopic arm comprises a main body part and a first transmission part, the first transmission part is a flexible part and rotatably arranged on the outer side of the main body part in a sleeving mode, one part of the first transmission part is fixedly arranged relative to the rack, and the driving assembly is in driving connection with the main body part and drives the main body part to move in the first direction; the second telescopic arm is in driving connection with the first transmission part and is driven by the first transmission part to move in the first direction. According to the utility model, the problem that the telescopic length of the suspension arm is limited in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to a hoisting device, in particular to a telescopic boom and a ton bag hanger device. Background Art

[0002] Most of the existing ton bag hangers are single-section ton bag hangers, and the telescopic length is limited by the length of the chain or telescopic section, and the height of the factory building is required to be high during installation. Therefore, ensuring the telescopic length of the hanger in a limited space, streamlining the equipment volume, and reducing the occupied space have become one of the important issues that need to be solved in today's production. Utility Model Content

[0003] The main purpose of the utility model is to provide a telescopic boom and a ton bag hanger device to solve the problem of limited telescopic length of the boom in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a telescopic boom is provided, including a frame, a driving assembly, a first telescopic arm, and a second telescopic arm, wherein the driving assembly is connected to the frame; the first telescopic arm includes a main body and a first transmission member, the first transmission member is a flexible member, and is rotatably mounted on the outer side of the main body, a part of the first transmission member is fixedly arranged relative to the frame, the driving assembly is drivingly connected to the main body, and drives the main body to move in a first direction; the second telescopic arm is drivingly connected to the first transmission member, and moves in the first direction driven by the first transmission member.

[0005] Furthermore, the telescopic boom also includes a fixing member connected to the frame, and a part of the first transmission member is fixedly connected to the fixing member, so that when the main body moves along the first direction, the first transmission member is deformed and rotates relative to the main body.

[0006] Furthermore, the fixing member and the second telescopic arm are located on two opposite sides of the main body.

[0007] Furthermore, the first transmission member has a chain structure, the fixing member has a toothed structure, and the toothed structure is meshed with the chain structure.

[0008] Furthermore, the first telescopic arm also includes a plurality of transmission gears, which are located at the end of the main body and rotatably connected to the main body, and the first transmission member is meshed and transmission-coordinated with the transmission gears.

[0009] Furthermore, the driving assembly includes a driving member and a first gear, the driving member is connected to the frame; the first gear is located at the output end of the driving member, the main body has a first rack, the first gear is meshed with the first rack, and the driving member drives the main body to move through the first gear and the first rack.

[0010] Further, the first transmission member has a chain structure, the second telescopic arm has a second rack, and the second rack meshes with the chain structure. When the chain structure rotates, the second telescopic arm is driven to move through the second rack.

[0011] Further, the first telescopic arm further includes a connecting portion, the connecting portion is connected to the main body portion, and the first telescopic arm is connected to an external component through the connecting portion.

[0012] Further, the telescopic boom further includes a bellows cover and a housing. The bellows cover is connected to the frame and covers at least part of the outside of the first telescopic arm; the housing is connected to the frame, and the housing and the bellows cover are located on opposite sides of the frame, and the housing covers at least part of the outside of the second telescopic arm.

[0013] According to another aspect of the present invention, a ton bag hanging device is provided, including the above-mentioned telescopic boom.

[0014] Applying the technical solution of the present invention, by setting the main body portion of the first telescopic arm to be drivingly connected to the driving component, and a part of the flexible first transmission member to be fixedly connected to the frame, on the one hand, the first telescopic arm can move relative to the frame along the first direction under the drive of the driving component, and the first telescopic arm drives the second telescopic arm to move synchronously along the first direction, so that the first telescopic arm and the second telescopic arm move synchronously along the first direction relative to the frame. On the other hand, when the first telescopic arm moves relative to the frame along the first direction under the drive of the driving component, since a part of the first transmission member is fixedly connected to the frame, a part of the first transmission member moves with the main body portion, and the other part remains fixedly connected to the frame, causing the first transmission member to deform, thereby rotating relative to the main body portion, and further causing the second telescopic arm connected to the first transmission member to move relative to the main body portion along the first direction. In this way, the first transmission member transmits the overall movement with the main body portion and the movement relative to the main body portion to the second telescopic arm, so that the first telescopic arm and the second telescopic arm can be synchronously telescoped, thereby increasing the telescopic length of the telescopic boom, while reducing the space occupied by the telescopic boom, improving the space utilization rate and the degree of automation, and reducing the requirements for the height, area, etc. of the factory building during the installation of the telescopic boom. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0016] Figure 1 An isometric view of the telescopic boom of the present invention is shown;

[0017] Figure 2 The front view of the telescopic boom is shown;

[0018] Figure 3 An axonometric view showing the internal structure of the telescopic boom is shown;

[0019] Figure 4 A front view showing the internal structure of the telescopic boom is shown;

[0020] Figure 5 A schematic structural view showing the telescopic boom when the hidden bellows cover and the outer shell are extended is shown;

[0021] Figure 6 A schematic structural view showing the telescopic boom when the hidden bellows cover and the outer shell are retracted is shown.

[0022] Among them, the above-mentioned drawings include the following reference numerals:

[0023] 10, frame; 20, drive assembly; 21, drive member; 22, first gear; 30, first telescopic arm; 31, main body part; 311, first rack; 32, first transmission member; 33, transmission gear; 34, connecting part; 40, second telescopic arm; 41, second rack; 50, fixing member; 60, bellows cover; 70, outer shell. Specific embodiments

[0024] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0025] It should be pointed out that unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0026] In the present invention, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are generally in the direction shown in the drawings, or in the vertical, perpendicular or gravitational direction of the component itself; similarly, for the convenience of understanding and description, "inner, outer" refer to the inner and outer of the contour of each component itself, but the above orientation terms do not limit the present invention.

[0027] In order to solve the problem that the telescopic length of the boom in the prior art is limited, the present invention provides a telescopic boom and a ton bag hanging device, wherein the ton bag hanging device includes the following telescopic boom.

[0028] Such as Figures 1 to 6A telescopic boom shown includes a frame 10, a driving assembly 20, a first telescopic arm 30, and a second telescopic arm 40. The driving assembly 20 is connected to the frame 10. The first telescopic arm 30 includes a main body portion 31 and a first transmission member 32. The first transmission member 32 is a flexible member and is rotatably sleeved outside the main body portion 31. A part of the first transmission member 32 is fixedly arranged relative to the frame 10. The driving assembly 20 is drivingly connected to the main body portion 31 and drives the main body portion 31 to move in a first direction. The second telescopic arm 40 is drivingly connected to the first transmission member 32 and moves in the first direction under the drive of the first transmission member 32.

[0029] In this embodiment, by setting the main body portion 31 of the first telescopic arm 30 to be drivingly connected to the driving assembly 20, and a part of the flexible first transmission member 32 to be fixedly connected to the frame 10, on the one hand, the first telescopic arm 30 can move relative to the frame 10 in the first direction under the drive of the driving assembly 20, and the first telescopic arm 30 drives the second telescopic arm 40 to move synchronously in the first direction. Thus, the first telescopic arm 30 and the second telescopic arm 40 move synchronously in the first direction relative to the frame 10. On the other hand, when the first telescopic arm 30 moves relative to the frame 10 in the first direction under the drive of the driving assembly 20, since a part of the first transmission member 32 is fixedly connected to the frame 10, a part of the first transmission member 32 moves with the main body portion 31, and the other part remains fixedly connected to the frame 10, causing the first transmission member 32 to deform, thereby rotating relative to the main body portion 31, and further causing the second telescopic arm 40 connected to the first transmission member 32 to move relative to the main body portion 31 in the first direction. In this way, the first transmission member 32 transmits the overall movement with the main body portion 31 and the movement relative to the main body portion 31 to the second telescopic arm 40, enabling the first telescopic arm 30 and the second telescopic arm 40 to synchronously expand and contract, thereby increasing the telescopic length of the telescopic boom, while also being able to reduce the space occupied by the telescopic boom, improving space utilization and automation level, and reducing the requirements for the height, area, etc. of the factory building during the installation of the telescopic boom.

[0030] It should be noted that in this embodiment, the first direction is taken as the lifting direction, that is Figure 1 the up and down direction for example. The telescopic boom of this embodiment is vertically placed, and both the first telescopic arm 30 and the second telescopic arm 40 are arranged in the vertical direction. The telescopic boom can telescopically grab heavy objects in the vertical direction. This segmented telescopic method reduces the overall length of the structure while ensuring the telescopic stroke. Of course, the telescopic boom can also be used for telescoping in other directions, as long as the telescopic directions of the first telescopic arm 30 and the second telescopic arm 40 are consistent with the telescopic direction of the telescopic boom. For example, the telescopic boom can also be horizontally placed, and the first telescopic arm 30 and the second telescopic arm 40 are arranged in the same direction as the telescopic boom, also in the horizontal direction. Then the telescopic boom can telescopically grab heavy objects in the horizontal direction.

[0031] In this embodiment, the telescopic boom further includes a fixing member 50. The fixing member 50 is connected to the frame 10, and a part of the first transmission member 32 is fixedly connected to the fixing member 50, so that when the main body portion 31 moves in the first direction, the first transmission member 32 deforms and rotates relative to the main body portion 31. Specifically, when the main body portion 31 drives the first transmission member 32 to move in the first direction, the part fixed to the fixing member 50 cannot move with the main body portion 31, so that a part of the first transmission member 32 remains connected to the fixing member 50, and a part deforms to maintain the cooperation relationship between the first transmission member 32 and the main body portion 31, thereby causing the first transmission member 32 to rotate relative to the main body portion 31. The fixing frame and the frame 10 can be fixed by bolts.

[0032] In this embodiment, when the first telescopic arm 30 and the second telescopic arm 40 can extend and retract in the same direction at the same time, they can reach the maximum telescopic length and the minimum occupied space. Therefore, the fixing member 50 and the second telescopic arm 40 are arranged on opposite sides of the main body portion 31. Specifically, when the driving assembly 20 drives the first telescopic arm 30 to extend downward, the fixing member 50 is arranged on the left side of the first transmission member 32, so that the first transmission member 32 rotates relative to the main body portion 31, and the part of the first transmission member 32 connected to the fixing member 50 moves upward relative to the main body portion 31. The second telescopic arm 40 is arranged on the right side of the first transmission member 32, and the first transmission member 32 on the right side moves downward relative to the main body portion 31, thereby driving the second telescopic arm 40 to extend downward relative to the main body portion 31, so as to realize the simultaneous downward extension of the first telescopic arm 30 and the second telescopic arm 40; similarly, when the driving assembly 20 drives the first telescopic arm 30 to retract upward, the setting of the fixing member 50 causes the first transmission member 32 to rotate relative to the main body portion 31, and the part of the first transmission member 32 connected to the fixing member 50 moves downward relative to the main body portion 31, so that the part of the first transmission member 32 drivingly connected to the second telescopic arm 40 moves upward, thereby driving the second telescopic arm 40 to move upward, so as to realize the simultaneous upward retraction of the first telescopic arm 30 and the second telescopic arm 40. Of course, the left and right positions of the fixing member 50 and the second telescopic arm 40 can be interchanged, and the movement directions of the part of the first transmission member 32 connected to the fixing member 50 and the part of the first driving member 21 connected to the second telescopic arm 40 are opposite, and the movement direction of the second telescopic arm 40 relative to the main body portion 31 is the same as the movement direction of the main body portion 31 relative to the frame 10. Or the fixing member 50 may not be provided, and the position on the first transmission member 32 that cooperates with the fixing member 50 is directly fixedly connected to the frame 10 by welding or the like.

[0033] In this embodiment, the first transmission member 32 has a chain structure, and the fixing member 50 has a toothed structure, and the toothed structure meshes with the chain structure. Specifically, the first transmission member 32 of this embodiment is arranged as an annular chain structure, so as to form a flexible member that can be deformed by using the characteristics of the chain structure. The fixing member 50 is arranged as a strip-shaped toothed structure, and the length direction is along the extending direction of the chain structure. The fixing member 50 is fixed on one side of the frame 10 facing the chain structure, and teeth are arranged on the side of the fixing member 50 facing the chain structure. In this way, the toothed structure meshes with the chain structure within its length range, so that the fixing member 50 and the first transmission member 32 are fixed at multiple points, thereby improving the reliability of the cooperation between the fixing member 50 and the first transmission member 32 and preventing the two from falling off. Of course, the first transmission member 32 can also adopt other structures such as a conveyor belt.

[0034] In this embodiment, the first telescopic arm 30 further includes a plurality of transmission gears 33. The transmission gears 33 are located at the ends of the main body portion 31 and are rotatably connected to the main body portion 31. The first transmission member 32 is in meshing transmission cooperation with the transmission gears 33. Specifically, based on the telescopic boom of this embodiment being vertically placed, the main body portion 31 is also vertically placed. Two transmission gears 33 are provided and symmetrically arranged at the upper and lower ends of the main body portion 31. The farther the distance between the transmission gears 33 at both ends, the more beneficial it is to increase the telescopic length of the telescopic boom, which can be specifically set according to actual conditions. When the first telescopic arm 30 moves up and down, the first transmission member 32 drives the transmission gears 33 to rotate relative to the main body portion 31 at the same time. The rotation directions of the first transmission member 32 and the transmission gears 33 are the same. Through the rotation direction of the transmission gears 33, the movement directions of a part of the chain structure arranged on the left side and another part of the chain structure arranged on the right side relative to the main body portion 31 are opposite, so as to realize the same-direction telescoping of the second telescopic arm 40 and the first telescopic arm 30. Of course, when the telescopic boom is horizontally placed, the transmission gears 33 are arranged at the ends of the main body portion 31 in the horizontal direction.

[0035] In this embodiment, the driving assembly 20 includes a driving member 21 and a first gear 22. The driving member 21 is connected to the frame 10. The first gear 22 is located at the output end of the driving member 21. The main body portion 31 has a first rack 311. The first rack 311 is strip-shaped and is vertically placed. The first gear 22 meshes with the first rack 311. The driving member 21 drives the main body portion 31 to move through the first gear 22 and the first rack 311. Specifically, the driving member 21 is fixed on the frame 10 and drives the first gear 22 to rotate. The first gear 22 drives the first rack 311 to move up and down. Thus, the first rack 311 can drive the main body portion 31 to move up and down, thereby realizing the telescoping of the first telescopic arm 30. The first rack 311 has a certain length in the vertical direction and can mesh with the first gear 22 within the length range. As the first gear 22 rotates, the first gear 22 meshes with different parts of the first rack 311 in the length direction. Thus, the first rack 311 drives the first telescopic arm 30 to lift relative to the first gear 22, thereby ensuring the telescopic length of the first telescopic arm 30. The position of the first rack 311 is not unique and can be adjusted according to the actual situation. In this embodiment, the first rack 311 and the fixing member 50 are arranged on the same side of the first transmission member 32, both on the left side of the first transmission member 32. Of course, the first rack 311 can also be vertically arranged on the right side of the first transmission member 32, or can also be vertically arranged at the middle position of the intermediate member, as long as it can realize the lifting of the main body portion 31 by the driving member 21. Optionally, the driving member 21 can be set as a motor, and the motor and the frame 10 can adopt a bolt fixing method.

[0036] In this embodiment, the second telescopic arm 40 has a second rack 41. The second rack 41 meshes with a chain structure. When the chain structure rotates, it drives the second telescopic arm 40 to move through the second rack 41. Specifically, the second rack 41 is similar to the setting of the fixing member 50, and is also set as strip-shaped and vertically placed, with the teeth facing left for convenient meshing with the chain structure. The difference is that the second rack 41 meshes with the right side of the chain structure, and the fixing member 50 meshes with the left side of the chain structure. By using the fact that the movement directions of the left and right parts of the chain structure are opposite, the movement of the left chain structure relative to the main body portion 31 is opposite to the movement direction of the main body portion 31 relative to the frame 10. Thus, the movement of the right chain structure relative to the main body portion 31 is the same as the movement direction of the main body portion 31 relative to the frame 10, thereby realizing the same-direction telescoping of the first telescopic arm 30 and the second telescopic arm 40. A connecting plate is arranged at the end of the extending direction of the second telescopic arm 40, that is, the lower end of the second telescopic arm 40 in this embodiment. The lower surface of the connecting plate is connected to different types of grasping devices, etc. for grasping heavy objects. Of course, according to actual needs, the first telescopic arm 30 and the second telescopic arm 40 can also be set to extend upward, then the connecting plate is arranged at the upper end of the second telescopic arm 40.

[0037] Such asFigure 3 , Figure 4 As shown in Figure 4 , in this embodiment, the first telescopic arm 30 further includes a connecting portion 34. The connecting portion 34 is connected to the main body portion 31, and the first telescopic arm 30 is connected to an external component through the connecting portion 34. Specifically, the connecting portion 34 is provided at the end of the main body portion 31, and in this embodiment, it is provided at the upper end of the main body portion 31. The connecting portion 34 includes a top plate and side plates. The top plate is placed horizontally for connecting to an external component, and the side plates are connected to the top plate, placed vertically and connected to the transmission gear 33 provided at the upper end of the main body portion 31.

[0038] As Figure 1 , Figure 2 As shown in Figure 1 and Figure 2 , in this embodiment, the telescopic boom further includes a bellows 60 and a housing 70. The bellows 60 is connected to the frame 10 and covers at least part of the outside of the first telescopic arm 30; the housing 70 is connected to the frame 10, and the housing 70 and the bellows 60 are located on opposite sides of the frame 10, and the housing 70 covers at least part of the outside of the second telescopic arm 40. Specifically, the first telescopic arm 30 and the second telescopic arm 40 pass through the inside of the bellows 60, the frame 10, and the housing 70. In this embodiment, the bellows 60, the frame 10, and the housing 70 are arranged in sequence in the vertical direction. The upper end of the bellows 60 is connected to the top plate of the connecting portion 34, and the lower end is connected to the upper end of the frame 10, thus playing a protective role for the first telescopic arm 30 and the second telescopic arm 40, and being able to automatically adjust its own length according to the telescoping of the first telescopic arm 30 and the second telescopic arm 40 to ensure the protective effect while not affecting the telescoping movement of the first telescopic arm 30 and the second telescopic arm 40. The housing 70 is located at the outermost part of the lower end of the telescopic boom, provided below the frame 10, playing a protective role to prevent the internal first telescopic arm 30, second telescopic arm 40, fixing member 50, first gear 22, etc. from being exposed to dust or potential safety problems caused by improper operation.

[0039] The main process steps of the telescopic boom in this embodiment are as follows:

[0040] 1. The initial state of the telescopic boom is as Figure 6 shown. The lowermost end of the first rack 311 meshes with the first gear 22, and both the first telescopic arm 30 and the second telescopic arm 40 are at the highest positions;

[0041] 2. Extension process: Activate the driving member 21, and the first gear 22 drives the first rack 311 to move; the first rack 311 moves vertically downward relative to the driving member 21; the fixing member 50 is fixed to the frame 10, and the first telescopic arm 30 moves vertically downward relative to the frame 10; the fixing member 50 meshes with the chain structure. Therefore, when the entire chain structure moves vertically downward relative to the fixing member 50, the fixing member 50 drives the chain structure to rotate; due to the rotation of the chain structure, there is relative movement between the chain structure and the main body portion 31, and the portion of the chain structure meshing with the second rack 41 moves downward relative to the main body portion 31, driving the second rack 41 to move downward. Therefore, the second telescopic arm 40 moves vertically downward; as Figure 5 shown, the first telescopic arm 30 and the second telescopic arm 40 extend, and the connecting plate at the lower end of the second telescopic arm 40 completes a downward elongation process;

[0042] 3. Retraction process: Activate the driving member 21, and the first gear 22 rotates in the reverse direction, driving the first rack 311 to move; the first rack 311 moves vertically upward relative to the driving member 21; the first telescopic arm 30 is driven by the first rack 311 to move vertically upward relative to the frame 10; when the entire chain structure moves vertically downward relative to the fixing member 50 along with the main body portion 31, the fixing member 50 drives the chain structure to rotate; due to the rotation of the chain structure, there is relative movement between the chain structure and the main body portion 31, and the portion of the chain structure meshing with the second rack 41 moves upward relative to the main body portion 31, driving the second rack 41 to move upward. Therefore, the second telescopic arm 40 moves vertically upward; as Figure 6 shown, the first telescopic arm 30 and the second telescopic arm 40 retract, and the connecting plate at the lower end of the second telescopic arm 40 completes an upward contraction process.

[0043] It should be noted that the multiple in the above embodiments refers to at least two.

[0044] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0045] 1. Solve the problem that the telescopic length of the boom in the prior art is limited;

[0046] 2. The first transmission member transmits the movement of the whole along with the main body portion and the movement relative to the main body portion to the second telescopic arm, so that the first telescopic arm and the second telescopic arm can synchronously extend and retract, thereby increasing the telescopic length of the telescopic boom;

[0047] 3. Reduce the space occupied by the telescopic boom, improve the space utilization rate and the degree of automation, and reduce the requirements for the height, area, etc. of the factory building during the installation of the telescopic boom.

[0048] Obviously, the embodiments described above are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0049] 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 "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0050] It should be noted that the terms "first", "second", etc. in the description and claims of the present application and the above drawings are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0051] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A telescopic boom, characterized in that, Comprising: A frame (10); A driving assembly (20), the driving assembly (20) being connected to the frame (10); A first telescopic arm (30), the first telescopic arm (30) including a main body portion (31) and a first transmission member (32), the first transmission member (32) being a flexible member and rotatably sleeved outside the main body portion (31), a part of the first transmission member (32) being fixedly arranged relative to the frame (10), the driving assembly (20) being drivingly connected to the main body portion (31) and driving the main body portion (31) to move in a first direction; A second telescopic arm (40), the second telescopic arm (40) being drivingly connected to the first transmission member (32) and moving in the first direction under the drive of the first transmission member (32).

2. The telescopic boom according to claim 1, characterized in that, The telescopic boom further includes a fixing member (50), the fixing member (50) being connected to the frame (10), a part of the first transmission member (32) being fixedly connected to the fixing member (50), so that when the main body portion (31) moves in the first direction, the first transmission member (32) deforms and rotates relative to the main body portion (31).

3. The telescopic boom according to claim 2, characterized in that, The fixing member (50) and the second telescopic arm (40) are located on opposite sides of the main body portion (31).

4. The telescopic boom according to claim 2, wherein, The first transmission member (32) has a chain structure, the fixing member (50) has a toothed structure, and the toothed structure meshes with the chain structure.

5. The telescopic boom according to claim 1, characterized in that, The first telescopic arm (30) further includes a plurality of transmission gears (33), the transmission gears (33) being located at the ends of the main body portion (31) and rotatably connected to the main body portion (31), the first transmission member (32) being in meshing transmission cooperation with the transmission gears (33).

6. The telescopic boom according to claim 1, wherein, The driving assembly (20) includes: A driving member (21), the driving member (21) being connected to the frame (10); A first gear (22), the first gear (22) being located at the output end of the driving member (21), the main body portion (31) having a first rack (311), the first gear (22) meshing with the first rack (311), and the driving member (21) driving the main body portion (31) to move through the first gear (22) and the first rack (311).

7. The telescopic boom according to claim 1, wherein The first transmission member (32) has a chain structure, the second telescopic arm (40) has a second rack (41), the second rack (41) meshing with the chain structure, and the chain structure driving the second telescopic arm (40) to move through the second rack (41) when rotating.

8. The telescopic boom according to claim 1, characterized in that, The first telescopic arm (30) further includes a connecting portion (34), the connecting portion (34) being connected to the main body portion (31), and the first telescopic arm (30) being connected to an external component through the connecting portion (34).

9. The telescopic boom according to claim 1, wherein, The telescopic boom further includes: A bellows cover (60), the bellows cover (60) being connected to the frame (10) and covering at least part of the outside of the first telescopic arm (30); A housing (70), the housing (70) is connected to the frame (10), and the housing (70) and the bellows cover (60) are located on opposite sides of the frame (10), and the housing (70) covers at least part of the outside of the second telescopic arm (40).

10. A bulk bag hanging device, characterized in that, Comprising the telescopic jib according to any one of claims 1 to 9.

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