Telescopic boom devices and construction machinery

Abstract

This application discloses a telescopic boom device and engineering machinery. The telescopic boom device includes: a fixed boom; a first telescopic boom; and a first telescopic drive component, including a relatively movable first telescopic rod portion and a first cylinder portion. The first cylinder portion is located inside and connected to the first telescopic boom and partially extends into the inside of a second telescopic boom. A first end of the first telescopic rod portion extends into the first cylinder portion, and a second end of the first telescopic rod portion is connected to the fixed boom and is vertically movable. This telescopic boom device can prevent the telescopic drive component from failing due to boom bending, thus improving its reliability.

Description

Technical Field

[0001] This application belongs to the field of engineering machinery technology, specifically relating to a telescopic boom device and engineering machinery. Background Technology

[0002] In the field of construction machinery, multi-stage telescopic boom technology has a wide range of applications, adapting to various engineering construction needs and thus playing a vital role in construction machinery. Existing telescopic boom systems in construction machinery typically incorporate built-in telescopic drive components (such as telescopic hydraulic cylinders or telescopic electric cylinders) as power sources. These directly drive the individual telescopic arms of the boom or use wire ropes to pull the arms, achieving the overall extension and retraction of the boom system. The ends of the telescopic drive components are generally fully hinged and fixed. The drive components and the boom undergo synchronous elastic bending deformation. If the bending deformation of the drive components is large (or the bending moment is large), it can easily lead to failure, affecting the reliability of the telescopic boom system and the construction machinery. Utility Model Content

[0003] The purpose of this application is to provide a telescopic boom device and engineering machinery, which have the advantages of simple structure, avoiding failure of telescopic drive components due to boom bending, and improving the reliability of telescopic boom device and engineering machinery.

[0004] To achieve the above objectives, the first aspect of this application provides a telescopic boom device, which includes:

[0005] Fixed arm;

[0006] The first telescopic arm extends partially into the interior of the fixed arm and can move laterally;

[0007] The first telescopic drive includes a first telescopic rod portion and a first cylinder portion that are movable relative to each other. The first cylinder portion is located inside the first telescopic arm and is connected to the first telescopic arm and extends partially into the interior of the second telescopic arm. The first end of the first telescopic rod portion extends into the first cylinder portion, and the second end of the first telescopic rod portion is connected to the fixed arm and can move vertically.

[0008] In embodiments of this application, the telescopic boom device further includes:

[0009] A first connecting component is disposed on a fixed arm and has two first connecting slots that are distributed opposite to each other, the first connecting slots being distributed vertically;

[0010] The first connecting post passes through the end of the first telescopic rod that is away from the first cylinder. The two ends of the first connecting post are movably disposed in the two first connecting grooves.

[0011] In embodiments of this application, the telescopic boom device further includes:

[0012] A first stop assembly is disposed on the first connecting assembly and is used to limit the movement distance of the first connecting post in the first connecting groove.

[0013] In the embodiments of this application, the first connecting groove is U-shaped.

[0014] In the embodiments of this application, the first connecting column is provided with a first cutting part at both axial ends, and the first cutting part and the vertical sidewall of the first connecting groove form a surface contact.

[0015] In embodiments of this application, the first connecting component is detachably mounted on the fixed arm.

[0016] In embodiments of this application, the telescopic boom device further includes:

[0017] The first pad assembly is disposed between the first telescopic arm and the fixed arm and is connected to the first telescopic arm or the fixed arm.

[0018] In embodiments of this application, the telescopic boom device further includes:

[0019] The second telescopic arm extends partially into the interior of the first telescopic arm and can move laterally;

[0020] The second telescopic drive member is located above the first telescopic drive member and includes a second telescopic rod part and a second cylinder part that can move relative to each other. The second cylinder part is disposed inside the second telescopic arm and its two ends are respectively connected to the first telescopic arm and the second telescopic arm. The first end of the second telescopic rod part extends into the second cylinder part, and the second end of the second telescopic rod part is connected to the first telescopic arm and can move vertically.

[0021] The cylinder connector is vertically movable and mounted on the second telescopic arm and connected to the second cylinder section.

[0022] In embodiments of this application, the telescopic boom device further includes a slider disposed at the bottom of the first cylinder section and movable laterally within the second telescopic boom.

[0023] A second aspect of this application provides an engineering machine that includes the aforementioned telescopic boom device.

[0024] As can be seen from the above technical solution, the telescopic boom device includes a fixed boom, a first telescopic boom, and a first telescopic drive component. The first telescopic boom partially extends into the interior of the fixed boom and can move laterally; the second telescopic boom partially extends into the interior of the first telescopic boom and can move laterally; the first telescopic drive component includes a first telescopic rod portion and a first cylinder portion that can move relative to each other. The first cylinder portion is located inside the first telescopic boom and connected to it. The first end of the first telescopic rod portion extends into the first cylinder portion, and the second end of the first telescopic rod portion is connected to the fixed boom and can move vertically. This telescopic boom device has a simple structure. When the first telescopic boom is in its extended state and the end furthest from the frame has a certain load, the second end of the first telescopic drive component can adaptively move vertically, ensuring that the first telescopic drive component always maintains straightness. This ensures that the first telescopic drive component is not affected by the overall bending of the fixed boom and the first telescopic boom, guaranteeing the working stability of the first telescopic drive component and the reliability of the telescopic boom device.

[0025] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0026] 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:

[0027] Figure 1 This is a first-view structural schematic diagram of the telescopic boom device in the embodiments of this application;

[0028] Figure 2 This is a structural schematic diagram of the telescopic boom device from a second perspective in the embodiments of this application;

[0029] Figure 3 This is a first cross-sectional view of the telescopic boom device in the embodiment of this application (extended state);

[0030] Figure 4 This is a second cross-sectional schematic diagram of the telescopic boom device in the embodiment of this application (partially extended state).

[0031] Figure 5 This is a third cross-sectional view (retracted state) of the telescopic boom device in the embodiments of this application.

[0032] Explanation of reference numerals in the attached figures

[0033] 1-Fixed arm; 2-First telescopic arm; 3-Second telescopic arm; 4-First telescopic drive component; 401-First telescopic rod portion; 402-First cylinder portion; 5-Second telescopic drive component; 501-Second telescopic rod portion; 502-Second cylinder portion; 6-First connecting assembly; 601-First connecting groove; 7-First connecting post; 701-First cutting part; 8-Second connecting assembly; 801-Second connecting groove; 9-Second connecting post; 901-Second cutting part; 10-Cylinder connecting component; 11-Slider; 12-First pad assembly; 13-Second pad assembly; 14-First connecting seat assembly; 1401-First connecting seat; 1402-Second connecting seat; 1403-First connecting pin; 15-Second connecting seat assembly; 1501-Third connecting seat; 1502-Fourth connecting seat; 1503-Second connecting pin. Detailed Implementation

[0034] 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.

[0035] Embodiments of this application provide a telescopic boom device, such as Figures 1-5 As shown, the telescopic boom device includes:

[0036] Fixed arm 1;

[0037] The first telescopic arm 2 extends partially into the interior of the fixed arm 1 and is movable laterally;

[0038] The first telescopic drive member 4 includes a first telescopic rod portion 401 and a first cylinder portion 402 that are movable relative to each other. The first cylinder portion 402 is located inside the first telescopic arm 2 and is connected to the first telescopic arm 2 and extends partially into the interior of the second telescopic arm 3. The first end of the first telescopic rod portion 401 extends into the first cylinder portion 402, and the second end of the first telescopic rod portion 401 is connected to the fixed arm 1 and can move vertically.

[0039] Specifically, the telescopic boom device in this embodiment is suitable for construction machinery. The fixed boom 1 is connected to the frame of the construction machinery. When the first telescopic boom 2 moves away from the frame, the telescopic boom device can be extended as a whole. Conversely, when the first telescopic boom 2 moves closer to the frame, the telescopic boom device can be shortened as a whole. In this embodiment, the first telescopic drive component 4 can be a telescopic electric cylinder. The first cylinder part 402 is sleeved on the outside of the first telescopic rod part 401 and can move along the axial direction (i.e., laterally) of the first telescopic rod part 401, thereby driving the first telescopic boom 2 to move laterally.

[0040] When the first telescopic boom 2 is in an extended state and has a certain load at the end away from the frame, the fixed boom 1 and the first telescopic boom 2 as a whole will bend downward. However, the second end of the first telescopic drive component 4 in the telescopic boom device can adaptably move vertically so that the first telescopic drive component 4 always maintains straightness. This ensures that the first telescopic drive component 4 will not be affected by the bending of the fixed boom 1 and the first telescopic boom 2 as a whole, thus guaranteeing the working stability of the first telescopic drive component 4 and the reliability of the telescopic boom device.

[0041] In one embodiment of this application, such as Figure 1 As shown, the telescopic boom device also includes:

[0042] The first connecting component 6 is disposed on the fixed arm 1 and has two first connecting grooves 601 that are distributed opposite to each other, the first connecting grooves 601 being distributed vertically;

[0043] The first connecting post 7 passes through the end of the first telescopic rod 401 away from the first cylinder 402, and the two ends of the first connecting post 7 are respectively movably arranged in the two first connecting grooves 601.

[0044] Specifically, the first connecting assembly 6 includes a first connector and a second connector. The first connector is disposed on the first vertical sidewall of the fixed arm 1 and forms a first connecting groove 601 distributed vertically. The first connecting post 7 is distributed longitudinally, with one end of the first connecting post 7 extending into the first connecting groove 601 near the first vertical sidewall, and the other end of the first connecting post 7 passing through the end of the first telescopic rod portion 401 away from the first cylinder portion 402 and extending into the first connecting groove 601 near the second vertical sidewall. This arrangement allows the first connecting post 7 to move vertically adaptively within the two first connecting grooves 601 under the drive of the first telescopic rod portion 401. This ensures that the first telescopic drive member 4 maintains straightness even when the fixed arm 1 and the first telescopic arm 2 bend as a whole, preventing failure of the first telescopic drive member 4 when the fixed arm 1 and the first telescopic arm 2 bend as a whole.

[0045] In one embodiment of this application, the telescopic boom device further includes:

[0046] The first stop assembly is disposed on the first connecting assembly 6 and is used to limit the movement distance of the first connecting post 7 in the first connecting groove 601.

[0047] Specifically, in this embodiment, the openings of the first connecting grooves 601 all face upwards, and the first stop assembly includes two first stop rods (not shown in the figure). The two first stop rods are respectively inserted into the opening positions of the two first connecting grooves 601 (the first stop rods pass through the two vertical side walls of the first connecting grooves 601) to prevent the two ends of the first connecting column 7 from sliding out of the two first connecting grooves 601. The above arrangement further improves the reliability of the telescopic boom device.

[0048] In one embodiment of this application, the first connecting groove 601 is U-shaped. In this embodiment, the first connector and the second connector are integrally formed. The U-shaped first connecting groove 601 has the advantages of simple structure, easy manufacturing, and reduced number of parts in the telescopic boom device.

[0049] In another embodiment of this application, the bottom wall of the first connecting groove 601 can also be replaced by a first connecting rod connecting the two side walls of the first connecting groove 601. In this case, the first connecting member and the second connecting member are not integrally formed.

[0050] In one embodiment of this application, the first connecting column 7 is provided with a first cutting portion 701 at both axial ends, and the first cutting portion 701 and the vertical sidewall of the first connecting groove 601 form a surface contact.

[0051] Specifically, two first cutting portions 701 are formed at each of the axial ends of the first connecting post 7 (i.e., a total of four first cutting portions 701 are formed on the first connecting post 7), and the two first cutting portions 701 located at the same axial end are distributed relative to each other. Further, as... Figure 1 As shown, in this embodiment, the first cutting part 701 has a cutting plane, and the cutting plane of the first cutting part 701 and the vertical sidewall of the first connecting groove 601 form a surface contact. The above arrangement makes the forces between the two ends of the first connecting post 7 and the first connecting member and the second connecting member more uniform, which is beneficial to extending the service life of the first connecting assembly 6 and the first connecting post 7.

[0052] In one embodiment of this application, the first connecting component 6 is detachably mounted on the fixed arm 1.

[0053] Specifically, the first connecting member is set on the first and second vertical sidewalls of the fixed arm 1 by two sets of first bolt assemblies. The above arrangement can not only ensure the connection stability of the first and second connecting members, but also facilitate the installation, disassembly or replacement of the first and second connecting members according to actual needs, which is conducive to further extending the service life of the telescopic boom device.

[0054] In one embodiment of this application, the telescopic boom device further includes:

[0055] The first pad assembly 12 is disposed between the first telescopic arm 2 and the fixed arm 1 and is connected to the first telescopic arm 2 or the fixed arm 1.

[0056] Specifically, the first pad assembly 12 includes a first pad unit and a second pad unit. The first pad unit is located at the end of the first telescopic arm 2 near the frame and includes a first pad and a second pad located above and below the first telescopic arm 2, respectively. The second pad unit is located at the end of the first telescopic arm 2 away from the frame and includes a third pad and a fourth pad located above and below the first telescopic arm 2, respectively. The above arrangement can prevent the first telescopic arm 2 and the fixed arm 1 from directly contacting and rubbing against each other when the first telescopic arm 2 moves laterally or bends, thus protecting the first telescopic arm 2 and the fixed arm 1.

[0057] In one embodiment of this application, the second telescopic drive member 5 is located above the first telescopic drive member 4, such as... Figures 3-5 As shown, the telescopic boom device also includes:

[0058] The second telescopic arm 3 extends partially into the interior of the first telescopic arm 2 and can move laterally;

[0059] The second telescopic drive member 5 is located above the first telescopic drive member 4 and includes a second telescopic rod portion 501 and a second cylinder portion 502 that can move relative to each other. The second cylinder portion 502 is disposed inside the second telescopic arm 3 and its two ends are respectively connected to the first telescopic arm 2 and the second telescopic arm 3. The first end of the second telescopic rod portion 501 extends into the second cylinder portion 502, and the second end of the second telescopic rod portion 501 is connected to the first telescopic arm 2 and can move vertically.

[0060] The cylinder connector 10 is vertically movable and mounted on the second telescopic arm 3 and connected to the second cylinder part 502.

[0061] Specifically, when the second telescopic arm 3 moves away from the frame, the entire telescopic arm device can be extended; conversely, when the second telescopic arm 3 moves closer to the frame, the entire telescopic arm device can be shortened. In this embodiment, the second telescopic drive component 5 can be a telescopic electric cylinder. The second cylinder barrel 502 is sleeved on the outside of the second telescopic rod 501 and can move along the axial direction (i.e., laterally) of the second telescopic rod 501, thereby driving the second telescopic arm 3 to move laterally.

[0062] When the second telescopic boom 3 is in an extended state and has a certain load at the end away from the frame, the fixed boom 1, the first telescopic boom 2, and the second telescopic boom 3 as a whole will also bend downward. However, the second ends of the first telescopic drive component 4 and the second telescopic drive component 5 in the telescopic boom device can adaptably move vertically so that the first telescopic drive component 4 and the second telescopic drive component 5 always maintain straightness. This ensures that the first telescopic drive component 4 and the second telescopic drive component 5 are not affected by the overall bending of the fixed boom 1, the first telescopic boom 2, and the second telescopic boom 3, thus guaranteeing the working stability of the first telescopic drive component 4 and the second telescopic drive component 5 and the reliability of the telescopic boom device.

[0063] The telescopic boom device in this embodiment also includes a first connecting seat assembly 14 disposed at one end of the second cylinder section 502 near the frame. The first connecting seat assembly 14 includes a first connecting seat 1401, a second connecting seat 1402, and a first connecting pin 1403. The first connecting seat 1401 is connected to the top of the second cylinder section 502 near the frame. The second connecting seat 1402 is disposed inside the first telescopic boom 2 and connected to the top wall of the first telescopic boom 2. The first connecting seat 1401 and the second connecting seat 1402 are rotatably connected by the first connecting pin 1403. The above arrangement, together with the cylinder connecting member 10, enables the second telescopic boom 3 to deflect relative to the first telescopic boom 2, so that the second telescopic boom 3 can make adaptive movements according to the actual force conditions. Furthermore, in this embodiment, a perforation is formed on the top wall of the second telescopic arm 3. The cylinder connecting member 10 (such as a bolt) includes a stop portion (such as the head of a bolt) and a connecting portion (such as the bolt shank). The stop portion is located above the top wall of the second telescopic arm 3. One end of the connecting portion is connected to the stop portion, and the other end of the connecting portion passes downward through the perforation and connects to the second cylinder portion 502. The diameter of the perforation is greater than the width of the connecting portion (i.e., the outer diameter of the bolt shank) and smaller than the width of the stop portion (i.e., the outer diameter of the bolt head), so that the cylinder connecting member 10 can move up and down in the perforation while ensuring the connection stability of the second cylinder portion 502 and the second telescopic arm 3. When the second telescopic arm 3 bends, the cylinder connecting member 10 will move upward relative to the second telescopic arm 3, and the original gap between the second cylinder portion 502 and the second telescopic arm 3 will be eliminated. The bending force of the second telescopic arm 3 will not be transmitted to the second telescopic rod portion 501, further ensuring that the second telescopic drive member 5 will not be subjected to bending force during operation.

[0064] Furthermore, the telescopic boom device also includes:

[0065] The second connecting component 8 is disposed on the first telescopic arm 2 and has two second connecting slots 801 that are distributed opposite to each other, the second connecting slots 801 being distributed vertically;

[0066] The second connecting post 9 passes through the end of the second telescopic rod portion 501 away from the second cylinder portion 502, and the two ends of the second connecting post 9 are respectively movably disposed in the two second connecting grooves 801.

[0067] Specifically, the second connecting assembly 8 includes a third connecting member and a fourth connecting member. The third connecting member is disposed on the third vertical sidewall of the first telescopic arm 2 and forms a second connecting groove 801 distributed vertically. The fourth connecting member is disposed on the fourth vertical sidewall of the first telescopic arm 2 and is distributed opposite to the third connecting member. Another second connecting groove 801 distributed vertically is formed on the fourth connecting member. The second connecting post 9 is distributed longitudinally. One end of the second connecting post 9 extends into the second connecting groove 801 near the third vertical sidewall, and the other end of the second connecting post 9 passes through the end of the second telescopic rod portion 501 away from the second cylinder portion 502 and extends into the second connecting groove 801 near the fourth vertical sidewall. The above configuration allows the second connecting column 9 to move vertically adaptively in the two second connecting slots 801 under the drive of the second telescopic rod 501. This enables the first telescopic drive member 4 and the second telescopic drive member 5 to maintain straightness even when the fixed arm 1, the first telescopic arm 2, and the second telescopic arm 3 are bent as a whole, thus preventing the first telescopic drive member 4 and the second telescopic drive member 5 from failing when the fixed arm 1, the first telescopic arm 2, and the second telescopic arm 3 are bent as a whole.

[0068] Furthermore, the telescopic boom device also includes:

[0069] The second stop assembly is disposed on the second connecting assembly 8 and is used to limit the movement distance of the second connecting post 9 in the second connecting groove 801.

[0070] Specifically, in this embodiment, the openings of the second connecting grooves 801 all face upwards, and the second stop assembly includes two second stop rods (not shown in the figure). The two second stop rods are respectively set at the opening positions of the two second connecting grooves 801 (the second stop rods pass through the two vertical side walls of the second connecting grooves 801) to prevent the two ends of the second connecting column 9 from sliding out of the two second connecting grooves 801. The above arrangement further improves the reliability of the telescopic boom device.

[0071] Furthermore, the second connecting groove 801 is U-shaped. In this embodiment, the third and fourth connecting parts are integrally formed. The U-shaped second connecting groove 801 has the advantages of simple structure, easy manufacturing, and further reduction of the number of parts of the telescopic boom device.

[0072] Furthermore, the bottom wall of the second connecting groove 801 can also be replaced by a second connecting rod that connects the two side walls of the second connecting groove 801. In this case, the third connecting member and the fourth connecting member are not integrally formed.

[0073] Furthermore, the second connecting column 9 is provided with a second cutting part 901 at both axial ends, and the second cutting part 901 and the vertical sidewall of the second connecting groove 801 form a surface contact.

[0074] Specifically, two second cutting portions 901 are formed at each of the axial ends of the second connecting post 9 (i.e., a total of four second cutting portions 901 are formed on the second connecting post 9), and the two second cutting portions 901 located at the same axial end are distributed relative to each other. Further, as... Figure 1 As shown, in this embodiment, a cutting plane is formed on the second cutting part 901, and a surface contact is formed between the cutting plane of the second cutting part 901 and the vertical sidewall of the second connecting groove 801. The above arrangement makes the force between the two ends of the second connecting post 9 and the third connecting member and the fourth connecting member more uniform, which is beneficial to extending the service life of the second connecting assembly 8 and the second connecting post 9.

[0075] Furthermore, the second connecting component 8 is detachably mounted on the first telescopic arm 2.

[0076] Specifically, the third and fourth connecting parts are respectively set on the third and fourth vertical side walls of the first telescopic boom 2 by two sets of second bolt assemblies. The above arrangement can not only ensure the connection stability of the third and fourth connecting parts, but also facilitate the installation, disassembly or replacement of the third and fourth connecting parts according to actual needs, which is conducive to further extending the service life of the telescopic boom device.

[0077] Furthermore, the telescopic boom device also includes:

[0078] The second pad assembly 13 is disposed between the first telescopic arm 2 and the second telescopic arm 3 and connected to the second telescopic arm 3 or the first telescopic arm 2.

[0079] Specifically, the second pad assembly 13 includes a third pad unit and a fourth pad unit. The third pad unit is located at the end of the second telescopic arm 3 near the frame and includes a fifth pad and a sixth pad located above and below the second telescopic arm 3, respectively. The fourth pad unit is located at the end of the second telescopic arm 3 away from the frame and includes a seventh pad and an eighth pad located above and below the second telescopic arm 3, respectively. The above arrangement can prevent the second telescopic arm 3 and the first telescopic arm 2 from directly contacting and rubbing against each other when the second telescopic arm 3 moves laterally or bends, thus protecting the second telescopic arm 3 and the first telescopic arm 2.

[0080] In one embodiment of this application, the telescopic boom device further includes a slider 11 disposed at the bottom of the first cylinder portion 402 and movable laterally within the second telescopic boom 3.

[0081] Specifically, the telescopic boom device in this embodiment further includes a second connecting seat assembly 15 disposed at one end of the first cylinder section 402 near the frame. The second connecting seat assembly 15 includes a third connecting seat 1501, a fourth connecting seat 1502, and a second connecting pin 1503. The third connecting seat 1501 is connected to the bottom of the first cylinder section 402 near the frame. The fourth connecting seat 1502 is disposed inside the first telescopic arm 2 and connected to the bottom wall of the first telescopic arm 2. The third connecting seat 1501 and the fourth connecting seat 1502 are rotatably connected by the second connecting pin 1503. The above arrangement, together with the slider 11, can ensure the stability and connection reliability of the first cylinder section 402 after installation. The slider 11 can not only support the first cylinder section 402, but also prevent the first cylinder section 402 from directly contacting and rubbing against the second telescopic arm 3 while the second telescopic arm 3 moves laterally, thus preventing the first cylinder section 402 from being damaged by friction.

[0082] Furthermore, in this embodiment, the number of telescopic arms is not limited to two. The telescopic boom device may also include a third telescopic arm, which partially extends into the interior of the second telescopic arm 3 and can move laterally. When the telescopic boom device includes a third telescopic arm, it also includes a third telescopic drive component for driving the third telescopic arm. The first, second, and third telescopic drive components are all disposed inside the third telescopic arm. The third telescopic drive component includes a relatively movable third telescopic rod portion and a third cylinder portion. The third cylinder portion is connected to the third telescopic arm. The first end of the third telescopic rod portion extends into the third cylinder portion, and the second end of the third telescopic rod portion is connected to the second telescopic arm 3 and can move vertically. When the third telescopic arm is in an extended state and the end away from the frame has a certain amount of load, the second end of the third telescopic drive component can adaptively move vertically to keep the third telescopic drive component straight at all times, ensuring that the third telescopic drive component is not affected by the bending of the fixed arm, the first telescopic arm, the second telescopic arm, and the third telescopic arm as a whole. Furthermore, when the telescopic boom device includes a third telescopic boom, the number of components such as connecting components, connecting columns, stop components, and pad components is also adaptively increased and adapted to be connected with other components.

[0083] Another embodiment of this application provides an engineering machine that includes the telescopic boom device described in the above embodiment.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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 telescopic boom device, characterized in that, The telescopic boom device includes: Fixed arm (1); The first telescopic arm (2) extends partially into the interior of the fixed arm (1) and is movable laterally; The first telescopic drive member (4) includes a first telescopic rod portion (401) and a first cylinder portion (402) that are movable relative to each other. The first cylinder portion (402) is located inside the first telescopic arm (2) and is connected to the first telescopic arm (2). The first end of the first telescopic rod portion (401) extends into the first cylinder portion (402), and the second end of the first telescopic rod portion (401) is connected to the fixed arm (1) and can move vertically.

2. The telescopic boom device according to claim 1, characterized in that, The telescopic boom device also includes: A first connecting component (6) is disposed on the fixed arm (1) and has two first connecting slots (601) that are distributed opposite to each other, the first connecting slots (601) being distributed vertically; The first connecting post (7) passes through the end of the first telescopic rod (401) away from the first cylinder (402), and the two ends of the first connecting post (7) are respectively movably disposed in the two first connecting grooves (601).

3. The telescopic boom device according to claim 2, characterized in that, The telescopic boom device also includes: A first stop assembly is disposed on the first connecting assembly (6) and is used to limit the movement distance of the first connecting post (7) in the first connecting groove (601).

4. The telescopic boom device according to claim 2, characterized in that, The first connecting groove (601) is U-shaped.

5. The telescopic boom device according to claim 2, characterized in that, The first connecting column (7) has a first cutting part (701) at both axial ends, and the first cutting part (701) and the vertical sidewall of the first connecting groove (601) form a surface contact.

6. The telescopic boom device according to claim 2, characterized in that, The first connecting component (6) is detachably mounted on the fixed arm (1).

7. The telescopic boom device according to claim 1, characterized in that, The telescopic boom device also includes: The first pad assembly (12) is disposed between the first telescopic arm (2) and the fixed arm (1) and connected to the first telescopic arm (2) or the fixed arm (1).

8. The telescopic boom device according to any one of claims 1-7, characterized in that, The telescopic boom device also includes: The second telescopic arm (3) extends partially into the interior of the first telescopic arm (2) and can move laterally; The second telescopic drive member (5) is located above the first telescopic drive member (4) and includes a second telescopic rod part (501) and a second cylinder part (502) that can move relative to each other. The second cylinder part (502) is disposed inside the second telescopic arm (3) and its two ends are respectively connected to the first telescopic arm (2) and the second telescopic arm (3). The first end of the second telescopic rod part (501) extends into the second cylinder part (502), and the second end of the second telescopic rod part (501) is connected to the first telescopic arm (2) and can move vertically. The cylinder connector (10) is vertically movable and mounted on the second telescopic arm (3) and connected to the second cylinder part (502).

9. The telescopic boom device according to claim 8, characterized in that, The telescopic boom device also includes a slider (11) disposed at the bottom of the first cylinder section (402) and movable laterally within the second telescopic boom (3).

10. An engineering machinery, characterized in that, The construction machinery includes a telescopic boom device according to any one of claims 1-9.

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