Telescopic boom and engineering machine

Abstract

The application relates to the technical field of arm frame telescoping, and discloses a telescopic arm frame and engineering machinery, which comprises an outer arm section, an inner arm section and a spring-pressed inner support assembly. The inner arm section is inserted into the outer arm section, and the inner arm section and the outer arm section can move relative to each other along the length direction of the arm frame. The spring-pressed inner support assembly comprises an inner support structure, an elastic structure and a spacing adjusting structure. The elastic structure is elastically pressed between the inner support structure and the outer circumferential wall of the inner arm section. The inner support structure is pressed to the inner circumferential wall of the outer arm section. The spacing adjusting structure can adjust the spacing between the outer circumferential wall of the inner arm section and the inner support structure. The telescopic arm frame and the engineering machinery can adaptively adjust the position of the inner support structure, so that the inner support structure can keep abutting against the inner circumferential wall of the outer arm section, thereby improving the stability of arm frame telescoping, and facilitating the adjustment of the spacing between the outer circumferential wall of the inner arm section and the inner support structure, and improving the arm frame assembly efficiency.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of arm support telescoping, and particularly relates to a telescopic arm support and engineering machinery. BACKGROUND

[0002] In the design and manufacture of telescopic arm supports, a certain assembly gap is required for the relative movement between different arm sections, which helps to avoid the jamming phenomenon caused by friction and ensure smooth operation. In order to improve the stability of the arm support structure and reduce problems such as abnormal noise and shaking, a sliding block is usually introduced in the assembly gap, which contacts the inner wall surface of the arm support through the contact surface of the sliding block, thereby improving the stability of the telescopic arm support. However, the current arm support structure has high precision requirements, and slight deviation in the installation position or installation angle of the sliding block will cause the surface contact to become line contact, resulting in a decrease in the stability of the telescopic arm support. SUMMARY

[0003] In view of at least one of the above defects or deficiencies of the prior art, the present application provides a telescopic arm support and engineering machinery, which can improve the stability of the telescopic arm support and the assembly efficiency of the arm support.

[0004] To achieve the above-mentioned purpose, in one aspect, the present application provides a telescopic arm support, comprising:

[0005] an outer arm section;

[0006] an inner arm section inserted into the outer arm section, the inner arm section being capable of moving relative to the outer arm section along the length direction of the arm support; and

[0007] a spring-pressed inner support assembly comprising an inner support structure, an elastic structure, and a spacing adjustment structure, the elastic structure being elastically pressed between the inner support structure and the outer peripheral wall of the inner arm section, the inner support structure being pressed against the inner peripheral wall of the outer arm section, and the spacing adjustment structure being capable of adjusting the spacing between the outer peripheral wall of the inner arm section and the inner support structure.

[0008] In some embodiments, the spacing adjustment structure comprises a threaded column and a threaded hole, the threaded hole being arranged in the inner support structure, and the threaded column being arranged in the inner arm section and penetrating the threaded hole to form a threaded fit.

[0009] In some embodiments, the outer peripheral wall of the inner arm section is formed with an arm section through hole, the threaded column is formed as a bolt movably penetrating the arm section through hole, and the nut of the bolt is limited on one side of the inner peripheral wall of the inner arm section.

[0010] In some embodiments, in the state that the inner support structure is elastically pressed against the inner peripheral wall of the outer arm section, a limited spacing gap is formed between the nut and the inner peripheral wall of the inner arm section.

[0011] In some embodiments, the circumferential wall of the inner support structure is formed with a structure through hole, and the spacing adjustment structure comprises a nut arranged in the structure through hole, and the threaded hole is formed in the nut.

[0012] In some embodiments, the elastic structure is partially arranged in the threaded hole and is pressed between the nut and the outer circumferential wall of the inner arm section.

[0013] In some embodiments, the elastic structure is formed as a spring sleeved outside the threaded column.

[0014] In some embodiments, the elastic structure is a helical compression spring, a ring spring or a butterfly spring.

[0015] In some embodiments, the inner support structure is formed as a support slider, and a planar joint is formed between the outer circumferential wall of the inner support structure and the inner circumferential wall of the outer arm section.

[0016] Another aspect of the present application provides an engineering machine comprising the telescopic arm support.

[0017] Through the above technical solution, even if the spacing between the inner arm section and the outer arm section changes, the telescopic arm support of the present application can adaptively adjust the position of the inner support structure by using the elastic structure, so that the inner support structure can be kept in contact with the inner circumferential wall of the outer arm section, reducing vibration and noise and improving the stability of the telescopic arm support. In addition, when adjusting the spacing between the inner arm section and the outer arm section, only the spacing between the outer circumferential wall of the inner arm section and the inner support structure needs to be adjusted by the spacing adjustment structure, so that the spacing between the inner arm section and the outer arm section can be determined, making the spacing adjustment more convenient and fast, and enhancing the flexibility and assembly efficiency of the equipment operation.

[0018] Other features and advantages of the embodiments of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For those skilled in the art, other drawings can be obtained from the structures shown in the drawings without creative labor. In the drawings:

[0020] Figure 1 is a schematic view of a telescopic arm support in the embodiments of the present application;

[0021] Figure 2 is Figure 1 a schematic view of the inner support structure and the spacing adjustment structure in the telescopic arm support.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 1 outer arm segment 2 inner arm segment

[0024] 3 inner support structure 4 elastic structure

[0025] 5 spacing adjustment structure 301 structure through hole

[0026] 501 threaded column 502 screw cap

[0027] 503 nut DETAILED DESCRIPTION

[0028] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0029] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0030] In the assembly and adjustment process of the telescopic arm support, it is a common method to adjust the size of the assembly gap by adding or reducing the gaskets on the sliding block or by pushing the sliding block with bolts. However, these adjustment methods can cause some potential problems and challenges, for example, when adding or reducing the gaskets, if the gasket thickness is inconsistent or the installation is uneven, it will cause uneven assembly gap, which will affect the overall performance of the arm support, and increase the complexity and labor intensity of maintenance, and reduce the work efficiency.

[0031] Therefore, as shown in Figure 1 and Figure 2 , the present application provides a telescopic arm support, which comprises an outer arm segment 1, an inner arm segment 2 and a spring-pressed inner support assembly. The inner arm segment 2 is inserted into the outer arm segment 1, and the assembly gap is formed between the inner arm segment 2 and the outer arm segment 1, so that the inner arm segment 2 and the outer arm segment 1 can move relatively along the length direction of the arm support, thereby realizing the telescopic function of the arm support. The spring-pressed inner support assembly comprises an inner support structure 3, an elastic structure 4 and a spacing adjustment structure 5, wherein the elastic structure 4 is elastically pressed between the inner support structure 3 and the outer peripheral wall of the inner arm segment 2, the inner support structure 3 is pressed to the inner peripheral wall of the outer arm segment 1, and the spacing adjustment structure 5 can adjust the spacing between the outer peripheral wall of the inner arm segment 2 and the inner support structure 3.

[0032] Therefore, when the distance between the inner arm section 2 and the outer arm section 1 changes, for example, the inner arm section 2 and the outer arm section 1 are deformed or offset, the elastic structure 4 can be elastically adjusted to adaptively adjust the position of the inner support structure 3, so that the inner support structure 3 can be kept in contact with the inner peripheral wall of the outer arm section 1, reducing the generation of vibration and noise, thereby improving the stability of the telescopic arm. In addition, when adjusting the distance between the inner arm section 2 and the outer arm section 1, only the distance between the outer peripheral wall of the inner arm section 2 and the inner support structure 3 needs to be adjusted by the distance adjusting structure 5, that is, the elastic extension amount of the elastic structure 4 is adjusted, so that the distance between the inner arm section 2 and the outer arm section 1 can be determined, so that the distance adjustment is more convenient and fast, and the flexibility of the equipment operation is enhanced.

[0033] The adjustment mechanism of the distance adjusting structure 5 can be manual adjustment or automatic adjustment such as electric adjustment, which will not be listed one by one here. Taking manual adjustment as an example, the distance adjustment can be achieved by threaded cooperation between structures, or by the structure form of gear and slide rail engagement. In this embodiment, taking the structure form of threaded cooperation as an example, referring to Figure 1 and Figure 2 , the distance adjusting structure 5 includes a threaded column 501 and a threaded hole, wherein the threaded hole is arranged in the inner support structure 3, and the threaded column 501 is arranged in the inner arm section 2 and penetrates the threaded hole to form threaded cooperation. Specifically, the threaded column 501 extends outward from the outer peripheral wall of the inner arm section 2 to penetrate the threaded hole. Therefore, in the case that the threaded column 501 is arranged to be fixedly connected to the inner arm section 2, the distance between the inner support structure 3 and the inner arm section 2 can be adjusted by rotating the inner support structure 3.

[0034] In addition, in the case that the threaded column 501 is arranged to be rotatably connected to the inner arm section 2, the distance between the inner support structure 3 and the inner arm section 2 can also be adjusted by rotating the inner support structure 3 or the threaded column 501.

[0035] Specifically, as shown in Figure 1 , the outer peripheral wall of the inner arm section 2 is formed with an arm section through hole (not shown in the figure), and the threaded column 501 is formed as a bolt movably penetrating the arm section through hole, wherein the nut 502 of the bolt is limited on one side of the inner peripheral wall of the inner arm section 2. Therefore, when it is necessary to adjust the distance between the inner support structure 3 and the inner arm section 2, the adjustment can be completed by rotating the nut 502, in the process, the nut 502 abuts on the outer peripheral wall of the inner arm section 2, and the inner support structure 3 can move along the length direction of the bolt to approach or move away from the inner peripheral wall of the inner arm section 2, at this time, the elastic structure 4 between the inner support structure 3 and the inner peripheral wall of the inner arm section 2 can be further compressed or elongated.

[0036] In the state that the inner support structure 3 elastically presses the inner peripheral wall of the outer arm segment 1, a limited spacing gap is formed between the screw cap 502 and the inner peripheral wall of the inner arm segment 2. Thus, when the spacing between the inner arm segment 2 and the outer arm segment 1 becomes larger, the inner support structure 3 can move to the inner peripheral wall of the outer arm segment 1 under the driving of the elastic structure 4, so that the inner support structure 3 remains pressed to the inner peripheral wall of the inner support structure 3, and by reserving the limited spacing gap, the screw cap 502 will not contact the inner peripheral wall of the inner arm segment 2 during the movement of the inner support structure 3, avoiding the limitation of the movement adjustment of the inner support structure 3.

[0037] In Figure 2 In the embodiment shown, the peripheral wall of the inner support structure 3 is formed with a structure through hole 301, and the spacing adjustment structure 5 includes a nut 503 arranged in the structure through hole 301, and the threaded hole mentioned above is formed in the nut 503. Thus, the threaded column 501 extending outwardly from the outer peripheral wall of the inner arm segment 2 can pass through the structure through hole 301 and be connected to the nut 503, and the structure through hole 301 can provide sufficient movement space for the threaded column 501 when moving relative to the nut 503, avoiding interference with the body of the inner support structure 3.

[0038] Further, the elastic structure 4 is partially arranged in the threaded hole and is pressed between the nut 503 and the outer peripheral wall of the inner arm segment 2. In other words, the nut 503 can not only participate in the position adjustment of the inner support structure 3 as the spacing adjustment structure 5, but also can be used as the abutting surface of the elastic structure 4 to bear the elastic force of the elastic structure 4, avoiding the direct action of the elastic structure 4 on the peripheral wall of the inner support structure 3. In addition, the structure through hole 301 can provide sufficient space for the elastic structure 4 to perform elastic expansion and contraction movement, and the inner peripheral wall of the structure through hole 301 can limit the elastic structure 4, that is, play a guiding role, thereby improving the expansion and contraction stability of the elastic structure 4.

[0039] Further, the elastic structure 4 is formed as a spring sleeved outside the threaded column 501, and the threaded column 501 effectively limits the spring, thereby further improving the expansion and contraction stability of the elastic structure 4. Preferably, a spiral compression spring, a ring spring or a butterfly spring can be used as the elastic structure 4, and in the case of multiple elastic structures 4, one or more of the spiral compression spring, the ring spring and the butterfly spring can be used as the elastic structure 4. It can be understood that the spiral compression spring, the ring spring and the butterfly spring are all high-strength springs, which can bear a high load, provide sufficient support force for the inner support structure 3, and effectively reduce the volume of the elastic structure 4, so that the elastic structure 4 can provide greater elastic force in a limited space, and is suitable for narrow or complex installation environments. In some other embodiments, the elastic structure 4 can also be an elastic member such as a rubber member or a gas spring, which is not limited in the present application.

[0040] In an optional or preferred embodiment, the inner support structure 3 is formed as a supporting slider, and a planar connection is formed between the outer peripheral wall of the inner support structure 3 and the inner peripheral wall of the outer arm section 1, thereby increasing the contact area between the inner support structure 3 and the inner peripheral wall of the outer arm section 1 and ensuring the stability of the arm extension.

[0041] It should be noted that in Figure 1 In the embodiment shown, two spring-loaded inner support assemblies are provided, both of which are arranged at the tail of the inner boom section 2. However, the present invention does not limit the specific location and number of the spring-loaded inner support assemblies. In actual application, the spring-loaded inner support assemblies can even be arranged on the peripheral wall of the outer boom section 1, so that the inner support structure 3 in the spring-loaded inner support assembly can reversely support the inner peripheral wall of the inner boom section 2, which can also play a role in improving the stability of the boom extension. Figure 2 In the illustrated embodiment, the internal support structure 3 is provided with two structural through-holes 301, and two elastic structures 4 and two nuts 503 are respectively disposed in the two structural through-holes 301. Accordingly, this embodiment also provides two threaded columns 501, which are respectively connected to the two nuts 503, thereby improving the stability of the internal support structure 3. Similarly, the present invention does not limit the number of elastic structures 4 and spacing adjustment structures 5 provided.

[0042] The second exemplary embodiment of the present invention provides an engineering machine including the telescopic boom described above. Obviously, the engineering machine of this exemplary embodiment has all the technical features brought by the telescopic boom described above, so they will not be described in detail here.

[0043] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0044] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0045] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0046] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A telescopic boom, characterized in that: include: Outer arm segment (1); An inner arm section (2) is inserted into the outer arm section (1), and the inner arm section (2) and the outer arm section (1) are capable of relative movement along the length direction of the arm frame; and The elastic-pressure internal support assembly comprises an internal support structure (3), an elastic structure (4) and a spacing adjustment structure (5), wherein the elastic structure (4) is elastically pressed between the internal support structure (3) and the outer peripheral wall of the inner arm section (2), the internal support structure (3) is pressed against the inner peripheral wall of the outer arm section (1), and the spacing adjustment structure (5) can adjust the spacing between the outer peripheral wall of the inner arm section (2) and the internal support structure (3).

2. The telescopic boom according to claim 1, characterized in that: The spacing adjustment structure (5) comprises a threaded column (501) and a threaded hole, wherein the threaded hole is arranged in the inner support structure (3), and the threaded column (501) is arranged in the inner arm section (2) and passes through the threaded hole to form a threaded fit.

3. The telescopic boom according to claim 2, characterized in that: An arm section through-hole is formed through the outer peripheral wall of the inner arm section (2); the threaded column (501) is formed as a bolt that can movably pass through the arm section through-hole; and the nut (502) of the bolt is limited on one side of the inner peripheral wall of the inner arm section (2).

4. The telescopic boom according to claim 3, characterized in that: When the inner support structure (3) is in elastic contact with the inner peripheral wall of the outer arm section (1), a limited gap is formed between the nut (502) and the inner peripheral wall of the inner arm section (2).

5. The telescopic boom according to claim 2, characterized in that: A structural through hole (301) is formed through the peripheral wall of the inner support structure (3), and the spacing adjustment structure (5) includes a nut (503) arranged in the structural through hole (301), and the threaded hole is formed in the nut (503).

6. The telescopic boom according to claim 5, characterized in that: The elastic structure (4) is partially inserted into the threaded hole and is pressed between the nut (503) and the outer peripheral wall of the inner arm section (2).

7. The telescopic boom according to claim 2, characterized in that: The elastic structure (4) is formed as a spring sleeved outside the threaded column (501).

8. The telescopic boom according to claim 7, characterized in that: The elastic structure (4) is a helical compression spring, an annular spring or a butterfly spring.

9. The telescopic boom according to any one of claims 1 to 8, characterized in that: The inner support structure (3) is formed as a supporting slider, and a plane connection is formed between the outer peripheral wall of the inner support structure (3) and the inner peripheral wall of the outer arm section (1).

10. An engineering machine, characterized in that: Comprising a telescopic boom according to any one of claims 1 to 9.

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