Telescopic boom and engineering machinery

Abstract

The invention relates to the technical field of arm support stretching and retracting, and discloses a telescopic arm support and engineering machine.The telescopic arm support comprises an outer arm section, an inner arm section and an elastic pressing type inner supporting assembly, the inner arm section is inserted into the outer arm section, and the inner arm section and the outer arm section can relatively move in the length direction of the arm support; the elastic pressing type inner supporting assembly comprises an inner supporting structure, an elastic structure and a distance adjusting structure, the elastic structure is elastically connected between the inner supporting structure and the outer circumferential wall of the inner arm section in a pressed mode, the inner supporting structure is connected with the inner circumferential wall of the outer arm section in a pressed mode, and the distance adjusting structure can adjust the distance between the outer circumferential wall of the inner arm section and the inner supporting structure. According to the telescopic boom and the engineering machine, the position of the inner supporting structure can be adjusted in a self-adaptive mode, so that the inner supporting structure can be kept abutting against the inner peripheral wall of the outer boom section, the telescopic stability of the boom is improved, the distance between the outer peripheral wall of the inner boom section and the inner supporting structure is conveniently adjusted, and the assembling efficiency of the boom is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of telescopic booms, and specifically relates to telescopic booms and engineering machinery. Background Art

[0002] In the design and manufacture of telescopic booms, the relative movement between different boom sections requires a certain assembly gap, which helps to avoid jamming caused by friction and ensures smooth operation. In order to improve the stability of the boom structure and reduce problems such as abnormal noise and shaking, a slider is usually introduced into the assembly gap, and the contact surface of the slider contacts the inner wall surface of the boom, thereby improving the stability of the boom extension. However, the current requirements for the accuracy of the boom structure are relatively high. A slight deviation in the installation position or installation angle of the slider will cause the surface contact to become line contact, which reduces the stability of the boom extension. Summary of the invention

[0003] In view of at least one of the above-mentioned defects or shortcomings of the prior art, the present application provides a telescopic boom and engineering machinery, which can improve the stability of boom telescopic operation and the assembly efficiency of the boom.

[0004] In order to achieve the above-mentioned object, the present application provides a telescopic boom, comprising:

[0005] outer arm segment;

[0006] An inner arm section, inserted into the outer arm section, wherein the inner arm section and the outer arm section can move relative to each other along the length direction of the boom; and

[0007] The spring-loaded inner support assembly comprises an inner support structure, an elastic structure and a spacing adjustment structure. The elastic structure is elastically pressed between the inner support structure and the outer peripheral wall of the inner arm section. The inner support structure is pressed against the inner peripheral wall of the outer arm section. The spacing adjustment structure can adjust 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 includes a threaded column and a threaded hole, wherein the threaded hole is disposed in the inner support structure, and the threaded column is disposed in the inner arm section and penetrates the threaded hole to form a threaded fit.

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

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

[0011] In some embodiments, a structural through hole is formed through a peripheral wall of the inner support structure, and the spacing adjustment structure includes a nut disposed in the structural through hole, and the threaded hole is formed in the nut.

[0012] In some embodiments, the elastic structure partially penetrates into the threaded hole and is crimped between the nut and the outer peripheral 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, an annular spring or a butterfly spring.

[0015] In some embodiments, the inner support structure is formed as a supporting sliding block, and a planar connection is formed between an outer peripheral wall of the inner support structure and an inner peripheral wall of the outer arm section.

[0016] On the other hand, the present application provides an engineering machinery, comprising the above-mentioned telescopic boom.

[0017] Through the above technical solution, even if the distance between the inner arm section and the outer arm section changes, the telescopic boom of the present application can also use the elastic structure to adaptively adjust the position of the inner support structure, so that the inner support structure can maintain contact with the inner peripheral wall of the outer arm section, reduce vibration and noise, and improve the stability of the boom extension. In addition, when adjusting the distance between the inner arm section and the outer arm section, it is only necessary to adjust the distance between the outer peripheral wall of the inner arm section and the inner support structure through the distance adjustment structure to determine the distance between the inner arm section and the outer arm section, making the distance adjustment more convenient and quick, and enhancing the flexibility of equipment operation and assembly efficiency.

[0018] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0020] Figure 1 It is a schematic diagram of a telescopic boom in a specific implementation manner of the present application;

[0021] Figure 2 for Figure 1 Schematic diagram of the internal support structure and spacing adjustment structure in the telescopic boom.

[0022] Description of Reference Numerals

[0023] 1 outer arm section 2 inner arm section

[0024] 3 Internal support structure 4 Elastic structure

[0025] 5 Spacing adjustment structure 301 Structural through hole

[0026] 501 Threaded column 502 Nut

[0027] 503 Nut DETAILED DESCRIPTION

[0028] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used 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] During the assembly and adjustment of the telescopic boom, it is a common method to adjust the size of the assembly gap by adding or removing shims on the slider or pushing the slider through bolts. However, these adjustment methods will cause some potential problems and challenges. For example, when adding or removing shims, if the thickness of the shims is inconsistent or the installation is uneven, it will lead to uneven assembly gaps, which will affect the overall performance of the boom, increase the complexity and labor intensity of maintenance, and reduce work efficiency.

[0031] In view of this, if Figure 1 and Figure 2 As shown, the present application provides a telescopic boom, which includes an outer arm section 1, an inner arm section 2 and a spring-loaded inner support assembly. The inner arm section 2 is inserted into the outer arm section 1, and an assembly gap is formed between the inner arm section 2 and the outer arm section 1, so that the inner arm section 2 and the outer arm section 1 can move relative to each other along the length direction of the boom, thereby realizing the telescopic boom. The spring-loaded inner support assembly includes an inner support structure 3, an elastic structure 4 and a spacing adjustment structure 5, wherein the elastic structure 4 is elastically crimped between the inner support structure 3 and the outer peripheral wall of the inner arm section 2, the inner support structure 3 is crimped to 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 inner support structure 3.

[0032] Thus, when the distance between the inner arm section 2 and the outer arm section 1 changes, for example, when deformation or offset occurs between the inner arm section 2 and the outer arm section 1, the position of the inner support structure 3 can be adaptively adjusted through the telescopic change of the elastic structure 4, so that the inner support structure 3 can maintain contact with the inner peripheral wall of the outer arm section 1, reduce the generation of vibration and noise, and thus improve the stability of the telescopic boom. In addition, when adjusting the distance between the inner arm section 2 and the outer arm section 1, it is only necessary to adjust the distance between the outer peripheral wall of the inner arm section 2 and the inner support structure 3 through the distance adjustment structure 5, that is, adjust the elastic telescopic amount of the elastic structure 4, so as to determine the distance between the inner arm section 2 and the outer arm section 1, making the distance adjustment more convenient and quick, and enhancing the flexibility of the equipment operation.

[0033] The adjustment mechanism of the spacing adjustment structure 5 can be manual adjustment or automatic adjustment such as electric adjustment, which will not be listed here. Taking manual adjustment as an example, the spacing adjustment can be achieved by threaded fit between structures, or by the meshing structure of gears and slide rails. In this embodiment, the threaded fit structure is taken as an example, referring to Figure 1 and Figure 2 , the spacing adjustment structure 5 includes a threaded column 501 and a threaded hole, wherein the threaded hole is provided in the inner support structure 3, and the threaded column 501 is provided in the inner arm section 2 and penetrates the threaded hole to form a threaded fit. Specifically, the threaded column 501 extends outward from the outer peripheral wall of the inner arm section 2 and penetrates the threaded hole. Thus, when the threaded column 501 is provided to be fixedly connected to the inner arm section 2, the spacing 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, when the threaded column 501 is configured 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 rotating the threaded column 501 .

[0035] Specifically, Figure 1 As shown, the outer peripheral wall of the inner arm section 2 is penetrated with an arm section through hole (not shown in the drawings), and the threaded column 501 is formed as a bolt that can be movably connected to the arm section through hole, wherein the nut 502 of the bolt is limited to one side of the inner peripheral wall of the inner arm section 2. Therefore, when it is necessary to adjust the spacing between the inner support structure 3 and the inner arm section 2, the adjustment can be completed by rotating the nut 502. During the process, the nut 502 abuts against 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, thereby approaching or moving away from the inner peripheral wall of the inner arm section 2. At this time, the elastic structure 4 located between the inner support structure 3 and the inner peripheral wall of the inner arm section 2 can be further compressed or extended.

[0036] When the inner support structure 3 is in elastic contact with the inner circumference of the outer arm section 1, a limited clearance is formed between the nut 502 and the inner circumference of the inner arm section 2. Therefore, when the distance between the inner arm section 2 and the outer arm section 1 increases, the inner support structure 3 can move toward the inner circumference of the outer arm section 1 under the drive of the elastic structure 4, so that the inner support structure 3 remains in contact with the inner circumference of the inner support structure 3. By reserving the limited clearance, the nut 502 will not contact the inner circumference of the inner arm section 2 during the movement of the inner support structure 3, thereby avoiding limiting the movement and adjustment of the inner support structure 3.

[0037] exist Figure 2 In the illustrated embodiment, 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 disposed in the structural through hole 301, and the above-mentioned threaded hole is formed in the nut 503. Therefore, the threaded column 501 extending outward from the outer peripheral wall of the inner arm section 2 can pass through the structural through hole 301 and then be connected to the nut 503. The structural through hole 301 can provide sufficient moving space for the threaded column 501 when it moves relative to the nut 503, avoiding interference with the body of the inner support structure 3.

[0038] Furthermore, the elastic structure 4 is partially inserted into the threaded hole and crimped between the nut 503 and the outer peripheral wall of the inner arm section 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 serve as the abutment surface of the elastic structure 4, bear the elastic force of the elastic structure 4, and prevent the elastic structure 4 from directly acting on the peripheral wall of the inner support structure 3. In addition, the structural through hole 301 can provide enough space for the elastic structure 4 to move elastically, and limit the elastic structure 4 through the inner peripheral wall of the structural through hole 301, that is, play a guiding role, thereby improving the telescopic stability of the elastic structure 4.

[0039] Furthermore, the elastic structure 4 is formed as a spring sleeved outside the threaded column 501, and the threaded column 501 is used to effectively limit the spring, thereby further improving the telescopic stability of the elastic structure 4. Preferably, a helical compression spring, annular spring or butterfly spring can be used as the elastic structure 4. In the case where multiple elastic structures 4 are provided, one or more of the helical compression spring, annular spring and butterfly spring can be used as the elastic structure 4. It can be understood that the helical compression spring, annular spring and butterfly spring are all high-strength springs that can withstand higher loads, provide sufficient support force for the internal 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, which is suitable for small or complex installation environments. In some other embodiments, the elastic structure 4 can also be an elastic member such as a rubber part, a gas spring, etc., which is not limited in this 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 peripheral wall of the inner support structure 3 and 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, and both spring-loaded inner support assemblies are arranged at the tail of the inner arm section 2, but the present application does not limit the specific arrangement position and quantity of the spring-loaded inner support assemblies. In practical applications, the spring-loaded inner support assemblies can even be arranged on the peripheral wall of the outer arm 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 arm section 2, and can also play a role in improving the stability of the boom extension. Figure 2 In the embodiment shown, the inner support structure 3 is provided with two structural through holes 301, and two elastic structures 4 and two nuts 503 are respectively arranged in the two structural through holes 301. Accordingly, the embodiment is also provided with two threaded columns 501 respectively correspondingly connected with the two nuts 503, thereby improving the stability of the inner support structure 3. Similarly, the present application does not limit the number of elastic structures 4 and spacing adjustment structures 5.

[0042] The second exemplary embodiment of the present application provides an engineering machine, comprising 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 application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this 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 can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A telescopic boom, characterized in that: include: Outer brachial 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 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 section (2), the inner 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 inner 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 penetrates 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 pressure 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) comprises 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 crimped 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 sliding block, 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).

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

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