Adjustable assembly shaft for hydraulic support base

Abstract

The utility model relates to the technical field of hydraulic support assembly, in particular to an adjustable assembly shaft for a hydraulic support base. The adjustable assembly shaft comprises a mounting shaft, a first sliding shaft sleeve and a second sliding shaft sleeve, the mounting shaft comprises a positioning shaft section and an adjusting shaft section which are coaxially arranged, the diameter of the positioning shaft section is smaller than that of the adjusting shaft section, and the first sliding shaft sleeve is slidably arranged on the positioning shaft section in a sleeving mode and detachably connected with the positioning shaft section; the second sliding shaft sleeve is slidably arranged on the adjusting shaft section in a sleeving mode and detachably connected with the adjusting shaft section. The first sliding shaft sleeve and the second sliding shaft sleeve can slide on the mounting shaft and can be selectively fixed, so that the hydraulic support base is suitable for hydraulic support bases of different sizes. Due to the fact that the positioning shaft section is fixedly connected with the adjusting shaft section, stability and safety in the assembling process are improved. Due to the fact that the first sliding shaft sleeve and the second sliding shaft sleeve are convenient to disassemble and reinstall, the maintenance cost of the adjustable assembly shaft is low, and an operator can maintain and replace the adjustable assembly shaft conveniently in the using process.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic support assembly technology, and in particular to an adjustable assembly shaft for a hydraulic support base. Background Technology

[0002] To ensure the accuracy, quality, and efficiency of the assembly and positioning of hydraulic support structural components, it is necessary to design and manufacture a special assembly shaft. This allows operators to easily ensure the accuracy and consistency of part positioning during assembly, thereby saving assembly time and improving production efficiency.

[0003] Currently, the modularity of hydraulic support base design is not high. Therefore, each time a new assembly shaft needs to be designed and manufactured based on the hydraulic support base, the assembly shaft cannot flexibly adapt to hydraulic support bases of different sizes, thus affecting production efficiency and flexibility. Although the assembly shafts have the same shape, their dimensions differ, requiring the design to ensure that each assembly shaft meets specific dimensional and precision requirements. Oversights in design or manufacturing may lead to poor matching between the assembly shaft and the hydraulic support base, affecting quality and safety. Furthermore, manufacturing and storing these assembly shafts consumes additional resources. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an adjustable assembly shaft for a hydraulic support base, which solves the technical problems of low production efficiency, poor flexibility, insufficient precision, resulting in low product quality and safety, as well as low resource utilization of the assembly shaft.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0008] This utility model provides an adjustable assembly shaft for a hydraulic support base, including a mounting shaft, a first sliding bushing, and a second sliding bushing. The mounting shaft includes a positioning shaft section and an adjusting shaft section coaxially arranged. The positioning shaft section is fixedly connected to the adjusting shaft section, and the diameter of the positioning shaft section is smaller than the diameter of the adjusting shaft section. The first sliding bushing is slidably fitted onto the positioning shaft section and detachably connected to it. The second sliding bushing is slidably fitted onto the adjusting shaft section and detachably connected to it. The positioning shaft section and the adjusting shaft section can be respectively inserted into the central rib assembly and the outer main rib assembly of the hydraulic support base. The first sliding bushing can slide along the positioning shaft section to fit against the outer wall of the central rib assembly and can be selectively fixed. The second sliding bushing can slide along the adjusting shaft section to fit against the outer wall of the outer main rib assembly and can be selectively fixed.

[0009] Preferably, the stepped surface where the adjusting shaft section and the positioning shaft section meet can abut against the central rib assembly together with the first sliding bushing.

[0010] Preferably, the central rib assembly has a waist-shaped mounting hole through which the positioning shaft segment can pass; the first sliding bushing includes a first connecting bushing and a first fixed bushing connected to each other; the first fixed bushing is sleeved on the first connecting bushing, the axes of the first connecting bushing and the first fixed bushing coincide, and the two end faces of the first fixed bushing are parallel and symmetrical chordal surfaces; when the first fixed bushing is rotated relative to the positioning shaft segment until its length direction is parallel to the length direction of the mounting hole on the central rib assembly, the first fixed bushing can pass through the mounting hole; when the first fixed bushing is rotated relative to the positioning shaft segment until its length direction is perpendicular to the length direction of the mounting hole on the central rib assembly, the first fixed bushing can fit against the outer wall of the central rib assembly.

[0011] Preferably, the first sliding bushing further includes at least one first locking bolt; the first connecting bushing is provided with the first locking bolt, the first connecting bushing has at least one first positioning hole, the first positioning hole is provided with thread, and the first locking bolt matches the thread of the first positioning hole, and the first locking bolt is connected to the surface of the positioning shaft section through the first positioning hole.

[0012] Preferably, the outer main reinforcement assembly has a circular mounting hole through which the adjusting shaft section can pass; the second sliding bushing includes a second connecting bushing and a second fixed bushing connected to each other; the second fixed bushing is sleeved on the second connecting bushing, and the axes of the second connecting bushing and the second fixed bushing coincide; the second connecting bushing can be selectively fixed to the adjusting shaft section, and the second fixed bushing can fit against the outer wall of the outer main reinforcement assembly.

[0013] Preferably, the second sliding bushing further includes at least one second locking bolt; the second connecting bushing is provided with the second locking bolt, the second connecting bushing has at least one second positioning hole, the second positioning hole is provided with threads, and the second locking bolt matches the threads of the second positioning hole, and the second locking bolt is connected to the surface of the adjusting shaft section through the second positioning hole.

[0014] Preferably, at least one first groove is formed on the positioning shaft section; the first groove is arranged along the axial direction of the positioning shaft section, and the first groove corresponds to the first locking bolt one by one, and the first locking bolt is connected to the bottom surface of the first groove through the first connecting bushing; at least one second groove is formed on the adjusting shaft section; the second groove is arranged along the axial direction of the adjusting shaft section, and the second groove corresponds to the second locking bolt one by one, and the second locking bolt is connected to the bottom surface of the second groove through the second connecting bushing.

[0015] Preferably, there are multiple first positioning holes, multiple second positioning holes, multiple first locking bolts, multiple second locking bolts, multiple first grooves and multiple second grooves. Multiple first positioning holes are evenly distributed along the axis of the first connecting bushing, and multiple first grooves are evenly distributed along the axis of the positioning shaft section. Multiple second positioning holes are evenly distributed along the axis of the second connecting bushing, and multiple second grooves are evenly distributed along the axis of the adjusting shaft section.

[0016] Preferably, a transport sleeve is fitted onto one end of the adjusting shaft section, and the transport sleeve is fixedly connected to the adjusting shaft section, with the axis of the transport sleeve coinciding with that of the adjusting shaft section.

[0017] Preferably, the positioning shaft section, adjusting shaft section, first connecting bushing, second connecting bushing, and second fixed bushing are all cylindrical in shape.

[0018] (III) Beneficial Effects

[0019] The beneficial effects of this utility model are:

[0020] This invention discloses an adjustable assembly shaft for a hydraulic support base. Because the first sliding sleeve can slide along the positioning shaft section to fit against and selectively fix with the outer wall of the central rib assembly of the hydraulic support base, and the second sliding sleeve can slide along the adjustment shaft section to fit against and selectively fix with the outer wall of the outer main rib assembly of the hydraulic support base, the adjustable assembly shaft can quickly and accurately adjust its length and position, thus adapting to hydraulic support bases of different sizes. Furthermore, compared to existing assembly shafts with non-adjustable lengths, it is more convenient to store, reduces storage costs, and improves resource utilization.

[0021] Because the mounting shaft includes a positioning shaft section and an adjusting shaft section, and the diameter of the positioning shaft section is smaller than that of the adjusting shaft section, the positioning shaft section facilitates alignment and positioning, ensuring that each component is installed in the correct position. Since the positioning shaft section and the adjusting shaft section are fixedly connected and machined as a single unit, the surface finish is high, ensuring high assembly accuracy when assembling structural components. This results in secure installation and precise positioning, improving stability and safety during the assembly process.

[0022] Since the first sliding bushing and the second sliding bushing are detachably connected to the positioning shaft section and the adjusting shaft section respectively, it is convenient to disassemble and reinstall the adjustable assembly shaft. This makes the adjustable assembly shaft have low maintenance costs, high replaceability, and convenient replacement of vulnerable parts, making it easy for operators to maintain and replace during use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure when the adjustable assembly shaft used for the hydraulic support base is applied to the hydraulic support.

[0024] Figure 2 for Figure 1An enlarged schematic diagram of part A in the middle;

[0025] Figure 3 This is a schematic diagram of the adjustable assembly shaft used for the hydraulic support base in Example 1;

[0026] Figure 4 for Figure 3 A schematic diagram of the mounting shaft;

[0027] Figure 5 for Figure 3 A partial cross-sectional schematic diagram of the first sliding bushing;

[0028] Figure 6 for Figure 3 A side view of the first sliding bushing;

[0029] Figure 7 for Figure 3 A partial cross-sectional schematic diagram of the second sliding bushing;

[0030] Figure 8 This is a schematic diagram of the adjustable assembly shaft used for the hydraulic support base in Example 2.

[0031] [Explanation of Labels in the Attached Image]

[0032] 1: Mounting shaft; 11: Positioning shaft section; 12: Adjusting shaft section;

[0033] 2: First sliding bushing; 21: First connecting bushing; 22: First fixed bushing; 23: First locking bolt;

[0034] 3: Second sliding bushing; 31: Second connecting bushing; 32: Second fixed bushing; 33: Second locking bolt;

[0035] 4: Handling bushing;

[0036] 5: Hydraulic support base; 51: Intermediate reinforcement assembly; 52: External main reinforcement assembly. Detailed Implementation

[0037] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] Example 1

[0039] like Figure 1 and Figure 2 As shown, this embodiment of the invention proposes an adjustable assembly shaft for a hydraulic support base. The adjustable assembly shaft can be inserted into the hydraulic support base 5 to ensure the positioning accuracy during the assembly of the hydraulic support's structural components. Figure 3As shown, the adjustable assembly shaft includes a mounting shaft 1, a first sliding bushing 2, a second sliding bushing 3, and a transport bushing 4.

[0040] like Figure 4 As shown, the mounting shaft 1 includes a positioning shaft section 11 and an adjusting shaft section 12 coaxially arranged. The central rib assembly 51 of the hydraulic support base 5 has an oblong mounting hole, through which the positioning shaft section 11 can pass; the outer main rib assembly 52 of the hydraulic support base 5 has a circular mounting hole, through which the adjusting shaft section 12 can pass; therefore, the positioning shaft section 11 and the adjusting shaft section 12 can be inserted into the central rib assembly 51 and the outer main rib assembly 52, respectively. To facilitate the alignment and positioning of the mounting shaft 1 and ensure that each component is installed in the correct position, both the positioning shaft section 11 and the adjusting shaft section 12 are circular cross-section shaft sections, with the diameter of the positioning shaft section 11 being smaller than the diameter of the adjusting shaft section 12.

[0041] To improve the assembly accuracy of the hydraulic support when assembling structural components, the positioning shaft section 11 and the adjusting shaft section 12 are fixedly connected and machined as a whole with high surface precision, thereby ensuring that the structural components are installed firmly and positioned accurately, thus improving the stability and safety during the assembly process.

[0042] Specifically, in this embodiment, the mounting shaft 1 consists of a hollow cylindrical shaft and a T-shaped shaft. The T-shaped shaft consists of a disc and a central rod. The disc is inserted into one end of the hollow cylindrical shaft and fixedly connected to it, for example, by welding. The central rod protrudes from the hollow cylindrical shaft. Thus, the hollow cylindrical shaft and the disc form an adjusting shaft section 12, the outer diameter of which constitutes the diameter of the adjusting shaft section 12. The central rod forms a positioning shaft section 11. Of course, this invention is not limited to this. The hollow cylindrical shaft can be solid, and the mounting shaft 1 can be a single, integrally formed shaft or assembled from different components, as long as the adjusting shaft section 12 and the positioning shaft section 11 with the above-mentioned characteristics are formed.

[0043] like Figure 3 As shown, the first sliding bushing 2 is slidably fitted onto the positioning shaft section 11. The first sliding bushing 2 includes a first connecting bushing 21 and a first fixed bushing 22 connected to each other, and at least one first locking bolt 23. Figure 5 and Figure 6 As shown, the first fixed bushing 22 is sleeved on the first connecting bushing 21. The axes of the first connecting bushing 21 and the first fixed bushing 22 coincide. In order to match the waist-shaped mounting hole on the central rib assembly 51, the two end faces of the first fixed bushing 22 are parallel and symmetrical chordal surfaces.

[0044] When the first fixed bushing 22 rotates relative to the positioning shaft segment 11 until its length direction is parallel to the length direction of the mounting hole on the central rib assembly 51, the first fixed bushing 22 can pass through the mounting hole. When the first fixed bushing 22 rotates relative to the positioning shaft segment 11 until its length direction is perpendicular to the length direction of the mounting hole on the central rib assembly 51, the first fixed bushing 22 can fit against the outer wall of the central rib assembly 51. Of course, when the first fixed bushing 22 rotates relative to the positioning shaft segment 11 until its length direction forms an angle with the length direction of the mounting hole on the central rib assembly 51, the first fixed bushing 22 can also fit against the outer wall of the central rib assembly 51, but the stability of this position is poor. Therefore, this utility model aims for the state in which the length direction of the first fixed bushing 22 is perpendicular to the length direction of the mounting hole on the central rib assembly 51, which is the desired state in which the first fixed bushing 22 fits against the outer wall of the central rib assembly 51.

[0045] In order to allow the first sliding bushing 2 to be selectively fixed along the positioning shaft segment 11, such as Figure 3 As shown, the first connecting bushing 21 is provided with a first locking bolt 23, and at least one first positioning hole is formed on the first connecting bushing 21. The first positioning hole is threaded, and the first locking bolt 23 matches the thread of the first positioning hole. The first locking bolt 23 is in contact with the surface of the positioning shaft section 11 through the first positioning hole. By tightening the first locking bolt 23, relative rotation between the connected first connecting bushing 21 and the positioning shaft section 11 can be prevented, thereby improving the working accuracy and stability of the hydraulic support. In order to prevent the first locking bolt 23 from loosening and causing the structural component to fail to assemble, at least one first groove is formed on the positioning shaft section 11. The first groove is set along the axial direction of the positioning shaft section 11, and the first groove corresponds one-to-one with the first locking bolt 23. The first locking bolt 23 is in contact with the bottom surface of the first groove through the first connecting bushing 21.

[0046] like Figure 3 As shown, the second sliding bushing 3 is slidably fitted onto the adjusting shaft section 12. The second sliding bushing 3 includes a second connecting bushing 31 and a second fixed bushing 32 connected together, and at least one second locking bolt 33. Figure 7 As shown, the second fixed bushing 32 is sleeved on the second connecting bushing 31, the second connecting bushing 31 and the second fixed bushing 32 have their axes coincided, and the second fixed bushing 32 can fit against the outer wall of the outer main rib assembly 52.

[0047] In order to allow the second sliding bushing 3 to be selectively fixed along the adjusting shaft section 12, such as Figure 3As shown, the second connecting bushing 31 is provided with a second locking bolt 33, and at least one second positioning hole is formed on the second connecting bushing 31. The second positioning hole is threaded, and the second locking bolt 33 matches the thread of the second positioning hole. The second locking bolt 33 is in contact with the surface of the adjusting shaft section 12 through the second positioning hole. By tightening the second locking bolt 33, relative rotation between the connected second connecting bushing 31 and the adjusting shaft section 12 can be prevented, thereby improving the working accuracy and stability of the hydraulic support. In order to prevent the second locking bolt 33 from loosening and causing the structural component to fail to assemble, at least one second groove is formed on the adjusting shaft section 12. The second groove is set along the axial direction of the adjusting shaft section 12, and the second groove corresponds one-to-one with the second locking bolt 33. The second locking bolt 33 is in contact with the bottom surface of the second groove through the second connecting bushing 31.

[0048] In this embodiment, there are two of each of the following: the first positioning hole, the second positioning hole, the first locking bolt 23, the second locking bolt 33, the first groove, and the second groove. The two first positioning holes are symmetrically opened along the axis of the first connecting bushing 21, the two first grooves are symmetrically opened along the axis of the positioning shaft section 11, the two second positioning holes are symmetrically opened along the axis of the second connecting bushing 31, and the two second grooves are symmetrically opened along the axis of the adjusting shaft section 12.

[0049] It should be noted that the positioning shaft section 11, the adjusting shaft section 12, the first connecting shaft sleeve 21, the second connecting shaft sleeve 31, and the second fixing shaft sleeve 32 are all cylindrical in shape.

[0050] like Figure 2 and Figure 3 As shown, the first fixed bushing 22 can slide along the positioning shaft section 11 to fit against the outer wall of the central rib assembly 51. The first locking bolt 23 allows the first connecting bushing 21 to be selectively fixed on the positioning shaft section 11. To further stabilize the fixation of the central rib assembly 51, the stepped surface where the adjusting shaft section 12 and the positioning shaft section 11 meet can abut against the central rib assembly 51 together with the first sliding bushing 2. To fix the outer main rib assembly 52, the second fixed bushing 32 can slide along the adjusting shaft section 12 to fit against the outer wall of the outer main rib assembly 52. ​​The second locking bolt 33 allows the second connecting bushing 31 to be selectively fixed on the adjusting shaft section 12. This allows the adjustable assembly shaft to be quickly and accurately adjusted in length and position, thus adapting to hydraulic support bases of different sizes. Furthermore, compared to existing assembly shafts with non-adjustable length dimensions, it is more convenient to store, reduces storage costs, and improves resource utilization.

[0051] To facilitate the disassembly and reinstallation of the adjustable assembly shaft, the first sliding bushing 2 is detachably connected to the positioning shaft section 11, and the second sliding bushing 3 is detachably connected to the adjusting shaft section 12. This makes the adjustable assembly shaft low in maintenance cost, highly replaceable, and easy to replace vulnerable parts, making it convenient for operators to maintain and replace during use.

[0052] Example 2

[0053] This embodiment is the same as embodiment 1 in the rest of the structure, except that, in order to facilitate the operator in moving the adjustable assembly shaft, and at the same time to prevent the second sliding bushing 3 from sliding out of the adjusting shaft section 12, as follows: Figure 8 As shown, a transport sleeve 4 is fitted onto one end of the adjusting shaft section 12. The transport sleeve 4 is fixedly connected to the adjusting shaft section 12, and the axes of the transport sleeve 4 and the adjusting shaft section 12 coincide. The transport sleeve 4 is cylindrical in shape. Furthermore, during the handling of the hydraulic support, collisions and scratches may occur, which could cause scratches or dents on the surface of the mounting shaft 1, thus affecting the accuracy and service life of the adjustable assembly shaft. The transport sleeve 4 can prevent the shaft from being mechanically damaged during equipment handling, installation, or maintenance.

[0054] In addition, to ensure the positional accuracy of the adjustable assembly shaft and reduce vibration and noise caused by installation errors or offsets during operation, the diameter of the adjustable shaft section 12 is equal to the length of the first fixed bushing 22. This not only eliminates the need to consider complex size matching issues, but also allows the operator to complete the bushing installation more quickly, reducing the possibility of human error.

[0055] In the description of this utility model, 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical connection; 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. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0057] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "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 the present invention. 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.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An adjustable assembly shaft for a hydraulic support base, characterized in that, It includes a mounting shaft (1), a first sliding bushing (2), and a second sliding bushing (3); The mounting shaft (1) includes a positioning shaft section (11) and an adjusting shaft section (12) arranged coaxially. The positioning shaft section (11) and the adjusting shaft section (12) are fixedly connected. The diameter of the positioning shaft section (11) is smaller than the diameter of the adjusting shaft section (12). The first sliding bushing (2) is slidably sleeved on the positioning shaft section (11) and detachably connected to the positioning shaft section (11). The second sliding bushing (3) is slidably sleeved on the adjusting shaft section (12) and detachably connected to the adjusting shaft section (12). The positioning shaft section (11) and the adjusting shaft section (12) can be respectively inserted into the central rib assembly (51) and the outer main rib assembly (52) of the hydraulic support base (5). The first sliding bushing (2) can slide along the positioning shaft section (11) to fit against the outer wall of the central rib assembly (51) and can be selectively fixed. The second sliding bushing (3) can slide along the adjusting shaft section (12) to fit against the outer wall of the outer main rib assembly (52) and can be selectively fixed.

2. The adjustable assembly shaft for a hydraulic support base as described in claim 1, characterized in that: The stepped surfaces of the adjusting shaft section (12) and the positioning shaft section (11) that are connected together can abut against the central rib assembly (51) together with the first sliding bushing (2).

3. The adjustable assembly shaft for a hydraulic support base as described in claim 1, characterized in that: The central rib assembly (51) has a waist-shaped mounting hole through which the positioning shaft segment (11) can pass; The first sliding bushing (2) includes a first connecting bushing (21) and a first fixed bushing (22) connected to each other; The first fixed bushing (22) is sleeved on the first connecting bushing (21), the first connecting bushing (21) and the first fixed bushing (22) have their axes coincident, and the two end faces of the first fixed bushing (22) are parallel and symmetrical chordal surfaces. When the first fixed bushing (22) is rotated relative to the positioning shaft segment (11) until its length direction is parallel to the length direction of the mounting hole on the central rib assembly (51), the first fixed bushing (22) can pass through the mounting hole; When the first fixed bushing (22) is rotated relative to the positioning shaft segment (11) until its length direction is perpendicular to the length direction of the mounting hole on the central rib assembly (51), the first fixed bushing (22) can fit against the outer wall of the central rib assembly (51).

4. The adjustable assembly shaft for a hydraulic support base as described in claim 3, characterized in that: The first sliding bushing (2) also includes at least one first locking bolt (23); The first connecting bushing (21) is provided with the first locking bolt (23), and the first connecting bushing (21) is provided with at least one first positioning hole. The first positioning hole is provided with a thread, and the first locking bolt (23) matches the thread of the first positioning hole. The first locking bolt (23) is connected to the surface of the positioning shaft segment (11) through the first positioning hole.

5. The adjustable assembly shaft for a hydraulic support base as described in claim 4, characterized in that: The outer main rib assembly (52) has a circular mounting hole through which the adjusting shaft section (12) can pass; The second sliding bushing (3) includes a second connecting bushing (31) and a second fixed bushing (32) connected to each other; The second fixed bushing (32) is sleeved on the second connecting bushing (31), and the axes of the second connecting bushing (31) and the second fixed bushing (32) coincide. The second connecting bushing (31) can be selectively fixed to the adjusting shaft section (12), and the second fixing bushing (32) can fit against the outer wall of the outer main rib assembly (52).

6. The adjustable assembly shaft for a hydraulic support base as described in claim 5, characterized in that: The second sliding bushing (3) also includes at least one second locking bolt (33); The second connecting bushing (31) is provided with the second locking bolt (33), and the second connecting bushing (31) is provided with at least one second positioning hole. The second positioning hole is provided with a thread, and the second locking bolt (33) matches the thread of the second positioning hole. The second locking bolt (33) is connected to the surface of the adjusting shaft section (12) through the second positioning hole.

7. The adjustable assembly shaft for a hydraulic support base as described in claim 6, characterized in that: At least one first groove is formed on the positioning shaft segment (11); The first groove is arranged along the axial direction of the positioning shaft section (11), and the first groove corresponds one-to-one with the first locking bolt (23). The first locking bolt (23) is connected to the bottom surface of the first groove through the first connecting bushing (21). At least one second groove is provided on the adjusting shaft section (12); The second groove is arranged along the axial direction of the adjusting shaft section (12), and the second groove corresponds one-to-one with the second locking bolt (33). The second locking bolt (33) is connected to the bottom surface of the second groove through the second connecting bushing (31).

8. The adjustable assembly shaft for a hydraulic support base as described in claim 7, characterized in that: The number of the first positioning hole, the second positioning hole, the first locking bolt (23), the second locking bolt (33), the first groove, and the second groove are all multiple; Multiple first positioning holes are evenly distributed along the axis of the first connecting bushing (21), and multiple first grooves are evenly distributed along the axis of the positioning shaft segment (11). Multiple second positioning holes are evenly distributed along the axis of the second connecting bushing (31), and multiple second grooves are evenly distributed along the axis of the adjusting shaft section (12).

9. The adjustable assembly shaft for a hydraulic support base as described in claim 1, characterized in that: One end of the adjusting shaft section (12) is fitted with a transport shaft sleeve (4), the transport shaft sleeve (4) is fixedly connected to the adjusting shaft section (12), and the axis of the transport shaft sleeve (4) coincides with that of the adjusting shaft section (12).

10. The adjustable assembly shaft for a hydraulic support base as described in claim 5, characterized in that: The positioning shaft section (11), adjusting shaft section (12), first connecting bushing (21), second connecting bushing (31) and second fixing bushing (32) are all cylindrical in shape.

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