Bucket arm sector seat positioning device and bucket arm positioning system

Abstract

The application relates to a bucket rod positioning technology field, and discloses a bucket rod sector seat positioning device and a bucket rod positioning system.The bucket rod sector seat positioning device comprises a first positioning assembly, a hinge hole positioning structure and a first driving mechanism, the hinge hole positioning structure comprises a hinge hole plug-in part, and the first driving mechanism is used for driving the hinge hole positioning structure to move so that the hinge hole plug-in part is plugged into a hinge hole of a bucket rod sector seat; a second positioning assembly, a weld joint positioning structure and a second driving mechanism, the weld joint positioning structure comprises a clamping structure capable of being matched with a sector outer contour of the bucket rod sector seat, and the second driving mechanism is used for driving the weld joint positioning structure to move so that the clamping structure is clamped in a spliced weld joint of the bucket rod sector seat and a bucket rod side plate. The bucket rod sector seat positioning device and the bucket rod positioning system can guarantee the consistency and uniformity of a spliced gap between the bucket rod sector seat and the bucket rod side plate, and are favorable for improving the quality of the bucket rod product.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of excavator arm positioning, and particularly relates to an arm sector positioning device and an arm positioning system. BACKGROUND

[0002] The arm of an excavator is an important component connecting a bucket and a boom, as shown in FIG. 1, which is mainly composed of a side plate assembly, a sector seat and an ear plate seat. In the production process of the arm, the uniformity of the butt joint gap when the sector seat is butt welded with the side plate directly affects the production quality of the arm, and therefore the positioning accuracy of the sector seat is crucial. If the sector seat is positioned by pins only by manual work, the gap between the sector seat and the side plate will be uneven, and a large amount of manpower and time will be consumed, resulting in low production efficiency. Therefore, it is urgent to provide an efficient positioning device. Figure 6 SUMMARY

[0003] In view of at least one of the above defects or deficiencies of the prior art, the application provides an arm sector positioning device and an arm positioning system, which can ensure the consistency and uniformity of the butt joint gap between the arm sector and the arm side plate, improve the welding quality, save labor cost and improve production efficiency.

[0004] To achieve the above-mentioned purpose, the application provides an arm sector positioning device in one aspect, comprising:

[0005] a first positioning assembly comprising a hinge hole positioning structure and a first driving mechanism, the hinge hole positioning structure comprising a hinge hole plug-in part, and the first driving mechanism being used to drive the hinge hole positioning structure to move so that the hinge hole plug-in part is plugged into a hinge hole of the arm sector; and

[0006] a second positioning assembly comprising a weld joint positioning structure and a second driving mechanism, the weld joint positioning structure comprising a clamping structure capable of being arranged to match the sector outer contour of the arm sector, and the second driving mechanism being used to drive the weld joint positioning structure to move so that the clamping structure is clamped in the butt joint of the arm sector and the arm side plate.

[0007] In some embodiments, the weld joint positioning structure comprises a positioning plate, the clamping structure is arranged on the positioning plate and comprises a plurality of clamping module assemblies arranged in sequence and at intervals, the connecting lines between the plurality of clamping module assemblies are arranged to match the sector outer contour of the arm sector, and the clamping module assembly comprises a top surface and a bottom surface respectively used to abut the welding surface of the arm sector and the welding surface of the arm side plate.

[0008] ​In some embodiments, the reaming positioning structure comprises a guide positioning shaft and a positioning joint connected at an end of the guide positioning shaft, the positioning joint is formed as the reaming insertion part, the arm sector seat positioning device comprises a movable mounting seat, the movable mounting seat is provided with a guide sleeve part, the guide positioning shaft is movably inserted into the guide sleeve part in an axial direction, and the first driving mechanism is in driving connection with the guide positioning shaft.

[0009] In some embodiments, one end of the guide positioning shaft is connected with the positioning joint, and an outer peripheral wall of the other end is provided with a radial direction extending stop part, and the arm sector seat positioning device comprises a limiting block detachably connected to an end face of the guide sleeve part for abutting against the stop part.

[0010] In some embodiments, the first driving mechanism is formed as a first telescopic mechanism, the first telescopic mechanism comprises a first cylinder part and a first telescopic rod movably inserted into the first cylinder part, the movable mounting seat is provided with a first support structure, the first cylinder part is fixedly connected to the first support structure, and the first telescopic rod is in driving connection with an end of the guide positioning shaft.

[0011] In some embodiments, the welding seam positioning structure comprises a positioning plate movably sleeved on the guide positioning shaft, and the clamping structure is arranged on the positioning plate.

[0012] In some embodiments, the second driving mechanism is formed as a second telescopic mechanism, the second telescopic mechanism comprises a second cylinder part and a second telescopic rod movably inserted into the second cylinder part, the movable mounting seat is provided with a second support structure, the second cylinder part is fixedly connected to the second support structure, and the second telescopic rod is fixedly connected to the positioning plate.

[0013] In some embodiments, the arm sector seat positioning device comprises a lifting driving mechanism for driving lifting adjustment of the movable mounting seat.

[0014] In some embodiments, the arm sector seat positioning device further comprises a support frame and a height limiting column with adjustable height, the support frame comprises an upper limiting cover and a lower limiting table arranged in an upper and lower interval, the lifting driving mechanism is arranged between the upper limiting cover and the lower limiting table, the height limiting column is arranged on one of the upper limiting cover and the lower limiting table in a vertical direction, and the lifting driving mechanism can drive the movable mounting seat to move up and down to abut against a limiting end of the height limiting column.

[0015] The second aspect of the present application provides an arm positioning system, which comprises the above-mentioned arm sector seat positioning device.

[0016] By the technical scheme, when the bucket arm sector positioning device is used to position the bucket arm sector, first, the hinge hole positioning structure is driven by the first driving mechanism to move towards the bucket arm sector, so that the hinge hole plug-in part is plugged into the hinge hole of the bucket arm sector, thereby completing the rough positioning of the bucket arm sector, then the welding seam positioning structure is driven by the second driving mechanism to move towards the bucket arm sector until the clamping structure is clamped in the spliced welding seam between the bucket arm sector and the bucket arm side plate, since the clamping structure has a shape similar to the sector outer contour of the bucket arm sector and has a uniform thickness, the spliced welding seam spacing between the bucket arm sector and the bucket arm side plate is ensured to be uniform, which has a very high uniformity, thereby effectively improving the welding quality, at the same time, the entire positioning process has a high degree of automation, and manual plug pin positioning is not required, thereby greatly improving the production efficiency of the bucket arm and reducing the labor cost.

[0017] Other features and advantages of the embodiments of the present application will be described in detail in the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0018] 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 to explain the embodiments of the present application together with the following detailed description, but do not limit the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor. In the drawings:

[0019] Figure 1 FIG. 1 is a schematic view of a bucket arm sector positioning device according to an embodiment of the present application;

[0020] Figure 2 FIG. 2 is a sectional view A-A of the bucket arm sector positioning device of FIG. 1; Figure 1

[0021] Figure 3 FIG. 3 is a schematic view of another side of the bucket arm sector positioning device of FIG. 1; Figure 1

[0022] Figure 4 FIG. 4 is a sectional view B-B of the bucket arm sector positioning device of FIG. 1; Figure 3

[0023] Figure 5 FIG. 5 is a schematic view of a movable mounting seat in the bucket arm sector positioning device of FIG. 1; Figure 1

[0024] Figure 6 FIG. 6 is a schematic view of an excavator bucket arm in the prior art.

[0025] REFERENCE NUMERALS

[0026] ​​​​1 hinge positioning structure 101 guide positioning shaft

[0027] 1011 stop 102 positioning joint

[0028] 2 first driving mechanism 201 first cylinder part

[0029] 202 first telescopic rod 3 weld positioning structure

[0030] 301 positioning plate 302 clamping module assembly

[0031] 3021 clamping die 3022 adjustable connecting block

[0032] 4 second driving mechanism 401 second cylinder part

[0033] 402 second telescopic rod 5 movable mounting seat

[0034] 501 guide sleeve part 502 first support structure

[0035] 503 second support structure 6 limiting block

[0036] 7 lifting driving mechanism 701 upper bearing

[0037] 702 lower bearing 703 lead screw

[0038] 704 nut 705 guide rail

[0039] 706 sliding block 707 hand wheel

[0040] 8 support frame 801 upper limiting cover

[0041] 802 lower limiting table 9 height limiting column

[0042] 10 bucket lever sector seat 11 bucket lever side plate DETAILED DESCRIPTION

[0043] 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 only used to illustrate and explain the present application, and are not used to limit the present application.

[0044] The present application will be described in detail below with reference to the accompanying drawings and in combination with exemplary embodiments.

[0045] As Figures 1 to 6As shown, the first exemplary embodiment of the present application provides a boom sector positioning device, which comprises a first positioning assembly and a second positioning assembly. The first positioning assembly comprises a hinge hole positioning structure 1 and a first driving mechanism 2. The hinge hole positioning structure 1 comprises a hinge hole plug-in part. The first driving mechanism 2 is used to drive the hinge hole positioning structure 1 to move so that the hinge hole plug-in part can be plugged into the hinge hole of the boom sector 10. The second positioning assembly comprises a weld seam positioning structure 3 and a second driving mechanism 4. The weld seam positioning structure 3 comprises a clamping structure which can be placed to match the sector outer contour of the boom sector 10. The second driving mechanism is used to drive the weld seam positioning structure 3 to move so that the clamping structure can be clamped in the joint weld between the boom sector and the boom side plate 11.

[0046] Therefore, when the boom sector positioning device of the present exemplary embodiment is used to position the boom sector 10, the first driving mechanism 2 is first used to drive the hinge hole positioning structure 1 to move towards the boom sector 10 until the hinge hole plug-in part of the hinge hole positioning structure 1 is plugged into the hinge hole of the boom sector 10, thereby completing the rough positioning of the boom sector 10. Then, the second driving mechanism 4 is used to drive the weld seam positioning structure 3 to move towards the boom sector 10 until the clamping structure of the weld seam positioning structure 3 is clamped in the joint weld between the boom sector 10 and the boom side plate 11. Due to the shape of the clamping structure which is similar to the sector outer contour of the boom sector 10 and the uniform thickness of the clamping structure, the joint weld spacing between the boom sector 10 and the boom side plate 11 is consistent and has a very high uniformity, thereby effectively improving the welding quality of the boom sector 10. At the same time, the entire positioning process of the boom sector 10 is highly automated and does not require manual pin positioning, thereby greatly improving the production efficiency of the boom and reducing labor costs.

[0047] In an alternative or preferred embodiment, the welding seam positioning structure 3 comprises a positioning plate 301, and the clamping structure is arranged on the positioning plate 301, specifically, the clamping structure comprises a plurality of clamping module assemblies 302 arranged in sequence and at intervals, and the connecting lines between the plurality of clamping module assemblies 302 match the outer contour of the bucket arm sector seat. The clamping module assembly 302 comprises a clamping die 3021, and the top surface and the bottom surface of the clamping die 3021 are respectively used for abutting the welding surfaces of the bucket arm sector seat and the bucket arm side plate. The clamping die 3021 can be installed on the positioning plate 301 in cooperation with an internal thread cylindrical pin and an internal hexagonal screw. Further, the clamping module assembly 302 further comprises an adjustable connecting block 3022, the adjustable connecting block 3022 can be installed between the clamping die 3021 and the positioning plate 301, and a gasket for buffering can be arranged between the adjustable connecting block 3022 and the positioning plate 301, and the position of the clamping die 3021 relative to the positioning plate 301 can be finely adjusted by increasing or decreasing the gasket, so as to adapt to the positioning requirements of bucket arm sector seats 10 of different sizes. The specific structure and shape of the positioning plate 301 are not limited in the present application, for example, the positioning plate 301 can be a sector positioning plate as shown in the drawings, or can be arranged in a rectangular, circular or other shape, as long as the arrangement and installation of the plurality of clamping module assemblies 302 can be met. Preferably, the positioning plate 301 is arranged as a sector positioning plate, and the outer contour of the positioning plate 301 is similar to the outer contour of the bucket arm sector seat, as shown in Figure 1 , the plurality of clamping module assemblies 302 are arranged in sequence and at intervals on the outer edge of the positioning plate 301.

[0048] In other embodiments, the clamping structure can also be a clamping strip arranged in extension matching the outer contour of the bucket arm sector seat 10, and the length of the clamping strip can be longer than that of the clamping die 3021, so that the clamping strip can be clamped in the joint welding seam between the bucket arm sector seat 10 and the bucket arm side plate 11. It should be noted that the specific structure of the clamping structure is not limited in the present application, as long as the clamping structure can be adaptively limited and clamped in the joint welding seam.

[0049] In an alternative or preferred embodiment, as shown in Figure 2 , the reaming positioning structure 1 comprises a guide positioning shaft 101 and a positioning connector 102 connected to the end of the guide positioning shaft 101, and the positioning connector 102 is formed as the above-mentioned reaming plug-in part and can be plugged into the reaming hole of the bucket arm sector seat 10. Specifically, the positioning connector 102 can be connected to the end of the guide positioning shaft 101 in small gap cooperation through the groove structure on the positioning connector 102 and the boss structure on the end of the guide positioning shaft 101, and the positioning connector 102 and the guide positioning shaft 101 are locked by an internal hexagonal screw. Thus, the positioning connector 102 of the present exemplary embodiment can be supported for disassembly and replacement, and has higher flexibility and adaptability. Meanwhile, the bucket arm sector seat positioning device further comprises a movable mounting seat 5, as shown in Figure 5As shown, the movable mounting seat 5 is provided with a guide sleeve part 501, and the guide positioning shaft 101 is movably inserted into the guide sleeve part 501 in the axial direction. For example, a copper-based graphite sleeve with lubricating effect can be arranged between the guide positioning shaft 101 and the guide sleeve part 501 to improve the sliding smoothness of the guide positioning shaft 101. The first driving mechanism 2 is in transmission connection with the guide positioning shaft 101, so as to drive the guide positioning shaft 101 to move along the guide sleeve part 501, and drive the positioning connector 102 to be inserted into the hinge hole of the arm bucket sector seat 10.

[0050] In an alternative or preferred embodiment, one end of the guide positioning shaft 101 is connected with the positioning connector 102, and the outer peripheral wall of the other end is provided with a radial extending stop part 1011, as shown in Figure 3 As shown, the arm bucket sector positioning device includes a limiting block 6 which is detachably connected to the end face of the guide sleeve part 501 for abutting against the stop part 1011. Thus, by replacing limiting blocks 6 with different thicknesses or increasing or decreasing the number of limiting blocks 6, the length of the part of the guide positioning shaft 101 extending out of the guide sleeve part 501 can be controlled, so that the positioning connector 102 can be inserted into the hinge hole of the arm bucket sector seat 10 with an appropriate depth.

[0051] In an alternative or preferred embodiment, as shown in Figure 2 and Figure 5 As shown, the first driving mechanism 2 is formed as a first telescopic mechanism, the first telescopic mechanism includes a first cylinder part 201 and a first telescopic rod 202 movably inserted into the first cylinder part 201, the movable mounting seat 5 is provided with a first support structure 502, the first cylinder part 201 is fixedly connected to the first support structure 502, and the first telescopic rod 202 is in transmission connection with the end of the guide positioning shaft 101.

[0052] In the embodiment shown in the drawings, the first telescopic rod 202 is in transmission connection with the other end of the guide positioning shaft 101 opposite to the positioning connector 102. When the first telescopic rod 202 is retracted into the first cylinder part 201, the guide positioning shaft 101 can be driven to extend out of the guide sleeve part 501, so as to drive the positioning connector 102 to move towards the arm bucket sector seat 10. Conversely, when the first telescopic rod 202 extends out of the first cylinder part 201, the guide positioning shaft 101 can be driven to retract into the guide sleeve part 501, so as to drive the positioning connector 102 to move away from the arm bucket sector seat 10. Of course, in other embodiments, the first telescopic mechanism can be reversely arranged, so that the guide positioning shaft 101 is driven to extend out of the guide sleeve part 501 when the first telescopic rod 202 extends out of the first cylinder part 201, and the guide positioning shaft 101 is driven to retract into the guide sleeve part 501 when the first telescopic rod 202 is retracted into the first cylinder part 201. The present application does not limit the arrangement direction of the first telescopic mechanism and the connection mode with the guide positioning shaft 101.

[0053] In an alternative or preferred embodiment, as shown in Figure 2 The positioning plate 301 is movably sleeved on the guide positioning shaft 101 in an axial direction, for example, a copper-based graphite sleeve with lubricating effect can be arranged between the positioning plate 301 and the guide positioning shaft 101, so as to ensure the smoothness of the sliding of the positioning plate 301. Thus, under the driving of the second driving mechanism 4, the weld positioning structure 3 can be moved towards the arm flange 10 under the guidance of the guide positioning shaft 101, so as to realize the clamping of the clamping structure in the splice weld between the arm flange 10 and the arm side plate 11. Under the support of the guide positioning shaft 101, the movement stability of the weld positioning structure 3 is better, so as to improve the accuracy of the positioning of the clamping structure, and the guide positioning shaft 101 is ingeniously used as the guide structure of the weld positioning structure 3, without the need to additionally arrange other guide structures, so as to simplify the overall structure of the arm flange positioning device and reduce the manufacturing cost.

[0054] Further, the second driving mechanism 4 is formed as a second telescopic mechanism, which includes a second cylinder portion 401 and a second telescopic rod 402 telescopically movably inserted into the second cylinder portion 401, and the movable mounting seat 5 is provided with a second support structure 503, the second cylinder portion 401 is fixedly connected to the second support structure 503, and the second telescopic rod 402 is fixedly connected to the positioning plate 301.

[0055] In the embodiment shown in the drawings, when the second telescopic rod 402 is extended out of the second cylinder portion 401, the positioning plate 301 can be driven to move away from the movable mounting seat 5, so as to drive the clamping die 3021 to move towards the arm flange 10; on the contrary, when the second telescopic rod 402 is retracted into the second cylinder portion 401, the positioning plate 301 can be driven to move towards the movable mounting seat 5, so as to drive the clamping die 3021 to move away from the arm flange 10. Of course, in other embodiments, the second telescopic mechanism can be reversely arranged, so that the positioning plate 301 is driven to move towards the movable mounting seat 5 when the second telescopic rod 402 is extended out of the second cylinder portion 401, and the positioning plate 301 is driven to move away from the movable mounting seat 5 when the second telescopic rod 402 is retracted into the second cylinder portion 401. The arrangement direction of the second telescopic mechanism and the connection mode with the positioning plate 301 are not limited in the present application.

[0056] In an alternative or preferred embodiment, the arm flange positioning device includes a lifting driving mechanism 7 for driving the movable mounting seat 5 to lift and adjust. Specifically, the lifting driving mechanism 7 can be a lead screw driving mechanism, a telescopic driving mechanism, etc. The present embodiment takes the lead screw driving mechanism as an example, as shown in Figure 4As shown, it comprises an upper bearing 701, a lower bearing 702, a screw rod 703, a nut 704, a guide rail 705, a sliding block 706 and a hand wheel 707. The upper bearing 701 and the lower bearing 702 are respectively installed on the upper limiting cover 801 and the lower limiting table 802 of the support frame 8 through bearing mounting seats, the screw rod 703 is installed in the upper bearing 701 and the lower bearing 702 through interference fit, the nut 704 is connected with the screw rod 703 through screw fit, the nut 704 can be installed in the nut fixing seat through interference fit, the nut fixing seat is fixedly connected to the movable mounting seat 5 through bolt and washer fit, the guide rail 705 is arranged on the support frame 8 in vertical extension, the sliding block 706 is slidingly connected with the guide rail 705 and is fixedly connected with the movable mounting seat 5, and the hand wheel 707 is installed on the screw rod 703 through a flat key. Thus, the screw rod 703 can be driven to rotate by rotating the hand wheel 707, so that the nut 704 moves along the axial direction of the screw rod 703, the nut 704 is fixedly connected with the movable mounting seat 5 through the nut fixing seat, the movable mounting seat 5 is fixedly connected with the sliding block 706, and thus the nut 704 can drive the movable mounting seat 5 to slide along the guide rail 705 when the nut 704 moves along the axial direction of the screw rod 703, so as to achieve the effect of lifting movement. Since the first positioning assembly and the second positioning assembly are both installed on the movable mounting seat 5, the first positioning assembly and the second positioning assembly can be adjusted in lifting.

[0057] In an alternative or preferred embodiment, the boom sector positioning device further comprises a support frame 8 and a height adjustable height limiting column 9, the support frame 8 comprises an upper limiting cover 801 and a lower limiting base 802 arranged in a spaced apart manner, the lifting driving mechanism 7 is arranged between the upper limiting cover 801 and the lower limiting base 802, and the height limiting column 9 is arranged on one of the upper limiting cover 801 and the lower limiting base 802 in a vertical direction, and the lifting driving mechanism 7 can drive the movable mounting seat 5 to move up and down to abut against the limiting end of the height limiting column 9, in other words, when the movable mounting seat 5 abuts against the height limiting column 9 during the lifting adjustment of the movable mounting seat 5 driven by the lifting driving mechanism 7, it can be confirmed that the movable mounting seat 5 at this time reaches the preset height, so as to improve the positioning accuracy. Specifically, in the present exemplary embodiment, the height limiting column 9 can be inserted into the upper limiting cover 801 or the lower limiting base 802 through a small gap fit, and the limiting end of the height limiting column 9 can be provided with a gasket, or a gasket can be arranged on the end face of the movable mounting seat 5 to prevent damage when the movable mounting seat 5 contacts the height limiting column 9. As shown in the drawings, when the height limiting column 9 is arranged on the lower limiting base 802, when the movable mounting seat 5 is lowered to abut against the height limiting column 9, it can be considered that the movable mounting seat 5 has reached the preset height. In other embodiments, when the height limiting column 9 is arranged on the upper limiting cover 801, when the movable mounting seat 5 is raised to abut against the height limiting column 9, it can be considered that the movable mounting seat 5 has reached the preset height. The present application does not limit the installation position of the height limiting column 9, as long as the height adjustment requirement can be met. Of course, when the height limiting column 9 is arranged on the lower limiting base 802, the height limiting column 9 can support the movable mounting seat 5, thereby improving the stability of the movable mounting seat 5.

[0058] The second exemplary embodiment of the present application provides a boom positioning system, which comprises the above-mentioned boom sector positioning device. Obviously, the boom positioning system of the present exemplary embodiment has all the technical effects brought by the above-mentioned boom positioning system, and is not limited herein.

[0059] In the description of the present application, it should be understood that the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0060] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0061] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, 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, those skilled in the art can combine and combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.

[0062] 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 limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A positioning device for a bucket arm sector seat, characterized in that, The application relates to a positioning device for a bucket arm sector seat, which comprises a first positioning assembly and a second positioning assembly. The first positioning assembly comprises a hinge hole positioning structure (1) and a first driving mechanism (2), the hinge hole positioning structure (1) comprises a hinge hole plug-in part, and the first driving mechanism (2) is used for driving the hinge hole positioning structure (1) to move so that the hinge hole plug-in part is plugged into a hinge hole of a bucket arm sector seat. The second positioning assembly comprises a welding seam positioning structure (3) and a second driving mechanism (4), the welding seam positioning structure (3) comprises a clamping structure which can be arranged to match the sector outer contour of the bucket arm sector seat, and the second driving mechanism is used for driving the welding seam positioning structure (3) to move so that the clamping structure is clamped in a splicing welding seam between the bucket arm sector seat and a bucket arm side plate. The welding seam positioning structure (3) comprises a positioning plate (301), the clamping structure is arranged on the positioning plate (301) and comprises a plurality of clamping die assemblies (302) which are arranged in sequence and at intervals, the connecting lines between the clamping die assemblies (302) are arranged to match the sector outer contour of the bucket arm sector seat, and the clamping die assembly (302) comprises a top surface and a bottom surface which are respectively used for abutting the welding surfaces of the bucket arm sector seat and the bucket arm side plate. The hinge hole positioning structure (1) comprises a guide positioning shaft (101) and a positioning connector (102) which is connected to the end of the guide positioning shaft (101), the positioning connector (102) is formed as the hinge hole plug-in part, the bucket arm sector seat positioning device comprises a movable mounting seat (5), the movable mounting seat (5) is provided with a guide sleeve part (501), the guide positioning shaft (101) is movably inserted into the guide sleeve part (501) in the axial direction, and the first driving mechanism (2) is in transmission connection with the guide positioning shaft (101).

2. The arm segment segment positioning device of claim 1, wherein, One end of the guide positioning shaft (101) is connected to the positioning connector (102), and the outer peripheral wall of the other end is provided with a radial extending stop part (1011), the bucket arm sector seat positioning device comprises a limiting block (6) which is detachably connected to the end face of the guide sleeve part (501) and is used for abutting the stop part (1011).

3. The arm segment segment positioning device of claim 2, wherein, The first driving mechanism (2) is formed as a first telescopic mechanism, the first telescopic mechanism comprises a first cylinder part (201) and a first telescopic rod (202) which is movably inserted into the first cylinder part (201), the movable mounting seat (5) is provided with a first supporting structure (502), the first cylinder part (201) is fixedly connected to the first supporting structure (502), and the first telescopic rod (202) is in transmission connection with the end of the guide positioning shaft (101).

4. The arm segment segment positioning device of claim 2, wherein, The welding seam positioning structure (3) comprises a positioning plate (301) which is movably sleeved on the guide positioning shaft (101), and the clamping structure is arranged on the positioning plate (301).

5. The arm segment segment positioning device of claim 2, wherein, ​ 6. The arm segment segment positioning device of claim 5, wherein, The second driving mechanism (4) is formed as a second telescopic mechanism, which comprises a second cylinder portion (401) and a second telescopic rod (402) telescopically movably inserted into the second cylinder portion (401), and the movable mounting seat (5) is provided with a second support structure (503), the second cylinder portion (401) is fixedly connected to the second support structure (503), and the second telescopic rod (402) is fixedly connected to the positioning plate (301).

7. The arm segment segment positioning device of claim 2, wherein, The arm bucket sector positioning device comprises a lifting driving mechanism (7) for driving the movable mounting seat (5) to be adjusted in lifting.

8. The arm segment segment positioning device of claim 7, wherein, The arm bucket sector positioning device further comprises a support frame (8) and a height-limiting column (9) with adjustable height, the support frame (8) comprises an upper limiting cover (801) and a lower limiting table (802) arranged in an upper-lower interval, the lifting driving mechanism (7) is arranged between the upper limiting cover (801) and the lower limiting table (802), the height-limiting column (9) is arranged on one of the upper limiting cover (801) and the lower limiting table (802) in a vertical direction, and the lifting driving mechanism (7) can drive the movable mounting seat (5) to move up and down to abut against a limiting end of the height-limiting column (9).

9. A boom positioning system characterized by, The arm bucket positioning system comprises the arm bucket sector positioning device according to any one of claims 1 to 8.

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