Suspension arm assembling and positioning device

Abstract

The utility model relates to the technical field of lazy arm machining, and discloses a lazy arm assembling and positioning device which is used for positioning parts of a lazy arm in the lazy arm assembling process and comprises a working platform, a supporting frame assembly and a first positioning assembly, and the supporting frame assembly and the first positioning assembly are arranged on the working platform. The first positioning assembly is used for fixing and positioning a second part of the suspension arm, and the supporting frame assembly comprises an adjusting frame and a movement control assembly movably connected with the adjusting frame. The movement control assembly is used for fixing a first component of the suspension arm and adjusting the relative position of the first component and the second component. According to the suspension arm assembling and positioning device, positioning and adjusting of parts of the suspension arm are achieved, and the machining precision, the welding efficiency and the production efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boom processing, in particular to a boom assembly positioning device. BACKGROUND

[0002] The boom type lifting or hoisting device is a special machine equipped with a boom structure, and the telescopic boom is driven by an external oil cylinder. The device can efficiently complete the transfer of goods and personnel, greatly improve the transportation efficiency, reduce the transportation cost, reduce the labor intensity, and ensure the safety of operation. Due to its excellent performance, it is widely used in transportation, civil construction, power, telecommunications and other fields, especially in high-altitude operation, rescue, port cargo handling and long-distance transfer of goods, and plays an important role.

[0003] The boom type boom structure is composed of three parts of a boom body cylinder, a boom head assembly and a boom tail assembly. The boom tail assembly is provided with a shaft sleeve structure, and the oil cylinder mounting plate for fixing the oil cylinder is arranged on the shaft sleeve structure. The oil cylinder body is mounted on the oil cylinder mounting plate of the boom structure, and the telescopic rod of the oil cylinder is connected to the inside of the boom structure to push each section of the boom to realize the extension and retraction of the boom one by one. The mounting surface of the oil cylinder mounting plate must be perpendicular to the center surface of the cylinder and perpendicular to the lower surface of the cylinder, so that the relative movement of the nested booms can be kept parallel and not interfered. At present, during the assembly process of the boom structure, the machining amount of the oil cylinder mounting plate is small, the size accuracy is high, and the important parts of the boom are positioned and welded. When there is no positioning tool, the manual operation process cannot control the accuracy of the manual operation process, the oil cylinder mounting plate is prone to deformation, and manual operation has errors, which cannot guarantee that the machining after welding can scrape all the mounting surfaces of the oil cylinder mounting plate, which will cause the perpendicularity deviation of the oil cylinder mounting plate relative to the bottom of the cylinder, resulting in interference between the boom and the oil cylinder during the extension of the boom. The welding efficiency and production efficiency are low, which seriously limits the improvement of production capacity. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above problems, the utility model provides a boom assembly positioning device which can position and adjust the parts of the boom, improve the machining precision, welding efficiency and production efficiency, and meet the mass production demand.

[0005] The utility model provides a boom assembly positioning device for positioning the parts of the boom during the assembly process of the boom, which comprises a working platform, a supporting frame assembly and a first positioning assembly installed on the working platform, the first positioning assembly is used for fixing and positioning the second part of the boom, the supporting frame assembly comprises an adjusting frame and a movable control assembly movably connected with the adjusting frame, the movable control assembly is used for fixing the first part of the boom and adjusting the relative position of the first part and the second part.

[0006] In an embodiment, the working platform is provided with a first alignment structure for aligning the placement position of the boom.

[0007] In an embodiment, the support frame assembly comprises a cross beam, a longitudinal beam and a base, the cross beam is fixedly connected with the longitudinal beam, the longitudinal beam is fixedly connected with the base, the base is fixedly connected with the working platform, the adjusting frame is arranged on the longitudinal beam and below the cross beam.

[0008] In an embodiment, the support frame assembly further comprises a plurality of second positioning assemblies arranged on the cross beam for positioning the boom, the second positioning assembly comprises a first positioning plate arranged on the cross beam, and a plurality of positioning columns with different lengths are arranged on the first positioning plate.

[0009] In an embodiment, the support frame assembly further comprises a plurality of adjusting frame mounting plates arranged on the longitudinal beam, the adjusting frame mounting plate is provided with a through hole for the adjusting frame to pass through, and the adjusting frame and the adjusting frame mounting plate are detachably connected.

[0010] In an embodiment, a second alignment structure is arranged at the midpoint of the cross beam, and the second alignment structure is used for aligning the placement position of the boom.

[0011] In an embodiment, the movement control assembly comprises a movement ring for the adjusting frame to pass through, a second positioning plate for positioning the first component, and a handle, the movement ring is arranged at one end of the movement control assembly, the second positioning plate is arranged at the other end of the movement control assembly, and the movement control assembly is movably connected with the adjusting frame through the movement ring.

[0012] In an embodiment, the movement control assembly further comprises a fixing assembly arranged on the second positioning plate, the fixing assembly comprises a pressing plate arranged on the second positioning plate and a locking piece arranged on the pressing plate.

[0013] In an embodiment, the first positioning assembly comprises:

[0014] at least one first positioning piece for supporting and positioning the second component in the height direction, the first positioning piece is arranged on the working platform and above the first alignment structure;

[0015] and a plurality of second positioning pieces arranged on the working platform and sequentially arranged in pairs along the first alignment structure, the second positioning piece is used for fixing the second component in the width direction, and the second positioning piece is assembled or welded on the working platform.

[0016] In an embodiment, two first positioning members are provided, two groups of pairs of second positioning members are provided, one group of pairs of second positioning members is arranged at a position close to the support frame assembly, another group of pairs of second positioning members is arranged at another end of the working platform away from the support frame assembly, and the two first positioning members are respectively arranged at one side of the two groups of pairs of second positioning members close to the support frame assembly.

[0017] In an embodiment, the first positioning member is adjustable in height direction.

[0018] In an embodiment, the distance between the pairs of second positioning members is adjustable, and each side of the pairs of second positioning members facing each other is provided with a clamping block.

[0019] The utility model has the advantages that: the first positioning assembly and the movement control assembly are used for respectively fixing and positioning the first part and the second part of the boom, the movement control assembly adjusts the relative position of the first part and the second part, the positioning accuracy is ensured, the positioning and welding are better, the machining precision of the parts of the boom and the positioning and welding efficiency are improved, the production efficiency is improved, and the production capacity is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as limiting the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0021] Figure 1 It is an embodiment of the utility model's boom assembly positioning device's structural schematic diagram.

[0022] Figure 2 It is an embodiment of the utility model's boom assembly positioning device's structural schematic diagram. Figure 1 It is an embodiment of the utility model's boom assembly positioning device's structural schematic diagram.

[0023] Figure 3 It is an embodiment of the utility model's boom assembly positioning device's structural schematic diagram.

[0024] Figure 4 It is an embodiment of the utility model's boom assembly positioning device's structural schematic diagram.

[0025] Figure 5 It is an embodiment of the utility model's boom assembly positioning device's structural schematic diagram.

[0026] Figure 6 It is an embodiment of the utility model's boom assembly positioning device's structural schematic diagram. DETAILED DESCRIPTION

[0027] The specific embodiments of the present application will be described in detail in the following with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the description of the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0028] In the description of the present application, unless otherwise explicitly specified and limited, the terms "arrange", "mount", "connect" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0029] The terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly placed when the product of the present application is used, and are only for the convenience of description and simplification of description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0030] The terms "first", "second", "third" and the like are only for distinguishing similar attributes of elements, and do not indicate or imply relative importance or a particular order.

[0031] The terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, in addition to including the listed elements, other elements not explicitly listed can also be included.

[0032] Please refer to Figures 1-6 It shows a boom assembly positioning device provided in the embodiment of the present application, which is used for positioning the parts of the boom 6 in the assembly process of the boom 6. The boom assembly positioning device comprises a working platform 1, a support frame assembly 2 and a first positioning assembly 3 installed on the working platform 1. The first positioning assembly 3 is used for fixedly positioning a second part 62 of the boom 6. The support frame assembly 2 comprises an adjusting frame 4 and a movement control assembly 5 movably connected with the adjusting frame 4. The movement control assembly 5 is used for fixing a first part 61 of the boom 6 and adjusting the relative position of the first part 61 and the second part 62.

[0033] As Figure 6As shown, the boom 6 includes a first component 61, a second component 62, and a bushing assembly. The first component 61 is a cylinder mounting plate, the second component 62 is the boom cylinder, and the bushing assembly is fixedly sleeved on the tail end of the boom cylinder. The cylinder mounting plate includes a first cylinder mounting plate 61 and a second cylinder mounting plate 61, which are respectively disposed at both ends of the bushing assembly in the width direction.

[0034] In one embodiment, the first positioning component 3 is set to one, the support frame component 2 is set at one end of the working platform 1, and the first positioning component 3 is set at the other end of the working platform 1. The boom 6 can be positioned and fixed at both ends by the movement control component 5 and the first positioning component 3.

[0035] like Figures 1-2 and Figure 5 As shown, in one embodiment, at least two first positioning components 3 are provided, and the at least two first positioning components 3 are spaced apart along the length direction of the working platform 1, so as to position different parts of the boom cylinder 62 in the length direction and ensure the positioning accuracy of the boom cylinder 62.

[0036] In one embodiment, the adjustment frame 4 consists of at least one core rod, and the number of core rods can be increased according to the load-bearing capacity requirements to enhance the stability and load-bearing capacity of the adjustment frame 4. Figure 2 As shown, in this embodiment, the adjustment frame 4 consists of two mandrels, and the movement control component 5 can move freely left and right on the two mandrels. The adjustment frame 4 consisting of two mandrels and the movement control component 5 work together to ensure that the end face of the movement control component 5 is relatively perpendicular to the surface of the work platform 1.

[0037] like Figure 2 and Figures 5-6 As shown, in one embodiment, two movement control components 5 are provided, which are respectively fixed to the first cylinder mounting plate 61 and the second cylinder mounting plate 61. Simultaneously, the positions of the first and second cylinder mounting plates 61 relative to the boom cylinder 62 can be adjusted to ensure the positioning accuracy of the first and second cylinder mounting plates 61. Through the movable connection between the movement control components 5 and the adjusting frame 4, the movement control components 5 can easily adjust their position left and right according to the distance between the first and second cylinder mounting plates 61.

[0038] The first and second cylinder mounting plates 61 are fixed by the motion control component 5, and the first positioning component 3 is fixed and positioned to adjust the position of the first and second cylinder mounting plates 61 relative to the boom cylinder 62. This ensures the positioning accuracy of the boom, which facilitates better positioning and welding, improves the component processing accuracy and positioning and welding efficiency of the boom, thereby increasing production efficiency and capacity.

[0039] In one embodiment, the work platform 1 is provided with a first alignment structure M for calibrating the placement position of the boom 6.

[0040] The first alignment structure M can be a straight line structure with protrusions or depressions set along the length of the working platform 1, or a point structure set continuously or at intervals, or a center line marked along the length of the working platform 1. As long as it can achieve the placement of the calibrated boom 6, there are no restrictions.

[0041] like Figures 1-2 and Figure 5 As shown, in this embodiment, the first alignment structure M is a first center line marked on the length direction of the working platform 1. A center line is also marked on the boom cylinder 62. When placed, the center line of the boom cylinder 62 coincides with the first center line M, which facilitates the calibration of the placement position of the boom 6 and improves the positioning accuracy.

[0042] In one embodiment, the support frame assembly 2 includes a crossbeam 21, a longitudinal beam 22, and a base 24. The crossbeam 21 is fixedly connected to the longitudinal beam 22, the longitudinal beam 22 is fixedly connected to the base 24, the base 24 is fixedly connected to the work platform 1, and the adjustment frame 4 is disposed on the longitudinal beam 22 and located below the crossbeam 21.

[0043] The crossbeam 21 consists of at least one row of profiles, and the longitudinal beam 22 consists of at least one row of profiles. The profiles can be regular profiles, such as round or rectangular profiles; they can also be irregular or irregularly shaped profiles, etc., without limitation. The number of profiles can be increased according to the load-bearing capacity requirements to enhance the stability and load-bearing capacity of the crossbeam 21 and longitudinal beam 22. Figures 1-3 and Figure 5 As shown, in this embodiment, the crossbeam 21 is composed of two rows of rectangular tubes, and the longitudinal beam 22 is composed of two rows of rectangular tubes. The crossbeam 21 and the longitudinal beam 22 are welded together, the longitudinal beam 22 is welded together to the base 24, and the base 24 is welded together to the working platform 1. The base 24 is composed of a base plate and left and right plates that are vertically connected to and fixed to the base plate. After being machined, the base 24 can serve as a reference, so that the support frame assembly 2 is symmetrically distributed along the first center line M and fixed on the working platform 1.

[0044] In one embodiment, the support frame assembly 2 further includes a plurality of second positioning components 23 disposed on the crossbeam 21 for positioning the boom 6. The second positioning components 23 include a first positioning plate 231 disposed on the crossbeam 21, and the first positioning plate 231 is provided with a plurality of positioning posts 232 of different lengths.

[0045] The bushing assembly has a groove, into which the second positioning component 23 can be inserted to position and support the bushing assembly. The first positioning plate 231 has several positioning posts 232 of different lengths (e.g., Figures 1-3 and Figure 5As shown in the figure, it is easy to insert into the groove, which serves as a positioning and support function, further improving the positioning accuracy.

[0046] In one embodiment, the support frame assembly 2 further includes a plurality of adjustment frame mounting plates 25 disposed on the longitudinal beam 22. The adjustment frame mounting plates 25 are provided with through holes for the adjustment frame 4 to pass through, and the adjustment frame 4 and the adjustment frame mounting plates 25 are detachably connected.

[0047] like Figure 3 As shown, several adjusting bracket mounting plates 25 are spaced apart and symmetrically arranged on the longitudinal beam 22. The adjusting bracket 4 and the adjusting bracket mounting plate 25 are detachably connected, which facilitates the adjusting bracket 4 to move up and down to adjust its positioning position according to different models of boom 6, so as to facilitate subsequent processing and welding. At the same time, the positions of the first hydraulic cylinder mounting plate 61 and the second hydraulic cylinder mounting plate 61 are located by measuring the distance between the adjusting bracket mounting plate 25 and the movement control component 5.

[0048] In one embodiment, a second alignment structure is provided at the midpoint of the crossbeam 21, which is used to calibrate the placement position of the boom 6.

[0049] The second alignment structure can be a straight line structure with a protrusion or recess at the midpoint of the crossbeam 21, or a continuous or spaced dotted structure, or a center line marked at the midpoint of the crossbeam 21. Any structure that can calibrate the placement of the boom 6 is acceptable and is not limited here. In one embodiment, the second alignment structure is a second center line marked at the midpoint of the crossbeam 21, used as a reference when placing the boom cylinder 62.

[0050] In one embodiment, the motion control component 5 includes a movable ring 51 through which the adjustment frame 4 passes, a second positioning plate 52 for positioning the first component 61, and a handle 53. The movable ring 51 is disposed at one end of the motion control component 5, and the second positioning plate 52 is disposed at the other end of the motion control component 5. The motion control component 5 is movably connected to the adjustment frame 4 through the movable ring 51.

[0051] like Figure 4As shown, the mobile control assembly 5 can move left and right on the adjusting frame 4 through the mobile ring 51, so that the second positioning plate 52 can automatically adjust the position left and right according to the distance between the first cylinder mounting plate 61 and the second cylinder mounting plate 61. The adjusting frame 4 and the mobile ring 51 cooperate to ensure that the end surface of the second positioning plate 52 is perpendicular to the surface of the working platform 1, and the second positioning plate 52 can position the first cylinder mounting plate 61 and the second cylinder mounting plate 61, so as to ensure that the first cylinder mounting plate 61 and the second cylinder mounting plate 61 are perpendicular to the bottom of the boom cylinder 62, improve the positioning accuracy, and avoid interference with the cylinder during extension and retraction. The distance between the adjusting frame mounting plate 25 and the mobile ring 51 can be measured to position the first cylinder mounting plate 61 and the second cylinder mounting plate 61. The handle 53 is convenient for the operator to carry.

[0052] In an embodiment, the mobile control assembly 5 further comprises a fixing assembly 54 arranged on the second positioning plate 52, and the fixing assembly 54 comprises a pressing plate 541 arranged on the second positioning plate 52 and a locking piece 542 arranged on the pressing plate 541.

[0053] As shown in Figures 1-2 and Figures 4-6 After the positions of the first cylinder mounting plate 61 and the second cylinder mounting plate 61 are positioned by the second positioning plate 52, the first cylinder mounting plate 61 and the second cylinder mounting plate 61 are pressed by the pressing plate 541 respectively, and then the locking piece 542 is rotated to fix the first cylinder mounting plate 61 and the second cylinder mounting plate 61. In this embodiment, the locking piece 542 is a bolt.

[0054] In an embodiment, the first positioning assembly 3 comprises:

[0055] at least one first positioning piece 31 for supporting and positioning the second component 62 in the height direction, the first positioning piece 31 being arranged on the working platform 1 and above the first alignment structure M;

[0056] and a plurality of second positioning pieces 32 arranged on the working platform 1 and sequentially arranged in pairs along the first alignment structure M, the second positioning piece 32 being used for fixing the second component 62 in the width direction, and the second positioning piece 32 being assembled or welded on the working platform 1.

[0057] In an embodiment, the first positioning piece 31 is arranged as one, the support frame assembly 2 is arranged at one end of the working platform 1, and the first positioning piece 31 is arranged at the other end of the working platform 1. The first positioning piece 31 is arranged above the first alignment structure M and in contact with the bottom of the boom cylinder 62, which facilitates supporting the boom cylinder 62 and positioning the boom cylinder 62 in the height direction, thereby improving the positioning accuracy.

[0058] As shown in Figure 1 and Figure 5 In an embodiment, the first positioning member 31 is provided in at least two, and the at least two first positioning members 31 are arranged at intervals along the length direction of the working platform 1. The first positioning member 31 is arranged above the first positioning structure M and in contact with the bottom of the boom cylinder 62, so as to support different parts of the boom cylinder 62 in the length direction and position in the height direction, further improving the positioning accuracy of the boom cylinder 62.

[0059] In an embodiment, the second positioning member 32 arranged on the working platform 1 and arranged in pairs along the first positioning structure M is a group. The support frame assembly 2 is arranged at one end of the working platform 1, and a pair of second positioning members 32 is arranged at the other end of the working platform 1. The first and last positioning of the boom (6) can be realized by moving the control assembly 5 and the second positioning member 32. The pair of second positioning members 32 are in contact with the two ends of the boom cylinder 62 in the width direction, so as to position and fix the boom cylinder 62 in the width direction, improve the positioning accuracy, and facilitate post-processing after welding.

[0060] As shown in Figure 1 and Figure 5 In an embodiment, the second positioning member 32 arranged on the working platform 1 and arranged in pairs along the first positioning structure M is at least two groups. The at least two pairs of second positioning members 32 are arranged at intervals along the length direction of the working platform 1. The pair of second positioning members 32 are in contact with the two ends of the boom cylinder 62 in the width direction, so as to position and fix different parts of the boom cylinder 62 in the length direction in the width direction, further improving the positioning accuracy and machining accuracy of the boom cylinder 62.

[0061] The second positioning member 32 can be fixedly connected to the working platform 1 by screw connection, key connection, pin connection, tooth connection, welding connection, bolt connection, and sleeve connection.

[0062] In an embodiment, the first positioning member 31 is provided in two, and the pair of second positioning members 32 is provided in two groups. One pair of second positioning members 32 is arranged near the support frame assembly 2, and the other pair of second positioning members 32 is arranged at the other end of the working platform 1 away from the support frame assembly 2. The two first positioning members 31 are respectively arranged on one side of the two pairs of second positioning members 32 near the support frame assembly 2.

[0063] Through the cooperation of the first positioning member 31 and the second positioning member 32, the boom cylinder 62 can be accurately fixed on the working platform 1, improving the positioning accuracy and facilitating subsequent welding and machining processing.

[0064] In an embodiment, the first positioning member 31 is adjustable in the height direction.

[0065] The first positioning member 31 is telescopic in height direction in use, facilitating the adjustment of the height of the boom cylinder 62.

[0066] In an embodiment, the distance between the pairs of second positioning members 32 is adjustable, and each of the pairs of second positioning members 32 is provided with a clamping block on the side facing each other.

[0067] The pairs of second positioning members 32 are relatively close or relatively far away by adjustment. In actual operation, the boom cylinder 62 is first placed between the pairs of second positioning members 32, and then the pairs of second positioning members 32 are relatively close to clamp the boom cylinder 62 by the clamping blocks, so as to realize the automatic centering and clamping of the boom cylinder 62. When the machining is completed, the pairs of second positioning members 32 are relatively far away to release the boom cylinder 62. By providing the pairs of second positioning members 32, the automatic centering and clamping of the boom cylinder 62 can be realized, and the positioning precision is high. At the same time, by relatively close or relatively far away of the pairs of second positioning members 32, it can adapt to the positioning of the boom cylinder 62 of different models of the boom 6, so that the versatility is stronger. By providing the clamping blocks, the clamping contact area with the boom cylinder 62 can be reduced, so that the clamping is more secure and the centering is more accurate.

[0068] In an embodiment, the second positioning member 32 further comprises a positioning seat fixed on the working platform 1, and a lead screw is installed on the positioning seat. The pairs of second positioning members 32 are threadedly connected to the lead screw, and the lead screw is driven by a driving unit to relatively close or relatively far away the pairs of second positioning members 32. The pairs of second positioning members 32 are respectively threadedly connected to the positive screw thread end and the reverse screw thread end of the lead screw, so that the driving unit can drive the pairs of second positioning members 32 to relatively close or relatively far away. Of course, the relatively close or relatively far away of the pairs of second positioning members 32 can also be realized by other structures, for example, a gear and rack positive and negative transmission mechanism can be used. Similarly, the driving unit can also take various forms, as long as it can drive the lead screw to rotate, for example, it can be a motor or a hydraulic motor.

[0069] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A boom assembly positioning device for positioning a component of a boom (6) during assembly of the boom (6), characterized in that, The boom assembly positioning device comprises a working platform (1), a support frame assembly (2) and a first positioning assembly (3) arranged on the working platform (1), the first positioning assembly (3) is used for fixing and positioning a second part (62) of the boom (6), the support frame assembly (2) comprises an adjusting frame (4) and a movement control assembly (5) movably connected with the adjusting frame (4), the movement control assembly (5) is used for fixing a first part (61) of the boom (6) and adjusting the relative position of the first part (61) and the second part (62).

2. The boom assembly positioning device of claim 1, wherein, The working platform (1) is provided with a first alignment structure (M) for calibrating the placement position of the boom (6).

3. The boom assembly positioning device of claim 1, wherein, The support frame assembly (2) comprises a cross beam (21), a longitudinal beam (22) and a base (24), the cross beam (21) is fixedly connected with the longitudinal beam (22), the longitudinal beam (22) is fixedly connected with the base (24), the base (24) is fixedly connected with the working platform (1), and the adjusting frame (4) is arranged on the longitudinal beam (22) and below the cross beam (21).

4. The boom assembly positioning device of claim 3, wherein, The support frame assembly (2) further comprises a plurality of second positioning assemblies (23) arranged on the cross beam (21) and used for positioning the boom (6), the second positioning assembly (23) comprises a first positioning plate (231) arranged on the cross beam (21), and a plurality of positioning columns (232) with different lengths are arranged on the first positioning plate (231).

5. The boom assembly positioning device of claim 3, wherein, The support frame assembly (2) further comprises a plurality of adjusting frame mounting plates (25) arranged on the longitudinal beam (22), the adjusting frame mounting plate (25) is provided with a through hole through which the adjusting frame (4) passes, and the adjusting frame (4) and the adjusting frame mounting plate (25) are detachably connected.

6. The boom assembly positioning device of claim 3, wherein, A second alignment structure is arranged at the midpoint of the cross beam (21), and the second alignment structure is used for calibrating the placement position of the boom (6).

7. The boom assembly positioning device of claim 1, wherein, The movement control assembly (5) comprises a movement ring (51) through which the adjusting frame (4) passes, a second positioning plate (52) used for positioning the first part (61) and a handle (53), the movement ring (51) is arranged at one end of the movement control assembly (5), the second positioning plate (52) is arranged at the other end of the movement control assembly (5), and the movement control assembly (5) is movably connected with the adjusting frame (4) through the movement ring (51).

8. The boom assembly positioning device of claim 7, wherein, The movement control assembly (5) further comprises a fixing assembly (54) arranged on the second positioning plate (52), the fixing assembly (54) comprises a pressing plate (541) arranged on the second positioning plate (52) and a locking piece (542) arranged on the pressing plate (541).

9. The boom assembly positioning device of claim 2, wherein, The first positioning assembly (3) comprises: At least one first positioning member (31) is arranged on the working platform (1) and above the first positioning structure (M) and is used to support and position the second component (62) in the height direction; And a plurality of second positioning members (32) are arranged on the working platform (1) and sequentially arranged in pairs along the first positioning structure (M), and the second positioning members (32) are used to fix the second component (62) in the width direction, and the second positioning members (32) are assembled or welded on the working platform (1).

10. The boom assembly positioning device of claim 9, wherein, The first positioning member (31) is provided in two pairs, and the second positioning member (32) is provided in two groups, one group of the second positioning member (32) is arranged near the support frame assembly (2), the other group of the second positioning member (32) is arranged at the other end of the working platform (1) away from the support frame assembly (2), and the two first positioning members (31) are respectively arranged on one side of the two groups of the second positioning member (32) near the support frame assembly (2).

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