Segmented boom

Abstract

The present invention belongs to the field of engineering machinery lifting booms, and discloses a segmented boom, comprising: a first box-type boom section, a second box-type boom section, a first joint, a second joint, and a reinforced locking structure, wherein the first box-type boom section and the second box-type boom section are adjacently arranged along the length direction of the boom; the first joint comprises a first plate body fixed to the end opening of the first box-type boom section, a first plate hole formed through the first plate body, and a sleeve aligned with the first plate hole and extending perpendicularly to the plate surface of the first plate body; the second joint comprises a second plate body fixed to the end opening of the second box-type boom section and a pin extending perpendicularly to the plate surface of the second plate body, the pin passing through the first plate hole and being detachably plugged and fixed in the sleeve, the first plate body and the second plate body forming a plate surface butt joint; and a reinforced locking structure for locking the pin and the sleeve. The segmented boom of the present invention has excellent force-bearing performance, high reliability of connection between boom sections, low risk of damage, and low difficulty in assembly and disassembly.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery lifting booms, and in particular to a segmented boom. Background Art

[0002] Engineering vehicles can use long booms for high-altitude or long-distance operations. For example, pump trucks can use long booms to transport concrete to distant pouring points. Existing long booms for pump trucks are usually formed in one piece using welding technology. However, the one-piece long boom faces problems such as easy deformation during manufacturing, limited transportation, and difficulty in maintenance and replacement. In order to solve this problem, it is easy to think of manufacturing the boom in sections. However, since the boom is the main load-bearing part of the pump truck, the boom's variable posture causes a variety of working conditions, and the force conditions of the boom are extremely complex. It has to withstand alternating loads such as shear, bending moment, and torque, as well as loads such as accidental impacts, and is very prone to damage. Therefore, it is necessary to ensure that the connection between the boom sections is reliable. However, the connection method in the existing technology has poor reliability. Therefore, there is no segmented boom in the existing technology that can be applied to engineering machinery such as pump trucks that require lifting the boom for operation. Summary of the Invention

[0003] In response to at least one of the above-mentioned defects or shortcomings of the prior art, the present invention provides a segmented boom, which can greatly improve the stress-bearing performance of the boom, effectively improve the connection reliability between boom sections, and effectively reduce the risk of damage and the difficulty of disassembly and assembly.

[0004] To achieve the above object, the present invention provides a segmented boom, comprising:

[0005] The first box-shaped boom section and the second box-shaped boom section are adjacently arranged along the length direction of the boom;

[0006] The first joint includes a first plate body fixed to the end opening of the first box-shaped boom section, a first plate hole formed through the first plate body, and a sleeve aligned with the first plate hole and extending perpendicular to the plate surface of the first plate body;

[0007] A second joint includes a second plate fixed to an end opening of the second box-shaped boom section and a pin extending perpendicular to a plate surface of the second plate, the pin passing through the first plate hole and being removably inserted and fixed in the sleeve, the first plate and the second plate forming a butt joint; and

[0008] A reinforced locking structure is used to lock the latch and the sleeve.

[0009] Optionally, the outer peripheral wall of the pin and the inner peripheral wall of the sleeve form a keyway fitting connection.

[0010] Optionally, the outer peripheral wall of the plug forms a keyway fitting connection with the inner peripheral wall of the first plate hole.

[0011] Optionally, the first joint includes four first plate holes distributed at the four corners of the first plate body and four sleeves arranged one-to-one with the four first plate holes, and the second joint includes four pins distributed at the four corners of the second plate body, and the four pins pass through the four first plate holes one-to-one and are detachably plugged and fixed in the four sleeves.

[0012] Optionally, the latch is formed with a latch hollow cavity, the reinforced locking structure includes a locking pin, the locking pin is interference-fitted into the latch hollow cavity, or the outer peripheral wall of the locking pin is threadedly engaged with the inner peripheral wall of the latch hollow cavity;

[0013] Alternatively, an external thread is formed on the outer peripheral wall of the pin, and one end of the pin extends out of the sleeve and forms a threaded fit with the locking nut.

[0014] Optionally, two ends of the sleeve are respectively formed as a sleeve outer end and a sleeve inner end, and the sleeve inner end is detachably connected to the first plate body.

[0015] Optionally, the inner end of the sleeve is interference fit in the first plate hole.

[0016] Optionally, the outer diameter of the sleeve at each cross-sectional position between the inner end of the sleeve and the outer end of the sleeve is greater than the outer diameter of the inner end of the sleeve.

[0017] Optionally, two ends of the sleeve are respectively formed as a sleeve outer end and a sleeve inner end, and the sleeve inner end is fixedly connected to the first plate body in a non-detachable manner.

[0018] Optionally, two ends of the latch are respectively formed as an outer latch end and an inner latch end, and the inner latch end is detachably connected to the second plate.

[0019] Optionally, the second joint further includes a limiting plate, the pin is vertically fixedly connected to the limiting plate through the inner end of the pin, a second plate hole is formed through the second plate body, the pin is arranged through the second plate hole, and the limiting plate and the second plate body form a plate surface connection.

[0020] Optionally, the outer peripheral wall of the plug and the inner peripheral wall of the second plate hole form a keyway fitting connection.

[0021] Optionally, two ends of the latch are respectively formed as an outer latch end and an inner latch end, and the inner latch end is fixedly connected to the second plate body in a non-detachable manner.

[0022] In the segmented boom of the present invention, the first and second box-type boom sections can be assembled and disassembled via highly reliable first and second joints, and locked via a reinforced locking structure. Especially for booms with variable postures, the latch in the second joint engages with the sleeve in the first joint, allowing them to jointly withstand alternating loads such as shear, bending moment, and torque applied to the boom. This significantly improves the load-bearing capacity of the segmented boom, effectively enhancing its operational stability and reducing the risk of deformation and damage. Furthermore, the simple assembly and disassembly of the first and second joints effectively enhances the efficiency of assembly and disassembly between the first and second box-type boom sections.

[0023] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0025] Figure 1 An exploded view of a segmented boom in a specific embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of a first connector in a specific embodiment of the present invention;

[0027] Figure 3 for Figure 2 A schematic diagram of the first joint in another perspective;

[0028] Figure 4 is a schematic diagram of a second joint in a specific embodiment of the present invention;

[0029] Figure 5 is a schematic diagram of another second connector in a specific embodiment of the present invention;

[0030] Figure 6 for Figure 5 Exploded view of the second connector in .

[0031] Description of reference numerals:

[0032] 1 First plate 2 First plate hole

[0033] 3 Sleeve 4 Second plate

[0034] 5 Latch 6 Limit plate

[0035] 7 Second plate hole 8 Locking pin

[0036] 9 Locking pin cap body 10 First box-type arm section

[0037] 11 Second box boom section DETAILED DESCRIPTION

[0038] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not used to limit the embodiment of the present invention.

[0039] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other.

[0040] In the embodiments of the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used to describe the relative positional relationships of components in the directions shown in the drawings or in the vertical, perpendicular or gravity directions.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0042] like Figures 1 to 6 As shown, an exemplary embodiment of the present invention provides a segmented boom that can be used in engineering machinery such as concrete pump trucks. The segmented boom mainly includes a first box-type boom section 10, a second box-type boom section 11, a first joint, and a second joint.

[0043] The first box-type boom section 10 and the second box-type boom section 11 refer to any two adjacent box-type boom sections along the length of the sectional boom. During assembly, the first box-type boom section 10 and the second box-type boom section 11 are butted end-to-end via a first joint and a second joint. A box-type boom section is formed by a plurality of circumferential panels sequentially enclosed along the circumference. The boom section generally has a rectangular cross-section, with end openings formed at the ends of the boom section.

[0044] The first joint comprises a first plate 1 fixed to the end opening of the first box-type boom section 10, a first plate hole 2 formed through the first plate 1, and a sleeve 3 aligned with the first plate hole 2 and extending perpendicularly to the plate surface of the first plate 1. Thus, the first joint serves as the end joint of the first box-type boom section 10. When the first box-type boom section 10 and the second box-type boom section 11 are assembled, the sleeve 3 extends into the first box-type boom section 10. Prior to the assembly of the first box-type boom section 10 and the second box-type boom section 11, this exemplary embodiment does not limit whether the sleeve 3 is fixed to the first plate 1.

[0045] The second joint includes a second plate 4 fixed to the end opening of the second box-type boom section 11 and a latch 5 extending perpendicularly from the plate surface of the second plate 4, thereby serving as the end joint of the second box-type boom section 11. When the first box-type boom section 10 and the second box-type boom section 11 are assembled, the latch 5 is located outside the end opening of the second box-type boom section 11, passes through the first plate hole 2, and is removably inserted and fixed within the sleeve 3. At the same time, the first plate 1 and the second plate 4 are in plate-surface contact, thereby forming an end-to-end contact between the first box-type boom section 10 and the second box-type boom section 11. Before the first box-type boom section 10 and the second box-type boom section 11 are assembled, this exemplary embodiment does not limit whether the latch 5 is fixed to the second plate 4.

[0046] Based on the above arrangement, in the sectional boom of this exemplary embodiment, the first box-type boom section 10 and the second box-type boom section 11 are removably assembled and disassembled via the highly reliable first and second joints. Especially for booms with variable postures, the latch 5 in the second joint engages with the sleeve 3 in the first joint, allowing them to jointly withstand alternating loads such as shear, bending, and torque applied to the boom. Conventional sectional booms typically use conventional flanges and bolts to connect boom sections. Bolts are particularly susceptible to breakage when subjected to shear forces, causing boom instability. Therefore, compared to the prior art, the solution of this exemplary embodiment significantly improves the load-bearing capacity of the sectional boom, effectively enhancing its operational stability and reducing the risk of deformation and damage. Furthermore, the simplified assembly and disassembly of the first and second joints effectively improves the efficiency of assembly and disassembly of the first and second box-type boom sections 10 and 11. This allows, in particular, the manufacture of long boom sections, allowing them to be manufactured in sections and then assembled, significantly reducing manufacturing complexity. When a section of the sectional boom becomes damaged, reaches its set service life, or is estimated to have a limited remaining service life, only that section can be removed for repair or replacement, significantly shortening the time required to return the sectional boom to service. Furthermore, when the first and second box-type boom sections 10 and 11 are assembled, the sleeve 3 extends into the first box-type boom section 10, and the latch 5 is inserted into the sleeve 3. Both the sleeve 3 and the latch 5 are located within the first box-type boom section 10, ensuring waterproofing and rust resistance. This ensures the boom's plug-in fit strength over long-term use and significantly extends the service life of the first and second joints.

[0047] In one embodiment, by providing a plurality of latches 5 and a plurality of sleeves 3 that are plugged and fixed in a one-to-one correspondence between the first box-type boom section 10 and the second box-type boom section 11, connection reliability can be further enhanced. For example, corresponding to a conventional box-type boom section with a rectangular cross-section, the first joint can include four first plate holes 2 distributed at the four corners of the first plate body 1 and four sleeves 3 that are aligned with the four first plate holes 2. The second joint can include four latches 5 distributed at the four corners of the second plate body 4. The four latches 5 pass through the four first plate holes 2 in a one-to-one correspondence and are removably plugged and fixed within the four sleeves 3. In this way, a stable connection can be formed at the four corners of the docking position of the first box-type boom section 10 and the second box-type boom section 11, further enhancing the ability of the segmented boom to withstand alternating loads such as shear force, bending moment, and torque.

[0048] In one embodiment, the outer circumferential wall of the latch 5 forms a keyway for mating connection with the inner circumferential wall of the sleeve 3. For example, the outer circumferential wall of the latch 5 is formed with a plurality of latch keys spaced in sequence along the circumferential direction, and the inner circumferential wall of the sleeve 3 is formed with a plurality of sleeve keyways corresponding one-to-one to the plurality of latch keys. When the latch 5 is inserted into the sleeve 3, the plurality of latch keys and the plurality of sleeve keyways cooperate in a one-to-one manner, thereby circumferentially limiting the latch 5 and the sleeve 3, preventing relative rotation and improving connection stability. At the same time, the mating latch keys and sleeve keyways can greatly improve the ability to withstand torque loads applied to the arm.

[0049] In one embodiment, the outer circumferential wall of the latch 5 may also form a keyway for mating connection with the inner circumferential wall of the first plate hole 2. For example, if a plurality of latch keys are formed on the outer circumferential wall of the latch 5 and spaced apart in sequence along the circumferential direction, the inner circumferential wall of the first plate hole 2 may be formed with a plurality of plate hole keyways corresponding to the plurality of latch keys. In this way, when the latch 5 is inserted into the first plate hole 2, the latch 5 and the first plate body 1 are circumferentially limited by the one-to-one mating of the plurality of latch keys and the plurality of plate hole keyways, thereby preventing relative rotation and improving connection stability. Similarly, the use of the mating latch keys and plate hole keyways can also improve the ability to withstand torque loads applied to the arm.

[0050] Preferably, the above-mentioned multiple keys and slots are evenly distributed along the circumferential direction.

[0051] It should be noted that, in an optional embodiment, the connection between the first box-type boom section 10 and the second box-type boom section 11 is stable through the plug-in fit of the latch 5 and the sleeve 3, for example, by the interference fit of the latch 5 in the sleeve 3. However, to further improve the reliability of the connection and facilitate the disassembly of the joint, a reinforced locking structure may be provided in the segmented boom of this exemplary embodiment. This reinforced locking structure is used to lock the latch 5 and the sleeve 3 together to prevent the latch 5 and the sleeve 3 from loosening under extreme operating conditions (for example, when the load borne by the boom suddenly exceeds the design value by a large margin), thereby preventing the boom from becoming unstable due to the loosening of the latch 5 and the sleeve 3.

[0052] As an embodiment of the enhanced locking structure, the latch 5 is formed with a latch hollow cavity, and the enhanced locking structure includes a locking pin, which is interference-fitted in the latch hollow cavity, or the outer peripheral wall of the locking pin is threadedly matched with the inner peripheral wall of the latch hollow cavity, both of which can achieve locking of the first joint and the second joint.

[0053] In one embodiment, the locking pin includes a locking pin shaft body 8 whose inner and outer ends are formed as the inner and outer ends of the shaft, respectively, and a locking pin cap body 9 fixedly connected to the outer end of the shaft. The inner end of the shaft is detachably inserted and fixed in the hollow cavity of the plug pin. When the plug pin 5 is inserted into the sleeve 3, the locking pin cap body 9 and the outer end surface of the sleeve 3 are axially limited and abutted. As a result, the locking pin shaft body 8 can pass through the sleeve 3 and the plug pin 5 from the inner end of the shaft until the locking pin cap body 9 abuts the outer end surface of the sleeve 3, thereby locking the sleeve 3 between the plug pin 5 and the locking pin cap body 9, ensuring the locking state of the plug pin 5 and the sleeve 3. When the locking pin shaft body 8 is threadedly engaged with the hollow cavity of the plug pin, a bolt can be used as the locking pin. In this case, the nut of the bolt is the locking pin cap body 9.

[0054] In the case where the latch pin 5 does not have a hollow cavity, another mounting method of a locking pin can be used to lock the latch pin 5 and the sleeve 3. For example, two mutually aligned locking holes can be formed on the peripheral walls of the latch pin 5 and the sleeve 3, and the locking pin can be passed through the two locking holes to connect them, thereby also achieving locking of the latch pin 5 and the sleeve 3.

[0055] In an alternative embodiment, where the latch 5 does not have a hollow cavity, the first and second joints can be locked by providing external threads on the outer wall of the latch 5 that mate with a lock nut. Specifically, when the latch 5 is inserted into the sleeve 3, one end of the latch 5 extends outside the sleeve 3, and the lock nut mates with the external threads on this end of the latch 5.

[0056] To facilitate the installation of the locking pin, a disassembly avoidance opening that is connected to the end opening of the first box-type arm section 10 to avoid the disassembly of the locking pin can be formed through the peripheral wall of the first box-type arm section 10. The position of the disassembly avoidance opening is as close as possible to the end opening of the first box-type arm section 10. In this way, when the end opening of the first box-type arm section 10 is covered by the first plate body 1, the operator can reach the sleeve 3 extending into the first box-type arm section 10 through the disassembly avoidance opening, thereby facilitating the disassembly and assembly of the locking pin.

[0057] In one embodiment, the two ends of the sleeve 3 are respectively formed as an outer end of the sleeve and an inner end of the sleeve, and the inner end of the sleeve forms a detachable connection with the first plate body 1. Specifically, the inner end of the sleeve can be detachably plugged and fixed in the first plate hole 2, or the end face of the inner end of the sleeve can be directly docked with the plate face of the first plate body 1. Regardless of whether plugging or direct docking is adopted, when the first joint and the second joint are docked, the second joint can simultaneously connect and fix the first plate body 1 and the sleeve 3 through the pin 5. In general, the sleeve 3 and the first plate body 1 are set to be detachably connected, so that the sleeve 3 can be replaced, repaired, etc. according to actual conditions, thereby improving the versatility of the first joint. For example, the sleeve 3 with the inner end of the sleeve of different shapes and sizes can be adaptively replaced, which is more convenient.

[0058] In one embodiment, the inner end of the sleeve 3 is inserted into the first plate hole 2 through interference fit. Specifically, the outer diameter of the inner end of the sleeve can be set to be larger than the maximum diameter of the first plate hole 2. When the inner end of the sleeve is inserted into the first plate hole 2, the interference fit between the inner end of the sleeve and the first plate hole 2 can ensure that the sleeve 3 is fixedly connected to the first plate body 1, thereby enhancing the strength and stability of the connection between the first box-type boom section 10 and the second box-type boom section 11.

[0059] Furthermore, in order to enhance the effectiveness of the connection between the first joint and the second joint, the outer diameter of the sleeve 3 at each cross-sectional position between the inner end of the sleeve and the outer end of the sleeve is greater than the outer diameter of the inner end of the sleeve. Specifically, the outer diameter of the sleeve 3 gradually increases from the inner end of the sleeve to the outer end of the sleeve, thereby limiting the relative position of the sleeve 3 and the first plate body 1, ensuring that the first plate body 1 cannot move toward the outer end of the sleeve after insertion. In other embodiments, the sleeve 3 can also be formed into a large outer diameter section and a small outer diameter section, correspondingly, the inner end of the sleeve is located in the small outer diameter section, and the outer end of the sleeve is located in the large outer diameter section, thereby limiting the displacement of the first plate body 1 through the large outer diameter section. In addition, both the large outer diameter section and the small outer diameter section can be set to gradually increase in outer diameter, thereby enhancing the smoothness of the connection operation between the sleeve 3 and the first plate body 1.

[0060] In one embodiment, the end face of the inner end of the sleeve is connected to the plate surface of the first plate body 1 at the peripheral position of the first plate hole 2. That is to say, the outer diameter of the inner end of the sleeve can be set to be larger than the maximum aperture of the first plate hole 2. When the inner end of the sleeve is not inserted into the first plate hole 2, the first plate body 1 is pressed by the second joint to make the end face of the inner end of the sleeve connected to the plate surface at the peripheral position of the first plate hole 2. At the same time, the end face of the inner end of the sleeve can limit the first plate body 1 to ensure that the first plate body 1 does not move toward the outer end of the sleeve.

[0061] In one embodiment, the diameter of the first plate hole 2 is the same as the maximum outer diameter of the corresponding latch 5 that passes through the first plate hole 2. Therefore, when the first and second joints are connected, the outer wall of the latch 5 can abut the inner wall of the first plate hole 2. The first plate 1 limits the latch 5, preventing radial displacement between the two joints, improving the stability of the connection between the first and second joints, and reducing the risk of damage to the boom.

[0062] In one embodiment, the ends of the sleeve 3 are formed into an outer sleeve end and an inner sleeve end, respectively, and the inner sleeve end is fixedly connected to the first plate 1 in a non-detachable manner. For example, the end surface of the inner sleeve end can be fixedly connected to the plate surface of the first plate 1 by welding or other processing methods, or the sleeve 3 can be integrally formed with the first plate 1 by integral stamping, 3D printing, or other methods, thereby enhancing the connection stability and load capacity of the sleeve 3 and the first plate 1.

[0063] In one embodiment, the two ends of the latch 5 are formed as an outer latch end and an inner latch end, respectively, and the inner latch end is detachably connected to the second plate body 4. For example, the second plate body 4 may be formed with a plate hole that is an interference fit with the inner latch end, so that the latch 5 can be inserted and fixed to the second plate body 4. In addition, a detachable locking structure can also be provided to lock the inner latch end with the second plate body 4. For this reason, this exemplary embodiment does not limit the detachable connection method between the inner latch end and the second plate body 4. Overall, the detachable connection between the latch 5 and the second plate body 4 can enhance the versatility of the second joint, facilitate replacement and maintenance of the latch 5, and improve the convenience of joint assembly.

[0064] To enhance the stability of the connection, the second joint further includes a retaining plate 6, to which the latch 5 is vertically fixedly connected via its inner end. This connection can be achieved by welding, integral stamping, or other methods. A second plate hole 7 is formed through the second plate body 4. When the first and second joints are in contact, the latch 5 passes through the second plate hole 7, and the retaining plate 6 and the second plate body 4 form a surface-to-surface contact. Thus, the retaining plate 6 can limit the latch 5, effectively preventing the inner end of the latch from disengaging from the second plate hole 7, thereby enhancing the stability of the connection process.

[0065] In one embodiment, the outer peripheral wall of the latch 5 forms a keyway for mating connection with the inner peripheral wall of the second plate hole 7. Specifically, the outer peripheral wall of the latch 5 forms an outwardly protruding latch key along the circumference, and the inner peripheral wall of the second plate hole 7 forms a plate hole keyway along the circumference corresponding to the latch key. As a result, when the latch 5 is inserted into the second plate hole 7, the latch key and the plate hole keyway cooperate to limit the position of the latch 5 and the second plate body 4, preventing relative rotation between the latch 5 and the second plate body 4, thereby improving the stability of the connection and enhancing the torque load bearing capacity of the joint assembly of this exemplary embodiment.

[0066] In one embodiment, the ends of the latch 5 are formed into an outer latch end and an inner latch end, respectively, and the inner latch end is fixedly connected to the second plate 4 in a non-detachable manner. For example, the end surface of the inner latch end can be fixedly connected to the surface of the second plate 4 by welding or other processing methods, or the latch 5 and the second plate 4 can be integrally formed by integral stamping, 3D printing, or other methods, thereby enhancing the connection stability and load capacity of the latch 5 and the second plate 4.

[0067] The above describes in detail the optional implementation methods of the embodiments of the present invention in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation methods. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all fall within the scope of protection of the embodiments of the present invention.

[0068] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention will no longer separately describe various possible combinations.

[0069] In addition, various implementations of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A segmented boom, characterized in that: The segmented boom comprises: The first box-shaped boom section (10) and the second box-shaped boom section (11) are adjacently arranged along the length direction of the boom; The first joint comprises a first plate body (1) fixed to the end opening of the first box-shaped arm section (10), a first plate hole (2) formed through the first plate body (1), and a sleeve (3) aligned with the first plate hole (2) and extending perpendicularly to the plate surface of the first plate body (1), the number of the first plate holes (2) is four and they are respectively arranged at the four corners of the first plate body (1), the number of the sleeves (3) is four and the four sleeves (3) are aligned with the four first plate holes (2) one by one; The second joint comprises a second plate body (4) fixed to the end opening of the second box-shaped arm section (11) and a pin (5) extending perpendicular to the plate surface of the second plate body (4), wherein the number of the pins (5) is four and they are respectively arranged at the four corners of the second plate body (4), the four pins (5) pass through the four first plate holes (2) in a one-to-one correspondence and are detachably plugged and fixed in the four sleeves (3), and the first plate body (1) and the second plate body (4) form a plate surface butt joint; and A reinforced locking structure is used to lock the latch (5) and the sleeve (3).

2. The segmented boom according to claim 1, characterized in that: The outer peripheral wall of the latch (5) and the inner peripheral wall of the sleeve (3) form a keyway fitting connection.

3. The segmented boom according to claim 2, characterized in that: The outer peripheral wall of the latch pin (5) and the inner peripheral wall of the first plate hole (2) form a keyway fitting connection.

4. The segmented boom according to claim 1, characterized in that: The latch (5) is formed with a latch hollow cavity, and the reinforced locking structure includes a locking pin, the locking pin is interference-inserted in the latch hollow cavity, or the outer peripheral wall of the locking pin is threadedly engaged with the inner peripheral wall of the latch hollow cavity; Alternatively, an external thread is formed on the outer peripheral wall of the latch pin (5), and one end of the latch pin (5) extends out of the sleeve (3) and forms a threaded fit with the locking nut.

5. The segmented boom according to claim 1, characterized in that: The two ends of the sleeve (3) are respectively formed as a sleeve outer end and a sleeve inner end, and the sleeve inner end is detachably connected to the first plate body (1).

6. The segmented boom according to claim 5, characterized in that: The inner end of the sleeve (3) is interference-fitted into the first plate hole (2).

7. The segmented boom according to claim 6, characterized in that: The outer diameter of the sleeve (3) at each cross-sectional position between the sleeve inner end and the sleeve outer end is greater than the outer diameter of the sleeve inner end.

8. The segmented boom according to claim 1, characterized in that: The two ends of the sleeve (3) are respectively formed as a sleeve outer end and a sleeve inner end, and the sleeve inner end is fixedly connected to the first plate body (1) in a non-detachable manner.

9. The segmented boom according to claim 1, characterized in that: The two ends of the latch (5) are respectively formed as an outer latch end and an inner latch end, and the inner latch end is detachably connected to the second plate body (4).

10. The segmented boom according to claim 9, characterized in that: The second joint further comprises a limit plate (6), the latch (5) being vertically fixedly connected to the limit plate (6) via the inner end of the latch, a second plate hole (7) being formed through the second plate body (4), the latch (5) being arranged through the second plate hole (7), and the limit plate (6) and the second plate body (4) forming a plate surface butting.

11. The segmented boom according to claim 10, characterized in that: The outer peripheral wall of the latch pin (5) and the inner peripheral wall of the second plate hole (7) form a keyway fitting connection.

12. The segmented boom according to claim 1, characterized in that: The two ends of the latch (5) are respectively formed as an outer latch end and an inner latch end, and the inner latch end is fixedly connected to the second plate body (4) in a non-detachable manner.

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