Telescopic arm and cantilever of overhead working truck and overhead working truck

Abstract

The utility model relates to the technical field of overhead working trucks, and discloses an overhead working truck telescopic arm, a cantilever and an overhead working truck, the overhead working truck telescopic arm comprises an upper structure and a lower structure which are in butt joint up and down to form a closed contour, and the upper structure and the lower structure are both in bilateral symmetry; the upper structure is of an integrally-formed plate-shaped structure, the cross section of the upper structure comprises a first section, a second section, a third section, a fourth section, a fifth section, a sixth section and a seventh section which are sequentially connected, and the lower structure is of an integrally-formed plate-shaped structure. The cross section of the lower structure comprises an eighth section, a ninth section, a tenth section, an eleventh section, a twelfth section, a thirteenth section, a fourteenth section, a fifteenth section and a sixteenth section which are connected in sequence, the eighth section is in butt joint with the first section, and the sixteenth section is in butt joint with the seventh section. The structure strength is high, bending resistance and torsion resistance are excellent, cost is low, machining is convenient, and the space utilization rate is high.

Description

Technical Field

[0001] This utility model relates to the field of aerial work platform technology, and in particular to an aerial work platform telescopic boom, cantilever, and aerial work platform. Background Technology

[0002] Telescopic aerial work platforms, also known as telescopic boom aerial work platforms, are multi-purpose aerial work vehicles with off-road capabilities and telescopic booms. The telescopic boom is a crucial component of aerial work platforms, and its structure and working principle directly affect the safety and efficiency of aerial operations. Currently, telescopic boom structures are generally simple four- or six-sided box-shaped structures, with limited structural strength and load-bearing capacity, and poor resistance to bending and torsion.

[0003] Therefore, there is an urgent need for a telescopic boom, cantilever, and aerial work platform vehicle to solve the above problems. Utility Model Content

[0004] Based on the above, the purpose of this utility model is to provide a telescopic boom, cantilever, and aerial work platform with high structural strength, superior bending and torsional resistance, low cost, easy processing, and high space utilization.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A telescopic boom for an aerial work platform includes an upper structure and a lower structure that are joined together to form a closed outline. Both the upper and lower structures are left-right symmetrical.

[0007] The superstructure is a one-piece molded plate structure. The cross-section of the superstructure includes sequentially connected segments: the first, second, third, fourth, fifth, sixth, and seventh segments. Segments one, three, five, and seven are parallel to each other. The first segment is further away from the line of symmetry of the superstructure than the third segment, and the seventh segment is further away from the line of symmetry of the superstructure than the fifth segment. Segments three and five are perpendicular to the fourth segment. The angles between the second segment and the first and third segments are obtuse, and the angles between the sixth segment and the fifth and seventh segments are obtuse. The substructure is also a one-piece molded plate structure. The cross-section of the substructure includes sequentially connected segments eight, nine, ten... The segments are: eleventh segment, twelfth segment, thirteenth segment, fourteenth segment, fifteenth segment, and sixteenth segment. The eighth segment connects with the first segment, and the sixteenth segment connects with the seventh segment. The eighth, tenth, fourteenth, and sixteenth segments are parallel to each other. The eighth segment is further away from the line of symmetry of the lower structure than the tenth segment, and the sixteenth segment is further away from the line of symmetry of the lower structure than the fourteenth segment. The angles between the eleventh segment and the tenth and twelfth segments are obtuse. The angles between the thirteenth segment and the fourteenth and twelfth segments are obtuse. The angles between the ninth segment and the eighth and tenth segments are obtuse. The angles between the fifteenth segment and the fourteenth and sixteenth segments are obtuse.

[0008] Among them, the lengths of the second segment, the sixth segment, the ninth segment, and the fifteenth segment are all equal and are k times the thickness of their corresponding plates, where the value of k is between 3 and 6, and the lengths of the second segment, the sixth segment, the ninth segment, and the fifteenth segment are all less than the length of any other segment.

[0009] The plane containing the cross-section of the upper structure and the plane containing the cross-section of the lower structure are perpendicular to the left and right symmetrical planes of the telescopic boom of the aerial work platform.

[0010] As a preferred embodiment, the thickness of the plate corresponding to each segment of the cross-section of the upper structure (100) and lower structure (200) of the telescopic arm is 4mm, and the lengths of the second segment, the sixth segment, the ninth segment and the fifteenth segment are equal, ranging from 13mm to 16mm.

[0011] As a preferred embodiment, the angle between the second segment and the first segment and the third segment is 130°-140°, and the angle between the sixth segment and the fifth segment and the seventh segment is 130°-140°.

[0012] The angles between the eleventh segment and the tenth and twelfth segments are 130°-140°, the angles between the thirteenth segment and the fourteenth and twelfth segments are 130°-140°, the angles between the ninth segment and the eighth and tenth segments are 130°-140°, and the angles between the fifteenth segment and the fourteenth and sixteenth segments are 130°-140°.

[0013] As a preferred embodiment, the fourth segment is further bent into five sub-segments, including a first sub-segment, a second sub-segment, a third sub-segment, a fourth sub-segment, and a fifth sub-segment connected sequentially between the third and fifth segments. The first and fifth sub-segments are located on the same straight line. The third sub-segment is farther away from the lower structure than the first and fifth sub-segments. The angles between the second sub-segment and the first and third sub-segments are obtuse, and the angles between the fourth sub-segment and the third and fifth sub-segments are obtuse.

[0014] The lengths of the second segment and the fourth segment are both equal to the length of the second segment.

[0015] As a preferred embodiment, the second segment and the fourth segment are of equal length, ranging from 13mm to 16mm, and have a thickness of 4mm.

[0016] As a preferred embodiment, the angle between the second segment and the first and third segments is 130°-140°, and the angle between the fourth segment (44) and the third and fifth segments is 130°-140°.

[0017] A cantilever boom for an aerial work platform includes five telescopic boom sections with a 14-sided profile. In a cross-section of the five telescopic boom sections in the retracted state, the distance between any two adjacent first sections is 7-9 mm, the distance between any two adjacent seventh sections is 7-9 mm, the total length of the innermost first and eighth sections is 49-51 mm, the length of the second section is 13-16 mm, the length of the third section is 59-61 mm, and the length of the fourth section is 165-167 mm.

[0018] A cantilever boom for an aerial work platform includes three sections of 14-sided aerial work platform telescopic boom and four sections of 18-sided aerial work platform telescopic boom that are telescopically mounted from the inside out. In a cross-section of the seven sections of the aerial work platform telescopic boom in the retracted state, the distance between any two adjacent first sections is 9-11 mm, the distance between any two adjacent seventh sections is 9-11 mm, the total length of the innermost first and eighth sections is 49-51 mm, the length of the second section is 13-16 mm, the length of the third section is 59-61 mm, and the length of the fourth section is 165-167 mm.

[0019] An aerial work platform vehicle includes the aerial work platform cantilever described in any of the above technical solutions.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model provides a telescopic boom for an aerial work platform. The closed contour formed by the docking of the upper and lower structures is at least a 14-sided polygon. The integrally formed upper and lower structures have good overall structural strength and are easy to manufacture. The docking of the upper and lower structures ensures that the telescopic boom remains stable and reliable under load. At the same time, the left and right sides of the telescopic boom are non-planar protrusions in the contour formed by the docking of the upper and lower structures, which makes the telescopic boom stronger and more capable of bearing greater loads. Moreover, the structural strength of the telescopic boom is obtained from its own structural changes, without the need for additional reinforcing structures, resulting in good space utilization and high structural compactness.

[0022] This utility model also provides a cantilever for an aerial work platform, which is formed by multiple sections of the above-mentioned aerial work platform telescopic boom that are telescopically sleeved together. It has high structural strength, high space utilization, is easy to process, and has low processing cost.

[0023] This utility model also provides an aerial work platform vehicle, including the above-mentioned aerial work platform cantilever, which has better load-bearing capacity and better operational reliability. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of the telescopic boom of the aerial work vehicle with a 14-sided outline provided in this embodiment of the utility model;

[0026] Figure 2 This is a cross-sectional view of the telescopic boom of the aerial work vehicle with a 14-sided outline provided in this embodiment of the utility model;

[0027] Figure 3 This is a cross-sectional view of the telescopic boom of the aerial work vehicle with an 18-sided outline provided in this embodiment of the utility model;

[0028] Figure 4 This is the cross-section of the cantilever of the aerial work platform provided in this embodiment of the utility model. Figure 1 ;

[0029] Figure 5 This is the cross-section of the cantilever of the aerial work platform provided in this embodiment of the utility model. Figure 2 .

[0030] In the picture:

[0031] 100. Upper structure; 200. Lower structure;

[0032] 1. First segment; 2. Second segment; 3. Third segment; 4. Fourth segment; 5. Fifth segment; 6. Sixth segment; 7. Seventh segment; 8. Eighth segment; 9. Ninth segment; 10. Tenth segment; 11. Eleventh segment; 12. Twelfth segment; 13. Thirteenth segment; 14. Fourteenth segment; 15. Fifteenth segment; 16. Sixteenth segment.

[0033] 41. First segment; 42. Second segment; 43. Third segment; 44. Fourth segment; 45. Fifth segment. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, the terms "first" and "second" are merely used for descriptive distinction and have no special meaning.

[0038] like Figure 1As shown, this embodiment provides a telescopic boom for an aerial work platform. The telescopic boom includes an upper structure 100 and a lower structure 200 that are joined together to form a closed profile. Both the upper structure 100 and the lower structure 200 are bilaterally symmetrical. It should be noted that the bilateral symmetry planes of the telescopic boom are perpendicular to the ground and parallel to the length direction of the telescopic boom. The upper structure 100 is an integrally formed plate-like structure. The cross-section of the upper structure 100 includes a first segment 1, a second segment 2, and a third segment 3 connected sequentially. Segments 3, 4, 5, 6, and 7 are parallel to each other. Segment 1 is further away from the line of symmetry of the superstructure 100 relative to segment 3, and segment 7 is further away from the line of symmetry of the superstructure 100 relative to segment 5. Segments 3 and 5 are perpendicular to segment 4. The angle between segment 2 and segments 1 and 3 is obtuse. Segment 6 is perpendicular to segments 5 and 7. The included angle between 7 is an obtuse angle; the lower structure 200 is a one-piece molded plate structure. The cross-section of the lower structure 200 includes the eighth segment 8, the ninth segment 9, the tenth segment 10, the eleventh segment 11, the twelfth segment 12, the thirteenth segment 13, the fourteenth segment 14, the fifteenth segment 15, and the sixteenth segment connected in sequence. The eighth segment 8 connects with the first segment 1, and the sixteenth segment connects with the seventh segment 7. The eighth segment 8, the tenth segment 10, the fourteenth segment 14, and the sixteenth segment are parallel to each other. The eighth segment 8 is relatively... The 10th segment 10 is away from the line of symmetry of the lower structure 200; the 16th segment is away from the line of symmetry of the lower structure 200 compared to the 14th segment 14; the 11th segment 11 forms obtuse angles with the 10th segment 10 and the 12th segment 12 respectively; the 13th segment 13 forms obtuse angles with the 14th segment 14 and the 12th segment 12 respectively; the 9th segment 9 forms obtuse angles with the 8th segment 8 and the 10th segment 10 respectively; and the 15th segment 15 forms obtuse angles with the 14th segment 14 and the 16th segment respectively. The plane containing the cross-section of the upper structure 100 and the plane containing the cross-section of the lower structure 200 are perpendicular to the left and right symmetry planes of the aerial work platform's telescopic boom.

[0039] The closed contour formed by the docking of the upper structure 100 and the lower structure 200 is at least a 14-sided polygon, and the overall structural strength of the integrally formed upper structure 100 and lower structure 200 is good and easy to process; the docking of the upper structure 100 and the lower structure 200 ensures that the telescopic arm remains relatively stable and reliable when bearing load; at the same time, in the contour formed after the docking of the upper structure 100 and the lower structure 200, the left and right sides of the telescopic arm are non-planar convex, which makes the telescopic arm structurally stronger and able to withstand greater loads; and the structural strength of the telescopic arm is enhanced by its own structural changes, without the need for additional reinforcing structures, resulting in good space utilization and high structural compactness.

[0040] In one embodiment, such as Figure 2 As shown, the fourth segment 4 is a straight line, meaning the cross-section of the upper structure 100 is an open heptagon, the cross-section of the lower structure 200 is an open uneptagon, and the closed contour formed after the upper structure 100 and the lower structure 200 are joined is a 14-sided polygon. All other segments, including the first segment, the second segment, the third segment... the sixteenth segment, are all straight line segments.

[0041] In this embodiment, the upper structure 100 is formed from a single sheet of material. It can be formed using a single-pass bending or two-pass molding process, through bending, for example, by repeatedly bending the sheet from one side to the other. For example, processing begins from the left side of the sheet. The left side is stamped with a die to form two bends, corresponding to the obtuse-angled first segment 1 and second segment 2, and the obtuse-angled second segment 2 and third segment 3. Then, the sheet is bent twice from left to right using a bending machine, corresponding to the vertical third segment 3 and fourth segment 4, and the vertical fourth segment 4 and fifth segment 5. Finally, the right side of the sheet is stamped with a die to form two bends, corresponding to the obtuse-angled fifth segment 5 and sixth segment 6, and the obtuse-angled sixth segment 6 and seventh segment 7. It is understood that after bending and stamping, each bend of the sheet has a rounded chamfer.

[0042] Similarly, the lower structure 200 is also a one-piece plate structure, that is, it is also formed by multiple bending processes from a single plate. For example, the left side of a single plate is first stamped with a stamping die to form two bends, corresponding to the obtuse angles of the eighth segment 8 and the ninth segment 9 and the ninth segment 9 and the tenth segment 10 mentioned above; then, the single plate is bent four times from left to right, corresponding to the obtuse angles of the tenth segment 10 and the eleventh segment 11, the eleventh segment 11 and the twelfth segment 12, the twelfth segment 12 and the thirteenth segment 13, and the thirteenth segment 13 and the fourteenth segment 14; then, the right side of the single plate is placed into a stamping die to form two bends, corresponding to the obtuse angles of the fourteenth segment 14 and the fifteenth segment 15 and the fifteenth segment 15 and the sixteenth segment mentioned above. The processing steps for the upper structure 100 and the lower structure 200 are simple, convenient, and efficient, resulting in an upper structure 100 with good overall integrity and high structural strength. Furthermore, the same stamping die can be used for all four stamping operations, saving processing costs and ensuring precise left-right symmetry between the finished upper structure 100 and lower structure 200. Of course, in other embodiments, the processing steps for forming the upper structure 100 and lower structure 200 from a single sheet can be customized according to actual needs. For example, the middle section of the sheet can be bent first, followed by stamping on both sides, or both sides can be stamped first, followed by bending in the middle.

[0043] After the upper structure 100 and the lower structure 200 are processed separately, the joints between the upper structure 100 and the lower structure 200 are welded. Specifically, the plate end of the upper structure 100 corresponding to the first segment 1 is welded to the plate end of the lower structure 200 corresponding to the eighth segment 8, and the plate end of the upper structure 100 corresponding to the seventh segment 7 is welded to the plate end of the lower structure 200 corresponding to the sixteenth segment. This telescopic boom has only two welds, resulting in better overall structural integrity, higher structural rigidity, better manufacturability, and higher processing efficiency.

[0044] In this embodiment, either BS960E material or HG785 high-strength steel can be used, with a plate thickness of 4mm. The lengths of the second segment 2, the sixth segment 6, the ninth segment 9, and the fifteenth segment 15 are all equal and k times their corresponding plate thickness, where k = 13 / 4 to 15 / 4, specifically 13mm-16mm, for example 13mm, 14mm, 15mm, or 16mm, preferably 13mm. Furthermore, the lengths of the second segment, the sixth segment, the ninth segment, and the fifteenth segment are all shorter than the lengths of any other segment. The appropriately long second segment 2, the sixth segment 6, the ninth segment 9, and the fifteenth segment 15 result in better overall structural strength and stability of the telescopic arm, while also facilitating processing.

[0045] In other embodiments, BS960E high-strength steel is used, with a corresponding plate thickness of 5mm and k = 15 / 3 to 16 / 3. In still other embodiments, HG785 high-strength steel is used, with a corresponding plate thickness of 3mm and k = 15 / 5 to 16 / 5.

[0046] More specifically, the angle between the second segment 2 and the first segment 1 and the third segment 3 is 130°-140°, for example, 130°, 135° or 140°, preferably 135°; the angle between the sixth segment 6 and the fifth segment 5 and the seventh segment 7 is 130°-140°, for example, 130°, 135° or 140°, preferably 135°; the angle between the eleventh segment 11 and the tenth segment 10 and the twelfth segment 12 is 130°-140°, for example, 130°, 135° or 140°, preferably 135°; The angles between the thirteenth segment 13 and the fourteenth segment 14 and the twelfth segment 12 are 130°-140°, for example, 130°, 135° or 140°, preferably 135°; the angles between the ninth segment 9 and the eighth segment 8 and the tenth segment 10 are 130°-140°, for example, 130°, 135° or 140°, preferably 135°; the angles between the fifteenth segment 15 and the fourteenth segment 14 and the sixteenth segment are 130°-140°, for example, 130°, 135° or 140°, preferably 135°. Appropriate angles between the segments result in better overall structural strength and stability of the telescopic boom, while also facilitating manufacturing.

[0047] In another embodiment, such as Figure 3 As shown, the fourth segment 4 is further bent into five sub-segments, including the first sub-segment 42, the second sub-segment 43, the third sub-segment 44, and the fifth sub-segment 45, which are connected sequentially between the third segment 3 and the fifth segment 5. The first sub-segment 45 and the fifth sub-segment 45 are on the same straight line. The third sub-segment 43 is farther away from the lower structure 200 than the first and fifth sub-segments 45. The angles between the second sub-segment 42 and the first and third sub-segments 43 are obtuse angles, and the angles between the fourth sub-segment 44 and the third and fifth sub-segments 43 are obtuse angles. That is, the cross-section of the upper structure 100 is an open 11-sided polygon, the cross-section of the lower structure 200 is an open 9-sided polygon, and the closed contour formed after the upper structure 100 and the lower structure 200 are joined is an 18-sided polygon.

[0048] In this embodiment, the processing method of the lower structure 200 is the same as above, and will not be described in detail here. The processing method of the upper structure 100 is exemplarily as follows: First, processing begins from the left side of a whole plate, that is, the left side of the whole plate is stamped by a stamping die to form two bends, corresponding to the obtuse angled first segment 1 and second segment 2, and the obtuse angled second segment 2 and third segment 3 mentioned above; then, a bending machine is used to perform a bend, corresponding to the vertical third segment 3 and first segment mentioned above; then, from left to right, the stamping die is used to perform two stampings in sequence, corresponding to the obtuse angled first segment mentioned above. The second segment 42, the obtuse-angled second segment 42 and third segment 43, the obtuse-angled third segment 43 and fourth segment 44, and the obtuse-angled fourth segment 44 and fifth segment 45 are then bent again, corresponding to the vertical fifth segment 45 and fifth segment 5; finally, the right side of the whole plate is placed in a stamping die for stamping to form two bends, corresponding to the obtuse-angled fifth segment 5 and sixth segment 6 and the obtuse-angled sixth segment 6 and seventh segment 7 mentioned above.

[0049] Specifically, the second segment 42 and the fourth segment 44 are of equal length, ranging from 13mm to 16mm, for example, 13mm, 14mm, 15mm or 16mm, preferably 14mm, and the lengths of the second segment and the fourth segment are both less than the lengths of any other segment; the angles between the second segment 42 and the first segment and the third segment 43 are 130° to 140°, for example, 130°, 135° or 140°, preferably 135°; the angles between the fourth segment 44 and the third segment 43 and the fifth segment 45 are 130° to 140°, for example, 130°, 135° or 140°, preferably 135°.

[0050] Whether it is a telescopic arm with a 14-sided or an 18-sided outline, the same stamping die can be used for processing the corresponding bending sections of the upper structure 100 and the lower structure 200. This results in good economic efficiency, low cost, and better overall structural consistency of the telescopic arm after forming.

[0051] This embodiment also provides a cantilever for an aerial work platform, which includes multiple sections of the aforementioned telescopic boom that are sequentially telescopically mounted to meet different working lengths and heights.

[0052] In one embodiment, such as Figure 4As shown, the aerial work platform boom includes a five-section telescopic boom with a 14-sided profile. Viewed from the cross-section of the five telescopic boom sections in the retracted state, the distance between any two adjacent first sections 1 is 7-9 mm, for example, 7 mm, 8 mm, or 9 mm, preferably 8 mm; the distance between any two adjacent seventh sections 7 is 7-9 mm, for example, 7 mm, 8 mm, or 9 mm, preferably 8 mm; the distance between any two adjacent fourth sections 4 in the inner fourth layer is 36-38 mm, for example, 36 mm, 37 mm, or 38 mm, preferably 37 mm; the distance between any two adjacent twelfth sections 12 in the inner fourth layer is 12-14 mm, for example, 12 mm, 13 mm, or 14 mm, preferably 13 mm; the distance between the outermost fourth section 4 and its adjacent fourth section 4 is 29-3 mm. The length of the outermost twelfth segment 12 is 1 mm, for example 29 mm, 30 mm or 31 mm, preferably 30 mm; the distance between the outermost twelfth segment 12 and its adjacent twelfth segment 12 is 17-19 mm, for example 17 mm, 18 mm or 19 mm, preferably 18 mm; the total length of the innermost first segment 1 and eighth segment 8 is 49-51 mm, for example 49 mm, 50 mm or 51 mm, preferably 50 mm; the length of the second segment 2 is 13-16 mm, for example 13 mm, 14 mm, 15 mm or 16 mm, preferably 14 mm; the length of the third segment 3 is 59-61 mm, for example 59 mm, 60 mm or 61 mm, preferably 60 mm; the length of the fourth segment 4 is 165-167 mm, for example 165 mm, 166 mm or 167 mm, preferably 166 mm. The lengths of each other layer and segment are set according to actual needs, ensuring that the telescopic arms between layers do not interfere with each other while achieving a high space utilization rate. These will not be listed individually here. It is understood that in actual production, the length of each segment is processed according to the preset processing length. However, due to processing errors, the actual length of each segment may differ from the preset processing length. For example, the preset processing length of the second segment 2 is 14mm, but the actual length after processing may be 14mm, 13mm, or 16mm. The same applies to other segments. To ensure that processing errors are within acceptable limits, the upper structure 100 and the lower structure 200 are processed sequentially from one side to the other as a whole panel to avoid large, uncorrectable dimensional errors in any single segment.

[0053] In another embodiment, such as Figure 5As shown, the aerial work platform boom includes three sections of 14-sided telescopic boom and four sections of 18-sided telescopic boom, which are telescopically fitted together from the inside out. Looking at the cross-section of the seven telescopic boom sections in the retracted state, the distance between any two adjacent first sections 1 is 9-11 mm, for example, 9 mm, 10 mm, or 11 mm, preferably 10 mm. The distance between any two adjacent seventh sections 7 is 9-11 mm, for example, 9 mm, 10 mm, or 11 mm, preferably 10 mm; the distance between the innermost fourth section 4 and its adjacent fourth section 4 is 33 mm-35 mm, for example, 33 mm, 34 mm, or 35 mm, preferably 34 mm; the distance between the fourth sections 4 in the second and third layers is 23 mm-25 mm, for example, 23 mm, 24 mm, or 25 mm, preferably 24 mm; the distance between the fourth sections 4 in the third layer and... The spacing between the first segments 41 of the fourth layer is 23mm-25mm, for example, 23mm, 24mm or 25mm, preferably 24mm; the spacing between the first segments 41 of the outermost two layers is 28mm-30mm, for example, 28mm, 29mm or 30mm, preferably 29mm; the spacing between the first segments 41 of each of the remaining adjacent layers is 23mm-25mm, for example, 23mm, 24mm or 25mm, preferably 24mm; the twelfth segment of the innermost two layers... The spacing between segments 12 is 13mm-16mm, for example, 13mm, 14mm, 15mm or 16mm, preferably 14mm; the spacing between the twelfth segments 12 in the outermost two layers is 19mm-21mm, for example, 19mm, 20mm or 21mm, preferably 20mm; the spacing between each adjacent pair of twelfth segments 12 in the remaining layers is 23mm-25mm, for example, 23mm, 24mm or 25mm, preferably 24mm; the spacing between the first segment 1 and the eighth segment in the innermost layer... The total length of segment 8 is 49-51mm, for example, 49mm, 50mm, or 51mm, preferably 50mm; the length of segment 2 is 13-16mm, for example, 13mm, 14mm, 15mm, or 16mm, preferably 14mm; the length of segment 3 is 59-61mm, for example, 59mm, 60mm, or 61mm, preferably 60mm; the length of segment 4 is 165-167mm, for example, 165mm, 166mm, or 167mm, preferably 166mm. The lengths of other segments in each layer are set according to actual needs, ensuring that the telescopic arms between layers do not interfere with each other, while achieving a large space utilization rate, and will not be listed here. Figure 5 The third segment 43 has two more folds on the outer four layers, which improves its strength and rigidity, but makes the manufacturing process more complex. Therefore, the inner three layers do not have folds, which simplifies the process and reduces costs.

[0054] Theoretically, the higher the fully extended boom of an aerial work platform, the higher the technological level. A greater extension height requires higher strength and rigidity, necessitating the use of high-strength steel. Therefore, this embodiment employs HG785 high-strength steel. Simultaneously, considering the lowest possible manufacturing cost for each telescopic boom section, more cross-sectional bends (more sides) are produced to meet the performance requirements of higher strength and better rigidity (less deformation). The inventors, through years of research, discovered that more sides in the telescopic boom cross-section result in better rigidity and strength, but better manufacturability must also be considered. Therefore… Figure 2 The aerial work platform boom shown in the diagram, viewed from the front, has the following structure: On the upper structure 100, two "N-folds" (the N-folds formed by segments 1, 2, and 3 on the left and segments 5, 6, and 7 on the right) are formed on both sides using a "one-step two-bend mold" (referred to as the first mold). Then, a "right-angle U-shaped bend mold" (referred to as the second mold) is used to form right angles between 3 / 4 and 4 / 5 of the boom in a single press. On the lower structure 200, two N-folds (the N-folds formed by segments 8, 9, and 10 on the left and segments 14, 15, and 16 on the right) are formed on both sides using a "one-step two-bend mold" (referred to as the first mold). Then, a "V-shaped bend mold" (referred to as the third mold) is used to form obtuse angles between 10 / 11 and 13 / 14 in two presses. Finally, an "obtuse-angle U-shaped bend mold" (referred to as the fourth mold) is used to form obtuse angles between 11 / 12 and 12 / 13 in a single press. This process continues... Figure 2 The telescopic arm with the best cross-section is the easiest to manufacture and has the best stiffness and strength. Figure 3 The aerial work platform boom shown in the diagram, viewed from the front of the drawing, has the following cross-section: Figure 2 Except for the fourth segment, which has two additional N-folds before the right-angle U-shaped bend (the N-folds formed by segments 41, 42, and 43 at the top of the diagram, and the N-folds formed by segments 43, 44, and 45), the structural processing methods of the remaining segments are the same. Figure 2 The contents shown are exactly the same, so it is easy to process and has good manufacturability. In summary, the telescopic boom section of the aerial work platform of this application is a combination of four basic elements: "N-fold", "right-angle U-fold", "obtuse-angle U-fold" and "V-fold". The most complex "N-fold" uses the same mold in all places, which ensures that the telescopic boom structure with optimal strength and rigidity (less deformation) can be obtained by using extremely convenient processing technology.

[0055] It should be noted that the aerial work platform boom provided in this embodiment not only has the two structures mentioned above, but can also be formed by telescopically attaching several aerial work platform booms with an 18-sided outline.

[0056] This embodiment also provides an aerial work platform vehicle, including the above-mentioned aerial work platform cantilever, which has better load-bearing capacity and better operational reliability.

[0057] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A telescopic boom for an aerial work platform, characterized in that, The upper structure (100) and the lower structure (200) are both left-right symmetrical structures; The upper structure (100) is an integrally formed plate structure, and the cross section of the upper structure (100) comprises first, second, third, fourth, fifth, sixth and seventh segments (1, 2, 3, 4, 5, 6, 7) connected in sequence, the first, third, fifth and seventh segments (1, 3, 5, 7) are parallel to each other, the first segment (1) is farther away from the symmetry line of the upper structure (100) than the third segment (3), the seventh segment (7) is farther away from the symmetry line of the upper structure (100) than the fifth segment (5), the third and fifth segments (3, 5) are perpendicular to the fourth segment (4), the included angle between the second segment (2) and the first segment (1) and the third segment (3) is obtuse, and the included angle between the sixth segment (6) and the fifth segment (5) and the seventh segment (7) is obtuse; The lower structure (200) is an integrally formed plate structure, and the cross section of the lower structure (200) comprises eighth, ninth, tenth, eleventh, twelfth, thirteenth, fourteenth and fifteenth and sixteenth segments (8, 9, 10, 11, 12, 13, 14, 15, 16) connected in sequence, the eighth segment (8) is connected with the first segment (1), the sixteenth segment (16) is connected with the seventh segment (7), the eighth, tenth, fourteenth and sixteenth segments (8, 10, 14, 16) are parallel to each other, the eighth segment (8) is farther away from the symmetry line of the lower structure (200) than the tenth segment (10), the sixteenth segment (16) is farther away from the symmetry line of the lower structure (200) than the fourteenth segment (14), the included angle between the eleventh segment (11) and the tenth segment (10) and the twelfth segment (12) is obtuse, the included angle between the thirteenth segment (13) and the fourteenth segment (14) and the twelfth segment (12) is obtuse, the included angle between the ninth segment (9) and the eighth segment (8) and the tenth segment (10) is obtuse, and the included angle between the fifteenth segment (15) and the fourteenth segment (14) and the sixteenth segment (16) is obtuse; The lengths of the second, sixth, ninth and fifteenth segments (2, 6, 9, 15) are equal and are k times the thickness of the corresponding plate, k is between 3 and 6, and the lengths of the second, sixth, ninth and fifteenth segments (2, 6, 9, 15) are less than the lengths of any other segments.

2. The high-altitude work truck telescoping boom of claim 1, wherein, The thickness of the plate corresponding to each segment of the cross section of the upper structure (100) and the lower structure (200) of the telescopic arm is 4 mm, and the lengths of the second, sixth, ninth and fifteenth segments (2, 6, 9, 15) are equal and are 13-16 mm.

3. The high-altitude work vehicle telescopic jib of claim 1, wherein, The included angle between the second segment (2) and the first segment (1) and the third segment (3) is 130-140°, and the included angle between the sixth segment (6) and the fifth segment (5) and the seventh segment (7) is 130-140°. The included angle between the eleventh segment (11) and the tenth segment (10) and the twelfth segment (12) is 130-140°, the included angle between the thirteenth segment (13) and the fourteenth segment (14) and the twelfth segment (12) is 130-140°, the included angle between the ninth segment (9) and the eighth segment (8) and the tenth segment (10) is 130-140°, and the included angle between the fifteenth segment (15) and the fourteenth segment (14) and the sixteenth segment (16) is 130-140°.

4. The high-altitude work vehicle boom of any of claims 1-3, wherein, The fourth segment (4) is further bent into five sub-segments, including the first sub-segment (41), the second sub-segment (42), the third sub-segment (43), the fourth sub-segment (44) and the fifth sub-segment (45) connected in turn between the third segment (3) and the fifth segment (5), the first sub-segment (41) and the fifth sub-segment (45) are located on the same straight line, the third sub-segment (43) is away from the first sub-segment (41) and the fifth sub-segment (45) compared to the lower structure (200), the included angle between the second sub-segment (42) and the first sub-segment (41) and the third sub-segment (43) is obtuse, and the included angle between the fourth sub-segment (44) and the third sub-segment (43) and the fifth sub-segment (45) is obtuse. The lengths of the second sub-segment (42) and the fourth sub-segment (44) are equal to the length of the second segment (2).

5. The high-altitude work vehicle telescopic jib of claim 4, wherein, The lengths of the second sub-segment (42) and the fourth sub-segment (44) are equal to 13-16mm.

6. The high-altitude work vehicle telescopic jib of claim 4, wherein, The included angle between the second sub-segment (42) and the first sub-segment (41) and the third sub-segment (43) is 130-140°, and the included angle between the fourth sub-segment (44) and the third sub-segment (43) and the fifth sub-segment (45) is 130-140°.

7. An aerial device boom for an aerial device, the aerial device boom comprising: The telescopic boom of the overhead working vehicle comprises five telescopic sleeves, and from the cross section of the five telescopic booms of the overhead working vehicle in the retracted state, the distance between each adjacent two first segments (1) is 7-9mm, the distance between each adjacent two seventh segments (7) is 7-9mm, the total length of the first segment (1) and the eighth segment (8) located in the innermost layer is 49-51mm, the length of the second segment (2) is 13-16mm, the length of the third segment (3) is 59-61mm, and the length of the fourth segment (4) is 165-167mm.

8. An aerial device boom for an aerial device, the aerial device boom comprising: The seven-section aerial work platform telescopic arm comprises three sections of the aerial work platform telescopic arm according to any one of claims 1-3 and four sections of the aerial work platform telescopic arm according to any one of claims 4-6, which are telescoped from inside to outside in sequence, and the distance between each adjacent two first sections (1) is 9-11 mm, the distance between each adjacent two seventh sections (7) is 9-11 mm, the total length of the first section (1) and the eighth section (8) located in the innermost layer is 49-51 mm, the length of the second section (2) is 13-16 mm, the length of the third section (3) is 59-61 mm, and the length of the fourth section (4) is 165-167 mm.

9. An aerial work platform, characterized in that The aerial work platform cantilever comprises the aerial work platform cantilever according to claim 7 or 8.

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