WO2023185528A1 - Hollowed-out boom segment, segmented type boom, and boom assembly - Google Patents

Abstract

The present invention relates to the field of boom structures. Disclosed are a hollowed-out boom segment, a segmented type boom, and a boom assembly. The hollowed-out boom segment comprises a hollowed-out boom segment main body and a plurality of reinforcing structures; a cavity is formed in the hollowed-out boom segment main body, the cavity is formed in a length direction of the hollowed-out boom segment main body, and the plurality of reinforcing structures are fixed in the cavity at intervals in the length direction of the hollowed-out boom segment main body; a plurality of first weight reduction holes and a plurality of second weight reduction holes are formed in the two opposite sides of the hollowed-out boom segment main body, and the first weight reduction holes and the second weight reduction holes are communicate with the cavity, the shape of each first weight reduction hole is different from that of each second weight reduction hole, and the plurality of first weight reduction holes and the plurality of second weight reduction holes are arranged in the length direction of the hollowed-out boom segment main body. According to the hollowed-out boom segment in the present invention, the problems of insufficient rigidity and easy instability can be solved, the stability is improved, and application requirements of different projects can be met.

Description

Hollow arm section, segmented arm and arm assembly

Cross-references to related applications

This application claims the rights and interests of Chinese patent application 202220708067.0 submitted on March 29, 2022, the contents of which are incorporated herein by reference.

Technical field

The invention relates to the technical field of boom structures, and in particular to a hollow arm section, a segmented boom and a boom assembly.

Background technique

As the main load-bearing component of engineering equipment, the boom structure has complex stresses. In addition to bearing bending moments, it also bears shear force, torque and other loads. Currently, the box-section beam structure is mainly used, and only the left and right flanks of the boom joints are used. The single-shaped hollow design of the plate does not take into account the complex working conditions of the arm joints during the actual application process, especially dynamic loads such as impact and vibration. Since only the left and right web plates are designed with a single-shaped hollow to reduce weight, the following will result One of the consequences: 1. When the hollow weight-reducing holes are designed to be larger, some local lateral stiffnesses will decrease more than those without hollows. At the same time, due to the complex and changeable construction environment of the boom joints, there are many unpredictable extreme working conditions, resulting in During the application process, the arm section sometimes becomes unstable partially or as a whole and becomes inoperable. 2. When the hollow weight-reducing holes are designed to be small, the weight-reducing effect is not obvious.

Contents of the invention

In view of the above-mentioned defects and shortcomings of the prior art, embodiments of the present invention provide a hollow arm section, a segmented arm frame and an arm assembly, which can solve or at least partially solve the above-mentioned problems, and ensure the durability of the arm section. Stiffness and stability, taking into account the needs of arm joint weight reduction and manufacturing, can meet the application needs of different projects.

In order to achieve the above object, the first aspect of the embodiment of the present invention provides a hollow arm section, which includes a hollow arm section main body and a plurality of reinforcing structures. The hollow arm section main body is provided with a cavity, and the cavity is arranged along the hollow arm section. The hollow arm section main body is arranged in the length direction, and a plurality of the reinforcing structures are fixed in the cavity at intervals along the length direction of the hollow arm section main body. Opposite sides of the hollow arm section main body are A plurality of first weight reduction holes and a plurality of second weight reduction holes are provided. The first weight reduction holes and each of the second weight reduction holes are connected with the cavity, and each of the first weight reduction holes The shape of is different from the shape of each of the second weight reduction holes, and a plurality of the first weight reduction holes and a plurality of the second weight reduction holes are arranged along the length direction of the hollow arm section body.

In an optional embodiment, a plurality of the first weight reduction holes and a plurality of the second weight reduction holes are combined into a plurality of weight reduction units, and the plurality of weight reduction units are along the hollow arm. The length direction of the segment main body is arranged in sequence, and each weight reduction unit includes at least one first weight reduction hole and at least one second weight reduction hole.

In an optional embodiment, the hollow arm sections include at least one of the following:

Each of the weight reduction units includes one first weight reduction hole and two second weight reduction holes, and the first weight reduction hole is provided between the two second weight reduction holes;

Each of the weight reduction units includes two first weight reduction holes and one second weight reduction hole, and the second weight reduction hole is provided between the two first weight reduction holes;

Each of the weight reduction units includes two first weight reduction holes and two second weight reduction holes, and the two second weight reduction holes are provided between the two first weight reduction holes;

Each of the weight reduction units includes two first weight reduction holes and three or more second weight reduction holes, and three or more second weight reduction holes are provided on two between the first weight-reducing holes.

In an optional embodiment, the hollow arm sections include at least one of the following:

The first weight reduction hole is a right-angled trapezoid, and the second weight reduction hole is an isosceles trapezoid;

The first weight-reducing hole is a right-angled triangle, and the second weight-reducing hole is an isosceles triangle or an equilateral triangle;

The first weight-reducing hole is triangular, and the second weight-reducing hole is quadrilateral or polygonal.

In an optional embodiment, two adjacent first weight reduction holes, two adjacent second weight reduction holes, and one of two adjacent first weight reduction holes and the second weight reduction hole are Spacer ribs are formed between them, and the reinforcing structure is connected to the spacer ribs.

In an optional embodiment, the hollow arm sections include at least one of the following:

The reinforcing structure includes a plurality of first reinforcing plates. The plurality of first reinforcing plates include at least one first welding edge and at least one first non-welding edge. The first reinforcing plates are welded by the first welding edge. On the inner wall of the hollow arm section main body, the first non-welded edge is spaced apart from the inner wall of the hollow arm section main body;

The reinforcing structure includes a plurality of first reinforcing plates, and the first reinforcing plates are bending plates;

The reinforcing structure includes a plurality of first reinforcing plates, and the plurality of first reinforcing plates are provided with third weight-reducing holes.

In an optional embodiment, the first reinforcing plate is a flat plate, and the first reinforcing plate is arranged along the radial direction of the hollow arm section body.

In an optional embodiment, the hollow arm sections include at least one of the following:

The reinforcing structure also includes a plurality of second reinforcing plates. The plurality of second reinforcing plates are fixed in the cavity at intervals along the length direction of the hollow arm section body. The plurality of second reinforcing plates are fixed in the cavity. The plate and the plurality of first reinforcing plates are spaced apart from each other, the shape of each second reinforcing plate is different from the shape of each of the first reinforcing plates, and the second reinforcing plate is connected to the spacer rib plate;

The reinforcing structure also includes a plurality of second reinforcing plates, and the plurality of second reinforcing plates are provided with fourth weight-reducing holes.

In an optional embodiment, the hollow arm sections include at least one of the following:

The second reinforcing plate includes a first bending part and a second bending part. The end of the first bending part is connected to the end of the second bending part. The first bending part is connected to the end of the second bending part. The angle between the second bending parts is an acute angle;

The second reinforcing plate includes a first bending part, a second bending part and a third bending part. The first bending part is connected to one end of the second bending part to form a first clamp. Angle, the other end of the second bending part is connected with the third bending part to form a second included angle, the first included angle and the second included angle are both obtuse angles, or the first included angle The angle is an acute angle, and the second included angle is an obtuse angle;

The second reinforcing plate includes a first bending part, a second bending part, a third bending part, a fourth bending part and a fifth bending part. The first bending part and the third bending part The bending portions are arranged in parallel, the second bending portion is fixedly connected between the first bending portion and the third bending portion, and the third bending portion and the fifth bending portion are arranged in parallel. , the fourth bending part is fixedly connected to the third bending part between the bending part and the fifth bending part.

In an optional embodiment, the hollow arm section main body includes a bottom plate, a top plate, a first side plate and a second side plate, the top plate is arranged opposite to the bottom plate, and the first side plate is arranged opposite to the bottom plate. The second side plates are arranged oppositely, and the first side plate and the second side plate are fixedly connected between the top plate and the bottom plate.

A second aspect of the embodiment of the present invention provides a segmented boom. At least one box-shaped arm section in the segmented boom is the above-mentioned hollow arm section, and at least two adjacent box-shaped arms are arranged The sections are respectively formed into a first box-shaped arm section and a second box-shaped arm section butted through a first joint, a second joint and a reinforced locking structure;

The first joint includes a first plate body fixed on the end opening of the first box-shaped arm section, a first plate hole formed through the first plate body, and a first plate body formed in the same direction as the first plate hole. A sleeve is arranged in axial alignment, and the second joint includes a second plate body fixed on the end opening of the second box-shaped arm section and a pin coaxially aligned with the second plate body, so The latch passes through the first plate hole and is removably plugged and fixed in the sleeve. The first plate body and the second plate body form a plate surface connection, and the reinforced locking structure is used to lock all the latch and the sleeve.

In an optional embodiment, the outer peripheral wall of the plug and the inner peripheral wall of the sleeve form a keyway fitting connection; and/or the outer peripheral wall of the plug and the inner peripheral wall of the first plate hole form a keyway fitting connection. Keyway mating connection.

In an optional embodiment, the first joint includes four first plate holes distributed at four corners of the first plate body and a hole corresponding to the four first plate holes. There are four sleeves arranged in a position, and the second joint includes four plug pins distributed at the four corners of the second plate body, and the four plug pins pass through them one by one. The four first plate holes are detachably plugged and fixed in the four sleeves.

A third aspect of the embodiment of the present invention provides a boom assembly, which includes a plurality of box-shaped booms that are hinged in sequence. At least one of the box-shaped booms is formed as a metal hollow boom. At least one of the box-shaped booms is The frame is formed into a fiber composite arm frame. The metal hollow arm frame is arranged near the head end of the arm frame assembly. The fiber composite arm frame is arranged near the end of the arm frame assembly. The fiber composite arm frame is arranged near the end of the arm frame assembly. The arm frame includes at least one fiber composite arm section, and the metal hollow arm frame includes at least one of the above-mentioned hollow arm sections formed as metal hollow arm sections.

In an optional embodiment, at least one of the box-shaped booms is formed as a solid web boom, and the solid web boom is arranged between the metal hollow boom and the fiber composite boom.

In an optional embodiment, the fiber composite boom includes a hinge hole formed on the web and a sleeve sleeved in the hinge hole. The sleeve includes a sleeve body and a sleeve extending from the hinge hole. An annular flange is formed by radially protruding outward at one end of the sleeve body. The annular flange is in contact with the peripheral portion of the hinge hole. The outer peripheral wall surface of the sleeve body is formed to limit the position of the sleeve body. A limiting profile that rotates relative to the hinge hole.

The hollow arm section of the present invention is provided with first weight reduction holes and second weight reduction holes with different shapes on both sides of the hollow arm section main body, and the first weight reduction holes and the second weight reduction holes can be freely combined for arrangement. Cloth can not only meet the needs of different engineering applications, but also solve the problems of insufficient stiffness and easy instability in existing hollow arm joints. The combination of the two shapes of holes not only takes into account the convenience of manufacturing, but also fully Consideration is given to stiffness and stability around the weight relief holes. In addition, the cavity in the main body of the hollow arm section is also provided with a first reinforcing plate, which can increase the overall structural strength of the hollow arm section, greatly improve the stability of the hollow arm section, and prevent it from breaking easily.

Other features and advantages of the present invention will be described in detail in the detailed description that follows.

Description of drawings

The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the following specific embodiments, but do not constitute a limitation of the present invention. In the attached picture:

Figure 1 is a schematic structural diagram of the hollow arm section of the present invention;

Figure 2 is a partially disassembled structural schematic diagram of the hollow arm section of the present invention;

Figure 3 is a schematic structural diagram of one combination of the weight reduction unit of the present invention;

Figure 4 is a schematic structural diagram of the second combination mode of the weight reduction unit of the present invention;

Figure 5 is a schematic structural diagram of three combinations of the weight reduction unit of the present invention;

Figure 6 is a schematic front structural view of an embodiment of the hollow arm section of the present invention;

Figure 7 is a schematic front structural view of an embodiment of the second reinforcing plate of the present invention;

Figure 8 is an exploded view of a segmented boom in a specific embodiment of the present invention;

Figure 9 is a schematic diagram of a first joint in a specific embodiment of the present invention;

Figure 10 is a schematic diagram of the first joint in Figure 9 from another perspective;

Figure 11 is a schematic diagram of a second joint in a specific embodiment of the present invention;

Figure 12 is a schematic diagram of another second joint in a specific embodiment of the present invention;

Figure 13 is an exploded view of the second joint in Figure 12;

Figures 14 and 15 combine to show a boom assembly in a specific embodiment of the present invention. In Figure 14, from left to right, there are a metal hollow boom, a metal hollow boom and a solid belly boom. In Figure 15, each The booms are all fiber composite booms, and the left end of the leftmost fiber composite boom in Figure 15 is hinged with the right end of the solid belly boom in Figure 14;

Figure 16 is a schematic diagram of a fiber composite boom in a specific embodiment of the present invention;

Figure 17 is a partial cross-sectional view A-A of Figure 16;

Figure 18 is a schematic diagram of the bushing in Figure 17.

Detailed ways

Specific implementation modes of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific implementations described here are only used to illustrate and explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention.

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other.

In the embodiments of the present invention, unless otherwise stated, the directional words used such as "up, down, top, bottom" usually refer to the direction shown in the drawings or refer to vertical, vertical or vertical directions. Words used to describe the positional relationship between components in the direction of gravity.

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

Figure 1 is a schematic structural diagram of the hollow arm section of the present invention. Figure 2 is a partially disassembled structural schematic diagram of the hollow arm section of the present invention. As shown in Figures 1 and 2, the hollow arm section includes a hollow arm section main body 11 and a plurality of Reinforced structure, hollow arm section main body 11 is provided with a cavity 101. The cavity 101 is arranged along the length direction of the hollow arm section main body 11. A plurality of reinforcing structures are fixed in the cavity 101 at intervals along the length direction of the hollow arm section main body 11. Opposite sides of the hollow arm section main body 11 Each is provided with a plurality of first weight reduction holes 102 and a plurality of second weight reduction holes 103. The first weight reduction holes 102 and each second weight reduction hole 103 are all connected with the cavity 101. Each first weight reduction hole 102 has a The shape is different from the shape of each second weight reduction hole 103. The plurality of first weight reduction holes 102 and the plurality of second weight reduction holes 103 are arranged along the length direction of the hollow arm section main body 11.

The hollow arm section body 11 of the hollow arm section of the present invention is provided with first weight reduction holes 102 and second weight reduction holes 103 with different shapes on both sides, and between the first weight reduction hole 102 and the second weight reduction hole 103 They can be combined and arranged at will, which can not only meet the needs of different engineering applications, but also solve the problems of insufficient stiffness and easy instability in the existing hollow arm joints. The combination of the two shapes of holes not only takes into account the manufacturing Convenience, and full consideration of the stiffness and stability around the weight-reducing hole. In addition, the cavity 101 in the main body 11 of the hollow arm section is also provided with multiple reinforcing structures, which can increase the overall structural strength of the hollow arm section, greatly improve the stability of the hollow arm section, and prevent it from breaking easily.

Further, the hollow arm section main body 11 includes a bottom plate 113, a top plate 112, a first side plate 114 and a second side plate 115. The top plate 112 is arranged opposite to the bottom plate 113, and the first side plate 114 and the third side plate 114 are arranged oppositely. Two side plates 115 are arranged oppositely, and the first side plate 114 and the second side plate 115 are fixedly connected between the top plate 112 and the bottom plate 113 . In this embodiment, the top plate 112 and the bottom plate 113 are arranged in parallel, the first side plate 114 and the second side plate 115 are fixedly connected between the top plate 112 and the bottom plate 113, and the first weight reduction hole 102 and the second weight reduction hole 103 are provided. on the first side plate 114 and/or the second side plate 115 .

Further, a plurality of first weight reduction holes 102 and a plurality of second weight reduction holes 103 are combined to form a plurality of weight reduction units 104. The plurality of weight reduction units 104 are arranged in sequence along the length direction of the hollow arm section main body 11, each The weight reduction unit 104 includes at least one first weight reduction hole 102 and at least one second weight reduction hole 103 . For example, when each weight reduction unit 104 includes a first weight reduction hole 102 and a second weight reduction hole 103, the first weight reduction hole 102 and the second weight reduction hole 103 are arranged at cross intervals; when each weight reduction unit 104 includes When there is one first weight reduction hole 102 and two second weight reduction holes 103, the first weight reduction hole 102 is provided between the two second weight reduction holes 103; Figure 3 is one of the weight reduction units 104 of the present invention. The structural schematic diagram of the combination is shown in Figure 3. When each weight reduction unit includes two first weight reduction holes 102 and one second weight reduction hole 103, the second weight reduction hole 103 is provided between the two first weight reduction holes. 102; Figure 4 is a schematic structural diagram of the second combination mode of the weight reduction unit of the present invention. As shown in Figure 4, each weight reduction unit 104 includes two first weight reduction holes 102 and two second weight reduction holes. 103, two second weight reduction holes 103 are provided between the two first weight reduction holes 102; Figure 5 is a structural schematic diagram of three combinations of the weight reduction unit of the present invention. As shown in Figure 5, each weight reduction hole The unit 104 includes two first weight reduction holes 102 and three or more second weight reduction holes 103. The three or more second weight reduction holes 103 are provided between the two first weight reduction holes 102. The above-mentioned number or arrangement of the first weight-reducing holes 102 and the second weight-reducing holes 103 is only an example, and there are other quantities and arrangements that are not listed here.

Further, the shape of the first weight-reducing hole 102 is, for example, a right-angled trapezoid, and the second weight-reducing hole 103 is an isosceles trapezoid; or the first weight-reducing hole 102 is a right-angled triangle, and the second weight-reducing hole 103 is an isosceles triangle or an isosceles triangle. side triangle; or the first weight reduction hole 102 is a triangle, and the second weight reduction hole 103 is a quadrilateral or polygon; the shapes between the first weight reduction hole 102 and the second weight reduction hole 103 can be arbitrarily combined or replaced. It should be noted that Yes, the shape of the first weight reduction hole 102 and the second weight reduction hole 103 does not distinguish between the positive and negative shapes. For example, when the first weight reduction hole 102 is a triangle, the upright triangle and the inverted triangle are both defined as the first weight reduction hole 102; For another example, the first weight reduction hole 102 is a right-angled ladder When the right-angled trapezoid is shaped, the right-angled side of the right-angled trapezoid is regarded as the first weight-reducing hole 102 on the left or right side, and the right-angled trapezoid is also regarded as the first weight-reducing hole 102 when it is upright or inverted.

Further, the reinforcing structure includes a first reinforcing plate 12. The first reinforcing plate 12 includes at least a first welding edge and at least a first non-welding edge. The first reinforcing plate 12 is welded to the hollow arm section main body 11 through the first welding edge. On the inner wall of the hollow arm section, the first non-welded edge is spaced apart from the inner wall of the hollow arm section body 11 . In this embodiment, the first reinforcing plate 12 includes one first welded edge and three first non-welded edges. The first welded edge can be connected with the top plate 112, the bottom plate 113, the first side plate 114 or the second side plate 115. Welding; when the first reinforcing plate 12 includes two first welding edges and two first non-welding edges, the first welding edge is welded to the top plate 112 and the bottom plate 113, or the first welding edge is welded to the first side plate 114 and the first side plate 114. The second side plate 115; when the first reinforcing plate 12 includes three first welding edges and one non-first welding edge, the non-first welding edge can be connected with the top plate 112, the bottom plate 113, the first side plate 114 and the second side plate 115. One of the plates 115 is spaced apart, and the other three plates are all welded; the above three welding methods can reduce the welding process, avoid stress concentration, and save time and cost.

Further, a spacing rib 111 is formed between two adjacent first weight reduction holes 102, two adjacent second weight reduction holes 103, and between adjacent first weight reduction holes 102 and second weight reduction holes 103. A reinforcing plate 12 is connected to the spacer rib plate 111 . The first reinforcing plate 12 is a flat plate or a bent plate. The first reinforcing plate 12 is arranged along the radial direction of the hollow arm section main body 11 . In this embodiment, the first reinforcing plate 12 is arranged perpendicularly to the top plate 112 and the bottom plate 113. A third weight-reducing hole is provided in the middle of the first reinforcing plate 12. The third weight-reducing hole is, for example, triangular or rectangular, but is not in the shape of a triangle or a rectangle. This is the limit.

Further, the reinforcing structure also includes a plurality of second reinforcing plates 13. The plurality of second reinforcing plates 13 are fixed in the cavity 101 at intervals along the length direction of the hollow arm section body 11. The plurality of second reinforcing plates 13 are connected to the cavity 101. A plurality of first reinforcing plates 12 are spaced apart from each other. The shape of each second reinforcing plate 13 is different from that of each first reinforcing plate 12. The second reinforcing plates 13 are connected to the spacing ribs 111 to increase the structural strength of the hollow arm section. In this embodiment, when the second reinforcing plate 13 includes a first bending part 131 and a second bending part 132, and the end of the first bending part 131 is connected to the end of the second bending part 132, the first The angle between the bending portion 131 and the second bending portion 132 is an acute angle, that is, the second reinforcing plate 13 is arranged in a V shape; the second reinforcing plate 13 is provided with a fourth weight-reducing hole 105. The fourth weight-reducing hole 105 is, for example, a triangle or a rectangle, but is not limited thereto.

Figure 6 is a schematic front structural view of an embodiment of the hollow arm section of the present invention. As shown in Figure 6, in another preferred embodiment, the second reinforcing plate 13 includes a first bending portion 131, a second bending portion 131, and a second bending portion 131. The bending portion 132 and the third bending portion 133 , one end of the first bending portion 131 and the second bending portion 132 are connected to form a first included angle 13 a , and the other end of the second bending portion 132 is connected to the third bending portion 133 The connection forms a second included angle 13b, the first included angle 13a and the second included angle 13b are both obtuse angles, or the first included angle 13a is an acute angle and the second included angle 13b is an obtuse angle.

Figure 7 is a schematic front structural view of an embodiment of the second reinforcing plate of the present invention. As shown in Figure 7, in another preferred embodiment, the second reinforcing plate 13 includes a first bending portion 131, a second The bending part 132, the third bending part 133, the fourth bending part 134 and the fifth bending part 135, the first bending part 131 and the third bending part 133 are arranged in parallel, and the second bending part 132 is fixedly connected. Between the first bending part 131 and the third bending part 133, the third bending part 133 and the fifth bending part 135 are arranged in parallel, and the fourth bending part 134 is fixedly connected to the third bending part 133 and the fifth bending part 135. between five bending parts 135.

It should be noted that the bent portion of the second reinforcing plate 13 can be adjusted according to the position of the partition plate, and the first reinforcing plate 12 and the third The two reinforcing plates 13 can be freely combined.

Further, the second reinforcing plate 13 includes one second welding edge and three second non-welding edges, and the second welding edge can be welded to the top plate 112, the bottom plate 113, the first side plate 114 or the second side plate 115; when When the second reinforcing plate 13 includes two second welded edges and two second non-welded edges, the second welded edges are welded to the top plate 112 and the bottom plate 113, or the second welded edges are welded to the first side plate 114 and the second side. Plate 115; when the second reinforcing plate 13 includes three second welding edges and one non-second welding edge, the non-second welding edge can be connected with the top plate 112, the bottom plate 113, the first side plate 114 and the second side plate 115. One of the plates is set at intervals, and the other three plates are welded; the above three welding methods can reduce the welding process, avoid stress concentration, and save time and costs.

The hollow arm joint of the present invention is mainly used in fire-fighting machinery, sanitation machinery, concrete machinery, etc., but is not limited thereto.

As shown in Figures 8 to 13, the present invention also provides a segmented boom, which can be used in engineering machinery such as concrete pump trucks. The segmented boom includes a plurality of box-shaped arm sections, at least one of which The box-shaped arm sections can be the above-mentioned hollow arm sections, and the remaining box-shaped arm sections can be hollow arm sections or non-hollow arm sections (that is, arm sections without weight-reducing holes on the web).

Regardless of the type of box arm section, in the segmented boom of the present invention, there are at least two adjacent box arm sections formed into a first box arm section 210 and a second box arm section respectively. 211, it is defined here that the first box-shaped arm section 210 and the second box-shaped arm section 211 at least need to form end butt joints through the first joint and the second joint specially designed in the present invention. In other words, in the segmented boom of the present invention, at least two adjacent box-shaped boom sections with butt ends are formed through the first joint and the second joint, one of which is defined as the first box-shaped boom section 210 , the other is defined as the second box-shaped arm section 211. For example, in FIG. 8 , when the middle box-shaped arm section is formed into the first box-shaped arm section 210 , the two adjacent box-shaped arm sections on its left and right sides are formed relative to the first box-shaped arm section 210 The second box-type arm section 211. In addition, the box-shaped arm section is composed of a plurality of circumferential enclosure plates that are sequentially enclosed in the circumferential direction. The cross-section of the arm section is usually rectangular, and the end of the arm section is correspondingly formed with an end opening.

The first joint includes a first plate body 21 fixed on an open end of the first box-shaped arm section 210, a first plate hole 22 formed through the first plate body 21, and a first plate hole 22 aligned and perpendicular to the first plate hole 22. The sleeve 23 extends from the plate surface of the first plate body 21 (that is, the sleeve 23 is coaxially aligned with the first plate hole 22), so that the first joint serves as the end joint of the first box-shaped arm section 210. In the assembled state of the first box-shaped arm section 210 and the second box-shaped arm section 211, the sleeve 23 extends into the first box-shaped arm section 210, and between the first box-shaped arm section 210 and the second box-shaped arm section 211 Before assembly, the present invention does not limit whether the sleeve 23 and the first plate body 21 are fixed to each other.

The second joint includes a second plate body 24 fixed on the open end of the second box-shaped arm section 211 and a plug 25 extending perpendicularly to the surface of the second plate body 24, so that the second joint serves as a second box-shaped arm. Section 211 end fitting. In the assembled state of the first box-shaped arm section 210 and the second box-shaped arm section 211, the latch 25 is located outside the end opening of the second box-shaped arm section 211, and the latch 25 passes through the first plate hole 22 and is detachable. The ground is plugged and fixed in the sleeve 23, and at the same time, the first plate body 21 and the second plate body 24 form a plate face connection, so that the first box-shaped arm section 210 and the second box-shaped arm section 211 form an end-butt connection. Before the first box-shaped arm section 210 and the second box-shaped arm section 211 are assembled, the present invention does not limit whether the latch 25 and the second plate body 24 are fixed to each other.

Based on the above arrangement, in the segmented boom of the present invention, the first box-shaped arm section 210 and the second box-shaped arm section 211 are detachably assembled by connecting the first joint and the second joint with extremely high reliability. Especially for the boom with changeable postures, the plug 25 in the second joint and the sleeve 23 in the first joint can be plugged and matched, so that the two can jointly bear the shear force and bending moment exerted on the boom. , torque and other alternating loads, while the segmented booms in the existing technology usually use ordinary flanges and bolts to realize the connection between arm sections, especially Especially when bearing shear force, the bolts are easy to break, causing the boom to become unstable. Therefore, compared with the existing technology, the solution of the present invention can greatly improve the stress performance of the segmented boom, thereby effectively improving the stability of the segmented boom. The operation stability is improved and the risk of deformation and damage is reduced. At the same time, the disassembly and assembly of the first joint and the second joint are simple, which can effectively improve the disassembly and assembly efficiency of the first box-shaped arm section 210 and the second box-shaped arm section 211. Especially when manufacturing the long-meter boom, the long-meter boom can be manufactured in sections and then assembled, which greatly reduces the manufacturing difficulty. When a section of the segmented boom is damaged or reaches the set use time, or the remaining life is not expected to be long, only this section of the boom can be removed for repair or replacement, which greatly shortens the re-installation of the segmented boom. The time required to put it into use. Moreover, in the assembled state of the first box-shaped arm section 210 and the second box-shaped arm section 211, the sleeve 23 extends into the first box-shaped arm section 210, and the latch 25 is inserted into the sleeve 23, that is, the sleeve 23 and The pins 25 are all located in the first box-type arm section 210, which can be waterproof and rust-proof, ensuring the strength of the plug-in fit under long-term use of the boom, and greatly extending the service life of the first joint and the second joint.

In one embodiment, by disposing a plurality of pins 25 and a plurality of sleeves 23 that are plugged and fixed in one-to-one correspondence between the first box-shaped arm section 210 and the second box-shaped arm section 211, it is helpful to further strengthen the connection. reliability. For example, corresponding to a common box-shaped arm section with a rectangular cross-section, the first joint may include four first plate holes 22 distributed at four corners of the first plate body 21 and four first plate holes 22 With the four sleeves 23 arranged in one-to-one alignment, the second joint may include four pins 25 distributed at the four corners of the second plate body 24. The four pins 25 pass through the four first ones in one-to-one correspondence. The plate holes 22 are detachably plugged and fixed in four sleeves 23 . In this way, a stable connection can be formed at the four corners of the docking position of the first box-shaped arm section 210 and the second box-shaped arm section 211, so that the segmented boom can withstand alternating shear forces, bending moments, torques, etc. The load capacity is further enhanced.

In one embodiment, the outer peripheral wall of the plug 25 and the inner peripheral wall of the sleeve 23 form a keyway fitting connection. For example, the outer peripheral wall of the latch 25 is formed with a plurality of latch keys arranged at intervals along the circumferential direction, and the inner peripheral wall of the sleeve 23 is formed with a plurality of sleeve keyways corresponding to the plurality of latch keys. In the latch 25 When plugged into the sleeve 23, through the one-to-one matching of multiple latch keys and multiple sleeve keyways, the latch 25 and the sleeve 23 achieve circumferential limiting, which can prevent relative rotation and improve connection stability. , using the mutually matched latch key and sleeve keyway, the ability to withstand the torque load imposed on the boom can be greatly improved.

In one embodiment, the outer peripheral wall of the plug 25 and the inner peripheral wall of the first plate hole 22 may also form a keyway fitting connection. For example, in the case where the outer peripheral wall of the latch 25 is formed with a plurality of latch keys arranged at intervals along the circumferential direction, the inner peripheral wall of the first plate hole 22 is formed with a plurality of plates arranged in one-to-one correspondence with the plurality of latch keys. hole keyway, in this way, when the latch 25 is connected to the first plate hole 22, through the one-to-one matching of the plurality of latch keys and the plurality of plate hole keyways, the latch 25 and the first plate body 21 achieve circumferential limiting, which can Prevent relative rotation and improve connection stability. Similarly, the use of matching latch keys and plate hole keyways can also improve the ability to withstand torque loads imposed on the boom.

Preferably, the plurality of keys and grooves are evenly distributed along the circumferential direction.

It should be noted that, in an optional embodiment, the connection between the first box-shaped arm section 210 and the second box-shaped arm section 211 can be achieved through the plug-fitting of the pin 25 and the sleeve 23, such as The pin 25 is interference-fitted to the sleeve 23 . However, in order to further improve the connection reliability and the convenience of joint disassembly, the segmented boom of the present invention can also be provided with a reinforced locking structure, and the reinforced locking structure is used to lock the latch 25 and the sleeve 23 with each other to avoid extreme operations. Under working conditions (for example, when the load borne by the boom suddenly far exceeds the design value) the latch 25 and the sleeve 23 become loose, causing the boom to become unstable.

As an embodiment of the reinforced locking structure, the latch 25 is formed with a latch hollow cavity, and the reinforced locking structure includes a locking pin. The locking of the first joint and the second joint can be achieved by interference insertion of the tightening pin in the latch hollow cavity, or by screw-fitting the outer peripheral wall of the locking pin with the inner peripheral wall of the latch hollow cavity.

In one embodiment, the locking pin includes a locking pin shaft body 28 whose inner and outer ends are respectively formed into the inner end of the shaft and the outer end of the shaft, and a locking pin cap body 29 fixedly connected to the outer end of the shaft. The inner end of the shaft is detachable. The locking pin cap 29 is in axial limited contact with the outer end surface of the sleeve 23 when the plug 25 is inserted into the sleeve 23 . Therefore, the locking pin shaft body 28 can pass through the sleeve 23 and the latch 25 from the inner end of the shaft until the locking pin cap body 29 contacts the outer end surface of the sleeve 23, thereby locking and limiting the sleeve 23. Between the latch 25 and the locking pin cap body 29, the locking state of the latch 25 and the sleeve 23 is ensured. When the locking pin shaft body 28 is threaded with the latch hollow cavity, a bolt can be used as the locking pin. At this time, the nut of the bolt is the locking pin cap body 29.

When the latch 25 is not formed with a latch hollow cavity, a locking pin of another installation method can also be used to lock the latch 25 and the sleeve 23 . For example, two locking holes aligned with each other are respectively opened on the peripheral walls of the latch 25 and the sleeve 23, and the two locking holes are connected by a locking pin, so that the latch 25 and the sleeve 23 can also be locked.

In an optional embodiment, when the latch 25 is not formed with a latch hollow cavity, the first joint and the second joint can also be connected by providing external threads on the outer peripheral wall of the latch 25 to cooperate with the locking nut. Connector locks. Specifically, when the latch 25 is inserted into the sleeve 23 , one end of the latch 25 extends out of the sleeve 23 , and the locking nut cooperates with the external thread at the end of the latch 25 .

In order to facilitate the installation of the locking pin, the peripheral wall of the first box-shaped arm section 210 can be formed with a disassembly and assembly escape opening 210a connected with the end opening of the first box-shaped arm section 210 to prevent the locking pin from being disassembled and assembled. The position of the opening 210a is as close as possible to the end opening of the first box-shaped arm section 210, so that when the end opening of the first box-shaped arm section 210 is covered by the first plate body 21, the operator can avoid disassembly and assembly. The opening 210a touches the sleeve 23 extending into the first box-shaped arm section 210, thereby facilitating the disassembly and assembly of the locking pin.

In one embodiment, the two ends of the sleeve 23 are respectively formed into a sleeve outer end and a sleeve inner end, and the sleeve inner end forms a detachable connection with the first plate body 21 . Specifically, the inner end of the sleeve can be detachably plugged and fixed in the first plate hole 22, or the end surface of the inner end of the sleeve can be directly connected to the plate surface of the first plate body 21, whether by plugging or plugging. It is direct docking. In the docking state of the first joint and the second joint, the second joint can simultaneously connect and fix the first plate body 21 and the sleeve 23 through the pin 25. Overall, the sleeve 23 and the first plate body 21 are configured to be detachably connected, so that the sleeve 23 can be replaced, repaired, etc. according to the actual situation, thereby improving the versatility of the first joint, for example, it can be used for joints with different shapes. The sleeve 23 at the inner end of the sleeve can be replaced adaptively according to the size of the sleeve, and the convenience is high.

In one embodiment, the inner end of the sleeve 23 is interference-fitted into the first plate hole 22 . Specifically, the outer diameter of the inner end of the sleeve can be set to be larger than the maximum hole diameter of the first plate hole 22. When the inner end of the sleeve is inserted into the first plate hole 22, the inner end of the sleeve and the first plate hole 22 can be connected to each other. The interference fit can achieve a fixed connection between the sleeve 23 and the first plate body 21, thereby enhancing the strength and stability of the connection between the first box-shaped arm section 210 and the second box-shaped arm section 211.

Further, in order to enhance the effectiveness of the connection between the first joint and the second joint, the outer diameter of the sleeve 23 at each cross-sectional position between the inner end of the sleeve and the outer end of the sleeve is larger than the outer diameter of the inner end of the sleeve. Specifically, the outer diameter of the sleeve 23 gradually increases from the inner end of the sleeve to the outer end of the sleeve, thereby limiting the relative position of the sleeve 23 and the first plate body 21 to ensure that the first plate body 21 cannot move forward after insertion. The outer end of the sleeve moves in the direction. In other embodiments, the sleeve 23 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, so that The large outer diameter section limits the displacement of the first plate body 21 . In addition, the large outer diameter Both the segment and the small outer diameter segment can be configured to gradually increase in outer diameter, thereby enhancing the smoothness of the connection operation between the sleeve 23 and the first plate body 21 .

In one embodiment, the end surface of the inner end of the sleeve is butted with the plate surface of the first plate body 21 at the hole peripheral position of the first plate hole 22. That is to say, the outer diameter of the inner end of the sleeve can be set to be larger than the first plate hole 22. The maximum diameter of the plate hole 22, when the inner end of the sleeve is not inserted into the first plate hole 22, and the first plate body 21 is pressed through the second joint, the end surface of the inner end of the sleeve can be aligned with the first plate hole 22. The plate surfaces at the periphery of the hole form a butt joint, and at the same time, the end surface of the inner end of the sleeve can limit the first plate body 21 to ensure that the first plate body 21 does not move toward the outer end of the sleeve.

In one embodiment, the diameter of the first plate hole 22 is the same as the maximum outer diameter of the pin 25 corresponding to the first plate hole 22 . Therefore, in the butt state of the first joint and the second joint, the outer peripheral wall of the plug 25 can abut the inner peripheral wall of the first plate hole 22 , and the limiting effect of the first plate body 21 on the plug 25 can prevent the two sides from interfering with each other. The relative displacement occurs along the radial direction, which improves the stability of the connection between the first joint and the second joint and reduces the risk of damage to the boom.

In one embodiment, the two ends of the sleeve 23 are respectively formed into a sleeve outer end and a sleeve inner end, and the sleeve inner end is fixedly connected to the first plate body 21 in a non-detachable manner. For example, the end surface of the inner end of the sleeve can be fixedly connected to the surface of the first plate body 21 through welding or other processing methods, or the sleeve 23 and the first plate body 21 can be integrally formed through integrated stamping, 3D printing, etc., so that The connection stability and load capacity of the sleeve 23 and the first plate body 21 can be enhanced.

In one embodiment, the two ends of the latch 25 are respectively formed into an outer end and an inner end of the latch, and the inner end of the latch forms a detachable connection with the second plate body 24 . For example, the second plate body 24 can be formed with a plate hole that is an interference fit with the inner end of the latch, so that the latch 25 can be plugged and fixed to the second plate body 24. In addition, a detachable locking structure can also be provided to connect the inner end of the latch with the latch. The second plate body 24 is locked. For this reason, the present invention does not limit the detachable connection method between the inner end of the latch and the second plate body 24. Overall, the detachable connection between the latch 25 and the second plate body 24 can enhance the second plate body 24. The versatility of the joint also facilitates operations such as replacement and maintenance of the plug 25, thereby improving the convenience of joint assembly.

In order to enhance the stability of the connection, the second joint also includes a limiting plate 26. The latch 25 is vertically fixedly connected to the limiting plate 26 through the inner end of the latch. The connection method can be welding, integrated stamping processing, etc., the second plate body 24 A second plate hole 27 is formed through the upper part. In the butt state of the first joint and the second joint, the latch 25 is disposed through the second plate hole 27 , and the limiting plate 26 forms a plate surface connection with the second plate body 24 . Therefore, the latch 25 can be limited by the limiting plate 26 , effectively preventing the inner end of the latch from escaping from the second plate hole 27 , thereby enhancing the stability of the connection process.

In one embodiment, the outer peripheral wall of the plug 25 and the inner peripheral wall of the second plate hole 27 form a keyway fitting connection. Specifically, the outer peripheral wall of the latch 25 forms a protruding latch key along the circumferential direction, and the inner peripheral wall of the second plate hole 27 forms a plate hole keyway corresponding to the latch key in the circumferential direction. Therefore, when the latch 25 is inserted into the first When the second plate hole 27 is in the state, the latch key 25 and the second plate body 24 can be limited by the cooperation of the latch key and the plate hole keyway, preventing the latch 25 and the second plate body 24 from relative rotation, thereby improving the stability of the connection. properties and enhance the joint assembly's ability to withstand torque loads.

In one embodiment, the two ends of the latch 25 are respectively formed into an outer end and an inner end of the latch, and the inner end of the latch is fixedly connected to the second plate body 24 in a non-detachable manner. For example, the end surface of the inner end of the latch can be fixedly connected to the surface of the second plate body 24 through welding or other processing methods, or the latch 25 and the second plate body 24 can be integrally formed through integrated stamping, 3D printing, etc., so that Strengthen the connection stability and load capacity of the plug 25 and the second plate body 24.

On the other hand, as shown in Figures 14 to 18, the present invention also provides a boom assembly, which includes a plurality of box-shaped booms that are hinged in sequence, and each box-shaped boom includes at least A box arm section. When there is only one box boom section in the box boom, the box boom section itself is equivalent to the box boom. When there are multiple box boom sections in the box boom, the box boom is equivalent to forming It is a segmented boom, but unlike the aforementioned segmented boom, there is no restriction on whether the boom is provided with a first joint, a second joint, a reinforced locking structure, etc.

In order to reduce the weight of the boom assembly as much as possible, in the boom assembly of the present invention, at least one box-shaped boom is configured as a metal hollow boom 31, and at least one box-shaped boom is configured as a fiber composite boom 34, and arrange the metal hollow arm 31 close to the head end of the arm assembly (for example, the end close to the turntable), and arrange the fiber composite arm 34 close to the end of the arm assembly (for example, the end close to the distribution point).

Before elaborating on the basis for the above-mentioned lightweight design, some technical terms in the boom assembly of the present invention need to be explained first.

First of all, the metal hollow arm 31 refers to an arm equipped with at least one metal hollow arm section (that is, a metal arm section with a weight-reducing hole on the web). When there is only one box-shaped arm section in the metal hollow arm 31, the box-shaped arm section can only be a metal hollow arm section, and at this time the metal hollow arm section itself is equivalent to the metal hollow arm 31; when the metal hollow arm When there are multiple box arm joints in 31, there is no restriction on other types of box arm joints, but at least one box arm joint is guaranteed to be a metal hollow arm joint, while other types of box arm joints can be, for example, solid belly Boom joints (i.e. metal boom joints without weight-reducing holes on the web), but cannot be fiber composite boom joints (see the definition below). Obviously, when the hollow arm sections with various combination arrangements of weight-reducing holes are made of metal materials, they can be disposed in the metal hollow arm frame 31 as metal hollow arm sections.

In addition, the fiber composite arm 34 refers to an arm equipped with at least one fiber composite arm section (that is, an arm section mainly made of fiber composite materials, and the arm section may contain a small part of other materials, such as metal, etc.) shelf. When there is only one box-shaped arm section in the fiber composite boom 34, the box-shaped boom section can only be a fiber composite boom section, and at this time the fiber composite boom section itself is equivalent to the fiber composite boom 34; when When there are multiple box-shaped arm sections in the fiber composite boom 34, there is no limit to other types of box-shaped boom sections, but at least one box-shaped boom section is guaranteed to be a fiber composite boom section, and other types of box-shaped boom sections For example, the joint can be a solid web arm joint, but it cannot be a metal hollow arm joint. As a preferred embodiment, all the box-shaped arm sections included in the fiber composite boom 34 are fiber composite boom sections.

Furthermore, when there are only two box-shaped booms in the boom assembly, it means that the two box-shaped booms are respectively a metal hollow boom 31 and a fiber composite boom 34, and the ends of the two are hinged to each other. . When the number of box-shaped booms in the boom assembly is more than two, the box-shaped boom arranged closest to the head end of the boom assembly is a metal hollow boom 31, and the box-shaped boom arranged closest to the end of the boom assembly The box-shaped boom is a fiber composite boom 34, and the types of other box-shaped booms are not limited.

In the present invention, the farthest end of the boom assembly in the fully extended state is regarded as the end of the boom assembly, and the other end of the boom assembly is correspondingly regarded as the boom assembly. The head end of the boom assembly, but the positions of the end and the head end defined here in the boom assembly will not change due to changes in the posture of the boom assembly (such as switching to a fully folded state). As an example, when the boom assembly of the present invention is applied to construction machinery equipped with a turntable such as a concrete pump truck, the first end of the boom assembly is connected to the turntable, and the end of the boom assembly is close to the distribution point during operation.

Generally, the metal hollow arm 31 can reduce weight by about 20% compared to the solid belly arm 33, while the fiber composite arm 34 can reduce weight by about 20% compared to the metal hollow arm 33. The weight of the boom 31 can be reduced by about 15%. Therefore, the fiber composite boom 34 and the metal hollow boom 31 are respectively arranged close to the end and first end of the boom assembly. From the perspective of lightweight, on the one hand, it can greatly reduce the weight of the boom. The self-weight of the boom assembly at the end and nearby areas, on the other hand, can reduce the load of the metal hollow boom 31, thereby further increasing its hollow area (for example, increasing the number of weight-reducing holes and/or increasing the aperture of the weight-reducing holes) ), which is equivalent to the dead weight of the metal hollow arm 31 also being reduced. Therefore, for the entire arm assembly, the ultimate lightweight effect can be achieved and at the same time it is conducive to reducing costs.

Not only that, from the perspective of mechanical properties, fiber composite materials (mainly considering carbon fiber materials) have the characteristics of higher strength and smaller elastic modulus than metals (mainly considering steel materials). Under the same cross-section, the fiber composite boom The deformation amount and load bearing capacity of 34 are both larger than that of the metal hollow arm 31 . Arranging the fiber composite boom 34 close to the end of the boom assembly can reduce the space occupied by the fiber composite boom 34, thereby providing more layout space for the metal hollow boom 31 with a larger load. The elastic modulus of metal is larger than that of fiber. Under the condition that the strength of the metal hollow arm 31 is satisfied, the metal hollow arm 31 can be set to have a smaller cross-sectional size, which is beneficial to the strength of each box-shaped arm in the arm assembly. Space arrangement.

It can be seen that the boom assembly of the present invention is conducive to achieving the optimal combination of lightweight, performance and cost of the boom assembly by combining the metal hollow boom 31 and the fiber composite boom 34 and arranging their positions reasonably. .

In one embodiment, when there are more than two box-type booms in the boom assembly, at least one solid web boom 33 can be arranged between the metal hollow boom 31 and the fiber composite boom 34. The web boom 33 includes at least one solid web boom section, and the type of box-shaped boom section in the solid web boom 33 can only be a solid web boom section. For example, referring to Figures 14 and 15, in a concrete pump truck with six arms articulated in sequence (that is, one arm to six arms articulated in sequence from the head end to the end), each arm is provided with only one arm. Since the three-arm frame is usually a curved arm frame, if the hollow structure is provided on the web, the strength of the arm frame will be reduced, and the manufacturing process of the arm frame is poor. Therefore, the three-arm frame can use a solid-web arm frame 33, and one arm The frame and the two-arm frame all use metal hollow arms 31, and the four-arm, five-arm and six-arm frames all use fiber composite arms 34. In fact, according to the force and working condition requirements, for some box-type booms that are subject to large forces and have complex working conditions, a solid-belly boom 33 can be used to ensure the overall strength and stability of the boom assembly.

Of course, in actual applications, other combinations or expansions can be made according to the stress conditions, the number of booms, and the layout requirements, such as any combination of solid belly boom 33, metal hollow boom 31, fiber composite boom 34, or metal hollow boom Any combination of the frame 31 and the fiber composite boom 34 can provide more lightweight boom assemblies with excellent performance. For example, the metal hollow arm frame 31 in the above embodiment may be assembled from multiple box-shaped arm sections including metal hollow arm sections.

In one embodiment, the fiber composite arm 34 includes a hinge hole formed on the web and a bushing 344 sleeved in the hinge hole. Among them, the sleeve 344 includes a sleeve body 345 and an annular flange 346 formed radially outwardly from one end of the sleeve body 345. The annular flange 346 abuts the peripheral portion of the hinge hole, and the outer peripheral wall surface of the sleeve body 345 forms It is a limiting profile. For example, the limiting profile can adopt different shapes such as ellipse, square, etc. In this way, when the sleeve body 345 is sleeved in the hinge hole, the special shape of the limiting profile can limit the relative rotation of the sleeve body 345 and the hinge hole.

Further, referring to Figure 17, the fiber composite boom 34 may also include a connecting sleeve 343 provided between the two side webs and two attachment plates 342 respectively provided on the outer wall surfaces of the two side webs. The connecting sleeve 343 The two axial ends of the shaft sleeves 344 respectively abut the annular flanges 346 of the two sleeves 344, and the two attachment plates 342 are respectively sleeved on the sleeve bodies 345 of the two shaft sleeves 344, so that the connecting sleeves 343 and the attachment plates 342 connect the The shaft sleeve 344 is fixed, and by setting the connecting sleeve 343, the local strength of the hinge point of the boom can be improved and the rigidity of the box structure can be enhanced. Spend.

It should also be noted that the boom assembly design of the present invention is suitable for engineering machinery with boom structures such as pump trucks or other mechanical structures with boom structures. It can also be applied to straight arms, curved arms or The invention does not specifically limit the application fields of the boom assembly as a composite-shaped boom.

To sum up, the present invention aims to perform multi-dimensional optimization of various boom structures such as boom sections, booms composed of at least one boom section, and boom assemblies composed of multiple booms, and provide solutions for booms. Structure provides new design ideas and directions. Among them, by combining and arranging different types of weight-reducing holes and adding reinforced structures, the hollow arm joints can not only meet the needs of different engineering applications, but also solve the problems of insufficient stiffness and instability in existing hollow arm joints. problem, the combination of two shapes of holes not only takes into account the convenience of manufacturing, but also fully considers the stiffness and stability around the weight-reducing holes, and increases the overall structural strength of the hollow arm section, greatly improving the stability of the hollow arm section. properties, making it less likely to break; by arranging new joint components in the segmented boom, namely the first joint, the second joint, the reinforced locking structure, etc., the stress performance of the segmented boom is greatly improved and the operation is effectively improved. Stability, reduce the risk of deformation and damage, improve disassembly and assembly efficiency, and the joint components are arranged in a waterproof and rust-proof position to extend the service life; by combining the metal hollow arm, fiber composite arm, and solid belly arm in the arm assembly The combination arrangement of the boom assembly, etc. is conducive to achieving the optimal combination of lightweight, performance and cost of the boom assembly; and the above various design concepts can be combined in any logical combination, thereby achieving a variety of advantages over the existing boom at the same time Technical effects of class structures.

The optional implementations of the embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above-mentioned implementations. Within the scope of the technical concept of the embodiments of the present invention, the embodiments of the present invention can be modified. The technical solution is subjected to various simple modifications, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

In addition, it should be noted that each specific technical feature described in the above-mentioned specific embodiments can be combined in any suitable manner unless there is any contradiction. In order to avoid unnecessary repetition, the embodiments of the present invention combine various Possible combinations are not specified further.

In addition, any combination of different implementation modes of the embodiments of the present invention can also be performed. As long as they do not violate the ideas of the embodiments of the present invention, they should also be regarded as the content disclosed in the embodiments of the present invention.

Claims (16)

1. A hollow arm joint, characterized in that it includes a hollow arm joint main body (11) and a plurality of reinforcing structures. The hollow arm joint main body (11) is provided with a cavity (101), and the cavity (101) is along the Arranged along the length direction of the hollow arm section main body (11), a plurality of the reinforcing structures are fixed in the cavity (101) at intervals along the length direction of the hollow arm section main body (11), so A plurality of first weight reduction holes (102) and a plurality of second weight reduction holes (103) are provided on opposite sides of the hollow arm section main body (11). The first weight reduction holes (102) and each The second weight reduction holes (103) are all connected with the cavity (101), and the shape of each first weight reduction hole (102) is different from the shape of each of the second weight reduction holes (103). The first weight reduction holes (102) and the plurality of second weight reduction holes (103) are arranged along the length direction of the hollow arm section body (11).
2. The hollow arm section according to claim 1, characterized in that a plurality of the first weight reduction holes (102) and a plurality of the second weight reduction holes (103) are combined into a plurality of weight reduction units (104) , a plurality of the weight reduction units (104) are arranged in sequence along the length direction of the hollow arm section body (11), and each of the weight reduction units (104) includes at least one of the first weight reduction holes (102) ) and at least one second weight-reducing hole (103).
3. The hollow arm section according to claim 2, characterized in that the hollow arm section includes at least one of the following:

   Each weight reduction unit (104) includes one first weight reduction hole (102) and two second weight reduction holes (103), and the first weight reduction hole (102) is provided in two between the second weight-reducing holes (103);

   Each weight reduction unit (104) includes two first weight reduction holes (102) and one second weight reduction hole (103). The second weight reduction hole (103) is provided in two of the weight reduction holes (103). between the first weight-reducing holes (102);

   Each weight reduction unit (104) includes two first weight reduction holes (102) and two second weight reduction holes (103). The two second weight reduction holes (103) are provided on Between the two first weight reduction holes (102);

   Each of the weight reduction units (104) includes two of the first weight reduction holes (102) and three or more of the second weight reduction holes (103). Three or more of the said weight reduction holes (103). The second weight reduction hole (103) is provided between the two first weight reduction holes (102).
4. The hollow arm section according to claim 3, characterized in that the hollow arm section includes at least one of the following:

   The first weight reduction hole (102) is a right-angled trapezoid, and the second weight reduction hole (103) is an isosceles trapezoid;

   The first weight reduction hole (102) is a right-angled triangle, and the second weight reduction hole (103) is an isosceles triangle or an equilateral triangle;

   The first weight-reducing hole (102) is triangular, and the second weight-reducing hole (103) is quadrilateral or polygonal.
5. The hollow arm section according to claim 3, characterized in that two adjacent first weight reduction holes (102), two adjacent second weight reduction holes (103) and two adjacent first weight reduction holes (103). A spacing rib (111) is formed between the weight hole (102) and the second weight-reducing hole (103), and the reinforcing structure is connected to the spacing rib (111).
6. The hollow arm section according to claim 5, characterized in that the hollow arm section includes at least one of the following:

   The reinforcing structure includes a plurality of first reinforcing plates (12). The plurality of first reinforcing plates (12) include at least one first welding edge and at least one first non-welding edge. The first reinforcing plate (12) ) is welded to the inner wall of the hollow arm section main body (11) through the first welding edge, and the first non-welded edge is spaced apart from the inner wall of the hollow arm section main body (11);

   The reinforcing structure includes a plurality of first reinforcing plates (12), and the first reinforcing plates (12) are bending plates;

   The reinforcing structure includes a plurality of first reinforcing plates (12), and the plurality of first reinforcing plates (12) are provided with third weight-reducing holes.
7. The hollow arm section according to claim 6, characterized in that the first reinforcing plate (12) is a flat plate, and the first reinforcing plate (12) is along the radial direction of the hollow arm section main body (11). set up.
8. The hollow arm section according to claim 6, characterized in that the hollow arm section includes at least one of the following:

   The reinforcing structure also includes a plurality of second reinforcing plates (13). The plurality of second reinforcing plates (13) are fixed to the cavity at intervals along the length direction of the hollow arm section body (11). (101), a plurality of the second reinforcing plates (13) and a plurality of the first reinforcing plates (12) are arranged at intervals from each other, and the shape of each second reinforcing plate (13) is consistent with that of each of the first reinforcing plates (12). The reinforcing plates (12) have different shapes, and the second reinforcing plate (13) is connected to the spacing rib plate (111);

   The reinforcing structure also includes a plurality of second reinforcing plates (13), and the plurality of second reinforcing plates (13) are provided with fourth weight-reducing holes (105).
9. The hollow arm section according to claim 8, characterized in that the hollow arm section includes at least one of the following:

   The second reinforcing plate (13) includes a first bending part (131) and a second bending part (132), and the end of the first bending part (131) is in contact with the second bending part (132). The end portion of 132) is connected, and the angle between the first bending portion (131) and the second bending portion (132) is an acute angle;

   The second reinforcing plate (13) includes a first bending part (131), a second bending part (132) and a third bending part (133). The first bending part (131) It is connected with one end of the second bending part (132) to form a first included angle (13a), and the other end of the second bending part (132) is connected with the third bending part (133) to form a third included angle (13a). Two included angles (13b), the first included angle (13a) and the second included angle (13b) are both obtuse angles, or the first included angle (13a) is an acute angle, and the second included angle (13b) is an acute angle. 13b) is an obtuse angle;

   The second reinforcing plate (13) includes a first bending part (131), a second bending part (132), a third bending part (133), a fourth bending part (134) and a fifth bending part (134). part (135), the first bending part (131) and the third bending part (133) are arranged in parallel, and the second bending part (132) is fixedly connected to the first bending part (135). 131) and the third bending part (133), the third bending part (133) is arranged parallel to the fifth bending part (135), and the fourth bending part (134) Fixedly connected between the third bending part (133) and the fifth bending part (135).
10. The hollow arm section according to claim 1, characterized in that the hollow arm section main body (11) includes a bottom plate (113), a top plate (112), a first side plate (114) and a second side plate (115). , the top plate (112) and the bottom plate (113) are arranged oppositely, the first side plate (114) and the second side plate (115) are arranged oppositely, the first side plate (114) and the second side plate (115) are arranged oppositely. The second side plate (115) is fixedly connected between the top plate (112) and the bottom plate (113).
11. A segmented boom, characterized in that at least one box-shaped arm section in the segmented boom is a hollow arm section according to any one of claims 1 to 10, and at least two adjacent The provided box-shaped arm sections are respectively formed into a first box-shaped arm section (210) and a second box-shaped arm section (211) connected through a first joint, a second joint and a reinforced locking structure;

    The first joint includes a first plate body (21) fixed on an open end of the first box-shaped arm section (210), and a first plate hole formed through the first plate body (21). (22) and a sleeve (23) arranged coaxially with the first plate hole (22). The second joint includes a joint fixed on the end opening of the second box-shaped arm section (211). The second plate body (24) and the latch (25) extending perpendicularly to the plate surface of the second plate body (24), the latch (25) passes through the first plate hole (22) and is detachable The ground is plugged and fixed in the sleeve (23). The first plate body (21) and the second plate body (24) form a plate-face connection, and a reinforced locking structure is used to lock the latch (25). ) and the sleeve (23).
12. The segmented boom according to claim 11, characterized in that the outer peripheral wall of the latch (25) and the inner peripheral wall of the sleeve (23) form a keyway fitting connection; and/or, the latch (25) forms a keyway fitting connection with the inner peripheral wall of the sleeve (23); The outer peripheral wall of 25) and the inner peripheral wall of the first plate hole (22) form a keyway fitting connection.
13. The segmented boom according to claim 11 or 12, characterized in that the first joint includes four first plates distributed at four corners of the first plate body (21). hole (22) and four sleeves (23) arranged in alignment with the four first plate holes (22), and the second joint includes a portion distributed on the second plate body (24) The four latch pins (25) at the four corners of the inside the sleeve (23).
14. A boom assembly, characterized in that the boom assembly includes a plurality of box-shaped booms that are hinged in sequence, at least one of the box-shaped booms is formed as a metal hollow boom (31), and at least one of the box-shaped booms is The box-shaped arm is formed into a fiber composite arm (34). The metal hollow arm (31) is arranged close to the head end of the arm assembly. The fiber composite arm (34) is close to the arm. Arranged at the end of the frame assembly, the fiber composite arm frame (34) includes at least one fiber composite arm section, and the metal hollow arm frame (31) includes at least one metal hollow arm section formed according to claims 1 to The hollow arm section described in any one of 10.
15. The boom assembly according to claim 14, characterized in that at least one of the box-shaped booms is formed as a solid web boom (33), and the solid web boom (33) is arranged on the metal hollow arm. between the frame (31) and the fiber composite arm frame (34).
16. The boom assembly according to claim 14, characterized in that the fiber composite boom (34) includes a hinge hole formed on the web and a bushing (344) sleeved in the hinge hole. , the shaft sleeve (344) includes a shaft sleeve body (345) and an annular flange (346) formed radially outwardly from one end of the shaft sleeve body (345), and the annular flange (346) is connected to the shaft sleeve (345). The peripheral portion of the hinge hole is in contact with each other, and the outer peripheral wall surface of the sleeve body (345) is formed into a limiting profile capable of limiting relative rotation between the sleeve body (345) and the hinge hole.