CN112127631A

CN112127631A - Beam structure, arm section, arm support, mechanical equipment and manufacturing method of arm section

Info

Publication number: CN112127631A
Application number: CN202011008815.6A
Authority: CN
Inventors: 付玲; 刘延斌; 蒋凯歌; 李佳源; 杨吉顺; 徐蔡浩
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2020-12-25
Anticipated expiration: 2040-09-23
Also published as: CN112127631B

Abstract

The invention relates to the field of multi-joint arm supports and discloses a beam structure, an arm section, an arm support, mechanical equipment and a manufacturing method of the arm section. The beam structure comprises a fiber composite layer part and metal connecting linings pre-embedded in connecting parts of the fiber composite layer part, the multiple layers of metal connecting linings are arranged along the wall thickness direction of the fiber composite layer part, and the two adjacent layers of metal connecting linings are separated from each other through the fiber composite layer of the fiber composite layer part, so that the stress uniformity of the connecting parts in the wall thickness direction is improved. The technical scheme provided by the invention is beneficial to improving the connection reliability and the connection service life of the connection part of the beam structure.

Description

Beam structure, arm section, arm support, mechanical equipment and manufacturing method of arm section

Technical Field

The invention relates to the field of multi-joint arm supports of mechanical equipment, in particular to a beam structure, and further relates to an arm section, an arm support, mechanical equipment and a manufacturing method of the arm section.

Background

The multi-joint arm support is generally formed by sequentially connecting a plurality of arm sections, and adjacent two arm sections can rotate relative to each other by taking an adjacent part as a fulcrum. The multi-joint arm support can be widely applied to various fields, such as a movable arm of a robot, an observation equipment support, engineering mechanical equipment and the like.

As a typical multi-joint boom, a folding boom is a key operation component of engineering machinery such as a concrete pump truck, a fire truck, an excavator and the like, and determines the use performance of a host of the engineering machinery.

With the rapid development of economic construction, more and more operation occasions require engineering mechanical equipment with a longer arm support. With the increase of the length of the arm support, the weight of the arm support and the working moment are increased, which not only puts higher requirements on the chassis structure, but also makes the fatigue cracking problem of the arm support more prominent. In order to solve these problems, it is necessary to reinforce the lightweight design of the arm support.

The fiber composite material (hereinafter referred to as fiber composite material) has the advantages of high specific strength, high specific modulus, good fatigue resistance, good damage safety, good damping performance, strong designability and the like, and is effectively applied to lightweight design and manufacture of the folding arm support, and has obvious effect.

In the folding arm frame, when the main structure (i.e. the beam structure) of the arm frame is made of fiber composite materials, the connection part of the arm section and the arm section or the connection part of the arm section and the driving element has the problems of low connection fatigue life and insufficient reliability due to the complicated loading and the action of rotary friction.

Disclosure of Invention

It is an object of the present invention to overcome at least to some extent the above-mentioned problems of the prior art and to provide a solution that facilitates the reliability and longevity of the connection at the connection point of the lifting beam structure.

In order to achieve the above object, a first aspect of the present invention provides a beam structure, where the beam structure includes a fiber composite layer portion and metal connecting liners embedded in a connecting portion of the fiber composite layer portion, multiple layers of the metal connecting liners are arranged along a wall thickness direction of the fiber composite layer portion, and two adjacent layers of the metal connecting liners are separated from each other by the fiber composite layer of the fiber composite layer portion, so as to improve the uniformity of stress on the connecting portion in the wall thickness direction.

Preferably, the metal connecting linings are spaced apart in the longitudinal direction of the beam structure.

Preferably, a beam structure through hole is formed in the beam structure at a position where the metal connecting lining is embedded along the wall thickness direction of the beam structure.

Preferably, the beam structure through hole comprises a first mounting hole; the first mounting hole is a shaft sleeve mounting hole, a shaft sleeve is coaxially assembled in the shaft sleeve mounting hole, and limiting parts which are abutted to hole edge parts at two axial ends of the first mounting hole are respectively arranged at outer edge parts at two ends of the shaft sleeve.

Preferably, the beam structure through hole further comprises second mounting holes distributed on the periphery of the first mounting hole; the second mounting hole is a threaded fastener mounting hole, a threaded fastener is mounted in the threaded fastener mounting hole, and gaskets for reinforcing the connection strength of the threaded fastener are mounted on the outer peripheral surfaces of two ends of the threaded fastener.

Preferably, the cross section of the beam structure is rectangular, the side walls of the beam structure corresponding to two opposite sides of the rectangular cross section are provided with a fiber laying angle of the fiber composite material layer part as a first angle; on the side wall of the beam structure corresponding to the other two opposite sides of the rectangular cross section, the fiber laying angle of the fiber composite material layer part is a second angle; wherein the first angle is less than the second angle; the fibre lay angle is the angle between the fibre and the longitudinal direction of the beam structure.

Preferably, the value range of the first angle is 0-45 degrees; the value range of the second angle is 45-90 degrees.

Based on the beam structure provided in the first aspect of the invention, the second aspect of the invention provides an arm segment comprising the beam structure according to the first aspect of the invention.

Preferably, the beam structure is divided in a longitudinal direction into a linearly extending beam body and an end bend formed integrally with the beam body and extending smoothly to one side from an end of the beam body in a direction deviating from the linear extension of the beam body, the end bend being adapted to be hinged to the other arm section so that the adjacent two arm sections can be folded or unfolded by a driving force; the metal connecting lining is pre-embedded in the end elbow.

Preferably, the beam body is further formed with a drive element hinge for articulating a drive element, the drive element hinge extending in a direction offset from the linear extension of the beam body to the side of the end bend; the metal connecting lining is embedded in the hinged part of the driving element; the driving element is used for providing the driving force.

Preferably, an end reinforcing cover plate for reinforcing the strength of the beam structure is mounted on the end bend.

Based on the arm section provided by the second aspect of the invention, the third aspect of the invention provides an arm support, which comprises a plurality of arm sections sequentially hinged and connected in series, wherein the arm sections are the arm sections according to the second aspect of the invention.

Based on the arm support provided by the third aspect of the present invention, a fourth aspect of the present invention provides a mechanical device, where the mechanical device includes the arm support provided by the third aspect of the present invention.

A fifth aspect of the invention provides a method of manufacturing an arm segment comprising a beam structure, the method comprising:

step 1, laying a fiber composite layer on a fiber composite layer part;

step 2, mounting the metal connecting lining on the connecting position of the outer surface of the laid fiber composite layer;

step 3, laying another fiber composite layer on the fiber composite layer part so as to pre-embed the metal connecting lining between the two fiber composite layers;

and (3) circularly executing the step (2) to the step (3) to enable the fiber composite layer and the plurality of metal connecting linings of the fiber composite layer part to be alternately stacked and distributed in the wall thickness direction of the beam structure, so that the stress uniformity of the connecting part of the beam structure in the wall thickness direction of the beam structure is improved.

Preferably, step 1 is preceded by: installing a core film;

wherein the fiber composite layer is laid outside the core film in a winding manner.

Preferably, the core film includes a beam body core film and a hinge point core film installed at an outer side of the beam body core film, the hinge point core film being capable of indicating the connection portion of the fiber composite layer.

Preferably, the hinge point core membranes are spaced apart in the longitudinal direction of the beam body core membrane and are mounted on the same side of the beam body core membrane for moulding the end bends of the beam structure and/or the drive element hinges.

Preferably, the beam structure is divided into a beam main body extending linearly in the longitudinal direction and an end bend extending smoothly to one side from an end of the beam main body in a direction deviating from the linear extension direction of the beam main body, the end bend is used for being hinged with the other arm section so that the two adjacent arm sections can be folded or unfolded under the action of driving force, and the metal connecting lining is embedded in the end bend;

the beam main body is also provided with a driving element hinge part for hinging a driving element, the driving element hinge part extends towards one side of the end elbow in a direction deviating from the linear extension direction of the beam main body, the metal connecting lining is embedded in the driving element hinge part, and the driving element is used for providing the driving force.

Preferably, after the step 2-step 3 are executed in a loop, the method further comprises: curing the beam structure.

Preferably, the outer surface of the core film is coated with a release agent, and after curing the beam structure, further comprising the steps of: removing the core film.

Preferably, after removing the core film, further comprising the steps of: cutting the ends of the beam structure to form end bends.

Preferably, after cutting the end of the beam structure, the method further comprises the steps of:

and arranging a beam structure through hole at the position of the beam structure where the metal connecting lining is arranged along the wall thickness direction of the beam structure.

Preferably, the beam structure through hole comprises a first mounting hole; the first mounting hole is a shaft sleeve mounting hole, a shaft sleeve is coaxially assembled in the shaft sleeve mounting hole, and limiting parts which are abutted to hole edge parts at two axial ends of the first mounting hole are formed at outer edge parts at two ends of the shaft sleeve.

Preferably, the beam structure through hole further includes second mounting holes, the second mounting holes are distributed on the periphery of the first mounting hole, wherein the second mounting holes are threaded fastener mounting holes, threaded fasteners are mounted in the threaded fastener mounting holes, and gaskets for reinforcing the connection strength of the threaded fasteners are mounted on the outer peripheral surfaces of the two ends of each threaded fastener.

Preferably, after cutting the end of the beam structure, the method further comprises the steps of: and mounting an end reinforcing cover plate for reinforcing the strength of the beam structure on the end elbow.

Preferably, the cross section of the beam structure is rectangular, and the fiber laying angle of the fiber composite material layer part on the side wall of the beam structure corresponding to two opposite sides of the rectangular cross section is a first angle; the fiber laying angle of the fiber composite material layer part on the side wall of the beam structure corresponding to the other two opposite sides of the rectangular cross section is a second angle; wherein the first angle is less than the second angle; the fibre lay angle is the angle between the fibre and the longitudinal direction of the beam structure.

The technical scheme provided by the invention has the following beneficial effects:

in the beam structure provided by the embodiment of the invention, the plurality of layers of metal connecting linings are arranged along the wall thickness direction of the fiber composite layer part, and the two adjacent layers of metal connecting linings are separated by the fiber composite layer of the fiber composite layer part. That is, the metal joint liner and the fiber composite material layer constitute a laminated structure arranged along the thickness direction of the beam structure. Laminated structure has increased the area of contact between compound material layer of fibre and the metal connection inside lining, because the load that the connection position metal connection inside lining was undertaken finally need rely on the connection face between metal connection inside lining and the compound material layer of fibre, transmit for other parts, adopt laminated structure, can improve the stress uniformity of the connection position of beam structure on the wall thickness direction of this beam structure, and the load evenly distributed that will be born to the metal connection inside lining in the connection position is on the interface of connecting of compound material layer of more fibre and metal connection inside lining, and then transmit the load that the beam structure bore for other parts more evenly, improve the connection reliability and the connection life of the connection position of beam structure.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a folding arm support provided in an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an arm segment provided in an embodiment of the present invention;

FIG. 3 is a schematic outer profile view of FIG. 2;

FIG. 4 is a schematic cross-sectional view of FIG. 2;

FIG. 5 is a schematic diagram of the pre-buried position of the metal connecting lining in FIG. 2;

FIG. 6 is a cross-sectional structural view of the attachment portion of the beam structure of FIG. 2;

FIG. 7 is a schematic view of the installation of bolts at the attachment locations of the beam structure of FIG. 2;

FIG. 8 is a schematic view of the mounting of the bushing at the attachment location of the beam structure of FIG. 2;

FIG. 9 is a schematic structural view of an end reinforcing cover plate of the beam structure of FIG. 2;

FIG. 10 is a schematic structural diagram of an arm segment according to another embodiment of the present invention;

fig. 11 is a schematic structural diagram of a foldable boom according to another embodiment of the present invention;

FIG. 12 is a longitudinal cross-sectional view of a beam body core membrane provided by an embodiment of the present invention;

FIG. 13 is a schematic structural view of a core film provided by an embodiment of the present invention;

FIG. 14 is a schematic structural view of a hinge point core film for molding a hinge portion of a drive element according to an embodiment of the present invention;

figure 15 is a schematic structural view of a hinge point core film for molding end bends provided by an embodiment of the present invention;

FIG. 16 is a schematic diagram of the installation location of a metal joint liner on a hinge point core film according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of a metal connecting lining embedded in an end elbow according to an embodiment of the present invention;

fig. 18 is a schematic structural view of a metal connecting lining embedded in a hinge portion of a driving element according to an embodiment of the present invention;

FIG. 19 is a schematic illustration of the fiber wind angle on one of the side walls of a beam structure provided by an embodiment of the present invention;

FIG. 20 is a schematic illustration of the fiber wind angle on another side wall of a beam structure provided by an embodiment of the present invention;

FIG. 21 is a longitudinal cross-sectional view of a beam structure provided in accordance with an embodiment of the present invention, shown unmolded;

FIG. 22 is a schematic structural view of a beam structure provided by an embodiment of the present invention, with the beam body core film demolded;

FIG. 23 is a schematic illustration of a hinge point core film demolded in a beam construction provided by an embodiment of the present invention;

FIG. 24 is a longitudinal cross-sectional view of a beam structure after demolding, provided by an embodiment of the present invention;

FIG. 25 is a schematic drawing of a profile of a beam structure provided by an embodiment of the present invention;

FIG. 26 is a schematic diagram illustrating the location of openings in beam structure vias on a beam structure according to an embodiment of the present invention;

fig. 27 is a schematic illustration of an encapsulation of an upper end reinforcing cover plate of a beam structure according to an embodiment of the present invention.

Description of the reference numerals

1-beam structure; 2-end bend; 3-a connecting rod; 4-a hydraulic oil cylinder; 5-a drive element articulation; 6-end reinforcing cover plate; 7-metal joining lining; 8-a fiber composite layer; 9-bolt; 10-a gasket; 11-a shaft sleeve; 12-a pressure ring; 13-fibers; 14-metal connection structure; 15-beam body core film; 16-hinge point core film; 17-shaft sleeve mounting holes; 18-threaded fastener mounting holes.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right with reference to the accompanying drawings, unless otherwise specified. "inner and outer" refer to the inner and outer contours of the component itself.

Referring to fig. 1, the foldable arm support includes a plurality of arm sections connected in series in sequence, and in order to realize folding and unfolding of the foldable arm support, an elbow structure must be provided at one end of at least one arm section between two adjacent arm sections. Generally, at least one end of each arm section in the foldable arm support has an elbow structure, at least two through holes are formed on the elbow structure, one of the through holes is used for realizing the hinge joint between two adjacent arm sections, the other through hole is used for hinging one end of a connecting rod 3, the other end of the connecting rod 3 is connected with one end of a driving element such as a hydraulic oil cylinder 4, in addition, in order to hinge the other end of the driving element, another hinge hole is usually formed at a position between two ends of the arm section, and the hinge hole is used for hinging the other end of the driving element. The driving element is used for providing a driving force to drive one of the two adjacent arm sections to rotate relative to the other arm section, so that the folding and the unfolding between the two adjacent arm sections are realized.

Each arm section in the fiber composite material folding arm support is made of fiber composite materials, and the lightweight design of the folding arm support is facilitated. However, the connection parts of the arm sections, including the connection parts of the arm sections and the connection parts of the arm sections and the driving element, generally have the problems of low fatigue resistance life and insufficient reliability.

To this end, in a first aspect, embodiments of the present invention provide a beam structure 1, the beam structure 1 being part of an arm segment. The beam structure 1 comprises a fiber composite layer part and metal connecting linings 7 pre-embedded in the connecting parts of the fiber composite layer part, the multiple layers of metal connecting linings 7 are arranged along the wall thickness direction of the fiber composite layer part, and the adjacent two layers of metal connecting linings 7 are spaced apart from each other through the fiber composite layer 8 of the fiber composite layer part, so that the stress uniformity of the connecting parts of the beam structure 1 in the wall thickness direction of the beam structure 1 is improved.

The fiber composite layer portion refers to a fiber composite portion in the beam structure 1, the fiber composite layer portion includes a plurality of fiber composite layers 8, and the plurality of fiber composite layers 8 are arranged along a thickness direction of the fiber composite layer portion. The main manufacturing material of the beam structure 1 is fiber composite material, and the beam structure 1 manufactured by the fiber composite material is beneficial to reducing the weight of the beam structure 1, so that the lightweight design of the folding arm support is realized.

The connecting portion of the fiber composite layer portion is a portion of the fiber composite layer portion for connecting with another component, for example, a position of the fiber composite layer portion for connecting with another arm section, or a position of the fiber composite layer portion for connecting with a driving element.

The pre-embedded metal connection lining 7 means that the metal connection lining 7 is embedded between two fiber composite layers 8 of the fiber composite layer part when the beam structure 1 is manufactured, and is integrated with the beam structure 1.

The metal connecting lining 7 is generally a pure metal part, has different performance from the fiber composite material, has better compression resistance and higher wear resistance, and has the advantage of isotropy.

It should be noted that, if the respective characteristics of the fiber composite material and the metal are utilized to bear the load applied at the through hole, the fiber composite material and the metal at the through hole must be matched. Otherwise, the difference between the material characteristics of the fiber composite material and the metal is too large, and the deformation of the fiber composite material and the metal is not coordinated in the bearing process of the through hole, so that large stress concentration is generated at the cementing interface of the fiber composite material and the metal, and the interface is cracked and fails.

In order to solve the technical problem, in the embodiment of the present invention, a plurality of metal connecting linings 7 are arranged along the wall thickness direction of the fiber composite layer portion, and two adjacent metal connecting linings 7 are separated from each other by the fiber composite layer 8 of the fiber composite layer portion. That is, the metal joint liner 7 and the fiber composite layer 8 constitute a laminated structure arranged along the thickness direction of the beam structure 1.

The metal connecting lining 7 in the laminated structure can "metalize" the fiber composite material at the connecting portion of the beam structure 1, so that the beam structure 1 can more uniformly bear the load at the connecting portion, and the bearing capacity of the connecting portion is enhanced. Specifically, the laminated structure increases the contact area between the fiber composite layer 8 and the metal connecting lining 7, and makes the metal connecting lining 7 and the fiber composite layer 8 more uniformly distributed in the axial direction of the through hole, thereby reducing the stress concentration degree in the axial direction of the through hole. The load born by the metal connecting lining 7 is finally transferred to other parts by depending on the connecting surface, generally an adhesive surface, of the metal connecting lining 7 and the fiber composite layer 8. By adopting the laminated structure, the load born by the metal connecting lining 7 near the through hole can be uniformly distributed on the glue joint interfaces of more fiber composite layers 8 and the metal connecting lining 7, so that the stress level of the glue joint interfaces of the fiber composite layers 8 and the metal connecting lining 7 is reduced, the glue joint reliability of the fiber composite layers 8 and the metal connecting lining 7 is improved, the bearing reliability of the through hole is improved, and the connection reliability and the connection service life between the beam structure 1 and other parts are prolonged.

In addition, in the embodiment of the invention, a multilayer metal connecting lining 7 is adopted, compared with a single-layer metal connecting lining 7, the multilayer metal connecting lining 7 can obviously increase the contact area between the metal connecting lining 7 and the fiber composite layer 8, so that the load borne by the metal connecting lining 7 at the through hole is uniformly distributed on the adhesive surfaces of more fiber composite layers 8 and metal connecting linings 7, the stress level at the adhesive surfaces of the fiber composite layers 8 and the metal connecting lining 7 is reduced, and the connection reliability between the fiber composite layers 8 and the metal connecting lining 7 is improved; and make fibre composite layer 8 and metal connection inside lining 7 distribute more evenly along the axial of through-hole, improve through-hole axial atress homogeneity, reduce through-hole axial stress concentration degree, and then transmit the load that beam structure 1 bore to other spare parts more evenly, improve the connection reliability and the connection life between beam structure 1 and other spare parts.

In the embodiment shown in fig. 6-8, the side walls of the beam structure 1 have three layers of metal connecting linings 7 and four layers of fiber composites 8, respectively, in the thickness direction. The metal connecting linings 7 and the fiber composite layers 8 are alternately distributed and are in a laminated structure. It will be appreciated that the metal connecting lining 7 may also be in a number of two or more layers.

In practice, the metal connecting lining 7 may be made of various materials, such as carbon steel, alloy steel, aluminum alloy, magnesium alloy or titanium alloy, and aluminum alloy is generally preferred. The shape, specification, size and other parameters of the metal connecting lining 7 can be set according to the specifications of arm supports of different engineering machinery. For example, in the arm segment shown in fig. 10-11, the metal joint liner 7 is a generally rectangular metal panel. In the arm segment shown in fig. 26-27, the metal joint liner 7 is generally a curved plate shaped as shown in fig. 17 and 18.

With continued reference to fig. 10-11 and 26-27, the metal joint liners 7 may be spaced apart in the longitudinal direction of the beam structure 1. This is because, for a typical foldable boom, the boom usually includes more than two sections, and for the first and the last sections at both ends, only one end of the beam structure 1 may be hinged to the adjacent section, so that the beam structure 1 has only one connecting portion in the longitudinal direction, and at this time, it is only necessary to embed the metal connecting lining 7 in the sidewall of the connecting end of the beam structure 1. However, since the middle arm section is required to be connected to the other arm sections at both ends in the longitudinal direction, it is necessary to embed metal connection linings 7 in the side walls of both ends in the longitudinal direction of the beam structure 1 of such an arm section. In addition, in order to install a driving element for driving the arm support to fold, a metal connecting lining 7 can be arranged at a position between two ends of the beam structure 1, so that the structural compactness of the arm support is improved.

As described above, in the embodiment of the present invention, the metal connection liner 7 is embedded in the connection portion of the fiber composite layer portion of the beam structure 1, and in order to connect the beam structure 1 to other components, a beam structure through hole is generally formed in the connection portion along the wall thickness direction of the beam structure 1, whereby the beam structure 1 can be connected to other components by a connection member, such as a rivet, a bolt, a pin shaft, or the like, penetrating the beam structure through hole.

Referring to fig. 8 and 27, in a preferred embodiment of the present invention, the beam structure 1 is connected to other components by pins. For the installation pin shaft, the beam structure through hole includes first mounting hole, first mounting hole is axle sleeve mounting hole 17, coaxial axle sleeve 11 that is equipped with in the axle sleeve mounting hole 17, the outward flange position at axle sleeve 11 both ends be equipped with respectively with the locating part of the hole edge position looks butt at the axial both ends of first mounting hole, can prevent axle sleeve axial translation through this locating part to avoid the axle sleeve to drop from the axle sleeve mounting hole, with the installation stability of improvement axle sleeve. Further, in order to prevent the fiber composite material at the hole edge portion of the first mounting hole from being peeled off in the normal direction, the stopper may be formed as a pressing ring 12, and the hole edge portions at both ends in the axial direction of the first mounting hole may be pressed by the pressing ring 12.

Specifically, the boss 11 may be interference-fitted in the boss mounting hole 17, and disposed coaxially with the boss mounting hole 17, and functions to more uniformly transfer the load at the first mounting hole to the stacked structure. 11 both ends of axle sleeve form clamping ring 12, and this clamping ring 12 and beam structure 1's lateral wall looks butt, through this clamping ring 12, can avoid the compound material normal direction of fibre at beam structure through-hole edge to peel off on the one hand, and on the other hand can also compress tightly the laminated structure that compound material layer 8 of fibre and metal connection inside lining 7 formed, prevents the laminated structure layering, improves beam structure 1's stability, and the third aspect can also prevent axle sleeve 11 to drop from axle sleeve mounting hole 17, improves the installation stability of axle sleeve.

It should be noted that, for the beam structures 1 with different structural forms, the arrangement and the function of the shaft sleeve mounting hole 17 can be also different.

Taking fig. 1-9 as an example, end elbows 2 are formed at two ends of the beam structure 1, the folding arm support is formed by sequentially hinging and connecting a plurality of beam structures 1 in series, the end elbows 2 of the beam structures 1 are connection parts, and a plurality of layers of metal connection linings 7 are embedded in the end elbows 2. The bushing mounting holes 17 are provided in the end bend 2 and are typically provided with two bushing mounting holes 17, the two bushing mounting holes 17 being distributed along the longitudinal direction of the end bend 2, wherein one bushing mounting hole 17 is used for hinging the other beam structure 1 and the other bushing mounting hole 17 is used for hinging the connecting rod 3. It can be seen that in this type of beam structure 1, the boss mounting hole 17 is generally used as a hinge hole.

In addition, in order to hinge the driving element, a shaft sleeve mounting hole 17 is also formed at a connecting part between two ends of the beam structure 1, and since it is not necessary to hinge the other beam structure 1, only one shaft sleeve mounting hole 17 may be formed at the connecting part, and the assembling manner of the shaft sleeve 11 in the shaft sleeve mounting hole 17 is the same as that of the shaft sleeve 11 on the end elbow 2, and thus the details are not repeated herein.

Another embodiment of the present invention provides a beam structure 1 as shown in fig. 10-11, the end of such beam structure 1 does not have an end elbow 2, and when two adjacent arm sections are hinged, a metal connecting structure 14 deviating from the longitudinal direction of the beam structure 1 needs to be additionally arranged at the two ends of the beam structure 1 to replace the end elbow 2, so as to realize the hinge joint between the two adjacent arm sections. At this time, a hinge hole for realizing a hinge function between two adjacent arm sections is opened in a portion of the metal connecting structure 14 deviated from the longitudinal direction of the beam structure 1, and a connecting portion of the end portion of the beam structure 1 is mainly used for positioning the metal connecting structure 14. Referring to fig. 7-8, to position the metal connecting structure 14, the beam structure through hole may be a bushing mounting hole 17, or may be a threaded fastener mounting hole 18, such as a bolt mounting hole for mounting the bolt 9, or a rivet mounting hole for mounting a rivet, etc. When the beam structure through hole is the shaft sleeve mounting hole 17, the number of the shaft sleeve mounting holes 17 may be one, or two or more, and the number of the shaft sleeve mounting holes may also be 0 under the condition that other connecting members are adopted to realize the positioning of the metal connecting structure 14. When the boss mounting hole 17 is provided in plural, the plural boss mounting holes 17 are preferably spaced apart along the longitudinal direction of the beam structure 1.

No matter the beam structure 1 with the end elbow 2 or the beam structure 1 without the end elbow 2 is adopted, in order to enhance the stability of the laminated structure consisting of the fiber composite layer 8 and the metal connecting lining 7, a plurality of second mounting holes can be formed along the wall thickness direction of the beam structure 1 at the positions of the beam structure 1 where the metal connecting lining 7 is pre-embedded, the second mounting holes are penetrated through by connecting pieces, and limiting elements for clamping the laminated structure are arranged at the two ends of the connecting pieces, so that the layering of the laminated structure can be effectively prevented, the structural stability of the beam structure 1 is improved, and the mechanical property of the connecting part of the beam structure 1 is enhanced.

In a preferred embodiment of the present invention, as shown in fig. 7, the connecting member may be a threaded fastener, such as a bolt 9, and correspondingly, the second mounting hole may be a threaded fastener mounting hole 18, and the threaded fastener is inserted into the threaded fastener mounting hole 18 and may be in interference fit with the threaded fastener mounting hole 18. Taking a threaded fastener as the bolt 9 as an example, the head of the bolt 9 abuts against the outer side face of the beam structure 1, the tail of the bolt 9 is provided with a nut, the nut tightly presses the inner side face of the beam structure 1, and the bolt 9 is matched with the nut, so that the laminated structure can be clamped along the thickness direction of the beam structure 1, and the lamination of the laminated structure is avoided.

In addition, in order to further enhance the stability of the laminated structure, enhance the connection strength of the screw fastener, and prevent the fiber composite material at the edge portion of the second mounting hole from being peeled off in the normal direction, stoppers respectively abutting on the inner and outer sides of the beam structure 1 are further mounted on the outer circumferential surfaces of both ends of the screw fastener. Taking the threaded fastener as the bolt 9 as an example, the limiting members may be, for example, washers 10, and the washers 10 are respectively disposed between the bolt head and the outer side surface of the beam structure 1 and between the nut and the inner side surface of the beam structure 1.

Through the arrangement of the threaded fastener, the structural stability of the laminated structure can be effectively improved. In a preferred embodiment of the present invention, the second mounting holes are disposed at the periphery of the first mounting holes, and more preferably, the first mounting holes are arranged at intervals along the longitudinal middle portion of the beam structure 1, and the second mounting holes are arranged at intervals along the edge portion of the beam structure 1.

The cross section of the beam structure 1 may be, for example, rectangular, circular, oval or other shapes, and the parameters such as the size of the cross section of the beam structure 1 may be designed according to the arm support requirements of different engineering mechanical devices, and the embodiment of the present invention is not specifically limited herein.

The inventor of the application finds in research that, for a folding arm support with a polygonal cross section, in the operation process of the folding arm support, the beam structure 1 mainly bears the dead weight of the arm support and bending moment and torque generated by load, and the stress state of each side face is different. Taking the cross section of the beam structure 1 as a rectangle as an example, in the operation process, the upper side surface and the lower side surface of the beam structure 1 mainly bear tensile load and compressive load, and the left side surface and the right side surface mainly bear shear load.

In order to adapt to the stress conditions of the beam structure 1 on different sides, the mechanical property of the beam structure 1 is improved, and the service life of the beam structure is prolonged. In a preferred embodiment of the present invention, referring to fig. 20, the angle of the fibers laid on the upper and lower surfaces of the beam structure 1 is a first angle α 1; referring to fig. 19, the angle of the fibers laid on both the left and right faces of the beam structure 1 is a second angle α 2. Wherein the fibre angle indicates the angle between the fibre 13 and the longitudinal direction of the beam structure 1.

Wherein the first angle α 1 is smaller than the second angle α 2. The inventor of the present application found in research that the first angle α 1 of the fiber 13 is selected to be 0 ° or more and α 1 < 45 °, and the second angle α 2 is selected to be 45 ° or more and α 2 or less and 90 °, so as to improve the mechanical properties and the service life of the beam structure 1. More preferably, the first angle α 1 is 0 ° and the second angle α 2 is 45 °, the best effect is obtained.

The fiber 13 of the fiber composite layer 8 may be in various forms, for example, carbon fiber, glass fiber, aramid fiber, and the like, and carbon fiber is preferable. The fiber 13 is soaked in resin and then laid according to certain thickness and layer number to form a fiber composite layer 8, and the fiber composite layer 8 is composed of multiple layers of fiber composite layers. Among them, the resin may be of various kinds, for example, epoxy resin, unsaturated resin, phenol resin and the like, and epoxy resin is preferable.

It should be noted that, the upper and lower side surfaces of the beam structure 1 refer to two side surfaces along the horizontal direction when the beam structure 1 is in the horizontal state in the operation process; the left and right side surfaces of the beam structure 1 refer to two side surfaces in the vertical direction when the beam structure 1 is in the horizontal state during operation.

Based on the beam structure 1 provided in the first aspect of the embodiment of the present invention, the second aspect of the embodiment of the present invention provides an arm section including the beam structure 1 according to the first aspect of the embodiment of the present invention.

The type of the arm segment can be varied, as shown in fig. 10-11, and in one of the embodiments of the arm segment, the arm segment comprises, in addition to the beam structure 1, a metal connecting structure 14 formed separately from the beam structure 1, the metal connecting structure 14 being positioned at a connecting portion of the beam structure 1, such as an end portion of the beam structure 1, for hinging two adjacent arm segments. In some embodiments, a metal connecting structure 14 may also be positioned at the connection between the two ends of the beam structure 1 for articulating a drive element, such as a hydraulic ram 4.

When the arm section includes beam structure 1 and metal connecting structure 14 that the components of a whole that can function independently made, metal connecting structure 14 is fixed a position on beam structure 1 to outwards extend with the vertical direction of deviating beam structure 1, the hinge hole has been seted up at the vertical position of deviating beam structure 1, realize the articulated between two adjacent arm sections through this hinge hole, from this, metal connecting structure 14 can act as the effect of the tip elbow 2 of beam structure 1, thereby, the beam structure 1 that originally need form tip elbow 2 can be the beam structure 1 of linear extension. I.e. the beam structure 1 may be straight instead of curved. The linearly extending beam structure 1 can be integrally formed by winding the fibers 13, and has high production efficiency and low manufacturing cost.

The metal connecting structure 14 is connected to the beam structure 1 in a fixed manner as described above, for example, by a pin connection, a threaded fastener such as a bolt connection, a rivet connection, or the like. During pin shaft connection, a shaft sleeve mounting hole 17 needs to be formed in the beam structure 1, and the shaft sleeve 11 is assembled in the shaft sleeve mounting hole 17, and the assembly manner of the shaft sleeve 11 is as described above, and will not be described herein any more, and the metal connection structure 14 is positioned outside the connection part of the beam structure 1 through a pin shaft which is interference-assembled in the shaft sleeve 11.

As previously mentioned, the boss mounting holes 17 may be spaced apart along the longitudinal direction of the beam structure 1. When the threaded fastener is used for connection, a threaded fastener mounting hole 18 needs to be formed in the beam structure 1, the metal connecting structure 14 is positioned on a connecting portion of the beam structure 1, for example, an outer side surface of the connecting portion, through the threaded fastener penetrating through the threaded fastener mounting hole 18, the threaded fastener may be a bolt 9, for example, and the threaded fastener mounting hole 18 may be located on the periphery of the shaft sleeve mounting hole 17.

As shown in fig. 2 to 3, in another embodiment of the arm section, an end portion of a beam structure 1 is formed to have an end bend 2, the beam structure 1 is divided in a longitudinal direction into a beam main body extending linearly and an end bend 2 formed integrally with the beam main body and extending smoothly from the end portion of the beam main body to one side in a direction deviating from the linear extension of the beam main body, the end bend 2 is adapted to be hinged with another arm section so that the adjacent two arm sections can be folded or unfolded by a driving force; the metal connecting lining 7 is embedded in the end elbow 2.

In the embodiment shown in fig. 2-3, the arm sections have no additional metal connecting structure 14, and because the end of the beam structure 1 is formed with the end elbow 2, two adjacent arm sections can be directly hinged and connected through the end elbow 2. In order to improve the connection reliability between adjacent arm sections and prolong the connection service life between the arm sections, the metal connection lining 7 is embedded in the end elbow 2, and the arrangement mode of the metal connection lining 7 refers to the foregoing description and is not repeated herein. Through pre-buried multilayer metal connection inside lining 7 in tip elbow 2, can rely on metal connection inside lining 7 to undertake the partial load of the beam structure through-hole on the tip elbow 2, improve the wear resistance of beam structure through-hole, reduce beam structure through-hole thickness direction stress concentration degree to improve beam structure through-hole's bearing reliability.

In some embodiments, in order to install the driving element, a driving element hinge portion 5 is further formed at a position between both ends of the beam main body, and the driving element hinge portion 5 may be formed by embedding a plurality of metal connection linings 7 in a connection portion between both ends of the beam main body and opening a hinge hole for hinge-connecting the driving element in the portion where the metal connection linings 7 are embedded. In an embodiment, the drive element hinge 5 extends in a direction deviating from the linear extension of the beam body to the side where the end bend 2 is located, and a hinge hole is formed in the drive element hinge 5 at a position deviating from the longitudinal direction of the beam body.

Referring to fig. 1, the driving element is used for providing a driving force to drive one of the two adjacent arm sections to rotate relative to the other, so as to fold or unfold the plurality of arm sections. In one embodiment, the driving element is a hydraulic oil cylinder 4, one end of the hydraulic oil cylinder 4 is hinged with a hinge hole on a hinge part 5 of the driving element through a pin shaft, the other end of the hydraulic oil cylinder 4 is hinged with one end of a connecting rod 3, and the other end of the connecting rod 3 is hinged with a beam structure through hole on an end elbow 2 of the beam structure 1. When the hydraulic oil cylinder 4 stretches out and draws back, the arm sections are driven to rotate through the connecting rods 3, and folding and unfolding between the two adjacent arm sections are achieved.

Since the part of the end bend 2 of the beam structure 1 that is subjected to relatively large loads is a weak part of the beam structure 1, in order to improve the structural strength of the beam structure 1, in the preferred embodiment of the invention, the end bend 2 of the beam structure 1 is provided with an end reinforcing cover plate 6 for reinforcing the strength of the beam structure 1.

As shown in fig. 9, an end reinforcing cover plate 6 covers the back surface of the end bend 2 and extends from the end of the beam body in the longitudinal direction of the end bend 2 to be fitted on the curved surface of the back side of the end bend 2.

Taking fig. 5 as an example, the end reinforcing cover 6 covers the upper side of the end bend 2, which may increase the strength, rigidity and stability of the beam structure 1. The end reinforcing caps 6 may be connected to the beam structure 1 by gluing, bolts 9 or the like, which bolts may be shared with the bolts 9 at the edge of the end bend 2 when the bolts are selected for positioning the end reinforcing caps 6 on the end bend 2 of the beam structure 1. In other words, by installing the bolts 9 at the edge portions of the end elbows 2, the bolts 9 can position the end reinforcing cover plates 6 on one hand, and can also stabilize the laminated structure of the end elbows 2 on the other hand, so that the fiber composite layers 8 and the metal connecting linings 7 on the end elbows 2 are prevented from being laminated, thereby achieving two purposes.

The shape of the end reinforcing cover plate 6 is adapted to the shape of the end elbow 2 of the beam structure 1, and the cross section of the end elbow 2 is rectangular, for example, the end reinforcing cover plate 6 includes a curved plate capable of covering the curved surface of the back side of the end elbow 2, and vertical flanges formed on the two lateral sides of the curved plate so as to be respectively attached to the lateral walls of the two lateral sides of the end elbow 2.

A plurality of through holes are arranged on the vertical flanging. In addition, the edge parts of the side walls at the two transverse sides of the end elbow 2 are provided with a plurality of beam structure through holes corresponding to the through holes on the vertical flanging, and the beam structure through holes are communicated with the through holes on the vertical flanging, so that the end reinforcing cover plate 6 can be positioned on the back surface of the end elbow 2 of the beam structure 1 through bolts 9 penetrating through the through holes.

The end reinforcing cover plate 6 can be made of metal materials such as carbon steel, alloy steel, aluminum alloy, magnesium alloy, titanium alloy and the like, and fiber composite materials, preferably fiber composite materials. The structure of the end reinforcing cover plate 6 is shown in fig. 9, and the specific parameters such as the size and the like are determined according to the design.

Based on the arm sections provided in the second aspect of the embodiments of the present invention, a third aspect of the embodiments of the present invention provides an arm support, where the arm support includes a plurality of arm sections sequentially hinged and connected in series, and the arm sections are the arm sections according to the second aspect of the embodiments of the present invention.

As shown in fig. 1 and 11, adjacent arm segments may be hinged to each other by end bends 2 or by metal connecting structures 14, depending on the particular type of arm segment.

Taking one of the two adjacent arm sections as a first arm section and the other as a second arm section as an example, in the embodiment shown in fig. 1, two beam structure through holes are respectively formed on the end elbows 2 of the beam structures 1 of the first arm section and the second arm section, and one of the beam structure through holes is closer to the end of the beam structure 1. Wherein, the beam structure through-hole that is closer to the tip of first arm festival hinges each other with the beam structure through-hole that is closer to the tip of second arm festival through the round pin axle. And, another beam structure through-hole of first arm festival is articulated with the one end of first connecting rod 3, and another beam structure through-hole of second arm festival is articulated with the one end of second connecting rod 3, and the other end of first connecting rod 3 and the other end of second connecting rod 3 are articulated each other, and this hinged end is articulated with hydraulic cylinder 4's one end, and hydraulic cylinder 4's the other end articulates on the position between the both ends of first arm festival or second arm festival.

When the hydraulic oil cylinder 4 stretches out and draws back, the connecting rod 3 can be driven to rotate through the hydraulic oil cylinder 4, and the first arm section and/or the second arm section are further driven to rotate through the connecting rod 3, so that the folding or the unfolding between the two adjacent arm sections is realized.

In the embodiment shown in fig. 11, the metal connection 14 at one end of the first arm segment is hinged to the first link 3, the metal connection 14 at one end of the second arm segment is hinged to the second link 3, and the first link 3 and the second link 3 are hinged to each other, and a drive element, which may be, for example, a hydraulic cylinder 4, is also hinged to the hinged ends of the first link 3 and the second link 3. The first connecting rod 3 and the second connecting rod 3 are driven to rotate through the driving element, so that relative rotation between the two arm sections is realized, and the folding or unfolding action of the arm support is controlled.

The metal connecting structure 14 comprises a metal sheet having a contact surface for abutting against the outer surface of the beam structure 1, the metal sheet being positioned at the outer surface of the beam structure 1 by means of first connecting members extending through the metal sheet and the side walls of the beam structure 1.

The connecting rod 3 can be hinged at any position of the metal connecting structure 14, and for convenience of installation, structure simplification and connection strength improvement, one end of the first connecting rod 3 is hinged with a first connecting piece, such as a pin shaft, of a metal sheet penetrating through the end part of the first arm section; one end of the second link 3 is hinged to a first connection piece, such as a pin, of the sheet metal material extending through the end of the second arm section. The other end of the first link 3 and the other end of the second link 3 are hinged to each other.

It can be understood that when the first connecting rod 3 or the second connecting rod 3 is hinged with the first connecting piece, the shaft sleeve 11 for connecting the metal connecting structure 14 with the beam structure 1 and the pin shaft for connecting the connecting rod 3 with the arm section are simultaneously arranged in the hinge hole for penetrating through the first connecting piece; at this time, the shaft sleeve 11 bears the shearing action between the metal connecting structure 14 and the beam structure 1, and the pin shaft bears the shearing action between the arm section and the connecting rod 3, namely, a double shearing action exists at the hinged hole part.

When the first connecting rod 3 or the second connecting rod 3 is connected to other positions of the arm section, the hinge hole part penetrating the first connecting piece does not bear double shearing action between the metal connecting structure 14 and the beam structure 1 and between the arm section and the connecting rod 3.

In the preferred embodiment of the present invention, the cross section of the beam structure 1 is rectangular, metal sheets are installed on both left and right sides of the beam structure 1, a total of four connecting rods 3 are arranged between the first arm section and the second arm section, one end of each of the four connecting rods 3 is hinged through the same pin shaft and is hinged with the driving element, and the four connecting rods 3 are driven by the driving element to move, so that the movement of the arm support is realized.

The drive element may be mounted in any suitable location, for example on mounting fixtures other than arm segments. In the preferred embodiment of the present invention, in order to simplify the structure of the arm support, an additional metal connecting structure 14 is further installed at a position between two ends of the first arm section or the second arm section, and the metal connecting structure 14 is substantially the same as the metal connecting structures 14 at two ends of the arm section. The metal connecting structure 14 comprises metal sheets positioned on both the left and right sides of the beam structure 1, both metal sheets extending outwardly in a direction deviating from the longitudinal direction of the beam structure 1 to form a hinge part deviating from the longitudinal direction of the beam structure 1, the hinge part being formed with hinge holes, the hinge holes of both metal sheets being communicated through a shaft sleeve, while one end of a driving element is hinged with the shaft sleeve and the other end is hinged with a common hinge end of the four connecting rods 3.

Based on the arm support provided in the third aspect of the embodiment of the present invention, the fourth aspect of the embodiment of the present invention provides a mechanical device, where the mechanical device includes an arm support, and the arm support is the arm support provided in the third aspect of the embodiment of the present invention. The mechanical equipment can be, for example, a fire truck, a concrete pump truck, an excavator and the like.

Referring to fig. 12 to 27, a fifth aspect of the embodiment of the present invention provides a method of manufacturing an arm segment including a beam structure 1, the method including the steps of:

step 1, laying a fiber composite layer 8 on a fiber composite layer part; the laying mode can be various, such as direct laying or winding, and in order to improve the production efficiency of the beam structure 1 and reduce the manufacturing cost, in the preferred embodiment of the invention, the fiber composite layer 8 is laid by winding;

step 2, mounting the metal connecting lining 7 at a preset mounting position of the laid fiber composite layer 8; specifically, different preset mounting positions are arranged for different arm sections, some arm sections only need to be provided with the metal connecting lining 7 on one side wall, and some arm sections possibly need to be provided with the metal connecting lining 7 on the side walls between the two side walls and the two ends, and during specific mounting, only one surface of the metal connecting lining 7 is generally required to be attached to the outer surface of the fiber composite layer 8;

and 3, laying another fiber composite layer 8 of the fiber composite layer part on the other side of the metal connecting lining 7, which is opposite to the fiber composite layer 8, and clamping the metal connecting lining 7 between the two fiber composite layers 8 after laying.

In order to enable the metal connection lining 7 to more uniformly transmit the load borne by the beam structure 1 to the metal connection structure 14, the stress concentration between the metal connection lining 7 and the fiber composite layer 8 of the fiber composite layer part is reduced, and the connection service life and reliability are improved. In the preferred embodiment of the present invention, a plurality of metal connecting linings 7 are embedded in the thickness direction of the side walls of the beam structure 1.

In order to achieve the above object, the method further includes, after the step 3 provided in the embodiment of the present invention: and (3) circularly executing the step (2) to the step (3) to enable the fiber composite layers (8) and the metal connecting linings (7) to be alternately stacked and distributed in the wall thickness direction of the beam structure (1), and enable the number of the embedded layers of the metal connecting linings (7) to reach a preset number, generally at least two, so as to improve the stress uniformity of the connecting part of the beam structure (1) in the wall thickness direction of the beam structure (1).

As described above, in order to improve the production efficiency of the beam structure 1 and reduce the manufacturing cost of the beam structure 1, in the preferred embodiment of the present invention, the fiber composite layer 8 is formed by filament winding.

In order to be able to manufacture the beam structure 1 automatically by means of a winding apparatus. In a preferred embodiment of the present invention, step 1 further comprises: a core film is mounted, whereby the fiber composite layer 8 can be laid in a wound manner outside the core film.

The core membrane may be constructed in a variety of forms, which are directly related to the specific type of arm segment. For example, in the embodiments shown in fig. 10 to 11, the core film may only include the beam body core film 15, as shown in fig. 12, the beam body core film 15 is a metal inner layer having a hollow structure with a rectangular cross section, and the material of the metal inner layer may be, for example, carbon steel, alloy steel, aluminum alloy, magnesium alloy, titanium alloy, or the like, preferably, aluminum alloy. The metal inlayer can fixed mounting on the frock clamp of winding equipment, during winding fibre 13, fix one end at metal connection inside lining 7 with fibre 13, control the fibre through winding equipment and lay the angle, then frock clamp drives the metal inlayer rotatory, the winding head area fibre 13 of winding equipment simultaneously is followed and is moved by a lateral opposite side in the axial direction of metal inlayer, the back motion of the winding head of uncontrolled winding is to initial position, so reciprocal, can lay in order to realize the winding of fibre compound layer 8 on the metal inlayer.

In the beam structure 1 formed by the above winding method, after the beam structure 1 is used to form the arm section, the metal connecting structure 14 needs to be installed on the outer side of the beam structure 1 after the beam structure 1 is manufactured, and the metal connecting structure 14 is used to realize the hinge joint between the adjacent arm sections and the hinge joint between the arm section and the driving element.

Another embodiment of the present invention provides an arm segment as shown in fig. 2 to 3, and referring to fig. 12 to 15 for manufacturing this type of arm segment, the core film includes not only a beam body core film 15 but also a hinge point core film 16 for indicating a connection portion of the beam structure 1; in the embodiment shown in fig. 12 to 15, the beam body core film 15 is a metal inner layer having a hollow structure with a rectangular cross section, and the hinge point core film 16 is a hollow structure with an open upper end.

The number of hinge core membranes 16 is related to the specific type of arm segment, and in a preferred embodiment of the invention, as shown in fig. 13, a plurality of said hinge core membranes 16 are spaced apart in the longitudinal direction of said beam body core membrane 15 and mounted on the same side of said beam body core membrane 15 for molding the end bends 2 and/or the drive element hinges 5 of said beam structure 1.

Specifically, as shown in fig. 2 to 3, the beam structure 1 is divided into a beam body extending linearly in the longitudinal direction and an end bend 2 extending smoothly to one side from an end of the beam body in a direction deviating from the linear extension of the beam body, the end bend 2 being adapted to be hinged to another arm section so that the adjacent two arm sections can be folded or unfolded by a driving force, the metal connecting lining 7 being embedded in the end bend 2;

furthermore, for the articulation of a drive element, a drive element articulation 5 for the articulation of a drive element is formed on the beam body, which drive element articulation 5 extends in a direction deviating from the linear extension of the beam body to the side on which the end bend 2 is located, the drive element articulation 5 having embedded therein the metal connecting lining 7, which drive element is intended to provide the drive force.

In a beam structure 1 of the type described above, it is necessary to mount a hinge point core film 16 on the same side of the beam body core film 15, since both the drive element hinge 5 and the end bend 2 are offset from the direction of linear extension of the beam body.

Taking the right-side hinged core film 16 in fig. 16 as an example, the right-side arc of the hinged core film 16 can indicate the installation position of the metal connecting lining 7. Specifically, when the metal joint liner 7 is installed, the arc line below the metal joint liner 7 is aligned with the arc line on the right side of the hinged core film 16. Similarly, the left arc of the left hinge point core film 16 in fig. 16 can indicate the installation position of the left metallic joint liner 7.

In order to facilitate the winding of the fiber composite material, as shown in fig. 14-15, the hinge point core film 16 has a substantially conical structure with gradually widening left and right widths from bottom to top, and the bottom of the hinge point core film 16 is in arc transition.

After the core film is installed, referring to fig. 19-24, the core film can be fixedly installed on a tooling fixture of a winding device, when the fiber 13 is wound, one end of the fiber 13 is fixed at one end of the core film, the fiber laying angle is controlled by the winding device, then the tooling fixture drives the core film to rotate, meanwhile, a filament winding head of the winding device drives the fiber 13 to move from one side to the other side along the direction parallel to the axial direction of the core film, then the filament winding head is controlled to move reversely to the initial position, and the reciprocating operation is carried out, so that the winding and the laying of the fiber composite layer 8 on the core film can be realized.

The winding of the fibre composite layer 8 on the beam structure 1 at the same angle can generally be easily achieved by the above winding. However, for the beam structure 1 with a polygonal cross section, due to different stress conditions of different sides, in order to adapt the fiber laying angle of the fiber composite layer 8 to the stress conditions, the fiber composite layer 8 with different angles can be laid on different sides.

For example, for a beam structure 1 having a rectangular cross section, the fiber composite layers 8 at the first angle α 1 may be laid on both the upper and lower sides, and the fiber composite layers 8 at the second angle α 2 may be laid on both the left and right sides. This case requires changing the setting program of the winding apparatus so that the fibers 13 are aligned at the first angle α 1 when the core film is rotated until the fibers 13 are laid on both the upper and lower sides; and when the core film is rotated until the fibers 13 are laid on both the left and right sides, the fibers 13 are aligned at a second angle alpha 2. In order to meet the positioning problem when the fibers 13 are wound and laid on different sides, it is considered that positioning nodes are arranged on different side walls of the beam structure 1 according to a desired fiber laying angle, and the fibers 13 are positioned through the positioning nodes, so that the fibers 13 at different angles on different side walls of the beam structure 1 are laid.

Furthermore, if the setting procedure of the winding apparatus is not changed, one or more layers of the fiber composite material at the second angle α 2 may be laid on the left and right sides of the beam structure 1 separately after the filament winding head reciprocates once in the axial direction of the core film in such a manner that the fiber laying angle is the first angle α 1; and then controlling the filament winding head to reciprocate once along the axial direction of the core film in a mode that the fiber laying angle is a second angle alpha 2, and then independently laying one or more layers of fiber composite materials with the first angle alpha 1 on the upper side surface and the lower side surface of the beam structure 1. Reciprocating in this manner, the fiber laying angles of the fiber composite layers 8 on the upper and lower sides of the beam structure 1 can be made to be dominant at the first angle α 1, and the fiber laying angles on the left and right sides can be made to be dominant at the second angle α 2, without changing the setting program of the winding apparatus. The ratio of the number of layers of the fiber composite material at the first angle α 1 to the number of layers of the fiber composite material at the second angle α 2 on the same side surface can be adjusted as required, which is not limited in the embodiment of the present invention.

Wherein the fibre lay angle indicates the angle between the fibre 13 and the longitudinal direction of the beam structure 1. The first angle α 1 is smaller than the second angle α 2. The inventor of the present application found in research that the first angle α 1 of the fiber 13 is selected to be 0 ° or more and α 1 < 45 °, and the second angle α 2 is selected to be 45 ° or more and α 2 or less and 90 °, so as to improve the mechanical properties and the service life of the beam structure 1. More preferably, the first angle α 1 is 0 ° and the second angle α 2 is 45 °, the best effect is obtained.

The fiber 13 is wound on the core film in the above way to form the fiber composite layer 8 of the fiber composite layer part, after the first fiber composite layer 8 is laid, the metal connecting lining 7 is installed on the outer surface of the fiber composite layer 8 according to the position of the hinge point core film 16, and the metal connecting lining 7 can be attached to the outer surface of the fiber composite layer 8 in an adhesive way.

After the metal joint liner 7 is installed, the winding step of the fiber composite layer 8 is repeated to form another fiber composite layer 8.

The fiber composite layer 8 is generally formed by winding the fiber 13 after impregnating the resin. Therefore, after the metal connection lining 7 and the fiber composite layer 8 are laid in a predetermined number of layers, the beam structure 1 needs to be further subjected to a curing process. In particular, the beam structure 1 may be placed in a curing oven for heat curing, for example by means of microwaves, infrared rays, etc.

In the beam structure 1 formed in the above manner, since the innermost layer of the beam structure 1 is a metal inner layer, the weight thereof is relatively large. In order to reduce the overall weight of the beam structure 1 to the maximum extent on the basis of ensuring the mechanical properties of the beam structure 1, in the preferred embodiment of the present invention, after curing the beam structure 1, the method further comprises the steps of: the core film in the beam structure 1 is removed.

In order to remove the core film, the outer surface of the core film is coated with a release agent after the installation is completed and before the fiber composite material is wound; thereby, after the beam structure 1 is cured, the core film can be smoothly removed.

More specifically, as shown in fig. 22, the beam body core film 15 is removed from the cured beam structure 1 first along the longitudinal direction of the beam structure 1. After the beam body core film 15 is removed, the hinge point core film 16 is taken out from the cured beam structure 1 from the bottom up, and the hinge point core film 16 is removed from both end ports, as shown in fig. 23.

It should be noted that, in order to facilitate the removal of the beam body core film 15 and the hinge point core film 16, the hinge point core film 16 is generally mounted on a predetermined mounting position of the beam body core film 15 by flexible connection such as adhesion for facilitating the subsequent mold release, and in addition, the hinge point core film 16 is generally formed by using a light material such as foam or plastic.

The beam structure 1 after removal of the core film is shown in fig. 24, where the beam structure 1 is only a semi-finished product, without the end bends 2, and cannot be used as an arm segment. In order to form the arm segment, the end portion of the beam structure 1 shown in fig. 24 is cut in accordance with the shape and specification of the end bend 2 of the arm segment, and as shown in fig. 25, portions surrounded by dotted lines at both ends of the beam structure 1 are removed to form the end bend 2 of the beam structure 1. The cutting mode can adopt any cutting modes such as mechanical cutting, water cutting, ultrasonic cutting or laser cutting.

The shape of the beam structure 1 after cutting is shown in fig. 26. The two ends and the middle part of the beam structure 1 are of a laminated structure, metal connecting linings 7 are embedded in the laminated structure, and the laminated structure is used for being connected with other parts. In order to connect the laminated structure to other components, a beam structure through hole is required to be formed in the laminated structure along the wall thickness direction of the beam structure 1, and the beam structure through hole includes a first mounting hole, which may be, for example, a boss mounting hole 17.

In addition, since the laminated structure is formed by alternately laminating the fiber composite layers 8 and the metal connecting linings 7 in the wall thickness direction of the beam structure 1, the fiber composite layers 8 and the metal connecting linings 7 have different characteristics, and the fiber composite layers 8 and the metal connecting linings 7 may be delaminated under an external force. In order to enhance the structural stability of the laminated structure, in a preferred embodiment of the present invention, the laminated structure is further provided with second mounting holes, the second mounting holes are preferably distributed on the periphery of the first mounting holes, and the second mounting holes may be, for example, threaded fastener mounting holes 18.

For more detailed arrangement and operation of the shaft sleeve mounting hole 17 and the threaded fastener mounting hole 18, reference may be made to the beam structure 1 according to the first aspect of the embodiment of the present invention, and details thereof will not be described here.

Referring to fig. 27, in order to further enhance the strength and structural stability of the beam structure 1, in the preferred embodiment of the present invention, after cutting the end of the beam structure 1, the method further comprises the steps of: an end reinforcing cover plate 6 for reinforcing the strength of the beam structure 1 is mounted on the end bend 2. In particular, the end reinforcing cover plate 6 may be covered on the cut portion of the beam structure 1, attached to the outer surface of the beam structure 1, and fixed to the end bend 2 of the beam structure 1 by a fastener such as a bolt 9. The specific shape and mounting of the end reinforcing cover 6 are as described above and will not be described in detail here.

Through the end reinforcing cover plate 6, on one hand, the stress strength of the beam structure 1 can be reinforced, and on the other hand, the normal peeling of the fiber composite material on the cutting surface of the beam structure 1 can be avoided, so that the structural stability of the beam structure 1 is improved.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.

In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims

1. The beam structure is characterized by comprising a fiber composite material layer part and metal connecting linings embedded in connecting parts of the fiber composite material layer part, wherein multiple layers of the metal connecting linings are arranged along the wall thickness direction of the fiber composite material layer part, and two adjacent layers of the metal connecting linings are separated from each other through the fiber composite material layer of the fiber composite material layer part, so that the stress uniformity of the connecting parts in the wall thickness direction is improved.

2. The beam structure according to claim 1, wherein the metal joining linings are spaced apart in a longitudinal direction of the beam structure.

3. The beam structure according to claim 1, wherein a beam structure through hole is opened in a position of the beam structure where the metal connection lining is embedded along a wall thickness direction of the beam structure.

4. The beam structure of claim 3, wherein the beam structure through hole comprises a first mounting hole; the first mounting hole is a shaft sleeve mounting hole, a shaft sleeve is coaxially assembled in the shaft sleeve mounting hole, and limiting parts which are abutted to hole edge parts at two axial ends of the first mounting hole are respectively arranged at outer edge parts at two ends of the shaft sleeve.

5. The beam structure according to claim 4, wherein the beam structure through-hole further comprises second mounting holes distributed at a periphery of the first mounting holes; the second mounting hole is a threaded fastener mounting hole, a threaded fastener is mounted in the threaded fastener mounting hole, and gaskets for reinforcing the connection strength of the threaded fastener are mounted on the outer peripheral surfaces of two ends of the threaded fastener.

6. The beam structure according to claim 1, wherein the beam structure has a rectangular cross section, two opposite sides of the rectangular cross section correspond to the side walls of the beam structure, and the fiber laying angle of the fiber composite layer portion is a first angle; on the side wall of the beam structure corresponding to the other two opposite sides of the rectangular cross section, the fiber laying angle of the fiber composite material layer part is a second angle; wherein the first angle is less than the second angle; the fibre lay angle is the angle between the fibre and the longitudinal direction of the beam structure.

7. The beam structure according to claim 6, wherein the first angle has a value in the range of 0 ° to 45 °; the value range of the second angle is 45-90 degrees.

8. An arm segment, characterized in that the arm segment comprises a beam structure according to any one of claims 1-7.

9. The arm segment according to claim 8, wherein the beam structure is divided in a longitudinal direction into a beam main body extending linearly and an end bend formed integrally with the beam main body and extending smoothly to one side from an end of the beam main body in a direction deviating from the linear extension of the beam main body, the end bend being adapted to be hinged with another arm segment so that the adjacent two arm segments can be folded or unfolded by a driving force; the metal connecting lining is pre-embedded in the end elbow.

10. The arm segment of claim 9 wherein said beam body further defines a drive element hinge for articulating a drive element, said drive element hinge extending in a direction offset from the linear extension of said beam body to a side of said end bend; the metal connecting lining is embedded in the hinged part of the driving element; the driving element is used for providing the driving force.

11. An arm segment according to claim 9 wherein the end bend has mounted thereon an end reinforcing cap for reinforcing the strength of the beam structure.

12. An arm support, characterized in that, the arm support includes a plurality of articulated arm section of establishing ties in proper order, the arm section is according to any one of claims 8-11 arm section.

13. Machinery equipment, characterized in that it comprises a boom according to claim 12.

14. A method of manufacturing an arm segment comprising a beam structure, the method comprising:

step 1, laying a fiber composite layer on a fiber composite layer part;

15. The method of manufacturing according to claim 14, further comprising, before step 1: installing a core film;

16. The method of manufacturing of claim 15, wherein the core film comprises a beam body core film and a hinge point core film mounted on an outer side of the beam body core film, the hinge point core film being capable of indicating the connection location of the fiber composite layer.

17. A method of manufacture as claimed in claim 16 wherein the hinge point core films are spaced apart longitudinally of the beam body core film and are mounted on the same side of the beam body core film for moulding end bends and/or drive element hinges of the beam structure.

18. The method of manufacturing of claim 17, wherein the beam structure is divided in a longitudinal direction into a linearly extending beam body and an end bend extending smoothly to one side from an end of the beam body in a direction deviating from the linear extension of the beam body, the end bend being adapted to be hinged to another arm section so that the adjacent two arm sections can be folded or unfolded by a driving force, the end bend being embedded with the metal connection lining;

19. The manufacturing method according to claim 15, wherein the step 2 to the step 3 are cyclically executed and then the method further comprises: curing the beam structure.

20. The method of manufacturing of claim 19, wherein an outer surface of the core film is coated with a release agent, further comprising, after curing the beam structure, the steps of: removing the core film.

21. The manufacturing method according to claim 20, further comprising, after removing the core film, the step of: cutting the ends of the beam structure to form end bends.

22. The method of manufacturing of claim 21, further comprising, after cutting the ends of the beam structure, the steps of:

23. The method of manufacturing of claim 22, wherein the beam structure through hole comprises a first mounting hole; the first mounting hole is a shaft sleeve mounting hole, a shaft sleeve is coaxially assembled in the shaft sleeve mounting hole, and limiting parts which are abutted to hole edge parts at two axial ends of the first mounting hole are formed at outer edge parts at two ends of the shaft sleeve.

24. The manufacturing method according to claim 23, wherein the beam structure through hole further includes second mounting holes distributed on the periphery of the first mounting holes, wherein the second mounting holes are threaded fastener mounting holes in which threaded fasteners are mounted, and wherein spacers for reinforcing the coupling strength of the threaded fasteners are mounted on the outer peripheral surfaces of both ends of the threaded fasteners.

25. The method of manufacturing of claim 21, further comprising, after cutting the ends of the beam structure, the steps of: and mounting an end reinforcing cover plate for reinforcing the strength of the beam structure on the end elbow.

26. The method of manufacturing according to claim 14, wherein the beam structure has a rectangular cross section, and the fiber laying angle of the fiber composite layer portion on the side wall of the beam structure corresponding to two opposite sides of the rectangular cross section is a first angle; the fiber laying angle of the fiber composite material layer part on the side wall of the beam structure corresponding to the other two opposite sides of the rectangular cross section is a second angle; wherein the first angle is less than the second angle; the fibre lay angle is the angle between the fibre and the longitudinal direction of the beam structure.

27. The method of manufacturing of claim 26, wherein the first angle ranges from 0 ° to 45 °; the value range of the second angle is 45-90 degrees.