CN213477675U

CN213477675U - Fiber composite beam structure, arm section, arm support and mechanical equipment

Info

Publication number: CN213477675U
Application number: CN202022104690.9U
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: 2021-06-18
Anticipated expiration: 2030-09-23

Abstract

The utility model relates to a mechanical equipment many joints cantilever crane field discloses a fibre combined material beam structure, an arm festival, a cantilever crane and a mechanical equipment. The fiber composite beam structure is provided with through holes for connection along the wall thickness direction, hollow reinforced connecting pieces are coaxially assembled in the through holes, and limiting pieces which are respectively abutted against hole edge parts at two axial ends of the through holes to prevent the hollow reinforced connecting pieces from axially moving are formed on the outer peripheral surfaces of the two ends of the hollow reinforced connecting pieces. The utility model provides a technical scheme can improve the connection reliability and the connection life between compound material beam structure of fibre and other parts.

Description

Fiber composite beam structure, arm section, arm support and mechanical equipment

Technical Field

The utility model relates to a mechanical equipment many joints cantilever crane field specifically relates to a fibre clad material beam structure, and is further, the utility model discloses still relate to an arm festival, an cantilever crane and a mechanical equipment.

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.

In the traditional steel arm support, each arm section in the arm support is formed by blanking and welding and splicing steel plates, and the weight is larger.

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 fiber composite material folding arm support, when the main structure (namely the beam structure) of an arm section in the arm support is made of fiber composite materials, the connection part of the beam structure and other parts has the problems of low connection fatigue life and insufficient reliability due to the complicated loading and the rotary friction action.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the utility model is to overcome the above-mentioned technical problem that exists among the prior art to a certain extent at least, provide a compound material beam structure of fibre for improve the connection reliability between compound material beam structure of fibre and other parts, and then improve the life of cantilever crane.

In order to achieve the above object, the utility model discloses an aspect provides fibre clad material beam structure, the through-hole that is used for connecting is offered along the wall thickness direction in the fibre clad material beam structure, coaxial cavity stiffened connecting piece that is equipped with in the through-hole, be formed with on the outer peripheral face at cavity stiffened connecting piece both ends respectively with the hole edge part looks butt at the axial both ends of through-hole is in order to stop the locating part of cavity stiffened connecting piece axial translation.

Preferably, the limiting member is a pressing ring, and the pressing ring abuts against the hole edge portions at the two axial ends of the through hole to prevent the fiber composite material at the hole edge portions from being peeled off in the normal direction.

Preferably, the hollow reinforcing connecting members are bushings, and the hollow reinforcing connecting members are axially non-rotatably fitted in the through holes, which are spaced apart along the longitudinal direction of the fiber composite beam structure.

Preferably, the fiber composite beam structure comprises a fiber composite layer part and metal connecting linings pre-embedded in 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, two adjacent layers of metal connecting linings are separated from each other through the fiber composite layer of the fiber composite layer part, and the through holes are arranged at the positions, embedded with the metal connecting linings, of the fiber composite beam structure.

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

Preferably, the fiber composite beam structure is provided with mounting holes at positions where the metal connecting linings are pre-embedded, and the mounting holes are distributed on the periphery of the through holes; the 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 fiber composite beam structure is rectangular, the two opposite sides of the rectangular cross section correspond to the side walls of the fiber composite beam structure, and the fiber laying angle of the fiber composite layer part is a first angle; on the side wall of the fiber composite beam structure corresponding to the other two opposite sides of the rectangular cross section, the fiber laying angle of the fiber composite 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 utility model discloses the fibre clad material beam structure that the first aspect provided, the utility model discloses the second aspect provides an arm festival, a serial communication port, the arm festival includes fibre clad material beam structure, fibre clad material beam structure is according to the utility model discloses the first aspect fibre clad material beam structure.

Based on the utility model discloses the arm festival that the second aspect provided, the utility model discloses the third aspect provides an arm support, the arm support includes that a plurality of articulates the arm festival of establishing ties in order to fold and expand in proper order, the arm festival is according to the utility model discloses the second aspect the arm festival.

Based on the utility model discloses the cantilever crane that the third aspect provided, the utility model discloses the fourth aspect provides a mechanical equipment, mechanical equipment includes the cantilever crane, the cantilever crane is according to the utility model discloses the third aspect the cantilever crane.

The utility model provides a technical scheme has following beneficial effect:

the hollow reinforced connecting piece is assembled in the connecting through hole of the fiber composite beam structure provided by the utility model, and after the fiber composite beam structure is connected with other parts through the through hole, the hollow reinforced connecting piece can bear partial load of the through hole, thereby improving the wear resistance of the through hole; and because the peripheral surfaces at the two ends of the hollow reinforced connecting piece are provided with the limiting pieces which are respectively abutted against the hole edge parts at the two axial ends of the through hole so as to prevent the hollow reinforced connecting piece from axially moving, the hollow reinforced connecting piece can be prevented from falling off from the through hole through the limiting action of the limiting pieces, so that the connection reliability between the fiber composite beam structure and other components is improved, and the service life of the arm support is prolonged.

Other features and advantages of the present invention will be described in detail 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 foldable boom provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of an arm section 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 fiber composite beam structure of FIG. 2;

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

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

FIG. 9 is a schematic view of the construction of the end caps of the fiber composite beam construction 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 view 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 diagram of a core film provided by an embodiment of the present invention;

figure 14 is a schematic diagram of a hinge point core membrane for molding a drive element hinge provided by an embodiment of the present invention;

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

fig. 16 is a schematic structural view of a mounting position 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 view 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 view of the winding angle of the fibers on one of the side walls of the fiber composite beam structure according to the embodiment of the present invention;

fig. 20 is a schematic view of the winding angle of the fibers on the other side wall of the fiber composite beam structure provided by the embodiment of the present invention;

fig. 21 is a longitudinal cross-sectional view of a composite fiber beam structure provided in accordance with an embodiment of the present invention without being demolded;

fig. 22 is a schematic structural view of a beam main body core film in a fiber composite beam structure according to an embodiment of the present invention during demolding;

fig. 23 is a schematic structural view of a hinge point core film in a fiber composite beam structure according to an embodiment of the present invention during demolding;

fig. 24 is a longitudinal cross-sectional view of a demolded fiber composite beam structure according to an embodiment of the present invention;

fig. 25 is a schematic view of the outline of a fiber composite beam structure according to an embodiment of the present invention;

fig. 26 is a schematic view illustrating the position of the through hole in the fiber composite beam structure according to an embodiment of the present invention;

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

Description of the reference numerals

1-fiber composite beam structure; 2-end bend; 3-a connecting rod; 4-a hydraulic oil cylinder; 5-a drive element articulation; 6-end 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-a through hole; 18-threaded fastener mounting holes.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

In the embodiments of the present invention, the use of directional terms such as "upper, lower, left, and right" generally means upper, lower, left, and 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 comprises a plurality of arm sections connected in series in sequence, and in order to realize the folding and unfolding of the foldable arm support, at least one end of one arm section must be provided with an end elbow 2 between two adjacent arm sections. In general, at least one end of each arm section in the folding arm support is provided with an end elbow 2, at least two through holes 17 are formed on the end elbow 2, one through hole 17 is used for realizing the hinge joint between two adjacent arm sections, the other through hole 17 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, a hinging hole is also formed on the position between the two ends of the arm section, and the hinging 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.

Fig. 10-11 show another type of folding arm support, which has no end elbow 2 at the end of the arm section, and when two adjacent arm sections are hinged, a metal connecting structure 14 deviating from the longitudinal direction of the arm section is required to be arranged at the two ends of the arm section instead of the end elbow 2 to realize the hinge joint between the adjacent arm sections.

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. The main structure of the arm section is a fiber composite beam structure 1, and the connecting parts of the fiber composite beam structure 1 comprise the parts of the fiber composite beam structure 1 connected with other arm sections, the connecting parts of the fiber composite beam structure 1 and a driving element, and the connecting parts of the fiber composite beam structure 1 and a metal connecting structure 14, so that the problems of low fatigue resistance life and insufficient reliability are generally existed.

Therefore, the embodiment of the utility model provides a fibre clad material beam structure 1, offer the through-hole 17 that is used for the connection along the wall thickness direction on the fibre clad material beam structure 1, coaxial assembly has cavity reinforced connector in the through-hole 17, be formed with on the outer peripheral face at cavity reinforced connector both ends respectively with the hole edge part looks butt at the axial both ends of through-hole 17 is in order to stop the locating part of cavity reinforced connector axial translation.

The fiber composite through hole 17 has the characteristics of poor compression resistance, low wear resistance and anisotropy, the hollow reinforced connecting piece is arranged in the through hole 17 of the fiber composite beam structure 1, when the fiber composite beam structure 1 is connected with other parts, the hollow reinforced connecting piece is connected with other parts through the connecting piece penetrating through the hollow reinforced connecting piece, the hollow reinforced connecting piece can bear partial load of the through hole 17, the wear resistance of the through hole 17 is improved, and therefore the connection reliability and the connection service life between the fiber composite beam structure 1 and other parts are improved. Under the condition that the hollow reinforcing connecting piece adopts a metal piece, the metal piece can also reduce the performance difference degree of the through hole 17 in the circumferential direction, and further improve the connection reliability and the connection service life of the through hole 17.

In the research of the inventor of the application, it is found that if the hollow reinforced connecting piece is arranged in the through hole 17 of the fiber composite beam structure 1 to improve the connection reliability of the fiber composite beam structure 1, the hollow reinforced connecting piece is easy to loosen and fall off in the use process of the arm support, and the service life of the arm support is influenced.

Therefore, the embodiment of the present invention provides a fiber composite beam structure 1, wherein the outer peripheral surfaces of the two ends of the hollow reinforced connector are respectively formed with a position-limiting part which abuts against the hole edge parts of the two axial ends of the through hole 17 to prevent the axial translation of the hollow reinforced connector. Through the limiting effect of the limiting part, the hollow reinforcing connecting piece can be prevented from falling off from the through hole 17, so that the connection reliability between the fiber composite beam structure 1 and other parts is improved, and the service life of the arm support is prolonged.

In another preferred embodiment, the hollow connector armature and the through hole 17 are configured such that after the hollow connector armature is installed, it cannot rotate about the central axis of the through hole 17. This arrangement may be various, for example, the hollow reinforcing connecting member is screwed to the through hole 17, connected by interference fit, connected by adhesive, etc., whereby the installation stability of the hollow reinforcing connecting member in the through hole 17 can be further improved, and the connection reliability and the connection life between the fiber composite beam structure 1 and other components can be further improved.

It should be noted that, since the stoppers are formed at both ends of the hollow reinforcing link, screwing the hollow reinforcing link to the through hole 17 does not cause the hollow reinforcing link to rotate axially in the through hole 17.

In order to prevent the axial translation of the hollow reinforcing connecting member, the position-limiting members may be in contact with the outer edges of the two axial ends of the through hole 17, and the specific shape thereof may be arbitrary. Wherein, the outer edges of the two axial ends of the through hole 17 correspond to the inner side surface and the outer side surface of the fiber composite beam structure 1.

Referring to fig. 8, in the preferred embodiment of the present invention, the limiting member is a pressing ring 12, that is, the limiting member extends along the circumferential direction on the outer circumferential surface of the hollow reinforcing connecting member and forms a closed loop structure. The closed loop structure tightly presses the outer edge parts of the two axial ends of the through hole 17, so that the normal peeling of the fiber composite material at the edge part of the hole can be avoided, and the structural stability of the fiber composite material beam structure 1 is improved.

The specific type of hollow reinforcing connecting member can be various, and in a preferred embodiment of the present invention, the hollow reinforcing connecting member is a shaft sleeve 11, and the shaft sleeve 11 is preferably interference-fitted in the through hole 17 of the fiber composite beam structure 1.

Referring to fig. 1 and 11, in order to connect the fiber composite beam structure 1 to other components, whether the fiber composite beam structure 1 is formed with the end bend 2 at the end or the fiber composite beam structure 1 without the end bend 2 at the end, a plurality of through holes 17 are generally formed in the fiber composite beam structure 1, and the plurality of through holes 17 are spaced apart in the longitudinal direction of the fiber composite beam structure 1. Depending on the type of fibre composite beam structure 1, there are through holes 17 for articulation of driving elements, such as hydraulic rams 4, through holes 17 for articulation of adjacent arm segments, and through holes 17 for articulation of connecting rods 3 or positioning of metal connecting structures 14.

In order to further enhance the reliability and lifetime of the connection between the fibre composite beam structure 1 and other components. In another preferred embodiment of the present invention, the fiber composite beam structure 1 comprises a fiber composite layer portion and a pre-buried metal connecting lining 7 in the connecting portion of the fiber composite layer portion, the metal connecting lining 7 and the fiber composite layer 8 of the fiber composite layer portion are alternately stacked and distributed in the thickness direction of the fiber composite beam structure 1. More preferably, the plurality of layers of metal connecting linings 7 are arranged along the wall thickness direction of the fiber composite layer part, two adjacent layers of metal connecting linings 7 are spaced apart by the fiber composite layer 8 of the fiber composite layer part, and the through hole 17 is opened at the position of the fiber composite beam structure 1 where the metal connecting linings 7 are embedded.

The fiber composite layer portion refers to a fiber composite portion in the fiber composite 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 fiber composite beam structure 1 is fiber composite, and the fiber composite beam structure 1 manufactured by the fiber composite is beneficial to reducing the weight of the fiber composite beam structure 1, so that the lightweight design of the folding arm support is realized.

The connecting portion of the fiber composite layer portion refers to a portion of the fiber composite layer portion for connecting with another member, for example, a position of the fiber composite layer portion for connecting another arm section, or a position of the fiber composite layer portion for connecting a driving element. The through hole 17 is opened at a connection portion of the fiber composite layer portion, and the fiber composite layer portion is connected to other members by a connector penetrating the through hole 17.

The pre-embedded metal connecting lining 7 means that the metal connecting lining 7 is embedded between two fiber composite layers 8 of the fiber composite layer part when the fiber composite beam structure 1 is manufactured, and is integrated with the fiber composite 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, if the metal part is embedded in the connecting part of the fiber composite material, after the through hole 17 is processed at the connecting part, the metal part can bear partial load of the through hole 17, the wear resistance of the through hole 17 is improved, the difference degree of the performance of the through hole 17 in the circumferential direction is reduced, the fatigue resistance is improved, and the connection service life is prolonged.

It should be noted that if the fiber composite material and the metal are utilized to bear the load applied to the through hole 17, the fiber composite material layer 8 and the metal connecting lining 7 at the through hole 17 must be matched. Otherwise, the difference between the material properties 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 17, so that large stress concentration is generated at the bonding 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, the metal connecting lining 7 and the fiber composite layer 8 form a laminated structure arranged along the thickness direction of the fiber composite beam structure 1.

The metal connecting lining 7 in the laminated structure can metalize the fiber composites at the connecting part of the fiber composite beam structure 1, so that the fiber composite beam structure 1 can more uniformly bear the load at the connecting part and strengthen the bearing capacity of the connecting part. 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 17, and reduces the stress concentration degree in the axial direction of the through hole 17. Because the load born by the metal connecting lining 7 finally needs to depend on the connecting surface of the metal connecting lining 7 and the fiber composite layer 8, generally a glue joint surface, and is transferred to other parts, the laminated structure is adopted, the load born by the metal connecting lining 7 near the through hole 17 can be uniformly distributed on glue joint interfaces of more fiber composite layers 8 and metal connecting linings 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 17 is improved, and the connection reliability and the connection service life between the fiber composite beam structure 1 and other parts are prolonged.

In a more preferred embodiment of the present invention, a plurality of metal connecting linings 7 are adopted, two adjacent metal connecting linings 7 are spaced apart by a fiber composite layer 8, and compared with a single-layer metal connecting lining 7, the multilayer metal connecting lining 7 can significantly 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 17 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 linings 7 is reduced, and the connection reliability between the fiber composite layers 8 and the metal connecting linings 7 is improved; and make fibre combined material layer 8 and metal connecting lining 7 along the axial of through-hole 17 more evenly distributed, improve through-hole 17 axial atress homogeneity, reduce through-hole 17 axial stress concentration degree, and then transmit the load that fibre combined material beam structure 1 bore to other parts more evenly, improve the connection reliability and the connection life between fibre combined material beam structure 1 and other parts.

In the embodiment shown in fig. 6-8, the side walls of the fiber composite beam structure 1 have three metal connecting linings 7 and four fiber composite layers 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 number of one, two or more than three 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 connecting linings 7 may be spaced apart in the longitudinal direction of the fiber composite beam structure 1. This is because, for a general folding arm support, the arm support usually includes more than two arm sections, and for the first arm section and the last arm section at both ends, only one end of the fiber composite beam structure 1 may be hinged to the adjacent arm section, so that the fiber composite 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 connecting end side wall of the fiber composite beam structure 1. However, in the middle arm section, since both ends in the longitudinal direction of the arm section need to be connected to other arm sections, it is necessary to embed metal connection linings 7 in the side walls at both ends in the longitudinal direction of the fiber composite beam structure 1 of the arm section. In addition, in order to install a driving element for driving the arm support to be folded, a metal connecting lining 7 can be installed at a position between two ends of the fiber composite 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 connecting lining 7 is embedded in the connecting portion of the fiber composite layer portion of the fiber composite beam structure 1, in order to connect the fiber composite beam structure 1 with other components, a through hole 17 is usually formed at the connecting portion along the wall thickness direction of the fiber composite beam structure 1, the hollow reinforcing connecting member is coaxially assembled in the through hole 17, and the fiber composite beam structure 1 can be connected with other components through a connecting member, such as a pin, penetrating through the hollow reinforcing connecting member.

The preferred axle sleeve 11 of cavity enhancement connecting piece, axle sleeve 11 both ends form clamping ring 12, this clamping ring 12 and fibre combined material beam structure 1's lateral wall looks butt, through this clamping ring 12, on the one hand can avoid the fibre combined material normal direction of through-hole 17 edge to peel off, on the other hand can also compress tightly the laminated structure that fibre combined material layer 8 and metal connection inside lining 7 formed, prevent the laminated structure layering, improve fibre combined material beam structure 1's stability, furthermore, clamping ring 12 can also improve the installation stability of axle sleeve 11 in through-hole 17, prevent axle sleeve 11 to drop from through-hole 17.

It should be noted that, for the fiber composite beam structures 1 with different structural forms, the arrangement and the function of the through holes 17 may also be different.

Taking fig. 1-9 as an example, end elbows 2 are formed at two ends of such a fiber composite beam structure 1, the folding arm support is formed by sequentially hinging and connecting a plurality of fiber composite beam structures 1 in series, the end elbows 2 of the fiber composite beam structures 1 are connection parts, and a plurality of layers of metal connection linings 7 are embedded in the end elbows 2. The through hole 17 is provided in the end bend 2 and is typically provided with two through holes 17, the two through holes 17 being distributed along the longitudinal direction of the end bend 2, wherein one through hole 17 is used for hinging the other fibre composite beam structure 1 and the other through hole 17 is used for hinging the connecting rod 3. It can be seen that in this type of fiber composite beam structure 1, the through hole 17 is generally used as a hinge hole, and a hollow reinforcing connecting member, such as the interference fit shaft sleeve 11, is coaxially fitted in the through hole 17; the fiber composite beam structure 1 is hinged with the connecting rod 3 or another fiber composite beam structure 1 through a pin shaft penetrating through the shaft sleeve 11.

In addition, in order to hinge the driving element, the connecting part between the two ends of the fiber composite beam structure 1 is also provided with a through hole 17, and since it is not necessary to hinge another fiber composite beam structure 1, the connecting part can be provided with only one through hole 17, and the assembling mode of the hollow reinforcing connecting piece in the through hole 17 is the same as that of the hollow reinforcing connecting piece on the end elbow 2, and the details are not repeated here.

Taking fig. 10-11 as an example, the end of the fiber composite beam structure 1 does not have the end elbow 2, and when two adjacent arm sections are hinged, a metal connecting structure 14 deviating from the longitudinal direction of the fiber composite beam structure 1 needs to be additionally arranged at two ends of the fiber composite beam structure 1 to replace the end elbow 2, so as to realize the hinge joint between the adjacent arm sections. At this time, a hinge hole for realizing a hinge function between two adjacent arm sections is formed in a portion of the metal connecting structure 14 that is deviated from the longitudinal direction of the fiber composite beam structure 1, and a connecting portion of an end portion of the fiber composite beam structure 1 is mainly used for positioning the metal connecting structure 14. In order to position the metal connecting structure 14, one or more through holes 17 are formed in the fiber composite beam structure 1, when the through holes 17 are provided in plurality, the through holes 17 are preferably distributed at intervals along the longitudinal direction of the fiber composite beam structure 1, hollow reinforcing connecting members, such as bushings 11, are coaxially fitted in the through holes 17, and the metal connecting structure 14 is positioned on the fiber composite beam structure 1 through connecting members, such as pins, which are interference-fitted in the bushings 11.

No matter the fiber composite beam structure 1 with the end elbow 2 or the fiber composite beam structure 1 without the end elbow 2, in order to enhance the stability of the laminated structure composed of the fiber composite layer 8 and the metal connecting lining 7, a plurality of mounting holes can be arranged along the wall thickness direction of the fiber composite beam structure 1 at the position of the fiber composite beam structure 1 pre-embedded with the metal connecting lining 7, the mounting holes are penetrated 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 hindered, the structural stability of the fiber composite beam structure 1 is improved, and the mechanical property of the connecting part of the fiber composite beam structure 1 is enhanced.

As shown in fig. 7, in the preferred embodiment of the present invention, the connecting member may be, for example, a threaded fastener, such as a bolt 9, and correspondingly, the 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 fiber composite beam structure 1, the tail of the bolt 9 is provided with a nut, the nut tightly presses the inner side face of the fiber composite 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 fiber composite beam structure 1, and the lamination of the laminated structure is avoided.

Further, 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 mounting hole from being peeled off in the normal direction, spacers 10 are further mounted on the outer circumferential surfaces of both ends of the screw fastener so as to be in contact with the inner and outer sides of the fiber composite material beam structure 1, respectively. Taking the threaded fastener as the bolt 9 as an example, the gasket 10 is respectively arranged between the head of the bolt 9 and the outer side surface of the fiber composite beam structure 1 and between the nut and the inner side surface of the fiber composite beam structure 1.

Through the arrangement of the threaded fastener, the structural stability of the laminated structure can be effectively improved. In the preferred embodiment of the present invention, the mounting holes are disposed at the periphery of the through holes 17, and more preferably, the through holes 17 are spaced along the longitudinal middle portion of the fiber composite beam structure 1, and the mounting holes are spaced along the edge portion of the fiber composite beam structure 1.

The cross section of the fiber composite beam structure 1 can be, for example, rectangular, circular, oval or other shapes, and the parameters such as the cross section size of the fiber composite beam structure 1 can be designed according to the arm support requirements of different engineering mechanical equipment, and the embodiment of the utility model provides a do not specifically limit here.

The inventor of the present 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 fiber composite beam structure 1 mainly bears the self weight of the arm support and the bending moment and the torque generated by the load, and the stress state of each side surface is different. Taking the cross section of the fiber composite beam structure 1 as a rectangle as an example, in the operation process, the upper side surface and the lower side surface of the fiber composite 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 fiber composite beam structure 1 on different sides, the mechanical property of the fiber composite beam structure 1 is improved, and the service life of the fiber composite beam structure is prolonged. In the preferred embodiment of the present invention, referring to fig. 20, the fiber angle laid on the upper and lower surfaces of the fiber composite beam structure 1 is a first angle α 1; referring to fig. 19, the fiber angle laid on both left and right surfaces of the fiber composite 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 fibre composite beam structure 1.

Wherein the first angle α 1 is smaller than the second angle α 2. The inventor of the application finds in research that the mechanical property and the service life of the fiber composite beam structure 1 can be better improved by selecting the first angle alpha 1 of fiber laying to be more than or equal to 0 degrees and less than or equal to alpha 1 and less than 45 degrees, and selecting the second angle alpha 2 to be more than or equal to 45 degrees and less than or equal to alpha 2 and less than or equal to 90 degrees. 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 fiber composite beam structure 1 refer to two side surfaces along the horizontal direction when the fiber composite beam structure 1 is in the horizontal state in the operation process; the left side and the right side of the fiber composite beam structure 1 refer to two sides in the vertical direction when the fiber composite beam structure 1 is in the horizontal state in the operation process.

Based on the embodiment of the utility model provides a fibre clad material beam structure 1 that first aspect provided, the utility model provides an arm festival is provided to the second aspect, the arm festival includes according to the utility model provides a first aspect fibre clad material beam structure 1.

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

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

The positioning connection mode of the metal connection structure 14 and the fiber composite beam structure 1 is as described above, for example, the two may be connected by a pin, a threaded fastener such as a bolt 9, a rivet, etc. when the pin is connected, a through hole 17 needs to be formed in the fiber composite beam structure 1, and a hollow reinforcing connector is assembled in the through hole 17, the assembling mode of the hollow reinforcing connector is as described above, and will not be described herein any more, and the metal connection structure 14 is positioned outside the connection portion of the fiber composite beam structure 1 by a pin which is interference-assembled in the hollow reinforcing connector. As mentioned before, the through holes 17 may be spaced apart along the longitudinal direction of the fibre composite beam structure 1. When the screw fastener is used for connection, a screw fastener mounting hole 18 needs to be formed in the fiber composite beam structure 1, the metal connecting structure 14 is positioned on a connecting portion of the fiber composite beam structure 1, for example, an outer side surface of the connecting portion, by the screw fastener penetrating through the screw fastener mounting hole 18, the screw fastener may be, for example, a bolt 9, and the screw fastener mounting hole 18 may be located on the periphery of the through hole 17.

In another embodiment of the arm section, as shown in fig. 2 to 3, an end portion of the fiber composite beam structure 1 is formed to have an end bend 2, the fiber composite beam structure 1 is divided in a longitudinal direction into a linearly extending beam body and an end bend 2 formed integrally with the beam body and smoothly extending from the end portion of the beam body to one side in a direction deviating from the linear extension of the beam 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 fiber composite beam structure 1 is formed with the end elbow 2, the 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 through-hole 17 on tip elbow 2, improve through-hole 17's wear resistance, reduce through-hole 17 thickness direction stress concentration degree to improve through-hole 17's bearing reliability.

Further, the hollow reinforcing connecting members are assembled in the through holes 17, and the more detailed configuration and technical effects of the hollow reinforcing connecting members are referred to the above description and will not be described herein again.

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 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 body and opening a through hole 17 for hinge-connecting the driving element in the portion where the metal connection linings 7 are embedded. In one embodiment, the driving element hinge portion 5 extends to the side of the end bend 2 in a direction deviating from the linear extension direction of the beam body, a through hole 17 is formed at a position deviating from the longitudinal direction of the beam body of the driving element hinge portion 5, and a hollow reinforcing connecting member is assembled in the through hole 17.

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 through hole 17 on the hinged part 5 of the driving element through a pin, the other end of the hydraulic oil cylinder 4 is hinged with one end of the connecting rod 3, and the other end of the connecting rod 3 is hinged with a through hole 17 on the end elbow 2 of the fiber composite material beam structure 1 through a pin. 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.

Because the load that the tip elbow 2 position of fibre clad material beam structure 1 bore is great relatively, is the weak part of fibre clad material beam structure 1, for the structural strength who improves fibre clad material beam structure 1, in the utility model discloses preferred embodiment, install on the tip elbow 2 of fibre clad material beam structure 1 and be used for strengthening the tip apron 6 of the intensity of fibre clad material beam structure 1.

As shown in fig. 9, an end 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 over the curved surface on the back side of the end bend 2.

Taking fig. 5 as an example, the end cover plate 6 covers the upper side surface of the end elbow 2, so that the strength, rigidity and stability of the fiber composite beam structure 1 can be increased. The end cover plate 6 may be connected to the fibre composite beam structure 1 by gluing, bolts 9, etc. when the end cover plate 6 is positioned on the end bend 2 of the fibre composite beam structure 1 by the selected bolts 9, its bolts 9 may be shared by the bolts 9 at the edge of the end bend 2. In other words, by installing the bolts 9 at the edge portions of the end elbows 2, the bolts 9 can position the end 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 layer 8 and the metal connecting lining 7 on the end elbows 2 are prevented from being laminated, thereby achieving two purposes.

The shape of the end cover plate 6 is adapted to the shape of the end elbow 2 of the fiber composite beam structure 1, taking the cross section of the end elbow 2 as a rectangle as an example, the end cover plate 6 comprises 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 transverse sides of the curved plate and capable of being respectively attached to the side walls of the two transverse sides of the end elbow 2.

A plurality of first bolt holes are formed in the vertical flange, and in addition, a plurality of second bolt holes are formed in the edge portions of the side walls on the two lateral sides of the end portion elbow 2 corresponding to the first bolt holes in the vertical flange, and the first bolt holes and the second bolt holes are communicated with each other, so that the end portion cover plate 6 can be positioned on the back surface of the end portion elbow 2 of the fiber composite beam structure 1 by bolts 9 penetrating through the first bolt holes and the second bolt holes.

The end 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 end cover plate 6 is structured as shown in fig. 9, and the specific parameters such as the size and the like are determined according to the design.

Based on the embodiment of the utility model provides an arm festival that the second aspect provided, the embodiment of the utility model provides a third aspect provides an arm support, the arm support includes that a plurality of articulates the arm festival of establishing ties in order to fold and expand in proper order, the arm festival is according to the utility model provides an embodiment second aspect the arm festival.

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 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 through holes 17 are respectively formed in the end elbows 2 of the fiber composite beam structure 1 of the first arm section and the second arm section, hollow reinforcing connecting members are respectively installed in the two through holes 17, the configuration mode of the hollow reinforcing connecting members refers to the foregoing, and one of the through holes 17 is closer to the end of the fiber composite beam structure 1. Wherein the through hole 17 of the first arm section closer to the end is hinged to the through hole 17 of the second arm section closer to the end by a pin. And, another through-hole 17 of the first arm section is articulated with one end of the first connecting rod 3, another through-hole 17 of the second arm section is articulated with one end of the second connecting rod 3, the other end of the first connecting rod 3 and the other end of the second connecting rod 3 are articulated with each other, and the articulated end is articulated with one end of the hydraulic cylinder 4, the other end of the hydraulic cylinder 4 is articulated on the position between the two ends of the first arm section or the second arm section.

When hydraulic cylinder 4 is flexible, can drive connecting rod 3 through hydraulic cylinder 4 and rotate, further drive first arm festival or second arm festival through connecting rod 3 and rotate to realize folding and expansion between two adjacent arm festival.

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 action of the arm support is controlled.

The metal connecting structure 14 comprises a metal sheet, the metal sheet is provided with a contact surface attached to the outer surface of the fiber composite beam structure 1, and the metal sheet is positioned on the outer surface of the fiber composite beam structure 1 through a first connecting piece penetrating through the metal sheet and the side wall of the fiber composite beam structure 1; specifically, a through hole 17 is formed in the fiber composite beam structure 1 along the wall thickness direction, a hollow reinforcing connecting member, such as a shaft sleeve 11 having pressing rings 12 formed at both ends thereof, is fitted in the through hole 17, the shaft sleeve 11 is interference-fitted in the through hole 17, and the first connecting member, such as a pin, is interference-fitted in the shaft sleeve 11, and is used for positioning the metal connecting structure 14 on the side wall of the fiber composite 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, a hollow reinforced connecting piece for connecting the metal connecting structure 14 with the fiber composite beam structure 1 and a pin shaft for connecting the connecting rod 3 with the arm section exist in the through hole 17 for penetrating through the first connecting piece; at this time, the hollow reinforced connector bears the shearing action between the metal connecting structure 14 and the fiber composite beam structure 1, and the pin shaft bears the shearing action between the arm section and the connecting rod 3, namely, the through hole 17 has double shearing action.

When the first connecting rod 3 or the second connecting rod 3 is connected to other positions of the arm section, the through hole 17 penetrating the first connecting piece does not bear double shearing action between the metal connecting structure 14 and the fiber composite beam structure 1 and between the arm section and the connecting rod 3.

The utility model discloses in the preferred embodiment, the cross section of fibre clad material beam structure 1 is the rectangle, all installs sheet metal in the left and right sides of fibre clad material beam structure 1, is provided with four connecting rods 3 between first arm festival and the second arm festival altogether, and these four connecting rods 3's wherein one end is articulated through same round pin axle to articulated with drive element, through the motion of four connecting rods 3 of drive element drive, thereby realize the motion of cantilever crane.

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 between the 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 the two ends of the arm section. The metal connecting structure 14 comprises metal sheets positioned at the left and right sides of the fiber composite beam structure 1, wherein the two metal sheets extend outwards in a direction deviating from the longitudinal direction of the fiber composite beam structure 1, so that a hinge part deviating from the longitudinal direction of the fiber composite beam structure 1 is formed, hinge holes are formed in the hinge part, the hinge holes of the two metal sheets are communicated through a shaft sleeve, meanwhile, one end of a driving element is hinged with the shaft sleeve, and the other end of the driving element is hinged with a common hinge end of the four connecting rods 3.

Based on the embodiment of the utility model provides an cantilever crane that third aspect provided, the embodiment fourth aspect provides a mechanical equipment, and this mechanical equipment includes the cantilever crane, and this cantilever crane is according to the embodiment of the utility model provides an cantilever crane that third aspect provided. 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 present invention provides a method for manufacturing an arm section including a fiber composite 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, in order to improve the production efficiency of the fiber composite 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, winding the other 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 connecting lining 7 to more uniformly transmit the load borne by the fiber composite beam structure 1 to the metal connecting structure 14, the stress concentration between the metal connecting lining 7 and the fiber composite layer 8 of the fiber composite layer part is reduced, and the service life and the reliability of the connection are improved. The utility model discloses in the preferred embodiment, pre-buried multilayer metal connection inside lining 7 in the thickness direction of the lateral wall of fibre clad material beam structure 1.

In order to achieve the above object, the embodiment of the present invention further includes, after the step 3: the steps 2 to 3 are cyclically performed so that the fiber composite layers 8 and the metal connecting linings 7 are alternately stacked in the wall thickness direction of the fiber composite beam structure 1 and the number of layers in which the metal connecting linings 7 are embedded reaches a predetermined number of layers, typically at least two layers.

As described above, in order to improve the production efficiency of the fiber composite beam structure 1 and reduce the manufacturing cost of the fiber composite beam structure 1, in the preferred embodiment of the present invention, the fiber composite layer 8 is formed by winding the fibers 13.

In order to enable an automated production of a fibre composite beam structure 1 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 fiber composite beam structure 1 formed by the winding method, after the fiber composite beam structure 1 is used to form the arm sections, the metal connecting structure 14 needs to be installed on the outer side of the fiber composite beam structure 1 after the fiber composite 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 sections and the driving element.

Referring to fig. 2-3, to make this type of arm segment, referring to fig. 12-15, the core film includes not only the beam body core film 15, but also a hinge point core film 16 for indicating the connection point of the fiber composite 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 point core films 16 is related to the specific type of arm segment, as shown in fig. 13. in a preferred embodiment of the present invention, a plurality of hinge point core films 16 are spaced apart in the longitudinal direction of the beam body core film 15 and are mounted on the same side of the beam body core film 15 for molding the end bends 2 and/or the drive element hinges 5 of the fiber composite beam structure 1.

As shown in fig. 2 to 3, the fiber composite beam structure 1 is divided into a beam body extending linearly in a 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 is used for being hinged with another arm section so that the adjacent two arm sections can be folded or unfolded under the driving force, and the metal connecting lining 7 is 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 fibre composite beam structure 1 of the type described above, it is necessary to mount a hinge point core membrane 16 on the same side of the beam body core membrane 15, since both the drive element hinge 5 and the end bend 2 deviate 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 fiber composite layer 8 on the fiber composite beam structure 1 at the same angle can be easily achieved by the winding manner described above. However, for the fiber composite 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 layers 8 with different angles can be laid on different sides.

For example, in the case of the fiber composite 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 core film is 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 is aligned at the second angle α 2 when the core film is rotated until the fibers 13 are laid on both the left and right sides. In order to solve the positioning problem of the fiber 13 during winding and laying on different sides, it can be considered that positioning nodes are arranged on different side walls of the fiber composite beam structure 1 according to a desired fiber laying angle, the fiber 13 is positioned through the positioning nodes, and fiber laying at different angles on different side walls of the fiber composite beam structure 1 is realized.

In addition, if the setting program of the winding device is not changed, one or more layers of fiber composite materials with a second angle alpha 2 can be independently laid on the left side and the right side of the fiber composite material beam structure 1 after the filament winding head reciprocates once along the axial direction of the core film in a mode that the fiber laying angle is the first angle alpha 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 fiber composite material 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 fiber composite 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 number of piles of the fibre composite material of first angle alpha 1 and the proportion of the number of piles of the fibre composite material of second angle alpha 2 on same side can be adjusted as required, the embodiment of the utility model provides a do not do the injecing to this.

Wherein the fibre lay angle indicates the angle between the fibres 13 and the longitudinal direction of the fibre composite beam structure 1. The first angle α 1 is smaller than the second angle α 2. The inventor of the application finds in research that the mechanical property and the service life of the fiber composite beam structure 1 can be better improved by selecting the first angle alpha 1 of fiber laying to be more than or equal to 0 degrees and less than or equal to alpha 1 and less than 45 degrees, and selecting the second angle alpha 2 to be more than or equal to 45 degrees and less than or equal to alpha 2 and less than or equal to 90 degrees. 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 fiber composite beam structure 1 needs to be further subjected to a curing process. Specifically, the fiber composite beam structure 1 may be placed in a curing oven for curing by heating, such as microwave or infrared.

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

More specifically, as shown in fig. 22, the beam body core film 15 is removed from the cured fiber composite beam structure 1 along the longitudinal direction of the fiber composite beam structure 1. As shown in fig. 23, after the beam body core film 15 is removed, the hinge point core film 16 is taken out from the cured fiber composite beam structure 1 from the bottom to the top, and the hinge point core film 16 is removed from the two end ports.

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 fiber composite beam structure 1 after the core film is removed is shown in fig. 24, and the fiber composite beam structure 1 is only a semi-finished product at this time, has no end elbow 2, and cannot be used as an arm section. In order to form the arm segment, the end portion of the fiber composite beam structure 1 shown in fig. 24 needs to be cut according to the shape and specification of the end portion elbow 2 of the arm segment, and as shown in fig. 25, the portion surrounded by the dotted lines at both ends of the fiber composite beam structure 1 is removed, so that the end portion elbow 2 of the fiber composite beam structure 1 is formed. The cutting mode can adopt any cutting direction such as mechanical cutting, water cutting, ultrasonic cutting or laser cutting.

The shape of the cut fiber composite beam structure 1 is shown in fig. 26. The two ends and the middle part of the fiber composite 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 with other components, a through hole 17 needs to be formed in the laminated structure along the wall thickness direction of the fiber composite beam structure 1, and in order to enhance the connection strength of the through hole 17, a hollow reinforcing connecting member, such as a sleeve 11, may be assembled in the through hole 17, and compression rings 12 are formed at both ends of the sleeve 11 to compress the inner and outer sides of the fiber composite beam structure 1.

In addition, since the laminated structure is formed by alternately laminating the fiber composite layers 8 and the metal connecting linings 7 along the wall thickness direction of the fiber composite 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 the action of external force. In order to strengthen the structural stability of the laminated structure, in the preferred embodiment of the present invention, the laminated structure is further provided with mounting holes, the mounting holes are preferably distributed at the periphery of the through holes 17, and the mounting holes may be, for example, threaded fastener mounting holes 18.

The more detailed mode of setting and the effect of through-hole 17 and threaded fastener mounting hole 18 can refer to the embodiment of the utility model provides a first aspect fibre clad material beam structure 1, no longer repeated here.

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

Through the end cover plate 6, on one hand, the stress strength of the fiber composite beam structure 1 can be enhanced, on the other hand, the fiber composite on the cutting surface of the fiber composite beam structure 1 can be prevented from being stripped normally, and the structural stability of the fiber composite 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 details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection 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. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims

1. The utility model provides a fibre combined material beam structure which characterized in that, the fibre combined material beam structure is last to offer the through-hole that is used for the connection along the wall thickness direction, coaxial assembly has the cavity to strengthen the connecting piece in the through-hole, be formed with respectively on the outer peripheral face at cavity strengthen the connecting piece both ends with the hole edge position looks butt of the axial both ends of through-hole is in order to stop the locating part of cavity strengthen the connecting piece axial translation.

2. The fiber composite beam structure according to claim 1, wherein the limiting member is a pressing ring, and the pressing ring abuts against the hole edge portions at the two axial ends of the through hole to prevent the fiber composite at the hole edge portions from being peeled off in the normal direction.

3. The fiber composite beam structure of claim 1 wherein the hollow reinforcement connectors are bushings, the hollow reinforcement connectors being axially non-rotatably fitted in the through holes, the through holes being spaced apart along a longitudinal direction of the fiber composite beam structure.

4. The fiber composite beam structure according to claim 1, wherein the fiber composite beam structure comprises a fiber composite layer portion and metal connecting linings embedded in the fiber composite layer portion, a plurality of layers of the metal connecting linings are arranged along the wall thickness direction of the fiber composite layer portion, two adjacent layers of the metal connecting linings are separated from each other through the fiber composite layer of the fiber composite layer portion, and the through holes are formed in the fiber composite beam structure at positions where the metal connecting linings are embedded.

5. A fibre composite beam structure according to claim 4, wherein the metal connecting linings are spaced apart in the longitudinal direction of the fibre composite beam structure.

6. The fiber composite beam structure according to claim 4, wherein mounting holes are further formed at positions of the fiber composite beam structure where the metal connecting linings are pre-embedded, and the mounting holes are distributed on the periphery of the through holes; the 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.

7. The fiber composite beam structure according to claim 6, wherein the cross section of the fiber composite beam structure is rectangular, two opposite sides of the rectangular cross section correspond to the side walls of the fiber composite beam structure, and the fiber laying angle of the fiber composite layer part is a first angle; on the side wall of the fiber composite beam structure corresponding to the other two opposite sides of the rectangular cross section, the fiber laying angle of the fiber composite 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.

8. The fiber composite beam structure according to claim 7, wherein the first angle has a value ranging from 0 ° to 45 °; the value range of the second angle is 45-90 degrees.

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

10. An arm support, characterized in that, the arm support includes a plurality of articulated arm section that establishes ties in order can fold and expand in proper order, the arm section be according to claim 9 arm section.

11. Mechanical equipment, characterized in that the mechanical equipment comprises a boom, wherein the boom is according to claim 10.