CN212453677U - Arm support, arm support assembly and operation machine - Google Patents

Abstract

The utility model provides an cantilever crane, jib subassembly and operation machinery, wherein, the cantilever crane includes: the body comprises a first body part and a second body part, wherein the first body part and the second body part surround a box-shaped structure, and the first body part and the second body part are mutually overlapped. Through the technical scheme of the utility model, when realizing cantilever crane lightweight design, adopted split type structural design, be favorable to simplifying the mould of cantilever crane body, promote the mould commonality, improved the inconsistent condition of cantilever crane heat altered shape, the later maintenance of still being convenient for.

Description

Arm support, arm support assembly and operation machine

Technical Field

The utility model relates to a mechanical equipment technical field particularly, relates to an cantilever crane, a cantilever crane subassembly and an operation machinery.

Background

At present, most of arm supports of concrete pump trucks are mainly of steel structures, light weight design is not facilitated, and the length of the arm supports is close to the limit. The research on the lightweight arm support mainly uses carbon fiber composite materials and aluminum alloy, but at present, the research on the lightweight arm support mainly uses the integral forming of a single material, such as a pure carbon fiber composite arm support and a carbon fiber foam sandwich composite arm support, but the integrally formed arm support of the single material has the disadvantages of complex mold, long investment time for early-stage process verification, low efficiency, poor mold universality, difficult batch production, and large material waste because the mold needs to be readjusted every time the structure is optimized, and the arm support can only be integrally replaced once the collision occurs.

Some arm supports also adopt a composite structure, but because the structural parts of the large end, the small end and the oil cylinder seat of the arm support are generally stressed in a complex way, and the difference of the thermal expansion coefficients of different materials in the composite structure is large, the phenomenon of inconsistent thermal deformation can occur under the condition of large temperature difference of a working environment, so that prestress is generated in an arm support box body, and the arm support box body even bulges when the condition is serious.

SUMMERY OF THE UTILITY MODEL

Embodiments according to the present invention are directed to solving at least one of the technical problems existing in the related art or the related art.

In view of this, an object of the embodiments of the present invention is to provide an arm support.

It is another object according to an embodiment of the present invention to provide a boom assembly.

It is another object according to an embodiment of the present invention to provide a work machine.

In order to achieve the above object, according to the utility model discloses an embodiment of first aspect provides an arm support, has the box structure, and the arm support includes: the body comprises a first body part and a second body part, wherein the first body part and the second body part surround a box-shaped structure, and the first body part and the second body part are mutually overlapped.

In this technical scheme, first body portion and second body portion overlap each other, and first body portion and second body portion are split type structure promptly. The first body part and the second body part can be separately molded and then assembled together. The split structure is favorable for greatly simplifying the mold for production and improving the mold universality. When the structure of the arm support is changed, the die does not need to be adjusted every time, so that the early-stage research and development time is favorably shortened, the later-stage production efficiency is favorably improved, and the mass production of the arm support is facilitated. In addition, adopt split type structure, when damage such as take place to collide with in first body portion and second body portion, only need change one of damage, need not be to the whole changes of body, be favorable to save material, reduce extravagantly.

Furthermore, the first body part and the second body part are mutually overlapped, so that the first body part and the second body part are favorably fixed in a mode without thermal processing such as mechanical connection, namely, when the first body part and the second body part are mutually fixedly connected, no thermal processing exists, and the reduction of thermal deformation or high-temperature damage of the first body part and the second body part is favorably realized. The overlapping mode also allows the first body part and the second body part to have a small amount of inconsistent deformation, namely the first body part and the second body part can adopt different material bodies, which is beneficial to improving the convenience of material selection of the first body part and the second body part.

In the technical scheme, the first body part comprises a first transverse plate, a first side plate and a second side plate which are integrally formed, the first side plate and the second side plate are respectively positioned on two sides of the first transverse plate, and the first side plate, the first transverse plate and the second side plate form a U-shaped structure; the second body part comprises a second transverse plate, a third side plate and a fourth side plate which are integrally formed, the third side plate and the fourth side plate are respectively positioned on two sides of the second transverse plate, and the third side plate, the second transverse plate and the fourth side plate form a U-shaped structure; the first side plate is overlapped with the third side plate, and the second side plate is overlapped with the fourth side plate.

In the above technical scheme, first noumenon includes first diaphragm, first curb plate and second curb plate, and noumenon includes second diaphragm, third curb plate and fourth curb plate, simple structure, easily overlap joint. The first body part and the second body part are respectively integrally formed, so that the strength of the first body part and the second body part is favorably ensured, the process is simplified, and the installation speed is increased. The first body part and the second body part are respectively U-shaped, and the lap joint is convenient.

In the above technical solution, at least one of the first side plate and the third side plate is provided with a limiting part, and/or at least one of the second side plate and the fourth side plate is provided with a limiting part; the first body part and the second body part are abutted through the limiting part.

In this technical scheme, first noumenon portion and second noumenon portion offset through spacing portion, make overlap joint length between them can obtain reliable and stable restriction, when carrying out the overlap joint promptly, through spacing effect of spacing portion, make overlap joint length between them fixed, spacing portion sets up in which position, and overlap joint length just can arrive in which position. The setting of spacing portion can also play the effect of location, adopts connection methods such as bolt-on, riveting at first noumenon and second noumenon, fixes a position through spacing portion, is convenient for aim at the hole site, saves the assemble duration. In addition, the arrangement of the limiting part can also reduce the shearing force applied to the first body part and the second body part, and the working stability and reliability of the first body part and the second body part are improved.

It can be understood that, in the four of the first side plate, the second side plate, the third side plate and the fourth side plate, only one of the four side plates is provided with the limiting part, so that the purpose can be achieved.

In the above technical solution, the third side plate and the fourth side plate are respectively provided with a limiting part, the limiting part includes a butt step and a lap plate, the butt step of the third side plate abuts against the first side plate, the butt step of the fourth side plate abuts against the second side plate, the lap plate of the third side plate is overlapped with the first side plate, and the lap plate of the fourth side plate is overlapped with the second side plate; and/or the second side plate and the third side plate are/is provided with a limiting part, the limiting part comprises a butt joint step and a lap joint plate, the butt joint step of the third side plate is abutted against the first side plate, the butt joint step of the second side plate is abutted against the fourth side plate, the lap joint plate of the third side plate is in lap joint with the first side plate, and the lap joint plate of the second side plate is in lap joint with the fourth side plate.

In this technical scheme, spacing portion is including butt joint step and overlap joint board, makes mutual lapped curb plate can lean on through butt joint step counterbalance to realize overlap joint length's restriction, can also realize the mutual support between first noumenon portion and the second noumenon portion. The lapping plate of spacing portion is convenient for carry out the overlap joint with adjacent curb plate to it is fixed through mechanical connection and bonding between two adjacent curb plates, also do not need to carry out hot-working and can link together first this somatic part and second this somatic part.

Furthermore, the third side plate and the fourth side plate are provided with limiting parts, namely, the limiting parts are arranged on two sides of the second body part, so that the structure is symmetrical, and the first body part and the second body part are stressed uniformly. The second side plate and the third side plate are provided with limiting parts, namely, one side of the first body part is provided with the limiting part, so that the structure is simpler, the material can be saved, and the structure is simplified. The second body portion has a similar structure to the first body portion, and has similar or identical technical effects, which are not described herein again.

In any one of the above technical solutions, the first body portion and the second body portion are mechanically connected and bonded, and at least the first body portion is made of a carbon fiber material.

In the technical scheme, the first body part and the second body part are mechanically connected and bonded, so that the connection mode does not need heating, and when the connection is fixed, high temperature does not exist, the first connecting part and the second connecting part are not thermally deformed, the first body part and the second body part are favorably in a relatively light and thin structure, and the aim of lightening the body is fulfilled. Furthermore, the mechanical connection and the bonding are simultaneously adopted, so that the purpose of assembling and disassembling the first connecting part and the second body part can be realized, the replacement and the maintenance are easy to carry out when the body is damaged, the whole body is prevented from being replaced, and the material saving is facilitated. The mechanical connection and the bonding are simultaneously adopted, so that the connection strength between the first body part and the second body part is improved, and the possibility of looseness of the connection position is reduced. The mechanical connection means include, but are not limited to, bolting, riveting, clamping. At least the first body part is made of the carbon fiber material body, so that the strength of the arm support can be improved, the weight of the arm support is reduced, the power required for driving the arm support is reduced, and energy conservation and consumption reduction are facilitated.

In any one of the above technical solutions, the arm support further includes: a first connecting part detachably connected to one end of the body; a second connecting part detachably connected to the other end of the body; the first connecting part is in lap joint with the first body part and/or the second body part, and the second connecting part is in lap joint with the first body part and/or the second body part.

In the technical scheme, the first connecting part and the second connecting part are detachably connected with the body, so that the first connecting part and the second connecting part which are complex in structure are made of materials different from the body. When the first connecting part and the second connecting part break down or are damaged, only the damaged first connecting part or the damaged second connecting part is replaced, the whole arm support does not need to be maintained or replaced, and the convenience of arm support maintenance is improved. The first connecting part and the second connecting part are complex in stress condition and relatively complex in structure, correspondingly, the thermal deformation condition is relatively complex, the first connecting part and the second connecting part are connected in a detachable mode, and the stress transmission to the body is reduced, so that the deformation of the body is reduced. The first connecting part and the first body part and/or the second body part are/is in lap joint with each other, namely the first connecting part and the body are connected with each other and the second connecting part and the body are also in lap joint with each other, so that the first connecting part and the body can be effectively connected even if different material bodies are arranged between the first connecting part and the body and between the second connecting part and the body, and the flexibility and the convenience of material selection of the first connecting part and the second connecting part are improved.

In the above technical solution, the first connecting portion is connected to the first body portion and/or the second body portion by mechanical connection and/or adhesion; the second connecting part is connected with the first body part and/or the second body part through mechanical connection and/or adhesion.

In the technical scheme, the mechanical connection and/or bonding mode is easy to realize the purpose of being detachable between the first connection part and the body and the purpose of being detachable between the second connection part and the body. The mechanical connection means include, but are not limited to, bolting, riveting, clamping. It should be noted that the body includes a first body portion and a second body portion, and therefore, the connection between the first connecting portion, the second connecting portion and the body may be only connected with the first body portion of the body, only connected with the second body portion of the body, or connected with both the first body portion and the second body portion.

In the above technical solution, the arm support further includes: the supporting seat is arranged on the second connecting part and is provided with a connecting hole; at least one of the first connecting part, the second connecting part and the supporting seat is a steel product body.

In the technical scheme, the support base supports the arm support, and the stress of the support base is complex, so that the support base is arranged on the second connecting part, and the support base and the second connecting part can be replaced together when a fault or damage occurs, so that the support base is easy to maintain, and the whole arm support does not need to be replaced. The supporting seat is provided with a connecting hole which is convenient to be connected with a supporting structure on the operation machine through the connecting hole and a fastening piece, namely, the connecting mode can adopt mechanical connection, so that the supporting seat can adopt a material body different from the arm support and the supporting structure, the connecting process does not have hot processing, and the supporting seat and the arm support are not easy to deform. The support seat is connected through the connecting hole, the support seat can rotate around the connecting hole and a fastener in the connecting hole, and the moving range of the arm support is enlarged. At least one of first connecting portion, second connecting portion and supporting seat sets up to the steel plastid, is favorable to ensureing the intensity of first connecting portion or second connecting portion or supporting seat to guarantee the reliability of first connecting portion, second connecting portion, supporting seat work. On the other hand, the raw materials of the steel are easy to obtain, so that the method is convenient for mass production, is also convenient for exchanging with the existing arm support, has good universality, is favorable for saving parts and materials, and reduces waste.

According to the utility model discloses the embodiment of second aspect provides an arm frame subassembly, including the mutual articulated first cantilever crane of multisection, at least one section first cantilever crane is the cantilever crane of any one technical scheme in above-mentioned first aspect.

In the technical scheme, by adopting the arm support of any one of the technical schemes, all beneficial effects of the technical scheme are achieved, and further description is omitted; the first arm supports hinged to each other are convenient to rotate, and the operation range of the arm support assembly is enlarged beneficially in all directions of length, width and height.

According to a third aspect of the present invention, there is provided a working machine, comprising an arm support structure; the arm support in any one of the above technical solutions of the first aspect is connected with an arm support structure; or the arm support assembly according to any of the above second aspects, is connected to the arm support structure.

In this technical solution, by using the arm support according to any one of the above technical solutions of the first aspect, all beneficial effects of any one of the above technical solutions of the first aspect are achieved, and details are not repeated herein. By adopting the arm support assembly according to any one of the above second aspects, all the beneficial effects of any one of the above second aspects are achieved, and details are not repeated herein. By arranging the arm support supporting structure, the support is conveniently provided for the arm support or the arm support assembly, and the stability and the reliability of the operation of the arm support are favorably ensured.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic front view of an arm support according to an embodiment of the present invention;

FIG. 2 is a schematic sectional view taken along line A-A in FIG. 1;

fig. 3 is a schematic top view of the boom according to an embodiment of the present invention;

fig. 4 is a schematic perspective view of a first connection portion of the boom according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a second connecting portion of the boom according to an embodiment of the present invention;

fig. 6 is a block diagram schematic construction of a boom assembly in accordance with an embodiment of the present invention;

fig. 7 is a block diagram schematically illustrating the structure of a working machine according to an embodiment of the present invention;

fig. 8 is a block diagram schematically illustrating the structure of a working machine according to an embodiment of the present invention;

fig. 9 is a schematic cross-sectional structural view of a body of an arm support according to an embodiment of the present invention;

fig. 10 is a schematic cross-sectional structural view of a body of an arm support according to an embodiment of the present invention;

fig. 11 is a schematic cross-sectional structural view of a body of an arm support according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 11 is:

1: a boom; 10 a body; 100: a first body portion; 1000: a first transverse plate; 1002: a first side plate; 1004: a second side plate; 102: a second body portion; 1020: a second transverse plate; 1022: a third side plate; 1024: a fourth side plate; 104: a limiting part; 1040: butting the steps; 1042: a lap plate; 12: a first connection portion; 120: mounting holes; 14: a second connecting portion; 16: a supporting seat; 160: connecting holes; 2: an arm support assembly; 20: a first arm support; 3: a working machine; 30: arm support supporting structure.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings, which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Some embodiments of the present invention are described below with reference to fig. 1 to 11.

As shown in fig. 1 to 5, the arm support 1 according to an embodiment of the present invention has a box-type structure, and the arm support 1 includes: the body 10, the body 10 includes a first body portion 100 and a second body portion 102. The first body portion 100 and the second body portion 102 enclose a box-type structure, wherein the first body portion 100 and the second body portion 102 are overlapped with each other.

In this embodiment, the first body portion 100 and the second body portion 102 overlap each other, i.e., the first body portion 100 and the second body portion 102 are a split structure. The first body 100 and the second body 102 may be formed separately and then assembled together by connecting the two together by means of an overlapping joint. The split structure is favorable for greatly simplifying the mold for production and improving the mold universality. When the structure of the arm support 1 is changed, the die does not need to be adjusted every time, so that the early-stage research and development time is favorably shortened, the later-stage production efficiency is favorably improved, and the mass production of the arm support 1 is facilitated. In addition, by adopting a split structure, when one of the first body part 100 and the second body part 102 is damaged, such as collision, only one of the damaged parts needs to be replaced, and the whole body 10 does not need to be replaced, which is beneficial to saving materials and reducing waste.

Further, the first body part 100 and the second body part 102 are mutually overlapped, which is beneficial for the two parts to be fixed in a mode of mechanical connection and the like without hot processing, that is, when the first body part 100 and the second body part 102 are mutually fixedly connected, no hot processing exists, which is beneficial for reducing the thermal deformation or high temperature damage of the two parts, therefore, the first body part 100 and the second body part 102 can adopt a thinner structure corresponding to the connection mode of non-hot processing, thereby being beneficial for reducing the weight of the arm support 1 and realizing the purpose of lightening the arm support 1. The overlapping manner also allows a small amount of deformation inconsistency between the first body portion 100 and the second body portion 102, that is, the first body portion 100 and the second body portion 102 may be made of different materials, which is beneficial to improving the convenience of material selection between the first body portion 100 and the second body portion 102.

As shown in fig. 2, in the above embodiment, the two sides of the second body portion 102 are provided with the position-limiting portions 104, and the first body portion 100 and the second body portion 102 are abutted by the position-limiting portions 104.

Specifically, the first body 100 includes a first horizontal plate 1000, a first side plate 1002 and a second side plate 1004 which are integrally formed. The first side plate 1002 and the second side plate 1004 are respectively located at two sides of the first horizontal plate 1000, and the first side plate 1002, the first horizontal plate 1000 and the second side plate 1004 form a U-shaped structure. The second body portion 102 includes a second cross plate 1020, a third side plate 1022 and a fourth side plate 1024 which are integrally formed. The third side plate 1022 and the fourth side plate 1024 are respectively located at both sides of the second transverse plate 1020, and the third side plate 1022, the second transverse plate 1020 and the fourth side plate 1024 form a U-shaped structure. The first side panel 1002 overlaps the third side panel 1022 and the second side panel 1004 overlaps the fourth side panel 1024. Two sides of the second body 102, namely the third side plate 1022 and the fourth side plate 1024, are respectively provided with a position-limiting portion 104.

Further, the stop 104 includes an abutment step 1040 and a lap plate 1042. The abutment step 1040 on the third side panel 1022 abuts the first side panel 1002, and the abutment step 1040 on the fourth side panel 1024 abuts the second side panel 1004. The overlapping plate 1042 of the third side plate 1022 overlaps the first side plate 1002, and the overlapping plate 1042 of the fourth side plate 1024 overlaps the second side plate 1004.

In this embodiment, the first body portion 100 and the second body portion 102 are abutted by the stopper portion 104, so that the overlapping length therebetween can be stably and reliably limited, that is, when the overlapping is performed, the overlapping length therebetween is fixed by the stopper action of the stopper portion 104, and the abutting step 1040 of the stopper portion 104 is provided at which position, and the overlapping length can reach which position. The limiting part 104 can also play a role in positioning, and when the first body part 100 and the second body part 102 are connected in a bolting mode, a riveting mode and the like, the limiting part 104 is used for positioning, so that hole positions can be aligned conveniently, and the assembling time is saved. In addition, the arrangement of the limiting portion 104 can also reduce the shearing force applied to the first body portion 100 and the second body portion 102, thereby improving the stability and reliability of the two operations.

As shown in fig. 2, more specifically, the first body portion 100 and the second body portion 102 are respectively U-shaped in cross section, and when they are assembled, the U-shaped first body portion 100 and the U-shaped second body portion 102 are engaged with each other to form the box-shaped body 10, so that the production and assembly are convenient, and the assembly efficiency is high, and when one of the first body portion 100 and the second body portion 102 is damaged, the damaged one can be replaced.

As shown in fig. 9, in other embodiments, only one side of the second body portion 102 is provided with the position-limiting portion 104, that is, only the third side plate 1022 of the second body portion 102 is provided with the position-limiting portion 104.

As shown in fig. 10, in still other embodiments, a side of the first body 100 and a side of the second body 102 are respectively provided with a position-limiting portion 104. Specifically, the second side plate 1004 of the first body portion 100 is provided with the position-limiting portion 104, and the third side plate 1022 of the second body portion 102 is provided with the position-limiting portion 104.

As shown in fig. 9 and 10, the bridging plate 1042 of the position restricting portion 104 of the third side plate 1022 and the third side plate 1022 are not coplanar but are parallel to each other.

As shown in fig. 11, in some embodiments, the strap 1042 of the position-limiting portion 104 is coplanar with the corresponding side panel, e.g., the strap 1042 on the position-limiting portion 104 of the third side panel 1022 and the third side panel 1022 are themselves coplanar; the abutment step 1040 projects from one side of the corresponding side plate to the other, like an extended platform.

In any of the above embodiments, the first body 100 and the second body 102 are mechanically connected and bonded, and during the connection and fixation, no heating is needed, and no high temperature exists, so that the first connection portion 12 and the second connection portion 14 are not thermally deformed, which is beneficial for the first body 100 and the second body 102 to adopt a thinner structure, thereby achieving the purpose of light weight of the body 10. Further, the mechanical connection and adhesion can also achieve the purpose of being detachable between the first connecting part 12 and the second body part 102, so that when damage occurs, replacement and maintenance are easy, the body 10 is not replaced completely, and material saving is facilitated. The mechanical connection means include, but are not limited to, bolting, riveting, clamping.

In any of the above embodiments, the first body 100 is made of a carbon fiber material to improve the strength of the arm support 1 and reduce the weight of the arm support 1, so as to reduce the power required for driving the arm support 1, thereby being beneficial to energy saving and consumption reduction.

In some embodiments, the first body portion 100 and the second body portion 102, i.e. the body 10, are all of carbon fiber material. The body 10 is made of carbon fiber material, the first body part 100 and the second body part 102 are made of uniform material, the performance of all aspects of the body is the same, especially the thermal deformation performance is the same, under the condition of large temperature difference of a working environment, the phenomenon of thermal deformation inconsistency is avoided, the prestress in the body 10 of the arm support 1 is reduced, and the use safety of the arm support 1 is improved.

As shown in fig. 3, in any of the above embodiments, the arm support 1 further includes a first connection portion 12 and a second connection portion 14. The first connecting portion 12 is detachably connected to one end of the body 10. The second connecting portion 14 is detachably connected to the other end of the main body 10. The first connecting portion 12 and the second connecting portion 14, which have complicated structures, may be made of materials different from those of the body 10 in a detachable connection manner. When the first connecting portion 12 and the second connecting portion 14 are broken or damaged, only the damaged first connecting portion 12 or the damaged second connecting portion 14 is replaced, the whole arm support 1 does not need to be repaired or replaced, and convenience in maintenance and repair of the arm support 1 is improved. The first connecting portion 12 and the second connecting portion 14 are complicated in stress condition and relatively complicated in structure, and accordingly are complicated in thermal deformation, and the connecting manner of being detachably connected with the body 10 is also beneficial to reducing the transmission of stress to the body 10, so that the deformation of the body 10 is reduced.

Further, the first connection portion 12 is lap-jointed to the body 10. The second connecting portion 14 is lap-jointed to the body 10.

In some embodiments, the first connecting portion 12 overlaps the first body portion 100, and the first connecting portion 12 and the first body portion 100 are fixedly connected by mechanical connection and adhesion. The second connecting portion 14 overlaps the first body portion 100, and the second connecting portion 14 and the first body portion 100 are fixedly connected by mechanical connection and adhesion.

In other embodiments, the first connecting portion 12 overlaps the second body portion 102, and the first connecting portion 12 and the second body portion 102 are fixedly connected by mechanical connection and adhesion. The second connecting portion 14 overlaps the second body portion 102, and the second connecting portion 14 and the second body portion 102 are fixedly connected by mechanical connection and adhesion.

In other embodiments, the first connecting portion 12 overlaps with both the first body portion 100 and the second body portion 102, and the first connecting portion 12 is fixedly connected with both the first body portion 100 and the second body portion 102 by mechanical connection and adhesion. The second connecting portion 14 overlaps with both the first body portion 100 and the second body portion 102, and the second connecting portion 14 is fixedly connected with both the first body portion 100 and the second body portion 102 by mechanical connection and adhesion.

In other embodiments, the first connecting portion 12 overlaps with both the first body portion 100 and the second body portion 102, and the first connecting portion 12 is fixedly connected with both the first body portion 100 and the second body portion 102 by mechanical connection and adhesion. The second connecting portion 14 overlaps the first body portion 100, and the second connecting portion 14 and the first body portion 100 are fixedly connected by mechanical connection and adhesion.

In still other embodiments, the first connecting portion 12 overlaps with both the first body portion 100 and the second body portion 102, the first connecting portion 12 and the first body portion 100 are fixed by mechanical connection, and the first connecting portion 12 and the second body portion 102 are fixed by adhesion. The second connecting portion 14 overlaps with both the first body portion 100 and the second body portion 102, the second connecting portion 14 and the first body portion 100 are fixed by a mechanical connection method, and the second connecting portion 14 and the second body portion 102 are fixed by an adhesive method.

As shown in fig. 5, in the above embodiment, the arm support 1 further includes: and a support base 16 provided on the second connecting portion 14. The support base 16 is provided with attachment holes 160 to facilitate attachment to a support structure on the work machine. At least one of the first connecting portion 12, the second connecting portion 14, and the support base 16 is made of a steel material.

In this embodiment, the supporting seat 16 supports the arm support 1, and the stress is complex, so that the supporting seat is disposed on the second connecting portion 14, and is convenient to replace with the second connecting portion 14 in case of failure or damage, and the supporting seat is easy to maintain without replacing the whole arm support 1. At least one of the first connecting portion 12, the second connecting portion 14 and the support seat 16 is made of steel material, which is beneficial to ensuring the strength of the first connecting portion 12, the second connecting portion 14 or the support seat 16, thereby ensuring the working reliability of the first connecting portion 12, the second connecting portion 14 and the support seat 16. On the other hand, the raw materials of the steel are easy to obtain, so that the cantilever crane is convenient for mass production, is also convenient for exchanging with the existing cantilever crane 1, has good universality, is favorable for saving parts and materials, and reduces waste.

In some embodiments, the support base 16 is connected by a connection hole 160, a fastener, and a hydraulic ram, which may also be referred to as a cylinder base; the arm support 1 is convenient to lift or fall through the extension and the shortening of the hydraulic oil cylinder through the connection with the hydraulic oil cylinder.

As shown in fig. 6, according to an embodiment of the second aspect of the present invention, there is provided a boom assembly 2, comprising a plurality of sections of first booms 20 hinged to each other, wherein at least one section of the first boom 20 is the boom 1 of any one of the embodiments of the first aspect.

In this embodiment, by using the arm support 1 according to any one of the above embodiments, all the beneficial effects of the above embodiments are achieved, and are not described herein again; the first arm supports 1 which are hinged to each other are convenient to rotate, and the operation range of the arm support assembly 2 is enlarged beneficially in all directions of length, width and height.

In some embodiments, first boom 20 is all boom 1. In other embodiments, only part of the multi-section first boom 20 is the boom 1.

As shown in fig. 7, an embodiment according to a third aspect of the present invention provides a work machine 3, comprising a boom support structure 30; the boom 1 of any of the embodiments of the first aspect described above, is connected to a boom support structure 30; as shown in fig. 8, or the boom assembly 2 of any of the embodiments of the second aspect described above, is connected to a boom support structure 30.

In this embodiment, by using the arm support 1 according to any embodiment of the first aspect, all the beneficial effects of any embodiment of the first aspect are achieved, and details are not described herein. By adopting the arm support assembly 2 according to any one of the embodiments of the second aspect, all the advantages of any one of the embodiments of the second aspect are achieved, and the details are not repeated herein. By arranging the arm support supporting structure 30, the support is conveniently provided for the arm support 1 or the arm support assembly 2, and the stability and the reliability of the operation of the arm support 1 are favorably ensured.

The working machine 3 includes at least a concrete pump truck, a crane, a fire engine, and the like.

In some embodiments, the boom support structure 30 includes a base provided on a body of the concrete pump truck, the base being connected to the first connection portion 12 of the boom 1.

In other embodiments, the boom support structure 30 includes a hydraulic cylinder disposed on the body of the concrete pump truck, the hydraulic cylinder is connected to the support base 16 of the boom 1, and at this time, the support base 16 is a cylinder base.

According to the arm support 1 of a specific embodiment provided by the application, the technical scheme is as follows:

1) the large and small ends of the two ends of the arm support 1 and the oil cylinder seat are made of steel structures.

2) The middle box body of the arm support 1 adopts a pure carbon fiber structure and does not adopt a carbon and aluminum structure.

3) The steel structure and the carbon fiber structure are connected through mechanical connection and cementing.

As shown in fig. 1 and 3, it can be understood that the first connection portion 12 of the arm support 1 is a large head end, and the second connection portion 14 of the arm support 1 is a small head end. The body 10 of the arm support 1 is a middle box body. As shown in fig. 4 and 5, the large head end and the small head end are respectively provided with a plurality of mounting holes 120 to facilitate mechanical connection with the middle box body or the main body 10; the body 10 is made of carbon fiber material. As shown in fig. 3, the main body 10 includes an upper U-shaped carbon trough (a first main body 100) and a lower U-shaped carbon trough (a second main body 102) that are fastened and overlapped to form a box structure; the oil cylinder base is arranged on the small end, and the large end, the small end and the oil cylinder base are all steel structures.

It should be noted that in this embodiment, the support base 16 is a cylinder base, but the support base 16 is not limited to being a cylinder base.

The advantages of this embodiment are as follows:

1) the large head end, the small head end and the oil cylinder seat of the arm support are of steel structures, the large head end, the small head end and the oil cylinder seat can be exchanged with the existing steel arm support, the universality is good, meanwhile, the steel structures are fully verified, and the reliability is high.

2) The middle box body of the arm support adopts a pure carbon fiber structure (a carbon and aluminum structure is not adopted), so that the condition of inconsistent thermal deformation can be avoided.

3) Through mechanical connection + bonding between steel structure and the carbon fiber structure, the assembled structure is favorable to later stage fault maintenance, also is favorable to batch production simultaneously, finally realizes the purpose of cantilever crane lightweight design.

In other embodiments, the middle box structure (body 10) of the arm support may be formed by other structures, such as four plates made of carbon fiber material.

Above combine the figure to describe in detail the technical scheme of the utility model, through the utility model discloses a technical scheme has adopted split type structural design when realizing the design of cantilever crane lightweight, is favorable to simplifying the mould of cantilever crane body, promotes the mould commonality, has improved the inconsistent condition of cantilever crane heat altered shape, the later maintenance of still being convenient for.

In the present application, the terms "first", "second", are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or unit indicated must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An arm support, has box structure, its characterized in that, the arm support includes:

a body (10), the body (10) comprising a first body portion (100) and a second body portion (102), the first body portion (100) and the second body portion (102) enclosing the box-type structure,

wherein the first body portion (100) and the second body portion (102) overlap each other.

2. The boom of claim 1,

the first body part (100) comprises a first transverse plate (1000), a first side plate (1002) and a second side plate (1004) which are integrally formed, the first side plate (1002) and the second side plate (1004) are respectively positioned at two sides of the first transverse plate (1000), and the first side plate (1002), the first transverse plate (1000) and the second side plate (1004) form a U-shaped structure;

the second body part (102) comprises a second transverse plate (1020), a third side plate (1022) and a fourth side plate (1024) which are integrally formed, the third side plate (1022) and the fourth side plate (1024) are respectively positioned at two sides of the second transverse plate (1020), and the third side plate (1022), the second transverse plate (1020) and the fourth side plate (1024) form a U-shaped structure;

wherein the first side panel (1002) overlaps the third side panel (1022) and the second side panel (1004) overlaps the fourth side panel (1024).

3. The boom of claim 2,

at least one of the first side plate (1002) and the third side plate (1022) is provided with a limiting part (104), and/or at least one of the second side plate (1004) and the fourth side plate (1024) is provided with a limiting part (104);

the first body part (100) and the second body part (102) are abutted through the limiting part (104).

4. The boom of claim 3,

the third side plate (1022) and the fourth side plate (1024) are respectively provided with the limiting part (104), the limiting part (104) comprises a butt joint step (1040) and a lapping plate (1042), the butt joint step (1040) of the third side plate (1022) abuts against the first side plate (1002), the butt joint step (1040) of the fourth side plate (1024) abuts against the second side plate (1004), the lapping plate (1042) of the third side plate (1022) is lapped with the first side plate (1002), and the lapping plate (1042) of the fourth side plate (1024) is lapped with the second side plate (1004); and/or

The limiting part (104) is arranged on the second side plate (1004) and the third side plate (1022), the limiting part (104) comprises a butt joint step (1040) and a lapping plate (1042), the butt joint step (1040) of the third side plate (1022) abuts against the first side plate (1002), the butt joint step (1040) of the second side plate (1004) abuts against the fourth side plate (1024), the lapping plate (1042) of the third side plate (1022) is lapped with the first side plate (1002), and the lapping plate (1042) of the second side plate (1004) is lapped with the fourth side plate (1024).

5. The boom according to any of the claims 1 to 4,

the first body part (100) and the second body part (102) are mechanically connected and bonded, and at least the first body part (100) is made of carbon fiber material.

6. The boom according to any of claims 1-4, characterized in that further comprising:

a first connecting part (12) detachably connected to one end of the body (10);

a second connecting part (14) detachably connected to the other end of the main body (10);

wherein the first connecting part (12) and the first body part (100) and/or the second body part (102) overlap each other, and the second connecting part (14) and the first body part (100) and/or the second body part (102) overlap each other.

7. The boom of claim 6,

the first connecting part (12) is connected with the first body part (100) and/or the second body part (102) through mechanical connection and/or adhesion;

the second connecting part (14) is connected with the first body part (100) and/or the second body part (102) through mechanical connection and/or adhesion.

8. The boom of claim 6, further comprising:

the supporting seat (16) is arranged on the second connecting part (14), and a connecting hole (160) is formed in the supporting seat (16);

at least one of the first connecting portion (12), the second connecting portion (14) and the support seat (16) is a steel material body.

9. An arm support assembly comprises a plurality of sections of first arm supports which are hinged with each other, and is characterized in that,

at least one section of the first arm support (20) is as follows:

the boom (1) of any of the claims 1 to 8.

10. A work machine, comprising:

a boom support structure (30);

the boom (1) of any of claims 1 to 8, being connected to the boom support structure (30); or

The boom assembly (2) of claim 9, being connected to the boom support structure (30).

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