CN220247637U - Cantilever crane assembly and concrete machinery - Google Patents

Abstract

The utility model provides an arm support assembly and a concrete machine, wherein the arm support assembly comprises a metal hollow arm support and a fiber composite arm support which are sequentially hinged, the metal hollow arm support is arranged at one end, close to a turntable, of the metal hollow arm support, the fiber composite arm support is arranged at one end, far away from the turntable, of the metal hollow arm support, and the fiber composite arm support are box-shaped arm supports. According to the utility model, the metal hollow arm support and the fiber composite arm support are combined to replace a solid arm support, so that the total weight of the arm support is greatly reduced, the respective advantages of the steel hollow arm support technology and the fiber composite arm support technology are fully utilized, and the optimal combination of the light weight, the performance and the cost of the arm support assembly is realized.

Description

Cantilever crane assembly and concrete machinery

Technical Field

The utility model belongs to the technical field of engineering machinery, and particularly relates to an arm support assembly and a concrete machine.

Background

The arm support is an important bearing structure piece in concrete machinery (such as a concrete pump truck and the like), all the sections of arms are connected through rotary joints and corresponding mechanical mechanisms, and the performance of the arm support determines the whole vehicle working capacity, the working safety and the operability to a great extent.

The existing arm support can realize the aim of hollowed-out design on the arm support to reduce the weight of the arm support, but the design requirement on the light weight of the arm support can not be met, so that the arm support assembly is light in weight and has a lifting space.

Disclosure of Invention

The utility model mainly aims to provide a cantilever crane assembly and a concrete machine, so that the respective advantages of a steel hollow cantilever crane technology and a fiber composite cantilever crane technology are fully utilized, and the cantilever crane assembly further realizes the technical problems of light weight, cost, performance and reliability in a better matching mode.

In order to achieve the above purpose, the utility model provides the arm support assembly, which comprises a metal hollow arm support and a fiber composite arm support, wherein the metal hollow arm support and the fiber composite arm support are sequentially hinged, the metal hollow arm support is arranged close to one end of a turntable, the fiber composite arm support is arranged far away from one end of the turntable, and the metal hollow arm support and the fiber composite arm support are both box-shaped arm supports.

In an embodiment of the utility model, the metal hollow arm support comprises at least one metal hollow arm section, and the fiber composite arm support comprises at least one fiber composite arm section.

In the embodiment of the utility model, a solid web arm support is further hinged between the metal hollow arm support and the fiber composite arm support, and the solid web arm support comprises at least one solid web arm section.

In the embodiment of the utility model, the metal hollowed-out arm section comprises first webs arranged at two sides at intervals, a first top plate connected to the top ends of the two first webs, and a first bottom plate connected to the bottom ends of the two first webs, wherein a plurality of lightening holes are arranged on the first webs at intervals.

In the embodiment of the utility model, the fiber composite arm section comprises an arm section body, a flitch arranged on the arm section body and a connecting sleeve arranged in the arm section body, wherein the arm section body is provided with a hinge hole through which a pin shaft penetrates, a shaft sleeve is arranged in the hinge hole, and the shaft sleeve is fixed on the arm section body through the flitch and the connecting sleeve.

In an embodiment of the present utility model, two axial ends of the connecting sleeve are welded to bottom end surfaces of the shaft sleeve on two sides, the shaft sleeve includes a shaft sleeve body and an annular flange, the annular flange is formed at an end of the shaft sleeve body, and two sides of the annular flange are respectively abutted to inner side surfaces of the connecting sleeve and the arm segment body.

In an embodiment of the utility model, the connecting sleeve and the sleeve are coaxially arranged, the inner diameter of the connecting sleeve is larger than the inner diameter of the sleeve body, and the outer diameter of the connecting sleeve is smaller than the outer diameter of the annular flange.

In the embodiment of the utility model, the end parts of the arm segment bodies are connected with metal sealing plates.

In the embodiment of the utility model, the fiber composite arm support is a fiber-reinforced resin-based composite material workpiece, the fiber-reinforced resin-based composite material workpiece comprises fibers and resin, and the fibers are any one of carbon fibers, glass fibers or aramid fibers.

In an embodiment of the present utility model, the resin is any one of epoxy resin, unsaturated resin, or phenolic resin.

In an embodiment of the utility model, a concrete machine is also provided, comprising the boom assembly as described above.

Through the technical scheme, the arm support assembly provided by the embodiment of the utility model has the following beneficial effects:

according to the lightweight design mode of the metal hollow arm support-fiber composite arm support combination, the metal hollow arm support is arranged at one end close to the rotary table, and the fiber composite arm support is arranged at one end far away from the rotary table, wherein the metal hollow arm support and the fiber composite arm support are both box-shaped arm supports. According to the fiber composite cantilever crane, the cantilever crane is arranged to be in a combined form of the metal hollowed-out arm close to the turntable and the fiber composite cantilever crane far away from the turntable, and the weight of the fiber composite cantilever crane is light, so that the load of the metal hollowed-out cantilever crane close to the turntable side is reduced, the hollowed-out area of the metal hollowed-out cantilever crane can be enlarged, the dead weight of the metal hollowed-out cantilever crane is reduced, the total weight of the cantilever crane is greatly reduced, and the optimized combination of the light weight, the performance and the cost of the cantilever crane assembly is realized on the premise that the reliability of the cantilever crane is not influenced.

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

Drawings

The accompanying drawings are included to provide an understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

FIG. 1 is a schematic diagram of a connection structure of a metal hollow arm support and a solid arm support according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a fiber composite boom according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a fiber composite arm segment according to an embodiment of the utility model;

FIG. 4 is a schematic view, partially in section, of the portion A-A of FIG. 3;

FIG. 5 is a schematic view of a bushing according to an embodiment of the utility model;

fig. 6 is a schematic structural view of a metal hollowed-out arm joint according to an embodiment of the utility model.

Description of the reference numerals

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present utility model.

As shown in fig. 1 and fig. 2, in the embodiment of the present utility model, a boom assembly is provided, where the boom assembly design of the present application is applicable to engineering equipment with boom structures, such as pump trucks, and the like, and may also be applied to straight arms, curved arms or composite-shaped booms, and other mechanical structures with boom structures. Further, the arm support assembly comprises a metal hollow arm support and a fiber composite arm support which are sequentially hinged, wherein the metal hollow arm support is arranged at one end, close to the turntable, of the metal hollow arm support, the fiber composite arm support is arranged at one end, far away from the turntable, of the fiber composite arm support, and the metal hollow arm support and the fiber composite arm support are box-shaped arm supports; in addition, it can be understood that the metal hollowed-out arm support refers to a structural form that weight reducing holes are hollowed out on the arm support.

The metal hollow arm support comprises at least one metal hollow arm section 1, the fiber composite arm support comprises at least one fiber composite arm section 4, and the fiber composite arm section 4 is a fiber strong resin matrix composite product. Of course, when the number of the metal hollow arm sections 1 in the metal hollow arm frame is two or more, the metal hollow arm sections 1 are sequentially hinged end to end; when the number of the fiber composite arm sections 4 in the fiber composite arm support is two or more, the plurality of fiber composite arm sections 4 are sequentially hinged from head to tail.

It should be noted that, the fiber composite arm support refers to an arm support whose main component is made of a fiber-reinforced resin matrix composite material, for example, in this embodiment, the web and the cover plate that form the arm support box are made of a fiber-reinforced resin matrix composite material, and the shaft sleeve 44, the connecting sleeve 43, and the like at each hinge point are made of a metal material.

The utility model provides a lightweight design method for a metal hollowed-out arm support-fiber composite arm support combination. Compared with fiber composite materials, the metal hollow arm section 1, especially steel, has large elastic modulus and low strength, and the deformation of the metal hollow arm frame is smaller under the condition of the same section and load; compared with metal, the fiber composite material has high strength and small elastic modulus, and under the same section, the arm support can bear larger load. The weight of the metal hollowed arm support is reduced by about 20 percent relative to that of the Jin Shushi abdominal arm support, and the cost is lower; the weight of the fiber composite arm section 4 is reduced by 15 percent relative to the metal hollow arm frame, the light weight effect is outstanding, the mechanical property is good, the reliability is high, and the manufacturing method is simple. According to the combined arm support of the fiber composite arm support, which is close to the turntable, and is far away from the turntable, the combined arm support is used for replacing a metal solid web arm support, and the fiber composite arm support is light in weight, so that the load of the metal hollow arm support close to the turntable side is reduced, the hollow area of the metal hollow arm support can be increased, the dead weight of the metal hollow arm support is reduced, the total weight of the arm support is greatly reduced, and the optimal combination of the light weight, the performance and the cost of the arm support assembly is realized.

And, because the load is less near the one end of cloth point and is greater far away from the one end of cloth point, so based on the material characteristics of metal and fibre composite, the fibre composite cantilever crane that constitutes by fibre composite arm festival 4 is set up near the one side of cloth point.

In one embodiment, a solid arm support is further hinged between the metal hollow arm support and the fiber composite arm support, and the solid arm support may include at least one solid arm section 3, that is, the middle solid arm section 3 plays a role of connecting the metal hollow arm section 1 and the fiber composite arm section 4 at two ends.

As shown in fig. 1 and 2, taking the whole arm frame assembly as six-section arm for illustration, each arm section in the arm frame assembly is sequentially composed of two sections of metal hollowed-out arm sections 1, one section of solid web arm sections 3 and three sections of fiber composite arm sections 4. The arm support body of four arms, five arms and six arms adopts fiber composite materials, and the functions are as follows: the weight of the four arms, the five arms and the six arms can be reduced, and the load of the steel arm support of the first arm, the second arm and the three arms can be reduced, so that the weight of the arm support is reduced. And the first arm and the second arm carry out a hollowed-out arm support technology, so that the total weight of the arm support is further reduced, and the extremely light design of the arm support is realized.

The fiber-reinforced resin-based composite material part comprises fibers and resin, wherein the fibers are any one of carbon fibers, glass fibers or aramid fibers, and carbon fibers are preferred. The resin is any one of epoxy resin, unsaturated resin, and phenolic resin, and preferably epoxy resin.

The above-described arrangement of the present application mainly considers the mechanical properties of carbon fiber materials and steel. Specifically, the carbon fiber material has low elastic modulus, and the carbon fiber cantilever crane is about twice larger than the deformation of the steel cantilever crane under the same section size, so that the deformation requirement of the cantilever crane is met, the fiber composite cantilever crane is arranged on one side close to the distribution point, the size of the space occupied by the fiber composite cantilever crane is reduced, and more arrangement space is provided for the metal hollowed-out cantilever crane and the solid cantilever crane with larger subsequent load. The metal hollow arm support and the solid arm support are steel materials, and the steel materials have larger elastic modulus than carbon fibers, so that the metal hollow arm support and the solid arm support can be of a steel structure to obtain smaller section sizes under the condition of meeting the strength of the arm support, and the space arrangement of each arm in an arm support system is facilitated. As shown in fig. 1 and 2, the position of the solid web arm is not particularly limited as long as the solid web arm is positioned between the metal hollowed-out arm section and the fiber composite arm section; in the actual processing process, if the web plate of the solid-web arm section is hollowed out, the strength of the arm frame is reduced, and the manufacturing manufacturability of the arm frame is poor, so that the arm section is set to be in a solid-web arm frame structure according to the use condition and the stress condition of the solid-web arm section.

Of course, other combinations or expansions can be carried out according to stress conditions, the number of the section arms and layout requirements in practical application, and any combination of the solid cantilever crane, the metal hollow cantilever crane and the fiber composite cantilever crane or any combination of the metal hollow cantilever crane and the fiber composite cantilever crane can be obtained, so that more cantilever crane assemblies with excellent light weight performance can be obtained.

As shown in fig. 6, the metal hollowed out arm section 1 includes first webs 11 arranged at two sides at intervals, and a first top plate 12 and a first bottom plate 13 connected to the top ends and the bottom ends of the two first webs 11, and a plurality of lightening holes 14 are arranged on the first webs 11 at intervals. The hollow design is carried out on the left web plate and the right web plate of the arm support according to the stress condition of the arm support, and different hollow forms can be formed by combining different lightening holes 14, so that the light weight effect is achieved. The shape of the lightening hole 14 may be triangular, circular or other special-shaped structure, which is not limited herein. The number of the lightening holes 14 is at least two, and the lightening holes may be arranged at intervals along the length direction of the first web 11.

In the embodiment of the utility model, the fiber composite arm section 4 comprises an arm section body 41, a flitch plate 42 arranged on the arm section body 41 and a connecting sleeve 43 positioned in the arm section body 41, wherein the arm section body 41 is provided with a hinge hole for a pin shaft to penetrate, and a shaft sleeve 44 is arranged in the hinge hole. The arm section body 41 of the fiber composite arm section 4 is made of fiber composite material, and the flitch 42, the connecting sleeve 43 and the shaft sleeve 44 on the arm section body 41 are all made of metal material. Further, the arm segment body 41 includes two second webs arranged at intervals, and hinge holes are formed at corresponding positions of each second web for penetrating the pin shaft, and when the hinge structure is connected, the shaft sleeve 44 is fixed on the arm segment body 41 through the flitch 42 and the connecting sleeve 43, so as to improve the local strength of the whole hinge.

In the embodiment of the utility model, the two axial ends of the connecting sleeve 43 are welded with the bottom end surfaces of the shaft sleeves 44 on the two sides, the shaft sleeves 44 comprise a shaft sleeve body 45 and annular flanges 46, the annular flanges 46 are formed at the end parts of the shaft sleeve body 45, the bottom end surfaces of the annular flanges 46 are abutted with the connecting sleeve 43, and the top end surfaces are abutted with the inner side surfaces of the arm segment body 41. The shaft sleeve 44 is axially fixed on the arm segment body 41 through parts such as the flitch 42, the connecting sleeve 43 and the like, the shaft sleeve 44 can be sleeved on the arm segment body 41 in a molded surface connection mode, the shaft sleeve 44 is prevented from rotating, and the molded surface can be in an elliptic shape, a square shape and the like.

In the embodiment of the present utility model, the connection sleeve 43 and the sleeve 44 are coaxially arranged, the inner diameter of the connection sleeve 43 is larger than the inner diameter of the sleeve body 45, and the outer diameter of the connection sleeve 43 is smaller than the outer diameter of the annular flange 46. In this embodiment, the two ends of the connecting sleeve 43 are welded and fixed on the shaft sleeve bodies 45 on the two sides respectively, so that the local strength of the arm frame hinge point can be improved.

In the embodiment of the utility model, the ends of the arm segment body 41 are connected with metal sealing plates 47 to increase the rigidity and strength of the arm segment body 41 of the fiber composite arm segment 4.

In an embodiment of the utility model, a concrete machine is also provided, comprising the boom assembly as described above. The concrete machine includes all embodiments of the boom assembly described above, and therefore has all the beneficial effects of the boom assembly, which are not described in detail herein.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," 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 present utility model. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. The cantilever crane assembly is characterized by comprising a metal hollowed-out cantilever crane and a fiber composite cantilever crane which are sequentially hinged, wherein the metal hollowed-out cantilever crane is arranged at one end close to a turntable, the fiber composite cantilever crane is arranged at one end far away from the turntable, and the metal hollowed-out cantilever crane and the fiber composite cantilever crane are both box-shaped cantilever cranes.

2. Boom assembly according to claim 1, characterized in that the metal hollowed boom comprises at least one metal hollowed boom section (1) and the fiber composite boom comprises at least one fiber composite boom section (4).

3. The boom assembly according to claim 1, characterized in that a solid web boom is further hinged between the metal hollowed boom and the fiber composite boom, the solid web boom comprising at least one solid web boom section (3).

4. Arm support assembly according to claim 2, characterized in that the metal hollowed-out arm section (1) comprises first webs (11) which are arranged at two sides at intervals, a first top plate (12) connected to the top ends of the two first webs (11) and a first bottom plate (13) connected to the bottom ends of the two first webs (11), and a plurality of lightening holes (14) are arranged on the first webs (11) at intervals.

5. Arm support assembly according to claim 2, characterized in that the fibre composite arm segment (4) comprises an arm segment body (41), a flitch (42) arranged on the arm segment body (41) and a connecting sleeve (43) arranged in the arm segment body (41), the arm segment body (41) is provided with a hinge hole for a pin shaft to penetrate, a shaft sleeve (44) is arranged in the hinge hole, and the shaft sleeve (44) is fixed on the arm segment body (41) through the flitch (42) and the connecting sleeve (43).

6. The boom assembly according to claim 5, wherein the axial ends of the connecting sleeve (43) are welded with the bottom end surfaces of the shaft sleeves (44) on two sides, the shaft sleeves (44) comprise shaft sleeve bodies (45) and annular flanges (46), the annular flanges (46) are formed at the end parts of the shaft sleeve bodies (45), and two sides of the annular flanges (46) are respectively abutted with the end surfaces of the connecting sleeve (43) and the inner side surfaces of the arm joint bodies (41).

7. Boom assembly according to claim 6, characterized in that the connection sleeve (43) and the sleeve (44) are coaxially arranged, the inner diameter of the connection sleeve (43) being larger than the inner diameter of the sleeve body (45), and the outer diameter of the connection sleeve (43) being smaller than the outer diameter of the annular flange (46).

8. Arm support assembly according to claim 6, characterized in that the ends of the arm segment body (41) are each connected with a metal closing plate (47).

9. The boom assembly of any of claims 1-8, wherein the fiber composite boom is a fiber-reinforced resin-based composite part.

10. A concrete machine comprising a boom assembly as claimed in any one of claims 1 to 9.