CN217128995U

CN217128995U - Arm support knuckle arm, arm support and engineering machinery

Info

Publication number: CN217128995U
Application number: CN202122978896.9U
Authority: CN
Inventors: 刘基浩
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2022-08-05
Anticipated expiration: 2031-11-30

Abstract

The utility model provides an arm frame knuckle arm, cantilever crane and engineering machine tool belongs to engineering machine tool cantilever crane technical field, include: the joint arm comprises a joint arm main body, wherein the joint arm main body is of a long pipe type structure, the joint arm main body is formed by bending a plate body, and two sides of the plate body are connected with each other through welding. The utility model provides a pair of cantilever crane festival arm will save the arm main part and buckle the shaping through a plate body, two sides of festival arm main part weld mutually, consequently, only a welding seam of festival arm main part has reduced welding deformation, has reduced the welding cost, has improved the whole mechanics performance of festival arm main part.

Description

Arm support knuckle arm, arm support and engineering machinery

Technical Field

The utility model relates to an engineering machine tool cantilever crane technical field, concretely relates to cantilever crane festival arm, cantilever crane and engineering machine tool.

Background

The concrete pump truck is an engineering machine having a function of pumping concrete, and is used for delivering the concrete to a designated location. The arm support of the concrete pump truck comprises a plurality of foldable section arms, and during construction, each section arm is unfolded and conveys concrete to a certain height and distance along the arm support by utilizing a conveying pipe. Therefore, whether the structure of the arm support is reasonable or not directly influences the working performance and the operation stability of the whole vehicle. The stress condition of the arm support is very complex and needs to bear the action of alternating load, so that the section form of the arm support becomes an important index for the stress condition of the arm support. The conventional arm support knuckle arm is generally a square tube structure formed by welding steel plates, and has poor bearing capacity, so that the bearing capacity of the arm support knuckle arm needs to be improved by increasing the thickness of the arm support knuckle arm, the arm support knuckle arm has high weight, the requirement on the bearing capacity of a pump truck chassis is correspondingly increased, and the comprehensive cost of the pump truck is increased.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the poor, the big defect of weight of bearing capacity of the cantilever crane knuckle arm among the prior art.

In order to solve the technical problem, the utility model provides an cantilever crane knuckle arm, include:

the joint arm comprises a joint arm main body, wherein the joint arm main body is of a long pipe type structure, the joint arm main body is formed by bending a plate body, and two sides of the plate body are connected with each other through welding.

The section of the knuckle arm main body perpendicular to the extending direction of the knuckle arm main body is of a polygonal structure, an elliptical structure or a circular structure.

The section of the joint arm main body in the direction perpendicular to the extending direction of the joint arm main body is of a polygonal structure with at least five sides, and two sides of the plate body are welded at the edges of the joint arm main body.

The polygonal structure is hexagonal, octagonal or decagonal.

The knuckle arm main body is an aluminum alloy part.

The tip of festival arm main part is provided with coupling assembling, coupling assembling is suitable for connecting adjacent festival arm main part.

The coupling assembling include with the connecting plate that the festival arm main part was connected and is set up, the relative interval of connecting plate is provided with a pair ofly, and is a pair of all seted up the through-hole on the connecting plate, be suitable for inserting in the through-hole and establish the round pin axle.

The utility model also provides an arm support, including foretell arm support festival arm, the arm support festival arm is provided with a plurality ofly, and is a plurality of the both ends of arm support festival arm are articulated in proper order and are set up.

The utility model also provides an engineering machine tool, including foretell cantilever crane.

The engineering machinery is a concrete pump truck.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a pair of cantilever crane festival arm will save the arm main part and buckle the shaping through a plate body, two sides of festival arm main part weld mutually, consequently, only a welding seam of festival arm main part has reduced welding deformation, has reduced the welding cost, has improved the whole mechanics performance of festival arm main part.

2. The utility model provides a pair of cantilever crane festival arm, set up festival arm main part into polygonized structure in perpendicular to festival arm main part ascending cross-section, perhaps oval structure, perhaps circular structure, and, polygonized structure's limit number is the pentagon at least, make the mechanical properties that festival arm main part can the full play material, and anti bucking ability reinforce, therefore, when having guaranteed cantilever crane festival arm stability, can increase the height-thickness ratio of festival arm main part, can so that the thickness of cantilever crane festival arm reduces, then the cantilever crane festival arm's weight is corresponding to be reduced, the bearing capacity on engineering machine chassis requires to reduce, corresponding engineering machine's comprehensive cost is lower.

3. The utility model provides a pair of cantilever crane festival arm sets up polygonal structure's limit number into hexagon, octagon or decagon, and polygonal structure shape is more symmetrical, and the atress is more balanced to, the manufacturing of the festival arm main part of being convenient for is made in the setting of the procedure of being convenient for and the production and the use of mold processing.

4. The utility model provides a pair of cantilever crane festival arm sets up the festival arm main part into aluminum alloy spare, and the aluminum alloy is light material, consequently, has reduced the whole weight of festival arm main part by a wide margin.

5. The utility model provides a pair of cantilever crane, including foretell cantilever crane festival arm, and cantilever crane festival arm is provided with a plurality ofly, and a plurality of cantilever crane festival arms are articulated in proper order to be set up, when not using, but a plurality of cantilever crane festival arms rotate relatively to fold condition, and when using, a plurality of cantilever crane festival arms expand the setting to the effect that the cantilever crane need bear alternating load when using, consequently, the utility model discloses a mechanical properties that the cantilever crane can the full play material, and anti bucking ability is strong, guarantees the stability of cantilever crane.

6. The utility model provides a pair of engineering machine, including foretell cantilever crane, this cantilever crane is when having guaranteed stability, and light in weight requires to reduce the bearing capacity on engineering machine chassis, and corresponding engineering machine's comprehensive cost is lower.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a partial structure of a boom arm provided in an embodiment of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

fig. 3 is an enlarged view at B in fig. 1.

Description of reference numerals:

10. a knuckle arm body; 20. a connecting assembly; 21. a connecting plate; 211. a through hole; 22. a reinforcing plate; 30. a delivery pipe bracket.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", 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 element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

The first specific embodiment of the arm support knuckle arm shown in fig. 1 to 3 includes: the knuckle arm comprises a knuckle arm main body 10, wherein the knuckle arm main body 10 is of a long pipe type structure, the knuckle arm main body 10 is formed by bending a plate body, and two side edges of the plate body are connected with each other through welding.

The knuckle arm main body 10 is formed by bending a plate body, and two side edges of the knuckle arm main body 10 are welded, so that the knuckle arm main body 10 only has one welding line, welding deformation is reduced, welding cost is reduced, and the overall mechanical performance of the knuckle arm main body 10 is improved.

As shown in fig. 1 to 3, the section of the arm body 10 perpendicular to the extending direction of the arm body 10 has a polygonal structure with at least five sides, or an elliptical structure, or a circular structure.

The section of the arm body 10 perpendicular to the extending direction of the arm body 10 is set to be a polygonal structure, an oval structure or a circular structure, and the number of the sides of the polygonal structure is at least five, so that the arm body 10 can fully exert the mechanical performance of materials, and the buckling resistance is strong, therefore, the stability of the arm frame arm can be ensured, the height-thickness ratio of the arm body 10 can be increased, namely the thickness of the arm frame arm can be reduced, the weight of the arm frame arm is correspondingly reduced, the requirement on the bearing capacity of an engineering machine chassis is reduced, and the comprehensive cost of the corresponding engineering machine is low.

The extending direction of the knuckle arm body 10 is the longitudinal direction of the knuckle arm body 10.

In order to facilitate the processing and manufacturing, the number of the sides of the polygonal cross section of the knuckle arm main body 10 is usually set to be even, preferably, the polygonal cross section can be hexagonal, octagonal or decagonal, the polygonal structure is more symmetrical in shape, the stress is more balanced, the setting of the processing program and the production and use of the processing die are facilitated, and the processing and manufacturing of the knuckle arm main body 10 are facilitated.

Of course, the section of the knuckle arm main body 10 may also be an ellipse or a circle, which is more convenient to machine and manufacture than a circle, and thus the elliptical section is more selected in the production process.

In the present embodiment, as shown in fig. 1 and 2, the joint arm main body 10 has a hexagonal structure in cross section.

In the present embodiment, as shown in fig. 2, the weld of the knuckle arm main body 10 is located at one edge of the knuckle arm main body 10, that is, two sides of the plate body bent to form the knuckle arm main body 10 are welded to the edge of the knuckle arm main body 10.

Of course, the weld of the knuckle arm body 10 may also be located on the face of the knuckle arm body 10.

In this embodiment, the arm main body 10 is made of a high-strength aluminum alloy, and the aluminum alloy is a light material, so that the overall weight of the arm main body 10 is greatly reduced.

As shown in fig. 1, the end portions of the knuckle arm bodies 10 are provided with joint assemblies 20, and the adjacent knuckle arm bodies 10 are connected to each other by the joint assemblies 20. Specifically, as shown in fig. 3, the connecting assembly 20 includes a pair of connecting plates 21 disposed at an interval, and the pair of connecting plates 21 are respectively connected to two opposite surfaces of the knuckle arm main body 10, and the connecting plates 21 are located on an inner side surface of the knuckle arm main body 10. As shown in fig. 3, two pairs of through holes 211 are formed in the pair of connecting plates 21, and a pin shaft is inserted into the through holes 211 to be rotatably connected to the adjacent knuckle arm main bodies 10.

In the present embodiment, a pair of connecting plates 21 are each connected to the knuckle arm body 10 by welding. The connecting plate 21 is an open plate welding form, and the generated welding deformation is small.

In the present embodiment, as shown in fig. 3, a reinforcing plate 22 is further provided on the connecting plate 21. Specifically, the reinforcing plate 22 is attached to the outer side surface of the connecting plate 21, and the reinforcing plate 22 covers the space between the pair of through holes 211 and the outer periphery of the pair of through holes 211 to reinforce the connection strength between the adjacent knuckle arm bodies 10.

In the present embodiment, the connecting plate 21 and the reinforcing plate 22 are connected by welding.

As shown in fig. 1, the arm body 10 is provided with a plurality of delivery pipe brackets 30, and the plurality of delivery pipe brackets 30 are provided at intervals along the longitudinal direction of the arm body 10. The delivery pipe is a device for delivering concrete from the hopper to a designated place, and is mounted on the arm frame knuckle arm through a delivery pipe support 30, and moves along with the arm frame knuckle arm. One end of the conveying pipe support 30 is fixedly welded with the knuckle arm main body 10, and the other end of the conveying pipe support is detachably connected with the conveying pipe, so that the conveying pipe is more convenient to mount and dismount. Specifically, the delivery tube support 30 is threaded onto the delivery tube or attached via a ferrule.

The specific implementation mode of the arm support is further provided, the arm support comprises the arm support section arms, the number of the arm support section arms is multiple, and two ends of the arm support section arms are sequentially hinged.

According to the arm support provided by the embodiment, when the arm support is not used, the arm support joint arms can rotate relatively to the folded state, when the arm support is used, the arm support joint arms are unfolded and arranged, and when the arm support is used, the arm support needs to bear the alternating load, so that the arm support can fully exert the mechanical property of materials, is strong in buckling resistance and ensures the stability of the arm support.

The specific embodiment of the engineering machinery is also provided, and the engineering machinery comprises the arm support. The arm frame provided by the embodiment has the advantages that the stability is guaranteed, meanwhile, the weight is light, the requirement on the bearing capacity of the engineering machinery chassis is reduced, and the comprehensive cost of the corresponding engineering machinery is low.

In this embodiment, the construction machine is a concrete pump truck.

Of course, the engineering machinery may also be other equipment provided with an arm support.

In summary, in the arm support knuckle arm provided by this embodiment, the knuckle arm main body is formed by bending a plate body, and two side edges of the knuckle arm main body are welded, so that the knuckle arm main body has only one welding seam, thereby reducing welding deformation, reducing welding cost, and improving the overall mechanical performance of the knuckle arm main body; and the section of the arm body in the direction perpendicular to the extension direction of the arm body is set to be a polygonal structure, an elliptical structure or a circular structure, and the number of the sides of the polygonal structure is at least five, so that the arm body can fully exert the mechanical property of the material, and the buckling resistance is strong, therefore, the stability of the arm frame arm can be ensured, the height-thickness ratio of the arm body can be increased, namely the thickness of the arm frame arm can be reduced, the weight of the arm frame arm is correspondingly reduced, the requirement on the bearing capacity of the engineering machinery chassis is reduced, and the comprehensive cost of the corresponding engineering machinery is lower.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. An arm support knuckle arm is characterized by comprising:

the joint arm comprises a joint arm body (10), the joint arm body (10) is of a long pipe type structure, the joint arm body (10) is formed by bending a plate body, two sides of the plate body are connected with each other through welding, the joint arm body (10) is perpendicular to the cross section in the extending direction of the joint arm body (10) and is of a polygonal structure or an elliptical structure or a circular structure which is at least five sides.

2. The boom arm segment of claim 1, characterized in that the cross section of the arm segment body (10) perpendicular to the extension direction of the arm segment body (10) is a polygonal structure with at least five sides, and two sides of the plate body are welded at the edges of the arm segment body (10).

3. The boom arm section according to claim 1 or 2, wherein the polygonal structure is hexagonal, or octagonal, or decagonal.

4. Arm support knuckle according to claim 1 or 2, characterized in that the knuckle body (10) is an aluminium alloy piece.

5. Arm support knuckle arm according to claim 1 or 2, characterized in that the ends of the knuckle arm bodies (10) are provided with a connecting assembly (20), said connecting assembly (20) being adapted to connect adjacent knuckle arm bodies (10).

6. The arm support knuckle arm of claim 5, wherein the connecting assembly (20) comprises a pair of connecting plates (21) connected with the knuckle arm main body (10), the connecting plates (21) are oppositely arranged at intervals, through holes (211) are formed in the pair of connecting plates (21), and a pin shaft is suitable to be inserted into the through holes (211).

7. An arm support is characterized by comprising a plurality of arm support sections according to any one of claims 1 to 6, wherein two ends of the plurality of arm support sections are sequentially hinged.

8. A working machine, characterized by comprising the boom of claim 7.

9. The working machine according to claim 8, characterized in that the working machine is a concrete pump truck.