CN113979335A - Engineering machinery arm support structure and engineering machinery - Google Patents
Engineering machinery arm support structure and engineering machinery Download PDFInfo
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- CN113979335A CN113979335A CN202111271547.1A CN202111271547A CN113979335A CN 113979335 A CN113979335 A CN 113979335A CN 202111271547 A CN202111271547 A CN 202111271547A CN 113979335 A CN113979335 A CN 113979335A
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- 238000010276 construction Methods 0.000 claims description 15
- 230000008093 supporting effect Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 5
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- 230000002452 interceptive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/68—Jibs foldable or otherwise adjustable in configuration
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Abstract
The invention relates to an engineering machinery arm support structure and engineering machinery, wherein the engineering machinery arm support structure comprises a main arm (1), an auxiliary arm (2), a first support (3), a first connecting piece (4), a second support (5) and a second connecting piece (6), the auxiliary arm (2) is rotatably connected with the main arm (1), the auxiliary arm (2) comprises an auxiliary arm body (21) and an arm head (22) connected to one end of the auxiliary arm body (21) far away from the main arm (1), the first support (3) is rotatably connected with the main arm (1) or the auxiliary arm (2), the first connecting piece (4) is connected between one end of the first support (3) far away from the auxiliary arm (2) and the arm head (22), the second support (5) is rotatably connected with the main arm (1) or the auxiliary arm (2), the second connecting piece (6) is connected between one end of the second support (5) far away from the auxiliary arm (2) and the arm head (22), the angle between the first bracket (3) and the second bracket (5) is adjustable.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to an engineering machinery arm support structure and engineering machinery.
Background
Engineering machinery is an important component of modern construction, and in recent years, with the continuous development of the degree of modernization, the performances of large amplitude and the like of all-terrain cranes are more and more favored by customers and markets.
In the related art, the lateral load resistance of the crane boom is poor, and if the width of the boom support is increased in order to improve the lateral load resistance, the problem that the support occupies a large space when the boom is retracted is faced.
It is noted that the information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information constitutes prior art already known to a person skilled in the art.
Disclosure of Invention
The embodiment of the invention provides an engineering machinery arm support structure and engineering machinery, which can effectively improve the overall performance of the arm support structure.
According to an aspect of the present invention, there is provided an engineering machinery boom structure, including:
a main arm;
the auxiliary arm is rotatably connected with the main arm and comprises an auxiliary arm body and an arm head connected to one end, far away from the main arm, of the auxiliary arm body;
a first bracket rotatably connected to the main arm or the sub-arm;
the first connecting piece is connected between one end of the first support far away from the auxiliary arm and the arm head;
a second bracket rotatably coupled to the main arm or the sub-arm; and
the second connecting piece is connected between one end of the second bracket, which is far away from the auxiliary arm, and the arm head;
wherein, the angle size between first support and the second support is adjustable.
In some embodiments, the first support comprises a first support rod and a second support rod, the first support rod and the second support rod are respectively connected between the main arm and the first connecting piece or between the auxiliary arm and the first connecting piece, and the angle between the first support rod and the second support rod is adjustable; and/or the presence of a gas in the gas,
the second support comprises a third supporting rod and a fourth supporting rod, the third supporting rod and the fourth supporting rod are respectively connected between the main arm and the second connecting piece or between the auxiliary arm and the second connecting piece, and the angle between the third supporting rod and the fourth supporting rod is adjustable.
In some embodiments, the first support rod and the second support rod are connected to the same connecting point of the main arm or the auxiliary arm, so that the second support rod rotates along with the rotation of the first support rod; and/or the third support rod and the fourth support rod are connected to the same connecting point of the main arm or the auxiliary arm, so that the fourth support rod rotates along with the rotation of the third support rod.
In some embodiments, the first and second brackets are connected to different connection points of the primary arm or to different connection points of the secondary arm, respectively.
In some embodiments, the engineering machinery arm support structure further includes a support frame, the support frame is connected to the main arm or the auxiliary arm, and the first support and the second support are respectively connected to the support frame.
In some embodiments, the secondary arm includes a first wall portion fixedly coupled to the primary arm and a second wall portion rotatably coupled to an end of the first wall portion distal from the primary arm.
In some embodiments, the first and second brackets are each attached to the main arm or to the first wall portion; alternatively, the first bracket is connected to the first wall portion and the second bracket is connected to the main arm.
In some embodiments, the engineering machinery arm support structure further comprises a driving assembly, the driving assembly is arranged between the first support and the second support, and the driving assembly drives the first support and the second support to relatively expand or retract.
In some embodiments, the drive assembly includes a first drive member disposed between the secondary arm and the first bracket or the primary arm and the first bracket, and a second drive member disposed between the first bracket and the second bracket.
In some embodiments, the drive assembly includes a linkage assembly disposed between the first bracket and the second bracket and a third drive disposed between the linkage assembly and the secondary arm or the primary arm.
In some embodiments, the main arm includes a main arm body and a tower cap connected between the main arm body and the sub arm, and the first bracket and the second bracket are respectively connected to the tower cap.
According to another aspect of the invention, a construction machine is provided, which includes the above construction machine arm support structure.
Based on the technical scheme, the cantilever crane comprises the first support and the second support, so that the stability of the cantilever crane when bearing a lateral force is improved; moreover, the angle between the first support and the second support is adjustable, and the unfolding angle between the first support and the second support can be increased according to needs, so that the side load resistance of the arm support structure is improved, the load capacity of the arm support is increased, and various working condition requirements are met; the unfolding angle between the first support and the second support can be reduced according to requirements, so that the occupied space of the arm support structure when the arm support structure is folded is reduced; in addition, the auxiliary arm can rotate relative to the main arm, so that the size of an included angle between the auxiliary arm and the main arm can be adjusted as required, and the hoisting range of the arm support is expanded.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural diagram of some embodiments of a working machine according to the present invention.
Fig. 2 is a partial structural schematic diagram of some embodiments of the boom structure of the engineering machinery of the present invention.
Fig. 3 is a schematic structural diagram of a first bracket assembly in some embodiments of an engineering machinery boom structure of the present invention.
Fig. 4 is a schematic structural diagram of a first driving assembly in some embodiments of an engineering machinery boom structure of the present invention.
Fig. 5 is a schematic structural diagram of a first driving assembly in other embodiments of the boom structure of an engineering machine according to the present invention.
In the figure:
1. a main arm; 11. a main arm body; 12. a tower cap; 2. an auxiliary arm; 21. a sub-arm body; 22. an arm head; 3. a first bracket; 31. a first support bar; 32. a second support bar; 4. a first connecting member; 41. a first connection portion; 42. a second connecting portion; 5. a second bracket; 51. a third support bar; 52. a fourth support bar; 6. a second connecting member; 61. a third connecting portion; 62. a fourth connecting portion; 7. a third connecting member; 8. hoisting; 9. a support frame; 101. a first driving member; 102. a second driving member; 103. a third driving member; 104. a first link; 105. a second link.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the scope of the invention.
Referring to fig. 1 and 2, in some embodiments of the boom structure of the construction machinery provided by the present invention, the boom structure includes a main arm 1, an auxiliary arm 2, a first bracket 3, a first connecting member 4, a second bracket 5, and a second connecting member 6, the auxiliary arm 2 is rotatably connected to the main arm 1, the auxiliary arm 2 includes an auxiliary arm body 21 and an arm head 22 connected to an end of the auxiliary arm body 21 away from the main arm 1, the first bracket 3 is rotatably connected to the main arm 1 or the auxiliary arm 2, the first connecting member 4 is connected between an end of the first bracket 3 away from the auxiliary arm 2 and the arm head 22, the second bracket 5 is rotatably connected to the main arm 1 or the auxiliary arm 2, the second connecting member 6 is connected between an end of the second bracket 5 away from the auxiliary arm 2 and the arm head 22, and an angle between the first bracket 3 and the second bracket 5 is adjustable.
In the above embodiment, the boom structure includes the first bracket 3 and the second bracket 5, which is beneficial to improving the stability of the boom when bearing the lateral force; moreover, the angle between the first support 3 and the second support 5 is adjustable, and the unfolding angle between the first support 3 and the second support 5 can be increased according to needs, so that the side load resistance of the arm support structure is improved, the load capacity of the arm support is increased, and various working condition requirements are met; the unfolding angle between the first support 3 and the second support 5 can be reduced according to the requirement, so that the occupied space of the arm support structure is reduced when the arm support structure is folded; in addition, the auxiliary arm 2 can rotate relative to the main arm 1, so that the included angle between the auxiliary arm 2 and the main arm 1 can be adjusted as required, and the hoisting range of the arm support is expanded.
The first bracket 3 and the second bracket 5 can be both rotatably connected with the main arm 1, and the first bracket 3 and the second bracket 5 can also be both rotatably connected with the auxiliary arm 2; or the first bracket 3 is rotatably connected with the main arm 1, and the second bracket 5 is rotatably connected with the auxiliary arm 2; alternatively, the first bracket 3 is rotatably connected to the sub-arm 2, and the second bracket 5 is rotatably connected to the main arm 1.
In the embodiment of the present invention, the first connecting member 4 and the second connecting member 6 may be a steel wire rope or a pulling plate.
In some embodiments, the first bracket 3 includes a first support rod 31 and a second support rod 32, and the first support rod 31 and the second support rod 32 are connected between the main arm 1 and the first link 4 or between the sub arm 2 and the first link 4, respectively.
The first support 3 is of a double-rod structure, so that the side load resistance of the arm support can be further improved, and the overall performance of the arm support is improved.
In some embodiments, the second bracket 5 includes a third support bar 51 and a fourth support bar 52, and the third support bar 51 and the fourth support bar 52 are connected between the main arm 1 and the second connecting member 6 or between the sub arm 2 and the second connecting member 6, respectively.
The second support 5 is of a double-rod structure, so that the side load resistance of the arm support can be further improved, and the overall performance of the arm support is improved.
In some embodiments, the angle between the first support bar 31 and the second support bar 32 is adjustable. By increasing the angle between the first support bar 31 and the second support bar 32, the expansion area of the first bracket 3 can be increased, and the side load resistance of the first bracket 3 and the side load resistance of the entire arm support can be increased.
In some embodiments, the angle between the third support bar 51 and the fourth support bar 52 is adjustable. By increasing the angle between the third support bar 51 and the fourth support bar 52, the deployment area of the second bracket 5 can be increased, and thus the side load resistance of the second bracket 5 and the side load resistance of the entire arm support can be increased.
In some embodiments, the first support rod 31 and the second support rod 32 are connected to the same connecting point of the main arm 1 or the sub-arm 2, so that the second support rod 32 rotates with the rotation of the first support rod 31.
By arranging the second support rod 32 to rotate along with the rotation of the first support rod 31, the first support rod 31 can be driven to rotate relative to the second support 5 by driving the second support rod 32, so that the unfolding angle between the first support 3 and the second support 5 is adjusted, the side load resistance of the arm support is changed, the arm support is convenient to fold and retract, and the occupied space is reduced.
In some embodiments, the third support rod 51 and the fourth support rod 52 are connected to the same connection point of the main arm 1 or the sub-arm 2, so that the fourth support rod 52 rotates with the rotation of the third support rod 51.
The fourth support rod 52 is arranged to rotate along with the rotation of the third support rod 51, and the third support rod 51 can be driven to rotate relative to the first support 3 by driving the fourth support rod 52, so that the unfolding angle between the first support 3 and the second support 5 is adjusted, the side load resistance of the arm support is changed, the arm support is convenient to fold and retract, and the occupied space is reduced.
In some embodiments, the first bracket 3 and the second bracket 5 are connected to the main arm 1 at different connection points, respectively, or to the sub-arm 2 at different connection points, respectively. The arrangement is favorable for improving the connection stability of the first support 3 and the second support 5 and increasing the bearing area formed by the first support 3 and the second support 5, thereby improving the bearing performance of the arm support.
As shown in fig. 3 to 5, in some embodiments, the boom structure of the construction machine further includes a support frame 9, the support frame 9 is connected to the main arm 1 or the sub-arm 2, and the first support 3 and the second support 5 are respectively connected to the support frame 9.
Through setting up support frame 9, can make first support 3 and second support 5 rotate for main arm 1 or auxiliary arm 2 at the hookup location with support frame 9, rather than rotating at the hookup location department that is located main arm 1 or auxiliary arm 2, changed the hinge point position of first support 3 and second support 5, be favorable to improving the convenience that first support 3 and second support 5 expand or withdraw, also be convenient for set up the pivoted drive assembly of drive first support 3 and second support 5.
As shown in fig. 3 to 5, the first bracket 3 and the second bracket 5 are connected to different connection points of the support bracket 9, respectively. Further, the first bracket 3 and the second bracket 5 are connected to one ends of the support frames 9, which are away from the main arm 1 or the sub-arm 2, respectively.
As shown in fig. 3, in some embodiments, the support frame 9 and the secondary arm 2 are connected to the primary arm 1 at different connection points, respectively. This avoids the amplitude of the secondary jib 2 interfering with the first support 3 or the second support 5.
In some embodiments, the secondary arm 2 pivots about its hinge point to the primary arm 1.
In other embodiments, the secondary arm 2 comprises a first wall portion fixedly connected to the primary arm 1 and a second wall portion rotatably connected to an end of the first wall portion remote from the primary arm 1. The arrangement can adjust the rotating hinge point of the auxiliary boom 2 from the hinge point position connected with the main boom 1 to the hinge point position where the second wall part is connected with the first wall part, can shorten the amplitude-variable length of the auxiliary boom 2, reduce the amplitude-variable range of the auxiliary boom 2 and avoid the interference of the auxiliary boom 2 with other components; meanwhile, after the amplitude variation length is reduced, the amplitude variation difficulty is also favorably reduced.
The length of the first wall portion may be 10% to 90% of the total length of the secondary arm 2.
In some embodiments, the first bracket 3 and the second bracket 5 are respectively connected to the main arm 1 or respectively to the first wall portion; alternatively, the first bracket 3 is connected to the first wall portion, and the second bracket 5 is connected to the main arm 1; alternatively, the second bracket 5 is connected to the first wall portion, and the first bracket 3 is connected to the main arm 1.
The first support 3 and the second support 5 can be connected to the main arm 1 close to the secondary arm 2, or to a first wall of the secondary arm 2 instead of the second wall, avoiding the amplitude of the second wall interfering with the first support 3 and the second support 5.
In some embodiments, the engineering machinery boom structure further includes a driving assembly, the driving assembly is disposed between the first support 3 and the second support 5, and the driving assembly drives the first support 3 and the second support 5 to relatively extend or retract. Through setting up drive assembly, can realize the automation of first support 3 and second support 5 and expand or withdraw, improve the convenience that the cantilever crane was closed automatically. And is also favorable for improving the operation efficiency.
In some embodiments, the driving assembly comprises a first driving member 101 and a second driving member 102, the first driving member 101 being disposed between the secondary arm 2 and the first bracket 3 or between the primary arm 1 and the first bracket 3, the second driving member 102 being disposed between the first bracket 3 and the second bracket 5.
The first driving member 101 may also be disposed between the sub arm 2 and the second bracket 5 or between the main arm 1 and the second bracket 5.
As shown in fig. 4, the first driving member 101 can drive the first frame 3 to rotate relative to the supporting frame 9, and the second driving member 102 can drive the second frame 5 to rotate relative to the supporting frame 9. The first bracket 3 and the second bracket 5 can be driven to relatively unfold through the second driving piece 102, so that the included angle between the straight lines of the first bracket 3 and the second bracket 5 is increased, and the side load resistance is improved; or the first support 3 and the second support 5 are driven to relatively retract, so that the size of an included angle between straight lines of the first support 3 and the second support 5 is reduced, the size of the arm support when retracted is reduced, and transition and transportation are facilitated.
The first driving member 101 and the second driving member 102 may be driven by an oil cylinder, an air cylinder, or an electric push rod.
By arranging the second driving member 102 between the first bracket 3 and the second bracket 5, the first bracket 3 and the second bracket 5 can be directly driven to be unfolded or retracted relative to each other, so that the included angle between the first bracket 3 and the second bracket 5 is changed, and the driving efficiency is high. On the basis of the second driving element 102, the first driving element 101 arranged between the main arm 1 or the sub-arm 2 and the first support 3 is added, so that a supporting effect can be formed on the first support 3, the second support 5 and the second driving element 102, and the stability and reliability of the first support 3, the second support 5 and the second driving element 102 are improved.
In some embodiments, the drive assembly comprises a linkage assembly disposed between the first bracket 3 and the second bracket 5, and a third drive member 103 disposed between the linkage assembly and the secondary arm 2 or between the linkage assembly and the primary arm 1.
As shown in fig. 5, the link assembly includes a first link 104 and a second link 105, the first link 104 is connected to the second bracket 5, the second link 105 is connected to the first bracket 3, and the third driving member 103 is connected to a connection portion of the first link 104 and the second link 105. The first link 104 and the second link 105 can be driven to swing by the third driving member 103, so as to push the first bracket 3 and the second bracket 5 to rotate relative to the supporting frame 9.
By using the link assembly, the number of driving members can be saved, thereby reducing driving cost.
The specific structure of the connecting rod assembly is not limited to the embodiment shown in fig. 5, and other possible structures may be adopted, and will not be described in detail here.
In some embodiments, the two links shown in FIG. 5 may be replaced with two meshing scallops.
The third driving member 103 can be a driving element such as an oil cylinder, an air cylinder or an electric push rod.
In some embodiments, the main arm 1 includes a main arm body 11 and a tower cap 12, the tower cap 12 is connected between the main arm body 11 and the sub arm 2, and the first bracket 3 and the second bracket 5 are respectively connected to the tower cap 12. By providing the tower cap 12, space and support can be provided for connecting the first bracket 3, the second bracket 5 and the secondary arm 2, optimizing the structural arrangement.
The construction machinery arm support structure and the construction machinery of some embodiments of the invention are described below with reference to the accompanying drawings 1 to 5:
as shown in fig. 1, the construction machine is a crane, and the crane includes a main boom 1, an auxiliary boom 2, a first support 3, a first connecting member 4, a second support 5, a second connecting member 6, a third connecting member 7, and a winch 8.
The main arm 1 includes a main arm body 11 and a tower cap 12, and the sub arm 2 is rotatably connected to an end of the tower cap 12. The first bracket 3 and the second bracket 5 are rotatably connected to the tower cap 12, respectively. The first connecting member 4 is connected between the sub-arm 2 and the first bracket 3, and the second connecting member 6 is connected between the sub-arm 2 and the second bracket 5. A third connecting piece 7 is arranged between the second bracket 5 and the winch 8.
As shown in fig. 2 and 3, the auxiliary arm 2 includes an auxiliary arm body 21 and an arm head 22, the auxiliary arm body 21 is connected with the tower cap 12, the tower cap 12 is provided with a support frame 9, and the first support 3 and the second support 5 are respectively hinged at different connection points of the support frame 9.
The first bracket 3 includes a first support bar 31 and a second support bar 32, and the second bracket 5 includes a third support bar 51 and a fourth support bar 52. The first support bar 31 and the second support bar 32 are hinged at the same connecting point of the support frame 9, and the third support bar 51 and the fourth support bar 52 are hinged at the same connecting point of the support frame 9.
The first link 4 includes a first connecting portion 41 and a second connecting portion 42, the first connecting portion 41 being connected between the arm head 22 and the first support bar 31, and the second connecting portion 42 being connected between the first support bar 31 and the second support bar 32. The second link 6 includes a third link portion 61 and a fourth link portion 62, the third link portion 61 being connected between the arm head 22 and the third support bar 51, and the fourth link portion 62 being connected between the first support bar 31 and the fourth support bar 52.
As shown in fig. 3, the sub-arm 2 and the support bracket 9 are connected to different connection points of the tower cap 12, respectively.
As shown in fig. 4, a first driving member 101 is disposed between the supporting frame 9 and the second bracket 5, a second driving member 102 is disposed between the first bracket 3 and the second bracket 5, and the first driving member 101 and the second driving member 102 are respectively connected to different connecting points of the second bracket 5.
As shown in fig. 5, a first connecting rod 104 and a second connecting rod 105 are arranged between the first bracket 3 and the second bracket 5, and are connected with each other, one end of the third driving member 103 is connected with the supporting frame 9, and the other end is connected with a connecting point between the first bracket 3 and the second bracket 5.
Through the description of the engineering mechanical arm support structure and multiple embodiments of the engineering machinery, the unfolding angles of the two supports in the engineering mechanical arm support structure and the engineering machinery embodiments are adjustable, and the two supports can bear large side load; the brackets can be retracted relative to each other, the load in the hoisting direction is increased, and the optimization of multi-working-condition load is met; the problem that the upper part of the support is wider than the head pull plate so that the pull plate cannot be folded automatically can be solved, the pull plate can be folded conveniently, and storage and transportation convenience is improved.
Based on the engineering machinery arm support structure, the invention further provides engineering machinery, and the engineering machinery comprises the engineering machinery arm support structure.
The engineering machinery arm support structure provided by the invention can be applied to engineering machinery such as all-terrain cranes, crawler cranes, tower cranes and the like.
The positive technical effects of the arm support structure of the engineering machinery in the above embodiments are also applicable to engineering machinery, and are not described herein again.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made without departing from the principles of the invention, and these modifications and equivalents are intended to be included within the scope of the claims.
Claims (12)
1. An engineering machinery cantilever crane structure, characterized by, includes:
a main arm (1);
the auxiliary arm (2) is rotatably connected with the main arm (1), and the auxiliary arm (2) comprises an auxiliary arm body (21) and an arm head (22) connected to one end, far away from the main arm (1), of the auxiliary arm body (21);
a first bracket (3) rotatably connected to the main arm (1) or the sub-arm (2);
the first connecting piece (4) is connected between one end, far away from the auxiliary arm (2), of the first support (3) and the arm head (22);
a second bracket (5) rotatably connected to the main arm (1) or the sub-arm (2); and
the second connecting piece (6) is connected between one end, far away from the auxiliary arm (2), of the second support (5) and the arm head (22);
wherein the angle between the first bracket (3) and the second bracket (5) is adjustable.
2. The boom structure of construction machinery according to claim 1, wherein the first bracket (3) comprises a first support rod (31) and a second support rod (32), the first support rod (31) and the second support rod (32) are respectively connected between the main arm (1) and the first connecting piece (4) or respectively connected between the auxiliary arm (2) and the first connecting piece (4), and the angle between the first support rod (31) and the second support rod (32) is adjustable; and/or the presence of a gas in the gas,
the second support (5) comprises a third support rod (51) and a fourth support rod (52), the third support rod (51) and the fourth support rod (52) are respectively connected between the main arm (1) and the second connecting piece (6) or between the auxiliary arm (2) and the second connecting piece (6), and the angle between the third support rod (51) and the fourth support rod (52) is adjustable.
3. The boom structure of construction machinery according to claim 2, wherein the first support rod (31) and the second support rod (32) are connected to the same connecting point of the main arm (1) or the sub-arm (2) such that the second support rod (32) rotates with the rotation of the first support rod (31); and/or the third support rod (51) and the fourth support rod (52) are connected to the same connecting point of the main arm (1) or the auxiliary arm (2), so that the fourth support rod (52) rotates along with the rotation of the third support rod (51).
4. The construction machinery boom structure according to claim 1, characterized in that the first bracket (3) and the second bracket (5) are connected to different connection points of the main arm (1) or to different connection points of the secondary arm (2), respectively.
5. The boom structure of engineering machinery according to claim 1, further comprising a support frame (9), wherein the support frame (9) is connected to the main arm (1) or the auxiliary arm (2), and the first bracket (3) and the second bracket (5) are respectively connected to the support frame (9).
6. The boom structure of a construction machine according to claim 1, wherein the secondary boom (2) comprises a first wall part fixedly connected to the primary boom (1) and a second wall part rotatably connected to an end of the first wall part remote from the primary boom (1).
7. The construction machinery boom structure according to claim 6, characterized in that the first bracket (3) and the second bracket (5) are connected to the main arm (1) or to the first wall part, respectively; alternatively, the first bracket (3) is connected to the first wall portion and the second bracket (5) is connected to the main arm (1).
8. The boom structure of engineering machinery according to claim 1, further comprising a driving assembly disposed between the first bracket (3) and the second bracket (5), wherein the driving assembly drives the first bracket (3) and the second bracket (5) to relatively extend or retract.
9. The construction machinery boom structure according to claim 8, wherein the driving assembly comprises a first driving member (101) and a second driving member (102), the first driving member (101) being arranged between the secondary arm (2) and the first bracket (3) or between the primary arm (1) and the first bracket (3), the second driving member (102) being arranged between the first bracket (3) and the second bracket (5).
10. The construction machinery boom structure according to claim 8, wherein the driving assembly comprises a link assembly and a third driving member (103), the link assembly being arranged between the first bracket (3) and the second bracket (5), the third driving member (103) being arranged between the link assembly and the secondary arm (2) or between the link assembly and the primary arm (1).
11. The boom structure of any one of claims 1 to 10, wherein the main arm (1) comprises a main arm body (11) and a tower cap (12), the tower cap (12) is connected between the main arm body (11) and the auxiliary arm (2), and the first bracket (3) and the second bracket (5) are respectively connected with the tower cap (12).
12. An engineering machine, characterized by comprising the engineering machine arm support structure of any one of claims 1 to 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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