CN213894996U - Main chord member, standard knot and tower crane - Google Patents
Main chord member, standard knot and tower crane Download PDFInfo
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- CN213894996U CN213894996U CN202021805205.4U CN202021805205U CN213894996U CN 213894996 U CN213894996 U CN 213894996U CN 202021805205 U CN202021805205 U CN 202021805205U CN 213894996 U CN213894996 U CN 213894996U
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Abstract
The utility model relates to a tower machine technical field specifically relates to a main chord member, standard festival and tower machine. The main chord member (1) comprises a main chord member body (2) and a plurality of connecting members (3), the connecting members (3) are distributed at intervals in the circumferential direction of the main chord member body (2) and are arranged on the main chord member body (2), and the main chord member body (2) and a plurality of joints of the connecting members (3) are distributed in a regular polygon shape. The main chord member is through setting up a plurality of connecting pieces on the main chord member body to a plurality of connecting pieces are regular polygon and distribute, when standard festival main chord member receiving pressure and pulling force, are favorable to the main chord member more balanced in a plurality of connecting piece department atresss, and the main chord member of being convenient for offsets each other in the atress of a plurality of connecting pieces departments, and then has alleviated the stress concentration of main chord member in the handing-over department of main chord member body and connecting piece, has prolonged fatigue life.
Description
Technical Field
The utility model relates to a tower machine technical field specifically relates to a main chord member, standard festival and tower machine.
Background
As an important component of the tower crane, the reasonable design of the standard knot plays a crucial role in the stability and safety of the whole tower crane.
At present, a tower crane standard knot generally comprises a plurality of main chords and a plurality of web members, wherein the main chords are kept at intervals, and the web members are used for connecting two adjacent main chords; the main chord comprises a main chord body connected with the web members, the main chord body is generally a molded square tube, the top and the bottom of the main chord body are generally respectively provided with 2-3 connecting sleeves, the connecting sleeves are generally distributed on the same side of at least one diagonal line of the molded square tube by taking the top of the main chord body as an example, so that the problem of stress concentration of the main chord at the connecting sleeves is caused, and the fatigue life is short.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the top adapter sleeve (or, the bottom adapter sleeve) of standard festival main chord member that prior art exists and being in the short problem of fatigue life that causes with one side of at least one diagonal of shaping side pipe, provide a main chord member, standard festival and tower machine, this main chord member is regular polygon through setting up a plurality of connecting pieces 3 and distributes for the adapter sleeve atress is more balanced, has alleviated stress concentration, has prolonged fatigue life.
In order to achieve the above object, an aspect of the present invention provides a main chord, the main chord includes a main chord body and a plurality of connecting pieces, and is a plurality of the connecting pieces are followed interval distribution in the circumferential direction of the main chord body and set up in the main chord body, and the main chord body with a plurality of handing-over departments of the connecting pieces are regular polygon distribution.
Optionally, the regular polygon is a regular triangle, the number of the connecting pieces is three, the cross section of the main chord body is a rectangle, and the connecting pieces are arranged on two sides of any symmetrical plane of the rectangle.
Optionally, the three connecting members are divided into a first connecting member, a second connecting member and a third connecting member, the cross section of the main chord body is square, the first connecting member and the second connecting member are respectively disposed on two intersecting sides of the square and extend outward perpendicular to the respective sides, and the third connecting member is disposed at a corner of the square far away from the two sides and extends outward along an extending direction of a diagonal of the square at the corner.
Optionally, in the height direction of the main chord body, the plurality of connecting pieces are arranged in a uniform cross section.
Optionally, the connecting piece has a mounting hole arranged along the length direction of the main chord body.
Optionally, in the length direction of the main chord body, the connecting piece includes a first end and a second end that are arranged oppositely, the first end of the connecting piece is a planar structure and is flush with the end face of the main chord body, and the second end of the connecting piece includes a slope surface that faces the mounting hole from the joint of the connecting piece and is inclined towards the first end of the connecting piece.
Optionally, it is a plurality of the connecting piece forms coupling assembling jointly, the main chord member is including setting up respectively two sets of the relative both sides on the length direction of main chord member body coupling assembling.
The utility model discloses the second aspect still provides a standard festival, standard festival includes a plurality of main chords, it is a plurality of the main chord is parallel to each other and keeps the interval, standard festival is including connecting two adjacent connecting rod between the main chord.
The utility model discloses the third aspect still provides a tower machine, the tower machine include standard festival.
Through the technical scheme, the utility model provides a main chord member, standard festival and tower machine, main chord member is through setting up a plurality of connecting pieces on main chord member body to a plurality of connecting pieces are regular polygon and distribute, when standard festival main chord member receiving pressure and pulling force, are favorable to main chord member more balanced in a plurality of connecting piece department atresss, and the main chord member of being convenient for offsets each other at the atress of a plurality of connecting pieces departments, and then has alleviated the stress concentration of main chord member in the handing-over department of main chord member body and connecting piece, has prolonged fatigue life.
Drawings
Fig. 1 is a schematic structural diagram of a standard knot provided by the present invention;
FIG. 2 is a schematic structural view of the main chord of the standard knot shown in FIG. 1;
FIG. 3 is a top (or bottom) view of the main chord of FIG. 2.
Description of the reference numerals
1. A main chord; 2. a main chord body; 3. a connecting member; 4. a first connecting member; 5. a second connecting member; 6. a third connecting member; 7. mounting holes; 8. a slope surface; 9. a connecting assembly; 10. a connecting rod; 11. diagonal web members.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
The utility model discloses a first aspect provides a main chord member, as shown in fig. 1-3, main chord member 1 includes main chord member body 2 and a plurality of connecting piece 3, and is a plurality of connecting piece 3 is followed interval distribution in the circumference direction of main chord member body 2 and set up in main chord member body 2, and main chord member body 2 with a plurality of handing-over departments of connecting piece 3 are regular polygon and distribute.
Through the technical scheme, the utility model provides a main chord member, standard festival and tower machine, main chord member 1 is through setting up a plurality of connecting pieces 3 on main chord member body 2 to a plurality of connecting pieces 3 are regular polygon and distribute, when standard festival main chord member 1 is receiving pressure and pulling force, be favorable to main chord member 1 more balanced in a plurality of connecting pieces 3 department atress, the main chord member 1 of being convenient for offsets each other at the atress of a plurality of connecting pieces 3 departments, and then alleviated main chord member 1 and concentrated in the stress of main chord member body 2 and connecting piece 3 handing-over department, through finite element analysis and experimental verification, main chord member 1 has obvious improvement in the fatigue life of main chord member body 2 and connecting piece 3 handing-over department.
It should be noted that the main chord body 2 and the connecting member 3 may form various joints in a reasonable manner, for example, a plurality of joints may be disposed on the same cross section of the main chord body 2, and the plurality of joints are distributed in a regular polygon manner, that is, the midpoints of the intersecting portions of the joints, which are cut by the cross section, are distributed in a regular polygon manner; or, the plurality of joints may not be disposed on the same cross section of the main chord body 2, and the plurality of joints are distributed in a regular polygon, that is, the joints are distributed in a regular polygon along the middle point of a projection of a certain cross section in the length direction of the main chord body 2. The main chord body 2 can be provided with cross sections of various shapes, such as polygonal structures like a triangle, a quadrangle, a pentagon, etc.; moreover, depending on the specific shape of the cross section of the main chord body 2, a plurality of junctions of the main chord body 2 and the connecting members 3 may be arranged in various reasonable regular polygonal distributions, for example, regular polygons such as regular triangles, regular quadrangles, and regular pentagons.
Further, regular polygon is regular triangle, and is a plurality of connecting piece 3 sets up to three, main chord body 2's cross section is the rectangle, the both sides equipartition of arbitrary plane of symmetry of rectangle has been put connecting piece 3 is favorable to a plurality of connecting pieces 3 to form more stable triangular supports in main chord body 2's circumference for main chord 1 is more balanced in the 3 atress of a plurality of connecting pieces, makes overall structure can smooth transition, is showing and has reduced stress concentration. When the rectangular cross section of the main chord body 2 is rectangular, the main chord body 2 comprises two symmetrical planes, namely planes formed by extending two rectangular diagonals along the length direction of the main chord body 2 respectively; the connecting pieces 3 are arranged on two sides of any one of the two rectangular symmetrical surfaces, namely the connecting pieces 3 are arranged on two sides of any one of the two rectangular symmetrical surfaces; it is noted that the connecting elements 3 located at the corners of the rectangle do not belong to the two sides of the plane of symmetry located at the corners of the rectangle.
According to some embodiments of the present invention, in the main chord 1, two connecting members 3 are distributed at intervals on one long side of the rectangle, and the other connecting member 3 is located on the other long side of the rectangle, so that the number of the connecting members distributed on both sides of any symmetrical plane of the rectangle is 1 and 2 respectively; or, two connecting pieces 3 are respectively located on two long sides of the connecting piece 3, and the other connecting piece 3 is located at the corner of the rectangle, so that the number of the connecting pieces distributed on two sides of the symmetrical plane where the corner of the rectangle is located is 1, and the number of the connecting pieces distributed on two sides of the other symmetrical plane of the rectangle is 1 and 2 respectively; of course, other positions of the three connecting elements 3 can also be used, for example, one of the connecting elements 3 can also be arranged on the short side of a rectangle, which is not illustrated here.
According to other specific embodiments of the present invention, as shown in fig. 3, it is three the connecting member 3 is divided into a first connecting member 4, a second connecting member 5 and a third connecting member 6, the cross section of the main chord body 2 is square, the first connecting member 4 and the second connecting member 5 are respectively disposed on two intersecting sides of the square and perpendicular to the sides respectively extend outward, the third connecting member 6 is disposed at the corner of the square far away from the two sides and along the extending direction of the diagonal of the square at the corner, which is favorable for further reducing the stress concentration. When a heavy object is hoisted by the tower crane, the tower body can bear large pressure, so that two main chords 1 of two adjacent standard knots, which are in contact with each other, are stressed, specifically, in the length direction of the main chord body 2, the two adjacent standard knots are respectively subjected to pressure transmission through the two main chord bodies 2 in contact with each other and the two connecting pieces 3 in contact with each other, and the main chords 1 are stressed in balance at the connecting pieces 3 by uniformly arranging the connecting pieces 3; when the tower machine transported the heavy object downwards, the body of the tower can bear very big pulling force, and two adjacent standard festival mainly come transmission pulling force through two adjacent connecting piece 3, when main chord 1 received pulling force in the below side that is located main chord body 2 shown in fig. 3, then first connecting piece 4 department received when great extrusion, second connecting piece 5 and third connecting piece 6 received the pulling force effect simultaneously, in view of main chord 1's whole stress balance, through evenly arranging a plurality of connecting pieces 3, can show the pulling force value that reduces second connecting piece 5 and third connecting piece 6 and bear separately, thereby fatigue life has been improved.
Further, on the direction of height of main chord body 2 (i.e. the length direction of main chord body 2), a plurality of connecting piece 3 is the cross-section setting of equalling, is favorable to a plurality of connecting pieces 3 to evenly arrange for main chord 1 is in a plurality of connecting piece 3 department atress equilibrium, is showing the fatigue life who has improved between connecting piece 3 and the main chord main part 2.
Further, the connecting piece 3 is provided with mounting holes 7 arranged along the length direction of the main chord body 2, and when the connecting piece is used, in order to assemble two adjacent main chords 1 of two adjacent standard knots, the mounting holes 7 of the two adjacent connecting pieces 3 of the two adjacent main chords 1, which are penetrated through by fasteners such as bolts, can be completed, so that the connecting piece is simple in structure, quick to operate and convenient to manufacture and disassemble.
Further, in the length direction of main chord body 2, connecting piece 3 includes relative first end and the second end that sets up, the first end of connecting piece 3 be planar structure and with the terminal surface of main chord body 2 flushes, the second end of connecting piece 3 includes certainly handing-over department orientation of connecting piece 3 mounting hole 7 and slope orientation the slope face 8 that the first end of connecting piece 3 set up, through set up slope face 8 on connecting piece 3, reduced the height of mounting hole 7, be convenient for fasteners such as assembly bolt, still increased the height of handing-over department between connecting piece 3 and the main chord main part 2, enlarged fixed area between the two, improved the bulk strength of main chord 1.
Further, it is a plurality of connecting piece 3 forms coupling assembling 9 jointly, main chord 1 is including setting up respectively two sets of the relative both sides on the length direction of main chord body 2 coupling assembling 9 for the standard festival can assemble with two adjacent standard festivals respectively through two sets of coupling assembling of main chord 1, is convenient for operate and assemble.
The second aspect of the present invention also provides a standard knot, as shown in fig. 1, the standard knot includes a plurality of main chords 1, a plurality of main chords 1 are parallel to each other and keep the interval, the standard knot includes a connecting rod 10 connected between two adjacent main chords 1. The connecting rod 10 can be in various reasonable forms, for example, it can be a straight web member and an oblique web member shown in fig. 1, and the straight web member and the oblique web member are connected between two adjacent main chords 1 to form a rectangular frame with the four main chords 1; the connecting rod 10 can also comprise diagonal web members 11, and two ends of the diagonal web members 11 can be respectively connected with the connecting pieces 3 of the two main chords 1 on the same diagonal line of the rectangular frame, so that the structural stability of the whole standard knot is enhanced.
The third aspect of the utility model also provides a tower crane, the tower crane include standard festival.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide a solution of the present invention with a plurality of simple modifications to avoid unnecessary repetition, and the present invention is not described separately for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (9)
1. The utility model provides a main chord member, its characterized in that, main chord member (1) includes main chord member body (2) and a plurality of connecting piece (3), and is a plurality of connecting piece (3) are followed interval distribution in the circumferential direction of main chord member body (2) and set up in main chord member body (2), and main chord member body (2) with a plurality of handing-over departments of connecting piece (3) are regular polygon and distribute.
2. The main chord according to claim 1, wherein the regular polygon is a regular triangle, the number of the connecting pieces (3) is three, the cross section of the main chord body (2) is a rectangle, and the connecting pieces (3) are arranged on two sides of any symmetrical plane of the rectangle.
3. The main chord according to claim 2, characterized in that three of the connecting pieces (3) are divided into a first connecting piece (4), a second connecting piece (5) and a third connecting piece (6), the cross section of the main chord body (2) is square, the first connecting piece (4) and the second connecting piece (5) are respectively arranged on two intersecting sides of the square and extend outwards perpendicular to the respective sides, and the third connecting piece (6) is arranged at a corner of the square remote from the two sides and extends outwards in the extension direction of a diagonal of the square at the corner.
4. A main chord according to claim 1, characterized in that a plurality of said connectors (3) are of uniform cross-section in the height direction of the main chord body (2).
5. A main chord according to any of the claims 1-4, characterized in that the connecting piece (3) has mounting holes (7) arranged in the length direction of the main chord body (2).
6. The main chord according to claim 5, characterized in that the connecting piece (3) comprises a first end and a second end arranged oppositely in the length direction of the main chord body (2), the first end of the connecting piece (3) is of a planar structure and is flush with the end surface of the main chord body (2), and the second end of the connecting piece (3) comprises a slope surface (8) arranged from the intersection of the connecting piece (3) towards the mounting hole (7) and obliquely towards the first end of the connecting piece (3).
7. A main chord according to claim 6, characterized in that a plurality of said connecting pieces (3) together form a connecting assembly (9), said main chord (1) comprising two sets of said connecting assemblies (9) arranged on opposite sides of the main chord body (2) in the length direction, respectively.
8. A modular segment, characterized in that it comprises a plurality of main chords (1) according to any one of claims 1 to 7, the main chords (1) being parallel to each other and spaced apart, the modular segment comprising connecting rods (10) connected between two adjacent main chords (1).
9. Tower crane, characterized in that it comprises a standard knot according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021805205.4U CN213894996U (en) | 2020-08-25 | 2020-08-25 | Main chord member, standard knot and tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021805205.4U CN213894996U (en) | 2020-08-25 | 2020-08-25 | Main chord member, standard knot and tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213894996U true CN213894996U (en) | 2021-08-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021805205.4U Active CN213894996U (en) | 2020-08-25 | 2020-08-25 | Main chord member, standard knot and tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213894996U (en) |
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2020
- 2020-08-25 CN CN202021805205.4U patent/CN213894996U/en active Active
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