CN215326603U - Flat-top tower crane boom with firm lower chord connection - Google Patents
Flat-top tower crane boom with firm lower chord connection Download PDFInfo
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- CN215326603U CN215326603U CN202121418295.6U CN202121418295U CN215326603U CN 215326603 U CN215326603 U CN 215326603U CN 202121418295 U CN202121418295 U CN 202121418295U CN 215326603 U CN215326603 U CN 215326603U
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- pin hole
- lower chord
- positioning shaft
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Abstract
The utility model provides a flat-head tower crane boom with a lower chord firm in connection, which comprises a plurality of single-section arms connected in sequence, wherein the front end and the rear end of one side of a lower chord of each single-section arm are symmetrically provided with a front positioning shaft and a rear positioning shaft, the front end and the rear end of one side of the lower chord of each single-section arm are also symmetrically provided with a front pin hole and a rear pin hole, the front pin hole and the rear pin hole are arranged between the front positioning shaft and the rear positioning shaft, the front end and the rear end of the other side of the lower chord of each single-section arm are respectively symmetrically provided with a front clamping groove and a rear clamping groove matched with the front positioning shaft and the rear positioning shaft, and the front end and the rear end of the other side of the lower chord of each single-section arm are also symmetrically provided with a front pin hole and a rear pin hole matched with the front pin hole and the rear pin hole. The utility model has the beneficial effects that: each section of single-section arm is fixed with the through hole and the positioning shaft and the clamping groove through the lock pin, so that the mounting and the dismounting are convenient, the problem of bolt looseness is effectively solved, the potential safety hazard is avoided, and the connection strength is improved.
Description
Technical Field
The utility model belongs to the field of building hoisting machinery, and particularly relates to a flat-top tower crane boom with a lower chord and firm connection.
Background
The crane boom is generally of a truss structure and is used as an important component of the hoisting machinery, and the reasonable structure and the strength of the connection structure between the boom sections play an important role in the stability and safety of the whole hoisting machinery. In a traditional tower crane, the lower chord of a cargo boom of a flat-top tower crane is usually connected by bolts, so that the requirement on the connection strength of large mechanical action cannot be met sometimes, and potential safety hazards exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a flat-top tower crane boom with a lower chord firm in connection, which effectively solves the problem of bolt looseness, avoids potential safety hazards, is convenient to mount and dismount, and is particularly suitable for being used at a lower chord connection structure of the flat-top tower crane boom.
The technical scheme of the utility model is as follows: a flat-head tower crane boom with a lower chord firm in connection comprises a plurality of single-section arms which are connected in sequence, wherein a front positioning shaft and a rear positioning shaft are symmetrically arranged at the front end and the rear end of one side of a lower chord of each single-section arm, a front pin hole and a rear pin hole are symmetrically arranged at the front end and the rear end of one side of the lower chord of each single-section arm, the front pin hole and the rear pin hole are arranged between the front positioning shaft and the rear positioning shaft, a front clamping groove and a rear clamping groove which are matched with the front positioning shaft and the rear positioning shaft are symmetrically arranged at the front end and the rear end of the other side of the lower chord of each single-section arm respectively, a front locking pin and a rear locking pin which are matched with the front pin hole and the rear pin hole are symmetrically arranged at the front end and the rear end of the other side of the lower chord of each single-section arm, the front locking pin and the rear locking pin of one single-section arm respectively penetrate through the front pin hole and the rear pin hole of the other single-section arm, and the front locking pin and the rear wedge block which are arranged at the left of the front pin hole and the rear pin are respectively arranged on the front pin and the front pin hole, The rear wedge block passes through the front wedge block hole and the rear wedge block hole, and the front wedge block and the rear wedge block are respectively clamped in the front wedge block hole and the rear wedge block hole.
Preferably, the upper chord connecting structure of the single-section arm is consistent with the prior art, namely, a locking pin or a bolt or welding fixation is adopted.
Preferably, the front ends of the front positioning shaft and the rear positioning shaft are respectively provided with a front convex head and a rear convex head.
Preferably, preceding draw-in groove, back draw-in groove all include first groove, the second groove that communicates in proper order, and the internal diameter in first groove is less than the second groove, preceding protruding head passes the first groove of preceding draw-in groove respectively and establishes the second inslot at preceding draw-in groove, back protruding head passes the first groove of back draw-in groove respectively and establishes the second inslot at back draw-in groove.
The utility model has the advantages and positive effects that: by adopting the technical scheme, each section of single-section arm is fixed with the through hole and the positioning shaft and the clamping groove through the lock pin, so that the installation and the disassembly are convenient, the problem of bolt looseness is effectively solved, the potential safety hazard is avoided, and the connection strength is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic view of a single-joint arm.
Fig. 3 is a partially enlarged view of a portion a of fig. 1.
Fig. 4 is a sectional view at B-B of fig. 2.
In the figure:
1. single-section arm 2, lower chord 3 and front positioning shaft
4. Rear positioning shaft 5, front pin hole 6 and rear pin hole
7. Front clamping groove 8, rear clamping groove 9 and front lock pin
10. Rear lock pin 11, front wedge 12, front convex head.
Detailed Description
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in figures 1-4, the technical scheme of the utility model is that a flat-head tower crane boom with a lower chord firmly connected comprises a plurality of single-section arms 1 which are connected in sequence, wherein the front end and the rear end of one side of a lower chord 2 of each single-section arm 1 are symmetrically provided with a front positioning shaft 3 and a rear positioning shaft 4, the front end and the rear end of one side of the lower chord 2 of each single-section arm 1 are also symmetrically provided with a front pin hole 5 and a rear pin hole 6, the front pin hole 5 and the rear pin hole 6 are arranged between the front positioning shaft 3 and the rear positioning shaft 4, the front end and the rear end of the other side of the lower chord 2 of each single-section arm 1 are respectively and symmetrically provided with a front clamping groove 7 and a rear clamping groove 8 which are matched with the front positioning shaft 3 and the rear positioning shaft 4, the front end and the rear end of the other side of the lower chord 2 of each single-section arm 1 are respectively and symmetrically provided with a front locking pin 9 and a rear locking pin 10 which are matched with the front pin hole 5 and the rear pin hole 6, and a front locking pin 9 and a rear locking pin 10 of one single-section arm 1, The rear lock pin 10 penetrates through a front pin hole 5 and a rear pin hole 6 of the other single-section arm 1 respectively, a front wedge block hole and a rear wedge block hole for a front wedge block 11 and a rear wedge block to penetrate through are formed in the front lock pin 9 and the rear lock pin 10 which are located on the left sides of the front pin hole 5 and the rear pin hole 6 respectively, and the front wedge block 11 and the rear wedge block are clamped in the front wedge block hole and the rear wedge block hole respectively.
In this embodiment, the upper chord connecting structure of the single-section arm 1 is the same as that in the prior art, and is fixed by a lock pin or a bolt or welding.
In this embodiment, the front ends of the front positioning shaft 3 and the rear positioning shaft 4 are respectively provided with a front protruding head 12 and a rear protruding head.
In this embodiment, the front card slot 7 and the rear card slot 8 respectively include a first slot and a second slot which are communicated in sequence, the inner diameter of the first slot is smaller than that of the second slot, the front protruding head 12 respectively penetrates through the first slot of the front card slot 7 and is arranged in the second slot of the front card slot, and the rear protruding head respectively penetrates through the first slot of the rear card slot 8 and is arranged in the second slot of the rear card slot.
The working process and principle of the example are as follows: when the single-section arm installing tool is used, the front positioning shaft and the rear positioning shaft of one single-section arm are respectively inserted into the front clamping groove and the rear clamping groove of the other single-section arm, the front lock pin and the rear lock pin of one single-section arm are respectively inserted into the front pin hole and the rear pin hole of the other single-section arm, the front wedge block and the rear wedge block are respectively clamped in the front wedge block hole and the rear wedge block hole to further fix the single-section arm, and the installation operation of a plurality of single-section arms is realized by analogy in sequence.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the utility model. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (4)
1. The utility model provides a crew cut tower machine jib loading boom with lower chord firm in connection which characterized in that: the front and rear ends of the other side of the lower chord of the single-section arm are respectively and symmetrically provided with a front lock pin and a rear lock pin which are matched with the front pin hole and the rear pin hole, the front and rear ends of the other side of the lower chord of the single-section arm are respectively and symmetrically provided with a front clamp groove and a rear clamp groove which are matched with the front positioning shaft and the rear positioning shaft, the front and rear ends of the other side of the lower chord of the single-section arm are respectively and symmetrically provided with a front lock pin and a rear lock pin which are matched with the front pin hole and the rear pin hole, the front lock pin and the rear lock pin of one single-section arm respectively penetrate through the front pin hole and the rear pin hole of the other single-section arm, and the front lock pin and the rear lock pin which are positioned on the left side of the front pin hole and the rear pin hole are respectively provided with a front wedge block hole through which the front wedge and the rear wedge pass through, And the front wedge block and the rear wedge block are respectively clamped in the front wedge block hole and the rear wedge block hole.
2. The flat head tower crane boom with the lower chord firmly connected according to claim 1, characterized in that: the upper chord connecting structure of the single-section arm is fixed by adopting a lock pin or a bolt or welding.
3. The flat head tower crane boom with the lower chord firmly connected according to claim 1, characterized in that: the front ends of the front positioning shaft and the rear positioning shaft are respectively provided with a front convex head and a rear convex head.
4. The flat head tower crane boom with the lower chord firmly connected according to claim 1, characterized in that: preceding draw-in groove, back draw-in groove all including the first groove, the second groove that communicate in proper order, and the internal diameter in first groove is less than the second groove, preceding protruding head passes the first groove of preceding draw-in groove respectively, and establish the second inslot at preceding draw-in groove, back protruding head passes the first groove of back draw-in groove respectively, and establishes the second inslot at back draw-in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121418295.6U CN215326603U (en) | 2021-06-25 | 2021-06-25 | Flat-top tower crane boom with firm lower chord connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121418295.6U CN215326603U (en) | 2021-06-25 | 2021-06-25 | Flat-top tower crane boom with firm lower chord connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215326603U true CN215326603U (en) | 2021-12-28 |
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ID=79561367
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121418295.6U Active CN215326603U (en) | 2021-06-25 | 2021-06-25 | Flat-top tower crane boom with firm lower chord connection |
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| Country | Link |
|---|---|
| CN (1) | CN215326603U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4299501A1 (en) * | 2022-06-30 | 2024-01-03 | WOLFFKRAN Holding AG | Connecting device for connecting boom segments of a boom of a tower crane |
| CN117529443A (en) * | 2022-06-30 | 2024-02-06 | 沃尔夫控股公司 | Connecting device for connecting boom sections of a tower crane boom |
-
2021
- 2021-06-25 CN CN202121418295.6U patent/CN215326603U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4299501A1 (en) * | 2022-06-30 | 2024-01-03 | WOLFFKRAN Holding AG | Connecting device for connecting boom segments of a boom of a tower crane |
| CN117529443A (en) * | 2022-06-30 | 2024-02-06 | 沃尔夫控股公司 | Connecting device for connecting boom sections of a tower crane boom |
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