CN215516434U - Crane with dual limiting mechanism - Google Patents
Crane with dual limiting mechanism Download PDFInfo
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- CN215516434U CN215516434U CN202120395086.8U CN202120395086U CN215516434U CN 215516434 U CN215516434 U CN 215516434U CN 202120395086 U CN202120395086 U CN 202120395086U CN 215516434 U CN215516434 U CN 215516434U
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- arm
- pin shaft
- shaft hole
- auxiliary
- main arm
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Abstract
The utility model discloses a crane with a double-limiting mechanism, which comprises a main arm, wherein a front support used for fixing an auxiliary arm is arranged on the side part of the main arm; the front bracket is provided with a front bracket pin shaft hole; a main arm pin shaft hole is formed in the arm head of the main arm, and an auxiliary arm pin shaft hole is formed in the arm head of the auxiliary arm; the auxiliary arm is provided with an auxiliary arm fixing hole corresponding to the position of the front support pin shaft hole; the first limiting mechanism is positioned on the side part of the arm head of the main arm and used for limiting the alignment of the auxiliary arm pin shaft hole and the main arm pin shaft hole; and the second limiting mechanism is positioned on the side part of the main arm and used for limiting the alignment of the auxiliary arm fixing hole and the front support pin shaft hole. According to the utility model, the first limiting mechanism and the second limiting mechanism are arranged to realize quick centering of the pin shaft hole, so that the difficulty in mounting the pin shaft is reduced, and the efficiency of dismounting the auxiliary arm is improved; the device is simple and reliable in structure, and the limiting size is quickly changed by adjusting the depth of the bolt screwed into the nut.
Description
Technical Field
The utility model relates to a crane with a double limiting mechanism, and belongs to the technical field of cranes.
Background
In order to obtain proper lifting height and amplitude, a crane is provided with a multi-section telescopic crane boom, but the crane is limited by structure and weight, the main boom is generally 3-7 sections, and the main boom is generally not more than 5 sections for medium-tonnage and small-tonnage cranes. In order to further extend the length of the jib to achieve higher lifting heights and amplitudes, cranes are generally also equipped with a fly jib. When the auxiliary arm is not used, the auxiliary arm is arranged on one side of the basic arm, and when the auxiliary arm is required to be used, the auxiliary arm is arranged at the head part of the tail arm and is connected with the tail arm through a pin shaft;
at present, the installation and the disassembly of the auxiliary jib of the crane are mainly completed manually, when the auxiliary jib is installed, the auxiliary jib rotates around a front support pin shaft under the action of external force, and a main arm pin shaft hole is lack of a corresponding positioning device, so that an auxiliary jib pin shaft hole cannot be quickly and accurately aligned with a main arm pin shaft hole, and a pin shaft can be installed successfully by using a tool.
When the auxiliary arm is detached, under the action of external force, the auxiliary arm rotates to the side of the main arm around the pin shaft on the right side of the arm head, and the pin shaft is difficult to install due to the fact that a positioning device is lacked at the pin shaft hole of the front support and the centering performance is poor.
The auxiliary arm rotates around the front support pin shaft under the action of external force, the rotation angle is small or large due to reasons such as inertia, the auxiliary arm cannot be stopped at the installation position quickly and accurately, the difficulty of installing the pin shaft is obviously increased, and the operation efficiency is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects that the auxiliary jib pin shaft hole cannot be quickly and accurately aligned with the main jib pin shaft hole and the installation difficulty is high due to the lack of a positioning device when the auxiliary jib is disassembled in the prior art, and provides a crane with a double limiting mechanism.
Hoist with dual stop gear, characterized by includes:
the side part of the main arm is provided with a front support for fixing the auxiliary arm; the front bracket is provided with a front bracket pin shaft hole;
a main arm pin shaft hole is formed in the arm head of the main arm, and an auxiliary arm pin shaft hole is formed in the arm head of the auxiliary arm; the auxiliary arm is provided with an auxiliary arm fixing hole corresponding to the position of the front support pin shaft hole;
the first limiting mechanism is positioned on the side part of the arm head of the main arm and used for limiting the alignment of the auxiliary arm pin shaft hole and the main arm pin shaft hole;
and the second limiting mechanism is positioned on the side part of the main arm and used for limiting the alignment of the auxiliary arm fixing hole and the front support pin shaft hole.
Further, the first limiting mechanism comprises a first bolt and a nut column;
the nut column is connected to the side part of the arm head of the main arm; the first bolt is in threaded connection with the nut column.
Further, a first nut is arranged between the first bolt and the nut column.
Further, the nut column is fixedly connected with the side part of the main arm head.
Further, the second stop gear includes the second bolt:
the second bolt is in threaded connection with the side portion of the main arm.
Further, a second nut is further arranged on the second bolt.
Compared with the prior art, the utility model has the following beneficial effects: according to the utility model, the main arm pin shaft hole and the auxiliary arm pin shaft hole are quickly centered through the first limiting mechanism, so that the centering difficulty of the main arm pin shaft hole and the auxiliary arm pin shaft hole is reduced, and the installation efficiency of the auxiliary arm is improved; the second limiting mechanism realizes quick alignment of the auxiliary arm mounting hole and the pin shaft hole of the front support, reduces the alignment difficulty of the auxiliary arm mounting hole and the pin shaft hole of the front support and improves the efficiency of disassembling the auxiliary arm;
the first limiting mechanism and the second limiting mechanism are simple and reliable in structure, and the limiting size is quickly changed by adjusting the depth of the bolt.
Drawings
FIG. 1 is an extended schematic view of the secondary arm of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of a first limiting mechanism of the present invention;
FIG. 4 is an exploded view of a first spacing mechanism of the present invention;
FIG. 5 is a schematic illustration of the retraction of the secondary arm of the present invention;
FIG. 6 is an enlarged view of the portion B of FIG. 5;
FIG. 7 is a schematic view of a front carrier pin hole;
FIG. 8 is a schematic view of a second limiting mechanism according to the present invention;
fig. 9 is an exploded view of the second spacing mechanism of the present invention.
In the figure: 1. a main arm; 2. an auxiliary arm; 3. a front bracket; 4. a main arm pin shaft hole; 5. the auxiliary arm pin shaft hole; 6. a first limit mechanism; 61. a first bolt; 62. a first nut; 63. a nut post; 7. a second limiting mechanism; 71. a second bolt; 72. a second nut; 8. a secondary arm fixing hole; 9. and a front bracket pin shaft hole.
Detailed Description
The utility model is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
Aiming at the defects of the prior art, the positioning bolt is additionally arranged at the pin shaft hole of the main arm, so that the pin shaft holes of the auxiliary arm and the main arm can be quickly and accurately aligned, the time for installing the pin shaft is obviously shortened, and the operation efficiency is improved.
As shown in fig. 1 to 9, the crane with the double-limiting mechanism comprises:
the main arm 1, the lateral part of the said main arm 1 is used for fixing the fore-stock 3 of the secondary jib 2; the front bracket 3 is provided with a front bracket pin shaft hole 9;
a main arm pin shaft hole 4 is formed in the arm head of the main arm 1, and an auxiliary arm pin shaft hole 5 is formed in the arm head of the auxiliary arm 2; an auxiliary arm fixing hole 8 is formed in the position, corresponding to the front support pin shaft hole 9, of the auxiliary arm 2;
the first limiting mechanism 6 is positioned on the side part of the arm head of the main arm 1 and used for limiting the alignment of the auxiliary arm pin shaft hole 5 and the main arm pin shaft hole 4;
the second limiting mechanism 7 is positioned on the side part of the main arm 1 and used for limiting the alignment of the auxiliary arm fixing hole 8 and the front support pin shaft hole 9;
when the auxiliary jib 2 is installed, the front support pin shaft hole 9 is connected with the auxiliary jib fixing hole 8 through a pin shaft (not shown in the figure), the auxiliary jib 2 rotates around the pin shaft under the action of external force, and the auxiliary jib pin shaft hole 5 can be quickly and accurately aligned with the main jib pin shaft hole 4 under the action of the first limiting mechanism 6, as shown in fig. 1;
when the auxiliary jib 2 is disassembled, the auxiliary jib pin shaft hole 5 and the main jib pin shaft hole 4 are connected through a pin shaft (not shown in the figure), the auxiliary jib 2 rotates to the side of the main jib 1 around the pin shaft at the part A of the jib head of the main jib 1 under the action of external force, and the auxiliary jib fixing hole 8 can be quickly and accurately aligned with the front support pin shaft hole 9 in a flush mode under the action of the second limiting mechanism 7, as shown in fig. 5.
In the present embodiment, the first limiting mechanism 6 includes a first bolt 61 and a nut post 63;
the nut column 63 is connected to the side part of the arm head of the main arm 1; the first bolt 61 is in threaded connection with the nut column 63, and a first nut 62 is arranged between the first bolt 61 and the nut column 63;
in the use, through the height of adjustment first bolt 61, pin first bolt 61 through first nut 62 and prevent that first nut 62 from rotating the skew height when the installation, when the fly jib 2 supports first bolt 61 position this moment, just in time make fly jib round pin shaft hole 5 of fly jib 2 align with main arm round pin shaft hole 4 of main arm 1, make things convenient for the round pin hub connection, thereby fly jib 2 is connected with main arm 1 when convenient and fast, the fly jib round pin shaft hole 5 can't be fast among the prior art, accurately with main arm round pin shaft hole 4 centering.
In this embodiment, the second limiting mechanism 7 includes a second bolt 71, the second bolt 71 is in threaded connection with the side portion of the main arm 1, and further, a second nut 72 is further disposed on the second bolt 71;
in the process of retracting the auxiliary arm 2, the second bolt 71 is adjusted to a proper position, so that the auxiliary arm 2 rotates along the auxiliary arm pin shaft hole 5 at the part A, and the auxiliary arm mounting hole 8 can be quickly and accurately aligned with the front support pin shaft hole 9 under the limiting of the second bolt 71;
in the utility model, the first limiting mechanism 6 adjusts the depth of screwing in the nut column 63 through the first bolt 61, the auxiliary arm pin shaft hole 5 and the main arm pin shaft hole 4 are adjusted to be aligned, a pin shaft can directly connect the auxiliary arm pin shaft hole 5 and the main arm pin shaft hole 4 conveniently, the second limiting mechanism 7 adjusts the depth of screwing in the side part of the main arm 1 through adjusting the second bolt 71, the auxiliary arm mounting hole 8 and the front support pin shaft hole 9 are adjusted to be aligned, and the first limiting mechanism 6 and the second limiting mechanism 7 are simple and reliable in structure, simple and rapid to adjust in operation on one hand, and convenient for timely changing the limiting size according to the position of the pin shaft hole on the other hand.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 by those of ordinary skill in the art through specific situations.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. Hoist with dual stop gear, characterized by includes:
the main arm (1), the lateral part of the main arm (1) is provided with a front bracket (3) used for fixing the auxiliary arm (2); the front bracket (3) is provided with a front bracket pin shaft hole (9);
a main arm pin shaft hole (4) is formed in the arm head of the main arm (1), and an auxiliary arm pin shaft hole (5) is formed in the arm head of the auxiliary arm (2); an auxiliary arm fixing hole (8) is formed in the position, corresponding to the front support pin shaft hole (9), of the auxiliary arm (2);
the first limiting mechanism (6) is positioned on the side part of the arm head of the main arm (1) and used for limiting the alignment of the auxiliary arm pin shaft hole (5) and the main arm pin shaft hole (4);
and the second limiting mechanism (7) is positioned on the side part of the main arm (1) and used for limiting the auxiliary arm fixing hole (8) to be aligned with the front support pin shaft hole (9).
2. A crane with a double spacing mechanism as claimed in claim 1, wherein the first spacing mechanism (6) comprises a first bolt (61) and a nut stud (63);
the nut column (63) is connected to the side part of the arm head of the main arm (1); the first bolt (61) is in threaded connection with the nut column (63).
3. A crane with a double spacing mechanism as claimed in claim 2,
a first nut (62) is arranged between the first bolt (61) and the nut column (63).
4. A crane with a double spacing mechanism as claimed in claim 2,
the nut column (63) is fixedly connected with the side part of the arm head of the main arm (1).
5. A crane with a double stop mechanism according to claim 4, wherein the second stop mechanism (7) comprises a second bolt (71):
the second bolt (71) is in threaded connection with the side part of the main arm (1).
6. A crane with a double limiting mechanism according to claim 5, wherein the second bolt (71) is further provided with a second nut (72).
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120395086.8U CN215516434U (en) | 2021-02-23 | 2021-02-23 | Crane with dual limiting mechanism |
| CA3204060A CA3204060A1 (en) | 2021-02-23 | 2022-02-23 | Auxiliary boom, crane, method for unfolding auxiliary boom and method for retracting auxiliary boom |
| EP22758876.1A EP4299502A1 (en) | 2021-02-23 | 2022-02-23 | Jib, crane, jib unfolding method, and jib retraction method |
| PCT/CN2022/077371 WO2022179512A1 (en) | 2021-02-23 | 2022-02-23 | Jib, crane, jib unfolding method, and jib retraction method |
| AU2022226205A AU2022226205A1 (en) | 2021-02-23 | 2022-02-23 | Jib, crane, jib unfolding method, and jib retraction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120395086.8U CN215516434U (en) | 2021-02-23 | 2021-02-23 | Crane with dual limiting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215516434U true CN215516434U (en) | 2022-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120395086.8U Active CN215516434U (en) | 2021-02-23 | 2021-02-23 | Crane with dual limiting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215516434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022179512A1 (en) * | 2021-02-23 | 2022-09-01 | 徐州重型机械有限公司 | Jib, crane, jib unfolding method, and jib retraction method |
-
2021
- 2021-02-23 CN CN202120395086.8U patent/CN215516434U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022179512A1 (en) * | 2021-02-23 | 2022-09-01 | 徐州重型机械有限公司 | Jib, crane, jib unfolding method, and jib retraction method |
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