CN216005024U - Connection form of crane truss arm - Google Patents
Connection form of crane truss arm Download PDFInfo
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- CN216005024U CN216005024U CN202121823622.6U CN202121823622U CN216005024U CN 216005024 U CN216005024 U CN 216005024U CN 202121823622 U CN202121823622 U CN 202121823622U CN 216005024 U CN216005024 U CN 216005024U
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Abstract
The utility model relates to the technical field of crane truss structures, and provides a connection form of a crane truss arm. The connector is including the mushroom head section, the neck section, semicircle section and the changeover portion that connect gradually, neck section and semicircle section are that the cross-section is semicircular spatial structure, be fixed with the strengthening rib between semicircle section and the changeover portion, one side of mushroom head section is equipped with the section, the strengthening rib with the section agrees with mutually. The length of the long axis of the mushroom head section is the same as the diameter of the cross section of the semicircular section, the length of the short axis of the mushroom head section is the same as the diameter of the cross section of the neck section, the length of the long axis of the mushroom head section is larger than the diameter of the cross section of the neck section, and the clamping plate is of an annular structure. The utility model can be conveniently disassembled and assembled, reduces the operation difficulty of installation operation and reduces the cost.
Description
Technical Field
The utility model relates to the technical field of crane truss structures, in particular to a connection form of a crane truss arm.
Background
At present, a truss is widely applied to various large mechanical devices as a common structural form, for example, a boom of some cranes is a truss structure with large stress. The truss is mainly made by chord member and web member welding, and for the convenience of transportation, many truss structures are made the multistage standard festival of limited length, and during the practical application, each section standard festival is connected to the rethread certain mode.
The connection forms of the existing truss structures mainly include the following types: 1. welding on site: the method is applied to a permanent non-detachable structure, and the welding method is not detachable. 2. Bolt connection: when adopting bolted connection, the quantity of bolt is more, and the higher connection of some requirements needs to use the high strength bolt, needs to reach certain pretightning force moreover, and the installation degree of difficulty is great. In addition, the high-strength bolt can be used only once, and the cost is relatively high. 3. Pin shaft connection: when the pin shaft is used for connection, the pin shaft and the pin hole of the lug plate have high matching precision requirement, and the field installation difficulty is high.
Therefore, there is an urgent need for a connection form of a crane truss arm that is easy to assemble and disassemble, low in cost, and easy to operate.
SUMMERY OF THE UTILITY MODEL
The utility model mainly solves the technical problems of high cost, high operation difficulty and the like in the prior art, and provides a connection form of a crane truss arm so as to achieve the purpose of improving the hoisting precision and reliability. The utility model aims to overcome the defects of the prior art and provide a connection scheme of a crane truss arm, which is convenient to disassemble and assemble, reduces the operation difficulty of installation operation and reduces the cost.
The utility model provides a connection form of a crane truss arm, which comprises a clamping plate 2, a screw group 3 and a pair of connectors 1.
The length of the long axis of the mushroom head section 11 is the same as the diameter of the section of the semicircular section 13, the length of the short axis of the mushroom head section 11 is the same as the diameter of the section of the neck section 12, and the length of the long axis of the mushroom head section 11 is larger than the diameter of the section of the neck section 12; the clamping plate 2 is of an annular structure, the short inner diameter length of the clamping plate 2 is the same as the diameter of the section of the neck section 12, the long inner diameter length of the clamping plate 2 is the same as the length of the long shaft of the mushroom head section 11, and the clamping plate 2 and the pair of connectors 1 can be fixedly connected through the screw group 3.
Further, the right side of the transition section 14 is connected with a welding section 15, and a welding seam 17 is arranged between the transition section 14 and the welding section 15.
Further, the transition section 14 is a cylindrical structure.
Further, the cross-sectional diameter of the transition section 14 is larger than that of the semicircular section 13.
Further, screw holes 19 are formed in the clamping plate 2 and the transition section 14, and the screw group 3 can penetrate through the screw holes 19.
Further, the number of the screw groups 3 is 2.
Compared with the prior art, the method has the following advantages:
1. the installation is convenient: firstly, a clamping plate with a long round hole is installed on one truss end connector, after the other truss end connector is installed in place, the two connectors are combined into a shape similar to a cylinder, and the clamping plate is rotated to be clamped on the necking section of the cylinder. The clamping plate is fixed through the screw, so that the phenomenon that the clamping plate rotates mistakenly to cause connection failure in the use process is prevented.
2. The reliability is high: because the connector sections of the two truss standard joints support the outer surface of the transition section of the connector of the other side, the axial pressure can be borne, and when the connector sections are pulled, the clamping plates act to bear the tensile force.
3. The precision requirement is low, the installation is convenient and quick, and the installation process can be completed only by manual operation.
4. The added section 18 can reduce the weight of the device, and the reinforcing rib 16 increases the connecting area between the semicircular section 13 and the transition section 14, thereby increasing the stability; the reinforcing ribs 16 are fitted to the cross-section 18, increasing the overall stability of the crane truss arm.
Drawings
Fig. 1 is a schematic view of a truss connection provided by the present invention.
Fig. 2 is a schematic (top view) of a connection head of a connection form of a crane truss arm provided by the present invention.
Fig. 3 is a schematic view (front view) of a connection head of a connection form of a crane truss arm provided by the present invention.
Fig. 4 is a schematic (side view) of a connection head of a connection form of a crane truss arm provided by the present invention.
Fig. 5 is a schematic view of a connection head of a connection form of a crane truss arm provided by the present invention.
Figure 6 is a schematic view of a pallet of the connection form of the crane boom arm provided by the present invention.
Figure 7 is a schematic view of a pallet of the present invention in the form of a connection of crane boom arms.
Fig. 8 is a pre-installation exploded schematic view of a connection form of a crane truss arm provided by the present invention.
Fig. 9 is an exploded view of the connection form of the crane boom arm provided by the present invention after installation.
Fig. 10 is a schematic view of the installation process of the connection form of the crane truss arm provided by the utility model.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting of the utility model. It should be further noted that, for the convenience of description, only some but not all of the relevant aspects of the present invention are shown in the drawings.
Referring to fig. 1 to 5, the utility model provides a connection form of a crane truss arm, which comprises a clamping plate 2, a screw group 3 and a pair of connectors 1, wherein each connector 1 comprises a mushroom head section 11, a necking section 12, a semicircular section 13 and a transition section 14 which are sequentially connected, the necking section 12 and the semicircular section 13 are of a three-dimensional structure with semicircular sections, a reinforcing rib 16 is fixed between the semicircular section 13 and the transition section 14, one side of the mushroom head section 11 is provided with a section 18, and the reinforcing rib 16 is matched with the section 18.
Specifically, the pair of connectors 1 is two connectors 1, and the two connectors 1 have the same structure. The reinforcing rib 16 is used for increasing the contact area between the semicircular section 13 and the transition section 14 and enhancing the stability; the section 18 can be a cut surface, so that the section 18 can be matched with the reinforcing rib 16 when the two connectors 1 are butted with each other while the weight is reduced.
The length of the long axis of the mushroom head section 11 is the same as the diameter of the section of the semicircular section 13, the length of the short axis of the mushroom head section 11 is the same as the diameter of the section of the neck section 12, and the length of the long axis of the mushroom head section 11 is larger than the diameter of the section of the neck section 12; the clamping plate 2 is of an annular structure, the short inner diameter length of the clamping plate 2 is the same as the diameter of the section of the neck section 12, the long inner diameter length of the clamping plate 2 is the same as the length of the long shaft of the mushroom head section 11, and the clamping plate 2 and the pair of connectors 1 can be fixedly connected through the screw group 3.
Specifically, referring to FIGS. 2 and 3, the length (diameter) of the major axis of the mushroom head section 11 is φ m, and the diameter (cross-sectional diameter) of the neck section is φ s, φ m > φ s. The mushroom head 11 has a minor axis length rm and a major axis length (diameter) m, rm being phim/2. The diameter of the neck-reducing section φ s may be less than the diameter of the mushroom head section φ m. One part of the outer side surface of the mushroom head section needs to be milled away, so that the processing surface is tangent to the neck-reducing section.
Referring to fig. 6, the length of the long inner diameter (the diameter of the inner hole) of the clamping plate 2 is phi, the diameter phi of the inner hole of the clamping plate 2 is equal to or slightly larger than the diameter phi m of the mushroom head of the connecting head 1, and the distance b of the straight line section of the inner hole is equal to or slightly larger than the diameter phi s of the necking section of the connecting head 1. Depending on the manufacturing process, the card 2 can also be manufactured according to fig. 7.
As shown in fig. 7, the shape of the inner hole of the clamping plate 2 is a combination of another semicircle and a rectangle, the radius of the semicircle is r, and the distance between two straight line segments is b, wherein r is b/2. This design ensures that the card 2 fits over the exterior of the connector 1 and that the card 2 can snap into the necked section 12 of the connector 1.
The straight edge of the oblong hole of the clamping plate 2 is parallel to the diameter of the semicircular section of the connecting head 1. The straight edge of the oblong hole of the clamping plate 2 is perpendicular to the diameter of the semicircular section of the connecting head 1, so that the clamping plate 2 is clamped at the necking part of the connecting head 1, and the clamping plate 2 is fixed by the screw group 3 to prevent the clamping plate 2 from rotating mistakenly to cause connection failure.
Further, the right side of the transition section 14 is connected with a welding section 15, a welding seam 17 is arranged between the transition section 14 and the welding section 15, the transition section 14 and the welding section 15 are fixedly welded through the welding seam 17, and the welding section 15 is used for being welded with other components.
Further, the transition section 14 is a cylindrical structure, and may be other cylindrical structures, but is not limited thereto. Further, the cross-sectional diameter of the transition section 14 is larger than that of the semicircular section 13. In particular, the transition section 14 has a slightly larger cross-sectional diameter for supporting the other mushroom head section 11.
Further, the clamping plate 2 and the transition section 14 are both provided with screw holes 19 (fig. 4), and the screw group 3 can pass through the screw holes 19. Further, the number of the screw groups 3 is 2.
Specifically, screw group 3 can pass screw 19 is with a set of connector 1 reciprocal anchorage, and the quantity of screw group 3 can be a plurality of, as long as fix cardboard 2 can.
The end of the truss chord is welded with a connector 1. The connector 1 is divided into five parts, namely a welding section 15, a transition section 14, a semicircular section 13, a necking section 12 and a mushroom head section 11 from the root to the end. The cross section of the whole body outside the transition section 14 is semicircular, the diameter of the necking section 12 is smaller, a part of the side surface of the mushroom head section 11 is milled, and the formed plane is tangent to the excircle of the necking section.
During installation, a clamping plate 2 with a long round hole is installed on one truss end connector, after the other truss end connector 1 is installed in place, the two connectors 1 are combined into a shape similar to a cylinder, and the clamping plate 2 is rotated to clamp the clamping plate 2 on the necking section 12 of the cylinder. Through 3 fixed cardboard 2 of screw rod, prevent that cardboard 2 miscorrotation from arousing to connect inefficacy in the use. The cross section of the connecting 1 head of the two standard truss sections is propped against the outer surface of the transition 14 section of the other connecting head, so that the axial pressure can be borne. When pulled, the clamping plate 2 acts to bear the tensile force.
Fig. 10 is an installation process to which the present truss structure is applied, and referring to fig. 8 and 9, the installation process is as follows: 1. the straight edge of the hole of the clamping plate 2 is parallel to the milling plane on the outer side of the mushroom head section of the connector 1, and the clamping plate 2 is sleeved outside the connector 1. 2. The connector 1 at the other end is inserted into the clamping plate 2, so that the end parts of the two connectors 1 are propped against the outer surfaces of the transition sections of the two connectors. 3. The catch plate 2 is moved outwardly to the necks of the two connectors 1 and rotated 90 about the axis. 4. The screw group 3 is installed to prevent the clamping plate 2 from rotating by mistake.
The utility model has high reliability, the connector sections of the two truss standard joints are propped against the outer surface of the transition section of the other connector, the axial pressure can be borne, and when the connector sections are pulled, the clamping plates act to bear the tensile force. The precision requirement is low, the installation is convenient and quick, and the installation process can be completed only by manual operation.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some or all technical features may be made without departing from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A connection form of a crane truss arm is characterized by comprising a clamping plate (2), a screw rod group (3) and a pair of connectors (1),
the connector (1) comprises a mushroom head section (11), a necking section (12), a semicircular section (13) and a transition section (14) which are sequentially connected, the necking section (12) and the semicircular section (13) are of three-dimensional structures with semicircular sections, a reinforcing rib (16) is fixed between the semicircular section (13) and the transition section (14), a section (18) is arranged on one side of the mushroom head section (11), and the reinforcing rib (16) is matched with the section (18);
the length of the long axis of the mushroom head section (11) is the same as the diameter of the section of the semicircular section (13), the length of the short axis of the mushroom head section (11) is the same as the diameter of the section of the neck section (12), and the length of the long axis of the mushroom head section (11) is larger than the diameter of the section of the neck section (12); the clamping plate (2) is of an annular structure, the short inner diameter length of the clamping plate (2) is the same as the diameter of the section of the necking section (12), the long inner diameter length of the clamping plate (2) is the same as the length of the long shaft of the mushroom head section (11), and the clamping plate (2) and the pair of connectors (1) can be fixedly connected through the screw group (3).
2. The connection form of a crane truss arm according to claim 1, characterized in that a welding section (15) is connected to the right side of the transition section (14), and a welding seam (17) is arranged between the transition section (14) and the welding section (15).
3. A form of connection of crane truss arms as claimed in claim 1, wherein the transition section (14) is of cylindrical configuration.
4. Connection form of crane truss arms according to claim 3, characterized in that the cross-sectional diameter of the transition section (14) is larger than the cross-sectional diameter of the semi-circular section (13).
5. A form of connection of a crane boom arm according to claim 1, characterized in that the clamping plate (2) and the transition section (14) are each provided with a screw hole (19), the screw group (3) being able to pass through the screw hole (19).
6. A form of connection of crane boom arms according to claim 5, characterized in that the number of screw groups (3) is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121823622.6U CN216005024U (en) | 2021-08-06 | 2021-08-06 | Connection form of crane truss arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121823622.6U CN216005024U (en) | 2021-08-06 | 2021-08-06 | Connection form of crane truss arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216005024U true CN216005024U (en) | 2022-03-11 |
Family
ID=80588126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121823622.6U Active CN216005024U (en) | 2021-08-06 | 2021-08-06 | Connection form of crane truss arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216005024U (en) |
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2021
- 2021-08-06 CN CN202121823622.6U patent/CN216005024U/en active Active
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