CN216863468U - Boom device and crane - Google Patents
Boom device and crane Download PDFInfo
- Publication number
- CN216863468U CN216863468U CN202220004362.8U CN202220004362U CN216863468U CN 216863468 U CN216863468 U CN 216863468U CN 202220004362 U CN202220004362 U CN 202220004362U CN 216863468 U CN216863468 U CN 216863468U
- Authority
- CN
- China
- Prior art keywords
- boom
- arm
- lifting rope
- head
- lifting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Jib Cranes (AREA)
Abstract
The utility model provides a boom device and a crane, comprising: two at least cantilever crane mechanisms that set up side by side in proper order, each cantilever crane mechanism all includes: the arm frame main body, the arm head and the suspension arm are sequentially connected; at least one connecting arm, adjacent the davit and/or the arm head pass through the connecting arm is connected. The boom device provided by the utility model comprises at least two boom mechanisms and at least one connecting arm, wherein the boom mechanisms and the at least one connecting arm are sequentially arranged side by side, each boom mechanism comprises a boom main body, a boom head and a boom which are sequentially connected, and adjacent booms and/or boom heads are connected through the connecting arm so as to finish the hoisting by utilizing a plurality of boom mechanisms simultaneously. And the whole arm support device increases the overall stability, has simple structure and low cost, is convenient to install and has higher installation precision.
Description
Technical Field
The utility model relates to the technical field of operation machinery, in particular to a boom device and a crane.
Background
The boom device is an important component of the crawler crane, and the existing boom device mainly comprises a main boom, a fixed auxiliary boom, a variable amplitude auxiliary boom, an olecranon boom, a corresponding boom combination with a super-lift and the like.
The boom devices of the crawler cranes are mostly in a single-arm single-hook form, the whole hoisting capacity is limited, a plurality of connecting parts are provided, the structure is complex, and the installation is complicated.
SUMMERY OF THE UTILITY MODEL
The utility model provides a boom device and a crane, which are used for solving the problems of limited hoisting capacity, more connecting parts, complex structure, complex installation and the like of the conventional boom device.
The utility model provides a boom device, comprising:
two at least cantilever crane mechanisms that set up side by side in proper order, each cantilever crane mechanism all includes: the arm frame main body, the arm head and the suspension arm are sequentially connected;
at least one connecting arm, adjacent the davit and/or the arm head pass through the connecting arm is connected.
In an embodiment provided by the present invention, the arm support mechanism further includes: a lifting rope, comprising: the lifting device comprises a main lifting rope and at least two auxiliary lifting ropes; one end of each auxiliary lifting rope is connected with one corresponding lifting arm, and the other end of each auxiliary lifting rope is connected with the main lifting rope.
In an embodiment provided by the utility model, the hinge surface of the suspension arm is provided with a first hinge position and a second hinge position; a third hinge joint and a fourth hinge joint are arranged on the hinge surface of the arm head;
under the condition that the arm support device is in an arm lifting state, the first hinge joint and the third hinge joint are hinged, and the second hinge joint and the fourth hinge joint are hinged;
and under the condition that the arm support device is in an arm falling state, the first hinge joint and the third hinge joint are hinged, and the second hinge joint and the fourth hinge joint are separated.
In an embodiment of the present invention, each of the arm support mechanisms further includes:
the guide pulleys are arranged on the corresponding suspension arms and/or the corresponding arm heads;
the lifting pulleys are arranged at the top ends of the corresponding arm heads; the auxiliary lifting rope sequentially penetrates through the guide pulley and the lifting pulley.
In an embodiment of the present invention, two guide pulleys are provided, which are a first guide pulley and a second guide pulley respectively;
the first guide pulley is arranged on the suspension arm, the second guide pulley is arranged on the arm head, and the auxiliary lifting rope sequentially penetrates through the second guide pulley, the first guide pulley and the lifting pulley.
In an embodiment of the present invention, each of the arm support mechanisms further includes:
and each wear-resisting plate is arranged on the suspension arm and/or the arm head along the arrangement direction of the auxiliary lifting rope in sequence.
In an embodiment of the present invention, each of the arm support mechanisms further includes:
and the pedal is arranged on the suspension arm and/or the arm head along the arrangement direction of the auxiliary lifting rope.
In an embodiment provided by the utility model, two arm support mechanisms are provided, namely a first arm support mechanism and a second arm support mechanism;
the connecting arm is connected between the boom of the first boom mechanism and the boom of the second boom mechanism.
In an embodiment provided by the utility model, the suspension arm is an olecranon arm, and an included angle between the suspension arm and the arm head which are connected with each other is 40-50 degrees.
The utility model also provides a crane which comprises a crane main body and the arm support device. The arm support device comprises: two at least cantilever crane mechanisms that set up side by side in proper order, each cantilever crane mechanism all includes: the arm frame main body, the arm head and the suspension arm are sequentially connected; at least one connecting arm, wherein the adjacent suspension arms and/or the arm heads are connected through the connecting arm; the boom main body of each boom mechanism is connected with the crane main body.
The boom device and the crane provided by the utility model comprise at least two boom mechanisms and at least one connecting arm which are sequentially arranged side by side, each boom mechanism comprises a boom main body, a boom head and a boom which are sequentially connected, and adjacent booms and/or boom heads are connected through the connecting arm so as to finish lifting by utilizing a plurality of boom mechanisms at the same time. And the whole arm support device increases the overall stability, has simple structure and low cost, is convenient to install and has higher installation precision.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic perspective view of a boom device provided in the present invention;
fig. 2 is a side view of a boom apparatus provided in the present invention;
reference numerals:
1. a boom mechanism; 11. A suspension arm; 111. A main chord tube;
112. a diagonal abdominal tube; 12. An arm head; 121. A string pipe;
122. an abdominal tube; 13. A guide pulley; 131. A first guide pulley;
132. a second guide pulley; 14. A lifting pulley; 15. A wear plate;
16. a pedal; 2. A connecting arm.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The boom device provided by the utility model is described below with reference to fig. 1 and 2.
The arm support device comprises: at least two boom mechanisms 1 and at least one connecting arm 2. The arm support mechanisms 1 are arranged side by side in sequence. Each arm support mechanism 1 includes: the boom body, the boom head 12 and the boom 11 are connected in sequence, and the included angle between the boom 11 and the boom head 12 which are connected with each other is 40-50 degrees, preferably 45 degrees, so that the boom 11 and the boom head 12 are stressed uniformly, simply and attractively and are convenient to disassemble and assemble. The boom 11 and the arm head 12 are directly connected without dismantling the arm head, and the related components can be completely assembled in a short time and with less manpower.
The boom 11 may be an olecranon arm or a breaking hammer, depending on the needs of the user. The adjacent suspension arms 11 or the arm heads 12 are connected through the connecting arm 2, or the adjacent suspension arms 11 and the arm heads 12 are connected through the connecting arm 2.
In this embodiment, two boom mechanisms 1 are provided, which are a first boom mechanism and a second boom mechanism respectively. The first arm support mechanism and the second arm support mechanism are identical in structure, are symmetrically arranged and respectively comprise an arm support main body, an arm head 12 and a suspension arm 11 which are sequentially connected. The connecting arm 2 is connected between the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism, and the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism are connected through the connecting arm 2.
When the arm support device is in an arm falling state, under the action of the connecting arm 2, the suspension arm 11 of the first arm support mechanism and the suspension arm 11 of the second arm support mechanism are both in the arm falling state. When the boom device is in a working state, the boom 11 of the first boom mechanism moves upwards under the action of the corresponding boom head 12, and at the same time, the boom 11 of the second boom mechanism moves upwards under the action of the corresponding boom head 12, due to the action of the connecting arm 2, the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism move synchronously, and when the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism move in place, the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism are maintained in a boom-up state, and the boom can be hoisted in this state.
Similarly, when more boom mechanisms 1 are arranged in the boom device, the booms 11 and the boom heads 12 in the boom mechanisms 1 move synchronously under the action of the connecting arm 2, so that the boom mechanisms 1 can jointly complete arm falling and arm lifting to complete the suspension work.
The boom device provided by the utility model comprises at least two boom mechanisms and at least one connecting arm, wherein the boom mechanisms and the at least one connecting arm are sequentially arranged side by side, each boom mechanism comprises a boom main body, a boom head and a boom which are sequentially connected, and adjacent booms and/or boom heads are connected through the connecting arm so as to finish the hoisting by utilizing a plurality of boom mechanisms simultaneously. And the whole arm support device increases the overall stability, has simple structure and low cost, is convenient to install and has higher installation precision.
Based on the above embodiment, as shown in fig. 1 and fig. 2, the boom device further includes: a lifting rope. The lifting rope includes: a main lifting rope and at least two auxiliary lifting ropes. One end of each auxiliary lifting rope is connected with a corresponding lifting arm 11, and the other end of each auxiliary lifting rope is connected with the main lifting rope. The bottom of the main lifting rope is provided with a lifting hook for lifting. The top end of the main lifting rope is simultaneously connected with all the auxiliary lifting ropes.
Specifically, the hoist rope includes: the lifting device comprises a main lifting rope, a first auxiliary lifting rope and a second auxiliary lifting rope. One ends of the first auxiliary lifting rope and the second auxiliary lifting rope are connected with the main lifting rope, the other end of the first auxiliary lifting rope is connected with the lifting arm 11 of the first arm support mechanism, and the other end of the second auxiliary lifting rope is connected with the lifting arm 11 of the second arm support mechanism.
When the boom device is in the working state, the boom 11 of the first boom mechanism moves upward under the action of the corresponding boom head 12, and at the same time, the boom 11 of the second boom mechanism moves upward under the action of the corresponding boom head 12, due to the action of the connecting arm 2, the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism move synchronously, and when the boom devices move to the right position, the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism are maintained in the boom-up state. Under the state, the first auxiliary lifting rope and the second auxiliary lifting rope can be lifted simultaneously, and the main lifting rope can finish lifting work under the action of the first auxiliary lifting rope and the second auxiliary lifting rope, namely the main lifting rope and the auxiliary lifting rope can be used for finishing the lifting work.
In an embodiment of the present invention, as shown in fig. 1 and fig. 2, the front and rear positions of the hinge surface of the boom 11 are respectively provided with a first hinge position and a second hinge position. The front and back positions of the hinge surface of the arm head 12 are respectively provided with a third hinge position and a fourth hinge position.
In this embodiment, a first joint and a second joint are provided on the hinged surface of the boom 11 and the boom head 12, a third joint and a fourth joint are also provided on the hinged surface of the boom head 12 and the boom 11, and the second joint is a semi-open joint.
Under the condition that the arm support device is in an arm falling state, the first hinge joint and the third hinge joint are hinged, namely, joint pin shafts of the first joint and the third joint penetrate into joint holes, and the first joint and the third joint are hinged. The joint pin shafts of the second joint and the fourth joint leave the second joint, when the joint pin shafts completely leave, the second hinge position is separated from the fourth hinge position, and the second joint is separated from the fourth joint.
Under the condition that the arm support device is in an arm lifting state, the suspension arm 11 lifts an arm under the action of the arm head 12, the first hinge joint and the third hinge joint are hinged, the joint pin shafts of the first joint and the third joint penetrate into the joint holes, and the first joint and the third joint are hinged. The joint pin shafts of the second joint and the fourth joint slowly fall into the second joint, when the joint pin shafts completely fall, the second hinge position is hinged with the fourth hinge position, and the joint pin shafts maintain a groove-entering state. In this state, the first auxiliary lifting rope and the second auxiliary lifting rope can be lifted simultaneously, and the main lifting rope can finish lifting work under the action of the first auxiliary lifting rope and the second auxiliary lifting rope.
In an embodiment provided by the present invention, as shown in fig. 1 and fig. 2, each arm support mechanism 1 further includes: a guide pulley 13 and a lifting pulley 14. The guide pulleys 13 are used for guiding the secondary suspension ropes, and the guide pulleys 13 are arranged on the corresponding suspension arm 11 or the arm head 12, or on both the suspension arm 11 and the arm head 12. A lifting pulley 14 is provided at the top end of the respective arm head 12. The power device can be a motor, and the auxiliary lifting rope sequentially penetrates through the guide pulley 13 and the lifting pulley 14. In the operation process of the power mechanism, the auxiliary lifting rope can be driven to move, and the auxiliary lifting rope completes lifting and lowering of a heavy object on the main lifting rope through the guide pulley 13 and the lifting pulley 14.
Specifically, the guide pulley 13 is provided with two, a first guide pulley 131 and a second guide pulley 132. The first guide pulley 131 is arranged on the suspension arm 11, the second guide pulley 132 is arranged on the arm head 12, the auxiliary suspension rope sequentially penetrates through the second guide pulley 132, the first guide pulley 131 and the lifting pulley 14, and the auxiliary suspension rope completes lifting and lowering of a heavy object on the main suspension rope through the second guide pulley 132, the first guide pulley 131 and the lifting pulley 14.
In this embodiment, the power mechanism corresponding to the first boom mechanism may drive the corresponding auxiliary lifting rope to move during the operation process, the power mechanism corresponding to the second boom mechanism may drive the corresponding auxiliary lifting rope to move during the operation process, and the two auxiliary lifting ropes complete the lifting and lowering of the weight on the main lifting rope through the corresponding second guide pulley 132, the first guide pulley 131, and the lifting pulley 14.
In order to avoid the wear of the auxiliary lifting rope and the boom 11 or the boom head 12, each boom mechanism 1 further comprises: and the wear plates 15 are arranged along the arrangement direction of the auxiliary lifting ropes in sequence. To avoid wear of the auxiliary hoist rope and the boom 11, wear plates 15 may be provided on the boom 11. To avoid wear of the secondary lifting line and the arm head 12, wear plates 15 may be provided on the arm head 12. To avoid wear of the lifting rope and the boom 11 and the head 12, wear plates 15 may be provided on the boom 11 and the head 12.
In addition, each arm support mechanism 1 further includes: a tread 16 for a person to climb. The pedal 16 is disposed along the direction of the secondary suspension rope, and the pedal 16 may be disposed on the boom 11 or the head 12, or on both the boom 11 and the boom 11, so as to facilitate the user to repair and adjust the secondary suspension rope.
In an embodiment provided by the present invention, as shown in fig. 1 and 2, the boom 11 includes: at least three main chords 111 and a plurality of diagonal web tubes 112 disposed between adjacent main chords 111.
In this embodiment, the boom 11 includes: four main chords 111, and a plurality of diagonal web tubes 112 disposed between adjacent main chords 111. According to design requirements, the four main chords 111 can be parallel to each other or arranged at an angle, and the oblique web pipes 112 are arranged between the adjacent main chords 111 in a crossing manner.
Accordingly, the arm head 12 includes: at least three chords 121 and a plurality of web tubes 122 disposed between adjacent chords 121. Specifically, the arm head 12 includes: four chords 121 and a web 122 disposed between adjacent chords. According to design requirements, the four chord tubes 121 can be parallel to each other or arranged at an angle, and the web tubes 122 are supported between the adjacent chord tubes 121.
The present invention also provides a crane comprising: a crane main body and a boom device. As shown in fig. 1 and 2, the boom apparatus includes: at least two boom mechanisms 1 and at least one connecting arm 2. The arm support mechanisms 1 are arranged side by side in sequence. Each arm support mechanism 1 includes: the boom body, the boom head 12 and the boom 11 are connected in sequence, and the included angle between the boom 11 and the boom head 12 which are connected with each other is 40-50 degrees, preferably 45 degrees, so that the boom 11 and the boom head 12 are stressed uniformly, simply and attractively and are convenient to disassemble and assemble. The boom 11 and the arm head 12 are directly connected without dismantling the arm head, and the related components can be completely assembled in a short time and with less manpower. The arm support main body of each arm support mechanism 1 is connected with the crane main body.
In this embodiment, two boom mechanisms 1 are provided, which are a first boom mechanism and a second boom mechanism respectively. The first arm support mechanism and the second arm support mechanism are identical in structure, are symmetrically arranged and respectively comprise an arm support main body, an arm head 12 and a suspension arm 11 which are sequentially connected. The connecting arm 2 is connected between the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism, and the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism are connected through the connecting arm 2.
When the crane is in the arm-falling state, under the action of the connecting arm 2, the suspension arm 11 of the first arm support mechanism and the suspension arm 11 of the second arm support mechanism are both in the arm-falling state. When the crane is in a working state, the boom 11 of the first boom mechanism moves upwards under the action of the corresponding boom head 12, and meanwhile, the boom 11 of the second boom mechanism moves upwards under the action of the corresponding boom head 12, due to the action of the connecting arm 2, the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism move synchronously, and after the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism move in place, the boom 11 of the first boom mechanism and the boom 11 of the second boom mechanism are maintained in a boom-up state, and the hoisting can be carried out in the state.
Similarly, when more boom mechanisms 1 are arranged in the boom device, the booms 11 and the boom heads 12 in the boom mechanisms 1 move synchronously under the action of the connecting arm 2, so that the boom mechanisms 1 can jointly complete arm falling and arm lifting to complete the suspension work.
The crane provided by the utility model is provided with the arm support device, and comprises at least two arm support mechanisms and at least one connecting arm, wherein the arm support mechanisms are sequentially arranged side by side, each arm support mechanism comprises an arm support main body, an arm head and a suspension arm which are sequentially connected, and the adjacent suspension arms and/or arm heads are connected through the connecting arm, so that the suspension load is completed by utilizing a plurality of arm support mechanisms simultaneously. And the whole arm support device increases the overall stability, has simple structure and low cost, is convenient to install and has higher installation precision.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A boom apparatus, comprising:
two at least cantilever crane mechanisms that set up side by side in proper order, each cantilever crane mechanism all includes: the arm frame main body, the arm head and the suspension arm are sequentially connected;
at least one connecting arm, adjacent the davit and/or the arm head pass through the connecting arm is connected.
2. The boom apparatus of claim 1, wherein the boom mechanism further comprises:
a lifting rope, comprising: the lifting device comprises a main lifting rope and at least two auxiliary lifting ropes; one end of each auxiliary lifting rope is connected with a corresponding lifting arm, and the other end of each auxiliary lifting rope is connected with the main lifting rope.
3. The boom device of claim 2, wherein the boom has an articulation surface with a first articulation location and a second articulation location; the hinge surface of the arm head is provided with a third hinge position and a fourth hinge position;
under the condition that the arm support device is in an arm lifting state, the first hinge joint and the third hinge joint are hinged, and the second hinge joint and the fourth hinge joint are hinged;
and under the condition that the arm support device is in an arm falling state, the first hinge joint and the third hinge joint are hinged, and the second hinge joint and the fourth hinge joint are separated.
4. The boom apparatus of claim 2, wherein each boom mechanism further comprises:
the guide pulleys are arranged on the corresponding suspension arms and/or the corresponding arm heads;
the lifting pulleys are arranged at the top ends of the corresponding arm heads; the auxiliary lifting rope sequentially penetrates through the guide pulley and the lifting pulley.
5. The boom device according to claim 4, characterized in that there are two guide pulleys, namely a first guide pulley and a first guide pulley;
the first guide pulley is arranged on the suspension arm, the first guide pulley is arranged on the arm head, and the auxiliary lifting rope sequentially penetrates through the first guide pulley, the first guide pulley and the lifting pulley.
6. The boom apparatus of claim 4, wherein each boom mechanism further comprises:
and each wear-resisting plate is arranged on the suspension arm and/or the arm head along the arrangement direction of the auxiliary lifting rope in sequence.
7. The boom apparatus of claim 4, wherein each boom mechanism further comprises:
and the pedal is arranged on the suspension arm and/or the arm head along the arrangement direction of the auxiliary lifting rope.
8. The boom device according to any of the claims 1-7, characterized in that there are two boom mechanisms, a first boom mechanism and a second boom mechanism respectively;
the connecting arm is connected between the boom of the first boom mechanism and the boom of the second boom mechanism.
9. The boom device according to any of the claims 1-7, characterized in that the boom is an olecranon boom, and the angle between the boom and the boom head connected to each other is 40-50 degrees.
10. A crane, comprising:
a crane body and a boom apparatus according to any of claims 1-9; the boom main body of each boom mechanism is connected with the crane main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220004362.8U CN216863468U (en) | 2022-01-04 | 2022-01-04 | Boom device and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220004362.8U CN216863468U (en) | 2022-01-04 | 2022-01-04 | Boom device and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216863468U true CN216863468U (en) | 2022-07-01 |
Family
ID=82150235
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220004362.8U Active CN216863468U (en) | 2022-01-04 | 2022-01-04 | Boom device and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216863468U (en) |
-
2022
- 2022-01-04 CN CN202220004362.8U patent/CN216863468U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8684197B2 (en) | Crane with boom raising assist structure | |
| CN201545635U (en) | Holding rod with double flat arms | |
| CN205387439U (en) | Mast hoisting accessory | |
| CN203728443U (en) | Combined tower crane with main and auxiliary boom structure | |
| CN103848360A (en) | Assembled tower type crane with mobile balancing weight system | |
| CN214298989U (en) | Tower crane without counter weight and capable of being turned over | |
| CN201485194U (en) | 60T walking type full-swing erecting crane | |
| CN100567129C (en) | A kind of hoisting device for loop wheel machine | |
| CN103832933A (en) | Group tower type crane with auxiliary boom | |
| CN202658902U (en) | Hoisting and distributing dual-purpose concrete distributing machine | |
| CN216863468U (en) | Boom device and crane | |
| CN101357743B (en) | Crane hook magnification-changing mechanism of movable arm variation-amplitude crane | |
| CN109650255B (en) | Hanging weight self-balancing system of swing trolley of tower crane | |
| CN214456342U (en) | Integrated super-lifting amplitude changing device for crane | |
| CN201144134Y (en) | Double herringbone hoisting derrick mast | |
| CN210655823U (en) | Lifting system and engineering machinery | |
| CN211200095U (en) | Matching structure of support leg and main beam of bridge girder erection machine | |
| CN203474321U (en) | Tower crane used for constructing and erecting electric transmission line iron towers | |
| CN217867758U (en) | Four-point hanging beam for large-scale floating crane | |
| CN201099586Y (en) | Crane lifting device | |
| CN104401888A (en) | Super lift apparatus and crane | |
| CN219507440U (en) | Steel shell lifting appliance capable of being vertically adjusted | |
| CN218579412U (en) | Installation hoisting machine tool for assembly type building construction | |
| CN214301689U (en) | Dynamic compaction device | |
| CN221027331U (en) | Tower type combined lifter for building |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |