CN215711312U - Truss arm head and crane - Google Patents
Truss arm head and crane Download PDFInfo
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- CN215711312U CN215711312U CN202121478522.4U CN202121478522U CN215711312U CN 215711312 U CN215711312 U CN 215711312U CN 202121478522 U CN202121478522 U CN 202121478522U CN 215711312 U CN215711312 U CN 215711312U
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Abstract
The utility model provides a truss arm head and a crane, wherein the truss arm head comprises an arm head main body, a portal frame and a pulling plate; the lower part of the first end of the door frame is rotatably connected with the lower part of the second end of the arm head main body, and the second end of the door frame is suitable for being connected with the switching arm joint; the upper part of the first end of the portal is rotatably connected with the upper part of the second end of the arm head main body through a pulling plate; the connecting part of the first end of the pulling plate and the upper part of the second end of the arm head main body, the connecting part of the second end of the pulling plate and the upper part of the first end of the gantry and the connecting part of the lower part of the first end of the gantry and the lower part of the second end of the arm head main body form three rotating connecting points. In the truss arm head provided by the utility model, only three rotating connection points are formed among the pulling plate, the arm head main body and the door frame, so that the bending stress and pressure borne by the rear end of the arm head main body are reduced, the design volume of the rear end of the arm head main body can be reduced, the overall mass of the truss arm head is reduced, and the light-weight design is realized.
Description
Technical Field
The utility model relates to the technical field of cranes, in particular to a truss arm head and a crane.
Background
The crane is a multi-action crane which can vertically lift and horizontally carry heavy objects in a certain range through the suspension arm and the steel wire rope wound around the main pulley of the suspension arm, and is widely applied in the hoisting industry. The boom of a conventional crane generally includes a main boom, a transfer boom section, a truss boom head, and the like, wherein the truss boom head includes a gantry, a pulling plate, a boom head main body, and the like, a lower portion of a front end of the gantry is hinged to a lower portion of a rear end of the boom head main body, and an upper portion of the front end of the gantry is hinged to an upper portion of the rear end of the boom head main body through the pulling plate.
At present, a common truss arm head generally adopts two mutually hinged pulling plates to connect the upper part of the front end of a gantry and the upper part of the rear end of an arm head main body, so that different hoisting working conditions can be adapted by changing the hoisting angle of the truss arm head. However, due to the connection mode, the rear end of the arm head main body is required to bear not only tensile stress but also larger bending stress, and the pressure borne by the rear end of the arm head main body is increased, so that the rear end of the arm head main body is required to have larger volume and mass to meet the use requirements under different working conditions, and the production cost of the truss arm head is increased.
SUMMERY OF THE UTILITY MODEL
The utility model solves the problems that: how to simplify the structure of the truss arm head to reduce the mass and manufacturing cost of the truss arm head.
In order to solve the above problems, the present invention provides a truss arm head, including:
an arm head body having a first end and a second end;
the gantry is provided with a first end and a second end, the lower part of the first end of the gantry is rotatably connected with the lower part of the second end of the arm head main body, and the second end of the gantry is suitable for being connected with the transfer arm joint;
the pulling plate is provided with a first end and a second end, and the upper part of the first end of the gantry is rotatably connected with the upper part of the second end of the arm head main body through the pulling plate;
the connection part of the first end of the pulling plate and the upper part of the second end of the arm head main body, the connection part of the second end of the pulling plate and the upper part of the first end of the gantry and the connection part of the lower part of the first end of the gantry and the lower part of the second end of the arm head main body form three rotating connection points.
Optionally, the arm head body comprises a first chord, a second chord, a first cross member, a second cross member and a web member;
the first cross beams are connected between the first ends of the first chord members, between the first ends of the second chord members and between the first ends of the first chord members and the second chord members;
the second cross beams are connected between the second ends of the first chord members, between the second ends of the second chord members and between the first chord members and the second ends of the second chord members;
the size of the arm head main body gradually increases from the first end of the arm head main body to the second end of the arm head main body.
Optionally, one end of the pulling plate is hinged to the upper portion of the first end of the door frame, the other end of the pulling plate is hinged to the first chord, and the pulling plate and the first chord are located on the same straight line.
Optionally, the arm head main body further comprises a reinforcing structure, and the reinforcing structure is arranged on the second chord and located on one side of the second chord, which is away from the first chord.
Optionally, the upper portion of the second end of the door frame is provided with a first single lug plate structure, the upper portion of the second end of the arm head main body is provided with a single-joint fork structure, one end of the pulling plate is hinged to the first single lug plate structure through a pin shaft, and the other end of the pulling plate is hinged to the single-joint fork structure through a pin shaft.
Optionally, a second single lug plate structure is arranged at the lower part of the second end of the door frame, a double-joint fork structure is arranged at the lower part of the second end of the arm head main body, and the second single lug plate structure is hinged to the double-joint fork structure through a pin shaft.
Optionally, the truss arm head further comprises a reversing pulley block and a lifting pulley block, the reversing pulley block is arranged at the upper end of the arm head main body, and the lifting pulley block is arranged at the lower part of the first end of the arm head main body.
Optionally, the arm head main body further includes a cross bar, and both ends of the cross bar are connected with the first chord member respectively.
Optionally, the truss arm head further comprises a cushion block, and the cushion block is detachably connected with the cross rod.
In order to solve the problems, the utility model provides a crane which comprises a main crane boom, an adapting boom joint and the truss boom head, wherein one end of the adapting boom joint is connected with the main crane boom, and the other end of the adapting boom joint is connected with the second end of a gantry of the truss boom head.
Compared with the prior art, in the truss arm head provided by the utility model, only three rotation connection points are formed between the front end of the pulling plate and the upper part of the rear end of the arm head main body, between the rear end of the pulling plate and the upper part of the front end of the gantry and between the lower part of the front end of the gantry and the lower part of the rear end of the arm head main body, so that the rear end of the arm head main body and the pulling plate cannot rotate relatively, the bending stress borne by the rear end of the arm head main body is reduced, and the pressure borne by the rear end of the arm head main body is also reduced, so that the design volume of the rear end of the arm head main body can be reduced, the overall mass of the truss arm head is reduced, and the light design is realized.
Drawings
FIG. 1 is a schematic structural view of a truss arm head connected to a transition arm joint according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of a truss arm head in an embodiment of the utility model;
FIG. 3 is a schematic structural diagram of an arm head body according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another view angle of the arm head main body according to the embodiment of the present invention.
Description of reference numerals:
1. an arm head main body; 11. a first chord; 12. a second chord; 13. a first cross member; 14. a second cross member; 15. a web member; 16. a cross bar; 17. a reinforcing structure; 18. a single fork structure; 19. a double fork structure; 20. supporting a tube; 2. a gantry; 21. a first single ear plate structure; 22. a second single lug plate structure; 3. pulling a plate; 4. cushion blocks; 5. a reversing pulley block; 6. a hoisting pulley block; 7. a reversing pulley yoke; 80. transferring arm sections; 90. a steel cord.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein.
The Z-axis in the drawings indicates a vertical direction, i.e., an up-down position, and a forward direction of the Z-axis (i.e., an arrow direction of the Z-axis) indicates an upward direction and a reverse direction of the Z-axis indicates a downward direction; the X-axis in the drawing represents the horizontal direction and is designated as the left-right position, and the forward direction of the X-axis represents the left side and the reverse direction of the X-axis represents the right side; the Y-axis in the drawings is represented as a front-rear position, and a forward direction of the Y-axis represents a front side and a reverse direction of the Y-axis represents a rear side; it should also be noted that the foregoing Z-axis, Y-axis, and X-axis representations are merely intended to facilitate the description of the utility model and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the utility model.
Referring to fig. 1, an embodiment of the present invention provides a truss arm head, including an arm head main body 1, a gantry 2, and a pulling plate 3; the arm head main body 1 is provided with a first end and a second end, the gantry 2 is provided with a first end and a second end, the lower part of the first end of the gantry 2 is rotatably connected with the lower part of the second end of the arm head main body 1, and the second end of the gantry 2 is suitable for being connected with the transfer arm joint 80; the pulling plate 3 is provided with a first end and a second end, and the upper part of the first end of the gantry 2 is rotatably connected with the upper part of the second end of the arm head main body 1 through the pulling plate 3; three rotation connection points are formed at the connection part of the first end of the pulling plate 3 and the upper part of the second end of the arm head main body 1, the connection part of the second end of the pulling plate 3 and the upper part of the first end of the gantry 2, and the connection part of the lower part of the first end of the gantry 2 and the lower part of the second end of the arm head main body 1.
Wherein, the first end of the arm head body 1 refers to the end of the arm head body 1 located in the forward direction of the Y axis in FIG. 1 and is also the front end of the arm head body 1, the upper part of the first end of the arm head body 1 refers to the part of the front end of the arm head body 1 located in the forward direction of the Z axis and is also the upper part of the front end of the arm head body 1, the lower part of the first end of the arm head body 1 refers to the part of the front end of the arm head body 1 located in the reverse direction of the Z axis and is also the lower part of the front end of the arm head body 1, correspondingly, the second end of the arm head body 1 refers to the end of the arm head body 1 located in the reverse direction of the Y axis in FIG. 1 and is also the rear end of the arm head body 1, and the upper part of the second end of the arm head body 1 refers to the part of the rear end of the arm head body 1 located in the forward direction of the Z axis and is also the upper part of the rear end of the arm head body 1, and the lower part of the second end of the arm head body 1 refers to the part of the rear end of the arm head body 1 located in the reverse direction of the Z axis, which is also the lower rear end of the arm head main body 1. The representation of the gantry 2 in various positions (such as the length direction of the gantry 2, the first end and the second end of the gantry 2, the first end upper portion and the first end lower portion of the gantry 2, etc.) is the same as that of the arm head main body 1, and the description thereof is omitted. When the crane performs a hoisting operation using the truss arm head, a heavy object is suspended at the front end of the arm head main body 1, that is, the front end of the arm head main body 1 is also the end at which the arm head main body 1 is connected with the heavy object through the wire rope 90 and hoists the heavy object.
In this embodiment, the upper portion of the rear end of the arm head main body 1 is connected to the upper portion of the front end of the gantry 2 through two pulling plates 3, and the two pulling plates 3 are respectively located on the left side and the right side of the truss arm head. On the left side/right side of the truss arm head, only three rotating connection points are formed between the front end of the pulling plate 3 and the upper part of the rear end of the arm head main body 1, between the rear end of the pulling plate 3 and the upper part of the front end of the door frame 2 and between the lower part of the front end of the door frame 2 and the lower part of the rear end of the arm head main body 1, so that the rear end of the arm head main body 1 and the pulling plate 3 cannot rotate relatively, the bending stress borne by the rear end of the arm head main body 1 is reduced, and the pressure borne by the rear end of the arm head main body 1 is reduced, so that the design volume of the rear end of the arm head main body 1 can be reduced, the overall mass of the truss arm head is reduced, and the light weight design is realized; in addition, when the upper part of the rear end of the arm head main body 1 is connected with the upper part of the front end of the gantry 2 through the pulling plate 3, the truss arm head is inclined downwards by a certain angle, and the angle meets the requirement of the common wind power hoisting industry, so that the truss arm head can be used as a wind power arm head, the hoisting operation can be performed under the wind power hoisting working condition (such as a hoisting tower cylinder, a fan and the like), the angle does not need to be changed, and the installation efficiency is high.
Alternatively, as shown in fig. 2 and 3 in conjunction, the arm head main body 1 includes a first chord 11, a second chord 12, a first cross member 13, a second cross member 14, and a web member 15; wherein, a first cross beam 13 is connected between the first ends of the first chord 11, the first ends of the second chord 12 and between the first ends of the first chord 11 and the second chord 12; second cross beams 14 are connected between the second ends of the first chord members 11, between the second ends of the second chord members 12 and between the second ends of the first chord members 11 and the second chord members 12; the size of the arm head body 1 gradually increases from the first end of the arm head body 1 to the second end of the arm head body 1.
The first end of the first chord 11 refers to an end of the first chord 11 located in the positive Y-axis direction in the drawing, and is also the front end of the first chord 11, and the second end of the first chord 11 refers to an end of the first chord 11 located in the negative Y-axis direction in the drawing, and is also the rear end of the first chord 11. The first end and the second end of the second chord 12 are expressed in the same manner as the first chord 11 and will not be described in detail here. In the present embodiment, as shown in fig. 2, the arm head main body 1 includes two first chords 11, two second chords 12, four first cross members 13, four second cross members 14, and a plurality of web members 15, and these chords, web members 15, and cross members are made of high-strength structural steel and spatially constitute a quadrangular truss structure. And the size of the arm head main body 1 gradually increases from the front end of the arm head main body 1 to the rear end of the arm head main body 1, that is, in the vertical direction, the size a of the front end of the quadrangular truss structure is smaller than the size b of the rear end, that is, the height size of the front end of the quadrangular truss structure is small, and the height size of the rear end is large. Therefore, on one hand, the integral stress of the truss arm head is more reasonable, the material performance can be fully exerted, and the weight is lighter; on the other hand, the length of the arm head main body 1 can be changed by lengthening or shortening the lengths of the first chord member 11 and the second chord member 12, so that the length of the arm head main body 1 can be changed at will according to actual requirements without structural limitation, and the design requirements of truss arm heads with various specifications and lengths can be met.
Optionally, as shown in fig. 2, one end of the pulling plate 3 is hinged to the upper portion of the first end of the gantry 2, the other end of the pulling plate 3 is hinged to the first chord 11, and the pulling plate 3 and the first chord 11 are located on the same straight line.
In this embodiment, the pulling plate 3 is a rectangular tubular structure, each chord of the arm head main body 1 is a steel tube structure, the front end and the rear end of the pulling plate 3 are respectively hinged to the first chord 11 and the upper part of the front end of the gantry 2, the axis of the pulling plate 3 coincides with the axis of the first chord 11, that is, the pulling plate 3 and the first chord 11 are located on the same straight line. So, first chord member 11 mainly receives tensile stress after articulated with arm-tie 3, has reduced bending stress's influence to a great extent, has further reduced the pressure that second crossbeam 14 at arm head main part 1 rear end received for second crossbeam 14 mainly plays supporting role, has improved the stability when being connected between arm-tie 3 and the arm head main part 1.
Optionally, as shown in fig. 4, the arm head main body 1 further includes a reinforcing structure 17, and the reinforcing structure 17 is disposed on the second chord 12 and is located on a side of the second chord 12 away from the first chord 11.
When the truss arm head lifts a heavy object, the pressure applied to the second chord member 12 of the arm head main body 1 is greater than the pressure applied to the first chord member 11. Therefore, the present embodiment enhances the structural strength of the second chord 12 by providing the reinforcing structure 17, so as to improve the stability and reliability of the truss arm head during the hoisting operation.
Optionally, the reinforcing structure 17 is a channel with an open side facing the second chord 12. Thus, the reinforcing structure 17 is a channel steel, so that the structure is simple and easy to realize; moreover, compared with the case where the reinforcing structure 17 is a steel pipe, the contact area between the channel steel and the second chord 12 is larger, and the connection is firmer.
Optionally, as shown in fig. 2, a first single lug plate structure 21 is disposed on the upper portion of the second end of the gantry 2, a single fork structure 18 is disposed on the upper portion of the second end of the arm head main body 1, one end of the pulling plate 3 is hinged to the first single lug plate structure 21 through a pin, and the other end of the pulling plate 3 is hinged to the single fork structure 18 through a pin.
In this embodiment, arm-tie 3 includes two side riser boards and two connecting plates, and two side riser boards set up and have the interval about the orientation is relative, and two connecting plates set up and connect two side riser boards about the orientation is relative, and both ends all are equipped with the hinge hole around the side riser board for both ends constitute the double fork structure around arm-tie 3. The upper portion of the rear end of the arm head main body 1 is provided with a single-joint fork structure 18, a hinge hole is formed in the single-joint fork structure 18, the upper portion of the front end of the portal frame 2 is provided with a first single-lug plate structure 21, and the hinge hole is formed in the first single-lug plate structure 21. The hinge hole of 3 front ends of arm-tie and the hinge hole on the single fork structure 18 are inserted through the round pin axle and realize the front end of arm-tie 3 and articulated between the rear end upper portion of arm head main part 1, insert the hinge hole of side riser rear end and the hinge hole on the first monaural structure 21 through the round pin axle and realize the rear end of arm-tie 3 and the articulated between the front end upper portion of portal 2, simple structure, easy dismounting.
Optionally, as shown in fig. 2, a second single lug plate structure 22 is disposed at a lower portion of the second end of the gantry 2, a double fork structure 19 is disposed at a lower portion of the second end of the arm head main body 1, and the second single lug plate structure 22 is hinged to the double fork structure 19 through a pin.
Specifically, all be equipped with the hinge hole on second monaural plate structure 22 and the dual-connection fork structure 19, realize articulated between the rear end lower part of portal 2 and the rear end lower part of arm head main part 1 through inserting the hinge hole on second monaural plate structure 22 and the dual-connection fork structure 19 with the round pin axle, simple structure, easy dismounting
Optionally, as shown in fig. 2, the truss arm head further includes a reversing pulley block 5 and a hanging pulley block 6, the reversing pulley block 5 is disposed at the upper end of the arm head body 1, and the hanging pulley block 6 is disposed at the lower portion of the first end of the arm head body 1. Here, the upper end of the arm head body 1 refers to an end of the arm head body 1 located in the Z-axis forward direction in the drawing, and correspondingly, the lower end of the arm head body 1 refers to an end of the arm head body 1 located in the Z-axis reverse direction in the drawing.
In this embodiment, the reversing pulley block 5 is fixed to the upper end of the arm head body 1 by a pin shaft, and the hanging pulley block 6 is fixed to the lower portion of the front end of the arm head body 1 by a pulley shaft. Compared with the prior art, the reversing pulley block 5 is fixed at the pull plate 3, so that the reversing pulley block 5 is more stably fixed, the design structure of the pull plate 3 is simplified, and the lightweight design of the truss arm head is facilitated.
Further, a hanging pulley block 6 is fixed to the lower part of the front end of the arm head body 1 through a pulley shaft.
Optionally, the arm head main body 1 further includes a support pipe 20, one end of the support pipe 20 is connected to the lower end of the first cross member 13, and the other end of the support pipe 20 is connected to the second chord member 12. Therefore, the structural strength of the lower part of the front end of the arm head main body 1 is enhanced, and the stability of the suspension pulley block 6 fixed on the lower part of the front end of the arm head main body 1 is improved.
Optionally, as shown in fig. 2, the truss arm head further includes a reversing pulley frame 7 for mounting the reversing pulley block 5, the two cross bars 16 are respectively provided with a reversing pulley support, and the front end and the rear end of the reversing pulley frame 7 are respectively hinged to the two reversing pulley supports through a pin. Therefore, the reversing pulley block 5 is stably installed on the arm head main body 1, and the reversing pulley block is simple in structure and convenient to assemble and disassemble.
Optionally, as shown in fig. 3, the arm head main body 1 further includes a cross bar 16, and both ends of the cross bar 16 are connected to the first chords 11, respectively.
In this embodiment, the cross bar 16 is provided in plural and arranged in parallel with each other between the two first chords 11. So, through setting up horizontal pole 16, can strengthen the structural strength of arm head main part 1 on the one hand, on the other hand, horizontal pole 16 can regard as bearing structure to structure such as convenient installation switching-over assembly pulley 5 or cushion 4 (introduction later on).
Optionally, as shown in fig. 1 and 2, the truss arm head further includes a spacer block 4, and the spacer block 4 is detachably connected to the cross bar 16.
When the wire rope 90 is wound from the reversing pulley block 5 to the hanging pulley block 6, the wire rope passes through between the two cross bars 16 at the upper end of the arm head main body 1, and the cushion block 4 is detachably fixed on the cross bar 16 which is close to the wire rope 90 or is in contact with the wire rope 90 in the two cross bars 16 through a fastener. In the hoist and mount operation in-process is carried out to the hoist, wire rope 90 usually can not take place the contact with the horizontal pole 16 of arm head main part 1 when taut, and wire rope 90 is the separation attitude with cushion 4 this moment, and can take place the friction with the horizontal pole 16 of arm head main part 1 when wire rope 90 rocks or uninstalls, and wire rope 90 and cushion 4 frictional contact this moment. The cushion block 4 is arranged in the embodiment, so that the steel wire rope 90 is prevented from directly contacting the cross rod 16 of the arm head main body 1, friction is generated in the hoisting process to damage the cross rod 16, and the service life of the arm head main body 1 is prolonged.
Optionally, the cushion block 4 is made of nylon, so that the anti-friction effect can be further achieved.
The embodiment of the utility model also provides a crane, which comprises a main crane boom, a transfer boom joint 80 and the truss boom head, wherein one end of the transfer boom joint 80 is connected with the main crane boom, and the other end of the transfer boom joint 80 is connected with the second end of the gantry 2 of the truss boom head.
The beneficial effects of the crane in the embodiment with respect to the prior art are the same as the beneficial effects of the truss arm head with respect to the prior art, and are not described herein again.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A truss arm head, comprising:
an arm head body having a first end and a second end;
the gantry is provided with a first end and a second end, the lower part of the first end of the gantry is rotatably connected with the lower part of the second end of the arm head main body, and the second end of the gantry is suitable for being connected with the transfer arm joint;
the pulling plate is provided with a first end and a second end, and the upper part of the first end of the gantry is rotatably connected with the upper part of the second end of the arm head main body through the pulling plate;
the connection part of the first end of the pulling plate and the upper part of the second end of the arm head main body, the connection part of the second end of the pulling plate and the upper part of the first end of the gantry and the connection part of the lower part of the first end of the gantry and the lower part of the second end of the arm head main body form three rotating connection points.
2. The truss arm head of claim 1 wherein the arm head body comprises a first chord, a second chord, a first cross member, a second cross member, and a web member;
the first cross beams are connected between the first ends of the first chord members, between the first ends of the second chord members and between the first ends of the first chord members and the second chord members;
the second cross beams are connected between the second ends of the first chord members, between the second ends of the second chord members and between the first chord members and the second ends of the second chord members;
the size of the arm head main body gradually increases from the first end of the arm head main body to the second end of the arm head main body.
3. The truss arm head as defined in claim 2 wherein one end of said pulling plate is hinged to the upper portion of the first end of said mast, the other end of said pulling plate is hinged to said first chord, and said pulling plate and said first chord are in alignment.
4. The truss arm head of claim 2 wherein the head body further comprises a reinforcing structure disposed on the second chord on a side of the second chord facing away from the first chord.
5. The truss arm head as claimed in claim 1, wherein the second end of the gantry is provided with a first single lug plate structure, the second end of the arm head body is provided with a single fork structure, one end of the pulling plate is hinged to the first single lug plate structure through a pin, and the other end of the pulling plate is hinged to the single fork structure through a pin.
6. The truss arm head as defined in claim 1 wherein the second lower end of the mast is provided with a second single lug plate structure, the second lower end of the arm head body is provided with a double fork structure, and the second single lug plate structure is hinged to the double fork structure through a pin.
7. The truss arm head of any of claims 2-4 further comprising a reversing pulley block disposed at the upper end of the arm head body and a lifting pulley block disposed below the first end of the arm head body.
8. The truss arm head of claim 7 wherein the head body further comprises a cross bar, and wherein the cross bar is connected at each end to the first chord.
9. The truss arm head of claim 8 further comprising a spacer block, wherein the spacer block is removably attached to the cross bar.
10. A crane comprising a main boom, an adapter boom section and a truss arm head as defined in any of claims 1-9, wherein one end of the adapter boom section is connected to the main boom and the other end of the adapter boom section is connected to a second end of a gantry of the truss arm head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121478522.4U CN215711312U (en) | 2021-06-30 | 2021-06-30 | Truss arm head and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121478522.4U CN215711312U (en) | 2021-06-30 | 2021-06-30 | Truss arm head and crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215711312U true CN215711312U (en) | 2022-02-01 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121478522.4U Active CN215711312U (en) | 2021-06-30 | 2021-06-30 | Truss arm head and crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215711312U (en) |
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2021
- 2021-06-30 CN CN202121478522.4U patent/CN215711312U/en active Active
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