CN111689410B - Balance weight and crane - Google Patents
Balance weight and crane Download PDFInfo
- Publication number
- CN111689410B CN111689410B CN202010594315.9A CN202010594315A CN111689410B CN 111689410 B CN111689410 B CN 111689410B CN 202010594315 A CN202010594315 A CN 202010594315A CN 111689410 B CN111689410 B CN 111689410B
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- balancing weight
- stop
- lock catch
- weights
- balancing weights
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- 230000001174 ascending effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/72—Counterweights or supports for balancing lifting couples
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/10—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of bayonet connections
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jib Cranes (AREA)
Abstract
The invention provides a balancing weight and a crane, which relate to the technical field of engineering machinery and comprise a plurality of stackable balancing weights, wherein a detachable connecting structure is arranged at the joint of two adjacent balancing weights, and the detachable connecting structure can fix the two adjacent balancing weights in the stacking direction of the balancing weights and can limit the movement of the balancing weights in the direction vertical to the stacking direction. Utilize the detachable connection structure who sets up between two adjacent balancing weights, thereby it is fixed on its pile direction with two adjacent balancing weights, and can restrict the balancing weight and pile up ascending removal in the direction at the perpendicular to, prevent the dislocation between two adjacent balancing weights, through setting up a plurality of above-mentioned detachable connection structure along piling up the direction, can link together a plurality of balancing weights that pile up in proper order, when the hoist is when the operation in the environment of the relief that has certain slope, can effectively prevent to take place relative dislocation between a plurality of balancing weights that pile up, improve the safety of balancing weight.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a counterweight and a crane.
Background
Among the components of the engineering crane, the counterweight is a very important operation component, is hung at the tail of the rotary table, plays a role in balancing moment during hoisting operation, can prevent the crane from tipping to a certain extent, is influenced by the environment and weather, and is safe and reliable.
At present, when the balancing weight of the crane is more, the existing product is that the fastening chain penetrates through a hole in the middle of the balancing weight, the two ends of the chain are clamped by baffles, and the balancing weight is screwed up and adjusted by fastening bolts, so that the fastening chain is tensioned, and the fastening purpose is achieved.
Under the condition that the operation terrain is flat and the weather is good, the safe and stable use of the counterweight can be ensured by utilizing the chain fastening mode. But when gobi, seaside operation, for example, lift by crane fan blade, the relief has certain slope, and weather is windy again, uses probably to take place relative dislocation between the balancing weight that the chain is fixed, influences the stability of hoist, brings certain potential safety hazard to the hoist operation.
Disclosure of Invention
The invention aims to provide a balance weight and a crane, which solve the technical problems that the fixing mode of the balance weight of the existing crane has a certain gradient in the terrain, the weather is windy, relative dislocation can occur between the balance weights fixed by using chains, the stability of the crane is influenced, and certain potential safety hazards are brought to the operation of the crane.
The balancing weight provided by the invention comprises a plurality of stackable balancing weights, wherein a detachable connecting structure is arranged at the joint of two adjacent balancing weights, and the detachable connecting structure can fix the two adjacent balancing weights in the stacking direction of the balancing weights and can limit the movement of the balancing weights in the direction vertical to the stacking direction.
Furthermore, adjacent two be provided with a plurality ofly between the balancing weight can dismantle connection structure, it is a plurality of can dismantle connection structure follows the circumference setting of balancing weight.
Further, adjacent two be provided with threely between the balancing weight can dismantle connection structure, and three can dismantle connection structure is triangle-shaped and sets up.
Furthermore, the detachable connecting structure comprises a fixed lock catch, a stop block and a locking structure;
one end of the fixed lock catch is rotatably connected with one of the two adjacent counter weights; the stop block is arranged on the other balancing weight;
the fixed lock catch can rotate and is sleeved on the stop block, and the movement between the fixed lock catch and the stop block is locked through the locking structure.
Further, the fixing lock catch comprises a first connecting part, a second connecting part and a lock catch part which are mutually connected;
a first fixing plate and a second fixing plate are arranged on the balancing weight at intervals;
the first connecting portion is rotatably connected with the first fixing plate, the second connecting portion is rotatably connected with the second fixing plate, and the locking portion can rotate and is sleeved on the stop block.
Further, the fixed lock catch is integrally formed.
Further, the locking structure comprises a locking pin and a first through hole arranged on the stop block;
the lock pin can be inserted into the first through hole and used for fixing the fixed lock catch which passes through the first through hole of the stop block.
Furthermore, one end of the lock pin is provided with a stopping part, the other end of the lock pin is provided with a stopping through hole, and a stopping pin is inserted into the stopping through hole.
Furthermore, the locking structure comprises a screw rod, a nut and a second through hole arranged on the stop block;
the screw rod can be inserted into the second through hole, and the nut is connected to one end, far away from the screw head part, of the screw rod and used for stopping the movement of the fixed lock catch matched with the stop block.
The crane provided by the invention comprises the balance weight.
The balancing weight provided by the invention comprises a plurality of stackable balancing weights, wherein a detachable connecting structure is arranged at the joint of two adjacent balancing weights, and the detachable connecting structure can fix the two adjacent balancing weights in the stacking direction of the balancing weights and can limit the movement of the balancing weights in the direction vertical to the stacking direction.
Utilize the detachable connection structure who sets up between two adjacent balancing weights, thereby it is fixed on its pile direction with two adjacent balancing weights, and can restrict the balancing weight and pile up ascending removal in the direction at the perpendicular to, prevent the dislocation between two adjacent balancing weights, through setting up a plurality of above-mentioned detachable connection structure along piling up the direction, can link together a plurality of balancing weights of piling up in proper order, when the hoist is when the operation in the environment of the relief that has certain slope, can effectively prevent to take place relative dislocation between a plurality of balancing weights of piling up, improve the safety of balancing weight.
The crane provided by the invention comprises the balance weight, so that the crane also has the advantages of the balance weight, can avoid the dislocation of the balance weight blocks when the crane works in an uneven working environment, and improves the stability of hoisting.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a structural diagram of a counterweight according to a first embodiment of the present invention;
FIG. 2 is a side view of a counterweight according to one embodiment of the present invention;
FIG. 3 is an enlarged view of portion A of FIG. 2;
fig. 4 is a structural diagram of a stop block of a counterweight according to an embodiment of the present invention;
fig. 5 is a structural diagram of a fixing lock of a counterweight according to an embodiment of the present invention;
FIG. 6 is a block diagram of a lock pin of a counterweight according to an embodiment of the present invention;
FIG. 7 is a block diagram of a stop pin of a counterweight according to an embodiment of the present invention;
fig. 8 is a structural view of a fixing structure of a counterweight according to a second embodiment of the present invention.
Icon: 10-a first balancing weight; 20-a second balancing weight; 30-weight block three; 100-detachable connection structure; 110-fixing the lock catch; 111-a first connection; 112-a second connection; 113-a locking part; 120-a stopper; 121 — a first via; 122-a second via; 130-a locking pin; 131-a stopper portion; 132-a stop through hole; 140-a stop pin; 151-first fixing plate; 152-a second fixing plate; 161-screw rod; 162-nut.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.
Example one
As shown in fig. 1 to 7, the balancing weight provided by the present embodiment includes a plurality of balancing weights that can be stacked, a detachable connection structure 100 is disposed at a joint of two adjacent balancing weights, and the detachable connection structure 100 can fix two adjacent balancing weights in a stacking direction of the balancing weights and can limit movement of the balancing weights in a direction perpendicular to the stacking direction.
Utilize the detachable connection structure 100 who sets up between two adjacent balancing weights, thereby it is fixed on its pile direction with two adjacent balancing weights, and can restrict the balancing weight and pile up ascending removal in the direction at the perpendicular to, prevent the dislocation between two adjacent balancing weights, through setting up a plurality of above-mentioned detachable connection structure 100 along piling up the direction, can link together a plurality of balancing weights of piling up in proper order, when the hoist is when the operation in the environment of the topography that has certain slope, can effectively prevent to take place relative dislocation between a plurality of balancing weights of piling up, improve the safety of balanced heavy.
In addition, because of connecting through dismantling connection structure 100 between two adjacent balancing weights, when the weight of balanced heavy needs to be adjusted, can reduce the quantity of balancing weight through opening the dismantled connection structure 100 between two balancing weights from the top in proper order, also can increase new balancing weight at the top, and connect fixedly through dismantling connection structure 100, thereby make the easy dismounting of balanced heavy, and simultaneously, connect through dismantling connection structure 100 all the time because of other balancing weights, so can avoid it to take place relative dislocation and drop, can also improve the security of the weight in-process of adjusting balanced heavy.
Further, be provided with a plurality of detachable connection structure 100 between two adjacent balancing weights, a plurality of detachable connection structure 100 set up along the circumference of balancing weight.
Specifically, be provided with a plurality of detachable connection structure 100 between the balancing weight of adjacent two, and a plurality of detachable connection structure 100 sets up along the circumference interval of joining in marriage the piece for prevent to take place the dislocation between two balancing weights.
In this embodiment, can confirm along the number of piles up the number of piles that can dismantle connection structure 100 in the direction according to the quantity of the balancing weight that piles up, in this embodiment, a plurality of balancing weights pile up along vertical direction, and the quantity of balancing weight is three, is balancing weight one 10, balancing weight two 20 and balancing weight three 30 respectively from top to bottom, so along vertical direction, set up two-layer connection structure 100 that can dismantle to link together three balancing weight.
Further, be provided with three connection structure 100 dismantled between two adjacent balancing weights, and three connection structure 100 dismantled is triangle-shaped and sets up.
Specifically, the side direction interval of two adjacent balancing weights is provided with three connection structure 100 of dismantling, and three connection structure 100 of dismantling is triangle-shaped in the circumference of two balancing weights and arranges, prevents to take place the dislocation between two balancing weights. Namely, three detachable connecting structures 100 are arranged between the first counterweight block 10 and the second counterweight block 20, and three detachable connecting structures 100 are arranged between the second counterweight block 20 and the third counterweight block 30.
In this embodiment, the balancing weight is polygonal structure, sets up one respectively on adjacent three side and can dismantle connection structure 100 to form the triangle-shaped structure in the horizontal plane, improve the connection stability between two adjacent balancing weights.
Further, the detachable connection structure 100 includes a fixed catch 110, a stopper 120, and a locking structure.
One end of the fixed lock catch 110 is rotatably connected with one of the two adjacent counter weights; the stopper 120 is disposed on the other weight block.
The fixed lock catch 110 can rotate and is sleeved on the stopper 120, and the movement between the fixed lock catch 110 and the stopper 120 is locked through the locking structure.
Specifically, the detachable connection structure 100 includes a fixed latch 110, a stopper 120, and a locking structure, wherein one end of the fixed latch 110 may be rotatably connected to the upper counterweight block, the stopper 120 may be disposed on the lower counterweight block corresponding to the fixed latch 110, and the fixed latch 110 may be rotatable with respect to the upper counterweight block, may be rotatable to the stopper 120 and may be sleeved on the stopper 120, and then, the movement between the fixed latch 110 and the stopper 120 may be locked by the locking structure, thereby preventing the separation between the fixed latch 110 and the stopper 120.
It should be noted that, one end of the fixed lock catch 110 may also be rotatably connected to the lower counterweight block, the stop block 120 may be disposed on the upper counterweight block corresponding to the fixed lock catch 110, and when the fixed lock catch 110 rotates and is sleeved on the stop block 120, the fixed lock catch 110 and the stop block 120 are locked by the locking structure.
Because of balanced heavy includes a plurality of balancing weights that pile up along vertical direction, so need set up multilayer above-mentioned detachable connection structure 100 along vertical direction, because of all being provided with detachable connection structure 100 between two adjacent balancing weights, so detachable connection structure 100 form can also make things convenient for the staff to scramble as the foot ladder.
Further, the fixing latch 110 includes a first connecting portion 111, a second connecting portion 112, and a latch portion 113 connected to each other.
The counterweight is provided with a first fixing plate 151 and a second fixing plate 152 at intervals.
The first connecting portion 111 is rotatably connected to the first fixing plate 151, the second connecting portion 112 is rotatably connected to the second fixing plate 152, and the locking portion 113 can rotate and is sleeved on the stopper 120.
Specifically, the upper balance weight block is provided with a first fixing plate 151 and a second fixing plate 152 at intervals, the fixing lock 110 is arranged between the first fixing plate 151 and the second fixing plate 152, the first connecting portion 111 of the fixing lock 110 is rotatably connected with the first fixing plate 151, the second connecting portion 112 of the fixing lock 110 is rotatably connected with the second fixing plate 152, the lock 113 can rotate relative to the first fixing plate 151 and the second fixing plate 152, after the upper balance weight block and the lower balance weight block are installed, the lock 113 rotates towards the stop block 120 and is buckled on the stop block 120, and finally, the fixing lock is locked and fixed through the locking structure.
Preferably, the securing catch 110 is integrally formed.
It should be noted that the fixing latch 110 includes a pin and a ring latch; the middle part of the pin shaft is fixedly connected with the annular lock catch, and one end of the pin shaft forms the first connecting part 111; the other end plate of the pin shaft forms the second connecting part 112; the annular lock constitutes the lock portion 113.
The fixed lock 110 is composed of a pin and an annular lock, and the annular lock can be welded at the middle position of the pin to form a lock 113 for being sleeved on the stopper 120, one end of the pin forms a first connecting part 111 rotatably connected with the first fixing plate 151, and the other end of the pin forms a second connecting part 112 rotatably connected with the second fixing plate 152.
Further, the locking structure includes a locking pin 130 and a first through hole 121 provided on the stopper 120.
The locking pin 130 can be inserted into the first through hole 121 to fix the fixing latch 110 passing through the first through hole 121 of the stopper 120.
Specifically, the locking structure includes a locking pin 130 and a first through hole 121 disposed on the stopper 120, and after the locking portion 113 of the fixed lock 110 is fitted over the stopper 120 and passes through the first through hole 121, the locking pin 130 is inserted into the first through hole 121, so as to fix the fixed lock 110 and the stopper 120.
Further, one end of the lock pin 130 is provided with a stopper 131, the other end of the lock pin 130 is provided with a stopper through hole 132, and a stopper pin 140 is inserted into the stopper through hole 132.
Specifically, one end of the lock pin 130 is provided with a stop portion 131, the size of which is larger than that of the first through hole 121, for limiting the position of the lock pin 130, one end of the lock pin 130, which is far away from the stop portion 131, is provided with a radial stop through hole 132, after the locking portion 113 of the fixed lock catch 110 is sleeved on the stop block 120 and passes through the first through hole 121, the lock pin 130 is inserted into the first through hole 121, and in order to prevent the lock pin 130 from moving, the stop pin 140 is inserted into the stop through hole 132, thereby further improving the fixation of the fixed lock catch 110 and the stop block 120.
Example two
As shown in fig. 8, the counterweight provided in this embodiment includes a plurality of stackable counterweights, a detachable connection structure 100 is disposed at a joint of two adjacent counterweights, and the detachable connection structure 100 can fix two adjacent counterweights in a stacking direction of the counterweights and can limit the counterweights to move in a direction perpendicular to the stacking direction. The difference from the first embodiment is that, further, the locking structure includes a screw 161, a nut 162 and a second through hole 122 disposed on the stopper 120.
The screw 161 can be inserted into the second through hole 122, and the nut 162 is connected to an end of the screw 161 away from the head thereof for stopping the movement of the fixing catch 110 engaged with the stopper 120.
Specifically, after the fixing lock 110 is sleeved on the stopper 120, the screw 161 is inserted into the second through hole 122, and the fixing lock 110 and the stopper 120 are locked by the connection between the nut 162 and the screw 161, which also prevents the fixing lock 110 from being separated from the stopper 120.
The crane provided by the embodiment comprises the balance weight, so that the crane also has the advantages of the balance fixing device, can avoid dislocation between the balance weight blocks when the crane works in an uneven working environment, improves the stability of hoisting, and improves the safety of the crane in the working process.
In summary, the counterweight provided by the present invention includes a plurality of stackable counterweights, the connection between two adjacent counterweights is provided with the detachable connection structure 100, the detachable connection structure 100 can fix two adjacent counterweights in the stacking direction of the counterweights and can limit the movement of the counterweights in the direction perpendicular to the stacking direction. Utilize the detachable connection structure 100 who sets up between two adjacent balancing weights, thereby it is fixed on its pile direction with two adjacent balancing weights, and can restrict the balancing weight and pile up ascending removal in the direction at the perpendicular to, prevent the dislocation between two adjacent balancing weights, through setting up a plurality of above-mentioned detachable connection structure 100 along piling up the direction, can link together a plurality of balancing weights of piling up in proper order, when the hoist is when the operation in the environment of the topography that has certain slope, can effectively prevent to take place relative dislocation between a plurality of balancing weights of piling up, improve the safety of balanced heavy.
The crane provided by the invention comprises the balance weight, so that the crane also has the advantages of the balance weight, can avoid the dislocation of the balance weight blocks when the crane works in an uneven working environment, and improves the stability of lifting.
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 invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A balancing weight comprising a plurality of stackable weights, wherein a detachable connection structure (100) is provided at the junction of two adjacent weights, said detachable connection structure (100) being capable of fixing two adjacent weights in the stacking direction of said weights and of limiting the movement of said weights perpendicular to the stacking direction;
the plurality of detachable connecting structures (100) are arranged along the circumferential direction of the balancing weight, wherein every two of the mounting surfaces of at least three detachable connecting structures (100) are oppositely arranged in an inclined manner;
the detachable connecting structure (100) comprises a fixed lock catch (110), a stop block (120) and a locking structure;
one end of the fixed lock catch (110) is rotatably connected with one of the two adjacent counter weights; the stop block (120) is arranged on the other balancing weight;
the fixed lock catch (110) comprises an annular lock catch, the annular lock catch forms a lock catch part (113), the fixed lock catch (110) can rotate and enables the lock catch part (113) to be sleeved on the stop block (120), and the movement between the fixed lock catch (110) and the stop block (120) is locked through the locking structure.
2. Balancing weight according to claim 1, characterized in, that the stop (120) is provided with a space stop towards the side of the stationary catch (110).
3. Balancing weight according to claim 1, wherein three detachable connections (100) are provided between two adjacent weights, and wherein three detachable connections (100) are arranged in a triangular shape.
4. Balancing weight according to claim 2, wherein the stop (120) comprises a cylindrical structure provided with the clearance towards the side of the stationary catch (110).
5. Balancing weight according to claim 1, characterized in, that the fixing catch (110) comprises a first connecting part (111), a second connecting part (112) and the catch part (113) connected to each other;
a first fixing plate (151) and a second fixing plate (152) are arranged on the balancing weight at intervals;
the first connecting portion (111) is rotatably connected to the first fixing plate (151), and the second connecting portion (112) is rotatably connected to the second fixing plate (152).
6. Balancing weight according to claim 1, characterized in, that the securing catch (110) is formed in one piece.
7. Balancing weight according to claim 1, characterized in, that the locking structure comprises a locking pin (130) and a first through hole (121) provided on the stop (120);
the locking pin (130) can be inserted into the first through hole (121) and is used for fixing the fixing lock catch (110) passing through the first through hole (121) of the stop block (120).
8. Balancing weight according to claim 7, characterized in, that one end of the locking pin (130) is provided with a stop (131), the other end of the locking pin (130) is provided with a stop through hole (132), a stop pin (140) is inserted in the stop through hole (132).
9. Balancing weight according to claim 1, characterized in, that the locking structure comprises a screw (161), a nut (162) and a second through hole (122) provided on the stop (120);
the screw rod (161) can be inserted into the second through hole (122), and the nut (162) is connected to one end of the screw rod (161) far away from the head of the screw rod and used for stopping the movement of the fixed lock catch (110) matched with the stop block (120).
10. A crane comprising a counterweight according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010594315.9A CN111689410B (en) | 2020-06-24 | 2020-06-24 | Balance weight and crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010594315.9A CN111689410B (en) | 2020-06-24 | 2020-06-24 | Balance weight and crane |
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| Publication Number | Publication Date |
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| CN111689410A CN111689410A (en) | 2020-09-22 |
| CN111689410B true CN111689410B (en) | 2022-07-05 |
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| CN202010594315.9A Active CN111689410B (en) | 2020-06-24 | 2020-06-24 | Balance weight and crane |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100224583A1 (en) * | 2009-03-09 | 2010-09-09 | Mentink Trevor D | Counterweight block and assemblies for cranes |
| CN201729607U (en) * | 2009-12-04 | 2011-02-02 | 上海三一科技有限公司 | Locking apparatus for fixing multiplayer connection counterweight blocks |
| CN102229414A (en) * | 2011-06-11 | 2011-11-02 | 三一汽车起重机械有限公司 | Crane and counterweight block thereof |
| CN207157886U (en) * | 2017-08-03 | 2018-03-30 | 李春江 | A kind of blood transports portable multi-purpose medical treatment transport box |
| CN110885018A (en) * | 2019-11-28 | 2020-03-17 | 徐工集团工程机械股份有限公司建设机械分公司 | Hierarchical formula counterweight fastening device and hoist |
-
2020
- 2020-06-24 CN CN202010594315.9A patent/CN111689410B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100224583A1 (en) * | 2009-03-09 | 2010-09-09 | Mentink Trevor D | Counterweight block and assemblies for cranes |
| CN201729607U (en) * | 2009-12-04 | 2011-02-02 | 上海三一科技有限公司 | Locking apparatus for fixing multiplayer connection counterweight blocks |
| CN102229414A (en) * | 2011-06-11 | 2011-11-02 | 三一汽车起重机械有限公司 | Crane and counterweight block thereof |
| CN207157886U (en) * | 2017-08-03 | 2018-03-30 | 李春江 | A kind of blood transports portable multi-purpose medical treatment transport box |
| CN110885018A (en) * | 2019-11-28 | 2020-03-17 | 徐工集团工程机械股份有限公司建设机械分公司 | Hierarchical formula counterweight fastening device and hoist |
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| CN111689410A (en) | 2020-09-22 |
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