CN2815993Y - Fully hydraulic caterpillar-belt crane - Google Patents
Fully hydraulic caterpillar-belt crane Download PDFInfo
- Publication number
- CN2815993Y CN2815993Y CN 200520082079 CN200520082079U CN2815993Y CN 2815993 Y CN2815993 Y CN 2815993Y CN 200520082079 CN200520082079 CN 200520082079 CN 200520082079 U CN200520082079 U CN 200520082079U CN 2815993 Y CN2815993 Y CN 2815993Y
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- hydraulic
- track rail
- rail assembly
- assembly
- auxiliary
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- 238000012806 monitoring device Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 210000002221 olecranon process Anatomy 0.000 claims description 3
- 238000010992 reflux Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 7
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Abstract
The utility model discloses a fully hydraulic crawler type crane. A hydraulic supporting leg which can support the crane to leave the earth surface is installed on an intermediate body of the crane. A crawler assembly can slide along an installing arm of the intermediate body. A push and pull device which can push and pull the crawler assembly to slide along the installing arm is arranged between the intermediate body and the crawler assembly, and a positioning and locking device is also arranged between the crawler assembly and the intermediate body. The self push and pull device and a hoisting system of the crane are used for realizing the functions of self disassembly and assembly of the crawler assembly. The functions of self disassembly and assembly of a counterweight and an arm frame can also be realized by making use of the self hanging system of the crane. Thus, the self disassembly and assembly of the whole machine is completely realized. The utility model has the advantages of convenient transportation, cost saving and installation time shortening.
Description
Technical field
The utility model relates to a kind of hoisting crane, relates in particular to a kind of crawler crane.
Background technology
All hydraulic caterpillar cranes is the development tendency of present world crawler crane.In decades, worldwide the development of crawler crane by mechanical type to the mechanical-hydraulic formula again to full hydraulic, prove through practice test: all hydraulic caterpillar cranes have running steadily, load-carrying ability is big, lifting altitude is high and can realize that stepless change, fine motion are in place, easy operating, from heavy and light, shift advantage such as easy accessibility.This is that electric travelling crane is incomparable.The dismounting cost of electric track tower crane is big, poor mobility, and crane capacity is poor, and it is imperative to be substituted by all-hydraulic large-scale crawler crane.
The crawler crane of prior art, its shortcoming is: 1. the product own wt is big, does not have from the dismounting function, and difficulty is installed in transportation, has prolonged construction period greatly; 2. mode of operation is few, and adaptive capacity is poor, can not satisfy different lifting requirements; 3. fluid power system falls behind, the fault rate height, and unstable properties can not adapt to the needs of current engineering construction.
Summary of the invention
Technical problem to be solved in the utility model provides all hydraulic caterpillar cranes of a kind of dismounting certainly, installation certainly, applied range, reliable operation.
For achieving the above object, the technical solution of the utility model is: all hydraulic caterpillar cranes, draw together intermediate, the both sides of intermediate are equipped with track rail assembly, gyro-rotor is installed on the intermediate, boom assembly is installed on the gyro-rotor, operator's compartment, power and hydraulic efficiency pressure system and counterweight, being equipped with on the described intermediate can be with hoisting crane support hydraulic support leg overhead, described track rail assembly can slide along the hold-down arm of intermediate, but be provided with the push-and-pull track rail assembly between described intermediate and the track rail assembly along the push-pull device at fixed that hold-down arm slides, also be provided with latching device between described track rail assembly and the intermediate.
But the push-and-pull track rail assembly that is provided with between described intermediate and the track rail assembly comprises the hydraulic cylinder that is installed on the intermediate along the push-pull device at fixed that hold-down arm slides, and an end of piston rod is hinged on the body of track rail assembly by bearing pin.
The positioning and locking device that is provided with between described track rail assembly and the intermediate comprises the body pivotally attached positioning and locking plate with track rail assembly, the positioning and locking plate is provided with some positioning and lockings hole, the fixedly ear that has the positioning and locking latch to pass the positioning and locking hole on the positioning and locking plate and fix with car body.
The hold-down arm of described track rail assembly is the rectangular rectangular shaft of cross-sectional plane, and it is the corresponding rectangular opening of hold-down arm of rectangle that the body of track rail assembly is provided with cross-sectional plane.
Described counterweight is to pass through the counterweight of the tackling system of hoisting crane self from dismounting.
The tubular type structure arm that the jib part of described boom assembly is made up of principal arm root, some middle segmentum intercalaris, principal arm head and olecranon is by the main transformer width of cloth rope of folding and unfolding realization boom assembly luffing; Realize the secondary luffing rope that the auxiliary hook weight rises and falls by folding and unfolding, realize the main hook steel rope that the main hook weight rises and falls by folding and unfolding.
Described boom assembly is tower lifting structure form, be the principal arm of stationary state when comprising work, the root of principal arm is provided with the principal arm anti-squat system, with principal arm hinged and can realize luffing auxiliary, keep auxiliary stable operation and reliable luffing mainly support, secondary support, auxiliary fore stay, auxiliary back stay, back stay tightening device; Realize the main hook steel rope that the main hook weight rises and falls by folding and unfolding; Realize the main transformer width of cloth rope of auxiliary luffing by folding and unfolding.
Described back stay tightening device comprises respectively with main and supporting and one of them pivotally attached hydraulic actuating cylinder of principal arm, with one of main support and principal arm residue pivotally attached piston rod, the rodless cavity of hydraulic actuating cylinder is connected with tank tube, the do not reflux check valve of fuel tank of the hydraulic oil that described pipeline is provided with the rodless cavity that keeps hydraulic actuating cylinder.
Also be provided with the auxiliary anti-squat system on the described boom assembly.
The control system of described all hydraulic caterpillar cranes adopts CAN SAE J1939 communications protocol, warm-up the engine unit, data acquisition unit, control unit, pump control unit, limiter of moment system and color liquid crystal monitoring device are coupled together, realize real time monitoring and control.
Owing to adopt technique scheme, being equipped with on the described intermediate can be with hoisting crane support hydraulic support leg overhead, described track rail assembly can slide along the hold-down arm of car body, but be provided with the push-and-pull track rail assembly between described intermediate and the track rail assembly along the push-pull device at fixed that hold-down arm slides, also be provided with positioning and locking device between described track rail assembly and the intermediate; Utilize the push-pull device at fixed of hoisting crane self and tackling system can realize track rail assembly from the dismounting function, utilize the tackling system of hoisting crane self also can realize counterweight and jib from the dismounting function, so realized fully complete machine from dismounting, promptly made things convenient for transportation, save cost again, shortened the set-up time.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment one;
Fig. 2 is the structural representation of the utility model embodiment one car body;
Fig. 3 is the structural representation of the utility model embodiment two;
Fig. 4 is the structural representation of the utility model embodiment two back stay tightening devices;
Fig. 5 is the hydraulic schematic diagram of the utility model embodiment two back stay tightening devices.
The specific embodiment
Embodiment one: as Fig. 1, shown in Figure 2, all hydraulic caterpillar cranes comprises intermediate 1, the both sides of intermediate 1 are equipped with track rail assembly 3, gyro-rotor 2 is installed on the intermediate, on the gyro-rotor 2 boom assembly is installed, operator's compartment 22, power and hydraulic efficiency pressure system and counterweight 23, being equipped with on the described car body 1 can be with hoisting crane support hydraulic support leg 14 overhead, described track rail assembly 3 can slide along the hold-down arm 11 of intermediate 1, but be provided with push-and-pull track rail assembly 3 between described intermediate 1 and the track rail assembly 3 along the push-pull device at fixed 12 that hold-down arm 11 slides, also be provided with latching device 13 between described track rail assembly 3 and the intermediate 1.
Described hydraulic support leg 14 is hinged on the car body 1 by bearing pin 14a and is provided with locating dowel pin 14b.
But the push-and-pull track rail assembly 3 that is provided with between described intermediate 1 and the track rail assembly 3 comprises the hydraulic cylinder 12a that is installed on the intermediate 1 along the push-pull device at fixed 12 that hold-down arm 11 slides, and the end of piston rod 12b is hinged on the body of track rail assembly 3 by bearing pin 12c.
The latching device 13 that is provided with between described track rail assembly 3 and the intermediate 1 comprises the body pivotally attached latch 13a with track rail assembly 3, latch 13a is provided with some locking hole 13b, the fixedly ear 13d that has locking latch 13c to pass the locking hole 13b on the latch 13a and fix with intermediate 1.
The hold-down arm 11 of described track rail assembly 3 is the rectangular rectangular shaft of cross-sectional plane, and it is the hold-down arm 11 corresponding rectangular openings of rectangle that the body of track rail assembly 3 is provided with cross-sectional plane.
Described counterweight 23 is to pass through the counterweight of the tackling system of hoisting crane self from dismounting.
The jib part of described boom assembly realizes the main transformer width of cloth rope 21e of boom assembly luffing by the tubular type structure arm that principal arm root 21a, some middle segmentum intercalaris 21b, principal arm head 21c and olecranon 21d form by folding and unfolding; Realize the secondary luffing rope 21f that the auxiliary hook weight rises and falls by folding and unfolding, realize the main hook steel rope 21g that the main hook weight rises and falls by folding and unfolding.
The power pack section of present embodiment adopts Germany benz OM906LA h type engine h, has passed through strict European EURO 3 waste gas rules, and is free from environmental pollution; Its full electronic control technology, by the ECU various operational factors of monitoring engine in real time, when will abnormal condition occurring, driving engine in time reports to the police, greatly reduce fault rate, can fully make things convenient for the operation of chaufeur by the button real time modifying such as parameters such as engine speeds simultaneously.
Present embodiment has adopted the IFLEX5 limiter of moment system of German PAT company, is used for mode of operation, oil-water system of dynamic monitoring vehicle etc.This system can diagnose car load under bad working environment and debug, and can will graphically show by the LCD screen of high-resolution with great visual angle such as mode of operations such as current detailed operating mode table, moment percentum, limit switch, interflow dead slow speed, engine speeds; Simultaneously cross the action of putting the dangerous direction of automatic cut-out when waiting dangerous situation, the maximized defencive function that hoisting process is provided for chaufeur super moment or winch will occurring.The IFLEX5 system can also make diagnosis when self breaks down, alert notice chaufeur guilty culprit in time.
Present embodiment adopts CAN SAE J1939 communications protocol advanced in the world, with warm-up the engine unit, data acquisition unit, control unit, pump control unit, IFLEX5 control system and color liquid crystal monitoring device couple together, only pass through the data cable of a four-core of CAN bus, just can with data transmission such as the mode of operation of engine parameter, profit state, elevator and pump and real-time moment percentums in monitoring device and controller, realize real time monitoring and control.
Hydraulic pressure and power system are car load " hearts ", and present embodiment has adopted world-renowned BOSCH-REXROTH company's limiting load adjusting and load-transducing pump, have reduced the power of driving engine greatly, and energy efficient has reduced cost.The utilization of hydraulic pilot handle and shuttle valve in addition, mechanism can realize stepless change in certain speed range, make operation easier; The inside and outside interflow technology of main control valve makes to hoist and walk and is divided into quick, normal speed and three kinds of speed of dead slow speed, makes operation safe.
Track rail assembly is as follows from installation process: after the trailer of transport crane main frame arrives hoisting crane work scene, 14 rotations of four hydraulic support legs are stretched out, prop up support cylinder, trailer drives away, and the initial composite entity of crane unloads; 21g pulls out from hoisting drum with the main hook steel rope, walks around from pulley is installed from the principal arm root, hangs up suspension hook; The trailer that transports track rail assembly is reached solution space, track rail assembly is unloaded from trailer; The operation amplitude-changing drum changes the distance between the main transformer width of cloth sound pulley, realizes the luffing of principal arm root, and the operation swing type mechanism is realized gyro-rotor 2 rotations, more than two kinds of operation may command track rail assembly positions in the horizontal direction; The operation hoisting drum, the may command track rail assembly is in the position of vertical direction; After the track frame position mixed up, the operant level oil cylinder was flexible, and with the hinge of push-pull device at fixed 12 and the respective point pin joint on the track frame, the stretching oil cylinder shrinks, and track frame was fixed to the position that needs; Gyro-rotor 2 integral body rotate to opposite side, repeat above action, realize the installation of opposite side track rail assembly.
Counterweight as follows: after track rail assembly is installed is certainly finished from installation process, counterweight is unloaded from truck, and be placed in corresponding position in order, the anti-hypsokinesis of locking principal arm is supported, and utilizes the A type to erect " A " type support between the gyro-rotor on oil cylinder and the hoisting crane, removes the stop pin on " A " type support, " A " type support is become to make the lifting arm that luffing moves, can sling be positioned at the hoisting crane afterbody counterweight to the installation site, carry out necessary fasteningly, can finish the installation of counterweight.
The installation principle certainly that principle and above-mentioned track rail assembly are installed certainly of jib is basic identical, all is the luffing that utilizes hoisting crane principal arm root, and the operation swing type mechanism lifts by crane assembling successively with each assembly of jib, can finish the installation of jib part.
Embodiment two: as Fig. 3, Fig. 4, shown in Figure 5, its structure and embodiment one are basic identical, its difference is the version of boom assembly, described boom assembly is tower lifting structure form, the root that is principal arm 24a, the principal arm 24a of stationary state when comprising work is provided with principal arm anti-squat system 24a1, and is hinged and can realize auxiliary 24b, the main 24c of support that keeps auxiliary 24b stable operation and reliable luffing, secondary 24d, auxiliary fore stay 24e, auxiliary back stay 24f, the back stay tightening device 24g of supporting of luffing with principal arm 24a; Realize the main hook steel rope 24h that the main hook weight rises and falls by folding and unfolding; Realize the main transformer width of cloth rope 24p of auxiliary 24b luffing by folding and unfolding.
Described back stay tightening device 24g comprises respectively and the main 24c of support and one of them pivotally attached hydraulic actuating cylinder 24g1 of principal arm 24a, with main one of 24c and the principal arm 24a residue pivotally attached piston rod 24g2 that supports, the rodless cavity of hydraulic actuating cylinder 24g1 and fuel tank 24g3 pipe is connected, the do not reflux check valve 24g4 of fuel tank 24g3 of the hydraulic oil that described pipeline is provided with the rodless cavity of maintenance hydraulic actuating cylinder 24g1.
Also be provided with auxiliary anti-squat system 24b1 on the described boom assembly, the structure of this device is that an end is hinged on the push rod on the principal arm, on the correspondence position of the auxiliary 24b of hoisting crane, be provided with and hold the free-ended top of push rod nest, 24b rotates to certain angle when auxiliary, the free end of push rod enters in the nest of top, rotate to an angle, auxiliary 24b just can not continue rotation again, prevents auxiliary 24b because inertia or maloperation continue to rotate and cause auxiliary to tumble to cause the accident.
During work, principal arm is fixed, and by the luffing of secondary luffing mechanism realization auxiliary, leans on the folding and unfolding of main hook steel rope to realize rising and falling of main hook weight.
Auxiliary back stay 24f tenesmus problem is perplexing tower operating mode maximum height of lift and two performance figure of minimum radius of turning always, and back stay tightening device 24g is head it off effectively.It adopts self-priming principle, when lifting large-tonnage hoisting capacity, and oil cylinder elongation, drag-line tensioning; After the off-load, the oil of oil cylinder rodless cavity be because the effect of check valve 24g4 can not be flowed back to fuel tank, and oil cylinder keeps former length, so the state consistency when drag-line tensioning always and lifting weight.The use of tightening device has enlarged the angle that hoists of auxiliary effectively, has increased the scope of work of complete machine.
Claims (10)
1. all hydraulic caterpillar cranes, comprise intermediate (1), the both sides of intermediate (1) are equipped with track rail assembly (3), gyro-rotor (2) is installed on the intermediate, gyro-rotor is equipped with boom assembly on (2), operator's compartment (22), power and hydraulic efficiency pressure system and counterweight (23), it is characterized in that: being equipped with on the described intermediate (1) can be with hoisting crane support hydraulic support leg (14) overhead, described track rail assembly (3) can slide along the hold-down arm (11) of intermediate (1), described intermediate (1) and track rail assembly (3) but between be provided with push-and-pull track rail assembly (3) along the push-pull device at fixed (12) that hold-down arm (11) slides, also be provided with positioning and locking device (13) between described track rail assembly (3) and the intermediate (1).
2. all hydraulic caterpillar cranes as claimed in claim 1, it is characterized in that: described intermediate (1) and track rail assembly (3) but between the push-and-pull track rail assembly (3) that is provided with comprise the hydraulic cylinder (12a) that is installed on the intermediate (1) along the push-pull device at fixed (12) that hold-down arm (11) slides, an end of piston rod (12b) is hinged on the body of track rail assembly (3) by bearing pin (12c).
3. all hydraulic caterpillar cranes as claimed in claim 1, it is characterized in that: the positioning and locking device (13) that is provided with between described track rail assembly (3) and the intermediate (1) comprises the body pivotally attached positioning and locking plate (13a) with track rail assembly (3), positioning and locking plate (13a) is provided with some positioning and lockings hole (13b), the fixedly ear (13d) that has positioning and locking latch (13c) to pass the positioning and locking hole (13b) on the positioning and locking plate (13a) and fix with intermediate (1).
4. all hydraulic caterpillar cranes as claimed in claim 1, it is characterized in that: the hold-down arm (11) of described intermediate (1) is for the rectangular rectangular shaft of cross-sectional plane, the body of track rail assembly (3) be provided with cross-sectional plane be rectangle with the corresponding rectangular opening of hold-down arm (11).
5. all hydraulic caterpillar cranes as claimed in claim 1 is characterized in that: described counterweight (23) is for passing through the counterweight of the tackling system of hoisting crane self from dismounting.
6. all hydraulic caterpillar cranes as claimed in claim 1, it is characterized in that: the tubular type structure arm that the jib part of described boom assembly is made up of principal arm root (21a), some middle segmentum intercalaris (21b), principal arm head (21c) and olecranon (21d), by the main transformer width of cloth rope (21e) of folding and unfolding realization boom assembly luffing; Realize the secondary luffing rope (21f) that the auxiliary hook weight rises and falls by folding and unfolding, realize the main hook steel rope (21g) that the main hook weight rises and falls by folding and unfolding.
7. all hydraulic caterpillar cranes as claimed in claim 1, it is characterized in that: described boom assembly is tower lifting structure form, be the principal arm (24a) of stationary state when comprising work, the root of principal arm (24a) is provided with principal arm anti-squat system (24a1), with principal arm (24a) hinged and can realize luffing auxiliary (24b), keep main (24c), secondary (24d), auxiliary fore stay (24e), auxiliary back stay (24f), the back stay tightening device (24g) of supporting of supporting of auxiliary (24b) stable operation and reliable luffing; Realize the main hook steel rope (24h) that the main hook weight rises and falls by folding and unfolding; Realize the main transformer width of cloth rope (24p) of auxiliary (24b) luffing by folding and unfolding.
8. all hydraulic caterpillar cranes as claimed in claim 7, it is characterized in that: described back stay tightening device (24g) comprises respectively and main (24c) and one of them pivotally attached hydraulic actuating cylinder (24g1) of principal arm (24a) of supporting, with main one of (24c) and principal arm (24a) the residue pivotally attached piston rod (24g2) that supports, the rodless cavity of hydraulic actuating cylinder (24g1) and fuel tank (24g3) pipe is connected, the do not reflux check valve (24g4) of fuel tank (24g3) of the hydraulic oil that described pipeline is provided with the rodless cavity of maintenance hydraulic actuating cylinder (24g1).
9. all hydraulic caterpillar cranes as claimed in claim 7 is characterized in that: also be provided with auxiliary anti-squat system (24b1) on the described boom assembly.
10. all hydraulic caterpillar cranes as claimed in claim 1, it is characterized in that: its control system adopts CAN SAE J1939 communications protocol, warm-up the engine unit, data acquisition unit, control unit, pump control unit, limiter of moment system and color liquid crystal monitoring device are coupled together, realize real time monitoring and control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520082079 CN2815993Y (en) | 2005-04-04 | 2005-04-04 | Fully hydraulic caterpillar-belt crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520082079 CN2815993Y (en) | 2005-04-04 | 2005-04-04 | Fully hydraulic caterpillar-belt crane |
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| Publication Number | Publication Date |
|---|---|
| CN2815993Y true CN2815993Y (en) | 2006-09-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520082079 Expired - Lifetime CN2815993Y (en) | 2005-04-04 | 2005-04-04 | Fully hydraulic caterpillar-belt crane |
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| Country | Link |
|---|---|
| CN (1) | CN2815993Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389057C (en) * | 2005-04-04 | 2008-05-21 | 山东鲁能光大重型机械设备有限公司 | Full hydraulic crawler crane |
| CN102180413A (en) * | 2011-05-20 | 2011-09-14 | 长沙中联重工科技发展股份有限公司 | Hoisting arm support system and hoisting apparatus including same |
| CN101898728B (en) * | 2009-05-26 | 2012-01-04 | 徐州重型机械有限公司 | Auxiliary cargo boom for crane |
| CN102502409A (en) * | 2011-11-08 | 2012-06-20 | 中国矿业大学 | Horizontal pinned hydraulic system of crawler crane counterweight |
| CN102591371A (en) * | 2012-03-07 | 2012-07-18 | 三一电气有限责任公司 | Synchronous control method and device of four-leg oil cylinder |
| CN102910216A (en) * | 2012-10-26 | 2013-02-06 | 玉柴桩工(常州)有限公司 | Self-dismountable telescopic crawler type chassis |
| CN105084234A (en) * | 2015-07-02 | 2015-11-25 | 太原重工股份有限公司 | Crane and cantilever crane anti-back-tipping device thereof |
| CN105668429A (en) * | 2016-04-05 | 2016-06-15 | 郑州科步科技有限公司 | Multifunctional overhead lifting machine |
| CN105730534A (en) * | 2014-12-12 | 2016-07-06 | 徐州重型机械有限公司 | Wheeled crane with caterpillar band structure |
| CN111747322A (en) * | 2020-07-30 | 2020-10-09 | 浙江三一装备有限公司 | Joints, jib mechanisms and cranes |
-
2005
- 2005-04-04 CN CN 200520082079 patent/CN2815993Y/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389057C (en) * | 2005-04-04 | 2008-05-21 | 山东鲁能光大重型机械设备有限公司 | Full hydraulic crawler crane |
| CN101898728B (en) * | 2009-05-26 | 2012-01-04 | 徐州重型机械有限公司 | Auxiliary cargo boom for crane |
| CN102180413A (en) * | 2011-05-20 | 2011-09-14 | 长沙中联重工科技发展股份有限公司 | Hoisting arm support system and hoisting apparatus including same |
| CN102502409A (en) * | 2011-11-08 | 2012-06-20 | 中国矿业大学 | Horizontal pinned hydraulic system of crawler crane counterweight |
| CN102502409B (en) * | 2011-11-08 | 2014-05-14 | 中国矿业大学 | Horizontal pinned hydraulic system of crawler crane counterweight |
| CN102591371A (en) * | 2012-03-07 | 2012-07-18 | 三一电气有限责任公司 | Synchronous control method and device of four-leg oil cylinder |
| CN102910216A (en) * | 2012-10-26 | 2013-02-06 | 玉柴桩工(常州)有限公司 | Self-dismountable telescopic crawler type chassis |
| CN105730534A (en) * | 2014-12-12 | 2016-07-06 | 徐州重型机械有限公司 | Wheeled crane with caterpillar band structure |
| CN105084234A (en) * | 2015-07-02 | 2015-11-25 | 太原重工股份有限公司 | Crane and cantilever crane anti-back-tipping device thereof |
| CN105668429A (en) * | 2016-04-05 | 2016-06-15 | 郑州科步科技有限公司 | Multifunctional overhead lifting machine |
| CN111747322A (en) * | 2020-07-30 | 2020-10-09 | 浙江三一装备有限公司 | Joints, jib mechanisms and cranes |
| WO2022022294A1 (en) * | 2020-07-30 | 2022-02-03 | 浙江三一装备有限公司 | Connecting joint, auxiliary arm mechanism and crane |
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