CN114538302A - Crane with protection mechanism for ocean engineering - Google Patents

Crane with protection mechanism for ocean engineering Download PDF

Info

Publication number
CN114538302A
CN114538302A CN202011300624.7A CN202011300624A CN114538302A CN 114538302 A CN114538302 A CN 114538302A CN 202011300624 A CN202011300624 A CN 202011300624A CN 114538302 A CN114538302 A CN 114538302A
Authority
CN
China
Prior art keywords
far away
plate
rod
crane
telescopic rod
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011300624.7A
Other languages
Chinese (zh)
Inventor
孙嘉寅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202011300624.7A priority Critical patent/CN114538302A/en
Publication of CN114538302A publication Critical patent/CN114538302A/en
Pending legal-status Critical Current

Links

Images

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
    • B66C23/18—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 specially adapted for use in particular purposes
    • B66C23/36—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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • 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
    • 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
    • B66C23/64—Jibs
    • B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
    • B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
    • B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
    • 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
    • B66C23/82—Luffing gear
    • B66C23/821—Bracing equipment for booms
    • B66C23/823—Bracing equipment acting in vertical direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0321—Travelling cranes
    • B66C2700/0357—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)

Abstract

The invention discloses a crane with a protection mechanism for ocean engineering, which comprises a crane main body, wherein the crane main body comprises a vehicle body, a suspension rod, a wire winding and unwinding box, a bolt, a first telescopic rod and a second telescopic rod, the suspension rod is arranged on the upper side of the left side of the vehicle body, the wire winding and unwinding box is arranged at one end of the suspension rod, which is far away from the vehicle body, the bolts are arranged inside the suspension rod and the wire winding and unwinding box, the dismounting and mounting protection mechanism is arranged on the upper side of the wire winding and unwinding box, a bolt plate is fixedly connected to the upper side of the wire winding and unwinding box, one end of the bolt plate, which is far away from the wire winding and unwinding box, is inserted into a first open groove, the outer side of the first open groove is arranged in the suspension rod, a fourth open groove is formed in the bolt plate, and a connecting plate is inserted into the fourth open groove. According to the invention, when the wire winding and unwinding box needs to be detected and protected, the wire winding and unwinding box is quickly disassembled and assembled, the protection convenience of the wire winding and unwinding box is improved, the service life of the wire winding and unwinding box is prolonged, and the damage to the wire winding and unwinding box caused by long-term abrasion is reduced.

Description

Crane with protection mechanism for ocean engineering
Technical Field
The invention relates to the technical field of cranes, in particular to a crane with a protection mechanism for ocean engineering.
Background
With the development of science and technology and the continuous progress of society, people probe oceans more and more deeply, the utilization of ocean resources is more and more, the construction development of ocean engineering is faster and faster, and in the ocean engineering construction, a crane is needed to carry large-scale materials, so that the existing crane for ocean engineering basically meets the requirements of people, but still has some problems.
The first problem is that: traditional crane for ocean engineering, when daily use, receive and release line box department, wearing and tearing are comparatively serious, nevertheless in order to guarantee to receive and release the connection steadiness of line box, receive and release line box and jib threaded connection usually, when overhauing the protection receiving and releasing line box, the dismouting is comparatively inconvenient.
The second problem is that: traditional hoist for ocean engineering, the telescopic link adopts hydraulic mode to promote usually, nevertheless because the hoist lifts by crane all is comparatively heavy material, the telescopic link is flexible comparatively hard, needs more pressure just can drive, extravagant more fuel.
Therefore, a crane with a protection mechanism for ocean engineering is needed to solve the above problems.
Disclosure of Invention
The invention aims to provide a crane with a protection mechanism for ocean engineering, which aims to solve the problem of inconvenient dismounting and protection of the crane in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a crane with a protection mechanism for ocean engineering comprises a crane main body, wherein the crane main body comprises a vehicle body, a hanging rod, a wire winding and unwinding box, a bolt, a first telescopic rod and a second telescopic rod, the hanging rod is arranged on the upper side of the left side of the vehicle body, the end, away from the vehicle body, of the hanging rod is provided with the wire winding and unwinding box, the bolts are arranged inside the hanging rod and the wire winding and unwinding box, the dismounting protection mechanism is arranged on the upper side of the wire winding and unwinding box and is convenient to protect, a bolt plate is fixedly connected to the upper side of the wire winding and unwinding box, one end, away from the wire winding and unwinding box, of the bolt plate is inserted into a first groove, the outer side of the first groove is arranged in the hanging rod, a fourth groove is formed in the bolt plate, a connecting plate is inserted into the fourth groove, a spring is fixedly connected to the middle of one side, away from the connecting plate, of the spring is fixedly connected to the slide rail, one side, away from the connecting plate, is fixedly connected to the hanging rod, and the connecting rod has been changeed in the one side both ends switching that the connecting plate is kept away from the bolt board, the connecting rod keeps away from one side switching of connecting plate has the slider, and the slider keeps away from one side of connecting rod and slides on the slide rail.
Preferably, automobile body left side downside is provided with first telescopic link, and the inside second fluting of having seted up of first telescopic link, the inside second telescopic link that inserts of second fluting is equipped with the second telescopic link, and the one end setting that first telescopic link was kept away from to the second telescopic link on the jib, the second telescopic link outside is provided with supplementary telescopic machanism, and is convenient for stretch out and draw back, and the second telescopic link outside has all laminated the runner, the one end that the second telescopic link was kept away from to the runner is inserted and is established in the third fluting, and the inside first telescopic link of all seting up of third fluting, the fifth fluting has been seted up to the runner inside, and the inside gag lever post that inserts of fifth fluting, the gag lever post both sides all link firmly on first telescopic link.
Preferably, the inside blotter that is provided with of fourth slot, the buffering of being convenient for, and the blotter is kept away from one side of connecting plate and is linked firmly on the bolt board, is convenient for connect.
Preferably, the spring is internally inserted with a first limiting plate for limiting conveniently, and one side of the first limiting plate, which is far away from the connecting plate, is fixedly connected to the slide rail for connecting conveniently.
Preferably, one side of the slide rail, which is far away from the suspender, is fixedly connected with a limiting block, so that the limiting is convenient, and the limiting block is arranged in an I shape, so that the limiting is convenient.
Preferably, the inside second limiting plate that all is provided with of first fluting is convenient for spacing, and the one side that the bolt board was kept away from to the second limiting plate all links firmly on the jib, is convenient for spacing.
Compared with the prior art, the invention has the beneficial effects that:
1. the crane with the protection mechanism for the ocean engineering is provided with a bolt plate, a buffer cushion, a connecting plate, a spring, a slide rail, a first limiting plate, a connecting rod, a slide block, a limiting block and a second limiting plate, when the wire winding and unwinding box needs to be protected, bolts on two sides are screwed, the wire winding and unwinding box is dismantled, after the wire winding and unwinding box is overhauled and protected, a suspender and the wire winding and unwinding box are installed through the bolts, the bolt plate is inserted into a first groove, the connecting plate is synchronously inserted into a fourth groove, the bolt plate extrudes the connecting plate, the connecting plate compresses the spring, the connecting rod and the slide block are pushed to slide on the slide rail, after the bolt plate is attached to the limiting block, the traditional crane for the ocean engineering is solved, the abrasion of the wire winding and unwinding box is serious in daily use, but in order to ensure the connection stability of the wire winding and unwinding box, the wire winding and unwinding box is generally in threaded connection with the suspender, when the wire winding and unwinding box is maintained and protected, the wire winding and unwinding box is inconvenient to disassemble and assemble, when the wire winding and unwinding box needs to be detected and protected, the wire winding and unwinding box is quickly disassembled and assembled, the protection convenience of the wire winding and unwinding box is improved, the service life of the wire winding and unwinding box is prolonged, and the damage to the wire winding and unwinding box caused by long-term abrasion is reduced;
2. this ocean engineering is with hoist that has protection machanism is provided with runner and gag lever post, when first telescopic link and second telescopic link promote telescopically through hydraulic pressure, through second telescopic link and runner laminating, it rotates under the spacing of gag lever post to drive the runner, supplementary second telescopic link is in first telescopic link, concertina movement, traditional ocean engineering is with the hoist has been solved, the telescopic link adopts hydraulic mode to promote usually, but because what the hoist hoisted all is comparatively heavy material, the telescopic link is flexible comparatively hard, it can drive to need more pressure, the problem of extravagant more fuel, when making first telescopic link and second telescopic link concertina movement, it is more smooth and easy, promote the flexible efficiency of work of first telescopic link and second telescopic link, reduce the fuel loss, save fuel cost expenditure.
Drawings
FIG. 1 is a schematic sectional elevation view of the structure of the present invention;
FIG. 2 is a schematic front view of the structure of the present invention;
FIG. 3 is an enlarged view of the structure at A in FIG. 1 according to the present invention;
fig. 4 is an enlarged view of the structure at B in fig. 1 according to the present invention.
In the figure: 100. a crane main body; 110. a vehicle body; 120. a boom; 121. a first slot; 130. a wire box is collected and placed; 140. a bolt; 150. a first telescopic rod; 151. a second slot; 152. a third slot is formed; 160. a second telescopic rod; 200. disassembling and assembling the protection mechanism; 210. a latch plate; 211. a fourth slot is formed; 220. a cushion pad; 230. a connecting plate; 240. a spring; 250. a slide rail; 260. a first limit plate; 270. a connecting rod; 280. a slider; 290. a limiting block; 2010. a second limiting plate; 300. an auxiliary telescoping mechanism; 310. a rotating wheel; 311. fifthly, slotting; 320. a limiting rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-4, an embodiment of the present invention is shown: a crane with a protection mechanism for ocean engineering comprises a crane main body 100, wherein the crane main body 100 comprises a vehicle body 110, a suspender 120, a line receiving and releasing box 130, a bolt 140, a first telescopic rod 150 and a second telescopic rod 160, the upside of the left side of the vehicle body 110 is provided with the suspender 120, one end of the suspender 120, which is far away from the vehicle body 110, is provided with the line receiving and releasing box 130, the insides of the suspender 120 and the line receiving and releasing box 130 are both provided with the bolt 140, the upside of the line receiving and releasing box 130 is provided with a dismounting protection mechanism 200 which is convenient to protect, the connection is convenient, the upside of the line receiving and releasing box 130 is fixedly connected with a bolt plate 210, one end of the bolt plate 210, which is far away from the line receiving and releasing box 130, is inserted in a first open groove 121, the outside of the first open groove 121 is opened in the suspender 120, the bolt plate 210 is internally provided with a fourth open groove 211, a connecting plate 230 is inserted in the fourth groove 211, the middle part of one side of the connecting plate 230, which is far away from the bolt plate 210, is fixedly connected with a spring 240, and the end of the spring 240 far away from the connecting plate 230 is fixedly connected with a slide rail 250, the side of the slide rail 250 far away from the connecting plate 230 is fixedly connected with the hanger rod 120, the two ends of the side of the connecting plate 230 far away from the latch plate 210 are connected with connecting rods 270 in a switching manner, the side of the connecting rods 270 far away from the connecting plate 230 is connected with a slide block 280 in a switching manner, and the side of the slide block 280 far away from the connecting rods 270 slides on the slide rail 250.
The lower side of the left side of the vehicle body 110 is provided with a first telescopic rod 150, a second slot 151 is formed in the first telescopic rod 150, a second telescopic rod 160 is inserted in the second slot 151, one end of the second telescopic rod 160, which is far away from the first telescopic rod 150, is arranged on the suspension rod 120, an auxiliary telescopic mechanism 300, which is convenient to stretch and retract, is arranged on the outer side of the second telescopic rod 160, connection is facilitated, a rotating wheel 310 is attached to the outer side of the second telescopic rod 160, one end of the rotating wheel 310, which is far away from the second telescopic rod 160, is inserted in the third slot 152, the inner part of the third slot 152 is arranged in the first telescopic rod 150, a fifth slot 311 is formed in the rotating wheel 310, a limiting rod 320 is inserted in the fifth slot 311, and two sides of the limiting rod 320 are fixedly connected to the first telescopic rod 150.
The inside blotter 220 that is provided with the buffering of being convenient for of fourth slot 211 is convenient for connect, and the one side that blotter 220 kept away from connecting plate 230 links firmly on the bolt board 210 of being convenient for connect, promotes the steadiness.
The first limiting plate 260 convenient for limiting is inserted inside the spring 240, so that stability is improved, and one side, away from the connecting plate 230, of the first limiting plate 260 is fixedly connected to the sliding rail 250 convenient for connection, so that stability is improved.
One side of the slide rail 250 away from the suspension rod 120 is fixedly connected with a limiting block 290 for limiting, so as to improve the stability, and the limiting block 290 is set to be an 'I' shape for limiting, so as to improve the stability.
The inside second limiting plate 2010 that all is provided with the spacing of being convenient for of first fluting 121 promotes the steadiness, and the one side that bolt board 210 was kept away from to second limiting plate 2010 all links firmly on the jib 120 that is convenient for spacing, promotes the steadiness.
The working principle is as follows: when the wire box 130 needs to be protected, the bolts 140 on two sides are screwed, the wire box 130 is dismantled, after the wire box 130 is overhauled and protected, the suspender 120 and the wire box 130 are installed through the bolts 140, the bolt plate 210 is inserted into the first groove 121, the connecting plate 230 is synchronously inserted into the fourth groove 211, the bolt plate 210 extrudes the connecting plate 230, the connecting plate 230 compresses the spring 240, the connecting rod 270 and the slider 280 are pushed to slide on the sliding rail 250, after the bolt plate 210 is attached to the limiting block 290, the bolt plate 140 is installed and fixed, when the first telescopic rod 150 and the second telescopic rod 160 are pushed to stretch through hydraulic pressure, the second telescopic rod 160 is attached to the rotating wheel 310 and driven to rotate under the limiting of the limiting rod 320, and the second telescopic rod 160 is assisted to rotate in the first telescopic rod 150 and stretch.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (6)

1. The utility model provides an ocean engineering is with hoist that has protection machanism, includes crane subject (100), crane subject (100) includes automobile body (110), jib (120), receive and releases line box (130), bolt (140), first telescopic link (150) and second telescopic link (160), and automobile body (110) left side upside is provided with jib (120), the one end that automobile body (110) were kept away from in jib (120) is provided with and receives and releases line box (130), and jib (120) and receive and release line box (130) inside all be provided with bolt (140), it is provided with dismouting protection machanism (200) to receive and release line box (130) upside, its characterized in that: and the upper side of the wire-releasing and wire-releasing box (130) is fixedly connected with a bolt plate (210), one end of the bolt plate (210) far away from the wire-releasing and wire-releasing box (130) is inserted in the first open slot (121), the outer side of the first open slot (121) is arranged in the hanging rod (120), a fourth open slot (211) is arranged in the latch plate (210), a connecting plate (230) is inserted in the fourth slot (211), the middle part of one side of the connecting plate (230) far away from the bolt plate (210) is fixedly connected with a spring (240), and one end of the spring (240) far away from the connecting plate (230) is fixedly connected with a slide rail (250), one side of the slide rail (250) far away from the connecting plate (230) is fixedly connected with the suspension rod (120), and the two ends of one side of the connecting plate (230) far away from the bolt plate (210) are connected with connecting rods (270) in a rotating way, a sliding block (280) is connected to one side of the connecting rod (270) far away from the connecting plate (230) in a switching way, and one side of the sliding block (280) far away from the connecting rod (270) slides on the sliding rail (250).
2. The crane with the protection mechanism for the ocean engineering according to claim 1, wherein: a first telescopic rod (150) is arranged at the lower side of the left side of the vehicle body (110), a second open slot (151) is formed in the first telescopic rod (150), a second telescopic rod (160) is inserted in the second open slot (151), and one end of the second telescopic rod (160) far away from the first telescopic rod (150) is arranged on the hanging rod (120), an auxiliary telescopic mechanism (300) is arranged at the outer side of the second telescopic rod (160), and the outer side of the second telescopic rod (160) is attached with a rotating wheel (310), one end of the rotating wheel (310) far away from the second telescopic rod (160) is inserted in the third open slot (152), the third slot (152) is internally provided in the first telescopic rod (150), the rotating wheel (310) is internally provided with a fifth slot (311), and a limiting rod (320) is inserted into the fifth open slot (311), and both sides of the limiting rod (320) are fixedly connected to the first telescopic rod (150).
3. The crane with the protection mechanism for the ocean engineering according to claim 1, wherein: a buffer pad (220) is arranged in the fourth slot (211), and one side, far away from the connecting plate (230), of the buffer pad (220) is fixedly connected to the pin plate (210).
4. The crane with the protection mechanism for the ocean engineering according to claim 1, wherein: a first limiting plate (260) is inserted into the spring (240), and one side, far away from the connecting plate (230), of the first limiting plate (260) is fixedly connected to the sliding rail (250).
5. The crane with the protection mechanism for the ocean engineering according to claim 1, wherein: one side of the slide rail (250) far away from the suspender (120) is fixedly connected with a limit block (290), and the limit block (290) is arranged in an I shape.
6. The crane with the protection mechanism for the ocean engineering according to claim 1, wherein: the inside of the first slot (121) is provided with a second limiting plate (2010), and one side, far away from the latch plate (210), of the second limiting plate (2010) is fixedly connected to the hanger rod (120).
CN202011300624.7A 2020-11-18 2020-11-18 Crane with protection mechanism for ocean engineering Pending CN114538302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011300624.7A CN114538302A (en) 2020-11-18 2020-11-18 Crane with protection mechanism for ocean engineering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011300624.7A CN114538302A (en) 2020-11-18 2020-11-18 Crane with protection mechanism for ocean engineering

Publications (1)

Publication Number Publication Date
CN114538302A true CN114538302A (en) 2022-05-27

Family

ID=81660021

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011300624.7A Pending CN114538302A (en) 2020-11-18 2020-11-18 Crane with protection mechanism for ocean engineering

Country Status (1)

Country Link
CN (1) CN114538302A (en)

Similar Documents

Publication Publication Date Title
CN201002936Y (en) Radial arrangement synchronization extension mechanism for crane
CN214692999U (en) Crane with protection mechanism for ocean engineering
CN215829436U (en) Foundation pit supporting structure
CN201087085Y (en) Trussed-beam type lengthened auxiliary elevator boom with variable cross-section
CN114538302A (en) Crane with protection mechanism for ocean engineering
CN202400264U (en) Ring beam type continuous lifting system for multifunctional wind generation set mounting ship
CN201325362Y (en) S-shaped suspension arm mechanism for road wrecker
CN111678090A (en) Multifunctional LED street lamp
CN201082850Y (en) Crawler crane main boom head
CN201850089U (en) Five-knuckle arm telescopic mechanism for crane
CN218145367U (en) Torsion-resistant hook group for crane
CN201284186Y (en) Section steel hoisting clamp
CN201932819U (en) Main beam of gantry crane
CN201553567U (en) Fork hoisting machine telescopic arm capable of expanding flexibly
CN214095485U (en) Diesel oil hydrogenation furnace convection section and collection petticoat pipe hoist and mount fixed establishment
CN201598092U (en) Wire rope sling
CN216807802U (en) Hoisting fixture for cylindrical materials
CN214786355U (en) Transmission device for suspension cable suspension bridge of ball curtain stage
CN217123492U (en) Horizontal clamp for shield segment production
CN204079304U (en) A kind of cantilever crane with digonal link
CN209455930U (en) A kind of high stability tower section suspender
CN201268561Y (en) Semiautomatic odd-even multiplying factor transform hanging hook of movable arm tower crane
CN204549898U (en) A kind of movable arm type tower machine auxiliary device
CN203486800U (en) Crane and telescopic boom thereof
CN214064173U (en) Explosion-proof elbow of lifting machine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
WD01 Invention patent application deemed withdrawn after publication
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20220527