CN114408770A - Standard knot device and tower crane - Google Patents

Standard knot device and tower crane Download PDF

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Publication number
CN114408770A
CN114408770A CN202210037599.0A CN202210037599A CN114408770A CN 114408770 A CN114408770 A CN 114408770A CN 202210037599 A CN202210037599 A CN 202210037599A CN 114408770 A CN114408770 A CN 114408770A
Authority
CN
China
Prior art keywords
main chord
female joint
standard knot
joint
pin
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
CN202210037599.0A
Other languages
Chinese (zh)
Inventor
王臻
谢江平
刘圣平
李桂芳
付英雄
喻乐康
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.)
Zoomlion Construction Crane Co Ltd
Original Assignee
Zoomlion Construction Crane Co Ltd
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 Zoomlion Construction Crane Co Ltd filed Critical Zoomlion Construction Crane Co Ltd
Priority to CN202210037599.0A priority Critical patent/CN114408770A/en
Publication of CN114408770A publication Critical patent/CN114408770A/en
Priority to PCT/CN2022/099050 priority patent/WO2023134115A1/en
Pending legal-status Critical Current

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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
    • 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
    • B66C23/16—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 with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
    • 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
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
    • 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
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/20—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using bayonet connections
    • 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
    • F16N—LUBRICATING
    • F16N1/00—Constructional modifications of parts of machines or apparatus for the purpose of lubrication

Abstract

The invention provides a standard knot device and a tower crane, the standard knot device comprises a main chord body, a male joint, a female joint and a pin shaft body, the male joint is arranged at the first end of the main chord body, a first bolt hole which is radially penetrated is arranged on the male joint, the female joint is arranged as a hollow circular tube and is connected with the second end of the main chord body, the outer diameter of the female joint is equal to the outer diameter of the main chord body, the inner diameter of the female joint is smaller than the inner diameter of the main chord body, a second bolt hole is radially penetrated and arranged on the female joint, the female joint is sleeved on the male joint of another adjacent standard knot device, the pin shaft body is arranged in the first bolt hole and the second bolt hole in a penetrating way to connect the two adjacent standard knot devices, a reinforcing plate outside the female joint is omitted, the problem of complex manufacturing process of the reinforcing plate is fundamentally solved, and the arrangement of rollers of a climbing frame is not limited, thereby facilitating the design of the climbing system.

Description

Standard knot device and tower crane
Technical Field
The invention belongs to the technical field of engineering machinery, and particularly relates to a standard knot device and a tower crane.
Background
The tower crane is a common hoisting device in construction engineering operation, and a tower body main body part of the tower crane is formed by stacking a section of standard section from bottom to top. The main chords of the circular tube standard knot on the market are mainly connected through the pin shaft, the local strength of the joint of the main chords is weakened due to the fact that the pin shaft holes are formed in the joint of the main chords, a reinforcing plate is generally arranged on the outer side of the joint of the main chords for locally reinforcing the joint of the main chords, the reinforcing plate is irregular in shape and complex in manufacturing process for matching the circular tube standard knot, the reinforcing plate is arranged to limit the design modes of the climbing frame and the roller of the climbing frame, and the development of a climbing system is restricted.
Disclosure of Invention
Aiming at the defects or shortcomings, the invention provides a standard joint device and a tower crane, and aims to solve the technical problems that the manufacturing process of a reinforcing plate is complex and the arrangement of the reinforcing plate restricts the development of a climbing system.
In order to achieve the above object, the present invention provides a standard knot device, wherein the standard knot device comprises a main chord body, a male joint, a female joint and a pin body; the main chord body is a hollow circular tube; the male joint is arranged at the first end of the main chord body and is provided with a first bolt hole which is radially communicated; the female joint is a hollow circular tube and is connected with the second end of the main chord body, the outer diameter of the female joint is equal to the outer diameter of the main chord body, the inner diameter of the female joint is smaller than the inner diameter of the main chord body, a second bolt hole is radially arranged on the female joint in a penetrating manner, and the female joint is sleeved on a male joint of another adjacent standard knot device; the pin shaft body is used for penetrating through the first pin hole and the second pin hole so as to connect two adjacent standard knot devices.
In the embodiment of the invention, the female joint comprises a welding part, a diameter-variable part and a body part which are connected in sequence, the free end of the welding part is welded and connected with the second end of the main chord body, the inner diameter of the diameter-variable part is gradually reduced from the welding part to the body part, and the body part is provided with a second plug pin hole.
In the embodiment of the invention, the outer side of the free end of the welding part is provided with the step for accommodating the second end of the main chord body, and the width of the step is equal to the wall thickness of the main chord body.
In the embodiment of the invention, the number of the pin shaft bodies for connecting the male connector and the female connector is two.
In the embodiment of the invention, a first sealing plate is arranged on the inner wall of the female joint or the inner wall of the main chord body close to the female joint.
In the embodiment of the invention, the female joint is also provided with a pin supporting box, and the pin supporting box is positioned below the second pin inserting hole.
In the embodiment of the invention, the pin body is provided with the spiral oil groove.
In the embodiment of the invention, the two ends of the pin body are both provided with the guide conical surfaces.
In the embodiment of the invention, the step body is arranged on the web member side of the main chord body.
In order to achieve the above object, the present invention also provides a tower crane, wherein the tower crane comprises the standard knot device according to the above.
Through the technical scheme, the standard knot device provided by the embodiment of the invention has the following beneficial effects:
when the standard joint device is used, the first end of the main chord body of the standard joint device is provided with a male joint, the second end is provided with a female joint, the female joint is arranged into a hollow round pipe, the female joint on one standard joint device can be sleeved on the male joint of the other adjacent standard joint device, two second bolt holes which are radially arranged on the female joint in a penetrating way can be aligned with the first bolt holes which are radially arranged on the male joint, so that the pin shaft body is arranged in the first bolt holes and the two second bolt holes in a penetrating way to connect the two adjacent standard joint devices, meanwhile, the outer diameter of the female joint is equal to the outer diameter of the main chord body, the inner diameter of the female joint is smaller than the inner diameter of the main chord body, the wall thickness of the female joint is larger than that of the main chord body, the reinforcing effect is achieved, and the reinforcing plate outside the female joint is cancelled, the problem that the manufacturing process of the reinforcing plate is complex is fundamentally solved, and in addition, the thickening direction is in the inner side, so that the arrangement of the climbing frame and the rollers of the climbing frame is not limited, and the climbing system is favorably designed.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic diagram of a standard knot device in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of a female connector according to an embodiment of the present invention;
FIG. 3 is another schematic diagram of a standard knot device in accordance with an embodiment of the present invention;
FIG. 4 is a further schematic diagram of a standard knot device in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of the structure in the direction A-A in FIG. 4;
fig. 6 is a schematic view of the structure in the direction B-B in fig. 4.
Description of the reference numerals
1 main chord body 2 male joint
21 first bolt hole 3 female joint
31 welding part 32 reducing part
33 body 34 second plug hole
35 step 4 round pin axle body
41 spiral oil groove 42 guiding conical surface
5 first seal plate 6 support pin box
61 support plate 62 stop plate
7 step 8 diagonal web member
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
The standard node apparatus according to the present invention is described below with reference to the accompanying drawings.
As shown in fig. 1 and 2, in an embodiment of the present invention, there is provided a standard knot device, wherein the standard knot device includes:
the main chord body 1 is a hollow circular tube;
the male joint 2 is arranged at the first end of the main chord body 1, and a first bolt hole 21 which is radially communicated is formed in the male joint 2;
the female joint 3 is a hollow circular tube and is connected with the second end of the main chord body 1, the outer diameter of the female joint 3 is equal to the outer diameter of the main chord body 1, the inner diameter of the female joint 3 is smaller than the inner diameter of the main chord body 1, a second bolt hole 34 is radially arranged on the female joint 3 in a penetrating mode, and the female joint 3 is sleeved on the male joint 2 of another adjacent standard knot device; and
and the pin shaft body 4 is used for penetrating through the first pin hole 21 and the second pin hole 34 to connect two adjacent standard knot devices.
When the standard knot device is used, the first end of the main chord body 1 of the standard knot device is provided with the male joint 2, the second end is provided with the female joint 3, because the female joint 3 is a hollow round pipe, the female joint 3 on one standard knot device can be sleeved on the male joint 2 of the other adjacent standard knot device, and the second bolt hole 34 radially penetrating through the female joint 3 can be aligned with the first bolt hole 21 radially penetrating through the male joint 2, so that the pin shaft body 4 is penetrated through the first bolt hole 21 and the second bolt hole 34 to connect the two adjacent standard knot devices, meanwhile, because the outer diameter of the female joint 3 is equal to the outer diameter of the main chord body 1, the inner diameter of the female joint 3 is smaller than the inner diameter of the main chord, the wall thickness of the female joint 3 is larger than that of the main chord body 1, and the reinforcing effect is achieved, the reinforcing plate outside the female joint 3 is eliminated, so that the problem of complex manufacturing process of the reinforcing plate is fundamentally solved, and the thickening direction is in the inner side, so that the arrangement of the climbing frame and the roller of the climbing frame is not limited, and the climbing system is favorably designed.
It should be noted that, since the female connector 3 configured as a hollow circular tube can be sleeved on the male connector 2, that is, the outer diameter of the male connector 2 should be smaller than the inner diameter of the female connector 3, and the portion of the male connector 2 where the first pin hole 21 is formed may be configured as a cylindrical solid body. Specifically, the male joint 2 may include a second sealing plate welded to the first end of the main chord body 1 and used for sealing the main chord body 1 configured as a hollow circular tube, and a joint post disposed on the second sealing plate, the joint post may be configured as a cylindrical solid body and the outer diameter is set to be smaller than the inner diameter of the female joint 3, and a first plug pin hole 21 radially penetrating the joint post is disposed on the joint post.
In the embodiment of the present invention, the female joint 3 includes a welding portion 31, a diameter-variable portion 32 and a body portion 33, which are connected in sequence, a free end of the welding portion 31 is welded to the second end of the main chord body 1, an inner diameter of the diameter-variable portion 32 is gradually reduced from the welding portion 31 toward the body portion 33, and the body portion 33 is provided with a second pin hole 34. Because the outer diameter of the female joint 3 is equal to the outer diameter of the main chord body 1, and the inner diameter of the welding part 31 is larger than the inner diameter of the main body, the wall thickness of the welding part 31 is smaller than that of the body part 33, so that the wall thickness difference between the main chord body 1 and the welding part 31 is smaller, and the stability after welding is facilitated.
In the embodiment of the present invention, the outer side of the free end of the welding portion 31 is formed with a step 35 for accommodating the second end of the main chord body 1, and the width of the step 35 is equal to the wall thickness of the main chord body 1. That is, the wall thickness of the welding portion 31 may be set to be greater than that of the main chord body 1, and the step 35 formed outside may be used for overlapping the second end of the main chord body 1, so as to facilitate welding positioning. Meanwhile, it should be particularly noted that before the main chord body 1 is welded to the step 35, the actual width of the step 35 may be smaller than the wall thickness of the main chord body 1, and then the welding portion 31 is welded to make the width of the step 35 equal to the wall thickness of the main chord body 1, and the inner wall of the main chord body 1 may abut against the outer wall of the welding portion 31 above the step 35 to be able to play a supporting role.
As shown in fig. 3, in the embodiment of the present invention, the number of the pin bodies 4 for connecting the male connector 2 and the female connector 3 is two, and accordingly, two first pin holes 21 may be disposed on the male connector 2 at intervals along the height direction, two second pin holes 34 penetrating radially are correspondingly disposed on the female connector 3, the two first pin holes 21 and the two second pin holes 34 are correspondingly communicated with each other one by one to form two channels, and the two pin bodies 4 are correspondingly inserted into the two channels one by one to ensure the stability of the connection.
Referring to fig. 4, in the embodiment of the present invention, a first sealing plate 5 is disposed on an inner wall of the female joint 3 or an inner wall of the main chord body 1 close to the female joint 3, and the first sealing plate 5 is used for sealing a cavity of the main chord body 1 to prevent corrosion of the cavity of the main chord. The first sealing plate 5 may be provided on the inner wall of the main chord body 1 near the box 3, or may be provided on the inner wall of the reducing portion 32 of the box 3.
Referring to fig. 4 and 5, in the embodiment of the present invention, a supporting pin box 6 is further provided on the female connector 3, and the supporting pin box 6 is located below the second latch hole 34. The pin shaft body 4 has a large mass, and when the pin shaft body 4 is driven into the first pin hole 21 and the second pin hole 34, the pin shaft body 4 can be placed on the pin supporting box 6 to be knocked, so that the labor intensity of an operator can be reduced. Specifically, the supporting pin box 6 includes a supporting plate 61 disposed right below the second pin hole 34 and two stopping plates 62 respectively disposed at two opposite ends of the supporting plate 61, so that the pin shaft body 4 can be placed on the supporting plate 61 to be knocked, and the two stopping plates 62 can play a stopping role and can guide the knocking direction.
As shown in fig. 5, in the embodiment of the present invention, the pin body 4 may be provided with a spiral oil groove 41. The spiral oil groove 41 is convenient for storing lubricating oil, so that the effects of rust prevention and convenience in installation of the pin shaft body 4 are achieved.
In the embodiment of the present invention, the pin body 4 is formed with guiding tapered surfaces 42 at both ends. Due to the arrangement of the guide conical surfaces 42, when the pin shaft body 4 is installed, the pin shaft body 4 can be knocked from two end surfaces of the pin shaft body 4, and can also be knocked from the two guide conical surfaces 42.
In addition, in order to facilitate the arrangement of the climbing frame and the roller of the climbing frame, the pin body 4 is disposed to avoid the roller, and the hole opening directions of the first pin hole 21 and the second pin hole 34 are also disposed to avoid the roller.
Referring to fig. 4 and 6 again, in the embodiment of the present invention, a tread body 7 is disposed on the web member side of the main chord body 1. The web side of the main chord body 1 is the side of the main chord body 1 on which the standard web member is arranged, i.e. the stepping body 7 and the standard web member are arranged on the same side of the main chord body 1, and the stepping body 7 can avoid the roller arrangement on the outer side, so that the stepping body 7 can remove the limitation on the roller of the climbing frame. In addition, the body 7 of will marking time sets up the web member side at main chord body 1, makes the overall dimension of whole standard festival device obtain reducing, is convenient for transport.
Referring to fig. 4 again, two groups of V-shaped web members may be disposed between two main chord bodies 1 that are adjacently disposed in a standard knot device, each group of V-shaped web members is composed of 2 oblique web members 8, that is, 4 oblique web members 8 are disposed between two main chord bodies 1.
In order to achieve the above object, the present invention also provides a tower crane, wherein the tower crane comprises the standard knot device according to the above. Since all the technical solutions of the above embodiments are adopted for the tower crane, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and are not described in detail herein.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A standard knot device, comprising:
the main chord body (1) is a hollow circular tube;
the male joint (2) is arranged at the first end of the main chord body (1), and a first bolt hole (21) which is radially penetrated is formed in the male joint (2);
the female joint (3) is arranged to be a hollow round pipe and is connected with the second end of the main chord body (1), the outer diameter of the female joint (3) is equal to the outer diameter of the main chord body (1), the inner diameter of the female joint (3) is smaller than the inner diameter of the main chord body (1), a second bolt hole (34) is formed in the female joint (3) in a radially penetrating mode, and the female joint (3) is sleeved on the male joint (2) of the other adjacent standard section device; and
and the pin shaft body (4) is used for penetrating through the first pin hole (21) and the second pin hole (34) so as to connect the two adjacent standard knot devices.
2. The standard knot device of claim 1, wherein the female joint (3) comprises a welding portion (31), a diameter-variable portion (32) and a body portion (33) which are connected in sequence, wherein a free end of the welding portion (31) is welded to a second end of the main chord body (1), an inner diameter of the diameter-variable portion (32) is gradually reduced from the welding portion (31) to the body portion (33), and the body portion (33) is provided with the second plug pin hole (34).
3. The standard knot device according to claim 2, characterized in that the outside of the free end of the welding portion (31) is formed with a step (35) for receiving the second end of the main chord body (1), the step (35) having a width equal to the wall thickness of the main chord body (1).
4. The standard knuckle arrangement according to claim 1, characterized in that the number of pin bodies (4) for connecting the male (2) and female (3) joints is two.
5. Standard knot device according to any one of claims 1 to 4, characterized in that a first sealing plate (5) is arranged on the inner wall of the female joint (3) or on the inner wall of the main chord body (1) close to the female joint (3).
6. Standard knot device according to any one of claims 1 to 4, characterized in that a cotter box (6) is further provided on the female joint (3), the cotter box (6) being located below the second cotter hole (34).
7. The standard knuckle device according to any one of claims 1 to 4, characterized in that the pin body (4) is provided with a helical oil groove (41).
8. Standard knot device according to any one of claims 1 to 4, characterized in that both ends of the pin body (4) are formed with guiding tapers (42).
9. Standard knot device according to any one of claims 1 to 4, characterized in that the web side of the main chord body (1) is provided with a tread body (7).
10. A tower crane, characterized in that it comprises a standard knot device according to any one of claims 1 to 9.
CN202210037599.0A 2022-01-13 2022-01-13 Standard knot device and tower crane Pending CN114408770A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202210037599.0A CN114408770A (en) 2022-01-13 2022-01-13 Standard knot device and tower crane
PCT/CN2022/099050 WO2023134115A1 (en) 2022-01-13 2022-06-16 Mast section device and tower crane

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210037599.0A CN114408770A (en) 2022-01-13 2022-01-13 Standard knot device and tower crane

Publications (1)

Publication Number Publication Date
CN114408770A true CN114408770A (en) 2022-04-29

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ID=81274098

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210037599.0A Pending CN114408770A (en) 2022-01-13 2022-01-13 Standard knot device and tower crane

Country Status (2)

Country Link
CN (1) CN114408770A (en)
WO (1) WO2023134115A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023134115A1 (en) * 2022-01-13 2023-07-20 中联重科建筑起重机械有限责任公司 Mast section device and tower crane

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Publication number Priority date Publication date Assignee Title
DE102006033594B3 (en) * 2006-07-18 2008-01-24 Wolffkran Gmbh Use of a socket in the connection of tower elements of a tower crane
CN201809083U (en) * 2009-12-29 2011-04-27 长沙中联重工科技发展股份有限公司 Tower crane, rod piece assembled type standard knot and rod piece used for assembled type standard knot
CN203513132U (en) * 2013-10-28 2014-04-02 中联重科股份有限公司 Tower-type crane
CN205187705U (en) * 2015-10-09 2016-04-27 徐州建机工程机械有限公司 Standard festival tenon and main chord member connection structure
CN207226868U (en) * 2017-10-10 2018-04-13 深圳市君乐实业有限公司 A kind of standard section of tower crane
CN211733671U (en) * 2019-12-31 2020-10-23 申锡机械有限公司 Bearing structure and hoisting equipment
CN212202750U (en) * 2020-02-24 2020-12-22 深圳市支点创壹科技有限公司 Novel fast lock connector
CN114408770A (en) * 2022-01-13 2022-04-29 中联重科建筑起重机械有限责任公司 Standard knot device and tower crane

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023134115A1 (en) * 2022-01-13 2023-07-20 中联重科建筑起重机械有限责任公司 Mast section device and tower crane

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