CN215666749U

CN215666749U - Mast and crane

Info

Publication number: CN215666749U
Application number: CN202121516876.3U
Authority: CN
Inventors: 陈石头; 杨威; 张玉柱; 肖春良; 宁永湾
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2022-01-28
Anticipated expiration: 2031-07-05

Abstract

The utility model relates to the field of hoisting equipment, and discloses a mast and a crane. The mast adopts a truss structure and comprises a chord member and a plurality of web members arranged on the chord member, wherein the chord member is provided with a first end and a second end which are opposite, the first end of the chord member is used for penetrating and winding a steel wire rope, and the second end of the mast is used for being hinged with a rotary table of a crane. The crane comprises the mast. The mast of the utility model adopts a truss structure, so that the weight of the mast can be effectively reduced, a crane can jack the mast by adopting a smaller jacking mechanism, the cylinder diameter of the jacking mechanism is reduced, the cost is reduced, and the installation and the transportation of the jacking mechanism are convenient.

Description

Mast and crane

Technical Field

The utility model relates to the field of hoisting equipment, in particular to a mast and a crane.

Background

With the development of the wind power market, the requirement on the lifting performance of lifting equipment is higher and higher, and the lifting capacity of the crawler crane under the standard wind power working condition needs to be increased as much as possible. In order to meet the requirements of arm lifting and hoisting under standard wind power working conditions, the mast is long enough.

The traditional mast adopts a box-shaped beam structure, and the cross section of the box-shaped beam mast is large due to the fact that the mast is long and the strength and the rigidity are large, the thickness of the plate is thick, the weight of the mast is large, the specification of a mast jacking oil cylinder of the jacking mast is large, and the mast jacking oil cylinder cannot be realized in a limited space.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem or at least partially solve the above technical problem, the present invention provides a mast and a crane.

The utility model provides a mast which adopts a truss structure and comprises a chord member and a plurality of web members arranged on the chord member, wherein the chord member is provided with a first end and a second end which are opposite, the first end of the chord member is used for penetrating and winding a steel wire rope, and the second end of the mast is used for being hinged with a rotary table of a crane.

Preferably, the mast comprises:

a first arm having opposite first and second ends;

the first joint arm is provided with a first end and a second end which are opposite, and the first end of the second joint arm is detachably connected with the first end of the first joint arm; and

the both ends of middle arm can dismantle with the first end of first festival arm and the first end of second festival arm respectively and be connected.

Preferably, the middle arm comprises a plurality of middle arm bodies which are connected in sequence, every two adjacent middle arm bodies are detachably connected, and the two middle arm bodies on the edge are detachably connected with the first end of the first section arm and the first end of the second section arm respectively.

Preferably, the both ends of middle arm are equipped with first engaging lug and second engaging lug respectively, and the first end of first festival arm is equipped with the third engaging lug with first engaging lug assorted, and the first end of second festival arm is equipped with the fourth engaging lug with second engaging lug assorted, third engaging lug and fourth engaging lug phase-match.

Preferably, the first and second pitch arms are gradually reduced in height in a direction away from the intermediate arm.

Preferably, the second end of the first arm is provided with a pulley block for passing the wire rope.

Preferably, the second end of the second knuckle arm is provided with an articulation ear mount for articulation with the turntable of the crane.

Preferably, the second end of the second knuckle arm is provided with a jacking bracket which can be pushed by a jacking mechanism of the crane.

Preferably, the shape of the jacking leg matches the shape of the second end of the second knuckle arm.

The utility model also provides a crane which comprises the mast.

Compared with the prior art, the technical scheme provided by the embodiment of the utility model has the following advantages:

the mast of the utility model adopts a truss structure, so that the weight of the mast can be effectively reduced, a crane can jack the mast by adopting a smaller jacking mechanism, the cylinder diameter of the jacking mechanism is reduced, the cost is reduced, and the installation and the transportation of the jacking mechanism are convenient.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

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 for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a front view of a mast with a first boom directly connected to a second boom according to an embodiment of the present invention;

FIG. 2 is a top view of a mast with a first boom directly connected to a second boom according to an embodiment of the present invention;

FIG. 3 is a front view of a mast with a first boom and a second boom connected by an intermediate boom according to an embodiment of the present invention;

FIG. 4 is a partial top view of a mast with a first boom and a second boom connected by an intermediate boom according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a crane under a standard working condition according to an embodiment of the utility model;

FIG. 6 is a schematic structural diagram of a crane in a super-lift condition according to an embodiment of the present invention;

fig. 7 is an enlarged view of a portion a in fig. 6.

Description of the reference numerals

10. A first joint arm; 11. a pulley block; 20. a second joint arm; 21. a hinged ear mount; 22. jacking a support; 23. a hinge position; 30. a middle arm; 40. a first connecting lug; 41. a second engaging lug; 42. a third engaging lug; 43. a fourth engaging lug; 50. a mast; 51. a chord member; 52. a web member; 60. a turntable; 61. a main arm; 62. main amplitude transformer pulling plates; 63. a jacking mechanism.

Detailed Description

In order that the above objects, features and advantages of the present invention may be more clearly understood, a solution of the present invention will be further described below. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those described herein; it is to be understood that the embodiments described in the specification are only a part of the embodiments of the present invention, and not all of them.

Referring to fig. 1 to 3, a mast provided by an embodiment of the present invention adopts a truss structure. Specifically, as shown in fig. 1 to 4, the mast 50 includes a chord 51 and a plurality of web members 52 provided on the chord 51 for improving the overall strength of the chord 51. The chord 51 has opposite first and second ends, the first end of the chord 51 being adapted to be threaded around a wire rope and the second end of the mast 50 being adapted to be articulated with the turntable of a crane.

The mast 50 of the utility model adopts a truss structure, which can effectively reduce the weight of the mast 50, so that the crane can jack up the mast 50 by adopting a smaller jacking mechanism 63, reduce the cylinder diameter of the jacking mechanism 63, reduce the cost, optimize the space of the rotary table 60, avoid the interference of the jacking mechanism 63 and the rotary table 60 or the winch, and in addition, facilitate the installation and the transportation of the jacking mechanism 63.

In addition, under the super-lift operating mode, longer mast can interfere with super-lift counter weight thrust unit, need shorten its length, just can satisfy the user demand, but the transform that box girder mast realized length is very difficult. To this end, as shown in fig. 1 to 4, a mast 50 according to an embodiment of the present invention includes a first arm 10, a second arm 20, and an intermediate arm 30.

The first jointed arm 10 has opposite first and second ends. The second arm segment 20 has opposite first and second ends, and the first end of the second arm segment 20 is detachably connected to the first end of the first arm segment 10. Both ends of the intermediate arm 30 are detachably connected to the first end of the first arm 10 and the first end of the second arm 20, respectively. The first end of the first knuckle arm 10 refers to an end of the first knuckle arm 10 connected to the middle arm 30, the other end of the first knuckle arm 10 opposite to the first end is a second end of the first knuckle arm 10, and the second end of the first knuckle arm 10 is used for being connected to a hoisting cable. Specifically, the second end of the first arm 10 is provided with a pulley block 11 for passing a wire rope.

The first end of the second knuckle arm 20 refers to the end of the second knuckle arm 20 connected to the middle arm 30, and the other end of the second knuckle arm 20 opposite to the first end is the second end of the second knuckle arm 20, and the second end of the second knuckle arm 20 is hinged to the turntable 60 of the crane. Specifically, the second end of the second arm 20 is provided with an articulated lug seat 21 for being articulated with the turntable 60 of the crane, and the second arm 20 rotates around the articulated lug seat 21, thereby adjusting the position of the mast 50. Referring to fig. 6 and 7, the second end of the second arm segment 20 is provided with a jacking bracket 22 for jacking by a jacking mechanism 63 of the crane, and the shape of the jacking bracket 22 matches with the shape of the second end of the second arm segment 20, so that the jacking bracket 22 can be attached to the second end of the second arm segment 20, and the jacking force is ensured to be completely transmitted to the second arm segment 20 through the jacking bracket 22, and accordingly, the jacking bracket 22 should be provided with a hinge position 23 for being hinged to a telescopic rod of the jacking mechanism 63, which is convenient for the connection between the jacking bracket 22 and the jacking mechanism 63, wherein the jacking bracket 22 and the jacking mechanism 63 constitute a mast jacking mechanism. Preferably, the lifting mechanism 63 is an oil cylinder, and when the lifting mechanism 63 is an oil cylinder, the telescopic rod is a piston rod.

According to the utility model, the overall length of the mast 50 is changed by dismounting or mounting the middle arm 30, so that the mast 50 can adapt to different working conditions, and under the super-lift working condition, the middle arm 30 is dismounted, so that the first section arm 10 is directly connected with the second section arm 20, further the length of the mast 50 is reduced, and the mast 50 is not interfered with a super-lift counterweight thrust mechanism; under the standard working condition, the first knuckle arm 10 and the second knuckle arm 20 are connected through the middle arm 30, so that the length of the mast 50 is increased, the amplitude pulling plate force, the amplitude rope force and the mast 50 force are reduced, and the phenomenon that the boom cannot be lifted under the standard working condition is avoided. In some cranes, the intermediate boom 30 may not be detached under the super-lift condition, that is, the first boom 10 and the second boom 20 of the mast 50 are connected by the intermediate boom 30, and at this time, the length of the mast 50 is the same as the length of the mast 50 under the standard condition, so the length of the mast 50 under the super-lift condition should be less than or equal to the length of the mast 50 under the standard condition.

In some embodiments, the middle arm 30 includes a plurality of middle arm bodies connected in sequence, each adjacent two middle arm bodies are detachably connected, and the two middle arm bodies at the side are detachably connected to the first end of the first knuckle arm 10 and the first end of the second knuckle arm 20, respectively. In this arrangement, the length of the intermediate boom 30 can be changed by changing the number of the intermediate boom bodies connected to each other, so that the length of the mast 50 can be changed to adapt to various working conditions, and the use range of the mast 50 can be increased.

As shown in fig. 4, the middle arm 30 is provided at two ends thereof with a first engaging lug 40 and a second engaging lug 41, and the first end of the first arm 10 is provided with a third engaging lug 42 matching with the first engaging lug 40, where matching means that the first engaging lug 40 and the third engaging lug 42 can be connected by a pin when the first engaging lug 40 and the third engaging lug 42 are opposite to each other.

Specifically, first engaging lug 40 can adopt the double-deck clamping piece, and the corresponding position department of double-deck clamping piece all is equipped with the through-hole, and third engaging lug 42 is the monolithic piece, also is equipped with the through-hole on the monolithic piece, and during the installation, the monolithic piece is inserted between the double-deck clamping piece to make the position of three through-hole relative, at this moment, can pass three through-hole with the round pin axle in proper order, and then be connected first engaging lug 40 and third engaging lug 42.

Further optimally, in order to prevent the pin shaft from falling off, the first end of the pin shaft is provided with a cover plate, the second end of the pin shaft is provided with a jack along the radial direction, the second end of the pin shaft penetrates through the through hole until the cover plate contacts with the side face of the double-layer clamping piece, at the moment, the jack extends out of the other side of the double-layer clamping piece, and the position of the pin shaft can be limited by inserting a limiting rod into the jack. In addition, the third engaging lug 42 may also be a double-layer clip, and the first engaging lug 40 may be a single-layer piece, which is not limited to the specific arrangement manner, as long as the first engaging lug 40 and the second engaging lug 41 can be detachably connected.

Second festival arm 20's first end is equipped with second engaging lug 41 assorted fourth engaging lug 43, and on the same way, second engaging lug 41 can adopt double-deck clamping piece, and the corresponding position department of double-deck clamping piece all is equipped with the through-hole, fourth engaging lug 43 is the monolithic piece, also be equipped with the through-hole on the monolithic piece, during the installation, the monolithic piece is inserted between the double-deck clamping piece, and make the position of three through-hole relative, at this moment, can pass three through-hole with the round pin axle in proper order, and then be connected second engaging lug 41 and fourth engaging lug 43. Alternatively, the fourth engaging lug 43 may be provided as a double-ply clip and the second engaging lug 41 may be provided as a single-ply piece.

Third engaging lug 42 mates with fourth engaging lug 43, and as shown in fig. 1 and 2, first arm 10 and second arm 20 may be directly connected to fourth engaging lug 43 via third engaging lug 42. It should be noted that, when the third engaging lug 42 is a double-layer clip, the fourth engaging lug 43 should be a single-layer piece, and at this time, the first engaging lug 40 corresponding to the third engaging lug 42 should be a single-layer piece, and the second engaging lug 41 corresponding to the fourth engaging lug 43 should be a double-layer clip.

As shown in fig. 1, 3, 5, and 7, the first link arm 10 and the second link arm 20 are gradually reduced in height in a direction away from the intermediate arm 30. This kind of design can effectively advance the whole volume of school mast 50, and then reduce mast 50 weight, simultaneously, when mast 50 is used for the super-lift operating mode, mast 50 is rotating the in-process, avoid second festival arm 20 to scrape with super-lift device, avoid influencing the normal use of hoist, and the second end height of second festival arm 20 reduces into the axiality, in order to form articulated ear seat 21, and be convenient for the articulated shaft on the second festival arm 20 inserts in articulated ear seat 21, and then make it rotate around articulated ear seat 21.

In other embodiments, the length of the mast 50 can be changed by adopting a telescopic mast design, that is, the mast can include a first rod and a second rod which are in sliding fit, a driving mechanism for driving the first rod to slide along the length direction of the first rod is arranged on the second rod, and the position of the first rod relative to the second rod is changed by the extension and contraction of the driving mechanism, so as to adjust the length of the mast, but the design makes the weight of the mast larger, and further increases the weight of the jacking mechanism 63.

As shown in fig. 5 and 6, the embodiment of the present invention further provides a crane including the mast 50, and the mast 50 includes all technical features of the mast 50, and therefore, not described herein. In addition, the crane further comprises a rotary table 60, and a main jib 61, a super-lift device, a main luffing pull plate 62, a jacking mechanism 63, etc. arranged on the rotary table 60, which are all conventional components of a super-lift crane, and the specific arrangement and operation principle thereof are also the same as those of the existing super-lift crane, and therefore, the description and explanation are not provided herein too much.

As shown in fig. 5, under the standard working condition, the crane does not use the super lift device or the super lift device does not work, at this time, the mast 50 adopts the arrangement mode of connecting the first section arm 10 and the second section arm 20 through the middle arm 30, so as to increase the length of the mast 50, further reduce the amplitude pulling plate force, the amplitude rope force and the mast 50 force, and avoid the phenomenon that the crane cannot lift the arm under the standard working condition.

As shown in fig. 6, in the super-lift condition, the super-lift device works, and at this time, the mast 50 adopts a configuration in which the first knuckle arm 10 is directly connected to the second knuckle arm 20, so as to reduce the length of the mast 50 and prevent the second end of the second knuckle arm 20 of the mast 50 from being scraped by the super-lift device.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mast, characterized in that the mast (50) adopts a truss structure and comprises a chord member (51) and a plurality of web members (52) arranged on the chord member (51), the chord member (51) is provided with a first end and a second end which are opposite, the first end of the chord member (51) is used for threading and winding a steel wire rope, and the second end of the mast (50) is used for being hinged with a rotary table of a crane.

2. A mast according to claim 1, wherein the mast (50) comprises:

a first arm (10), the first arm (10) having opposing first and second ends;

a second arm (20), the second arm (20) having opposite first and second ends, the first end of the second arm (20) being removably connected to the first end of the first arm (10); and

the two ends of the middle arm (30) are detachably connected with the first end of the first section arm (10) and the first end of the second section arm (20) respectively.

3. A mast according to claim 2, characterized in that the intermediate arm (30) comprises a plurality of intermediate arm bodies connected in series, each adjacent two of the intermediate arm bodies being detachably connected, the two intermediate arm bodies at the sides being detachably connected to the first end of the first knuckle arm (10) and the first end of the second knuckle arm (20), respectively.

4. A mast according to claim 2, wherein the middle arm (30) is provided at both ends thereof with a first engaging lug (40) and a second engaging lug (41), the first end of the first arm (10) is provided with a third engaging lug (42) matching with the first engaging lug (40), the first end of the second arm (20) is provided with a fourth engaging lug (43) matching with the second engaging lug (41), and the third engaging lug (42) matches with the fourth engaging lug (43).

5. A mast according to claim 2, characterized in that the first and second knuckle arms (10, 20) are progressively lower in height in a direction away from the intermediate arm (30).

6. A mast according to claim 2, characterized in that the second end of the first knuckle arm (10) is provided with a pulley block (11) for passing a wire rope.

7. A mast according to claim 2, characterized in that the second end of the second knuckle arm (20) is provided with an articulated lug (21) for articulation with the turntable of a crane.

8. A mast according to claim 2, characterized in that the second end of the second boom (20) is provided with a jacking bracket (22) for jacking by a jacking mechanism (63) of a crane.

9. A mast according to claim 8, characterized in that the shape of the jacking bracket (22) matches the shape of the second end of the second knuckle arm (20).

10. A crane, characterized by comprising a mast (50) according to any one of claims 1 to 9.