A mast crane

Abstract

The present invention provides a mast crane, which relates to the technical field of cranes. The mast crane includes a base, a slewing chassis, a mast, a boom, a lifting mechanism and a luffing mechanism. The slewing chassis is rotatably arranged on the base in the vertical direction; the mast is fixedly arranged on the top of the slewing chassis in the vertical direction; the root of the boom is hinged to the slewing chassis, and a fixed pulley is arranged at the end of the boom; the lifting mechanism is arranged on the slewing chassis, and the lifting mechanism includes a lifting winch and a lifting wire rope, and the lifting wire rope is respectively connected to the lifting winch and the fixed pulley; the luffing mechanism is arranged on the slewing chassis, and the luffing mechanism includes a luffing winch and a luffing wire rope, and the luffing wire rope is respectively connected to the luffing winch and the end of the boom, and the slewing chassis is connected to the luffing winch. The mast crane provided by the present invention has a simple and compact structure, is easy and quick to assemble, has high stability, and is suitable for occasions with narrow working space.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and in particular to a mast crane. Background Art

[0002] Mast cranes are fixed cranes. Mast cranes have the characteristics of simple structure, easy design and manufacturing, low cost, easy disassembly and assembly, variable amplitude, small deadweight and large capacity. Mast cranes are generally used in occasions where components are heavy, hoisting projects are concentrated, construction sites are narrow, and there is a lack of other suitable large-scale lifting machinery. In the process of dismantling some large machinery and transporting materials, there are often problems such as small working space, the operating range of large-scale lifting machinery cannot be covered, the transported objects are heavy, and manual transport is very difficult. Summary of the invention

[0003] In view of this, the purpose of the present invention is to overcome the deficiencies in the prior art. The present application provides a mast crane to solve the technical problems in the prior art that large lifting machinery is not suitable for occasions with narrow working space and the transported objects are heavy, making manual transportation very difficult.

[0004] The present invention provides the following technical solutions:

[0005] A mast crane, comprising:

[0006] Base;

[0007] A rotary chassis is rotatably arranged on the base in a vertical direction;

[0008] A mast is fixedly mounted on the top of the rotary chassis in a vertical direction;

[0009] A lifting arm, the root of which is hinged to the slewing chassis, and the end of which is provided with a fixed pulley;

[0010] A lifting mechanism is arranged on the revolving chassis, the lifting mechanism comprises a lifting winch and a lifting wire rope, and the lifting wire rope is connected to the lifting winch and the fixed pulley respectively;

[0011] The luffing mechanism is arranged on the revolving chassis, and the luffing mechanism includes a luffing winch and a luffing wire rope. The luffing wire rope is respectively connected to the luffing winch and the end of the boom, and the revolving chassis is connected to the luffing winch.

[0012] In some embodiments of the present application, the rotary chassis includes a disc body and an axle body, the axle body is fixedly connected to the disc body, the base is provided with a through hole, the axle body is rotatably connected in the through hole, and the disc body is meshingly connected to the variable-length winch.

[0013] In some embodiments of the present application, the luffing winch includes a luffing motor, a luffing reducer and a luffing drum, the luffing reducer is respectively meshed and connected to the luffing drum and the disk body, and is connected to the output shaft of the luffing motor, and the luffing wire rope is respectively connected to the luffing drum and the end of the boom.

[0014] In some embodiments of the present application, the amplitude-changing reducer includes a gear group and a rotating shaft group, the gear group is fixedly connected to the rotating shaft group, the output shaft of the amplitude-changing motor is fixedly connected to the rotating shaft group, and the gear group is respectively meshed and connected with the amplitude-changing drum and the disk body.

[0015] In some embodiments of the present application, the gear set includes a first gear and a second gear, the variable amplitude drum is provided with a transmission gear meshingly connected to the first gear, and the disc body is circumferentially provided with a gear ring meshingly connected to the second gear.

[0016] In some embodiments of the present application, the lifting winch includes a lifting motor, a lifting reducer and a lifting drum, the lifting reducer is respectively connected to the output shaft of the lifting motor and the lifting drum, and the lifting wire rope is respectively connected to the lifting drum and the fixed pulley.

[0017] In some embodiments of the present application, the boom length changing mechanism also includes a guide pulley group, the guide pulley group includes a first guide pulley and a second guide pulley, the first guide pulley is arranged on the slewing chassis, and the second guide pulley is arranged at the top of the mast, and the boom length changing wire rope is connected to the end of the boom through the first guide pulley and the second guide pulley in sequence.

[0018] In some embodiments of the present application, the lifting arm includes a fastener and a plurality of arm sections, and a first connecting portion is provided on one of any two adjacent arm sections, and a second connecting portion is provided on the other arm section, and the first connecting portion and the second connecting portion are detachably connected via the fastener so that the plurality of arm sections are connected sequentially along their axial direction.

[0019] In some embodiments of the present application, the lifting mechanism further includes a hook, and one end of the lifting wire rope away from the lifting winch is fixedly connected to the hook.

[0020] In some embodiments of the present application, the mast crane further includes a guy rope, a tower head is sleeved on the top of the mast and is rotatably connected inside the tower head, and the guy rope is fixedly connected to the tower head and the base respectively.

[0021] The embodiments of the present invention have the following advantages:

[0022] The present application proposes a mast crane, which realizes the slewing function of the mast crane by arranging a slewing chassis that rotates in the vertical direction on the base, and the mast, boom, lifting mechanism and luffing mechanism are all connected to the slewing chassis. By connecting the luffing wire rope to the luffing winch and the end of the boom respectively, and hingedly connecting the root of the boom to the slewing chassis, the elevation angle of the boom can be adjusted, thereby realizing the luffing function of the mast crane. A fixed pulley is provided at the end of the boom, and the lifting wire rope is connected to the lifting winch and the fixed pulley respectively, thereby realizing the lifting function of the mast crane. By connecting the slewing chassis to the luffing winch, the luffing winch provides a driving force to drive the slewing chassis to rotate automatically, thereby realizing the automatic rotation function of the slewing chassis. The mast crane consists of a base, a slewing chassis, a mast, a lifting arm, a lifting mechanism and a luffing mechanism. It has fewer overall parts, a simple and compact structure, is easy and quick to assemble, and has high stability. It is suitable for occasions with narrow working spaces and can ensure sufficient stability for lightweight lifting operations. It avoids the technical problem in the prior art that large-scale lifting machinery is not suitable for occasions with narrow working spaces, and the transported objects are heavy, which makes manual transport very difficult.

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 A three-dimensional schematic diagram of a mast crane in some embodiments of the present application is shown;

[0026] Figure 2 Shows Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0027] Figure 3 A schematic front view of a mast crane in some embodiments of the present application is shown;

[0028] Figure 4 A schematic side view of a mast crane in some embodiments of the present application is shown.

[0029] Description of main component symbols:

[0030] 100-mast crane; 10-base; 101-through hole; 20-slewing chassis; 201-disk body; 2011-gear ring; 202-shaft body; 30-mast; 301-tower head; 40-lifting arm; 401-fixed pulley; 402-fastener; 403-arm section; 4031-first connecting part; 4032-second connecting part; 50-lifting mechanism; 501-lifting winch; 5011-lifting motor; 5012-lifting reducer; 50 13-lifting drum; 60-luffing mechanism; 601-luffing winch; 6011-luffing motor; 6012-luffing reducer; 60121-gear set; 601211-first gear; 601212-second gear; 60122-rotating shaft set; 6013-luffing drum; 60131-transmission gear; 602-luffing wire rope; 603-guide pulley set; 6031-first guide pulley; 6032-second guide pulley; 70-cabling rope. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the template are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0036] like Figures 1 to 3 As shown, the embodiment of the present application provides a mast crane 100, which is mainly used in situations where large lifting machinery is not suitable for narrow working space, and the transported objects are heavy and manual transport is very difficult. The mast crane 100 includes a base 10, a slewing chassis 20, a mast 30, a lifting arm 40, a lifting mechanism 50 and a luffing mechanism 60.

[0037] The revolving chassis 20 is rotatably arranged on the base 10 in the vertical direction. The mast 30 is fixedly arranged on the top of the revolving chassis 20 in the vertical direction. The root of the boom 40 is hinged to the revolving chassis 20, and a fixed pulley 401 is arranged at the end of the boom 40.

[0038] See also Figure 4 The lifting mechanism 50 is arranged on the revolving chassis 20, and the lifting mechanism 50 includes a lifting winch 501 and a lifting wire rope (not shown), and the lifting wire rope is respectively connected to the lifting winch 501 and the fixed pulley 401. The luffing mechanism 60 is arranged on the revolving chassis 20, and the luffing mechanism 60 includes a luffing winch 601 and a luffing wire rope 602, and the luffing wire rope 602 is respectively connected to the luffing winch 601 and the end of the boom 40, and the revolving chassis 20 is connected to the luffing winch 601.

[0039] The mast crane 100 provided in the embodiment of the present application has a base 10 that can be fixed to a desired site by bolts or stirrups. The site can be the ground, a base or other structure, so that the mast crane 100 is firmly connected to the site as a whole, improving the overall stability, thereby ensuring that the mast crane 100 can safely and stably perform hoisting operations. The slewing chassis 20 is rotatably arranged on the base 10 in the vertical direction, and the mast 30 is fixedly arranged on the top of the slewing chassis 20 in the vertical direction, so that the mast 30 can rotate synchronously with the slewing chassis 20. The root of the boom 40 is hinged to the slewing chassis 20, so that the boom 40 can rotate synchronously with the slewing chassis 20, and the elevation angle of the boom 40 can be adjusted.

[0040] Specifically, a slewing chassis 20 that rotates in a vertical direction is provided on the base 10, and the mast 30, the boom 40, the lifting mechanism 50 and the luffing mechanism 60 are all connected to the slewing chassis 20, and can rotate synchronously with the slewing chassis 20, thereby realizing the slewing function of the mast crane 100. By connecting the luffing wire rope 602 to the ends of the luffing winch 601 and the boom 40 respectively, and hingedly connecting the root of the boom 40 to the slewing chassis 20, the luffing winch 601 can tighten or loosen the luffing wire rope 602, so that the elevation angle of the boom 40 can be adjusted, thereby realizing the luffing function of the mast crane 100. A fixed pulley 401 is provided at the end of the boom 40 . By connecting the lifting wire rope to the lifting winch 501 and the fixed pulley 401 respectively, the lifting winch 501 can tighten or loosen the lifting wire rope, thereby realizing the lifting function of the mast crane 100 .

[0041] By connecting the slewing chassis 20 with the luffing winch 601, the luffing winch 601 provides a driving force to drive the slewing chassis 20 to rotate automatically, thereby realizing the automatic rotation function of the slewing chassis 20. The mast crane 100 is composed of a base 10, a slewing chassis 20, a mast 30, a lifting arm 40, a lifting mechanism 50 and a luffing mechanism 60, so that the overall parts of the mast crane 100 are relatively few, making the transportation and assembly of the machine very easy, the structure is simple and compact, the assembly is simple and fast, the stability is high, and it can be quickly erected and installed by itself. It is suitable for occasions with narrow working space and can ensure sufficient stability for lightweight lifting operations. It avoids the technical problem that large-scale lifting machinery in the prior art is not suitable for occasions with narrow working space, and the transported objects are heavy, which makes manual transportation very difficult.

[0042] like Figure 1 , Figure 2 and Figure 3As shown, in one embodiment of the present application, optionally, the rotary chassis 20 includes a disc body 201 and an axle body 202, the axle body 202 is fixedly connected to the disc body 201, the base 10 is provided with a through hole 101, the axle body 202 is rotatably connected in the through hole 101, and the disc body 201 is meshingly connected to the variable-length winch 601.

[0043] In this embodiment, the slewing chassis 20 includes a disc body 201 and a shaft body 202. The shaft body 202 is fixedly connected to the disc body 201. Specifically, the base 10 is provided with a through hole 101, and the shaft body 202 is rotatably connected in the through hole 101, so that the slewing chassis 20 is rotatably arranged on the base 10 along the vertical direction. The disc body 201 is meshedly connected with the luffing winch 601, that is, the luffing winch 601 drives the disc body 201 to rotate automatically and synchronously through the gear, thereby driving the shaft body 202 to rotate in the through hole 101, thereby realizing the slewing function of the mast crane 100.

[0044] like Figure 1 , Figure 2 and Figure 3 As shown, in the above-mentioned embodiment of the present application, optionally, the luffing winch 601 includes a luffing motor 6011, a luffing reducer 6012 and a luffing drum 6013, the luffing reducer 6012 is respectively meshed and connected with the luffing drum 6013 and the disk body 201, and is connected to the output shaft of the luffing motor 6011, and the luffing wire rope 602 is respectively connected with the luffing drum 6013 and the end of the boom 40.

[0045] In this embodiment, the luffing winch 601 includes a luffing motor 6011, a luffing reducer 6012 and a luffing drum 6013. The luffing reducer 6012 is respectively meshed and connected with the luffing drum 6013 and the plate body 201, and is connected with the output shaft of the luffing motor 6011, and the luffing wire rope 602 is respectively connected with the luffing drum 6013 and the end of the boom 40.

[0046] Specifically, the output shaft of the luffing motor 6011 drives the luffing reducer 6012 to rotate, and the luffing reducer 6012 can achieve deceleration, amplify torque, and increase torque. It can also drive the luffing drum 6013 and the plate body 201 to rotate, so that the luffing drum 6013 and the slewing chassis 20 rotate, thereby realizing the automatic luffing and automatic slewing functions of the mast crane 100, and further realizing the hoisting operation function of the mast crane 100.

[0047] By connecting the luffing wire rope 602 to the luffing drum 6013 and the end of the boom 40 respectively, and hinged the root of the boom 40 to the slewing chassis 20, the luffing drum 6013 can tighten or loosen the luffing wire rope 602, so that the elevation angle of the boom 40 can be adjusted, thereby realizing the luffing function of the mast crane 100.

[0048] like Figure 1 , Figure 2 and Figure 3 As shown, in the above-mentioned embodiment of the present application, optionally, the amplitude variation reducer 6012 includes a gear group 60121 and a rotating shaft group 60122, the gear group 60121 is fixedly connected to the rotating shaft group 60122, the output shaft of the amplitude variation motor 6011 is fixedly connected to the rotating shaft group 60122, and the gear group 60121 is respectively meshed and connected with the amplitude variation drum 6013 and the disk body 201.

[0049] In this embodiment, the variable amplitude reducer 6012 includes a gear set 60121 and a shaft set 60122. The gear set 60121 is fixedly connected to the shaft set 60122, and the fixed connection method can be key connection or integral molding, so as to achieve a stable connection and improve the stability of transmission.

[0050] Specifically, the output shaft of the luffing motor 6011 is fixedly connected to the shaft group 60122 to drive the shaft group 60122 to rotate, thereby driving the gear group 60121 to rotate synchronously. The gear group 60121 is meshed and connected with the luffing drum 6013 and the disc body 201 respectively, thereby driving the luffing drum 6013 and the disc body 201 to rotate synchronously, realizing the luffing function and the rotation function.

[0051] like Figure 1 , Figure 2 and Figure 3 As shown, in the above embodiment of the present application, optionally, the gear set 60121 includes a first gear 601211 and a second gear 601212, the variable amplitude drum 6013 is provided with a transmission gear 60131 meshingly connected to the first gear 601211, and the disc body 201 is circumferentially provided with a gear ring 2011 meshingly connected to the second gear 601212.

[0052] In this embodiment, the gear set 60121 includes a first gear 601211 and a second gear 601212. The luffing drum 6013 is provided with a transmission gear 60131 meshingly connected with the first gear 601211 to drive the luffing drum 6013 to rotate, and the circumference of the disc body 201 is provided with a gear ring 2011 meshingly connected with the second gear 601212 to drive the rotary chassis 20 to rotate.

[0053] Specifically, the first gear 601211 and the transmission gear 60131 can be helical gears or worm gears, so that the rotation directions of the first gear 601211 and the transmission gear 60131 are perpendicular to each other, so as to realize the function of the luffing drum 6013 to retract and release the luffing wire rope 602, and make the structure compact, which is conducive to the application of the mast crane 100 in narrow space. The second gear 601212 and the ring gear 2011 can be spur gears to realize smooth transmission, so that the slewing chassis 20 rotates smoothly.

[0054] It should be noted that the luffing motor 6011 drives the luffing drum 6013 and the revolving chassis 20 to rotate respectively. It can drive the luffing drum 6013 and the revolving chassis 20 to rotate simultaneously, or it can drive the luffing drum 6013 or the revolving chassis 20 to rotate separately, which does not affect the mechanical operation and simplifies the mechanical structure.

[0055] like Figure 1 , Figure 2 and Figure 3 As shown, in one embodiment of the present application, optionally, the lifting winch 501 includes a lifting motor 5011, a lifting reducer 5012 and a lifting drum 5013, the lifting reducer 5012 is respectively connected to the output shaft of the lifting motor 5011 and the lifting drum 5013, and the lifting wire rope is respectively connected to the lifting drum 5013 and the fixed pulley 401.

[0056] In this embodiment, the hoisting winch 501 includes a hoisting motor 5011, a hoisting reducer 5012 and a hoisting drum 5013. The hoisting reducer 5012 is connected to the output shaft of the hoisting motor 5011 and the hoisting drum 5013 respectively, and the hoisting wire rope is connected to the hoisting drum 5013 and the fixed pulley 401 respectively.

[0057] Specifically, the output shaft of the lifting motor 5011 drives the lifting reducer 5012 to rotate, and the lifting reducer 5012 can achieve deceleration, amplify torque, and increase torque. It can also drive the lifting drum 5013 to rotate, thereby realizing the lifting function of the mast crane 100, and further realizing the hoisting operation function of the mast crane 100.

[0058] like Figure 1 , Figure 2 and Figure 3As shown, in one embodiment of the present application, optionally, the boom mechanism 60 also includes a guide pulley group 603, the guide pulley group 603 includes a first guide pulley 6031 and a second guide pulley 6032, the first guide pulley 6031 is arranged on the rotating chassis 20, and the second guide pulley 6032 is arranged at the top of the mast 30, and the boom wire rope 602 is connected to the end of the boom 40 through the first guide pulley 6031 and the second guide pulley 6032 in sequence.

[0059] In this embodiment, the guide pulley group 603 includes a first guide pulley 6031 and a second guide pulley 6032. The first guide pulley 6031 is arranged on the slewing chassis 20, the second guide pulley 6032 is arranged at the top of the mast 30, and the luffing wire rope 602 is connected to the end of the boom 40 through the first guide pulley 6031 and the second guide pulley 6032 in sequence. Specifically, by providing the first guide pulley 6031 and the second guide pulley 6032, the luffing wire rope 602 is guided, which is conducive to adjusting the elevation angle of the boom 40, and improving the efficiency and stability of adjusting the luffing of the boom 40.

[0060] like Figure 1 , Figure 2 and Figure 4 As shown, in one embodiment of the present application, optionally, the lifting arm 40 includes a fastener 402 and a plurality of arm sections 403, and a first connecting portion 4031 is provided on one of any two adjacent arm sections 403, and a second connecting portion 4032 is provided on the other arm section 403, and the first connecting portion 4031 and the second connecting portion 4032 are detachably connected via the fastener 402, so that the plurality of arm sections 403 are sequentially connected along their axial direction.

[0061] In this embodiment, a plurality of arm sections 403 are provided, and a first connection portion 4031 is provided on one arm section 403 of any two adjacent arm sections 403, and a second connection portion 4032 is provided on the other arm section 403, and the first connection portion 4031 is connected to the second connection portion 4032, so that two adjacent arm sections 403 are connected. The first connection portion 4031 and the second connection portion 4032 are connected by a fastener 402 to achieve a detachable connection, so that the plurality of arm sections 403 are sequentially connected along their axial direction, and the length and number of the arm sections 403 are flexibly adjustable, and the fastener 402 enables the plurality of arm sections 403 to be firmly connected.

[0062] It should be noted that the fastener 402 can be a bolt and a nut, or a pin. The fastener 402 also includes a cotter pin, which is vertically connected to one end of the bolt or the pin to prevent loosening, prevent the bolt or the pin from falling off, and improve its safety performance. Multiple arm sections 403 are detachably connected through the fastener 402, which is convenient for installation and disassembly. Repeated disassembly and assembly can make the crane arm 40 reused many times, saving costs, avoiding waste of raw materials, and being environmentally friendly and energy-saving.

[0063] In one embodiment of the present application, optionally, the lifting mechanism 50 further includes a hook (not shown), and one end of the lifting wire rope away from the lifting winch 501 is fixedly connected to the hook.

[0064] In this embodiment, the lifting mechanism 50 further includes a hook, wherein one end of the lifting wire rope away from the lifting winch 501 is fixedly connected to the hook, and the hook is used to lift and transport objects, so that the lifting operation function of the mast crane 100 can be realized.

[0065] like Figure 1 , Figure 3 and Figure 4 As shown, in one embodiment of the present application, optionally, the mast crane 100 further includes a guy rope 70, the top end of the mast 30 is provided with a tower head 301, and is rotatably connected to the tower head 301, and the guy rope 70 is fixedly connected to the tower head 301 and the base 10, respectively.

[0066] In this embodiment, the mast crane 100 further includes a guy rope 70. A tower head 301 is sleeved on the top of the mast, and the top of the mast 30 is rotatably connected to the tower head 301, so that the mast can rotate relative to the tower head 301, so that the mast can rotate synchronously with the slewing chassis 20 to achieve a slewing function.

[0067] Specifically, the guy rope 70 is fixedly connected to the tower head 301 and the base 10, respectively, so as to stabilize the overall stability of the mast crane 100, achieve a stable connection, and improve safety and stability. Exemplarily, the guy rope 70 can be set to two, three or more, and form a triangular structure to further improve the overall stability of the mast crane 100, and further improve safety and stability.

[0068] For example, the working environment temperature of the mast crane 100 may be -20 degrees Celsius to 40 degrees Celsius, and the wind speed may be lower than level 6. The maximum lifting capacity may be 2 tons, and the rated lifting moment may be 18 tons per meter. The slewing range may be 0 degrees to 180 degrees, and the amplitude range may be 23 degrees to 88 degrees.

[0069] In summary, the mast crane provided in the present application realizes the slewing function of the mast crane by arranging a slewing chassis that rotates in the vertical direction on the base, and the mast, the boom, the lifting mechanism and the luffing mechanism are all connected to the slewing chassis. By connecting the luffing wire rope to the ends of the luffing winch and the boom respectively, and hingedly connecting the root of the boom to the slewing chassis, the elevation angle of the boom can be adjusted, thereby realizing the luffing function of the mast crane. A fixed pulley is provided at the end of the boom, and the lifting wire rope is connected to the lifting winch and the fixed pulley respectively, thereby realizing the lifting function of the mast crane. By connecting the slewing chassis to the luffing winch, the luffing winch provides a driving force to drive the slewing chassis to rotate automatically, thereby realizing the automatic rotation function of the slewing chassis. The mast crane consists of a base, a slewing chassis, a mast, a lifting arm, a lifting mechanism and a luffing mechanism. It has fewer overall parts, a simple and compact structure, is easy and quick to assemble, and has high stability. It is suitable for occasions with narrow working spaces and can ensure sufficient stability for lightweight lifting operations. It avoids the technical problem in the prior art that large-scale lifting machinery is not suitable for occasions with narrow working spaces, and the transported objects are heavy, which makes manual transport very difficult.

[0070] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0071] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0072] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A mast crane, characterized in that: include: Base; A rotary chassis is rotatably arranged on the base in a vertical direction; A mast is fixedly mounted on the top of the rotary chassis in a vertical direction; A lifting arm, the root of which is hinged to the slewing chassis, and the end of which is provided with a fixed pulley; A lifting mechanism is arranged on the revolving chassis, the lifting mechanism comprises a lifting winch and a lifting wire rope, and the lifting wire rope is connected to the lifting winch and the fixed pulley respectively; A luffing mechanism is arranged on the slewing chassis, the luffing mechanism comprises a luffing winch and a luffing steel wire rope, the luffing steel wire rope is respectively connected to the luffing winch and the end of the boom, and the slewing chassis is connected to the luffing winch; The slewing chassis comprises a disc body and an axle body, the axle body is fixedly connected to the disc body, the base is provided with a through hole, the axle body is rotatably connected in the through hole, and the disc body is meshingly connected to the luffing winch; The luffing winch comprises a luffing motor, a luffing speed reducer and a luffing drum, wherein the luffing speed reducer is meshedly connected with the luffing drum and the disk body, and is connected with the output shaft of the luffing motor, and the luffing steel wire rope is connected with the luffing drum and the end of the boom, respectively; The luffing reducer comprises a gear set and a shaft set, the gear set is fixedly connected to the shaft set, the output shaft of the luffing motor is fixedly connected to the shaft set, and the gear set is meshedly connected to the luffing drum and the disc body respectively; The gear set comprises a first gear and a second gear, the luffing drum is provided with a transmission gear meshingly connected with the first gear, and the circumference of the disc body is provided with a gear ring meshingly connected with the second gear; The hoisting winch comprises a hoisting motor, a hoisting reducer and a hoisting drum, wherein the hoisting reducer is connected to the output shaft of the hoisting motor and the hoisting drum respectively, and the hoisting wire rope is connected to the hoisting drum and the fixed pulley respectively; The luffing mechanism further includes a guide pulley group, the guide pulley group includes a first guide pulley and a second guide pulley, the first guide pulley is arranged on the slewing chassis, the second guide pulley is arranged on the top of the mast, and the luffing wire rope is connected to the end of the boom through the first guide pulley and the second guide pulley in sequence; The lifting arm includes a fastener and a plurality of arm sections, and a first connecting portion is provided on one of any two adjacent arm sections, and a second connecting portion is provided on the other arm section, and the first connecting portion and the second connecting portion are detachably connected via the fastener so that the plurality of arm sections are connected sequentially along their axial direction.

2. The mast crane according to claim 1, characterized in that: The lifting mechanism also includes a hook, and one end of the lifting wire rope away from the lifting winch is fixedly connected to the hook.

3. The mast crane according to claim 1, characterized in that: The mast crane also includes a guy rope. The top of the mast is sleeved with a tower head and is rotatably connected inside the tower head. The guy rope is fixedly connected to the tower head and the base respectively.

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