Tower crane boom and tower crane

Abstract

The utility model relates to the field of tower cranes, and discloses a tower crane boom and a tower crane. The tower crane boom comprises a telescopic knuckle arm, and the telescopic knuckle arm comprises a first knuckle arm, a second knuckle arm and a third knuckle arm which are sequentially nested in a sliding manner; one end of the telescopic driving mechanism is fixed on the outer wall surface of the first section arm, the other end of the telescopic driving mechanism is fixed on the outer wall surface of the second section arm, and the telescopic driving mechanism is used for driving and adjusting the sliding distance between the first section arm and the second section arm; and the linkage assembly is used for performing follow-up control on the third section arm and the second section arm. The tower crane comprises the tower crane boom. Compared with the mode that the telescopic device is arranged in the knuckle arm in the prior art, an operator can directly carry out high-altitude maintenance on the external telescopic driving mechanism in the invention, and the crane boom of the tower crane and the knuckle arm do not need to be disassembled. When the second section arm stretches out and draws back, the third section arm and the second section arm can stretch out and draw back synchronously, impact when the section arms are in place is avoided, and stability of the tower crane cargo boom is guaranteed.

Description

Technical Field

[0001] This application belongs to the field of tower cranes, specifically relating to a tower crane boom and a tower crane. Background Technology

[0002] In the existing design of the tower crane boom 100, such as Figure 1 As shown, a truss structure is generally used. After multiple truss boom sections are assembled, the boom length cannot be adjusted. This means that once the tower crane boom 100 is assembled, there is only one boom length available for use. If it is necessary to change or adjust the boom length, additional equipment is required to disassemble and assemble the truss boom sections, which is time-consuming and labor-intensive. The tower crane boom 100 can also be configured with interlocking boom sections, and the distance between the sections can be adjusted via a telescopic device to regulate the boom length. However, existing telescopic devices are generally located inside the boom sections, which is not conducive to high-altitude maintenance of the boom.

[0003] Furthermore, when the tower crane boom 100 includes three or more boom sections, the telescopic device can generally only control the extension and retraction of each boom section step by step. When each boom section is in place, a large impact will be generated, which is not conducive to the stability of the tower crane boom 100. Utility Model Content

[0004] The purpose of this application is to provide a tower crane boom and tower crane to facilitate high-altitude maintenance of the tower crane boom and achieve synchronous and stable extension of each boom section.

[0005] To achieve the above objectives, this application provides a tower crane jib, which includes:

[0006] The telescopic arm includes a first arm, a second arm, and a third arm that slide and nest sequentially.

[0007] The telescopic drive mechanism has one end fixed to the outer wall of the first arm section and the other end fixed to the outer wall of the second arm section. The telescopic drive mechanism is used to drive and adjust the sliding distance between the first and second arm sections.

[0008] The linkage component is used for follow-up control of the third and second arm sections.

[0009] In some implementations, the linkage component includes:

[0010] The first linkage component is used to drive the third arm to follow the second arm and move away from the first arm when the telescopic drive mechanism drives the second arm away from the first arm.

[0011] In some implementations, the first linkage component includes:

[0012] The first steering pulley is installed at the head end of the second boom section;

[0013] The first traction rope has one end fixed to the first section arm and the other end fixed to the tail end of the third section arm via the first diverting pulley.

[0014] In some embodiments, the linkage assembly further comprises:

[0015] The second linkage assembly is configured to drive the third section arm to follow the second section arm and move close to the first section arm when the telescopic drive mechanism drives the second section arm to move close to the first section arm.

[0016] In some embodiments, the second linkage assembly comprises:

[0017] The second diverting pulley is installed on the tail end of the second section arm.

[0018] The second traction rope has one end fixed to the third section arm and the other end fixed to the head end of the first section arm via the second diverting pulley.

[0019] In some embodiments, the telescopic drive mechanism is a telescopic oil cylinder.

[0020] In some embodiments, the first section arm and the second section arm are each provided with an ear hinge seat on the outer wall surface, and the two ends of the telescopic drive mechanism are detachably hinged to the ear hinge seats.

[0021] Another aspect of the present application protects a tower crane, which comprises the tower crane jib described above.

[0022] In some embodiments, the tower crane further comprises:

[0023] The slewing bearing;

[0024] The upper support, to which the tower crane jib is hingedly connected, is installed on the slewing bearing; and

[0025] The tower body, to which the slewing bearing is installed, has a top end.

[0026] In some embodiments, the tower crane further comprises a luffing oil cylinder, one end of which is hingedly connected to the upper support and the other end of which is hingedly connected to the tower crane jib.

[0027] Through the above technical solutions, the tower crane jib provided by the embodiments of the present application has the following beneficial effects:

[0028] Compared with the design mode of the truss structure of the tower crane jib in the prior art, the plurality of section arms of the tower crane jib are sequentially sleeved, even in the working state of the tower crane, the distance between the section arms can be directly adjusted by the external telescopic driving mechanism, so that the length of the jib is adjusted, the operation range is flexible, the truss section arm does not need to be disassembled by means of additional equipment, the overall installation and scene transfer efficiency of the tower crane jib is improved, and the transportation cost is reduced. In addition, since the telescopic driving mechanism is arranged on the outer wall surface of the tower crane jib, the operator can directly maintain the tower crane jib in the air without disassembling the tower crane jib and disassembling the section arms. The tower crane jib of the present application also realizes the synchronous telescoping between the section arms through the linkage assembly, so as to avoid the large impact that may be generated when a single section arm is in place during the step-by-step telescoping of each section arm, so as to ensure the stability of the tower crane jib.

[0029] Other features and advantages of the embodiments of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings are included to provide a further understanding of the embodiments of the present application, and constitute a part of the specification, and are used to explain the embodiments of the present application together with the following specific embodiments, but do not constitute a limitation of the embodiments of the present application. For those skilled in the art, other drawings can also be obtained from the structures shown in the drawings without creative labor. In the drawings:

[0031] Figure 1 is a structural schematic diagram of a tower crane jib of the prior art;

[0032] Figure 2 is a structural schematic diagram of a tower crane jib according to the embodiments of the present application;

[0033] Figure 3 is a structural schematic diagram of a tower crane provided with the tower crane jib in Figure 2 .

[0034] Explanation of reference signs

[0035] 100 jib 110 first section arm

[0036] 120 second section arm 130 third section arm

[0037] 140 telescopic driving mechanism 150 first linkage assembly

[0038] 151 first diverting pulley 152 first traction rope

[0039] 160 second linkage assembly 161 second diverting pulley

[0040] 162 second traction rope 200 slewing bearing

[0041] 300 upper support 400 tower body

[0042] 500 lifting mechanism 600 lifting wire rope

[0043] 700 guide pulley carrier 800 amplitude-changing oil cylinder DETAILED DESCRIPTION

[0044] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0045] A tower crane jib and a tower crane according to the present application are described below with reference to the accompanying drawings.

[0046] The present application discloses a new type of tower crane jib. As shown in Figure 2 , a tower crane jib 100 in a specific embodiment comprises:

[0047] a telescopic jib arm, comprising a first jib arm 110, a second jib arm 120 and a third jib arm 130 which are sequentially and slidably nested;

[0048] a telescopic driving mechanism 140, one end of which is fixed to the outer wall surface of the first jib arm 110 and the other end of which is fixed to the outer wall surface of the second jib arm 120, the telescopic driving mechanism 140 being used to drive adjustment of the sliding distance between the first jib arm 110 and the second jib arm 120; and

[0049] a linkage assembly, used to follow-up control the third jib arm 130 and the second jib arm 120.

[0050] Referring to Figure 2 , the jib arms of the telescopic jib arm are nested with each other and the distance between the first jib arm 110 and the second jib arm 120 is adjusted by the telescopic driving mechanism 140. In the prior art, as shown in Figure 1 , the jib arms of the telescopic jib arm are nested with each other and the distance between the first jib arm 110 and the second jib arm 120 is adjusted by the telescopic driving mechanism 140. In the prior art, as shown inAs shown, the crane boom 100 is a truss structure, and the length of the crane boom 100 is fixed and cannot be changed according to the lifting working condition, and the transportation and storage are difficult. Compared with the prior art, the tower crane in the working state can also realize the adjustment of the length of the crane boom 100 by controlling the telescopic driving mechanism 140, without the need to disassemble and assemble the truss section arm by means of additional equipment as in the prior art. Further, the telescopic driving mechanism 140 is arranged on the outer wall surface of the telescopic section arm. Compared with the arrangement of the telescopic device in the section arm in the prior art, the operator can directly maintain the telescopic driving mechanism 140 in the air, without the need to disassemble the tower crane boom 100 and disassemble the section arm. In addition, the tower crane boom 100 further comprises a linkage assembly for following control of the third section arm 130 and the second section arm 120, that is, when the first section arm 110 pushes out (or retracts) the second section arm 120, the third section arm 130 can be synchronously pushed out (or retracted) with the second section arm 120, thereby avoiding the large impact that can be generated when a single section arm is in place in the process of telescoping each section arm, and further affecting the stability of the tower crane boom 100.

[0051] In the present embodiment, as shown in Figure 2 The linkage assembly can comprise a first linkage assembly 150 for driving the third section arm 130 to follow the second section arm 120 and move away from the first section arm 110 when the telescopic driving mechanism 140 drives the second section arm 120 away from the first section arm 110. In this way, the tower crane boom 100 can simultaneously drive the third section arm 130 and the second section arm 120 to push out by means of a single telescopic driving mechanism 140, without the need to additionally arrange a power device for the pushing out of the third section arm 130. In addition, the linkage pushing out of the third section arm 130 and the second section arm 120 by means of the first linkage assembly 150 also enables the third section arm 130 and the second section arm 120 to be simultaneously in place after the extension of the tower crane boom 100, thereby avoiding the large impact that can be generated when each section arm is gradually pushed out to be in place. It should be understood by those skilled in the art that the first linkage assembly 150 can have various forms, such as a gear and rack mechanism arranged on the first section arm 110, the second section arm 120 and the third section arm 130, respectively, or a rope arrangement assembly comprising a fixed pulley and / or a movable pulley, etc.

[0052] In the present embodiment, as shown in Figure 2 The first linkage assembly 150 can comprise a first diverting pulley 151 mounted at the head end of the second section arm 120, and a first traction rope 152, one end of which is fixed to the first section arm 110, and the other end of which is fixed to the tail end of the third section arm 130 by passing through the first diverting pulley 151.

[0053] When the second section arm 120 is extended from the first section arm 110 under the drive of the telescopic drive mechanism 140, the distance between the first diverting pulley 151 and the first section arm 110 is increased, and the length of the first traction rope 152 between the first diverting pulley 151 and the first section arm 110 is increased, i.e. the length of the first traction rope 152 between the first diverting pulley 151 and the third section arm 130 is correspondingly reduced. Those skilled in the art can understand that the so-called diverting pulley means that the traction rope is diverted when passing through the pulley. At this time, see Figure 2 With the aid of the first diverting pulley 151, the other end of the traction rope will pull the third section arm 130 out of the second section arm 120. In this way, the overall structure of the first linkage assembly 150 is simple, easy to assemble and disassemble, and convenient to maintain. Of course, the fixed position of the first traction rope 152 on the first section arm 110 is not limited to the position shown in the figure, and can also be other positions, such as the tail end of the first section arm 110.

[0054] In the embodiment, as shown in Figure 2 the linkage assembly can further include a second linkage assembly 160 for driving the third section arm 130 to follow the second section arm 120 and approach the first section arm 110 when the telescopic drive mechanism 140 drives the second section arm 120 to approach the first section arm 110. In this way, the tower crane jib 100 can drive the retraction of the third section arm 130 and the second section arm 120 simultaneously through a single telescopic drive mechanism 140, without the need for additional power devices for the telescopic retraction of the third section arm 130. In addition, the second linkage assembly 160 can realize the linkage retraction of the third section arm 130 and the second section arm 120, so that the third section arm 130 and the second section arm 120 can be positioned simultaneously after the tower crane jib 100 is shortened, thereby avoiding the large impact that can be generated when each section arm is retracted to the position step by step. Those skilled in the art can understand that the form of the second linkage assembly 160 can be various, such as respectively providing corresponding gear and rack mechanisms on the first section arm 110, the second section arm 120 and the third section arm 130, or a rope arrangement assembly including a fixed pulley and / or a movable pulley, etc.

[0055] In the embodiment, as shown in Figure 2 the second linkage assembly 160 can include a second diverting pulley 161 installed at the tail end of the second section arm 120, and a second traction rope 162, one end of which is fixed to the third section arm 130, and the other end of which passes through the second diverting pulley 161 and is fixed to the head end of the first section arm 110.

[0056] Under the driving of the telescopic driving mechanism 140, the second section arm 120 is retracted from the first section arm 110, at this time, the distance between the second diverting pulley 161 and the first section arm 110 is increased, the length of the second traction rope 162 between the second diverting pulley 161 and the first section arm 110 is increased accordingly, that is, the length of the second traction rope 162 between the second diverting pulley 161 and the third section arm 130 will be reduced accordingly; under the assistance of the second diverting pulley 161, the other end of the traction rope will pull the third section arm 130 to retract from the second section arm 120. In this way, the overall structure of the first linkage assembly 150 is simple, easy to assemble and disassemble, and convenient to maintain. Of course, the fixed position of the second traction rope 162 on the third section arm 130 is not limited to the position shown in the figure, and can also be other positions, such as the head end of the third section arm 130.

[0057] In the embodiment, as shown in the figure, Figure 2 the telescopic driving mechanism 140 can be a telescopic oil cylinder. Specifically, the cylinder body of the telescopic oil cylinder is connected with one of the first section arm 110 and the second section arm 120, and the cylinder rod of the telescopic oil cylinder is connected with the other one, so as to realize the distance adjustment between the first section arm 110 and the second section arm 120. Of course, the arrangement mode of the cylinder rod and the cylinder body is not limited to the mode shown in the figure, and the positions can also be interchanged.

[0058] In the embodiment, as shown in the figure, Figure 2 the outer wall surfaces of the first section arm 110 and the second section arm 120 can be provided with ear hinges respectively, and the two ends of the telescopic driving mechanism 140 are detachably hinged to the ear hinges respectively.

[0059] Specifically, the ear hinges on the first section arm 110 and the second section arm 120 can all be double-ear plate structures, that is, including two parallel arranged ear plates, the two ends of the telescopic driving mechanism 140 are respectively inserted into the grooves of the double-ear plate structures, and are all connected through the corresponding detachable pin shafts of the double-ear plate structures, so that the telescopic driving mechanism 140 can be quickly assembled and disassembled through the assembly and disassembly of the detachable pin shafts. In this way, the high-altitude maintenance of the tower crane jib 100 can be facilitated.

[0060] The application discloses a novel tower crane, and the tower crane in a specific embodiment comprises the tower crane jib 100. Obviously, the tower crane also has all the technical effects of the tower crane jib 100, which will not be described here again.

[0061] In the embodiment, as shown in the figure, Figure 3 the tower crane further comprises:

[0062] the rotary support 200;

[0063] the upper support 300, the tower crane jib 100 is hingedly connected with the upper support 300 and is installed on the rotary support 200 through the upper support 300; and

[0064] The tower body is 400mm long, and the slewing bearing 200 is installed at the top of the tower body 400mm long.

[0065] In this way, the tower crane jib 100 can not only extend and retract, but also rotate relative to the tower body 400, greatly improving the convenience and flexibility of operation. In non-operating conditions, the tower crane jib 100 can also reduce overall wind resistance by retracting, thereby improving the reliability of the tower crane. The tower body 400 can be a height-adjustable truss structure to extend the tower crane's working height range, allowing it to exceed the working height range of existing mobile cranes (truck cranes).

[0066] In this embodiment, the tower crane may further include a luffing mechanism, which drives the tower crane jib 100 to sway relative to the upper support 300. This allows the tower crane jib 100 to sway relative to the upper support 300, further improving the ease and flexibility of tower crane operation; the tower crane can also improve its reliability under high wind conditions by lowering the jib. The swaying action of the tower crane jib 100 can be achieved by various drive mechanisms. For example... Figure 3 As shown, the tower crane may also include a luffing cylinder 800, one end of which is hinged to the upper support 300, and the other end is hinged to the tower crane jib 100. Thus, the swaying of the tower crane jib 100 can be achieved by the extension and retraction of the luffing cylinder 800, resulting in a simple structure and convenient installation. Of course, the swaying action of the tower crane jib 100 is not limited to being driven by the aforementioned luffing cylinder 800. See also... Figure 3 The tower crane may also include a hoisting mechanism 500, a hoisting wire rope 600, and a guide pulley frame 700. The hoisting mechanism 500 is mounted on the upper support 300. One end of the hoisting wire rope 600 is connected to the hoisting mechanism 500, and after the hoisting wire rope 600 passes over the top pulley of the guide pulley frame 700, the other end of the hoisting wire rope 600 is connected to the boom 100. The hoisting mechanism 500 can be a winch, which raises the hoisting wire rope 600 to drive the hook up and down. This configuration further improves the reliability of the tower crane.

[0067] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0068] In this application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixed", and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0069] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples without contradiction.

Claims

1. A tower crane jib, characterized in that, The tower crane jib comprises: a telescopic jib arm comprising a first jib arm (110), a second jib arm (120) and a third jib arm (130) which are sequentially and slidably nested; a telescopic driving mechanism (140) fixed at one end to an outer wall surface of the first jib arm (110) and at the other end to an outer wall surface of the second jib arm (120), the telescopic driving mechanism (140) being used to drive adjustment of the sliding distance between the first jib arm (110) and the second jib arm (120); and a linkage assembly used to follow-up control of the third jib arm (130) and the second jib arm (120).

2. The tower crane jib of claim 1, wherein, The linkage assembly comprises: a first linkage assembly (150) used to drive the third jib arm (130) to follow the second jib arm (120) and move away from the first jib arm (110) when the telescopic driving mechanism (140) drives the second jib arm (120) to move away from the first jib arm (110).

3. The tower crane jib of claim 2, wherein, The first linkage assembly (150) comprises: a first diverting pulley (151) mounted at the head end of the second jib arm (120); a first traction rope (152) fixed at one end to the first jib arm (110) and at the other end to the tail end of the third jib arm (130) via the first diverting pulley (151).

4. The tower crane jib of claim 1, wherein, The linkage assembly further comprises: a second linkage assembly (160) used to drive the third jib arm (130) to follow the second jib arm (120) and move close to the first jib arm (110) when the telescopic driving mechanism (140) drives the second jib arm (120) to move close to the first jib arm (110).

5. The tower crane jib of claim 4, wherein, The second linkage assembly (160) comprises: a second diverting pulley (161) mounted at the tail end of the second jib arm (120); a second traction rope (162) fixed at one end to the third jib arm (130) and at the other end to the head end of the first jib arm (110) via the second diverting pulley (161).

6. The tower crane jib according to any one of claims 1 to 5, characterized in that The telescopic driving mechanism (140) is a telescopic oil cylinder.

7. The tower crane jib of claim 6, wherein, Ear hinges are arranged on the outer wall surfaces of the first jib arm (110) and the second jib arm (120), and the two ends of the telescopic driving mechanism (140) are detachably hinged to the ear hinges.

8. A tower crane, characterized in that The tower crane comprises the tower crane jib according to any one of claims 1-7.

9. The tower crane of claim 8, wherein, The tower crane further comprises: a slewing bearing (200); an upper support (300) to which the tower crane jib is hingedly connected and by which the tower crane jib is mounted on the slewing bearing (200); and a tower body (400) to which the slewing bearing (200) is mounted at the top end. The tower crane further comprises: a slewing bearing (200); an upper support (300) to which the tower crane jib is hingedly connected and by which the tower crane jib is mounted on the slewing bearing (200); and a tower body (400) to which the slewing bearing (200) is mounted at the top end.

10. The tower crane of claim 9, wherein, The tower crane further comprises a luffing oil cylinder (800), one end of the luffing oil cylinder (800) being hinged with the upper support (300) and the other end being hinged with the tower crane jib.

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