Joint-increasing arm of hoisting equipment and hoisting equipment

Abstract

The utility model provides an increased section arm of hoisting equipment and the hoisting equipment, and relates to the technical field of hoisting. The section-increasing arm of the hoisting equipment comprises a section-increasing arm main body, wherein connecting pieces are respectively arranged at two ends of the section-increasing arm main body; the section-increasing arm main body is connected with adjacent parts through the connecting pieces; the joint-increasing arm body is at least suitable for the machine type I and the machine type II, and the working conditions of the machine type I and the machine type II applying the joint-increasing arm body are different. According to the section-increasing arm of the hoisting equipment provided by the utility model, the section-increasing arm main body is at least suitable for the machine type I and the machine type II, and the working conditions of applying the section-increasing arm main body by the machine type I and the machine type II are different, so that when a customer buys two or more machine types, only one section-increasing arm needs to be purchased and is replaced by one section-increasing arm among various machine types; and the purchase number of the section-increasing arms is effectively reduced, and the use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting, in particular to an additional boom for a hoisting device and a hoisting device. Background Art

[0002] Crawler cranes usually have standard working conditions and superlift working conditions. The standard working condition is the working condition without installing the superlift mast, such as Figures 6 to 11 shown, for example, the standard main boom condition, the standard luffing jib condition (or tower condition), and the standard fixed jib condition; the superlift working condition is the superlift working condition with the superlift mast 4 installed, such as the superlift main boom condition, the superlift luffing jib condition (or tower condition), and the superlift fixed jib condition. Whether in the standard working condition or the superlift working condition, the main boom, the luffing jib, and the fixed jib are generally composed of three different sizes of boom combinations. The main boom, the luffing jib, and the fixed jib are all composed of an upper boom 1, an additional boom 2, and a lower boom 3. The length of the boom is adjusted by adjusting the number of additional booms. The additional booms of the main boom, the luffing jib, and the fixed jib generally adopt three sizes (size A, size B, and size C) through different combinations to form additional booms with different cross-sections.

[0003] Due to the hoisting performance and the structural limitations of the boom, the additional booms of size A, size B, and size C for different models are also different, resulting in users having to purchase more booms when buying multiple different products, increasing the user's usage cost. In the patent with the publication number CN108046141B, by making the cross-sectional dimension of the other end of the bottom section of the jib the same as that of the main boom, and the connection joint and pin dimensions on the boom the same as those of the main boom; and making the cross-sectional dimension of one end of the jib reducing section the same as the cross-sectional dimension of the main boom, and the connection joint and pin dimensions between the booms the same as those of the main boom, the universality of the boom sections in a single model is achieved, but this design cannot be used in different working conditions of hoisting devices of different models. Summary of the Utility Model

[0004] The utility model provides an additional boom for a hoisting device to solve the problem of high usage cost of hoisting devices in the prior art.

[0005] The utility model provides an additional boom for a hoisting device, including:

[0006] An additional boom body, with connectors respectively arranged at both ends of the additional boom body, and the additional boom body is connected to adjacent components through the connectors; the additional boom body is applicable to at least model I and model II, and the working conditions of applying the additional boom body for model I and model II are different, wherein the maximum rated hoisting capacities of model I and model II are different.

[0007] A telescopic boom for a lifting device provided by the present utility model is adapted to the main boom working condition of Model I, and the telescopic boom can be used for the luffing auxiliary boom working condition of Model II.

[0008] A telescopic boom for a lifting device provided by the present utility model further includes:

[0009] A pull plate support component is arranged on one side of the telescopic boom main body. The pull plate support component has at least two pull plate pitches to adapt to different working conditions of the lifting devices of at least two models.

[0010] A telescopic boom for a lifting device provided by the present utility model, the pull plate support component includes at least two pairs of pull plate support components. Each pair of pull plate support components includes two pull plate supports, and the two pull plate supports are arranged at intervals along the width direction of the telescopic boom main body.

[0011] A telescopic boom for a lifting device provided by the present utility model, each pull plate support includes a plurality of pull plate support bodies. The plurality of pull plate support bodies are arranged at intervals along the length direction of the telescopic boom main body. A clamping groove is provided on the pull plate support body, and the pull plate is clamped in the clamping groove of the pull plate support body.

[0012] A telescopic boom for a lifting device provided by the present utility model, at least one of the pull plate support bodies in each pull plate support is provided with a locking member, and the locking member is used to lock the pull plate to the pull plate support body.

[0013] A telescopic boom for a lifting device provided by the present utility model, the pull plate support body is detachably connected to the telescopic boom main body.

[0014] A telescopic boom for a lifting device provided by the present utility model, the connecting member includes a plurality of first connecting members and a plurality of second connecting members. The plurality of first connecting members are arranged at intervals at one end of the telescopic boom main body, and the plurality of second connecting members are arranged at intervals at the other end of the telescopic boom main body.

[0015] A telescopic boom for a lifting device provided by the present utility model, one of the first connecting member and the second connecting member is a male joint, and the other of the first connecting member and the second connecting member is a female joint.

[0016] The present utility model further provides a lifting device, which includes a lifting device main body and the telescopic boom according to any one of the above. The lifting device main body is connected to the telescopic boom.

[0017] The additional boom provided by the utility model for the lifting equipment can be applied to at least Model I and Model II. Since the working conditions of Model I and Model II when using the additional boom are different, when customers purchase two or more models, they only need to buy one type of additional boom. By replacing the additional boom among multiple models, the purchase quantity of the additional boom is effectively reduced, and the usage cost is lowered. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of the additional boom of the lifting equipment provided by the present utility model.

[0020] Figure 2 It is a schematic structural diagram of the main boom working condition of Model I provided by the present utility model.

[0021] Figure 3 It is a schematic structural diagram of the luffing jib working condition of Model I provided by the present utility model.

[0022] Figure 4 It is a schematic structural diagram of the luffing jib working condition of Model II provided by the present utility model.

[0023] Figure 5 It is a schematic structural diagram of the fixed jib working condition of Model II provided by the present utility model.

[0024] Figure 6 It is a schematic structural diagram of the existing standard main boom working condition provided by the present utility model.

[0025] Figure 7 It is a schematic structural diagram of the existing standard fixed jib working condition provided by the present utility model.

[0026] Figure 8 It is a schematic structural diagram of the existing standard luffing jib working condition provided by the present utility model.

[0027] Figure 9 It is a schematic structural diagram of the existing superlift main boom working condition provided by the present utility model.

[0028] Figure 10 It is a schematic structural diagram of the existing superlift fixed jib working condition provided by the present utility model.

[0029] Figure 11It is a schematic structural diagram of the existing luffing jib working condition provided by the present utility model.

[0030] Reference numerals:

[0031] 1. Upper boom; 2. Extension boom; 3. Lower boom; 4. Superlift mast; 10. Extension boom main body; 11. Main chord tube; 12. Web tube; 13. Safety rope connecting piece; 20. Pulling plate support main body; 21. Locking piece; 22. First pulling plate support; 23. Second pulling plate support; 24. Third pulling plate support; 30. First connecting piece; 31. Second connecting piece; 100. Main boom; 101. Lower section of main boom; 102. Extension section of main boom; 103. Upper section of main boom; 200. Luffing jib; 201. Lower section of luffing jib; 202. Extension section of luffing jib; 203. Upper section of luffing jib; 204. Rear mast of luffing jib; 205. Front mast of luffing jib; 300. Fixed jib; 301. Lower section of fixed jib; 302. Extension section of fixed jib; 303. Upper section of fixed jib; 304. Mast of fixed jib. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0033] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0035] In the embodiments of the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0036] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0037] The following Figures 1 - 5 describes the specific structure and usage method of the boom extension of the lifting device of the present utility model.

[0038] As Figure 1 shown, the boom extension of the lifting device includes a boom extension main body 10. Connecting members are respectively provided at both ends of the boom extension main body 10. The boom extension main body is connected to adjacent components through the connecting members, specifically connected to one end of an adjacent boom extension, an upper boom, or a lower boom. The boom extension main body 10 is applicable to at least model I and model II, and the working conditions of model I and model II using the boom extension main body are different. Among them, the maximum rated lifting capacities of model I and model II are different.

[0039] The additional boom of the lifting equipment provided by the present utility model is such that the additional boom main body 10 is applicable to at least model I and model II, and the operating conditions of model I and model II when using the additional boom main body are different. When a customer purchases two or more models, only one type of additional boom needs to be purchased. By substituting one type of additional boom among multiple models, the purchase quantity of the additional boom is effectively reduced, and the usage cost is lowered.

[0040] It should be noted here that different operating conditions in the present utility model refer to the main boom operating condition, the luffing jib operating condition, and the fixed jib operating condition. Of course, the specific types of operating conditions are not limited to this, and it can also refer to other operating conditions.

[0041] In an embodiment of the present utility model, the additional boom is adapted to the main boom operating condition of model I, and the additional boom can be used for the luffing jib operating condition of model II.

[0042] In an embodiment of the present utility model, the cross-sectional dimension of the additional boom under the main boom operating condition of model I is A; the cross-sectional dimension of the additional boom under the luffing jib operating condition of model II is B, and A = B; or, the cross-sectional dimension of the additional boom under the luffing jib operating condition of model I is B; the cross-sectional dimension of the additional boom under the fixed jib operating condition of model II is C, and B = C.

[0043] As shown in Table 1 below, the size of the main boom additional boom of model I (150t lifting equipment) is 2000mm * 1700mm, and the size of the luffing jib additional boom of model III (180t lifting equipment) is 2000 mm * 1700mm. Since their sizes are the same, they can be substituted. At the same time, the cross-sectional dimension A of the additional boom of model II is the same as the cross-sectional dimension B of the additional boom of model III, so that the additional boom can be sleeved into other boom sections or sleeve other boom sections in the boom system of model II, and can also be sleeved in the boom system of model III. Since the probability of sleeving the boom of a single model is a known technology in the field of lifting equipment (see DE102012013001B4), it will not be elaborated here. In addition, the main chord tube of the additional boom has at least two outer diameters. Among them, the additional boom with a larger outer diameter of the main chord tube is installed near the lower boom section for use, and the additional boom with a smaller outer diameter of the main chord tube is installed near the upper boom section for use.

[0044]

[0045] Table 1

[0046] In an embodiment of the present utility model, the telescopic boom further includes multiple sets of pull plate support components. Each set of pull plate support components consists of a pair of pull plate support components, and the pair of pull plate support components are symmetrically arranged along the middle part of the telescopic boom main body 10. The multiple sets of pull plate support components are arranged at intervals along the length direction of the telescopic boom main body 10. The pull plates are placed on the pull plate support components along the length direction of the telescopic boom, and the pull plate support components are arranged at the top of the telescopic boom main body 10. To adapt to different working conditions of at least two types of lifting equipment, at least two types of pitch pull plate support components are provided at the top of the telescopic boom. Each type of pitch pull plate support component includes multiple sets of pull plate support components, and the distance between a pair of pull plate support components in this set of pull plate support components is the same.

[0047] Since the pull plate pitches under different working conditions of different types of lifting equipment are different, in order to enable at least two types of lifting equipment with different working conditions to use the same telescopic boom, different pull plate pitches need to be set. The types of pull plate pitches are specifically determined according to the number of types of lifting equipment used. For example, when using different working conditions of two types of lifting equipment, three types of pull plate pitches need to be set for adaptation.

[0048] In an embodiment of the present utility model, the number of pull plate support components is specifically determined according to the number of types of lifting equipment used. In this embodiment, three types of pitch pull plate support components are provided on one side of the telescopic boom main body 10. Of course, the number of pull plate support components is not limited to this, and four, five or more numbers can also be set. A pair of pull plate support components includes two pull plate supports, and the two pull plate supports are arranged at intervals along the width direction of the telescopic boom main body 10. The distance between the card slots of the two pull plate supports is the pull plate pitch. The two pull plate supports with a larger pull plate pitch are arranged outside the two pull plate supports with a smaller pull plate pitch, and the two pull plate supports with the largest pull plate pitch are arranged on the outermost side.

[0049] In an embodiment of the present utility model, each pull plate support includes a pull plate support body 20. The pull plate support body 20 is provided with a card slot, and the pull plate is clamped in the card slot of the pull plate support body 20. The width of the card slot is slightly larger than the thickness of the pull plate to facilitate the pull plate to be inserted into and taken out of the card slot. At the same time, if the width of the card slot is too large, the pull plate will shake after being inserted into the card slot. Therefore, the specific width of the card slot takes the optimal value according to the thickness of the pull plate. The pull plate support body 20 is welded to or integrally formed with the telescopic boom main body 10. Of course, it can also be connected by bolts.

[0050] In a specific embodiment of the present utility model, such as Figure 1As shown in the figure, the stay plate support component includes three pairs of stay plate support components, namely the first stay plate support component, the second stay plate support component, and the third stay plate support component. The first stay plate support component includes two first stay plate supports 22, and the two first stay plate supports 22 are arranged at intervals in the width direction of the telescopic boom main body 10. The stay plate pitch between the two first stay plate supports 22 is L1. The first stay plate support 22 includes four first stay plate support bodies, and the four first stay plate support bodies are arranged at intervals in the length direction of the telescopic boom main body 10. The four first stay plate support bodies are on the same straight line, and the card slots of the four first stay plate support bodies are also on the same straight line. The connection line between the two first stay plate support bodies on the left is perpendicular to the length direction of the telescopic boom main body 10, the connection line between the two first stay plate support bodies on the right is perpendicular to the length direction of the telescopic boom main body 10, and the connection line between the two first stay plate support bodies in the middle forms an acute angle with the length direction of the telescopic boom main body 10.

[0051] As Figure 1 shown in the figure, the second stay plate support component includes two second stay plate supports 23, and the two second stay plate supports 23 are arranged at intervals in the width direction of the telescopic boom main body 10. The two second stay plate supports 23 are located outside the two first stay plate supports 22, and the stay plate pitch between the two second stay plate supports 23 is L2. The second stay plate support 23 includes four second stay plate support bodies, and the four second stay plate support bodies are arranged at intervals in the length direction of the telescopic boom main body 10. The four second stay plate support bodies are on the same straight line, and the card slots of the four second stay plate support bodies are also on the same straight line. The connection line between the two second stay plate support bodies on the left is perpendicular to the length direction of the telescopic boom main body 10, the connection line between the two second stay plate support bodies on the right is perpendicular to the length direction of the telescopic boom main body 10, and the connection line between the two second stay plate support bodies in the middle forms an acute angle with the length direction of the telescopic boom main body 10.

[0052] The third stay plate support component includes two third stay plate supports 24, and the two third stay plate supports 24 are arranged at intervals in the width direction of the telescopic boom main body 10. As Figure 1 shown in the figure, the two third stay plate supports 24 are located outside the two second stay plate supports, and the stay plate pitch between the two third stay plate supports 24 is L3. The third stay plate support 24 includes four third stay plate support bodies, and the four third stay plate support bodies are arranged at intervals in the length direction of the telescopic boom main body 10. The four third stay plate support bodies are on the same straight line, and the card slots of the four third stay plate support bodies are also on the same straight line. The connection line between the two third stay plate support bodies on the left is perpendicular to the length direction of the telescopic boom main body 10, the connection line between the two third stay plate support bodies on the right is perpendicular to the length direction of the telescopic boom main body 10, and the connection line between the two third stay plate support bodies in the middle forms an acute angle with the length direction of the telescopic boom main body 10.

[0053] As Figure 1 shown, the second pull plate support member includes two second pull plate supports 23, and the two second pull plate supports 23 are arranged at intervals in the width direction of the telescopic boom main body 10. The two second pull plate supports 23 are located outside the two first pull plate supports 22, and the pull plate pitch between the two second pull plate supports 23 is L2. The second pull plate support 23 includes four second pull plate support bodies, and the four second pull plate support bodies are arranged at intervals in the length direction of the telescopic boom main body 10. The four second pull plate support bodies are on the same straight line, and the card slots of the four second pull plate support bodies are also on the same straight line. The connection line between the two second pull plate support bodies on the left is perpendicular to the length direction of the telescopic boom main body 10, the connection line between the two second pull plate support bodies on the right is perpendicular to the length direction of the telescopic boom main body 10, and the connection line between the two second pull plate support bodies in the middle forms an acute angle with the length direction of the telescopic boom main body 10.

[0054] The third pull plate support member includes two third pull plate supports 24, and the two third pull plate supports 24 are arranged at intervals in the width direction of the telescopic boom main body 10. As Figure 1 shown, the two third pull plate supports 24 are located outside the two second pull plate supports, and the pull plate pitch between the two third pull plate supports 24 is L3. The third pull plate support 24 includes four third pull plate support bodies, and the four third pull plate support bodies are arranged at intervals in the length direction of the telescopic boom main body 10. The four third pull plate support bodies are on the same straight line, and the card slots of the four third pull plate support bodies are also on the same straight line. The connection line between the two third pull plate support bodies on the left is perpendicular to the length direction of the telescopic boom main body 10, the connection line between the two third pull plate support bodies on the right is perpendicular to the length direction of the telescopic boom main body 10, and the connection line between the two third pull plate support bodies in the middle forms an acute angle with the length direction of the telescopic boom main body 10.

[0055] In a preferred embodiment of the present utility model, the first pull plate support body, the second pull plate support body, and the third pull plate support body in the same row are integrally formed. Specifically, three card slots can be provided on a steel plate, and the three card slots respectively correspond to the card slot of the first pull plate support body, the card slot of the second pull plate support body, and the card slot of the third pull plate support body. The steel plate is welded to the belly tube 12. Compared with setting multiple independent pull plate support bodies 20, by adopting an integrally formed design for the multiple pull plate support bodies 20, the number of components is effectively reduced, the structure is simplified, and the assembly efficiency of the lifting equipment is improved.

[0056] In a preferred embodiment of the present utility model, at least one pull plate support body 20 in each pull plate support is provided with a locking member 21, and the locking member 21 is used to lock the pull plate to the pull plate support body 20. By providing the locking member 21, the pull plate is locked to the pull plate support body 20 when the pull plate is not in use, so that the pull plate is stably fixed on one side of the telescopic boom main body 10, effectively improving the safety of the lifting equipment.

[0057] Specifically, as Figure 1 shown, the locking member 21 includes a pin shaft and a pin shaft lock. An installation hole is provided at one end of the pull plate support body 20 away from the telescopic boom main body 10. The pin shaft is inserted into the installation hole to lock the pull plate in the card slot. An end cover is provided at one end of the pin shaft, and the end cover is in limit fit with the installation hole. A through hole is provided at the other end of the pin shaft, and the pin shaft lock is inserted into the through hole to lock the pin shaft in the through hole. Of course, the specific structural form of the locking member 21 is not limited to this, and other structural forms of locking members can also be used.

[0058] In a preferred embodiment of the present utility model, the pull plate support body 20 is detachably connected to the telescopic boom main body 10. When the telescopic boom is used in a certain working condition of a certain model, only part of the pull plate support bodies 20 are utilized. If the telescopic boom is used in a certain working condition of a certain model for a long time, then part of the pull plate support bodies 20 will not be effectively utilized for a long time, which not only increases the use cost, but also causes the unused pull plate support bodies to rust. By making the pull plate support body 20 detachably connected to the telescopic boom main body 10, when the pull plate support body 20 with a certain pull plate pitch is not used for a long time, it can be disassembled and used for other working conditions, thus improving the utilization rate of the pull plate support body 20 and reducing the use cost.

[0059] Specifically, the pull plate support body 20 is connected to the corresponding chord 12 by bolts. Preferably, the chord 12 is provided with a limit groove, and part of the pull plate support body 20 is embedded in the limit groove, and the bottom wall of the limit groove is connected to the pull plate support body 20 by bolts.

[0060] In a preferred embodiment of the present utility model, the position of the pull plate support body 20 on the telescopic boom main body 10 is adjustable. Specifically, a connection hole is provided at one end of the pull plate support body 20 close to the telescopic boom main body 10. The pull plate support body 20 is sleeved on the corresponding chord 12 through the connection hole. A plurality of positioning holes (not shown) are provided on the chord 12, and the plurality of positioning holes are arranged at intervals along the length direction of the chord 12. A through hole is provided on the side wall of the connection hole, and an adjusting bolt is inserted into the through hole, and the adjusting bolt is in threaded fit with the positioning hole.

[0061] When it is necessary to change the drawbar pitch of the drawbar support component, remove the adjusting bolt, adjust the drawbar support body 20 to a suitable position (i.e., adjust the drawbar support component to a suitable drawbar pitch), then tighten the adjusting bolt to fix the position of the drawbar support body 20. At this time, the drawbar pitch of the drawbar support component is the adjusted drawbar pitch. The adjustable structural design enables a drawbar support component to meet the use requirements of multiple working conditions, effectively reducing the number of drawbar support bodies 20 and lowering the production and use costs. Of course, the adjustable manner of the drawbar support body 20 is not limited to this and is specifically determined according to actual needs.

[0062] In an embodiment of the present utility model, the connecting piece includes a plurality of first connecting pieces 30 and a plurality of second connecting pieces 31. The plurality of first connecting pieces 30 are arranged at intervals at one end of the boom extension main body 10, and the plurality of second connecting pieces 31 are arranged at intervals at the other end of the boom extension main body 10. When two adjacent boom extensions are connected, the first connecting piece 30 of one boom extension is connected to the second connecting piece 31 of the adjacent boom extension, thereby realizing the connection of the two boom extensions. The number of the first connecting pieces 30 and the number of the second connecting pieces 31 in this embodiment are not limited to this and are specifically determined according to the cross-sectional shape of the boom extension main body 10 and the number of the main chord pipes 11.

[0063] In an embodiment of the present utility model, the distance between two adjacent first connecting pieces 30 is the same as the distance between two second connecting pieces 31 of the adjacent boom extensions. When connecting two adjacent boom extensions, in order to ensure the accurate connection of the connecting parts of the two boom extensions, in addition to ensuring the same number of connecting parts, it is also necessary to ensure the same position of the connecting parts. By making the distance between two adjacent first connecting pieces 30 the same as the distance between two second connecting pieces 31 of the adjacent boom extensions, it can be ensured that the first connecting piece 30 of one boom extension can be accurately docked with the second connecting piece 31 of the adjacent boom extension.

[0064] In an embodiment of the present utility model, one of the first connecting piece 30 and the second connecting piece 31 is a male joint, and the other of the first connecting piece 30 and the second connecting piece 31 is a female joint.

[0065] Specifically, as Figure 1 shown, four female joints are provided at the left end of the boom extension main body 10, and four male joints are provided at the right end of the boom extension main body 10. The inner diameter of the connection hole of the female joint is the same as the inner diameter of the connection hole of the male joint. When connecting two adjacent boom extensions, insert the male joint of the boom extension into the female joint of the adjacent boom extension, and then insert the locking pin into the connection holes of the male joint and the female joint, and the two adjacent boom extensions can be connected together.

[0066] In an embodiment of the present utility model, a safety rope connecting member 13 is provided on one side of the boom extension main body 10. The safety rope connecting member 13 extends along the length direction of the boom extension main body 10 and is used to connect a safety rope to facilitate maintenance personnel to maintain the lifting equipment. Specifically, the safety rope connecting member 13 is a steel wire rope. There are two steel wire ropes, and the two steel wire ropes are spaced apart along the width direction of the boom extension main body 10. One end of the steel wire rope is connected to one end of the boom extension main body 10 through a connecting member, and the other end of the steel wire rope is connected to the other end of the boom extension main body 10 through a connecting member.

[0067] In an embodiment of the present utility model, the boom extension main body 10 is of a truss structure or a box structure. Preferably, the boom extension main body 10 is of a truss structure.

[0068] In an embodiment of the present utility model, the boom extension main body 10 includes a plurality of main chord pipes 11 and a plurality of web pipes 12. The plurality of main chord pipes 11 are spaced around the outer periphery of the central axis of the boom extension main body 10. The main chord pipes 11 extend along the length direction of the boom extension main body 10, and a plurality of web pipes 12 are spaced between two adjacent main chord pipes 11.

[0069] Specifically, as Figure 1 shown, the boom extension main body 10 includes four main chord pipes 11 and a plurality of web pipes 12. The four main chord pipes 11 are spaced around the outer periphery of the central axis of the boom extension main body 10. The cross-section of the boom extension main body 10 is rectangular, and the four main chord pipes 11 are located at the four vertices of the rectangle. Four male connectors are correspondingly provided at the right ends of the four main chord pipes 11, and the male connectors are welded to the main chord pipes 11. Four female connectors are correspondingly provided at the left ends of the four main chord pipes 11, and the female connectors are welded to the main chord pipes 11. A plurality of web pipes 12 are spaced between two adjacent main chord pipes 11, and the web pipes 12 are welded to the main chord pipes 11. The web pipes 12 at both ends of the boom extension main body 10 are perpendicular to the main chord pipes 11, and the web pipes 12 in the middle are at an acute angle with the main chord pipes 11.

[0070] In an embodiment of the present utility model, the cross-section of the boom extension main body 10 is rectangular, and the width of the boom extension main body 10 is Figure 1 D1 in Figure 1 . The height of the boom extension main body 10 is D2 in

[0071] . In order to make the boom extension suitable for different working conditions of at least two types of lifting equipment, it is necessary to ensure that the widths and heights of the cross-sections of two adjacent boom extension main bodies 10 are the same. Figure 2 and Figure 4The telescopic jib is applicable to the main boom working condition of Model I and the luffing fly jib working condition of Model II. The models are distinguished by the maximum rated lifting capacity here. For example, the maximum rated lifting capacity of Model I is 160 tons, and the maximum rated lifting capacity of Model II is 220 tons. Before introducing the working conditions of the telescopic jib, the structures of the main boom working condition of Model I and the luffing fly jib working condition of Model II will be introduced first.

[0072] As Figure 2 shown, the main boom working condition of Model I includes the main boom 100 and the machine body connected to the main boom 100. The main boom 100 includes the lower section of the main boom 101, the telescopic jib of the main boom 102, and the upper section of the main boom 103. Among them, the lower end of the lower section of the main boom 101 is hinged to the machine body, the lower end of the telescopic jib of the main boom 102 is connected to the upper end of the lower section of the main boom 101 through a reducing boom section, and the upper end of the telescopic jib of the main boom 102 is connected to the lower end of the upper section of the main boom 103 through another reducing boom section. Figure 2 It is shown in the figure that the telescopic jib has only two sections. In actual use, multiple sections of telescopic jibs will be set according to the usage requirements. The multiple sections of telescopic jibs are connected in sequence and are located between the reducing boom sections. The reducing boom sections are used to adapt to the cross-sectional changes of the increasing boom and the upper and lower boom sections and play a transitional role.

[0073] As Figure 3 shown, the luffing fly jib working condition of Model I includes the main boom 100 and the luffing fly jib 200. The luffing fly jib 200 includes the lower section of the luffing fly jib 201, the telescopic jib of the luffing fly jib 202, the upper section of the luffing fly jib 203, the rear mast of the luffing fly jib 204, and the front mast of the luffing fly jib 205. Among them, the luffing fly jib 200 is hinged and installed at the upper end of the main boom 100, or can also be hinged and installed at the lower end of the luffing fly jib 200. Specifically, the lower end of the lower section of the luffing fly jib 201 is hinged to the upper end of the upper section of the main boom 103, the lower end of the telescopic jib of the luffing fly jib 202 is connected to the upper end of the lower section of the luffing fly jib 201, and the upper end of the lower section of the luffing fly jib 201 is connected to the lower end of the upper section of the luffing fly jib 203.

[0074] At least one of the lower end of the front mast of the luffing fly jib 205 and the lower end of the rear mast of the luffing fly jib 204 is hinged to the lower section of the luffing fly jib 201 or the upper section of the main boom 103. The upper end of the upper section of the luffing fly jib 203 is connected to the upper end of the front mast of the luffing fly jib 205 through a pull plate or a pull rope. The upper ends of the front mast of the luffing fly jib 205 and the rear mast of the luffing fly jib 204 are connected through a pulley block. By changing the length of the wire rope of the pulley block, the included angle between the front mast of the luffing fly jib 205 and the rear mast of the luffing fly jib 204 can be adjusted. The upper end of the rear mast of the luffing fly jib 204 is connected to the lower end of the lower section of the main boom 101 through a pull plate or a pull rope. As Figure 4 shown, the structure of the luffing fly jib working condition of Model II is the same as that of the luffing fly jib working condition of Model I, and will not be introduced in detail here.

[0075] As Figure 2and Figure 4 As shown in Figure 4 , in the main boom working condition of Model I, the extension boom is used as the main boom extension boom 102, and in the luffing jib working condition of Model II, the extension boom is used as the luffing jib extension boom 202. When Model I and Model II are purchased simultaneously, the main boom extension boom 102 in the main boom working condition of Model I and the luffing jib extension boom 202 in the luffing jib working condition of Model II can be substituted, thus reducing the purchase quantity of the extension boom and lowering the usage cost. At the same time, by further defining the relationship between the sizes of the cross-sections (see A, B, and C in Table 1), the extension boom can achieve the nested function within the boom systems of the two models, which can further reduce the transportation cost of the boom system.

[0076] The following introduces the extension boom applicable to the luffing jib working condition (the angle between the main boom and the jib is variable) of Model I and the fixed jib working condition (the angle between the main boom and the jib is pre-fixed) of Model II. Before introducing the working conditions of the extension boom, the fixed jib working condition of Model II will be introduced first.

[0077] As Figure 5 shown, the fixed jib working condition of Model II includes the main boom 100 and the fixed jib 300. The fixed jib 300 includes the lower section of the fixed jib 301, the extension boom of the fixed jib 302, the upper section of the fixed jib 303, and the mast of the fixed jib 304. The fixed jib 300 is hinged to the upper end of the main boom 100. Specifically, the lower end of the lower section of the fixed jib 301 is hinged to the upper end of the upper section of the main boom 103, the lower end of the extension boom of the fixed jib 302 is connected to the lower section of the fixed jib 301, the upper end of the extension boom of the fixed jib 302 is connected to the lower end of the upper section of the fixed jib 303, the lower end of the mast of the fixed jib 304 is hinged to the lower section of the fixed jib 301 or the upper section of the main boom 103, and the upper end of the mast of the fixed jib 304 is connected to the upper end of the upper section of the fixed jib 303 and the lower end of the main boom 100 respectively through a pull plate or a pull rope. The structure of the fixed jib of Model I is the same as that of the fixed jib of Model II and will not be introduced in detail here.

[0078] As Figure 3 and Figure 5 shown, when the extension boom is used as the luffing jib extension boom 202 in the luffing jib working condition of Model I, the extension boom is used as the extension boom of the fixed jib 302 in the fixed jib working condition of Model II. When Model I and Model II are purchased simultaneously, the luffing jib extension boom 202 in the luffing jib working condition of Model I and the extension boom of the fixed jib 302 in the fixed jib working condition of Model II can be substituted, thus reducing the purchase quantity of the extension boom and lowering the usage cost.

[0079] The present utility model also provides a lifting device, which includes a lifting device main body and the extension boom described in any one of the above embodiments. The lifting device main body is connected to the extension boom.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. And these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An additional boom of a lifting device, characterized in that, Comprising: A telescopic jib main body (10), with connectors respectively arranged at both ends of the telescopic jib main body (10), and the telescopic jib main body (10) is connected to adjacent components through the connectors; the telescopic jib main body (10) is applicable to at least model I and model II, and the working conditions of applying the telescopic jib main body (10) for model I and model II are different, wherein the maximum rated lifting capacities of model I and model II are different.

2. The telescopic boom of the lifting equipment according to claim 1, characterized in that, Further comprising: A pull plate support component, arranged on one side of the telescopic jib main body (10), and the pull plate support component has at least two pull plate pitches to adapt to different working conditions of the lifting equipment of at least two models.

3. The telescopic boom of the lifting equipment according to claim 2, characterized in that, The pull plate support component comprises at least two pairs of pull plate support components, and each pair of pull plate support components comprises two pull plate supports, and the two pull plate supports are arranged at intervals along the width direction of the telescopic jib main body (10).

4. The telescopic boom of the lifting device according to claim 3, characterized in that, Each pull plate support comprises a plurality of pull plate support bodies (20), and the plurality of pull plate support bodies (20) are arranged at intervals along the length direction of the telescopic jib main body (10). The pull plate support body (20) is provided with a clamping groove, and the pull plate is clamped in the clamping groove of the pull plate support body (20).

5. The telescopic boom of the lifting device according to claim 4, characterized in that, At least one of the pull plate support bodies (20) in each pull plate support is provided with a locking member (21), and the locking member (21) is used for locking the pull plate to the pull plate support body (20).

6. The telescopic boom of the lifting device according to claim 4 or 5, characterized in that, The pull plate support body (20) is detachably connected to the telescopic jib main body (10).

7. The telescopic boom of the lifting equipment according to any one of claims 1 to 5, characterized in that The connector comprises a plurality of first connectors (30) and a plurality of second connectors (31), the plurality of first connectors (30) are arranged at intervals at one end of the telescopic jib main body (10), and the plurality of second connectors (31) are arranged at intervals at the other end of the telescopic jib main body (10).

8. The telescopic boom of the lifting device according to claim 7, characterized in that, One of the first connector (30) and the second connector (31) is a male connector, and the other of the first connector (30) and the second connector (31) is a female connector.

9. A lifting device, characterized in that, Comprising a lifting equipment main body and the telescopic jib according to any one of claims 1 to 8, and the lifting equipment main body is connected to the telescopic jib.

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