Jib and Crane

Abstract

The present invention provides a boom and a crane, relating to the technical field of construction machinery. The mast includes an upper boom, a lower boom, and an intermediate boom; the upper boom includes a main chord tube and a plurality of web tubes connected to the main chord tube. At the end of the upper boom far from the lower boom, a first guide pulley set, a second guide pulley set, and a luffing pulley set are provided. A triangular area is formed in the vertical plane by the first guide pulley set, the second guide pulley set, and the luffing pulley set. The outermost web tube among the plurality of web tubes is located within the triangular area; at the end of the lower boom far from the upper boom, a third guide pulley set is provided. The crane includes a boom. Through this boom, the technical problem in the prior art that it is necessary to purchase booms for fixed jib working conditions and booms for luffing jib working conditions to meet different lifting requirements, thereby increasing the vehicle purchase cost, is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of construction machinery, and more particularly to a boom and a crane. Background Art

[0002] A crane refers to a multi-action hoisting machine that vertically lifts and horizontally transports heavy objects within a certain range. A crane is also known as an overhead crane, a gantry crane or a hoist.

[0003] Currently, there are more and more hoisting operations for ultra-large equipment weighing thousands of tons, and the working site environment is becoming more and more complex. One piece of equipment needs to perform hoisting operations under various working conditions. Therefore, it is necessary to purchase booms for fixed jib conditions and booms for luffing jib conditions to meet different hoisting requirements, resulting in an increase in vehicle purchase costs.

[0004] Therefore, on the basis of traditional fixed jibs, it is necessary to design a boom that can meet the requirements of luffing jib conditions. Summary of the Invention

[0005] The purpose of the present invention is to provide a boom and a crane to alleviate the technical problem in the prior art that it is necessary to purchase booms for fixed jib conditions and booms for luffing jib conditions to meet different hoisting requirements, resulting in an increase in vehicle purchase costs.

[0006] In a first aspect, an embodiment of the present invention provides a boom, including: an upper boom section, a lower boom section, and an intermediate boom connected between the upper boom section and the lower boom section.

[0007] The upper boom section includes a main chord tube and a plurality of web tubes connected to the main chord tube. At the end of the upper boom section far from the lower boom section, a first guide pulley set, a second guide pulley set, and a luffing pulley set are provided. The first guide pulley set, the second guide pulley set, and the luffing pulley set form a triangular area in the vertical plane, and the outermost web tube among the plurality of web tubes is located within the triangular area.

[0008] At the end of the lower boom section far from the upper boom section, a third guide pulley set is provided for guiding the hoisting wire rope and / or the auxiliary luffing wire rope.

[0009] Further, the luffing pulley set is connected to the main chord tube through a pulley shaft; a strengthening structure is provided between the pulley shaft and the outermost web tube.

[0010] Further, the strengthening structure includes a reinforcing rib, and the reinforcing rib is connected between the pulley shaft and the outermost web tube.

[0011] Further, the reinforcing rib is welded between the pulley shaft and the outermost web tube; alternatively, one end of the reinforcing rib is fixedly sleeved on the pulley shaft, and the other end is fixedly connected to the outermost web tube.

[0012] Furthermore, there are two reinforcing ribs, and the two reinforcing ribs are arranged at intervals along the axial direction of the pulley shaft.

[0013] Furthermore, the reinforcing structure further includes a reinforcing bracket, and the reinforcing bracket is fixedly connected to the reinforcing rib.

[0014] Furthermore, the reinforcing rib includes a shaft hole for sleeving the pulley shaft; a partial hole wall of the shaft hole protrudes from the pulley shaft and extends radially outward along the shaft hole, and is fixedly connected to the reinforcing bracket.

[0015] Furthermore, the first guiding pulley group includes a plurality of first guiding pulleys, and the second guiding pulley group includes a second guiding pulley.

[0016] The luffing pulley group includes a plurality of luffing pulleys.

[0017] The sum of the numbers of the first guiding pulley and the second guiding pulley is adapted to the number of the luffing pulleys.

[0018] Furthermore, the third guiding pulley group includes a third guiding pulley, a fourth guiding pulley and a fifth guiding pulley which are not collinear.

[0019] Beneficial effects:

[0020] For the boom provided by the present invention, a first guiding pulley group, a second guiding pulley group and a luffing pulley group are provided at the end of the upper boom away from the lower boom. At the same time, a third guiding pulley group is provided at the end of the lower boom away from the upper boom; wherein, the setting of the third guiding pulley group can meet the wire winding requirements under the use conditions of the fixed auxiliary boom, and the settings of the first guiding pulley group, the second guiding pulley group, the luffing pulley group and the third guiding pulley group can meet the wire winding requirements under the use conditions of the luffing auxiliary boom; furthermore, the first guiding pulley group, the second guiding pulley group and the luffing pulley group form a triangular area in the vertical plane, and the outermost ventral tube among the multiple ventral tubes is located within the triangular area. Since the outermost ventral tube is located within the triangular area and will not contact the wire winding, on the premise of meeting the wire winding between the first guiding pulley group and the luffing pulley group and the wire winding between the second guiding pulley group and the luffing pulley group, the wire winding can be avoided from the outermost ventral tube to prevent the wire winding from interfering with the outermost ventral tube.

[0021] The boom provided by the present invention can be improved by modifying the traditional fixed auxiliary boom, that is, on the basis of the traditional fixed auxiliary boom, a first guiding pulley group, a second guiding pulley group, a luffing pulley group and a third guiding pulley group with the above position relationship can be added, so that it can not only meet the wire winding requirements under the use conditions of the fixed auxiliary boom, but also meet the wire winding requirements under the use conditions of the luffing auxiliary boom, thereby reducing the vehicle purchase cost.

[0022] In a second aspect, an embodiment of the present invention provides a crane, including: the aforementioned boom.

[0023] Beneficial effects:

[0024] The crane provided by the present invention includes the aforementioned boom. Therefore, the technical advantages and effects achieved by this crane also include those achieved by the boom, which will not be elaborated here. Description of the drawings

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of the boom provided by an embodiment of the present invention;

[0027] Figure 2 It is a front view of the boom provided by an embodiment of the present invention;

[0028] Figure 3 It is a top view of the boom provided by an embodiment of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the upper boom section in the boom provided by an embodiment of the present invention;

[0030] Figure 5 It is a top view of the upper boom section in the boom provided by an embodiment of the present invention;

[0031] Figure 6 It is a front view of the upper boom section in the boom provided by an embodiment of the present invention;

[0032] Figure 7 It is a schematic structural diagram of the lower boom section in the boom provided by an embodiment of the present invention;

[0033] Figure 8 It is a top view of the lower boom section in the boom provided by an embodiment of the present invention.

[0034] Reference numerals:

[0035] 100 - upper boom section; 110 - main chord tube; 120 - outermost web tube;

[0036] 200 - lower boom section;

[0037] 300 - intermediate boom;

[0038] 400 - first guide pulley set;

[0039] 500 - Second guiding pulley set;

[0040] 600 - Luffing pulley set; 610 - Pulley shaft;

[0041] 710 - Third guiding pulley; 720 - Fourth guiding pulley; 730 - Fifth guiding pulley;

[0042] 810 - Reinforcing rib; 820 - Reinforcing bracket. Detailed implementation manners

[0043] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0045] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0046] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. It is only for the convenience of describing the present invention 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 of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0047] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0048] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "arrangement", "installation", "connection", and "coupling" 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, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] The following will describe in detail some embodiments of the present invention with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0050] This embodiment provides a boom, as Figures 1 to 8 shown. The boom includes an upper boom section 100, a lower boom section 200, and an intermediate boom 300 connected between the upper boom section 100 and the lower boom section 200; the upper boom section 100 includes a main chord tube 110 and a plurality of web tubes connected to the main chord tube 110. At the end of the upper boom section 100 away from the lower boom section 200, a first guide pulley set 400, a second guide pulley set 500, and a luffing pulley set 600 are provided. The first guide pulley set, the second guide pulley set, and the luffing pulley set form a triangular area in the vertical plane, and the outermost web tube 120 among the plurality of web tubes is located within the triangular area; at the end of the lower boom section 200 away from the upper boom section 100, a third guide pulley set is provided for guiding the hoisting wire rope and / or the auxiliary luffing wire rope.

[0051] For the boom provided in this embodiment, a first guide pulley set 400, a second guide pulley set 500, and a luffing pulley set 600 are provided at the end of the upper boom section 100 away from the lower boom section 200. At the same time, a third guide pulley set is provided at the end of the lower boom section 200 away from the upper boom section 100. Among them, the setting of the third guide pulley set can meet the wire winding requirements under the working conditions of using a fixed auxiliary boom, and the settings of the first guide pulley set 400, the second guide pulley set 500, the luffing pulley set 600, and the third guide pulley set can meet the wire winding requirements under the working conditions of using a luffing auxiliary boom; furthermore, the first guide pulley set 400, the second guide pulley set 500, and the luffing pulley set 600 form a triangular area in the vertical plane, and the outermost web tube 120 among the plurality of web tubes is located within the formed triangular area. Since the outermost web tube 120 is located within the triangular area and will not contact the wire winding, this setting can avoid the wire winding from contacting the outermost web tube 120 on the premise of meeting the wire winding between the first guide pulley set 400 and the luffing pulley set 600 and the wire winding between the second guide pulley set 500 and the luffing pulley set 600, so as to avoid interference between the wire winding and the outermost web tube 120.

[0052] The boom provided in this embodiment can be improved by modifying the traditional fixed auxiliary boom. That is, on the basis of the traditional fixed auxiliary boom, a first guiding pulley group 400, a second guiding pulley group 500, a luffing pulley group 600 and a third guiding pulley group with the above position relationship can be added, so that it can not only meet the wire winding requirements of the traditional fixed auxiliary boom during its working conditions, but also meet the wire winding requirements of the boom during the working conditions of the luffing auxiliary boom, thus reducing the vehicle purchase cost.

[0053] The specific structures of the upper boom 100, the lower boom 200 and the intermediate boom 300 can refer to the main steel frame parts of the fixed auxiliary boom or the luffing auxiliary boom in the prior art.

[0054] Refer to Figure 4 , in this embodiment, the luffing pulley group 600 is connected to the main chord tube 110 through a pulley shaft 610; a strengthening structure is provided between the pulley shaft 610 and the outermost end web tube 120.

[0055] Specifically, the main chord tubes 110 can be set as two groups arranged oppositely, and two main chord tubes 110 are arranged in each group. Among them, the outermost end web tubes 120 are set as two upper and lower ones, and one pulley shaft 610 is correspondingly arranged for each outermost end web tube 120, and both ends of each pulley shaft 610 are connected between two main chord tubes 110 in different groups.

[0056] Optionally, the strengthening structure includes a strengthening rib 810, and the strengthening rib 810 is connected between the pulley shaft 610 and the outermost end web tube 120 to improve the local rigidity of the pulley shaft 610.

[0057] In some embodiments, the strengthening rib 810 is welded between the pulley shaft 610 and the outermost end web tube 120.

[0058] In other embodiments, refer to Figure 4 or Figure 5 , one end of the strengthening rib 810 is fixedly sleeved on the pulley shaft 610, and the other end is fixedly connected to the outermost end web tube 120.

[0059] Refer to Figure 5 , in this embodiment, there are two strengthening ribs 810, and the two strengthening ribs 810 are arranged at intervals along the axial direction perpendicular to the pulley shaft 610.

[0060] It should be noted that the number of the strengthening ribs 810 is not limited to two, and can also be three, four, etc. Of course, as long as the number that can meet the design requirements is within the protection scope of the present invention. In addition, the interval distance between adjacent strengthening ribs 810 can also be not limited.

[0061] Furthermore, refer to Figure 4 or Figure 6 , the strengthening structure further includes a strengthening bracket 820, and the strengthening bracket 820 is fixedly connected to the pulley shaft 610 or the strengthening rib 810.

[0062] When the strengthening bracket 820 is fixedly connected to the pulley shaft 610, specifically, the strengthening bracket 820 includes a first connection end and a second connection end. The first connection end is fixedly connected to one shaft end of the pulley shaft 610, and the second connection end is fixedly connected to the other shaft end of the pulley shaft 610; the luffing pulley block 600 is located between the first connection end and the second connection end.

[0063] When the strengthening bracket 820 is fixedly connected to the strengthening rib 810, specifically, the strengthening rib 810 includes a shaft hole for sleeving the pulley shaft 610; a part of the hole wall of the shaft hole protrudes from the pulley shaft 610 and extends radially outward along the shaft hole, and is fixedly connected to the strengthening bracket 820.

[0064] Through the cooperation of both the strengthening rib 810 and the strengthening bracket 820, the bending stress of the pulley shaft 610 can be reduced.

[0065] On the basis of the above embodiments, the first guiding pulley block 400 includes a plurality of first guiding pulleys, the second guiding pulley block 500 includes a second guiding pulley; the luffing pulley block 600 includes a plurality of luffing pulleys; wherein, the sum of the number of the first guiding pulley and the second guiding pulley is adapted to the number of the luffing pulleys. This setting can make the number of both the first guiding pulley and the second guiding pulley match the number of the luffing pulleys, so as to meet the wire winding requirements between the first guiding pulley and the second guiding pulley and the luffing pulleys respectively. Of course, the sum of the number of the first guiding pulley and the second guiding pulley can be slightly more than or slightly less than or equal to the number of the luffing pulleys.

[0066] Wherein, the number of the first guiding pulleys is matched with some of the luffing pulley blocks to prevent the steel wire rope from interfering with the outermost abdominal tube 120 when the front and rear masts are at a large angle.

[0067] In some specific embodiments, referring to Figure 7 or Figure 8 , the third guiding pulley block includes a third guiding pulley 710, a fourth guiding pulley 720 and a fifth guiding pulley 730, and the third guiding pulley 710, the fourth guiding pulley 720 and the fifth guiding pulley 730 are not collinear.

[0068] In a wire winding mode, after the auxiliary luffing steel wire rope comes out of the winch, it passes through the fifth guiding pulley 730 to complete the first turn of the steel wire rope, then passes through the second guiding pulley to complete the second turn, and finally reaches the luffing pulley to realize the wire winding operation of the auxiliary luffing steel wire rope.

[0069] This embodiment provides a crane, which includes the boom in the foregoing embodiment. The crane provided in this embodiment includes the aforementioned boom. Thus, the technical advantages and effects achieved by this crane also include those achieved by the boom, which will not be elaborated here.

[0070] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; 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 recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A boom, characterized in that, it comprises: an upper boom section (100), a lower boom section (200), and an intermediate boom (300) connected between the upper boom section (100) and the lower boom section (200); the upper boom section (100) comprises a main chord tube (110) and a plurality of web tubes connected to the main chord tube (110). At the end of the upper boom section (100) far from the lower boom section (200), a first guide pulley set (400), a second guide pulley set (500), and a luffing pulley set (600) are provided. The first guide pulley set (400), the second guide pulley set (500), and the luffing pulley set (600) form a triangular area in the vertical plane, and the outermost web tube (120) among the plurality of web tubes is located within the triangular area; at the end of the lower boom section (200) far from the upper boom section (100), a third guide pulley set is provided for guiding the hoisting wire rope and / or the auxiliary luffing wire rope, so as to meet the wire winding requirements for both the working conditions of using a fixed auxiliary boom and the working conditions of using a luffing auxiliary boom; the luffing pulley set (600) is connected to the main chord tube (110) through a pulley shaft (610); the first guide pulley set (400) comprises a plurality of first guide pulleys, the second guide pulley set (500) comprises one second guide pulley; the luffing pulley set (600) comprises a plurality of luffing pulleys; the sum of the number of the first guide pulleys and the second guide pulley is adapted to the number of the luffing pulleys; the third guide pulley set comprises a third guide pulley (710), a fourth guide pulley (720), and a fifth guide pulley (730) which are arranged non - collinearly.

2. The boom according to claim 1, characterized in that, a strengthening structure is provided between the pulley shaft (610) and the outermost web tube (120).

3. The boom according to claim 2, characterized in that, the strengthening structure comprises a strengthening rib (810), and the strengthening rib (810) is connected between the pulley shaft (610) and the outermost web tube (120).

4. The boom according to claim 3, characterized in that, the strengthening rib (810) is welded between the pulley shaft (610) and the outermost web tube (120); or, one end of the strengthening rib (810) is fixedly sleeved on the pulley shaft (610), and the other end is fixedly connected to the outermost web tube (120).

5. The boom according to claim 4, characterized in that, there are two strengthening ribs (810), and the two strengthening ribs (810) are arranged at intervals along the axial direction of the pulley shaft (610).

6. The boom according to claim 3, characterized in that, the strengthening structure further comprises a strengthening bracket (820), and the strengthening bracket (820) is fixedly connected to the strengthening rib (810).

7. The boom according to claim 6, characterized in that, the strengthening rib (810) comprises a shaft hole for sleeving the pulley shaft (610); A part of the hole wall of the shaft hole protrudes from the pulley shaft (610) and extends radially outward along the shaft hole, and is fixedly connected to the reinforcing bracket (820).

8. A crane characterized in that it comprises the boom according to any one of claims 1-7.

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