Cargo boom and engineering machinery

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a cargo boom and engineering machinery, an arm support assembly comprises a main arm and an auxiliary arm which are detachably connected, a supporting rod comprises a first supporting section and a second supporting section which are detachably connected in sequence in the length direction, and one end, deviating from the second supporting section, of the first supporting section is connected to the main arm or the auxiliary arm. The pulling plate assembly comprises a first pulling plate and a second pulling plate, the first end of the first pulling plate and the first end of the second pulling plate are connected to the main arm and the auxiliary arm respectively, and the second end of the first pulling plate and the second end of the second pulling plate are connected with the end, away from the first supporting section, of the second supporting section. Under the working condition of a boom system, the requirement for the length of the supporting rod is generally high, if the supporting rod is applied to the boom system, the length of any supporting section can be adjusted to increase the overall length of the supporting rod, the requirement of the boom system for the length of the supporting rod is met, and the supporting rod is good in universality and convenient to use. And the barrier between the working condition of a shield system and the working condition of a tower arm system is broken.

Description

TECHNICAL FIELD

[0001] The utility model belongs to engineering machinery technical field, and concretely relates to a hoisting arm and engineering machinery. BACKGROUND

[0002] In prior art, whether it is a tower arm hoisting system or a shield hoisting system, a supporting rod, a pull plate and a sub-arm part are needed to form a force triangle to bear the axial tension of the sub-arm part caused by hoisting heavy objects. However, in the process of using the hoisting arm, the supporting rod in the tower arm hoisting system and the shield hoisting system needs to be separately manufactured, and the supporting rod cannot be used universally between the tower arm hoisting system and the shield hoisting system, which has the problem of poor universality of the supporting rod. SUMMARY

[0003] The utility model aims at providing a hoisting arm and engineering machinery, and solves the technical problem of poor universality of the supporting rod in prior art.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a hoisting arm, which comprises:

[0005] An arm support assembly comprising a main arm and a sub-arm which are detachably connected;

[0006] A supporting rod comprising a first supporting section and a second supporting section which are detachably connected in sequence along the length direction, and one end of the first supporting section away from the second supporting section is connected to the sub-arm or the main arm;

[0007] A pull plate assembly comprising a first pull plate and a second pull plate, and the first ends of the first pull plate and the second pull plate are connected to the main arm and the sub-arm respectively, and the second ends of the first pull plate and the second pull plate are connected to one end of the second supporting section away from the first supporting section.

[0008] In the embodiment of the utility model, the cross sections of the first supporting section and the second supporting section are isosceles triangles, and the top angles on the first supporting section and the second supporting section are arranged away from each other, and the angle range of the top angle is 26°-30°.

[0009] In the embodiment of the utility model, the first supporting section and the second supporting section each comprise a connecting rod and supporting parts connected to both ends of the connecting rod in the length direction, each supporting part comprises a first supporting rod, a second supporting rod and a third supporting rod, the lengths of the first supporting rod and the second supporting rod are equal and together with the third supporting rod form an isosceles triangle.

[0010] In the embodiment of the utility model, in the first supporting section, an inclined reinforcing rod is arranged between each supporting part and the connecting rod.

[0011] In the embodiment of the utility model, in each supporting section, the distance between the projections of the two supporting parts on the horizontal plane is arranged to be gradually reduced in the direction towards the pull plate.

[0012] In the embodiment of the utility model, the intermediate section is detachably connected between the first support section and the second support section, and the projection width of the intermediate section on the horizontal plane is arranged to taper in the direction towards the pull plate.

[0013] In the embodiment of the utility model, the boom assembly further comprises a mounting shaft arranged at the end of the second support section away from the first support section, the two ends of the mounting shaft are connected to the two support portions, a plurality of first guide wheels are coaxially arranged on the mounting shaft along the length direction, and the first guide wheels are used for hanging the luffing rope.

[0014] In the embodiment of the utility model, the boom further comprises a secondary support rod, the secondary support rod and the support rod are detachably mounted on the primary arm and the secondary arm respectively, the secondary support rod is provided with a second guide wheel, the luffing rope is sequentially arranged around the outer circumferences of the first guide wheel and the second guide wheel, and the secondary support rod and the support rod can be adjusted in luffing through the luffing rope.

[0015] In the embodiment of the utility model, the boom assembly further comprises a transition piece, the transition piece is mounted on the side of the primary arm towards the secondary arm, and the transition piece is connected with the support rod.

[0016] In the embodiment of the utility model, an engineering machinery is provided, which comprises the boom as described above.

[0017] Through the above technical scheme, the boom and the engineering machinery provided by the embodiment of the utility model have the following beneficial effects:

[0018] The boom in the embodiment comprises a boom assembly, a support rod and a pull plate assembly. The boom assembly comprises a primary arm and a secondary arm which are detachably connected, the support rod comprises a first support section and a second support section which are detachably connected in sequence along the length direction, and one end of the first support section away from the second support section is connected to the primary arm or the secondary arm. The pull plate assembly comprises a first pull plate and a second pull plate, the first ends of the first pull plate and the second pull plate are respectively connected to the primary arm and the secondary arm, and the second ends of the first pull plate and the second pull plate are connected to one end of the second support section away from the first support section. In the application, the support rod is divided into the first support section and the second support section which are detachably connected, so that the two-section support rod can be used between the boom system and the shield system. Specifically, the length requirement of the support rod is usually high under the boom system working condition, if the first support section and the second support section under the shield system working condition are applied in the boom system, the length of any support section can be adjusted to increase the overall length of the support rod, so as to meet the length requirement of the support rod of the boom system. Therefore, the universality of the support rod in the application is good, and the barrier between the shield system working condition and the tower arm system working condition is broken.

[0019] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings are included to provide a further understanding of the embodiments of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and serve to explain the principles of the present application, but are not intended to limit the present application. Other embodiments of the present application can be derived from the structure shown in the drawings by those skilled in the art without creative effort, and the drawings are included in the present specification. In the drawings:

[0021] Figure 1 is a lifting arm under the tower arm system working condition according to the present application;

[0022] Figure 2 is a lifting arm under the shield arm system working condition according to the present application;

[0023] Figure 3 is a structural schematic view of a support rod according to an embodiment of the present application;

[0024] Figure 4 is a top view of a support rod according to the present application;

[0025] Figure 5 is a structural schematic view of a support rod according to another embodiment of the present application;

[0026] Figure 6 is a partial enlarged schematic view under the shield arm system working condition according to the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS

[0028] 11 main arm 2213 third support rod

[0029] 12 sub-arm 222 connecting rod

[0030] 13 mounting shaft 23 first guide wheel

[0031] 2 support rod 31 first pull plate

[0032] 21 first support section 32 second pull plate

[0033] 211 reinforcing rod 4 middle section

[0034] 22 second support section 5 sub-support rod

[0035] 221 support part 51 second guide wheel

[0036] 2211 first support rod 6 luffing rope

[0037] 2212 second support rod 7 mounting seat DETAILED DESCRIPTION

[0038] 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.

[0039] A lifting arm and a construction machine according to the present application are described below with reference to the accompanying drawings.

[0040] As shown in the figure, Figure 2 In the present embodiment, a lifting arm is proposed, which comprises an arm support assembly, a support rod 2 and a pull plate assembly. The arm support assembly comprises a main arm 11 and a sub-arm 12 which are detachably connected, the support rod 2 comprises a first support section 21 and a second support section 22 which are sequentially detachably connected along the length direction, and one end of the first support section 21 away from the second support section 22 is connected to the main arm 11 or the sub-arm 12. The pull plate assembly comprises a first pull plate 31 and a second pull plate 32, the first ends of the first pull plate 31 and the second pull plate 32 are respectively connected to the main arm 11 and the sub-arm 12, and the second ends of the first pull plate 31 and the second pull plate 32 are connected to one end of the second support section 22 away from the first support section 21. In the present application, by adopting the technical means of dividing the support rod 2 into the first support section 21 and the second support section 22 which are detachably connected, different components can be connected between the first support section 21 and the second support section 22 or the two sections are directly connected according to different working condition requirements, so that the two-section support rod 2 can be used between the arm support system and the shield system. Specifically, the length requirement of the support rod 2 is usually high under the arm support system working condition, if the first support section 21 and the second support section 22 originally used under the shield system working condition are applied in the arm support system, the length of at least one support section can be adjusted or a support member is added between the first support section 21 and the second support section 22 to increase the overall length of the support rod 2, so as to meet the length requirement of the support rod 2 for the arm support system. As can be seen, the versatility of the support rod 2 in the present application is good, and the barrier that the support rod 2 cannot be used between the shield system working condition and the tower arm system working condition is broken. In addition, from the perspective of cost, the support rod in the present embodiment can be used between the shield system working condition and the tower arm system working condition, effectively reducing the procurement cost of the support rod, and there is no need to purchase two specifications of support rods in batches.

[0041] As shown in the figure, Figure 3 In the present embodiment, the cross sections of the first support section 21 and the second support section 22 are isosceles triangles, and the support stability is good. The top angles on the first support section 21 and the second support section 22 are arranged away from each other, and the angle range of the top angle is 26°-30°. If the angle of the top angle is selected within this range, the first support section 21 and the second support section 22 can have good structural stability.

[0042] As shown in the figure, Figure 4As shown, in the embodiment, the first support section 21 and the second support section 22 each include a connecting rod 222 and a support portion 221 connected to both ends of the connecting rod 222 in the length direction, and each support portion 221 includes a first support rod 2211, a second support rod 2212, and a third support rod 2213, the lengths of the first support rod 2211 and the second support rod 2212 are equal and together with the third support rod 2213 form an isosceles triangle. The number of connecting rods 222 in the first support section 21 and the second support section 22 is two, and the two connecting rods 222 are respectively connected to the first support rod 2211 and the second support rod 2212, and the support stability is good. Specifically, the first support section 21 and the second support section 22 can be detachably connected through a pin shaft, and then the connecting portion of the first support section 21 and the second support section 22 is reinforced by welding, thereby improving the installation stability of the first support section 21 and the second support section 22.

[0043] As shown in FIG. 1, Figure 4 As shown, in the embodiment, in the first support section 21, an inclined reinforcing rod 211 is arranged between each support portion 221 and the connecting rod 222, and the arrangement of the reinforcing rod 211 can effectively improve the structural stability of the first support section 21. Further, a plurality of cross-arranged reinforcing members are arranged between the reinforcing rod 211 and the support portion 221, which can further improve the overall structural stability of the first support section 21. Similarly, in the second support section 22, a plurality of cross-arranged reinforcing members are also arranged between the two support portions 221, which can improve the overall structural stability of the second support section 22. Therefore, the first support section 21 and the second support section 22 each have a truss structure, which has the advantages of light weight and high support stability.

[0044] In the embodiment, in each support section, the distance between the projections of the two support portions 221 on the horizontal plane is gradually reduced in the direction towards the pull plate. Specifically, Figure 4 FIG. 2 is a top view of the support rod 2 in the embodiment, in which the projections of the two support portions 221 on the horizontal plane can be seen. The first support section 21 and the second support section 22 are both tapered in the direction towards the pull plate, and the force of the pull plate on the support rod 2 will act on the side of the support rod 2 close to the main arm 11 or the auxiliary arm 12. With such a tapered arrangement, the overall support stability of the support rod 2 is good.

[0045] As shown in FIG. 1, Figure 3 and Figure 4 As shown, this is an embodiment of the support rod 2 applied to the working condition of a shield system, and the boom assembly further includes a mounting shaft 13 arranged at the end of the second support section 22 away from the first support section 21, both ends of the mounting shaft 13 are connected to the two support portions 221, a plurality of first guide wheels 23 are coaxially arranged on the mounting shaft 13 in the length direction, the first guide wheels 23 are used to hang the luffing rope 6, and the pressure of the auxiliary arm 12 hoisting the load is shared through the luffing rope 6.

[0046] As shown in Figure 5 , it is another embodiment of the application of the strut 2 in the tower arm system working condition, which usually has higher requirements for the length of the strut 2. One embodiment can replace at least one of the first support section 21 and the second support section 22 with a support section of other length specifications to meet the length requirements of the strut 2 in the tower arm system working condition. Another embodiment can detachably connect the intermediate section 4 between the first support section 21 and the second support section 22, and the projection width of the intermediate section 4 on the horizontal plane is arranged to gradually shrink in the direction towards the pull plate, so that the force of the pull plate on the strut 2 will act on the side of the strut 2 close to the main arm 11 or the auxiliary arm 12, thereby improving the overall support stability of the strut 2, and also meeting the length requirements of the strut 2 in the tower arm system working condition.

[0047] As shown in Figure 1 , in this embodiment, in the tower arm system working condition, the crane boom further comprises an auxiliary strut 5, the auxiliary strut 5 and the strut 2 are detachably installed on the main arm 11 and the auxiliary arm 12 respectively, the end of the auxiliary strut 5 away from the main arm 11 or away from the auxiliary arm 12 is provided with a second guide wheel 51, the luffing rope 6 is wound around the outer periphery of the first guide wheel 23 and the second guide wheel 51 in sequence, and the auxiliary strut 5 and the strut 2 can be adjusted in luffing through the luffing rope 6. At this time, in order to ensure the structural stability of the crane boom as a whole, the auxiliary strut 5 is an integrally formed piece, and the distance between the auxiliary strut 5 and the strut 2 can be adjusted by adjusting the length of the luffing rope 6, so as to ensure good lifting effect of the crane boom.

[0048] Taking the connection of the strut 2 to the auxiliary arm 12 as an example, one end of the first pull plate 31 is connected to the auxiliary arm 12, the other end of the first pull plate 31 is connected to the strut 2, and the first pull plate 31, the strut 2 and the auxiliary arm 12 together form a force triangle to bear the axial force of the hoisted load on the auxiliary arm 12. At this time, the strut 2 bears the bending moment of the first pull plate 31.

[0049] Further, in the tower arm system working condition, the auxiliary strut 5 is also provided, and the luffing rope 6, the strut 2 and the auxiliary strut 5 together form a force triangle, in which the force on the strut 2 is complex and variable, and the auxiliary strut 5 can share part of the force borne by the strut 2, so as to improve the upper limit of the hoisted load of the crane boom.

[0050] In addition, as shown in Figure 1 , in the tower arm system working condition, the length of the strut 2 is usually required to be set longer, at this time, the intermediate section 4 can be installed between the first support section 21 and the second support section 22 to meet the length requirements of the strut 2. Of course, the strut 2 can also be composed of only the first support section 21 and the second support section 22, and only the length of the first support section 21 and the second support section 22 needs to be adjusted as needed.

[0051] In the shield system working condition, in order to ensure the stability of the hoisting of the shield system, the length of the support rod 2 is usually set to be short. Thus, as shown in the figure, the support rod 2 can include only the first support section 21 and the second support section 22. Any two of the first pull plate 31, the support rod 2 and the auxiliary arm 12 are rigidly connected to bear the axial force of the hoisting load on the auxiliary arm 12. It should be noted that, in either the tower arm system working condition or the shield system working condition, when the support rod 2 is composed of the first support section 21 and the second support section 22, preferably, the lengths of the first support section 21 and the second support section 22 are equal, so as to ensure that the connection between the first support section 21 and the second support section 22 is centered and the support stability of the support rod 2 as a whole is ensured. In summary, the support rod 2 of the embodiment has the advantages of light weight, high performance and good versatility, and can be compatible with the tower arm system working condition and the shield system working condition. Figure 2

[0052] As shown in the figure, the auxiliary arm 12 and the first support section 21 are connected at the mounting seat 7, which facilitates the stable connection of the first support section 21 to the auxiliary arm 12. In the embodiment, the boom assembly further includes a transition piece, which is installed on the side of the main arm 11 facing the auxiliary arm 12 and is connected with the support rod 2. The purpose of setting the transition piece is to enable the support rod 2 to be conveniently and stably connected to the main arm 11. Specifically, the transition piece can be provided as the mounting seat 7 as above, or other structures capable of stably mounting the transition piece can be adopted. Figure 6

[0053] In the embodiment, an engineering machine is provided, which includes the lifting arm as described above. Since the engineering machine adopts all the embodiments of the lifting arm, it also has all the beneficial effects brought by the lifting arm, which will not be described in detail here.

[0054] In the description of the utility model, it should be understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0055] ​​In the utility model, unless another definite provision and limit, the term " install " " link " " connect " " fixed " and so on term should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electric connection or each other can communicate;Can be direct link, also can pass through intermediate medium indirectly link, can be two element inside's intercommunication or two element's interaction relation, unless another definite limit.For the ordinary skill of the art, can understand the concrete meaning of above-mentioned term in the utility model according to specific circumstances.

[0056] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" 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 the present 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 one or more embodiments or examples in a suitable manner. Furthermore, the skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0057] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and the ordinary skilled in the art can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A load arm, characterized in that The crane boom comprises: an arm assembly comprising a main arm (11) and a sub-arm (12) connected detachably; a support rod (2) comprising a first support section (21) and a second support section (22) connected detachably in sequence along the length direction, one end of the first support section (21) being connected to the sub-arm (12) or the main arm (11) away from the second support section (22); a pull plate assembly comprising a first pull plate (31) and a second pull plate (32), the first ends of the first pull plate (31) and the second pull plate (32) being connected to the main arm (11) and the sub-arm (12) respectively, and the second ends of the first pull plate (31) and the second pull plate (32) being connected to one end of the second support section (22) away from the first support section (21).

2. A load arm according to claim 1, characterised in that The cross sections of the first support section (21) and the second support section (22) are isosceles triangles, and the top angles on the first support section (21) and the second support section (22) are arranged away from each other, and the angles of the top angles range from 26° to 30°.

3. A load arm according to claim 2, characterised in that, The first support section (21) and the second support section (22) each comprise a connecting rod (222) and a support part (221) connected to both ends of the connecting rod (222) in the length direction, each support part (221) comprises a first support rod (2211), a second support rod (2212) and a third support rod (2213), the lengths of the first support rod (2211) and the second support rod (2212) are equal and together with the third support rod (2213) form an isosceles triangle.

4. A load arm according to claim 3, characterised in that, In the first support section (21), an inclined reinforcing rod (211) is arranged between each support part (221) and the connecting rod (222).

5. A load arm according to claim 3, characterised in that, In each support section, the distance between the projections of the two support parts (221) on the horizontal plane is arranged to taper in the direction towards the pull plate.

6. A load arm according to claim 1, characterised in that The crane boom further comprises an intermediate section (4) detachably connected between the first support section (21) and the second support section (22), and the projection width of the intermediate section (4) on the horizontal plane is arranged to taper in the direction towards the pull plate.

7. A load arm according to claim 3, characterised in that The arm assembly further comprises a mounting shaft (13) arranged at the end of the second support section (22) away from the first support section (21), both ends of the mounting shaft (13) being connected to the two support parts (221), and a plurality of first guide wheels (23) are coaxially arranged on the mounting shaft (13) in the length direction, and the first guide wheels (23) are used for hanging a luffing rope (6).

8. A load arm according to claim 7, characterised in that, The crane boom further comprises a sub-support rod (5), the sub-support rod (5) and the support rod (2) are detachably mounted on the main arm (11) and the sub-arm (12) respectively, a second guide wheel (51) is arranged on the sub-support rod (5), the luffing rope (6) is wound around the outer peripheries of the first guide wheel (23) and the second guide wheel (51) in sequence, and the sub-support rod (5) and the support rod (2) can be adjusted in luffing through the luffing rope (6).

9. A load arm according to any one of claims 1 to 8, characterised in that, The arm assembly further comprises a transition piece mounted to one side of the main arm (11) towards the sub-arm (12), the transition piece being connected to the strut (2).

10. A working machine, characterized in that A load arm comprising any of the features of claims 1 to 9.

Images