Crane

Abstract

The utility model relates to the field of engineering machinery, and discloses a crane which comprises a main lifting system and an auxiliary lifting system, the main lifting system comprises a main lifting mechanism and a main lifting pulley block, and the main lifting pulley block comprises a first main supporting pulley and a main lifting pulley which are sequentially arranged at intervals in the longitudinal direction of a lifting arm; the main lifting mechanism comprises a main lifting rope which extends in the longitudinal direction and is wound on a first main supporting pulley and a main lifting pulley; the auxiliary lifting system comprises an auxiliary lifting mechanism and an auxiliary lifting pulley block which is arranged at an interval with the main lifting pulley block in the transverse direction of the cargo boom, and the auxiliary lifting pulley block comprises a first auxiliary supporting pulley and an auxiliary lifting pulley which are sequentially arranged at an interval in the longitudinal direction; the auxiliary lifting mechanism comprises an auxiliary lifting rope which extends in the longitudinal direction and is wound on the first auxiliary supporting pulley and the auxiliary lifting pulley. The crane can lift objects with small loads at a high lifting speed, so that the lifting efficiency can be improved, and the use cost of equipment is reduced.

Description

Technical Field

[0001] This application belongs to the technical field of construction machinery, and particularly relates to a crane. Background Art

[0002] At present, most luffing cranes in the industry are only equipped with one set of hoisting systems, especially luffing tower cranes. Compared with small-tonnage cranes, the hoisting systems of large-tonnage cranes have a slower rotation speed. If a large-tonnage crane is used to hoist goods with a relatively small weight, the hoisting efficiency will be reduced. Therefore, when facing working conditions with different loads, it is necessary to switch cranes of different tonnages to achieve the corresponding hoisting speed, but multiple cranes need to be equipped on-site, resulting in a high cost. Summary of the Invention

[0003] In view of at least one of the above-mentioned defects or deficiencies of the prior art, this application provides a crane that can hoist objects with a relatively small load at a relatively fast hoisting speed, thereby improving the hoisting efficiency and reducing the equipment usage cost.

[0004] To achieve the above object, this application provides a crane, including:

[0005] A main hoisting system, including a main hoisting mechanism and a main hoisting pulley block. The main hoisting pulley block includes a first main support pulley and a main hoisting pulley that are sequentially arranged at intervals along the longitudinal direction of the boom. The main hoisting mechanism includes a main hoisting rope that extends along the longitudinal direction and is wound around the first main support pulley and the main hoisting pulley; and

[0006] A secondary hoisting system, including a secondary hoisting mechanism and a secondary hoisting pulley block that is arranged at an interval from the main hoisting pulley block along the transverse direction of the boom. The secondary hoisting pulley block includes a first secondary support pulley and a secondary hoisting pulley that are sequentially arranged at intervals along the longitudinal direction. The secondary hoisting mechanism includes a secondary hoisting rope that extends along the longitudinal direction and is wound around the first secondary support pulley and the secondary hoisting pulley.

[0007] In some embodiments, the secondary hoisting mechanism is arranged on the internal web member of the main boom of the boom.

[0008] In some embodiments, the crane is a tower crane, and the main hoisting mechanism is arranged on the upper support of the tower crane.

[0009] In some embodiments, the main hoisting mechanism includes a mechanism mounting seat connected between the upper support of the tower crane and the counterweight boom.

[0010] In some embodiments, the first main support pulley is arranged on the top web member of the main boom of the boom, and the first secondary support pulley is arranged on the internal web member of the main boom.

[0011] In some embodiments, the main hoisting pulley and the auxiliary hoisting pulley are arranged at the head of the tip section of the boom at intervals along the longitudinal direction.

[0012] In some embodiments, the main hoisting pulley set further includes a second main support pulley disposed on the top web member of the tip section, and the main hoisting rope is sequentially wound around the first main support pulley, the second main support pulley, and the main hoisting pulley.

[0013] In some embodiments, the main hoisting system further includes a main hoisting weight limiter disposed in the tip section. The main hoisting weight limiter is located between the second main support pulley and the main hoisting pulley, and the main hoisting rope is sequentially wound around the first main support pulley, the second main support pulley, the main hoisting weight limiter, and the main hoisting pulley.

[0014] In some embodiments, the auxiliary hoisting pulley set further includes a second auxiliary support pulley disposed in the tip section, and the auxiliary hoisting rope is sequentially wound around the first auxiliary support pulley, the second auxiliary support pulley, and the auxiliary hoisting pulley.

[0015] In some embodiments, the auxiliary hoisting system further includes an auxiliary hoisting weight limiter disposed in the tip section. The auxiliary hoisting weight limiter is located between the second auxiliary support pulley and the auxiliary hoisting pulley, and the auxiliary hoisting rope is sequentially wound around the first auxiliary support pulley, the second auxiliary support pulley, the auxiliary hoisting weight limiter, and the auxiliary hoisting pulley.

[0016] By the above technical solutions, on the one hand, the crane of the present application can use the main hoisting system to lift heavy-tonnage goods, and on the other hand, it can use the auxiliary hoisting system to lift small-tonnage goods. And due to the fact that the rotation speed of the auxiliary hoisting mechanism is much greater than that of the main hoisting mechanism, the lifting speed of small-tonnage goods can be increased, and the lifting efficiency of small-tonnage goods can be improved. Especially for the working conditions of successively lifting goods with different tonnages, there is no need to additionally set up multiple cranes with different tonnages, so that the equipment usage cost can be effectively reduced.

[0017] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific embodiment part. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation to the embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts. In the drawings:

[0019] Figure 1 It is a partial schematic diagram of a crane in a specific embodiment of the present application;

[0020] Figure 2 is Figure 1 a schematic diagram of the boom of the crane in;

[0021] Figure 3 is Figure 1 a schematic diagram of the tip section of the boom of the crane, with the main hoist pulley block in the figure wound with a main hoist rope;

[0022] Figure 4 is Figure 1 a schematic diagram of the tip section of the boom of the crane, with the auxiliary hoist pulley block in the figure wound with an auxiliary hoist rope;

[0023] Figure 5 is Figure 1 a top view of the tip section of the boom of the crane.

[0024] Explanation of reference numerals

[0025] 1 Main hoisting mechanism 2 First main support pulley

[0026] 3 Main hoist pulley 4 Main hoist rope

[0027] 5 Auxiliary hoisting mechanism 6 First auxiliary support pulley

[0028] 7 Auxiliary hoist pulley 8 Auxiliary hoist rope

[0029] 9 Second main support pulley 10 Main load limiter

[0030] 11 Second auxiliary support pulley 12 Auxiliary load limiter

[0031] 13 Boom 14 Upper support

[0032] 15 Counterweight boom 16 Main hook

[0033] 17 Auxiliary hook 1301 Main boom

[0034] 1302 Tip section Specific embodiments

[0035] The following will describe in detail the specific embodiments of the present application with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present application, and are not used to limit the present application.

[0036] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0037] As Figures 1 to 5As shown, the present application provides a crane, which mainly includes a main hoisting system and a auxiliary hoisting system.

[0038] Among them, the main hoisting system includes a main hoisting mechanism 1 and a main hoisting pulley block. The main hoisting pulley block includes a first main support pulley 2 and a main hoisting pulley 3 that are sequentially arranged at intervals along the longitudinal direction of the boom 13 (i.e., the length direction of the boom 13). The main hoisting mechanism 1 includes a main hoisting rope 4 that extends along the longitudinal direction of the boom 13 and is wound around the first main support pulley 2 and the main hoisting pulley 3. In other words, under the guiding action of the first main support pulley 2 and the main hoisting pulley 3, the main hoisting rope 4 can be retracted and extended along the longitudinal direction of the boom 13.

[0039] The auxiliary hoisting system includes an auxiliary hoisting mechanism 5 and an auxiliary hoisting pulley block that is arranged at intervals from the main hoisting pulley block along the transverse direction of the boom 13 (i.e., the width direction of the boom 13). The auxiliary hoisting pulley block includes a first auxiliary support pulley 6 and an auxiliary hoisting pulley 7 that are sequentially arranged at intervals along the longitudinal direction of the boom 13. The auxiliary hoisting mechanism 5 includes an auxiliary hoisting rope 8 that extends along the longitudinal direction of the boom 13 and is wound around the first auxiliary support pulley 6 and the auxiliary hoisting pulley 7. In other words, under the guiding action of the first auxiliary support pulley 6 and the auxiliary hoisting pulley 7, the auxiliary hoisting rope 8 can also be retracted and extended along the longitudinal direction of the boom 13.

[0040] In the present exemplary embodiment, the main hoisting mechanism 1 and the auxiliary hoisting mechanism 5 can be winches. The main hoisting mechanism 1 and the auxiliary hoisting mechanism 5 work independently to respectively retract and extend the main hoisting rope 4 and the auxiliary hoisting rope 8, so as to lift different goods through the main hook 16 and the auxiliary hook 17. Since the load capacity of the main hoisting mechanism 1 is strong and the load capacity of the auxiliary hoisting mechanism 5 is weak, but the rotation speed of the auxiliary hoisting mechanism 5 can be greater than the rotation speed of the main hoisting mechanism 1. Therefore, on the one hand, the crane in the present exemplary embodiment can use the main hoisting system to lift large-tonnage goods, and on the other hand, it can use the auxiliary hoisting system to lift small-tonnage goods. And thanks to the rotation speed of the auxiliary hoisting mechanism 5 being much greater than the rotation speed of the main hoisting mechanism 1, the lifting speed of small-tonnage goods can be increased, and the lifting efficiency of small-tonnage goods can be improved. At the same time, the auxiliary hoisting mechanism 5 has a smaller power, which is more energy-saving and environmentally friendly. In addition, by reducing the use of the main hoisting mechanism 1, the service life of the main hoisting mechanism 1 can be effectively increased. For the working conditions of lifting goods with different tonnages successively, there is no need to additionally set up multiple cranes with different tonnages. Just using one crane of the present application can effectively reduce the equipment use cost.

[0041] It should be noted that referring to Figure 5 , the auxiliary hoisting pulley block and the main hoisting pulley block are arranged at intervals along the transverse direction of the boom 13, so that the main hoisting rope 4 and the auxiliary hoisting rope 8 can be arranged in parallel, thereby effectively avoiding the occurrence of the situation where the main and auxiliary hoisting ropes are twisted.

[0042] In an alternative or preferred embodiment, as Figure 1 and Figure 2 shown, the auxiliary hoisting mechanism 5 is arranged on the internal web members of the main boom 1301 of the boom 13, so as to save the layout space on the upper support 14 or the counter jib 15 and optimize the structural layout of the crane.

[0043] In an alternative or preferred embodiment, as Figure 1 shown, the crane is a tower crane, and the main hoisting mechanism 1 is arranged on the upper support 14 of the tower crane, so as to provide a stable working position for the main hoisting mechanism 1. Further, the main hoisting mechanism 1 includes a mechanism mounting seat (not shown in the drawings), and the mechanism mounting seat is connected between the upper support 14 and the counter jib 15 of the tower crane. Specifically, one end of the mechanism mounting seat is mounted on the counter jib 15, and the other end is mounted on the upper support 14. On the one hand, it can further save the space of the upper support 14, and on the other hand, it can strengthen the connection strength between the upper support 14 and the counter jib 15 and improve the overall structural stability of the crane.

[0044] It should be noted that the upper support 14 is the top platform of the tower crane, and the root section of the boom 13 is connected to the upper support 14 through a pin shaft, so that the boom 13 can achieve swing amplitude variation.

[0045] In an alternative or preferred embodiment, as Figure 2 shown, the first main support pulley 2 is arranged on the top web members of the main boom 1301 of the boom 13, and the first auxiliary support pulley 6 is arranged on the internal web members of the main boom 1301.

[0046] In an alternative or preferred embodiment, the main hoisting pulley 3 and the auxiliary hoisting pulley 7 are arranged at intervals along the longitudinal direction on the head of the tip section 1302 of the boom 13. In the Figure 3 embodiment shown, the auxiliary hoisting pulley 7 is arranged at the distal end of the head of the tip section 1302, and the main hoisting pulley 3 is arranged at the proximal end of the head of the tip section 1302, so as to further increase the spacing distance between the main hoisting rope 4 and the auxiliary hoisting rope 8 and effectively avoid the occurrence of the two ropes getting twisted. In other embodiments, the auxiliary hoisting pulley 7 can also be arranged at the proximal end of the head of the tip section 1302, and the main hoisting pulley 3 can be arranged at the distal end of the head of the tip section 1302. The present application does not make any limitation in this regard.

[0047] In an alternative or preferred embodiment, as Figure 3As shown, the three sets of main hoist pulleys further include a second main support pulley 9 disposed on the top web member of the boom tip section 1302. The main hoist rope 4 is sequentially wound around the first main support pulley 2, the second main support pulley 9, and the main hoist pulley 3. In this embodiment, by providing two main support pulleys, namely the first main support pulley 2 and the second main support pulley 9, the stability of the retracting and extending movement of the main hoist rope 4 can be improved.

[0048] In an alternative or preferred embodiment, as Figure 3 shown, the main hoist system further includes a main hoist weight limiter 10 disposed in the boom tip section 1302. The main hoist weight limiter 10 is located between the second main support pulley 9 and the main hoist pulley 3. The main hoist rope 4 is sequentially wound around the first main support pulley 2, the second main support pulley 9, the main hoist weight limiter 10, and the main hoist pulley 3. By providing the main hoist weight limiter 10 between the second main support pulley 9 and the main hoist pulley 3, the main hoist rope 4 can be partially pressed against the main hoist weight limiter 10 during the lifting operation, so that the main hoist weight limiter 10 can be used to detect the lifting weight of the main hoist rope 4, that is, to monitor the load condition of the equipment in real time. Once the detected load exceeds the set safety value, the system will automatically issue an alarm or stop the operation of the equipment, thereby avoiding equipment damage or accidents caused by overloading and improving safety.

[0049] In an alternative or preferred embodiment, as Figure 4 shown, the seven sets of auxiliary hoist pulleys further include a second auxiliary support pulley 11 disposed in the boom tip section 1302. The auxiliary hoist rope 8 is sequentially wound around the first auxiliary support pulley 6, the second auxiliary support pulley 11, and the auxiliary hoist pulley 7. In this embodiment, by providing two auxiliary support pulleys, namely the first auxiliary support pulley 6 and the second auxiliary support pulley 11, the stability of the retracting and extending movement of the auxiliary hoist rope 8 can be improved under their synchronous guidance.

[0050] In an alternative or preferred embodiment, as Figure 4 shown, the auxiliary hoist system further includes an auxiliary hoist weight limiter 12 disposed in the boom tip section 1302. The auxiliary hoist weight limiter 12 is located between the second auxiliary support pulley 11 and the auxiliary hoist pulley 7. The auxiliary hoist rope 8 is sequentially wound around the first auxiliary support pulley 6, the second auxiliary support pulley 11, the auxiliary hoist weight limiter 12, and the auxiliary hoist pulley 7. By providing the auxiliary hoist weight limiter 12 between the second auxiliary support pulley 11 and the auxiliary hoist pulley 7, the auxiliary hoist rope 8 can be partially pressed against the auxiliary hoist weight limiter 12 during the lifting operation, so that the auxiliary hoist weight limiter 12 can be used to detect the lifting weight of the auxiliary hoist rope 8, that is, to monitor the load condition of the equipment in real time. Once the detected load exceeds the set safety value, the system will automatically issue an alarm or stop the operation of the equipment, thereby avoiding equipment damage or accidents caused by overloading and improving safety.

[0051] In the description of the present application, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] In the present application, unless otherwise clearly defined and limited, terms such as "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0053] 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 present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A crane, characterized in that: include: A main lifting system comprises a main lifting mechanism (1) and a main lifting pulley block, wherein the main lifting pulley block comprises a first main support pulley (2) and a main lifting pulley (3) which are arranged in sequence and spaced apart in the longitudinal direction of a lifting arm (13), and the main lifting mechanism (1) comprises a main lifting rope (4) which extends in the longitudinal direction and is wound around the first main support pulley (2) and the main lifting pulley (3); and The auxiliary lifting system comprises an auxiliary lifting mechanism (5) and an auxiliary lifting pulley group arranged in a lateral direction of the lifting arm (13) and spaced apart from the main lifting pulley group, the auxiliary lifting pulley group comprising a first auxiliary supporting pulley (6) and an auxiliary lifting pulley (7) arranged in sequence in a longitudinal direction, and the auxiliary lifting mechanism (5) comprises an auxiliary lifting rope (8) extending in the longitudinal direction and wound around the first auxiliary supporting pulley (6) and the auxiliary lifting pulley (7).

2. The crane according to claim 1, characterized in that: The auxiliary lifting mechanism (5) is arranged on the inner web of the main arm (1301) of the lifting arm (13).

3. The crane according to claim 1, characterized in that: The crane is a tower crane, and the main lifting mechanism (1) is arranged on an upper support (14) of the tower crane.

4. The crane according to claim 3, characterized in that: The main lifting mechanism (1) comprises a mechanism mounting seat connected between an upper support (14) and a balance arm (15) of the tower crane.

5. The crane according to claim 1, characterized in that: The first main supporting pulley (2) is arranged on the top web of the main arm (1301) of the lifting arm (13), and the first secondary supporting pulley (6) is arranged on the inner web of the main arm (1301).

6. The crane according to claim 1, characterized in that: The main lifting pulley (3) and the auxiliary lifting pulley (7) are arranged at a distance from each other along the longitudinal direction at the head of the arm tip section (1302) of the lifting arm (13).

7. The crane according to claim 6, characterized in that The main lifting pulley (3) group also includes a second main support pulley (9) arranged on the top web of the arm tip section (1302), and the main lifting rope (4) is arranged to pass around the first main support pulley (2), the second main support pulley (9) and the main lifting pulley (3) in sequence.

8. The crane according to claim 7, characterized in that The main lifting system also includes a main lifting weight limiter (10) arranged in the arm tip section (1302), and the main lifting weight limiter (10) is located between the second main support pulley (9) and the main lifting pulley (3), and the main lifting rope (4) is arranged to pass around the first main support pulley (2), the second main support pulley (9), the main lifting weight limiter (10) and the main lifting pulley (3) in sequence.

9. The crane according to claim 6, characterized in that: The auxiliary lifting pulley (7) group also includes a second auxiliary supporting pulley (11) arranged in the arm tip section (1302), and the auxiliary lifting rope (8) is arranged to pass around the first auxiliary supporting pulley (6), the second auxiliary supporting pulley (11) and the auxiliary lifting pulley (7) in sequence.

10. The crane according to claim 9, characterized in that The auxiliary lifting system also includes an auxiliary lifting weight limiter (12) arranged in the arm tip section (1302), and the auxiliary lifting weight limiter (12) is located between the second auxiliary support pulley (11) and the auxiliary lifting pulley (7), and the auxiliary lifting rope (8) is arranged to bypass the first auxiliary support pulley (6), the second auxiliary support pulley (11), the auxiliary lifting weight limiter (12) and the auxiliary lifting pulley (7) in sequence.

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