A mast-assisted boom system, method and crane

Abstract

The application discloses a mast auxiliary pulling rod system, method and crane, and relates to the field of crane installation.The system comprises a crane main unit, a mast luffing device, a jacking pulling rod device and an auxiliary pulling rod device.The jacking pulling rod device is used for jacking and pulling the mast luffing device.The auxiliary pulling rod device comprises an auxiliary support, a telescopic driving element and a self-loading and unloading lifting appliance.The auxiliary support is arranged on the crane main unit and located at the front side of the mast luffing device.The telescopic driving element is arranged at the upper end of the mast luffing device.The two ends of the self-loading and unloading lifting appliance are respectively connected with the telescopic ends of the telescopic driving element and the auxiliary support in a one-to-one correspondence, so that the mast luffing device can be assisted to be pulled up under the condition that the telescopic ends of the telescopic driving element are retracted, and the pulling rod operation of the reinforced and lengthened mast luffing device can be completed, thereby enabling the reinforced and lengthened mast luffing device to meet the requirements of the longer and heavier arm frame, and achieving the purposes of simplifying the installation process of the mast system and reducing the transportation workload.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cranes, and particularly relates to a mast auxiliary jib system, method and crane. BACKGROUND

[0002] With the increasing demand for wind power construction, wind turbine hoisting is gradually developing towards large-scale, and the installation height is increasing, which puts higher requirements on the strength and length of the crane jib.

[0003] At present, the crane has two mast systems of standard working conditions and super-lifting working conditions for jib operation, but the existing mast system of standard working conditions is difficult to meet the jib operation requirements of long and heavy jib frames, and the mast system of super-lifting working conditions needs to be used to realize jib operation of long and heavy jib frames. However, the mast system of super-lifting working conditions needs to assemble super-lifting masts, super-lifting pulley blocks and super-lifting counterweight luffing mechanisms and other devices, which is complex in installation process and large in transportation workload. SUMMARY

[0004] In view of the above defects or deficiencies, the present application provides a mast auxiliary jib system, method and crane, aiming to solve the technical problems of complex installation process and large transportation workload caused by using the mast system of super-lifting working conditions for jib operation of long and heavy jib frames.

[0005] To achieve the above-mentioned purpose, the present application provides a mast auxiliary jib system, wherein the mast auxiliary jib system comprises a crane main unit, a mast luffing device, a jacking jib device and an auxiliary jib device; the mast luffing device is arranged on the crane main unit; the jacking jib device is arranged on the crane main unit and is used for jacking and jibbing the mast luffing device; the auxiliary jib device comprises an auxiliary support, an extension drive and a self-loading and unloading lifting appliance, the auxiliary support is arranged on the crane main unit and located at the front side of the mast luffing device, the extension drive is arranged at the upper end of the mast luffing device, and the two ends of the self-loading and unloading lifting appliance are respectively and one-to-one connected with the extension ends of the extension drive and the auxiliary support, so as to assist in jacking and jibbing the mast luffing device under the condition that the extension ends of the extension drive are retracted.

[0006] In the embodiment of the present application, the mast luffing device comprises a mast assembly and a luffing mechanism, both of which are arranged on the crane main unit, the extension drive is arranged at the upper end of the mast assembly, the luffing mechanism is located at the rear side of the mast assembly and connected with the upper end of the mast assembly, and the mast assembly is provided with a rotating roller for abutting against the inner side of the self-loading and unloading lifting appliance.

[0007] In the embodiment of the present application, the mast assembly comprises a mast top section arm, a mast middle section and a mast bottom section arm arranged in sequence from top to bottom, the mast bottom section arm is arranged on the crane main unit, the two ends of the mast middle section are respectively and correspondingly detachably connected with the mast top section arm and the mast bottom section arm, and the rotating roller is arranged on the mast middle section.

[0008] In the embodiment of the present application, the mast middle section comprises a middle section body and a roller support, the two ends of the middle section body are respectively and correspondingly detachably connected with the mast top section arm and the mast bottom section arm, the roller support is arranged as a triangular frame, the bottom side of the triangular frame is arranged on the upper side of the middle section body, and the rotating roller is arranged on the top end of the triangular frame.

[0009] In the embodiment of the present application, the auxiliary support is detachably arranged on the crane main unit.

[0010] In the embodiment of the present application, the auxiliary support comprises a first side pole, a second side pole and a third side pole connected in sequence, the first side pole is located on the upper side of the third side pole, the second side pole is arranged on the front ends of the first side pole and the third side pole, the rear ends of the first side pole and the third side pole are respectively fixed on the crane main unit, the first side pole is arranged in an inclined upward manner from rear to front, and a connecting part for mounting the self-loading and unloading lifting appliance is formed at the joint of the first side pole and the second side pole.

[0011] To achieve the above-mentioned purpose, the present application further provides a mast auxiliary pulling rod method, wherein the mast auxiliary pulling rod method adopts the mast auxiliary pulling rod system according to the above description, and comprises:

[0012] In the case that the jacking pulling rod device jacks up and pulls the mast luffing device, the telescopic drive member of the auxiliary pulling rod device is controlled to drive the telescopic end to perform a retraction movement, so as to assist in pulling up and pulling the mast luffing device.

[0013] In the embodiment of the present application, the mast auxiliary pulling rod method further comprises: in the case that the mast luffing device reaches a preset pulling rod position, the telescopic drive member is controlled to stop the auxiliary pulling rod operation.

[0014] In the embodiment of the present application, in the case that the jacking pulling rod device jacks up and pulls the mast luffing device, the telescopic drive member of the auxiliary pulling rod device is controlled to drive the telescopic end to perform a retraction movement, so as to assist in pulling up and pulling the mast luffing device, and before that, the mast auxiliary pulling rod method further comprises:

[0015] The auxiliary support is detachably mounted on the crane main unit;

[0016] The end of the self-loading and unloading lifting appliance away from the telescopic drive member is connected with the auxiliary support.

[0017] To achieve the above-mentioned purpose, the present application further provides a crane, wherein the crane comprises the mast auxiliary pulling rod system according to the above description.

[0018] By the technical scheme, the mast auxiliary jib system has the following beneficial effects:

[0019] Due to the auxiliary jib device added in the mast auxiliary jib system, the auxiliary jib device includes an auxiliary support, a telescopic driving member and a self-loading and unloading spreader, the auxiliary support is arranged on the main unit of the crane and located at the front side of the mast luffing device, the telescopic driving member is arranged at the upper end of the mast luffing device, and the two ends of the self-loading and unloading spreader are respectively and one-to-one connected with the two ends of the telescopic driving member and the auxiliary support, that is, before the jib operation of the longer and heavier boom is performed, the mast luffing device can be lifted and jibbed by using the jacking jib device, and the telescopic end can be driven to perform the retraction movement by using the telescopic driving member of the auxiliary jib device, so as to assist in lifting and jibbing the mast luffing device, thereby completing the jib operation of the reinforced and lengthened mast luffing device, and the reinforced and lengthened mast luffing device can meet the jib requirement of the longer and heavier boom, so that the jib requirement of the longer and heavier boom can be met by the mast system without the super-lifting working condition, and the purposes of simplifying the installation process of the mast system and reducing the transportation workload are achieved.

[0020] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and are used together with the following specific embodiments to explain the present application, but do not constitute a limitation on the present application. In the drawings:

[0022] Figure 1 is a structural schematic view of a mast auxiliary jib system in a jib pre-state according to an embodiment of the present application;

[0023] Figure 2 is a structural schematic view of a mast auxiliary jib system in a jib state according to an embodiment of the present application;

[0024] Figure 3 is a force analysis schematic view of a mast assembly in a jib process according to an embodiment of the present application;

[0025] Figure 4 is a structural schematic view of a mast auxiliary jib system in a self-loading and unloading crawler frame after the jib is completed according to an embodiment of the present application;

[0026] Figure 5 is a structural schematic view of a mast luffing device performing jib operation on a jib according to an embodiment of the present application;

[0027] Figure 6 is a structural schematic view of a mast assembly according to an embodiment of the present application;

[0028] Figure 7 is a structural schematic diagram of a middle section of a mast according to an embodiment of the present application;

[0029] Figure 8 is a structural schematic diagram of an auxiliary support according to an embodiment of the present application.

[0030] BRIEF DESCRIPTION OF DRAWINGS

[0031] 100 crane main unit 101 lower car frame

[0032] 102 upper car slewing ring 200 mast luffing device

[0033] 201 mast assembly 202 luffing mechanism

[0034] 203 mast top section arm 204 mast middle section

[0035] 205 mast bottom section arm 206 roller support

[0036] 207 rotating roller 208 winch

[0037] 209 luffing fixed pulley assembly 210 main luffing wire rope

[0038] 211 top support block 300 top lifting jib device

[0039] 400 auxiliary jib device 401 auxiliary support

[0040] 402 telescopic driving member 403 self-loading and unloading lifting tool

[0041] 404 first side jib 405 second side jib

[0042] 406 third side jib 407 reinforcing connecting rod

[0043] 500 crawler frame 600 lifting arm

[0044] 601 main luffing pull plate DETAILED DESCRIPTION

[0045] 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.

[0046] With the increasing demand for wind power construction, wind turbine hoisting gradually tends to be large-scale development, and the installation height is increasingly higher, which puts forward higher requirements on the strength and arm length of the crane jib.

[0047] Currently, the crane has two mast systems for jib operation in standard working condition and in super-lifting working condition, but the mast system in super-lifting working condition needs to assemble, install and transport devices such as super-lifting mast, super-lifting pulley block and super-lifting counterweight luffing mechanism, which has large workload, high operation cost, high purchase cost and relatively low return on investment; the jib length of the mast system in standard working condition is limited by many factors, not only by the length of the mast, but also by the tension plate force, resulting in limited jib length, although the position of the rear pulley block hinge point is moved in the prior art to improve the jib length limited by the luffing rope force, but the improvement effect is not obvious, and the main luffing tension plate force is greatly limited, the arrangement of the mast jacking cylinder is limited by space, and cannot be too large, resulting in limited mast jacking force, and the cost of the jacking cylinder is high.

[0048] Therefore, the present application provides a mast auxiliary jib system, method and crane, which can realize jib operation of a strong and long mast in standard working condition, so as to improve the stress state of the main luffing tension plate and the main luffing wire rope in standard working condition through the strong and long mast, and realize jib operation of a strong and long jib 600.

[0049] The mast auxiliary jib system, method and crane of the present application will be described below with reference to the accompanying drawings.

[0050] As shown in Figure 1 and Figure 2 The present application provides a mast auxiliary jib system, wherein the mast auxiliary jib system comprises:

[0051] a crane main unit 100;

[0052] a mast luffing device 200 arranged on the crane main unit 100;

[0053] a jacking jib device 300 arranged on the crane main unit 100 and used for jacking and jibbing the mast luffing device;

[0054] an auxiliary jib device 400 comprising an auxiliary support 401, a telescopic driving member 402 and a self-loading and unloading lifting appliance 403, the auxiliary support 401 is arranged on the crane main unit 100 and located at the front side of the mast luffing device 200, the telescopic driving member 402 is arranged at the upper end of the mast luffing device 200, and the two ends of the self-loading and unloading lifting appliance 403 are respectively and one-to-one connected with the telescopic ends of the telescopic driving member 402 and the auxiliary support 401, so as to assist in jacking and jibbing the mast luffing device 200 under the condition that the telescopic ends of the telescopic driving member 402 are retracted.

[0055] Due to the auxiliary jib device 400 added in the mast auxiliary jib system, the auxiliary jib device 400 includes an auxiliary support 401, a telescopic driving part 402 and a self-loading and unloading lifting appliance 403, the auxiliary support 401 is arranged on the crane main unit 100 and located at the front side of the mast luffing device 200, the telescopic driving part 402 is arranged at the upper end of the mast luffing device 200, and the two ends of the self-loading and unloading lifting appliance 403 are respectively and one-to-one connected with the two ends of the telescopic driving part 402 and the auxiliary support 401, that is, before the jib operation of the longer and heavier arm support 600 is performed, the telescopic end can be driven to retract by the telescopic driving part 402 of the auxiliary jib device 400 to assist in lifting and turning the mast luffing device 200, so as to complete the jib operation of the reinforced and lengthened mast luffing device 200, and then the reinforced and lengthened mast luffing device 200 can meet the jib requirements of the longer and heavier arm support, so that the jib requirements of the longer and heavier arm support can be met by the mast system without the super-lifting working condition, and the purposes of simplifying the installation process of the mast system and reducing the transportation workload are achieved.

[0056] In the embodiment of the application, the mast luffing device 200 includes a mast assembly 201 and a luffing mechanism 202, both of which are arranged on the crane main unit 100, the telescopic driving part 402 is arranged at the upper end of the mast assembly 201, the luffing mechanism 202 is located at the rear side of the mast assembly 201 and connected with the upper end of the mast assembly 201, and the mast assembly 201 is provided with a rotating roller 207 for abutting against the inner side of the self-loading and unloading lifting appliance 403. That is, by adding the rotating roller 207 on the mast assembly 201, the self-loading and unloading lifting appliance 403 can be limited to a certain extent to avoid contact between the self-loading and unloading lifting appliance 403 and the mast assembly 201, and since the rotating roller 207 is rotatably arranged, the wear of the self-loading and unloading lifting appliance 403 during the pulling process can be reduced.

[0057] Specifically, the crane main unit 100 includes a lower vehicle frame 101 and an upper vehicle turntable 102 rotatably arranged on the lower vehicle frame 101, the mast assembly 201 and the luffing mechanism 202 are both arranged on the upper vehicle turntable 102, and the luffing mechanism 202 includes a winch 208, a luffing fixed pulley assembly 209 and a main luffing steel wire rope 210.

[0058] Referring to Figure 6 and Figure 7In the embodiment of the present application, the mast assembly 201 comprises a mast top section arm 203, a mast middle section 204 and a mast bottom section arm 205 arranged in sequence from top to bottom, the mast bottom section arm 205 is arranged on the crane main unit 100, the two ends of the mast middle section 204 are respectively and correspondingly detachably connected with the mast top section arm 203 and the mast bottom section arm 205, and the rotating roller 207 is arranged on the mast middle section 204. That is, the mast assembly 201 can be lengthened through the mast middle section 204 to obtain a larger boom length in the standard working condition, and when the super-lifting working condition needs to be realized, the mast middle section 204 of the mast assembly 201 can be detached and the mast top section arm 203 and the mast bottom section arm 205 can be connected to form a mast (non-super-lifting mast) in the super-lifting working condition, the stroke range limitation of the luffing mechanism of the super-lifting counterweight in the super-lifting working condition is smaller, better operation flexibility is obtained, and the stress state of the main luffing wire rope 210 in the super-lifting working condition is better. In this arrangement, the length of the mast assembly 201 can be changed by detaching and assembling the mast middle section 204, so that the mast assembly 201 can adapt to various working conditions and increase the use range of the mast assembly 201. Meanwhile, the number of the mast middle section 204 can include but is not limited to one.

[0059] Specifically, the height of the rotating roller 207 arranged on the mast middle section 204 should not be too high, otherwise it will interfere with the self-loading and unloading hoisting operation cooperated by the subsequent telescopic driving member 402 and the self-loading and unloading spreader 403.

[0060] In the embodiment of the present application, the mast middle section 204 comprises a middle section body and a roller support 206, the two ends of the middle section body are respectively and correspondingly detachably connected with the mast top section arm 203 and the mast bottom section arm 205, the roller support 206 is arranged as a triangular frame, the bottom side of the triangular frame is arranged on the upper side of the middle section body, and the rotating roller 207 is arranged at the top end of the triangular frame. The addition of the roller support 206 can not only facilitate the arrangement of the rotating roller 207 on the mast middle section 204, but also increase the distance between the rotating roller 207 and the mast middle section 204 to tension and support the self-loading and unloading spreader 403 and make the self-loading and unloading spreader 403 away from the mast middle section 204. In addition, the arrangement of the roller support 206 as a triangular frame can ensure the stability of the structure. Of course, the present application is not limited to this, the roller support 206 can be arranged as other suitable shapes, and the roller support 206 and the rotating roller 207 are not limited to being arranged on the mast middle section 204, but can be arranged at suitable positions of the mast top section arm 203 and the mast bottom section arm 205.

[0061] Referring to Figure 1 , Figure 2 , Figure 4 and Figure 5In the embodiment of the present application, the auxiliary support 401 is detachably arranged on the main unit 100 of the crane. That is, after the auxiliary lever device 400 completes the operation of assisting in lifting and pulling the luffing device 200 of the mast, the self-loading and unloading hoist 403 is first detached from the auxiliary support 401, and then the auxiliary support 401 is detached from the main unit 100 of the crane, so as to facilitate the subsequent installation of the lifting arm 600 and the luffing operation. Specifically, the auxiliary support 401 is detachably installed near the hinge point position of the lifting arm 600 on the upper turntable 102 of the main unit 100 of the crane. More specifically, the front side of the upper turntable 102 is provided with at least two mounting points for mounting the auxiliary support 401, and the mutual positions of the at least two mounting points should be able to ensure that the auxiliary support 401 cannot rotate after being mounted on the main unit, so as to ensure that the auxiliary support 401 can withstand the pulling force from the telescopic driving member 402.

[0062] As shown in Figure 8 In the embodiment of the present application, the auxiliary support 401 comprises a first side rod 404, a second side rod 405 and a third side rod 406 connected in sequence, the first side rod 404 is located on the upper side of the third side rod 406, the second side rod 405 is arranged at the front ends of the first side rod 404 and the third side rod 406, and the rear ends of the first side rod 404 and the third side rod 406 are fixedly arranged on the main unit 100 of the crane, that is, the first side rod 404 and the third side rod 406 are connected with the main unit 100 of the crane, so as to improve the stability of the installation of the auxiliary support 401, and the first side rod 404 is arranged in an inclined upward manner from back to front, a connecting portion for mounting the self-loading and unloading hoist 403 is formed at the joint of the first side rod 404 and the second side rod 405, that is, the joint of the first side rod 404 and the second side rod 405 is the highest point of the auxiliary support 401, and the connecting portion for connecting with the self-loading and unloading hoist 403 is formed at the highest point of the auxiliary support 401, specifically, the connecting portion can be a connecting hole arranged at the joint, and the auxiliary support 401 further comprises a reinforcing connecting rod 407 connecting the first side rod 404 and the third side rod 406. It should be particularly noted that the front-rear direction in the present application is defined with respect to the forward direction of the crane.

[0063] Please refer again to Figure 1 and Figure 2 In the embodiment of the present application, the jacking lever device 300 can be a jacking cylinder arranged on the upper turntable 102 of the main unit 100 of the crane, the mast bottom section arm of the mast assembly 201 is provided with a jacking block 211, the jacking block 211 is used for abutting against the telescopic end of the jacking cylinder arranged upward, and the telescopic driving member 402 can be a self-loading and unloading cylinder. The self-loading and unloading cylinder on the upper end of the mast assembly 201 cooperates with the self-loading and unloading hoist 403 to not only be able to assist in lifting and pulling the luffing device 200 of the mast, but also be able to carry some accessories during the disassembly and assembly of the crane, for example, a track frame 500 (see Figure 4In addition, during the process of pulling up the mast assembly 201, the length of the self-loading and unloading hoist 403 is a fixed value, and the distance from the rotating roller 207 to the auxiliary support 401 gradually changes, so the self-loading and unloading cylinder should be in a non-minimum stroke position before the pulling rod, to ensure that the self-loading and unloading cylinder has a tension state on the auxiliary support 401.

[0064] To achieve the above object, the application further provides a mast auxiliary pulling rod method, wherein the mast auxiliary pulling rod method adopts the mast auxiliary pulling rod system as described above, and comprises the following steps:

[0065] When the jacking pulling rod device 300 jacks up the pulling mast luffing device 200, the telescopic driving part 402 of the auxiliary pulling rod device 400 is controlled to drive the telescopic end to perform a retraction movement, to assist in pulling up the pulling mast luffing device 200.

[0066] That is, before the lifting arm 600 of the longer and heavier arm support is operated, the jacking pulling rod device 300 can be used to jack up the pulling mast luffing device 200, and at the same time, the telescopic driving part 402 of the auxiliary pulling rod device 400 can be used to drive the telescopic end to perform a retraction movement, to assist in pulling up the pulling mast luffing device 200, so as to complete the pulling rod operation of the strengthened and lengthened mast luffing device 200, and then the strengthened and lengthened mast luffing device 200 can meet the requirements of the longer and heavier arm support, so that the longer and heavier arm support can be lifted by the mast system without the super-lifting working condition, and the installation process of the mast system is simplified and the transportation workload is reduced.

[0067] In the embodiment of the application, the mast auxiliary pulling rod method further comprises:

[0068] When the mast luffing device 200 reaches the preset pulling rod position, the telescopic driving part 402 is controlled to stop the auxiliary pulling rod operation.

[0069] Specifically, Figure 3 A force analysis diagram of the mast assembly 201 under the combined pulling rod action of the jacking pulling rod device 300 and the auxiliary pulling rod device 400 is shown in the figure, wherein G is the weight of the mast assembly 201 and its accessories, F1 is the pulling force of the auxiliary pulling rod device 400, F2 is the pushing force of the jacking pulling rod device 300, L1 is the force arm of the pulling force of the telescopic driving part 402 on the root mounting point of the mast assembly 201, L2 is the force arm of the pushing force of the jacking pulling rod device 300 on the root mounting point of the mast assembly 201, and L3 is the force arm of the weight of the mast assembly 201 and its accessories on the root mounting point of the mast assembly 201. Figure 2As shown, when the mast assembly 201 is raised to a certain intermediate state, as the mast assembly 201 is raised, the center of gravity of the mast assembly 201 will be closer to the root of the mast assembly 201. The decreasing trend of its lever arm L3 is more significant than that of L1 and L2. Therefore, after the mast assembly 201 is raised to a certain intermediate state, the mast assembly 201 can be raised by the thrust of the lifting lever device 300. That is, after the mast assembly 201 is raised to the preset lever position, the auxiliary lever device 400 is no longer needed to perform auxiliary lever operation, thus ensuring energy efficiency.

[0070] In this embodiment of the invention, before the lifting lever device 300 lifts and actuates the mast luffing device 200, and before controlling the telescopic drive member 402 of the auxiliary lever device 400 to drive the telescopic end to retract to assist in lifting and actuating the mast luffing device 200, the following steps are also included:

[0071] The auxiliary bracket 401 is detachably mounted on the crane main unit 100;

[0072] Connect the end of the self-loading and unloading lifting device 403 away from the telescopic drive component 402 to the auxiliary support 401.

[0073] The auxiliary support 401 is detachably mounted on the crane main unit 100. After the auxiliary lever device 400 completes the operation of assisting in lifting and maneuvering the mast luffing device 200, the self-loading and unloading spreader 403 can be removed from the auxiliary support 401 first, and then the auxiliary support 401 can be removed from the crane main unit 100 to facilitate the subsequent installation of the boom 600 and boom lifting operation.

[0074] Furthermore, the steps of the entire mast auxiliary lever method may include:

[0075] Step 1: Unload the crane main unit 100 from the transport flatbed truck;

[0076] Step 2: Before the track frame 500 is installed, the main crane unit 100 is lifted by the outrigger lifting cylinder.

[0077] Step 3: Complete the installation of the mast assembly 201, luffing mechanism 202, self-loading and unloading cylinder, and self-loading and unloading spreader 403 on the crane main unit 100;

[0078] Step 4: Install the auxiliary bracket 401 onto the crane main unit 100 and position it on the front side of the mast assembly 201;

[0079] Step 5: Connect the lower end of the self-loading and unloading spreader 403, which is located away from the self-loading and unloading cylinder, to the auxiliary support 401, as follows: Figure 1 The image shows the installation state of the mast assembly 201 before the lever;

[0080] Step six, in the case of the jacking lever device 300 jacking the levering mast luffing device 200, the telescopic drive 402 of the auxiliary lever device 400 is controlled to drive the telescopic end to retract, thereby assisting in lifting the levering mast luffing device 200, as shown in FIG. 8, which is a state diagram of the levering operation of the mast assembly 201 to an intermediate state. Figure 2

[0081] Step seven, after the completion of the levering operation, the self-loading and unloading hoist 403 is detached from the auxiliary support 401, the auxiliary support 401 is detached from the main unit 100 of the crane, and the crawler frame 500 is hoisted by the self-loading and unloading hoist 403, so that the crawler frame 500 can be hoisted into position for installation by the self-loading and unloading cylinder and the self-loading and unloading hoist 403, as shown in FIG. 9, which is a state diagram of the self-loading and unloading of the crawler frame 500 after the completion of the levering operation. Figure 4

[0082] Step eight, after the completion of the installation of the jib 600 and the main luffing pull plate 601, the effect of Figure 5 is achieved.

[0083] To achieve the above object, the present application further provides a crane, wherein the crane comprises the mast auxiliary levering system according to the above description. Since the crane adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Specifically, the crane can include but is not limited to a crawler crane.

[0084] In the description of the present application, it should be understood that the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0085] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and other terms should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0086] ​​In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the 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 suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0087] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A mast assist lever system characterized by, The mast auxiliary jib system comprises: a crane main unit (100); a mast luffing device (200) arranged on the crane main unit (100); a jacking jib device (300) arranged on the crane main unit (100) and used for jacking and jibbing the mast luffing device (200); an auxiliary jib device (400) comprising an auxiliary support (401), a telescopic driving member (402) and a self-loading and unloading lifting appliance (403), the auxiliary support (401) being arranged on the crane main unit (100) and located at the front side of the mast luffing device (200), the telescopic driving member (402) being arranged at the upper end of the mast luffing device (200), and the two ends of the self-loading and unloading lifting appliance (403) being respectively and one-to-one connected with the telescopic ends of the telescopic driving member (402) and the auxiliary support (401) so as to assist in jacking and jibbing the mast luffing device (200) in the case of retraction movement of the telescopic ends of the telescopic driving member (402); the mast auxiliary jib system is configured to: in the case of jacking and jibbing the mast luffing device (200) by the jacking jib device (300), the telescopic driving member (402) of the auxiliary jib device (400) is controlled to drive the telescopic ends to perform retraction movement so as to assist in jacking and jibbing the mast luffing device (200).

2. The mast assist lever system of claim 1, wherein, the mast luffing device (200) comprises a mast assembly (201) and a luffing mechanism (202) both arranged on the crane main unit (100), the telescopic driving member (402) is arranged at the upper end of the mast assembly (201), the luffing mechanism (202) is located at the rear side of the mast assembly (201) and connected with the upper end of the mast assembly (201), and a rotating supporting roller (207) is arranged on the mast assembly (201) and used for abutting against the inner side of the self-loading and unloading lifting appliance (403).

3. The mast assist lever system of claim 2, wherein, the mast assembly (201) comprises a mast top section arm (203), a mast middle section (204) and a mast bottom section arm (205) arranged in sequence from top to bottom, the mast bottom section arm (205) is arranged on the crane main unit (100), the two ends of the mast middle section (204) are respectively and one-to-one detachably connected with the mast top section arm (203) and the mast bottom section arm (205), and the rotating supporting roller (207) is arranged on the mast middle section (204).

4. The mast assist lever system of claim 3, wherein, the mast middle section (204) comprises a middle section body and a roller support (206), the two ends of the middle section body are respectively and one-to-one detachably connected with the mast top section arm (203) and the mast bottom section arm (205), the roller support (206) is arranged as a triangular frame, the bottom side of the triangular frame is arranged on the upper side of the middle section body, and the rotating supporting roller (207) is arranged at the top end of the triangular frame.

5. A mast assist handle system according to any one of claims 1 to 4, wherein, the auxiliary support (401) is detachably arranged on the crane main unit (100).

6. A jib assist lever system according to any one of claims 1 to 4, characterised in that, The auxiliary support (401) comprises a first edge pole (404), a second edge pole (405) and a third edge pole (406) connected in sequence, the first edge pole (404) is located on the upper side of the third edge pole (406), the second edge pole (405) is arranged at the front end of the first edge pole (404) and the third edge pole (406), the rear ends of the first edge pole (404) and the third edge pole (406) are fixedly arranged on the crane main unit (100), the first edge pole (404) is arranged in an inclined upward manner from back to front, and a connecting portion for mounting the self-loading and unloading spreader (403) is formed at the joint of the first edge pole (404) and the second edge pole (405).

7. A method of mast-assisted winching, characterised in that, The mast auxiliary jib method employs the mast auxiliary jib system according to any one of claims 1 to 6, and comprises: In the case that the jacking jib device (300) jacks up and rotates the mast luffing device (200), the telescopic drive (402) of the auxiliary jib device (400) is controlled to drive the telescopic end to perform a retraction movement, so as to assist in lifting and rotating the mast luffing device (200).

8. The method of claim 7, wherein, The mast auxiliary jib method further comprises: In the case that the mast luffing device (200) reaches a preset jib position, the telescopic drive (402) is controlled to stop the auxiliary jib operation.

9. The method of claim 7, wherein, Before the case that the jacking jib device (300) jacks up and rotates the mast luffing device (200), the telescopic drive (402) of the auxiliary jib device (400) is controlled to drive the telescopic end to perform a retraction movement, so as to assist in lifting and rotating the mast luffing device (200), the mast auxiliary jib method further comprises: The auxiliary support (401) is detachably mounted on the crane main unit (100); One end of the self-loading and unloading spreader (403) away from the telescopic drive (402) is connected with the auxiliary support (401).

10. A crane, characterized in that The crane comprises the mast auxiliary jib system according to any one of claims 1 to 6.

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