CN109399442B - Large nut hoisting structure for mining electric excavator and hoisting method thereof - Google Patents
Large nut hoisting structure for mining electric excavator and hoisting method thereof Download PDFInfo
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- CN109399442B CN109399442B CN201811531621.7A CN201811531621A CN109399442B CN 109399442 B CN109399442 B CN 109399442B CN 201811531621 A CN201811531621 A CN 201811531621A CN 109399442 B CN109399442 B CN 109399442B
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- lifting
- hole
- shaft sleeve
- hoisting
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- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000005065 mining Methods 0.000 title claims abstract description 26
- 238000009434 installation Methods 0.000 claims abstract description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/12—Slings comprising chains, wires, ropes, or bands; Nets
- B66C1/16—Slings with load-engaging platforms or frameworks
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
The invention discloses a large-sized nut hoisting structure for a mining electric excavator and a hoisting method thereof, and relates to the technical field of nut assembly. The nut hoisting structure comprises a chassis, a platform, a central shaft sleeve, a nut, a lifting hook, a first lifting rope, a second lifting rope, a first manual hoist, a nut support pad and a lifting appliance; the center shaft sleeve is connected with the lifting hook through a first lifting rope, the nut supporting pad is clamped in a supporting pad groove at the bottom of the nut, the lifting appliance is clamped in a third through hole in the middle of the nut supporting pad, the lifting appliance is connected with the lifting hook through a second lifting rope, a first manual hoist is arranged on the second lifting rope, and the second lifting rope penetrates through a second through hole of the center shaft sleeve. During hoisting, the lifting hook lifts the central shaft sleeve to a certain height, then the nut is lifted through the first manual hoist, the nut keeps inclined, the nut is stably lifted to the installation position, and meanwhile, the gear below the installation position of the nut does not need to be temporarily dismounted, so that the device is safe, reliable, simple and convenient to operate and high in installation efficiency.
Description
Technical Field
The invention relates to the technical field of nut assembly, in particular to a large nut hoisting structure for a mining electric excavator and a hoisting method thereof.
Background
The scale of the mining electric excavator is large, and correspondingly, the parts of the mining electric excavator are also larger; the mining electric excavator is used as an important mining tool, the working strength of the mining electric excavator is very high, and the loss of parts is high. If the nut of the central shaft sleeve of the mining electric excavator is damaged, the nut needs to be replaced; because the gear is fixed at the left lower part of the nut fastening position, the distance between the gear and the nut fastening position is short, and the gear is inconvenient to temporarily disassemble, so that the nut installation is limited; meanwhile, the height of the nut fastening position is high, the installation space is limited, and the installation mode of directly jacking the nut is difficult to adopt; when the nut is hung, the nut is difficult to hang stably to the installation position due to the limitation of the gear position.
Disclosure of Invention
In order to solve the problems, the invention provides a large nut hoisting structure for a mining electric excavator and a hoisting method thereof, and the nut hoisting structure can ensure that a nut is stably hoisted to an installation position, and meanwhile, gears below the installation position of the nut do not need to be temporarily dismounted, so that the structure is safe and reliable, is simple and convenient to operate, and has high installation efficiency.
In order to achieve the above purpose, the present invention adopts the following scheme:
the invention aims to provide a large nut hoisting structure for a mining electric excavator, which comprises an underframe fixed on a foundation, a platform above the underframe, a central shaft sleeve, a gear, a spherical gasket and a nut, wherein the platform is provided with a vertical first through hole, the underframe is provided with a vertical stepped through hole, and the outer wall of the lower end of the central shaft sleeve is provided with threads; the lower end of the central shaft sleeve penetrates through the upper holes of the first through holes and the stepped through holes, and the lower end of the central shaft sleeve is positioned in the lower holes; a vertical second through hole is formed in the middle of the central shaft sleeve; the outer wall of the upper end of the central shaft sleeve extends to the periphery to form a bulge which is clamped on the platform; the spherical gasket is sleeved at the lower end of the central shaft sleeve; the gear is fixed on a horizontal shaft of the left inner wall of the lower hole of the stepped through hole; the hoisting structure further comprises a lifting hook, a first lifting rope, a second lifting rope, a first manual hoist, a nut support pad and a lifting appliance; the lifting hook is positioned above the second through hole; the central shaft sleeve is connected with a lifting hook through a first lifting rope, and the lifting hook lifts the central shaft sleeve to a certain height, so that a mounting position is provided for the nut; the nut is positioned on the nut support pad; a vertical third through hole is formed in the middle of the nut support pad; the lifting appliance is clamped in the third through hole, the center line of the lifting appliance is guaranteed to coincide with the center line of the nut, so that the nut is guaranteed to be lifted stably, the lifting appliance is connected with the lifting hook through the second lifting rope, the second lifting rope is provided with the first manual hoist, and the second lifting rope penetrates through the second through hole.
Still further, the hoisting structure still includes stay cord, second manual hoist, first engaging lug and second engaging lug, first engaging lug is fixed in the middle of nut support pad bottom surface right, the second engaging lug is fixed on the basis of center axle sleeve below, and the one end of stay cord is connected to first engaging lug, the other end of stay cord passes the second engaging lug and fixes the right inner wall at the lower hole, be equipped with second manual hoist on the stay cord. In the nut hoisting process, the pull rope and the second manual hoist are mutually matched, and the nut is inclined, so that the nut is stably hoisted, and the gear is prevented from being damaged.
Further, the nut support pad is also provided with four vertical fourth through holes which are circumferentially distributed around the third through holes; the lower extreme edge of nut is equipped with the chamfer, be equipped with a plurality of archs according to the circumference on the chamfer, the lower extreme of nut is opened and is held up the pad groove, four triangular blocks are formed to the lower extreme of nut, the nut holds up the pad card in holding up the pad inslot, four triangular blocks card respectively in four fourth through-holes. The pad groove and the nut pad are matched with each other, the nut and the nut pad do not slide relatively, the safety of the installation environment is guaranteed, and meanwhile the installation accuracy is guaranteed.
Further, the hoist is ladder cylindric, the hoist divide into hypomere cylinder, middle section cylinder, upper segment cylinder and rings, the middle section cylinder is located the third through-hole that the nut supported the pad, the hypomere cylinder is located the nut and supports the pad below, the upper segment cylinder of hoist is fixed with rings, rings pass through second lifting rope and connect the lifting hook.
Further, the inner diameter of the third through hole is smaller than the diameter of the lower section cylinder.
Further, the upper end face of the nut and the lower end face of the spherical gasket are matched with each other and are both curved surfaces.
The invention further aims to provide a hoisting method of a large-sized nut hoisting structure for a mining electric excavator, which comprises the following steps of:
step one: cutting a nut into a pad supporting groove, cutting a steel plate into a third through hole and a fourth through hole to obtain a nut pad, and fixing a first connecting lug in the middle of the right side of the bottom surface of the nut pad;
step two: machining a ladder columnar lifting appliance by using a machine tool, and fixing a lifting ring on the upper section cylinder of the lifting appliance;
step three: the spherical gasket, the processed nut, the nut support pad and the lifting tool are conveyed to the lower hole of the stepped through hole, a second connecting lug is fixed, a second manual hoist is arranged on the pull rope, one end of the pull rope is fixed with the first connecting lug, the other end of the pull rope penetrates through the second connecting lug and is then fixed on the inner wall of the lower hole of the stepped through hole, the lifting tool is clamped in the third through hole of the nut support pad, the spherical gasket is placed on the nut, and then the nut is placed on the nut support pad;
step four: connecting a lifting hook of a crane with a central shaft sleeve through a first lifting rope, lifting the central shaft sleeve, and keeping the lower end of the central shaft sleeve positioned in a lower hole of the stepped through hole;
step five: a first manual hoist is arranged on the second lifting rope, and then the lifting hook is connected with the lifting ring through the second lifting rope;
step six: the first manual hoist is operated, the nut supporting pad is firstly lifted, the nut supporting pad is clamped in the supporting pad groove of the nut, and then the nut is lifted along with the nut supporting pad; meanwhile, the second manual hoist is operated, the length of the pull rope is controlled, the nut and the nut support pad are kept inclined, and the nut is kept from touching the gear;
step seven: when the lower edge of the left end of the nut is higher than the gear, continuing to operate the first manual hoist and the second manual hoist, controlling the length of the pull rope until the nut and the nut support pad are horizontal, and removing the pull rope;
step eight: operating a crane to descend the lifting hook, keeping the nut not touching the gear, enabling the central shaft sleeve to descend, and simultaneously operating the first manual hoist until the nut contacts the central shaft sleeve, and stopping operating the first manual hoist;
step nine: continuing to descend the lifting hook until the distance between the nut and the gear is the minimum distance which does not prevent the nut from being installed, and then screwing the nut part on the central shaft sleeve through an installation tool; repeatedly descending the lifting hook and screwing the nut until the nut is completely fastened at the lower end of the central shaft sleeve;
step ten: the first manual hoist is operated, the nut support pad and the lifting appliance are put down, then the first lifting rope, the second lifting rope, the first manual hoist, the nut support pad, the lifting appliance, the pull rope and the second manual hoist are removed, and anti-loosening treatment is carried out on the nut.
Further, in the second step, when the lifting tool is processed, the diameter of the middle section cylinder of the lifting tool is smaller than the inner diameter of the third through hole, and the diameter of the lower section cylinder of the lifting tool is larger than the inner diameter of the third through hole.
Further, in step nine, the retaining nut does not contact the gear when the hook is lowered.
Further, in the hoisting process, the pull rope is kept in a tensioning state.
The invention has the advantages that: in the hoisting structure of the large-sized nut, the supporting pad groove and the nut supporting pad are matched with each other, the nut and the nut supporting pad do not slide relatively, the safety of the installation environment is ensured, and meanwhile, the installation accuracy is ensured; the lifting appliance is positioned on the central line of the nut, so that stable and accurate lifting is further ensured; in the nut hoisting process, the pull rope and the second manual hoist are mutually matched, so that the nut is inclined, the nut is stably hoisted, and the gear is prevented from being damaged; when the large nut hoisting structure is used for hoisting nuts, gears below the installation positions of the nuts do not need to be temporarily disassembled, and the hoisting structure is safe and reliable; the hoisting method of the nut hoisting structure is simple and convenient to operate and high in installation efficiency; the auxiliary tools such as the nut support pad, the lifting tool and the like can be repeatedly used, so that the cost is reduced.
Drawings
Fig. 1 is a schematic view of the hoisting of a large nut according to the invention.
Fig. 2 is an enlarged schematic view at M in fig. 1.
Fig. 3 is a schematic view of the installation of the large nut of the present invention.
Fig. 4 is a schematic bottom view of the nut of the present invention.
FIG. 5 is a schematic cross-sectional view of the A-A plane of FIG. 4.
Fig. 6 is a schematic bottom view of a nut washer according to the present invention.
Fig. 7 is a schematic structural view of the hanger according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. As used in the specification and claims of the present disclosure, "upper", "lower", "left", "right", "front", "rear", and the like are used merely to indicate relative positional relationships, which change when the absolute position of the object to be described changes accordingly.
As shown in fig. 1 and 3, the basic structure of the installation position of the large nut for the mining electric excavator comprises a chassis 1, a platform 2, a central shaft sleeve 3, a gear 4, a spherical gasket 5 and a nut 6, wherein the platform 2 is fixed on the foundation, the platform 2 is provided with a vertical first through hole 7, the chassis 1 is provided with a vertical stepped through hole 8, and the outer wall of the lower end of the central shaft sleeve 3 is provided with threads; the lower end of the central shaft sleeve 3 passes through the first through hole 7 and the upper hole 8-1 of the stepped through hole 8, and the lower end of the central shaft sleeve 3 is positioned in the lower hole 8-2; a vertical second through hole 9 is formed in the middle of the central shaft sleeve 3; the outer wall of the upper end of the central shaft sleeve 3 extends to the periphery to form a bulge which is clamped on the platform 2; the spherical gasket 5 is sleeved at the lower end of the central shaft sleeve 3; the gear 4 is fixed on the horizontal shaft of the left inner wall of the lower hole 8-2 of the stepped through hole 8.
As shown in fig. 1 to 3, the large-sized nut hoisting structure for the mining electric excavator of the present invention comprises a lifting hook 10, a first lifting rope 11, a second lifting rope 12, a first hand hoist 13, a nut support pad 14, a lifting appliance 15, a pull rope 16, a second hand hoist 17, a first connecting lug 18 and a second connecting lug 19; the lifting hook 10 is positioned above the second through hole 9; the central shaft sleeve 3 is connected with a lifting hook 10 through a first lifting rope 11, and the lifting hook 10 lifts the central shaft sleeve 3 to a certain height, so that an installation position is provided for the nut 6; the nut 6 is positioned on the nut support pad 14; a vertical third through hole 14-1 is formed in the middle of the nut support pad 14; the lifting appliance 15 is clamped in the third through hole 14-1, so that the center line of the lifting appliance 15 is coincident with the center line of the nut 6, and the nut 6 is lifted stably, the lifting appliance 15 is connected with the lifting hook 10 through the second lifting rope 12, the second lifting rope 12 is provided with the first manual hoist 13, and the second lifting rope 12 passes through the second through hole 9; the first connecting lug 18 is fixed in the middle of the right side of the bottom surface of the nut support pad 14, the second connecting lug 19 is fixed on the basis of the lower part of the central shaft sleeve 3, the first connecting lug 18 is connected with one end of the pull rope 16, the other end of the pull rope 16 passes through the second connecting lug 19 to be fixed on the right inner wall of the lower hole 8-2, and the pull rope 16 is provided with the second manual hoist 17. The upper end face of the nut 6 and the lower end face of the spherical gasket 5 are matched with each other and are both curved surfaces. In the process of hoisting the nut 6, the pull rope 16 and the second manual hoist 17 are matched with each other, and the nut 6 is inclined, so that the nut 6 is stably hoisted, and the gear is prevented from being damaged.
As shown in fig. 6, the nut support pad 14 is further provided with four vertical fourth through holes 14-2, and the four fourth through holes 14-2 are circumferentially distributed around the third through hole 14-1; the lower end edge of the nut 6 is provided with a chamfer surface 6-1, a plurality of bulges 6-2 are circumferentially arranged on the chamfer surface 6-1, the lower end of the nut 6 is provided with a supporting pad groove 6-3, and the lower end of the nut 6 is provided with four triangular blocks 6-4; as shown in fig. 1 to 6, the nut support pad 14 is clamped in the support pad groove 6-3, and the four triangular blocks 6-4 are respectively clamped in the four fourth through holes 14-2. The supporting pad grooves 6-3 are matched with the nut supporting pad 14, the nut 6 and the nut supporting pad 14 do not slide relatively, the safety of the installation environment is guaranteed, and meanwhile the installation accuracy is guaranteed.
As shown in fig. 1 and 7, the lifting appliance 15 is in a stepped cylindrical shape, the lifting appliance 15 is divided into a lower section cylinder 15-1, a middle section cylinder 15-2, an upper section cylinder 15-3 and a lifting ring 15-4, the middle section cylinder 15-2 is positioned in a third through hole 14-1 of the nut supporting pad 14, the lower section cylinder 15-1 is positioned below the nut supporting pad 14, the lifting ring 15-4 is fixed on the upper section cylinder 15-3 of the lifting appliance 15, and the lifting ring 15-4 is connected with the lifting hook 10 through a second lifting rope 12. The third through hole 14-1 has an inner diameter smaller than the diameter of the lower cylinder 15-1.
As shown in fig. 7, the hanging ring 15-4 is composed of a U-shaped rod with a downward opening and a long bolt, one end of the U-shaped rod is provided with a transverse through hole, and the other end is provided with a transverse threaded hole; the upper end cylinder 15-3 is provided with a transverse round hole, and the long bolt sequentially passes through the transverse through hole and the transverse round hole and is screwed in the transverse threaded hole, so that the hanging ring 15-4 is formed.
As shown in fig. 1 and 7, the hoisting method of the large nut hoisting structure for the mining electric excavator comprises the following steps:
step one: cutting the nut 6 into a pad groove 6-3, cutting the steel plate into a third through hole 14-1 and a fourth through hole 14-2 to obtain a nut pad 14, and fixing a first connecting lug 18 in the middle of the right side of the bottom surface of the nut pad 14;
step two: machining a stepped columnar lifting appliance 15 by a machine tool, fixing a lifting ring 15-4 on an upper section cylinder 15-3 of the lifting appliance 15, wherein the diameter of a middle section cylinder 15-2 of the lifting appliance 15 is smaller than the inner diameter of a third through hole 14-1, and the diameter of a lower section cylinder 15-1 of the lifting appliance 15 is larger than the inner diameter of the third through hole 14-1;
step three: the spherical gasket 5, the processed nut 6, the nut support pad 14 and the lifting tool 15 are conveyed to the lower hole 8-2 of the stepped through hole 8, a second connecting lug 19 is fixed, a second manual hoist 17 is arranged on the pull rope 16, one end of the pull rope 16 is fixed with the first connecting lug 18, the other end of the pull rope passes through the second connecting lug 19 and then is fixed on the inner wall of the lower hole 8-2 of the stepped through hole 8, the lifting tool 15 is clamped in the third through hole 14-1 of the nut support pad 14, the spherical gasket 5 is placed on the nut 6, and then the nut 6 is placed on the nut support pad 14;
step four: the lifting hook 10 of the crane is connected with the central shaft sleeve 3 through the first lifting rope 11, the central shaft sleeve 3 is lifted, and the lower end of the central shaft sleeve 3 is kept in the lower hole 8-2 of the stepped through hole 8;
step five: a first manual hoist 13 is arranged on the second lifting rope 12, and then the lifting hook 10 is connected with the lifting ring 15-4 through the second lifting rope 12;
step six: the first manual hoist 13 is operated, the nut supporting pad 14 is firstly lifted, the nut supporting pad 14 is clamped in the supporting pad groove 6-3 of the nut 6, and then the nut 6 is lifted along with the nut supporting pad 14; meanwhile, the second manual hoist 17 is operated, the length of the pull rope 16 is controlled, the nut 6 and the nut support pad 14 are kept inclined, and the nut 6 is kept from touching the gear 4;
step seven: when the lower edge of the left end of the nut 6 is higher than the gear 4, continuing to operate the first manual hoist 13 and the second manual hoist 17, controlling the length of the pull rope 16 until the nut 6 and the nut support pad 14 are horizontal, and dismantling the pull rope 16;
step eight: operating the crane lowering hook 10 to keep the nut 6 from touching the gear 4 so that the central shaft sleeve 3 descends, and simultaneously operating the first manual hoist 13 until the nut 6 contacts the central shaft sleeve 3, and stopping operating the first manual hoist 13;
step nine: continuing to lower the lifting hook 10 until the distance between the nut 6 and the gear 4 is the minimum distance that does not interfere with the installation of the nut 6, and then partially screwing the nut 6 onto the central shaft sleeve 3 by an installation tool; repeatedly lowering the lifting hook 10 and screwing the nut 6 until the nut 6 is completely fastened at the lower end of the central shaft sleeve 3;
step ten: the first manual hoist 13 is operated, the nut support pad 14 and the lifting appliance 15 are put down, then the first lifting rope 11, the second lifting rope 12, the first manual hoist 13, the nut support pad 14, the lifting appliance 15, the pull rope 16 and the second manual hoist 17 are dismantled, and the anti-loosening treatment is carried out on the nut.
The pull cord 16 remains tensioned throughout the hoisting process.
In the hoisting structure of the large-sized nut, the supporting pad groove and the nut supporting pad are matched with each other, the nut and the nut supporting pad do not slide relatively, the safety of the installation environment is ensured, and meanwhile, the installation accuracy is ensured; the lifting appliance is positioned on the central line of the nut, so that stable and accurate lifting is further ensured; in the nut hoisting process, the pull rope and the second manual hoist are mutually matched, so that the nut is inclined, the nut 6 is stably hoisted, and the gear is prevented from being damaged; when the large nut hoisting structure is used for hoisting nuts, gears below the installation positions of the nuts do not need to be temporarily disassembled, and the hoisting structure is safe and reliable; the hoisting method of the nut hoisting structure is simple and convenient to operate and high in installation efficiency; the auxiliary tools such as the nut support pad, the lifting tool and the like can be repeatedly used, so that the cost is reduced.
Claims (9)
1. A hoisting method of a large-scale nut hoisting structure for a mining electric excavator is characterized in that,
the large nut hoisting structure for the mining electric excavator comprises an underframe (1) fixed on a foundation, a platform (2) above the underframe (1), a central shaft sleeve (3), a gear (4), a spherical gasket (5) and a nut (6), wherein the platform (2) is provided with a vertical first through hole (7), the underframe (1) is provided with a vertical stepped through hole (8), and the outer wall of the lower end of the central shaft sleeve (3) is provided with threads; the lower end of the central shaft sleeve (3) passes through the first through hole (7) and the upper hole (8-1) of the stepped through hole (8), and the lower end of the central shaft sleeve (3) is positioned in the lower hole (8-2); a vertical second through hole (9) is formed in the middle of the central shaft sleeve (3); the outer wall of the upper end of the central shaft sleeve (3) extends to the periphery to form a bulge, and is clamped on the platform (2); the spherical gasket (5) is sleeved at the lower end of the central shaft sleeve (3); the gear (4) is fixed on a horizontal shaft of the left inner wall of the lower hole (8-2) of the stepped through hole (8); the hoisting structure further comprises a lifting hook (10), a first lifting rope (11), a second lifting rope (12), a first manual hoist (13), a nut support pad (14) and a lifting appliance (15); the lifting hook (10) is positioned above the second through hole (9); the central shaft sleeve (3) is connected with a lifting hook (10) through a first lifting rope (11); the nut (6) is positioned on the nut support pad (14); a vertical third through hole (14-1) is formed in the middle of the nut support pad (14); the lifting appliance (15) is clamped in the third through hole (14-1), the lifting appliance (15) is connected with the lifting hook (10) through a second lifting rope (12), a first manual hoist (13) is arranged on the second lifting rope (12), and the second lifting rope (12) passes through the second through hole (9);
the method comprises the following steps:
step one: cutting a nut (6) into a pad groove (6-3), cutting a steel plate into a third through hole (14-1) and a fourth through hole (14-2) to obtain a nut pad (14), and fixing a first connecting lug (18) in the middle of the right side of the bottom surface of the nut pad (14);
step two: machining a ladder column-shaped lifting appliance (15) by using a machine tool, and then fixing a lifting ring (15-4) on an upper section column (15-3) of the lifting appliance (15);
step three: the spherical gasket (5), the processed nut (6), the nut supporting pad (14) and the lifting tool (15) are conveyed to the lower hole (8-2) of the stepped through hole (8), a second connecting lug (19) is fixed, a second manual hoist (17) is arranged on the pull rope (16), one end of the pull rope (16) is fixed with the first connecting lug (18), the other end of the pull rope passes through the second connecting lug (19) and then is fixed on the inner wall of the lower hole (8-2) of the stepped through hole (8), the lifting tool (15) is clamped in the third through hole (14-1) of the nut supporting pad (14), the spherical gasket (5) is placed on the nut (6), and then the nut (6) is placed on the nut supporting pad (14);
step four: a lifting hook (10) of a crane is connected with the central shaft sleeve (3) through a first lifting rope (11), the central shaft sleeve (3) is lifted, and the lower end of the central shaft sleeve (3) is kept in a lower hole (8-2) of the stepped through hole (8);
step five: a first manual hoist (13) is arranged on the second lifting rope (12), and then the lifting hook (10) is connected with the lifting ring (15-4) through the second lifting rope (12);
step six: the first manual hoist (13) is operated, the nut supporting pad (14) is firstly lifted, the nut supporting pad (14) is clamped in the supporting pad groove (6-3) of the nut (6), and then the nut (6) is lifted along with the nut supporting pad (14); meanwhile, the second manual hoist (17) is operated, the length of the pull rope (16) is controlled, the nut (6) and the nut support pad (14) are inclined, and the nut (6) is kept from touching the gear (4);
step seven: when the lower edge of the left end of the nut (6) is higher than the gear (4), the first manual hoist (13) and the second manual hoist (17) are continuously operated, the length of the pull rope (16) is controlled until the nut (6) and the nut support pad (14) are horizontal, and the pull rope (16) is dismounted;
step eight: operating a crane descending hook (10) to keep the nut (6) from touching the gear (4) so that the central shaft sleeve (3) descends, and simultaneously operating the first manual hoist (13) until the nut (6) contacts the central shaft sleeve (3) to stop operating the first manual hoist (13);
step nine: continuing to descend the lifting hook (10) until the distance between the nut (6) and the gear (4) is the minimum distance which does not prevent the nut (6) from being installed, and then partially screwing the nut (6) on the central shaft sleeve (3) through an installation tool; repeatedly descending the lifting hook (10) and screwing the nut (6) until the nut (6) is completely fastened at the lower end of the central shaft sleeve (3);
step ten: the first manual hoist (13) is operated, the nut support pad (14) and the lifting appliance (15) are put down, then the first lifting rope (11), the second lifting rope (12), the first manual hoist (13), the nut support pad (14), the lifting appliance (15), the pull rope (16) and the second manual hoist (17) are removed, and anti-loosening treatment is carried out on the nut.
2. The hoisting method of the large nut hoisting structure for the mining electric excavator according to claim 1, wherein the hoisting method comprises the following steps: the hoisting structure further comprises a pull rope (16), a second manual hoist (17), a first connecting lug (18) and a second connecting lug (19), wherein the first connecting lug (18) is fixed in the middle of the right side of the bottom surface of the nut support pad (14), the second connecting lug (19) is fixed on the basis of the lower side of the central shaft sleeve (3), one end of the pull rope (16) is connected with the first connecting lug (18), the other end of the pull rope (16) penetrates through the second connecting lug (19) to be fixed on the right inner wall of the lower hole (8-2), and the second manual hoist (17) is arranged on the pull rope (16).
3. The hoisting method of the large nut hoisting structure for the mining electric excavator according to claim 1, wherein the hoisting method comprises the following steps: the nut support pad (14) is also provided with four vertical fourth through holes (14-2), and the four fourth through holes (14-2) are circumferentially distributed around the third through hole (14-1); the lower extreme edge of nut (6) is equipped with chamfer face (6-1), be equipped with a plurality of archs (6-2) according to the circumference on chamfer face (6-1), support pad groove (6-3) are opened to the lower extreme of nut (6), the lower extreme of nut (6) forms four triangle pieces (6-4), nut support pad (14) card is in support pad groove (6-3), four triangle pieces (6-4) card respectively in four fourth holes (14-2).
4. The hoisting method of the large nut hoisting structure for the mining electric excavator according to claim 1, wherein the hoisting method comprises the following steps: the lifting appliance is characterized in that the lifting appliance (15) is in a ladder cylinder shape, the lifting appliance (15) is divided into a lower section cylinder (15-1), a middle section cylinder (15-2), an upper section cylinder (15-3) and a lifting ring (15-4), the middle section cylinder (15-2) is located in a third through hole (14-1) of the nut supporting pad (14), the lower section cylinder (15-1) is located below the nut supporting pad (14), the lifting ring (15-4) is fixed on the upper section cylinder (15-3) of the lifting appliance (15), and the lifting ring (15-4) is connected with the lifting hook (10) through a second lifting rope (12).
5. The hoisting method of the large nut hoisting structure for the mining electric excavator, according to claim 4, is characterized in that: the inner diameter of the third through hole (14-1) is smaller than the diameter of the lower section cylinder (15-1).
6. The hoisting method of the large nut hoisting structure for the mining electric excavator according to claim 1, wherein the hoisting method comprises the following steps: the upper end face of the nut (6) and the lower end face of the spherical gasket (5) are matched with each other and are both curved surfaces.
7. The hoisting method of the large nut hoisting structure for the mining electric excavator according to claim 1, wherein the hoisting method comprises the following steps: in the second step, when the lifting appliance is processed, the diameter of the middle section cylinder (15-2) of the lifting appliance (15) is smaller than the inner diameter of the third through hole (14-1), and the diameter of the lower section cylinder (15-1) of the lifting appliance (15) is larger than the inner diameter of the third through hole (14-1).
8. The hoisting method of the large nut hoisting structure for the mining electric excavator according to claim 1, wherein the hoisting method comprises the following steps: in the step nine, when the lifting hook (10) descends, the retaining nut (6) is not contacted with the gear (4).
9. The hoisting method of the large nut hoisting structure for the mining electric excavator according to claim 1, wherein the hoisting method comprises the following steps: during the hoisting process, the pull rope (16) is kept in a tensioning state.
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| CN109399442A (en) | 2019-03-01 |
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