A lifting device for installing a slewing bearing of a crane and a method of using the same

Abstract

The present application relates to a kind of special lifting jack-up tool for crane slewing bearing installation and its using method, belong to tool fixture technical field, including two wheels connected together by rotating shaft two, bottom plate is installed on rotating shaft two, one adjusting nut is respectively installed on the front and rear ends of bottom plate, support sleeve is equipped on bottom plate, lifting mechanism is equipped in support sleeve, rotating shaft one is equipped above lifting mechanism, arc flange is fixedly arranged on the upper end of rotating shaft one.The gear ring is installed by the lifting jack-up tool of the present application, which greatly saves manpower, material resources, reduces cost and reduces safety hazards.The use method of lifting jack-up tool includes the following steps: assembling lifting jack-up tool, adjusting arc flange, placing pad iron, hoisting rotating platform, moving lifting jack-up tool to below rotating platform, rotating tire, adjusting gear ring position, adjusting the connection hole of gear ring and rotating platform flange to coincide, finally, disconnecting connecting bolt, lifting gear ring by jack, stopping when contacting with the bottom surface of rotating platform flange, lowering lifting jack-up tool and removing.

Description

TECHNICAL FIELD

[0001] The present application relates to a special lifting tool for installing a slewing bearing of a crane and a method for using the same, and belongs to the technical field of tool fixtures. BACKGROUND

[0002] In the operation process of a port loading and unloading machine door machine, the door machine can freely rotate 360° after grabbing the cargo, which is realized by supporting the outer tooth rolling bearing (also called gear ring) between the cylinder and the rotating platform. The gear ring installation surface of the cylinder faces upward, and during installation, a large-tonnage crane is directly used to lift the rotating platform together with the gear ring below, and then the installation is completed. However, the gear ring installation surface of the rotating platform faces downward, and the installation is relatively difficult. In the past, the process of installing the gear ring of the door machine rotating platform generally includes the following steps: first, the gear ring is hoisted onto a special tray for gear ring installation by a crane; then, the tray is hoisted to a position below the rotating platform; then, the tray is lifted by two forklifts; finally, the tray is fastened to the rotating platform by fastening bolts. This operation method requires one crane and two forklifts for transportation, which has the problem of man-machine cooperation and cannot realize man-machine separation, which has safety hazards. Moreover, the gear ring bolt hole and the rotating platform flange bolt hole cannot be aligned every time, and need to be adjusted by lifting and landing multiple times, which prolongs the operation time, and the installation time is half a day at the least and one day at the most, which leads to low production efficiency. The use of one crane and two forklifts also increases the production cost.

[0003] The traditional installation method of the slewing bearing has the following disadvantages:

[0004] 1. One crane and two forklifts are required for cooperation, and the operator needs to cooperate with the two forklifts during the operation process, and a special command hand is required for command. The operator performs installation operation, and during the entire installation process, man-machine separation cannot be realized, which has serious safety hazards.

[0005] 2. Multiple mechanical vehicles need to be cooperated during the installation process, and the process flow is long. There is a time difference between each process, which increases the installation auxiliary time and causes the gear ring bolt hole and the rotating platform flange bolt hole to not coincide during the lifting process of the two forklifts. Therefore, it is necessary to adjust the installation by lowering and lifting again, which will cause the installation time to be too long and the production efficiency to be unable to be improved.

[0006] 3. During the entire installation process, one crane driver, two forklift drivers, one command hand, and three installation workers are required, and a total of seven people are required to cooperate to complete the installation of the gear ring. The use of three mechanical vehicles and the labor cost of seven people increase the production cost a lot.

[0007] In summary, according to the current installation process, many people and many types of machines are needed to cooperate in the installation process, and the safety risk is relatively large. The number of personnel and the number of machines used are relatively large, resulting in high production costs, and the efficiency in the installation process is difficult to improve, resulting in low production efficiency. SUMMARY

[0008] The present application aims at the above-mentioned problems, and provides a crane slewing bearing installation special jacking tool and a using method thereof.

[0009] The present application is realized by the following technical solutions:

[0010] That is, a crane slewing bearing installation special jacking tool, comprising two wheels connected together through a rotating shaft two, a bottom plate is installed on the rotating shaft two, an adjusting nut is installed on the front and rear ends of the bottom plate respectively, a supporting sleeve is arranged on the bottom plate, a jacking mechanism is arranged in the supporting sleeve, a rotating shaft one is arranged above the jacking mechanism, and an arc flange is fixedly arranged on the upper end of the rotating shaft one.

[0011] Through the application of the jacking tool, the number of personnel needed for installation is reduced from 7 to 3, the labor cost is reduced by nearly 60%, the installation time of each rotating platform is reduced from at least half a day to within 2 hours, and the efficiency is improved by more than 1 times. At the same time, the use of 1 crane and 2 forklifts is reduced, and the cost of equipment use is reduced. In terms of safety, the use of the jacking tool avoids the mode of forklift transportation and jacking, completely realizes the separation of operating personnel and mechanical vehicles, reduces the safety hidden danger, and reduces the probability of accidents. Each trolley can save at least 5,000 yuan of comprehensive production cost.

[0012] Further improvements of the present application also include that an insurance sleeve is arranged outside the upper part of the supporting sleeve, a bolt two is installed on the side wall of the insurance sleeve, and the insurance sleeve plays a role in protecting the rotating shaft one.

[0013] Further improvements of the present application also include that a groove is arranged on the rotating shaft two, and the bottom plate is clamped in the groove, so that the accurate and rapid installation of the bottom plate is facilitated.

[0014] Further improvements of the present application also include that a shaft sleeve and a bearing are arranged between the two ends of the rotating shaft two and the wheels, end covers and end cover baffles are arranged on the two end faces of the rotating shaft two, the end cover baffles and the end covers are installed on the two ends of the rotating shaft two through the bolt one, and the end cover is connected with the wheel through the countersunk screw.

[0015] Further improvements of the present application also include that the jacking mechanism is a jack.

[0016] The present application also provides a using method of the crane slewing bearing installation special jacking tool, comprising the following steps:

[0017] S1: Assemble three sets of jacking tools, adjust two adjusting bolts by rotating to make the jacking tools in a horizontal state and keep stable, adjust the direction of the arc-shaped flange, and make the maximum arc of the arc-shaped flange and the outer circle of the gear ring in the same direction;

[0018] S2: Use multiple pad irons below the rotary table to support, hoist the rotary table to the upper side of the pad irons, adjust the height of the pad irons, ensure that the rotary table flange has a height of 1.4 meters from the ground after the rotary table is hoisted to the upper side of the pad irons, and ensure that there is a gap of 50mm when the jacking tool drives the gear ring to the lower side of the rotary table flange;

[0019] S3: Hoist the gear ring to the upper end surface of the arc-shaped flange of the three sets of jacking tools, fix the gear ring by passing the bolts through the bolt holes on the gear ring and the arc-shaped flange, move the jacking tool to the lower side of the rotary table, rotate the tire of the jacking tool, adjust the position to drive the gear ring to rotate, and adjust the bolt connection hole on the gear ring to coincide with the connection hole on the rotary table flange;

[0020] S4: After the adjustment is completed, remove the bolts connecting the jacking tool and the gear ring, start the hydraulic station to make the hydraulic jack jacking, drive the gear ring to rise, stop when the gear ring contacts the bottom surface of the rotary table flange, pass in the locking bolt to connect the rotary table flange and the gear ring, lock the locking bolt, lower the jacking tool, and remove it.

[0021] The method of the present application is used to install the gear ring on the flange of the trolley, which is convenient and fast, saves manpower, material resources and financial resources, reduces safety hazards, and reduces the probability of accidents.

[0022] Further improvement of the present application is that in step S1, the three sets of jacking tools are equally distributed with the gear ring mounting bolt hole division circle as the diameter.

[0023] Further improvement of the present application is that in step S1, when the jacking arc-shaped flange and the direction of the arc-shaped flange are adjusted, the bolt two is in a loosened state, and when the height and direction of the arc-shaped flange are adjusted in place, the bolt two is used to lock the shaft one.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] 1. Through the application of the jacking tool of the present application, the personnel investment for installing the gear ring is reduced from 7 people to 3 people, the labor cost is reduced by nearly 60%, the installation time of each rotary table is reduced from at least half a day to less than 2 hours, and the efficiency is improved by more than 1 times. At the same time, the use of 1 crane and 2 forklifts is reduced, and the cost of equipment use is reduced. In terms of safety, the use of the jacking tool of the gear ring of the portal crane avoids the mode of forklift transportation and jacking, completely realizes the separation of the operating personnel and the mechanical vehicles, reduces the safety hazards, and reduces the probability of accidents. Each trolley can save comprehensive production cost of at least 5,000 yuan or more.

[0026] 2. The method of this invention for installing the gear ring onto the trolley flange is convenient and quick, saving manpower, material resources, and financial resources, while also reducing safety hazards and lowering the probability of accidents. Attached Figure Description

[0027] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Fig. 1 This is a front view structural diagram of the lifting tooling according to a specific embodiment of the present invention.

[0029] Fig. 2 This is a top view schematic diagram of the lifting fixture according to a specific embodiment of the present invention.

[0030] Fig. 3 This is a schematic diagram of the lifting fixture in use according to a specific embodiment of the present invention.

[0031] In the diagram: 1. Arc flange; 2. Shaft 1; 3. Support sleeve; 4. Base plate; 5. Shaft 2; 6. Wheel; 7. End cover; 8. End cover baffle; 9. Bushing; 10. Safety sleeve; 11. Adjusting bolt; 12. Bearing; 13. Countersunk screw; 14. Bolt 1; 15. Bolt 2; 16. Jack; 17. Turntable; 18. Ground; 19. Shim; 20. Gear ring; 21. Lifting fixture. Detailed Implementation

[0032] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0033] like Figs. 1 to 3 The crane slewing bearing installation special lifting fixture shown includes two wheels 6 connected together by a second slewing shaft 5. A base plate 4 is installed on the second slewing shaft 5. An adjusting nut 11 is installed on the front and rear ends of the base plate 4. A support sleeve 3 is provided on the base plate 4. A jack 16 is provided inside the support sleeve 3. A first slewing shaft 2 is provided above the lifting mechanism. An arc-shaped flange 1 is fixedly provided on the upper end of the first slewing shaft 2.

[0034] Among them, the upper part of the support sleeve 3 is provided with a safety sleeve 10, and bolts 15 are installed on the side wall of the safety sleeve 10.

[0035] Among them, the rotating shaft 2 5 is provided with a groove, and the base plate 4 is stuck in the groove.

[0036] The shaft sleeve 9 and the bearing 12 are arranged between the two ends of the second rotating shaft 5 and the wheels 6, and the end cover baffle 8 and the end cover 7 are arranged on the two end faces of the second rotating shaft 5, the end cover baffle 8 and the end cover 7 are installed on the two ends of the second rotating shaft 5 through the bolts 14, and the end cover 7 is connected with the wheels 6 through the countersunk head screw 13.

[0037] The application also provides a use method of the special lifting tool for installing the slewing bearing of the crane, and the use method comprises the following steps:

[0038] S1: three sets of lifting tools 21 are assembled, two adjusting bolts 11 are rotated to adjust the positions of the lifting tools 21 to be in a horizontal state and be stable, the direction of the arc-shaped flange 1 is adjusted, and the maximum arc of the arc-shaped flange 1 is in the same direction as the outer circle of the gear ring 20.

[0039] S2: a plurality of pad irons 19 are used to support below the rotating table 17, the rotating table 17 is hoisted to above the pad irons 19, the height of the pad irons 19 is adjusted, and it is ensured that the rotating table 17 is hoisted to above the pad irons 19, and the flange of the rotating table 17 is 1.4 meters away from the ground 18, so that there is a gap of 50 mm when the lifting tool 21 drives the gear ring 20 to be below the flange of the rotating table 17.

[0040] S3: the gear ring 20 is hoisted to the upper end face of the arc-shaped flange 1 of the three sets of lifting tools 21, the gear ring 20 is fixed through the bolts passing through the bolt holes on the gear ring 20 and the arc-shaped flange 1, the lifting tool 21 is pushed to move below the rotating table 17, the tire 6 of the lifting tool 21 is rotated, the position of the gear ring 20 is adjusted to drive the gear ring 20 to rotate, and the bolt connection hole on the gear ring 20 is adjusted to be coincided with the connection hole on the flange of the rotating table 17.

[0041] S4: after the adjustment is completed, the bolts connecting the lifting tool 21 and the gear ring 20 are removed, the hydraulic station is started to drive the hydraulic jack 16 to lift, the gear ring 20 is driven to rise, and the lifting is stopped when the gear ring 20 contacts the bottom face of the flange of the rotating table 17, the locking bolt is inserted to connect the flange of the rotating table 17 and the gear ring 20, the locking bolt is locked, the lifting tool 21 is lowered, and the lifting tool 21 can be removed.

[0042] In step S1, the three sets of lifting tools 21 are distributed with the installation bolt hole circle of the gear ring 20 as a diameter.

[0043] When the arc-shaped flange 1 is lifted and the direction of the arc-shaped flange 1 is adjusted, the second bolt 15 is in a loosened state, and the first rotating shaft 2 is locked by using the second bolt 15 after the height and the direction of the arc-shaped flange 1 are adjusted to be in place.

[0044] In the specification, each embodiment is described in a progressive manner, and each embodiment focuses on the difference from other embodiments.

[0045] The terms "upper," "lower," "outer," "inner," etc., used in the specification, claims, and accompanying drawings of this invention are used to distinguish relative positional relationships and are not necessarily qualitative. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0046] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method of using a hoist slewing bearing installation dedicated jacking tool, characterized in that, The jacking tool (21) comprises two wheels (6) connected together through the second rotating shaft (5), the bottom plate (4) is installed on the second rotating shaft (5), one adjusting nut (11) is installed on the front end and the rear end of the bottom plate (4) respectively, the supporting sleeve (3) is arranged on the bottom plate (4), the jacking mechanism is arranged in the supporting sleeve (3), the first rotating shaft (2) is arranged above the jacking mechanism, the arc-shaped flange (1) is fixedly arranged on the upper end of the first rotating shaft (2), the safety sleeve (10) is arranged outside the upper portion of the supporting sleeve (3), the bolt two (15) is installed on the side wall of the safety sleeve (10). The method comprises the following steps: S1: three sets of jacking tools (21) are assembled, two adjusting bolts (11) are rotated to adjust the jacking tools (21) to be in a horizontal state and remain stable, the direction of the arc-shaped flange (1) is adjusted, and the maximum arc of the arc-shaped flange (1) is coaxial with the outer circle of the gear ring (20); S2: a plurality of pad irons (19) are arranged below the rotating table (17), the rotating table (17) is hoisted to above the pad irons (19), the height of the pad irons (19) is adjusted, and after the rotating table (17) is hoisted to above the pad irons (19), the flange of the rotating table (17) is 1.4m away from the ground (18), and the jacking tool (21) drives the gear ring (20) to push the gear ring (20) to below the flange of the rotating table (17) with a gap of 50mm; S3: the gear ring (20) is hoisted to the upper end surface of the arc-shaped flange (1) of the three sets of jacking tools (21), the gear ring (20) is fixed by the bolt passing through the bolt holes on the gear ring (20) and the arc-shaped flange (1), the jacking tool (21) is pushed to below the rotating table (17), the wheel (6) of the jacking tool (21) is rotated, the position is adjusted to drive the gear ring (20) to rotate, and the bolt connecting hole on the gear ring (20) is adjusted to be coaxial with the connecting hole on the flange of the rotating table (17); S4: after the adjustment is completed, the bolt connecting the jacking tool (21) and the gear ring (20) is removed, the hydraulic station is started to drive the hydraulic jack (16) to jacking, the gear ring (20) is driven to rise, and the rising is stopped when the gear ring (20) is in contact with the bottom surface of the flange of the rotating table (17), the locking bolt is inserted to connect the flange of the rotating table (17) and the gear ring (20), the locking bolt is locked, the jacking tool (21) is lowered, and the jacking tool (21) can be removed.

2. The method of using a lifting tool for a slewing bearing of a crane according to claim 1, characterized in that The second rotating shaft (5) is provided with a groove, and the bottom plate (4) is clamped in the groove.

3. The method of using a lifting tool for a slewing bearing of a crane according to claim 1, characterized in that, The shaft sleeve (9) and the bearing (12) are arranged between the two ends of the second rotating shaft (5) and the wheel (6), the end cover baffle (8) and the end cover (7) are arranged on the two end faces of the second rotating shaft (5), the end cover baffle (8) and the end cover (7) are installed on the two ends of the second rotating shaft (5) through the bolt one (14), and the end cover (7) is connected with the wheel (6) through the countersunk screw (13).

4. The method of using a crane slewing bearing installation special lifting tool of claim 1, wherein, The jacking mechanism is the jack (16).

5. The method of using a crane slewing bearing installation special lifting tool of claim 1, wherein, In step S1, the three sets of jacking tools (21) are distributed on the basis of the gear ring (20) mounting bolt hole division circle as the diameter.

6. The method of using a crane slewing bearing installation special lifting tool of claim 1, wherein, In step S1, when the arc-shaped flange (1) is jacked and the direction of the arc-shaped flange (1) is adjusted, the bolt two (15) is in a loosened state, and when the height and direction of the arc-shaped flange (1) are adjusted to be in place, the bolt two (15) is used to lock the first rotating shaft (2).

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