Lifting method of large bearing lifting tools

Abstract

The present invention discloses a lifting method for a large-scale bearing lifting tool, which adopts a lifting tool and comprises the following steps: step 1, determining the installation position of a swing arm and hingedly connecting the swing arm to an upper crossbeam frame; step 2, installing a right-handed slider and a left-handed slider; step 3, connecting a left-handed and a right-handed transmission shaft; step 4, installing a left-claw fixing block and a right-claw fixing block; step 5, installing a suitable inner claw or outer claw; step 6, reliably connecting a lifting ring to the upper crossbeam frame; step 7, hooking the lifting tool to the large-scale bearing, connecting the lifting ring to the lifting equipment, and starting lifting. The method of the present invention has simple assembly operation, reasonable structural design, diverse assembly options and wide adaptability, meets the requirements for surface precision protection of large-scale bearings, and is safe and simple in the installation, disassembly and lifting processes.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical equipment manufacturing, and in particular relates to a lifting method of a large-scale bearing lifting tool. Background Art

[0002] Large bearings are generally designed with lifting threaded holes to facilitate smooth lifting and installation. However, in special cases, due to specific limitations such as strength and structure, lifting threaded holes cannot be designed, making the lifting and installation of large bearings quite difficult.

[0003] In addition, the traditional operation method is manual operation. While the overhead crane is lifting, large bearings are directly tied and lifted with wire ropes, which can easily scratch the surface of large bearings. Manual operation is labor-intensive, cumbersome, and unsafe, making the overall process inefficient, costly, and unreliable. Summary of the Invention

[0004] The purpose of the present invention is to provide a lifting method for a large bearing lifting tool, which solves the problem that for large bearings without lifting threaded holes, the existing technology uses manual operation and a method of directly bundling and lifting with steel wire ropes, which easily scratches the surface of the large bearings.

[0005] The technical solution adopted by the present invention is a lifting method of a large bearing lifting tool, which adopts a lifting tool and is implemented according to the following steps:

[0006] Step 1: Determine the installation position of the swing arm and hinge the swing arm to the upper crossbeam;

[0007] Step 2: Install the right-hand slider and the left-hand slider;

[0008] Step 3: Connect the left and right rotation drive shafts;

[0009] Step 4: Install the left and right claw fixing blocks;

[0010] Step 5: Install the appropriate inner or outer claws;

[0011] Step 6: Connect the lifting ring to the upper beam securely;

[0012] Step 7: Connect the lifting tool to the large bearing hook, connect the lifting ring to the lifting equipment, and start lifting.

[0013] The beneficial effects of the present invention are that the large bearing lifting tool (hereinafter referred to as the lifting tool) has simple assembly operation, reasonable structural design, diverse assembly options and wide adaptability, meets the requirements for surface precision protection of large bearings, and the installation, disassembly and lifting processes are safe and simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a perspective view of a lifting tool used in the method of the present invention;

[0015] Figure 2 is a perspective view of a lifting tool using an inner claw without a protective rubber pad according to embodiment 1 of the present invention;

[0016] Figure 3 is a perspective view of a lifting tool using an outer claw 1 without a protective rubber pad according to embodiment 2 of the present invention;

[0017] Figure 4 is a perspective view of a lifting tool using an inner claw 2 with a protective rubber pad according to embodiment 3 of the present invention;

[0018] Figure 5 is a perspective view of a lifting tool using an outer jaw 2 with a protective rubber pad according to embodiment 4 of the present invention;

[0019] Figure 6 This is a three-dimensional diagram of a large bearing that is a lifting object of the method of the present invention;

[0020] Figure 7 It is a schematic diagram of the upper crossbeam frame in the lifting tool of the present invention;

[0021] Figure 8 is a schematic diagram of a swing arm in a lifting tool of the present invention;

[0022] Figure 9 is a schematic diagram of a left-handed sliding block in the lifting tool of the present invention;

[0023] Figure 10 is a schematic diagram of a right-handed sliding block in the lifting tool of the present invention;

[0024] Figure 11 is a schematic diagram of the transmission shaft of the adjustment rod in the lifting tool of the present invention;

[0025] Figure 12 Schematic diagram of the inner claw without protective rubber pad in the lifting tool of the present invention;

[0026] Figure 13 Schematic diagram of the outer claw without protective rubber pad in the lifting tool of the present invention;

[0027] Figure 14 is a schematic diagram of a lifting ring in a lifting tool of the present invention;

[0028] Figure 15 Schematic diagram of inner and outer claw fixing blocks in the lifting tool of the present invention;

[0029] Figure 16 Schematic diagram of the inner claw 2 with protective rubber pad in the lifting tool of the present invention;

[0030] Figure 17Schematic diagram of the outer claw 2 with protective rubber pad in the lifting tool of the present invention;

[0031] Figure 18 is a schematic diagram of a manual crank in the lifting tool of the present invention;

[0032] Figure 19 is a schematic diagram of a protective rubber pad in a lifting tool of the present invention;

[0033] Figure 20 Schematic diagram of the inner claw 2 with protective rubber pad in the lifting tool of the present invention;

[0034] Figure 21 Schematic diagram of the outer claw 2 with protective rubber pad in the lifting tool of the present invention.

[0035] In the figure, 1. large bearing, 2. inner claw 1, 3. swing arm, 4. left claw fixing block, 5. left-hand slider, 6. upper crossbeam, 7. lifting ring, 8. hinge pin, 9. right-hand slider, 10. left-hand and right-hand drive shafts, 11. manual crank, 12. fixing nut, 13. right claw fixing block, 14. inner claw 2, 15. outer claw 1, 16. outer claw 2, 17. protective rubber pad. DETAILED DESCRIPTION

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

[0037] The terms “up and down” and “left and right” used in the following description refer only to the spatial positions shown in the drawings and should not be understood as limitations on the connection relationships of related components. The same applies to actual installation positions.

[0038] Reference Figure 6 The method of the present invention is a large bearing 1 that does not have a lifting threaded hole. The applicable scope is that the inner ring is greater than 500mm and the outer circle is less than 1400mm.

[0039] Reference Figure 1The structure of the lifting tool used in the method of the present invention is, including a lifting ring 7 and an upper crossbeam 6, the lifting ring 7 is installed in the middle position of the upper surface of the upper crossbeam 6, and the lifting ring 7 is plugged into the upper crossbeam 6; the cantilever of the upper crossbeam 6 has four mounting holes horizontally opened from the outside to the inside on both sides of the longitudinal direction, and two swing arms 3 are hingedly connected to the mounting holes at symmetrical positions on both sides using hinge pins 8; the middle part of the two swing arms 3 on the left is hinged with a left-handed slider 5, and the middle part of the two swing arms 3 on the right is hinged with a right-handed slider 9, and the left-handed slider 5 and the right-handed slider are hinged. Block 9 is jointly fitted with a left and right rotation drive shaft 10, and a manual crank 11 is provided at the outer end of the left and right rotation drive shaft 10; the lower portion of the two swing arms 3 on the left is fixed with a left claw fixing block 4, and the left claw fixing block 4 is downwardly mounted with an inner claw or outer claw, and the lower portion of the two swing arms 3 on the right is fixed with a right claw fixing block 13, and the right claw fixing block 13 is symmetrically mounted with an inner claw or outer claw of the same structure, and the top end of all the inner claws or outer claws extends from the left claw fixing block 4 or the right claw fixing block 13 and is mounted with a fixing nut 12 and (or) a safety nut.

[0040] The inner claws used in the present invention are divided into inner claw 1 2 and inner claw 2 14 according to the size and precision requirements of the large bearing 1. Similarly, the outer claws are divided into outer claw 15 and outer claw 2 16 according to the size and precision requirements of the large bearing 1.

[0041] Reference Figure 7 Four horizontal mounting holes are symmetrically opened on both sides of the upper crossbeam frame 6, and a socket is provided in the middle.

[0042] Reference Figure 8 A circular hole of φ20H7 is provided in the middle of each swing arm 3.

[0043] Reference Figure 9 、 Figure 10 The left-hand slider 5 has a left-hand thread in its center through hole, with a specification of M20. A hinged rod is fixed to each radially outward side of the center through hole, which is used to be inserted into the circular hole of the swing arm 3. The right-hand slider 9 has the same size and structure as the left-hand slider 5, but the difference is that the center through hole of the right-hand slider 9 has a right-hand thread in its center through hole, with a specification of M20.

[0044] Reference Figure 11 The middle section of the left-hand and right-hand drive shaft 10 is a polished rod. The left and right sections of the shaft are respectively threaded with left-hand and right-hand external threads. The left-hand external thread (M20) mates with the left-hand slider 5, while the right-hand external thread (M20) mates with the right-hand slider 9. Operating the manual crank 11 controls the distance between the right-hand and left-hand sliders 9 and 5.

[0045] Reference Figure 14 The upper part of the lifting ring 7 is a ring and the lower part is a plug rod. The lifting ring 7 extends into the jack in the middle of the upper crossbeam frame 6 through the plug rod and is fixed reliably.

[0046] Reference Figure 15 The left claw fixing block 4 is consistent with the right claw fixing block 13 in structure. Two pairs of through holes (specification is φ21) are vertically opened in the upper and lower beams of the rectangular frame to facilitate the passage of the upper straight rod section of the inner claw or outer claw.

[0047] Reference Figure 18 The fixed head of the manual crank 11 is fixedly connected with one end of the left and right rotation transmission shaft 10, and the other end of the manual crank 11 is a handshake position, which is manually shaken.

[0048] Reference Figure 19 The protective rubber pad 17 is made of rubber material and is completely wrapped around the surface of the inner claw or the outer claw to prevent the large bearing 1 from being scratched when hooking.

[0049] The lifting method of the large bearing lifting tool of the present invention adopts the above-mentioned lifting tool and is implemented according to the following steps:

[0050] Step 1: Determine the installation position of the swing arm 3 and hinge the swing arm 3 to the upper crossbeam 6.

[0051] Select the appropriate mounting hole position according to the size of the large bearing 1, divide the four swing arms 3 into two groups and connect them to the symmetrical mounting holes on both sides of the upper crossbeam 6 through hinge pins 8;

[0052] Step 2: Install the right-hand slider 9 and the left-hand slider 5.

[0053] A φ20H7 circular hole is opened in the middle of each of the four swing arms 3, which is respectively plugged into the φ20f7 hinged rod in the middle of the left-hand slider 5 and the right-hand slider 9. The left-hand slider 5 and the right-hand slider 9 can rotate around the hinged rod in the circular hole of the swing arm 3 to adapt to the installation angle when the swing arm 3 is tilted;

[0054] Step 3: Connect the left and right rotation transmission shafts 10.

[0055] The left-hand and right-hand drive shaft 10 is threadedly connected with the left-hand slider 5 and the right-hand slider 9. One end of the left-hand and right-hand drive shaft 10 is a left-hand external thread M20 that cooperates with the left-hand slider 5, and the other end is a right-hand external thread M20 that cooperates with the right-hand slider 9;

[0056] Step 4: Install the left claw fixing block 4 and the right claw fixing block 13.

[0057] Weld the left claw fixing block 4 and the right claw fixing block 13 to the lower part of the swing arm 3 on both sides respectively, so that the left claw fixing block 4 and the right claw fixing block 13 and the swing arm 3 on which they are located are made into two rigid wholes (welding here can improve the rigidity and facilitate the overall adjustment);

[0058] Step 5: Install the appropriate inner or outer claws.

[0059] In the through holes of the left claw fixing block 4 and the right claw fixing block 13, select the appropriate inner claw or outer claw according to the size of the large bearing 1, extend the upper straight section of the inner claw or outer claw into the through hole, and fix the exposed upper end with the fixing nut 12 (specification is M20);

[0060] Step 6: Install the lifting ring 7.

[0061] Connect the lifting ring 7 to the upper crossbeam 6 securely;

[0062] Step 7: Hook and connect with large bearing 1.

[0063] First, according to the actual size of the large bearing 1, use the inner claw 2 to hook on the inner ring of the large bearing 1; or use the outer claw 15 to hook on the outer ring of the large bearing 1; if the installation environment requirements of the large bearing 1 are very high, use Figure 16, Figure 17 、 Figure 20 and Figure 21 The inner claw 14 and outer claw 16 with protective rubber pads 17 shown in the figure protect the surface finish of the large bearing 1, avoid bumps and scratches on the surface, and make the installation more precise;

[0064] Then, manually rotate the manual crank 11 to drive the left-hand slider 5 and the right-hand slider 9 to move in the same direction or opposite direction. As the left-hand slider 5 and the right-hand slider 9 move, the swing arms 3 at both ends are driven to swing inward or outward at the same time, so that the four inner claws or the four outer claws are close to the large bearing 1, firmly fixing the large bearing 1. After it is firmly fixed, the lifting can be carried out.

[0065] Example 1

[0066] According to the above steps of the present invention, when "installing the appropriate inner or outer claw" in step 5, refer to Figure 2 、 Figure 12 , an inner claw 2 without a protective rubber pad is used, two inner claws 2 are installed downward on the left claw fixing block 4, and two inner claws 2 with the same structure are symmetrically installed on the right claw fixing block 13. The lower ends of the four inner claws 2 are all tilted outward and upward to facilitate hooking the inner ring of the large bearing 1; other components and structures are consistent with the above-mentioned method steps.

[0067] Example 2

[0068] According to the above steps of the present invention, when "installing the appropriate inner or outer claw" in step 5, refer to Figure 3 、 Figure 13 , an outer claw 15 without a protective rubber pad is used, two outer claws 15 are installed downward on the left claw fixing block 4, and two outer claws 15 of the same structure are symmetrically installed on the right claw fixing block 13. The lower ends of the four outer claws 15 are all tilted inward and upward to facilitate hooking the outer ring of the large bearing 1; other components and structures are consistent with the above-mentioned method steps.

[0069] Example 3

[0070] According to the above steps of the present invention, when "installing the appropriate inner or outer claw" in step 5, refer to Figure 4 、 Figure 16 、 Figure 20 , an inner claw 2 14 with a protective rubber pad is used, two inner claws 2 14 are installed downward on the left claw fixing block 4, and two inner claws 2 14 of the same structure are symmetrically installed on the right claw fixing block 13. The lower ends of the four inner claws 2 14 are extended horizontally outward to facilitate hooking the inner ring of the large bearing 1; other components and structures are consistent with the above-mentioned method steps.

[0071] Example 4

[0072] According to the above steps of the present invention, when "installing the appropriate inner or outer claw" in step 5, refer to Figure 5 、 Figure 17 、 Figure 21 , using outer claws 2 16 with protective rubber pads, the left claw fixing block 4 is downwardly installed with two outer claws 2 16, and the right claw fixing block 13 is symmetrically installed with two outer claws 2 16 of the same structure, and the lower ends of the four outer claws 2 16 are all extended horizontally inward to facilitate hooking the outer ring of the large bearing 1; other components and structures are consistent with the above-mentioned method steps.

[0073] The assembly process of the lifting tool of the present invention can also adjust the order of individual steps according to the site environment and the size specifications of the large bearing 1, so as to achieve better adaptability and smooth implementation of the lifting.

[0074] The method of the present invention has a wide adjustable range and can safely be used with large bearings 1 with inner rings larger than 500 mm and outer diameters smaller than 1400 mm. Both ends of the left-hand and right-hand drive shafts 10 have M24x2.5 threads, which have excellent self-locking properties and prevent the left-hand and right-hand sliders 5 and 9 from moving during the lifting process, ensuring the stability and safety of the swing arm 3 throughout the entire process.

Claims

1. A lifting method for a large bearing lifting tool, characterized in that: A lifting tool is used, the structure of which includes a lifting ring (7) and an upper crossbeam (6), the lifting ring (7) being installed at the middle position of the upper surface of the upper crossbeam (6); four mounting holes are respectively opened horizontally from the outside to the inside on both longitudinal sides of the cantilever of the upper crossbeam (6), and two swing arms (3) are respectively hinged in the mounting holes at symmetrical positions on both sides; a left-handed slider (5) is hinged in the middle of the two swing arms (3) on the left, and a right-handed slider (9) is hinged in the middle of the two swing arms (3) on the right, and a left-handed and right-handed transmission shaft (10) is commonly set in the left-handed slider (5) and the right-handed slider (9); a left-handed claw fixing block (4) is fixed at the lower part of the two swing arms (3) on the left, and an inner claw or an outer claw is installed downwardly on the left-handed claw fixing block (4); a right-handed claw fixing block (13) is fixed at the lower part of the two swing arms (3) on the right, and an inner claw or an outer claw of the same structure is symmetrically installed on the right-handed claw fixing block (13). Follow these steps to implement: Step 1: Determine the installation position of the swing arm (3) and hinge the swing arm (3) to the upper crossbeam (6); Step 2: Install the right-hand slider (9) and the left-hand slider (5); Step 3: Connect the left and right rotation transmission shafts (10); Step 4: Install the left claw fixing block (4) and the right claw fixing block (13); Step 5: Install the inner or outer claws; Step 6: Connect the lifting ring (7) to the upper crossbeam (6); Step 7: Hook and connect the lifting tool to the large bearing (1), connect the lifting ring (7) to the lifting equipment, and start lifting. The specific process is: First, according to the actual size of the large bearing (1), use the inner claw to hook on the inner ring of the large bearing (1); or use the outer claw to hook on the outer ring of the large bearing (1); Then, manually rotate the manual crank (11) to drive the left-hand slider (5) and the right-hand slider (9) to move in the same direction or in the opposite direction. As the left-hand slider (5) and the right-hand slider (9) move, the swing arms (3) at both ends are driven to swing inward or outward at the same time, so that the four inner claws or the four outer claws are close to the large bearing (1), firmly fixing the large bearing (1). Finally, the lifting ring (7) is connected to the lifting equipment and the lifting operation begins.

2. The lifting method of the large bearing lifting tool according to claim 1, characterized in that: In step 1, the specific process is: The mounting hole position is selected according to the size of the large bearing (1), and the four swing arms (3) are divided into two groups and connected to the mounting holes symmetrical on both sides of the upper crossbeam (6) through hinge pins (8).

3. The lifting method of a large bearing lifting tool according to claim 1, characterized in that: In step 2, the specific process is: A circular hole is formed in the middle of each of the four swing arms (3), which are respectively plugged into the hinged rods in the middle of the left-hand slider (5) and the right-hand slider (9), so that the left-hand slider (5) and the right-hand slider (9) can rotate freely around the hinged rod in the circular hole of the swing arm (3), thereby adapting to the installation angle when the swing arm (3) is tilted.

4. The lifting method of a large bearing lifting tool according to claim 1, characterized in that: In step 3, the specific process is: The left-hand and right-hand drive shafts (10) are threadedly connected to the left-hand slider (5) and the right-hand slider (9). One end of the left-hand and right-hand drive shafts (10) is a left-hand external thread that cooperates with the left-hand slider (5), and the other end is a right-hand external thread that cooperates with the right-hand slider (9).

5. The lifting method of a large bearing lifting tool according to claim 1, characterized in that: In step 4, the specific process is: The left claw fixing block (4) and the right claw fixing block (13) are respectively welded to the lower parts of the swing arms (3) on both sides, so that the left claw fixing block (4) and the right claw fixing block (13) and the swing arms (3) are made into two rigid wholes.

6. The lifting method of a large bearing lifting tool according to claim 1, characterized in that: In step 5, the specific process is: Select an appropriate inner claw or outer claw according to the size of the large bearing (1), extend the upper straight section of the inner claw or outer claw into the through hole of the left claw fixing block (4) and the right claw fixing block (13) respectively, and fix the exposed upper end with a fixing nut (12).

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