A method for assembling a lead core of a seismic isolation bearing and a hoisting tooling

Abstract

The present invention discloses a lifting fixture, which includes: a lifting ring, a sleeve, an annular petal, a pressing screw and a guide rod. The sleeve is an inverted cylindrical shape, and the lifting ring is fixed to the outside of the bottom of the cylinder. A plurality of annular petals are arranged at intervals in the sleeve, and an anti-slip groove is provided on the inner side of the annular petal. The periphery of the sleeve is provided with radial screw holes and guide holes. The pressing screw is connected with the screw hole, and the top end of the pressing screw is pressed against the annular petal to press the lead core. The lead core assembly method of the seismic isolation bearing of the present invention is to use the lifting fixture to clamp one end of the lead core. When the lifting fixture is lifted, the other end of the lead core is exposed from the bottom of the lifting fixture and is always in a vertical position, so that the lead core can be smoothly inserted into the lead core hole of the seismic isolation bearing. Ensure that the axial direction of the lead core is consistent with the direction of the lead core hole during the lead pressing assembly process of the seismic isolation bearing, so as to avoid the lead core hole wall being scratched by the lead core or the lead core being squeezed and deformed, thereby ensuring the quality of the lead core rubber seismic isolation bearing and improving the qualified rate of lead pressing.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering shock absorption, and in particular to a seismic isolation support lead core assembly method and a hoisting tool. Background Art

[0002] Lead-rubber isolation bearings are a type of building isolation bearing. Compared to comparable rubber isolation bearings, they offer superior flexibility, high load-bearing capacity, and a high damping ratio. The lead core, located at the center of the bearing body, exhibits excellent plasticity, giving the bearing excellent self-resetting properties. This eliminates the need for a centripetal damping mechanism and achieves seismic isolation by simply swinging the lead core to extend the natural vibration period of the underlying structure. However, because the lead core hole is made of rubber, dimensional accuracy is difficult to ensure. The lead pressing process must ensure that the axial direction of the lead core aligns with the hole to ensure the quality of the lead-rubber isolation bearing. Existing techniques typically use a lifting rope to sling the lead core, hoisting it at a 45-degree angle to the lead core hole in the rubber isolation bearing. The operator then manually straightens the lead core, aligning it with the hole, and inserts it into the hole. This assembly method makes it difficult to align the lead core axially with the hole, and the rubber inside the lead core hole is easily scratched. At the same time, the lead core is prone to excessive burrs, affecting the effective weight parameters of the lead core and resulting in a low first-time assembly pass rate. In addition, this method of tying the lead core with a rope can easily cause the lead core to fall, causing damage to the lead core, and even damaging equipment, injuring workers, and causing installation accidents.

[0003] After patent search, the following patents are related to this application:

[0004] 1. The Chinese invention patent with application number "201410385289.3", application date "2014.08.06", publication number "CN104120651A", publication date "2014.10.29", title "One-way lead rubber isolation bearing", applicant "Nanjing University of Technology", discloses a one-way seismic isolation lead rubber bearing, including sandwich steel plate, sandwich rubber, outer rubber, upper sealing plate, cover plate, lead core, polytetrafluoroethylene slide plate, The patent includes a stainless steel plate, an upper support plate, a lower support plate, a limit plate, an upper connecting plate, a lower connecting plate, anchor bolts, lateral stainless steel strips, and guide strips. The lead core is tightly pressed into the reserved hole in the support, and a cover plate is provided on the lead core. The polytetrafluoroethylene slide plate and the stainless steel plate form the support sliding surface, and the stainless steel plate and the polytetrafluoroethylene slide plate are lubricated with silicone grease. The upper sealing plate is bonded to the surface-activated polytetrafluoroethylene slide plate by applying epoxy resin. Limit plates are provided on each side of the upper support plate, allowing longitudinal sliding but restricting lateral movement. However, the patent does not cover the lead core assembly method or lifting tooling.

[0005] 2. The Chinese invention patent with application number "201610565647.8", application date "2016.07.18", publication number "CN106223489A", publication date "2016.12.14", title "Lead rubber seismic isolation bearing, intelligent bearing and bearing monitoring system", and applicant "Shenzhen Municipal Design Institute Co., Ltd.", discloses a lead rubber seismic isolation bearing, an intelligent bearing and a bearing monitoring system, which belongs to the field of bearing technology. The lead rubber seismic isolation bearing of the present invention includes a top bearing plate, a bottom bearing plate, a lead rubber bearing body and a pad, and a pressure sensing unit is provided between the top bearing plate and the pad, or between the bottom bearing plate and the pad. The intelligent bearing includes a data acquisition unit, a data output unit and a lead rubber seismic isolation bearing, and the data acquisition unit transmits the bearing pressure measured by the pressure sensing unit to the data output unit. The bearing monitoring system includes a data acquisition unit, a data output unit, a monitoring center, and a lead-rubber isolation bearing. However, the patent does not cover the lead-rubber assembly method and lifting tooling.

[0006] 3. The Chinese invention patent with application number "202011416279.3", application date "2020.12.04", publication number "CN112523577A", publication date "2021.03.19", name "A lead core rubber bearing with the addition of hindered phenol antioxidants", and applicant "Shenyang Jianzhu University" discloses a lead core rubber bearing with the addition of hindered phenol antioxidants, including an upper connecting plate, a lower connecting plate, an upper inner sealing steel plate, a lower inner sealing steel plate, a rubber sheet, a stiffening steel plate, an outer layer of rubber and a lead core; a lead core is provided in the middle between the upper connecting plate and the lower connecting plate; a plurality of connecting bolts are provided on the periphery of the lead core; the plurality of bolts are arranged in a circle, and the two ends of the plurality of bolts are fixedly connected to the upper connecting plate and the lower connecting plate; a lower inner sealing steel plate, a buffer plate group, and an upper inner sealing steel plate are sleeved on the lead core and the bolts. Oxygen has a significant impact on bearing corrosion during offshore structural construction. When designing seismic-resistant lead-rubber bearings for foundation isolation, rubber aging and cracking must be considered. To improve the durability of the rubber, the invention incorporates an antioxidant—a hindered phenolic antioxidant—into the rubber to enhance the overall durability of the bearing. However, the patent also does not cover lead assembly methods or lifting equipment. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a seismic isolation bearing lead core assembly method and a lifting tool for the defects existing in the prior art.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: a method for assembling lead core of a seismic isolation bearing: first, the seismic isolation bearing is placed horizontally so that the lead core hole on the seismic isolation bearing is in a vertical direction, then the lead core is lifted so that the axial direction of the cylindrical lead core is in a vertical direction, the lead core is lifted to the top of the lead core hole, and then the lead core is lowered vertically and inserted into the lead core hole. During the lead pressing process, it is ensured that the axial direction of the lead core is consistent with the direction of the lead core hole, so as to avoid the lead core hole wall being scratched by the lead core or the lead core being squeezed and deformed, thereby ensuring the quality of the lead core rubber seismic isolation bearing and improving the qualified rate of lead pressing.

[0009] Furthermore, a lifting fixture is used to clamp one end of the cylindrical lead core, and the lead core is lifted by the lifting fixture so that the axial direction of the lifted lead core is always vertical, so that the lower end of the lead core can be smoothly inserted into the lead core hole.

[0010] The above-mentioned seismic isolation bearing lead core assembly method includes the following steps:

[0011] S1: Place the seismic isolation bearing on the assembly table with the lead core hole in the vertical direction, and place the lead core on the assembly table with the axis in the vertical direction;

[0012] S2: Loosen the compression screw on the lifting fixture so that the inner diameter of the annular petals composed of multiple annular petals is larger than the outer diameter of the lead core;

[0013] S3: Lifting the lifting fixture and placing it on the top of the lead core so that the multiple annular petals are located on the outer periphery of the lead core, tightening the clamping screw on the lifting fixture so that the multiple annular petals press against the outer periphery of the lead core to clamp the lead core;

[0014] S4: Lift the lifting fixture, move the lifting fixture, align the lead core clamped under the lifting fixture with the lead core hole of the seismic isolation support, and place the lower part of the lead core into the lead core hole;

[0015] S5: Loosen the compression screw on the lifting fixture. Multiple annular petals separate from the lead core radially under the action of the spring, loosening the clamped lead core. The lead core falls completely into the lead core hole under the action of gravity and the press, completing the lead core assembly process.

[0016] A lifting fixture according to the lead core assembly method for a seismic isolation bearing comprises a lifting ring, a sleeve, and a clamping component. The sleeve is an inverted cylinder, the lifting ring is fixed to the outside of the bottom of the cylinder, and a plurality of clamping components are movably arranged around the sleeve. The clamping components can press against the lead core along the radial direction of the sleeve to clamp the lead core. When the lifting fixture is lifted, the axis of the lead core is always vertical, so that the axial direction of the lead core is aligned with the direction of the lead core hole, preventing the lead core from being scratched by the lead core or being squeezed and deformed, thereby ensuring the quality of the lead core rubber seismic isolation bearing and improving the qualified rate of lead pressing.

[0017] Furthermore, the clamping component includes: an annular flap, a compression screw, and a guide rod. The sleeve wall is provided with a screw hole and a guide hole. The screw hole is arranged along the radial direction of the sleeve. The compression screw is engaged with the screw hole. The top end of the compression screw is pressed into the bolt positioning pit on the outer side of the annular flap. The guide rod passes through the guide hole and is fixedly connected to the outer side of the annular flap. One end of the lead core is clamped by a lifting fixture. When the lifting fixture is lifted, the other end of the lead core is exposed from below the lifting fixture and is always in a vertical position, so that the lead core can be smoothly inserted into the lead core hole.

[0018] Furthermore, guide rods are provided on both sides of the compression screw, and the guide holes on the sleeve wall are arranged parallel to the screw holes, so that the compression screw and the guide rods are parallel. During the pressing process of the annular petal, the pressing direction of the compression screw is consistent with the moving direction of the annular petal.

[0019] Further, a spring is also provided between the outer end of the guide rod and the cylindrical wall. After unscrewing the compression screw, the spring moves the annular flap radially outwards so that the annular flap recovers its initial position.

[0020] Furthermore, the inner diameter of the annular petal is 2 to 6 mm larger than the outer diameter of the lead core, so that the lead core can be smoothly inserted into the lifting tool.

[0021] Furthermore, an anti-skid groove is provided on the inner side of the annular petal, and the anti-skid groove includes a triangular groove or a sawtooth groove, so as to increase the friction between the annular petal and the outer periphery of the lead core, prevent the lead core from falling, and ensure the safety of the lifting process.

[0022] Furthermore, the sawtooth groove is composed of radial edges and oblique edges, and the annular flap is installed in the sleeve with the sawtooth groove opening facing obliquely downward. The sawtooth indentations on the outer circumference of the lead core are oriented in a direction of being smaller at the bottom and larger at the top, so that the lead core can be smoothly inserted into the lead core hole.

[0023] The beneficial effects of the present invention are as follows: one end of the lead core is clamped by a lifting fixture, and when the lifting fixture is lifted, the other end of the lead core is exposed from below the lifting fixture and is always in a vertical position, so that the lead core can be smoothly inserted into the lead core hole of the seismic isolation support. This ensures that during the lead pressing assembly process of the seismic isolation support, the axial direction of the lead core is consistent with the direction of the lead core hole, preventing the lead core from being scratched by the lead core or being squeezed and deformed, thereby ensuring the quality of the lead core rubber seismic isolation support and improving the qualified rate of the lead pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a cross-sectional diagram of the seismic isolation bearing.

[0025] Figure 2 This is a front view schematic diagram of the first embodiment of the lifting tooling.

[0026] Figure 3 for Figure 2 A-A cross-sectional view,

[0027] Figure 4 This is a bottom view of the first embodiment of the lifting tooling.

[0028] Figure 5 This is a bottom view of the second embodiment of the lifting tooling.

[0029] Figure 6 This is a cross-sectional diagram of the lifting tool holding the lead core.

[0030] Figure 7 for Figure 6 A partial enlarged diagram of B in the middle (Lifting tooling embodiment 3),

[0031] Figure 8 This is a schematic diagram of the lead core being pressed by the annular petal (Example 3 of the lifting tooling),

[0032] Figure 9 for Figure 6 A partial enlarged diagram of B in the middle (hoisting tooling embodiment 4),

[0033] Figure 10 This is a schematic diagram of the lead core being pressed by the annular petal (Example 4 of the lifting tooling),

[0034] Figure 11 This is a cross-sectional diagram of the hoisting tool before installing the lead core into the seismic isolation support.

[0035] Figure 12 This is a cross-sectional diagram of the lifting tool installing the lead core into the seismic isolation support.

[0036] Figure 13 Schematic diagram of the cross-section after the lifting tool installs the lead core into the seismic isolation bearing.

[0037] In the figure: 1—lifting ring, 2—sleeve, 3—tension bolt, 4—guide rod, 5—spring, 6—annular flap, 601—triangular groove, 602—bolt positioning pit, 603—serrated groove, α—triangular groove angle, β—serrated groove angle, 7—lead core, 701—triangular indentation, 702—serrated indentation, r—indentation bevel angle, 8—lead core hole, 9—cover plate, 10—sealing steel plate, 11—rubber body, 12—partition plate, C—maximum inner diameter of annular flap, D—outer diameter of lead core, E—inner diameter of lead core hole, V—moving direction of lifting fixture, Z—vertical. DETAILED DESCRIPTION

[0038] The present invention will be further described below through specific embodiments and in conjunction with the accompanying drawings:

[0039] like Figure 1As shown, the lead rubber isolation bearing is cylindrical and is constructed by vulcanizing a rubber body 11 with multiple parallel, spaced-apart partitions 12, which are then sealed at the upper and lower ends with steel sealing plates 10. An axial lead hole 8 is provided at the center of the lead rubber isolation bearing. During assembly, a cover plate 9 is installed at the bottom of the hole, followed by the insertion of the lead core 7 into the hole, and finally, the cover plate 9 is placed over the hole.

[0040] Since the wall of the lead core hole 8 is made of rubber, the dimensional accuracy of the inner diameter E of the lead core hole is difficult to guarantee. The existing technology usually uses a lifting rope to bind and lift the lead core 7, and the lead core 7 is lifted at a 45-degree angle to the lead core hole 8 position of the lead core rubber seismic isolation bearing. Then the operator manually straightens the lead core 7, aligns it with the lead core hole 8, and inserts the lead core 7 into the lead core hole 8. When this assembly method is used, it is difficult for the lead core 7 to align the lead core hole 8 axially. The rubber on the wall of the lead core hole 8 will be scratched and fallen off by the lead core 7, resulting in gaps in the assembled lead core rubber seismic isolation bearing, affecting the seismic isolation performance. At the same time, due to the low hardness of the lead core 7, it is easily squeezed and deformed by the sealing steel plate 10 and the partition 12, making it difficult to insert the lead core 7 into the lead core hole 8. Even after the lead core 7 is inserted into the lead core hole 8, the deformed lead core 7 still partially exposes the lead core hole 8, making it impossible to cover the cover plate 9. In addition, when the lead core 7 is tied up with the rope, the lead core 7 is easy to fall, causing damage to the lead core 7, or even damaging equipment, injuring workers, and causing installation accidents.

[0041] The lead core assembly method of the seismic isolation bearing of the present invention is: first place the seismic isolation bearing horizontally so that the lead core hole 8 on the seismic isolation bearing is in a vertical direction, then use a lifting fixture to clamp one end of the cylindrical lead core 7, and lift the lead core 7 through the lifting fixture so that the axial direction of the lead core after being lifted is always in a vertical direction. Lift the lead core 7 to the top of the lead core hole 8, then lower the lead core 7 vertically and insert the lead core 7 into the lead core hole 8. Ensure that during the lead pressing process, the axial direction of the lead core 7 is consistent with the direction of the lead core hole 8 to avoid the lead core hole wall being scratched by the lead core 7 or the lead core 7 being squeezed and deformed. The good verticality of the lead core 7 ensures the quality of the lead core rubber seismic isolation bearing and improves the qualified rate of lead pressing, which reaches 99.5%.

[0042] The embodiment of the lifting tool of the present invention is as follows Figures 2 to 4As shown, it includes: a hanging ring 1, a sleeve 2, an annular petal 6, a tightening screw 3 and a guide rod 4. The sleeve 2 is an inverted cylindrical shape, and the hanging ring 1 is fixed to the outside of the bottom of the cylinder. A plurality of annular petals 6 are arranged at intervals in the sleeve 2 to form an intermittent ring. The maximum inner diameter C of the annular petal is 2 to 6 mm larger than the outer diameter D of the lead core. The inner side of the annular petal 6 is provided with an anti-slip groove or a pressure rib. The pressure rib is easy to form a groove on the periphery of the lead core 7. When the lead core 7 is inserted into the lead core hole 8, the groove on the periphery of the lead core 7 causes a gap to be formed between the lead core 7 and the hole wall of the lead core hole 8, which will affect the seismic isolation performance. The anti-slip groove will form a convex indentation on the periphery of the lead core 7. During the process of inserting the lead core 7 into the lead core hole 8, the convex indentation on the periphery of the lead core 7 will be squeezed flat. No gap will be formed between the lead core 7 and the lead core hole 8, so it is preferred to use an anti-slip groove.

[0043] Sleeve 2 is peripherally provided with radial screw holes and guide holes. A compression screw 3 engages with the screw holes, with its top end resting within a bolt positioning recess 602 on the outside of annular flap 6. Guide rods 4 are provided on either side of compression screw 3, one end of which passes through the guide holes and is fixedly connected to annular flap 6. The other end of guide rod 4, outside sleeve 2, is provided with a larger diameter end cap, with a compression spring 5 interposed between the end cap and sleeve 2.

[0044] The second embodiment of the lifting tool of the present invention is as follows Figure 5 As shown, the difference from the first embodiment is that the guide hole in the wall of the sleeve 2 is arranged parallel to the screw hole, so that the pressing screw 3 is parallel to the guide rod 4. During the pressing of the annular flap 6, the pressing direction of the pressing screw 3 is aligned with the movement direction of the annular flap 6. This prevents the two radially arranged guide rods 4 from obstructing the movement of the annular flap 6.

[0045] Figure 6 This is a cross-sectional view of the lifting fixture holding the lead core 7: By tightening the compression screw 3, the annular flap 6 is pressed against the periphery of one end of the lead core 7, clamping the lead core 7 at the lower end of the lifting fixture. During the lifting process, the other end of the lead core 7 is exposed from below the lifting fixture and remains vertical, facilitating smooth insertion of the lead core 7 into the lead core hole 8.

[0046] The third embodiment of the lifting tool of the present invention is as follows Figures 7 to 8 As shown, a triangular groove 601 is provided on the inner side of the annular flap 6. When pressed against the outer periphery of the lead core 7 by the annular flap 6, a triangular indentation 701 is formed. When the angle α of the triangular groove is greater than 90°, the indentation angle r is less than 45°. During the insertion of the lead core 7 into the lead core hole 8, the triangular indentation 701 on the outer periphery of the lead core 7 is less likely to scratch the wall of the lead core hole 8, thereby improving the quality of the lead pressing assembly.

[0047] The fourth embodiment of the lifting tool of the present invention is as follows Figures 9 to 10As shown, the difference from Example 3 is that the anti-slip groove on the inner side of the annular flap 6 is a serrated groove 603, which consists of a radial edge and a beveled edge. The annular flap 6 is installed in the sleeve 2 with the opening of the serrated groove 603 facing obliquely downward. The outer periphery of the lead core 7 is pressed by the annular flap 6, forming a serrated indentation 702. When the serrated groove angle β is greater than 45°, the indentation angle r is less than 45°. During the insertion of the lead core 7 into the lead core hole 8, the serrated indentation 702 on the outer periphery of the lead core 7 is less likely to scratch the wall of the lead core hole 8, thereby improving the quality of the lead pressing assembly.

[0048] The seismic isolation support lead core assembly method of the present invention is as follows Figures 11 to 13 As shown, the following steps are included:

[0049] S1: Place the seismic isolation support on the assembly table with the lead core hole 8 in the vertical direction, and place the lead core 7 on the assembly table with the axis in the vertical direction;

[0050] S2: Loosen the compression screw 3 on the lifting fixture so that the inner diameter C of the annular petals composed of multiple annular petals 6 is larger than the outer diameter D of the lead core;

[0051] S3: Lift the lifting fixture and place it on the top of the lead core 7 so that the multiple annular petals 6 are located on the outer periphery of the lead core 7. Tighten the pressing screw 3 on the lifting fixture so that the multiple annular petals 6 press against the outer periphery of the lead core 7 to clamp the lead core 7.

[0052] S4: Lift the lifting fixture, move the lifting fixture, align the lead core 7 clamped under the lifting fixture with the lead core hole 8 of the seismic isolation support, and place the lower part of the lead core 7 into the lead core hole 8;

[0053] S5: Loosen the compression screw 3 on the lifting fixture, and the multiple annular petals 6 separate from the lead core 7 in the radial direction under the action of the spring 5, loosening the clamped lead core 7. The lead core 7 falls completely into the lead core hole 8 under the action of gravity and the press, completing the lead core 7 assembly process.

[0054] In summary, the beneficial effects of the present invention are as follows: one end of the lead core is clamped by a lifting fixture, and when the lifting fixture is lifted, the other end of the lead core is exposed from below the lifting fixture and is always in a vertical position, so that the lead core can be smoothly inserted into the lead core hole of the seismic isolation support. During the lead pressing assembly process of the seismic isolation support, the axial direction of the lead core is ensured to be consistent with the direction of the lead core hole, thereby preventing the lead core hole wall from being scratched by the lead core or the lead core from being squeezed and deformed, ensuring the quality of the lead core rubber seismic isolation support and improving the qualified rate of the lead pressing.

[0055] The above embodiments are only for the purpose of illustrating the present invention, and are not intended to limit the present invention. Those skilled in the art may make various changes or modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also fall within the scope of protection of the present invention, and the scope of protection of the present invention should be defined by the claims.

Claims

1. A seismic isolation bearing lead core assembly method, characterized by: First, the seismic isolation support is placed horizontally so that the lead core hole on the seismic isolation support is in a vertical direction. Then, the lead core is lifted so that the axial direction of the cylindrical lead core is in a vertical direction. The lead core is lifted to the top of the lead core hole. Then, the lead core is lowered vertically and inserted into the lead core hole. One end of the cylindrical lead core is clamped by a lifting fixture. The lead core is lifted by the lifting fixture so that the axial direction of the lifted lead core is always in a vertical direction. The following steps are included: S1: placing the seismic isolation support on the assembly table with the lead core hole (8) in the vertical direction, and placing the lead core (7) on the assembly table with the axis in the vertical direction; S2: Loosening the compression screw (3) on the lifting fixture so that the inner diameter (C) of the annular petals (6) is larger than the outer diameter (D) of the lead core; S3: lifting the lifting tool and placing it on the top of the lead core (7), so that the plurality of annular petals (6) are located on the outer periphery of the lead core (7), and tightening the pressing screw (3) on the lifting tool so that the plurality of annular petals (6) are pressed against the outer peripheral surface of the lead core (7), thereby clamping the lead core (7); S4: Lift the hoisting tool, move the hoisting tool, align the lead core (7) clamped under the hoisting tool with the lead core hole (8) of the seismic isolation support, and place the lower part of the lead core (7) into the lead core hole (8); S5: Loosen the compression screw (3) on the lifting fixture, and the multiple annular petals (6) are separated from the lead core (7) in the radial direction under the action of the spring (5), loosening the clamped lead core (7), and the lead core (7) completely falls into the lead core hole (8) under the action of gravity and the press, completing the lead core (7) assembly process.

2. The hoisting tool for the lead core assembly method of the seismic isolation bearing according to claim 1 is characterized in that: The invention comprises a lifting ring (1), a sleeve (2) and a clamping component, wherein the sleeve (2) is in the shape of an inverted cylinder, the lifting ring (1) is fixed to the outside of the bottom of the cylinder, and a plurality of clamping components are movably arranged around the sleeve (2); the clamping components can be pressed on the periphery of the lead core (7) along the radial direction of the sleeve (2) to clamp the lead core (7).

3. The hoisting tool for the lead core assembly method of the seismic isolation bearing according to claim 2 is characterized in that: The clamping component includes: an annular flap (6), a pressing screw (3) and a guide rod (4). A screw hole and a guide hole are provided on the wall of the sleeve (2). The screw hole is provided along the radial direction of the sleeve (2). The pressing screw (3) is matched with the screw hole and connected. The top end of the pressing screw (3) is pressed into the bolt positioning pit (602) on the outside of the annular flap (6). The guide rod (4) passes through the guide hole and is fixedly connected to the outside of the annular flap (6).

4. The hoisting tool for the lead core assembly method of the seismic isolation bearing according to claim 3 is characterized by: Guide rods (4) are respectively provided on both sides of the compression screw (3), and the guide holes on the wall of the sleeve (2) are arranged parallel to the screw holes, so that the compression screw (3) and the guide rods (4) are parallel.

5. The hoisting tool for the lead core assembly method of the seismic isolation bearing according to claim 4 is characterized in that: A spring (5) is also provided between the outer end of the guide rod (4) and the cylindrical wall.

6. The hoisting tool for the lead core assembly method of the seismic isolation bearing according to claim 5 is characterized in that: The inner diameter of the annular valve (C) is 2 to 6 mm larger than the outer diameter of the lead core (D).

7. The hoisting tool for the lead core assembly method of the seismic isolation bearing according to claim 6 is characterized in that: An anti-slip groove is provided on the inner side of the annular petal (6), and the anti-slip groove comprises a triangular groove (601) or a sawtooth groove (603).

8. The hoisting tool for the lead core assembly method of the seismic isolation bearing according to claim 7 is characterized in that: The sawtooth groove (603) consists of a radial edge and an oblique edge, and the annular flap (6) is installed in the sleeve (2) in a direction in which the opening of the sawtooth groove (603) faces obliquely downward.

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