Adjustable positioning seat for slewing bearing of tower crane and use method of adjustable positioning seat

Abstract

The invention discloses an adjustable positioning seat for a slewing bearing of a tower crane and a using method of the adjustable positioning seat, and relates to the field of building constructions.The adjustable positioning seat is characterized by comprising a positioning table, and a main bevel gear manually rotated through an operating component is mounted in the center of the top of the positioning table; the device has the advantages that the main bevel gear in the center of the top of the positioning table is manually rotated through the operating component, and transmission assemblies connected with the auxiliary bevel gears are driven to synchronously act through meshing transmission of the main bevel gear and the auxiliary bevel gears distributed around the main bevel gear in the circumferential direction; the main bevel gear is fixed through the operating component after the distance is matched with the diameter of a target slewing bearing, then the outer ring of the slewing bearing is installed on the mounting plates through the connecting pieces, and cost increase, stock pressure and period prolonging caused by replacement of the positioning base are avoided.

Description

Technical Field

[0001] This invention relates to the field of building construction, and more specifically, to an adjustable positioning seat for a tower crane slewing bearing and its method of use. Background Technology

[0002] In the construction industry, tower cranes are key lifting equipment, and the installation accuracy of their slewing bearings directly affects the overall operational stability and safety of the machine.

[0003] The positioning seats of existing tower crane slewing bearings are mostly fixed structures. The position of the mounting plate and the overall installation height are preset and fixed. It is impossible to flexibly adjust the matching position of the mounting plate according to the actual diameter of the slewing bearing, and it is also difficult to adjust the installation height of the slewing bearing according to the installation requirements of the construction site. As a result, the same positioning seat can only be used for a single size of slewing bearing. When replacing slewing bearings of different diameters, the entire positioning seat must be replaced. This not only increases construction costs, spare parts inventory pressure, and disassembly and commissioning cycle, but also easily causes assembly interference between the slewing bearing and other components of the tower crane due to height mismatch.

[0004] Therefore, in order to solve the above-mentioned technical problems, this application proposes an adjustable positioning seat for a tower crane slewing bearing and its usage method. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an adjustable positioning seat for tower crane slewing bearings and its usage method.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an adjustable positioning seat for a tower crane slewing bearing, comprising a positioning platform, wherein a main bevel gear is installed at the top center of the positioning platform and is manually rotated by an operating component. After being rotated to a suitable position, the main bevel gear is fixed by the operating component. Multiple secondary bevel gears are meshed on the main bevel gear and are distributed circumferentially around the main bevel gear. Each secondary bevel gear is connected to a transmission component. Multiple transmission components drive the synchronous movement of multiple mounting plates to adjust the position of the mounting plates, thereby adapting to slewing bearings of different diameters. The outer ring of the slewing bearing is mounted on the mounting plate through a connecting member. The bottom of the positioning platform is connected to the intermediate connecting seat on both sides by a support plate. The bottom of the intermediate connecting seat is equipped with a height adjustment component to adjust the installation height of the slewing bearing.

[0007] Preferably, a bearing A is embedded and fixed in the middle of the top of the positioning platform, a rotating rod A is fixedly connected in the inner ring of the bearing A, and the main bevel gear is fixed to the top of the rotating rod A.

[0008] Preferably, the operating component includes a lower open tube fixed to the bottom end of the rotating rod A. Multiple guide rails A arranged in a circular array are installed on the inner side wall of the lower open tube, and sliders A are slidably connected to the surface of each guide rail A. A connecting plate is fixedly connected between the sliders A. A vertical rod is fixedly connected to the bottom end of the connecting plate. The vertical rod extends out of the lower open tube, and a rotating plate is fixedly connected to its bottom end to facilitate the rotation of the main bevel gear.

[0009] Preferably, the rotating plate has multiple through holes A arranged in a circular array and extending through both the upper and lower surfaces of the rotating plate. The bottom end of the positioning platform is fixedly connected to multiple screws A opposite to the through holes A, and anti-loosening nuts A are threaded onto the outer side walls of each screw A.

[0010] Preferably, the transmission assembly includes a lead screw fixed to the surface of the secondary bevel gear away from the main bevel gear. A rotating rod B is fixedly connected to the other end of the lead screw, and a bearing B is sleeved on the outer side wall of the rotating rod B. The rotating rod B is fixed in the inner ring of the bearing B, and the outer ring of the bearing B is fixed to the top of the positioning platform. A rod sleeve is threadedly connected to the outer side wall of the lead screw. A guide rail B for sliding the slider B is installed on the top surface of the positioning platform parallel to the lead screw. The top end of the slider B is fixed to the bottom end of the rod sleeve, and the mounting plate is fixed to the top end of the rod sleeve.

[0011] Preferably, the height adjustment assembly includes a support column connected to the center of the bottom of the intermediate connecting seat, and an adjustment platform is fixedly connected to the bottom end of the support column. The adjustment platform has multiple through holes B arranged in a circumferential array and penetrating the upper and lower surfaces of the adjustment platform. A screw B is inserted into the interior of each through hole B, and a base plate is fixedly connected to the bottom end of the screw B. Anti-loosening nuts B are threadedly connected to the outer side walls of the screw B on both the upper and lower sides of the adjustment platform.

[0012] Preferably, the top of the base plate is equipped with a plurality of guide rails C arranged in a circular array for sliding of the slider C, and the adjustment platform is fixed between the plurality of sliders C.

[0013] Preferably, the support column and the positioning platform are detachably connected via a quick-release assembly.

[0014] Preferably, the quick-release assembly includes a square slot base fixed to the center of the bottom of the positioning platform and having an opening at the bottom, and a square block fixed to the top of the support column and capable of being inserted into the square slot base. The square slot base has through holes C on all four sides, and the square block has screw holes on all four sides. When the square block is inserted into the square slot base, the through holes C and screw holes are aligned. Guide rails D for sliding slider D are fixedly connected to the four sides of the square slot base below the through holes C. A rotating rod C is rotatably connected to the top of each slider D via a bearing C. The rotating rod C is fixed in the inner ring of the bearing C, and the outer ring of the bearing C is fixed to the slider D. A screw C, threaded to the screw hole, is fixedly connected to the end of the rotating rod C facing the square slot base. A handle for easy rotation is fixedly connected to the other end of the screw C.

[0015] The method of using the adjustable positioning seat of the tower crane slewing bearing described above includes the following steps: Step 1: Align the square block at the bottom of the lower part of the positioning seat with the square slot at the bottom of the upper part of the positioning seat and insert it, so that the through holes C on the four sides of the square slot are precisely aligned with the screw holes on the four sides of the square block. Push the bearing C to move towards the square slot, and drive the slider D to slide along the guide rail D, so that the screw C passes through the through hole C and contacts the screw hole opening. Turn the handle to drive the screw C to screw into the screw hole. Locking with the four screws C achieves a stable assembly of the upper and lower parts of the positioning seat. Step 2: Secure the base plate to the top surface of the upper support at the top of the tower crane tower body using high-strength bolts, ensuring that the base plate fits tightly and is firmly fixed to the mounting surface, serving as the supporting foundation for the entire positioning seat; Step 3: Remove the anti-loosening nut A on screw A, hold the rotating plate and pull the vertical rod downwards, causing the connecting plate and slider A to slide downwards along the guide rail A, so that the rotating plate is separated from screw A. Rotate the rotating plate, and the vertical rod, connecting plate and lower open tube will drive the rotating rod A to rotate synchronously, thereby driving the main bevel gear to rotate. The main bevel gear meshes with multiple secondary bevel gears, driving the lead screws connected to each secondary bevel gear to rotate synchronously. The rod sleeve moves along the lead screw axis under the guidance of the slider B and guide rail B, thereby driving the mounting plate to adjust the spacing synchronously in the radial direction. Observe the spacing of the mounting plates until it matches the target slewing bearing diameter, then stop rotating the rotating plate. Step 4: Push the rotating plate upwards so that screw A passes through the through hole A on the rotating plate. Install the lock nut A on screw A and tighten it to fix the rotating plate to limit its rotation. Fix the outer ring of the slewing bearing to multiple mounting plates through the connectors to complete the positioning and installation of the slewing bearing. Step 5: Loosen the anti-loosening nuts B on the upper and lower sides of the adjusting platform on screw B, and adjust the height of the adjusting platform up and down. The positioning platform and slewing bearing will be raised and lowered synchronously through the support column, intermediate connecting seat and support plate until the target installation height is reached. After the height is determined, tighten the anti-loosening nuts B on the upper and lower sides of the adjusting platform to clamp and fix the adjusting platform from the upper and lower sides to complete the height locking.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention allows manual rotation of the main bevel gear at the top center of the positioning platform via an operating component. The meshing transmission between the main bevel gear and multiple auxiliary bevel gears arranged circumferentially around it drives the transmission components connected to each auxiliary bevel gear to move synchronously. This, in turn, drives multiple mounting plates to move synchronously in the radial direction to adjust the spacing. Once the spacing is adapted to the diameter of the target slewing bearing, the main bevel gear is fixed by the operating component, and then the outer ring of the slewing bearing is mounted on the mounting plate via a connector. This solves the problem that the existing positioning seat mounting plate has a fixed position and can only adapt to a single specification of slewing bearing, avoiding the increased cost, inventory pressure, and extended cycle caused by replacing the positioning seat. 2. The present invention directly adjusts the overall installation height of the intermediate connecting seat, positioning platform and slewing bearing by means of the height adjustment component at the bottom of the intermediate connecting seat, thereby solving the problem that the height of the existing positioning seat cannot be flexibly adjusted and assembly interference is easily caused by height deviation; 3. In this invention, when the adjustment platform moves up and down, it will drive the slider C to slide up and down along the guide rail C to maintain the vertical linear movement of the adjustment platform. This effectively limits the lateral offset or swaying of the adjustment platform during and after the height adjustment process, and avoids the support column, intermediate connecting seat and positioning platform from tilting due to the displacement of the adjustment platform, thereby ensuring the coaxiality and accuracy of the slewing bearing installation. 4. This invention disassembles the positioning seat into upper and lower parts using a quick-release assembly. On the one hand, this greatly improves the convenience of transportation, storage, and high-altitude installation. The disassembled parts are smaller and lighter, avoiding the inconvenience and safety risks of transporting the entire structure, and reducing the difficulty of transportation and the intensity of high-altitude operations at the construction site. On the other hand, it enables independent maintenance and flexible combination of the upper and lower parts. When the transmission components, operating components, or height adjustment components of the upper part malfunction or wear out, the corresponding parts can be disassembled individually for repair or replacement without disassembling the entire positioning seat, thus reducing maintenance time and costs. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Another perspective on the specific structure; Figure 3 For the present invention Figure 2 Enlarged view of the local structure of A; Figure 4This is a schematic diagram of the specific structure after removing the anti-loosening nut B in this invention; Figure 5 This is a schematic diagram of the lower open pipe connection structure in this invention; Figure 6 This is a schematic diagram of the specific structure of the present invention after removing screw A; Figure 7 This is a schematic diagram of the specific structure of the upper part of the positioning platform of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of the local structure of B; Figure 9 This is a schematic diagram of the lower part of the positioning stage of the present invention.

[0018] In the diagram: 1. Positioning platform; 2. Main bevel gear; 3. Operating components; 301. Lower open tube; 302. Guide rail A; 303. Slider A; 304. Connecting plate; 305. Vertical rod; 306. Rotating plate; 3061. Through hole A; 307. Screw A; 308. Anti-loosening nut A; 4. Secondary bevel gear; 5. Transmission components; 501. Lead screw; 502. Rotating rod B; 503. Bearing B; 504. Rod sleeve; 505. Guide rail B; 506. Slider B; 6. Mounting plate; 7. Support plate; 8. Intermediate connecting seat; 9. Height adjustment assembly; 901. Support column; 902. Adjustment platform; 9021. Through hole B; 903. Screw B; 904. Base plate; 905. Anti-loosening nut B; 906. Guide rail C; 907. Slider C; 10. Bearing A; 11. Rotor A; 12. Quick-release assembly; 1201. Square slot; 12011. Through hole C; 1202. Square block; 12021. Screw hole; 1203. Guide rail D; 1204. Slider D; 1205. Bearing C; 1206. Rotating rod C; 1207. Screw C; 1208. Handle. Detailed Implementation

[0019] Example 1 like Figure 1 , Figure 2As shown, the present invention provides an adjustable positioning seat for a tower crane slewing bearing, including a positioning platform 1. A main bevel gear 2, which is manually rotated by an operating component 3, is installed at the top center of the positioning platform 1. After being rotated to a suitable position, the main bevel gear 2 is fixed by the operating component 3. Multiple secondary bevel gears 4 are meshed on the main bevel gear 2 and are distributed in a circular pattern around the main bevel gear 2. Each secondary bevel gear 4 is connected to a transmission component 5. Multiple transmission components 5 drive multiple mounting plates 6 to move synchronously, thereby adjusting the position of the mounting plates 6 to adapt to slewing bearings of different diameters. The outer ring of the slewing bearing is mounted on the mounting plate 6 through a connector. The bottom of the positioning table 1 is connected to the intermediate connecting seat 8 on both sides through the support plate 7. The bottom of the intermediate connecting seat 8 is equipped with a height adjustment component 9 to adjust the installation height of the slewing bearing.

[0020] When it is necessary to adapt to slewing bearings of different diameters, the main bevel gear 2 at the top center of the positioning table 1 is manually rotated by the operating component 3. The meshing transmission between the main bevel gear 2 and multiple secondary bevel gears 4 distributed circumferentially around it drives the transmission components 5 connected to each secondary bevel gear 4 to move synchronously. This drives multiple mounting plates 6 to move synchronously in the radial direction to adjust the spacing. After the spacing is adapted to the diameter of the target slewing bearing, the main bevel gear 2 is fixed by the operating component 3, and then the outer ring of the slewing bearing is installed on the mounting plate 6 through the connector. This solves the problem that the existing positioning seat mounting plate has a fixed position and can only adapt to a single specification of slewing bearing, avoiding the increased cost, inventory pressure and extended cycle caused by replacing the positioning seat. When it is necessary to adjust the installation height of the slewing bearing, the overall installation height of the intermediate connecting seat 8, the positioning table 1 and the slewing bearing can be directly adjusted by the height adjustment component 9 at the bottom of the intermediate connecting seat 8. This solves the problem that the height of the existing positioning seat cannot be flexibly adjusted and is prone to assembly interference due to height deviation. Finally, it achieves flexible adaptation to slewing bearings of different diameters and precise adjustment of the installation height, meeting the diverse installation needs of the construction site.

[0021] Example 2 like Figures 1-6As shown in the figure, this embodiment provides the specific structure of the operating component 3, transmission component 5, and height adjustment component 9 in embodiment 1: A bearing A10 is embedded and fixed in the middle of the top of the positioning platform 1, and a rotating rod A11 is fixedly connected to the inner ring of the bearing A10. The main bevel gear 2 is fixed to the top of the rotating rod A11. The operating component 3 includes a lower open tube 301 fixed to the bottom of the rotating rod A11. Multiple guide rails A302 arranged in a circumferential array are installed on the inner side wall of the lower open tube 301, and sliders A303 are slidably connected to the surface of each guide rail A302. A connecting plate 304 is fixedly connected between 03 and 03. A vertical rod 305 is fixedly connected to the bottom end of the connecting plate 304. The vertical rod 305 extends from the lower opening tube 301, and a rotating plate 306 is fixedly connected to its bottom end to facilitate the rotation of the main bevel gear 2. The rotating plate 306 has multiple through holes A3061 arranged in a circumferential array and penetrating the upper and lower surfaces of the rotating plate 306. Multiple screws A307 opposite to the through holes A3061 are fixedly connected to the bottom end of the positioning table 1. Anti-loosening nuts A308 are threaded onto the outer side wall of each screw A307. The transmission assembly 5 includes a component fixed to the secondary bevel gear. Wheel 4 is located away from the lead screw 501 on the surface of the main bevel gear 2. A rotating rod B502 is fixedly connected to the other end of the lead screw 501, and a bearing B503 is sleeved on the outer wall of the rotating rod B502. The rotating rod B502 is fixed in the inner ring of the bearing B503, and the outer ring of the bearing B503 is fixed to the top of the positioning platform 1. A rod sleeve 504 is threaded onto the outer wall of the lead screw 501. A guide rail B505 for sliding the slider B506 is installed on the top surface of the positioning platform 1, parallel to the lead screw 501. The top end of the slider B506 is fixed to the bottom end of the rod sleeve 504. (The last sentence appears to be incomplete and possibly refers to a mounting plate.) 6 is fixed to the top of the sleeve 504. The height adjustment component 9 includes a support column 901 connected to the center of the bottom of the intermediate connecting seat 8. The bottom end of the support column 901 is fixedly connected to an adjustment platform 902. The adjustment platform 902 has multiple through holes B9021 arranged in a circular array and penetrating the upper and lower surfaces of the adjustment platform 902. Each through hole B9021 has a screw B903 inserted inside. The bottom end of the screw B903 is fixedly connected to a base plate 904. The outer side wall of the screw B903 is threaded with anti-loosening nuts B905 on both the upper and lower sides of the adjustment platform 902.

[0022] In use, first, fix the base plate 904 to the top surface of the upper support (or transition section) at the top of the tower crane tower body, as the supporting foundation for the entire positioning seat. When it is necessary to adapt to slewing bearings of different diameters, first remove the anti-loosening nut A308 on the screw A307, and pull the vertical rod 305 downward by holding the rotating plate 306. This will cause the connecting plate 304 and the slider A303 to slide downward along the guide rail A302 on the inner side wall of the lower open tube 301, so that the rotating plate 306 is disengaged from the screw A307. Then, rotate the rotating plate 306, which will drive the rotating rod A11 through the vertical rod 305, the connecting plate 304, and the lower open tube 301. (It is fixed to the top center of the positioning table 1 by bearing A10. The outer ring of bearing A10 is fixed to the positioning table 1. When the rotating rod A11 rotates, it will drive the inner ring of bearing A10 to rotate. The inner ring rotates along with its outer ring, providing rotational support for the rotating rod A11.) It rotates synchronously, thereby driving the main bevel gear 2 fixed to the top of the rotating rod A11 to rotate. The main bevel gear 2 meshes with multiple secondary bevel gears 4 arranged in a circle around it, driving the lead screw 501 connected to each secondary bevel gear 4 (the other end of the lead screw 501, the rotating rod B502, is fixed to the top of the positioning table 1 by bearing B503, and the lead screw 501...) When rotating, it drives the rotating rod B502 to rotate, which in turn drives the inner ring of bearing B503 to rotate. The inner ring rotates along with its outer ring, providing rotational support for the rotating rod B502. The rod sleeve 504, threaded to the outer wall of the lead screw 501, moves axially along the lead screw 501 under the guidance of the slider B506 and the guide rail B505 on the top surface of the positioning table 1 (the rod sleeve 504 moves back and forth on the lead screw 501 via the forward or reverse rotating plate 306; it should be noted that the threads of all lead screws 501 have the same direction to ensure that the spacing of multiple mounting plates 6 is adjusted synchronously). This, in turn, drives the solid... The mounting plate 6, fixed at the top of the sleeve 504, is adjusted radially and synchronously. After the spacing is adapted to the diameter of the target slewing bearing, the rotating plate 306 is pushed upward so that the screw A307 passes through the through hole A3061 on the rotating plate 306. Then, the anti-loosening nut A308 is installed on the screw A307 and tightened to fix the rotating plate 306 (restrict its rotation). The outer ring of the slewing bearing is then installed on the mounting plate 6 through the connector. This solves the problem that the existing positioning seat mounting plate is fixed in position and can only be adapted to a single specification of slewing bearing, avoiding the increased cost, inventory pressure and extended disassembly and commissioning cycle caused by replacing the positioning seat.When the installation height of the slewing bearing needs to be adjusted, the screw B903 (which passes through the through hole B9021 on the adjusting platform 902 and is fixed to the base plate 904) is turned to tighten the anti-loosening nuts B905 located on both sides of the adjusting platform 902. The adjusting platform 902 is then connected to the bottom center of the intermediate connecting seat 8 via the support column 901. The intermediate connecting seat 8 is then securely connected to the positioning platform 1 via the support plates 7 on both sides, thereby synchronously adjusting the installation height of the positioning platform 1 and the slewing bearing. After the height adjustment is completed, the two anti-loosening nuts B905 are tightened to clamp the adjusting platform 902 from both sides, fixing its height. This solves the problem of the existing positioning seat height being inflexible and prone to assembly interference due to height deviation. Ultimately, it achieves flexible adaptation and precise adjustment of the installation height for slewing bearings of different diameters, meeting diverse installation needs on construction sites.

[0023] Furthermore, the top of the base plate 904 is equipped with multiple guide rails C906 arranged in a circular array for sliding sliders C907. The adjustment platform 902 is fixed between the multiple sliders C907. When the adjustment platform 902 moves up and down, it will drive the sliders C907 to slide up and down along the guide rails C906 to maintain the vertical linear movement of the adjustment platform 902. This effectively limits the lateral offset or swaying of the adjustment platform 902 during and after height adjustment, and prevents the support column 901, intermediate connecting seat 8 and positioning platform 1 from being misaligned due to the displacement of the adjustment platform 902, thereby ensuring the coaxiality and accuracy of the slewing bearing installation.

[0024] Example 3 like Figures 1-2 as well as Figures 7-9 As shown, in this embodiment, the support column 901 and the positioning platform 1 in Embodiment 2 are designed to be detachably connected via a quick-release assembly 12. The positioning seat is disassembled into an upper part (including the positioning platform 1, operating component 3, transmission component 5, mounting plate 6, and other core adaptable structures) and a lower part (including the support column 901, height adjustment component 9, base plate 904, and other support and adjustment structures) via the quick-release assembly 12. On the one hand, this greatly improves the convenience of transportation, storage, and high-altitude installation. The disassembled components are smaller and lighter, avoiding the inconvenience and safety risks of transporting the entire structure, and reducing the difficulty of transportation and the intensity of high-altitude operations at the construction site. On the other hand, it enables independent maintenance and flexible combination of the upper and lower parts. When the transmission component 5, operating component 3, or height adjustment component 9 in the upper part malfunctions or wears out, the corresponding part can be disassembled separately for repair or replacement without disassembling the entire positioning seat, reducing maintenance time and costs. The following is the specific structure of the quick-release assembly 12: The quick-install assembly 12 includes a square slot 1201 fixed to the center of the bottom of the positioning platform 1 and having an opening at the bottom, and a square block 1202 fixed to the top of the support column 901 and capable of being inserted into the square slot 1201. The square slot 1201 has through holes C12011 on all four sides, and the square block 1202 has screw holes 12021 on all four sides. When the square block 1202 is inserted into the square slot 1201, the through holes C12011 and the screw holes 12021 are aligned, and the four sides of the square slot 1201 are located below the through holes C12011. Each slider D1204 is fixedly connected to a guide rail D1203 for sliding. The top of each slider D1204 is rotatably connected to a rotating rod C1206 via a bearing C1205. The rotating rod C1206 is fixed in the inner ring of the bearing C1205, and the outer ring of the bearing C1205 is fixed to the slider D1204. A screw C1207 that is threaded into the screw hole 12021 is fixedly connected to one end of the rotating rod C1206 facing the square slot seat 1201. A handle 1208 that facilitates its rotation is fixedly connected to the other end of the screw C1207.

[0025] When assembling the upper and lower parts of the positioning seat, first align the square block 1202 at the top of the support column 901 with the square slot 1201 at the center of the bottom of the positioning table 1 and insert it, so that the through holes C12011 on all four sides of the square slot 1201 are precisely aligned with the screw holes 12021 on all four sides of the square block 1202. Then, push the bearing C1205 to move towards the square slot 1201, thereby driving the slider D1204 to slide along the guide rail D1203 on all four sides of the square slot 1201 towards the square slot 1201. At the same time, drive the rotating rod C1206 and the screw C1207 to move synchronously, so that the screw C1207 at one end of the rotating rod C1206 towards the square slot 1201 passes through the through hole C12011 and contacts the opening of the screw hole 12021. Then, turn the handle 1208 to drive the rotating rod C1206. 06 rotates around the inner ring of bearing C1205 (the inner ring of bearing C1205 rotates along its outer ring, providing rotational support for rotating rod C1206). Rotating rod C1206 drives the rotation of screw C1207, screwing it into screw hole 12021. The four screws C1207 lock together to achieve a stable connection between square block 1202 and square slot seat 1201, thus completing the assembly of the upper and lower parts of the positioning seat. When disassembly is required, rotate each handle 1208 in the opposite direction to remove screw C1207 from screw hole 12021, and then pull bearing C1205 to slide away from square slot seat 1201, so that screw C1207 is completely disengaged from through hole C12011. At this time, square block 1202 can be pulled out from square slot seat 1201, realizing the quick separation of the upper and lower parts of the positioning seat with high disassembly and assembly efficiency.

[0026] The present invention also provides a method for using the adjustable positioning seat of the above-mentioned tower crane slewing bearing: Step 1: Align the square block 1202 at the top of the lower part of the positioning seat (including support column 901, height adjustment component 9, base plate 904, etc.) with the square slot 1201 at the bottom of the upper part of the positioning seat (including positioning platform 1, operating component 3, transmission component 5, mounting plate 6, etc.) and insert it, so that the through holes C12011 on the four sides of the square slot 1201 are precisely aligned with the screw holes 12021 on the four sides of the square block 1202. Push the bearing C1205 to move towards the square slot 1201, and drive the slider D1204 to slide along the guide rail D1203, so that the screw C1207 passes through the through hole C12011 and contacts the opening of the screw hole 12021. Turn the handle 1208 to drive the screw C1207 to screw into the screw hole 12021. The upper and lower parts of the positioning seat are stably assembled by locking the four screws C1207. Step 2: Secure the base plate 904 to the top surface of the upper support at the top of the tower crane tower body using high-strength bolts, ensuring that the base plate 904 fits tightly and is firmly fixed to the mounting surface, serving as the supporting foundation for the entire positioning seat; Step 3: Remove the anti-loosening nut A308 on the screw A307, hold the rotating plate 306 and pull the vertical rod 305 downwards, causing the connecting plate 304 and the slider A303 to slide downwards along the guide rail A302, so that the rotating plate 306 is disengaged from the screw A307. Rotate the rotating plate 306, and through the vertical rod 305, the connecting plate 304 and the lower open tube 301, drive the rotating rod A11 to rotate synchronously, thereby driving the main bevel gear 2 to rotate. The main bevel gear 2 meshes with multiple secondary bevel gears 4, driving the lead screw 501 connected to each secondary bevel gear 4 to rotate synchronously. The rod sleeve 504 moves axially along the lead screw 501 under the guidance of the slider B506 and the guide rail B505, thereby driving the mounting plate 6 to adjust the spacing radially synchronously. Observe the spacing of the mounting plate 6 until it matches the target slewing bearing diameter, then stop rotating the rotating plate 306. Step 4: Push the rotating plate 306 upward so that the screw A307 passes through the through hole A3061 on the rotating plate 306. Install the anti-loosening nut A308 on the screw A307 and tighten it to fix the rotating plate 306 to limit its rotation. Fix the outer ring of the slewing bearing to multiple mounting plates 6 through connectors (such as bolts) to complete the positioning and installation of the slewing bearing. Step 5: Loosen the anti-loosening nuts B905 on the upper and lower sides of the adjusting platform 902 on the screw B903, and adjust the height of the adjusting platform 902 up and down. The positioning platform 1 and the slewing bearing will be raised and lowered synchronously through the support column 901, the intermediate connecting seat 8 and the support plate 7 until the target installation height is reached (during the adjustment process, the adjusting platform 902 drives the slider C907 to slide along the guide rail C906 to maintain linear movement). After the height is determined, tighten the anti-loosening nuts B905 on the upper and lower sides of the adjusting platform 902 to clamp and fix the adjusting platform 902 from the upper and lower sides to complete the height locking.

[0027] The adjustable positioning seat for a tower crane slewing bearing and its method of use, as disclosed in this invention, have the following advantages: The main bevel gear 2 at the top center of the positioning table 1 is manually rotated by the operating component 3. The meshing transmission between the main bevel gear 2 and multiple secondary bevel gears 4 distributed in a circle around it drives the transmission components 5 connected to each secondary bevel gear 4 to move synchronously. This drives multiple mounting plates 6 to move synchronously in the radial direction to adjust the spacing. After the spacing is adapted to the diameter of the target slewing bearing, the main bevel gear 2 is fixed by the operating component 3. Then, the outer ring of the slewing bearing is installed on the mounting plate 6 through the connector. This solves the problem that the existing positioning seat mounting plate is fixed in position and can only be adapted to a single specification of slewing bearing, and avoids the increased cost, inventory pressure and extended cycle caused by replacing the positioning seat. The overall installation height of the intermediate connecting seat 8, the positioning table 1 and the slewing bearing can be directly adjusted by the height adjustment component 9 at the bottom of the intermediate connecting seat 8, thereby solving the problem that the existing positioning seat height cannot be flexibly adjusted and assembly interference is easily caused by height deviation. When the adjusting platform 902 moves up and down, it will drive the slider C907 to slide up and down along the guide rail C906 to maintain the vertical linear movement of the adjusting platform 902. This effectively limits the lateral offset or sway of the adjusting platform 902 during and after height adjustment, and prevents the support column 901, intermediate connecting seat 8 and positioning platform 1 from being misaligned due to the displacement of the adjusting platform 902, thereby ensuring the coaxiality and accuracy of the slewing bearing installation. The positioning seat can be disassembled into upper and lower parts using the quick-release assembly 12. This greatly improves the convenience of transportation, storage, and high-altitude installation. The disassembled parts are smaller and lighter, avoiding the inconvenience and safety risks of transporting the whole structure and reducing the difficulty of transportation and the intensity of high-altitude operations on the construction site. On the other hand, it allows for independent maintenance and flexible combination of the upper and lower parts. When the transmission assembly 5, operating component 3, or height adjustment assembly 9 in the upper part malfunctions or wears out, the corresponding part can be disassembled for repair or replacement without disassembling the entire positioning seat, thus reducing maintenance time and costs.

[0028] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. An adjustable positioning seat for a tower crane slewing bearing, comprising a positioning platform (1), characterized in that: The top center of the positioning platform (1) is equipped with a main bevel gear (2) that can be manually rotated by the operating component (3). After rotating to a suitable position, the main bevel gear (2) is fixed by the operating component (3). Multiple secondary bevel gears (4) are meshed on the main bevel gear (2) and are distributed in a circular pattern around the main bevel gear (2). Each secondary bevel gear (4) is connected to a transmission component (5). Multiple transmission components (5) drive the synchronous movement of multiple mounting plates (6) to adjust the position of the mounting plates (6) so as to adapt to slewing bearings of different diameters. The outer ring of the slewing bearing is mounted on the mounting plate (6) through a connector. The bottom of the positioning platform (1) is connected to the intermediate connecting seat (8) on both sides through the support plate (7). The bottom of the intermediate connecting seat (8) is equipped with a height adjustment component (9) to adjust the installation height of the slewing bearing.

2. The adjustable positioning seat for a tower crane slewing bearing according to claim 1, characterized in that: The top middle part of the positioning platform (1) is embedded with a bearing A (10), and the inner ring of the bearing A (10) is fixedly connected with a rotating rod A (11). The main bevel gear (2) is fixed at the top of the rotating rod A (11).

3. The adjustable positioning seat for a tower crane slewing bearing according to claim 2, characterized in that: The operating component (3) includes a lower open tube (301) fixed to the bottom end of the rotating rod A (11). Multiple guide rails A (302) arranged in a circular array are installed on the inner side wall of the lower open tube (301), and sliders A (303) are slidably connected to the surface of each guide rail A (302). A connecting plate (304) is fixedly connected between the sliders A (303). A vertical rod (305) is fixedly connected to the bottom end of the connecting plate (304). The vertical rod (305) extends out from the lower open tube (301), and a rotating plate (306) is fixedly connected to its bottom end to facilitate the rotation of the main bevel gear (2).

4. The adjustable positioning seat for a tower crane slewing bearing according to claim 3, characterized in that: The rotating plate (306) has multiple through holes A (3061) arranged in a circular array and penetrating the upper and lower surfaces of the rotating plate (306). The bottom end of the positioning platform (1) is fixedly connected to multiple screws A (307) opposite to the through holes A (3061). The outer side wall of each screw A (307) is threaded with a locking nut A (308).

5. The adjustable positioning seat for a tower crane slewing bearing according to claim 1, characterized in that: The transmission assembly (5) includes a lead screw (501) fixed on the surface of the secondary bevel gear (4) away from the main bevel gear (2). A rotating rod B (502) is fixedly connected to the other end of the lead screw (501), and a bearing B (503) is sleeved on the outer wall of the rotating rod B (502). The rotating rod B (502) is fixed in the inner ring of the bearing B (503). The outer ring of the bearing B (503) is fixed to the top of the positioning table (1). A rod sleeve (504) is threadedly connected to the outer wall of the lead screw (501). A guide rail B (505) for sliding the slider B (506) is installed on the top surface of the positioning table (1) parallel to the lead screw (501). The top of the slider B (506) is fixed to the bottom of the rod sleeve (504). The mounting plate (6) is fixed to the top of the rod sleeve (504).

6. The adjustable positioning seat for a tower crane slewing bearing according to claim 1, characterized in that: The height adjustment assembly (9) includes a support column (901) connected to the center of the bottom of the intermediate connecting seat (8), and an adjustment platform (902) is fixedly connected to the bottom end of the support column (901). The adjustment platform (902) has multiple through holes B (9021) arranged in a circular array and penetrating the upper and lower surfaces of the adjustment platform (902). Each through hole B (9021) is filled with a screw B (903), and the bottom end of the screw B (903) is fixedly connected to a base plate (904). The outer side wall of the screw B (903) is threaded with anti-loosening nuts B (905) on both the upper and lower sides of the adjustment platform (902).

7. The adjustable positioning seat for a tower crane slewing bearing according to claim 6, characterized in that: The top of the base plate (904) is equipped with a plurality of guide rails C (906) arranged in a circular array for sliding of the sliders C (907), and the adjustment table (902) is fixed between the plurality of sliders C (907).

8. The adjustable positioning seat for a tower crane slewing bearing according to claim 6, characterized in that: The support column (901) and the positioning platform (1) are detachably connected by a quick-release assembly (12).

9. The adjustable positioning seat for a tower crane slewing bearing according to claim 8, characterized in that: The quick-installation assembly (12) includes a square slot (1201) fixed to the center of the bottom of the positioning platform (1) and open at the bottom, and a square block (1202) fixed to the top of the support column (901) and capable of being inserted into the square slot (1201). The square slot (1201) has through holes C (12011) on all four sides, and the square block (1202) has screw holes (12021) on all four sides. When the square block (1202) is inserted into the square slot (1201), the through holes C (12011) and the screw holes (12021) are aligned, and the four sides of the square slot (1201) are located below the through holes C (12011). All parts are fixedly connected to guide rails D (1203) for sliding slider D (1204). The top of slider D (1204) is rotatably connected to rotating rod C (1206) through bearing C (1205). Rotating rod C (1206) is fixed in the inner ring of bearing C (1205). The outer ring of bearing C (1205) is fixed to slider D (1204). A screw C (1207) is fixedly connected to the end of rotating rod C (1206) facing square slot seat (1201) and threaded to screw hole (12021). A handle (1208) is fixedly connected to the other end of screw C (1207) to facilitate its rotation.

10. A method of using the adjustable positioning seat of the tower crane slewing bearing according to any one of claims 1-9, characterized in that: Includes the following steps: Step 1: Align the square block (1202) at the top of the lower part of the positioning seat with the square slot (1201) at the bottom of the upper part of the positioning seat and insert it, so that the through holes C (12011) on the four sides of the square slot (1201) are precisely aligned with the screw holes (12021) on the four sides of the square block (1202). Push the bearing C (1205) to move towards the square slot (1201), and drive the slider D (1204) to slide along the guide rail D (1203), so that the screw C (1207) passes through the through hole C (12011) and contacts the opening of the screw hole (12021). Turn the handle (1208) to drive the screw C (1207) to screw into the screw hole (12021). Lock the four screws C (1207) to achieve a stable assembly of the upper and lower parts of the positioning seat. Step 2: Secure the base plate (904) to the top surface of the upper support at the top of the tower crane tower body with high-strength bolts, ensuring that the base plate (904) fits tightly and is firmly fixed to the mounting surface, serving as the supporting foundation for the entire positioning seat; Step 3: Remove the anti-loosening nut A (308) on screw A (307), hold the rotating plate (306) and pull the vertical rod (305) downwards, causing the connecting plate (304) and slider A (303) to slide downwards along the guide rail A (302), so that the rotating plate (306) is disengaged from screw A (307). Rotate the rotating plate (306), and through the vertical rod (305), connecting plate (304) and lower open tube (301), drive the rotating rod A (11) to rotate synchronously, thereby driving the main... When the bevel gear (2) rotates, the main bevel gear (2) meshes with multiple secondary bevel gears (4) to drive the lead screw (501) connected to each secondary bevel gear (4) to rotate synchronously. The sleeve (504) moves axially along the lead screw (501) under the guidance of the slider B (506) and the guide rail B (505), thereby driving the mounting plate (6) to adjust the spacing synchronously in the radial direction. Observe the spacing of the mounting plate (6) until it matches the target slewing bearing diameter, then stop rotating the rotating plate (306). Step 4: Push the rotating plate (306) upward so that the screw A (307) passes through the through hole A (3061) on the rotating plate (306), install the anti-loosening nut A (308) on the screw A (307) and tighten it, fix the rotating plate (306) to restrict its rotation, fix the outer ring of the slewing bearing to multiple mounting plates (6) through the connector, and complete the positioning and installation of the slewing bearing; Step 5: Loosen the anti-loosening nuts B (905) on the upper and lower sides of the adjusting platform (902) on the screw B (903), adjust the height of the adjusting platform (902) up and down, and drive the positioning platform (1) and the slewing bearing to rise and fall synchronously through the support column (901), the intermediate connecting seat (8) and the support plate (7) until the target installation height is reached. After the height is determined, tighten the anti-loosening nuts B (905) on the upper and lower sides of the adjusting platform (902) to clamp and fix the adjusting platform (902) from the upper and lower sides to complete the height locking.

Images