Grease filling device for wind turbine generator

Abstract

The invention relates to the related technical field of wind turbine generators, in particular to a grease filling device for a wind turbine generator, which comprises a lifter base with driving equipment, a lifting platform is arranged at the top of the lifter base, and side frames for limiting the lifting platform are fixedly mounted on the periphery of the top of the lifter base. According to the lifting platform, through multi-stage meshing rotation movement of the driving gear, the first-stage rack plate and the second-stage rack plate, the arc-shaped side plates are driven to be unfolded to different degrees in the arc-shaped side walls, and the limiting and supporting effects of the lifting platform at different heights are adjusted; the lifting platform does not shake along with the rising of the height, stable lifting operation of the lifting platform is completed under the condition that sliding wheels and sliding grooves on arc-shaped side plates are attached to different degrees, and the force storage degree between the sliding wheels and second springs is adjusted according to the height of the lifting platform. And the stability performance of the lifting platform between the side frames is improved.

Description

Technical Field

[0001] This invention relates to the technical field of wind turbine generators, and in particular to a grease filling device for wind turbine generators. Background Technology

[0002] During the regular maintenance of wind turbine units, adding lubricating grease to key components such as the main shaft and generator bearings located in the nacelle at an altitude of tens of meters is a crucial and arduous task. It usually consists of a grease tank located at the bottom of the tower or in the nacelle, an electric or pneumatic pump, pipelines and distributors, etc., which aim to achieve automatic lubrication at regular intervals and in measured quantities.

[0003] Currently, to supply oil to high-level lubrication points, grease needs to be transported from the bottom of the tower to the unit's nacelle. This process requires lifting heavy standard grease drums to the nacelle for direct drum replacement. Currently, this often relies on simple hoisting equipment or hoists. These devices lack effective anti-sway and stabilization mechanisms during lifting, making the heavy grease drums prone to swaying and collisions with the tower, seriously threatening equipment and personnel safety. Fall protection during grease drum lifting is a rigid requirement and a weak point in the industry. The lack of integrated, purely mechanically triggered automatic fall protection devices means that if the lifting chain or rope breaks unexpectedly, or if the drive mechanism fails, the grease drum will fall at high speed, potentially causing a catastrophic accident. Furthermore, the lack of active lateral restraint and support on the lifting platform makes it prone to swaying and deflection, especially at the beginning, middle, and near the end of the lifting process. It cannot adaptively adjust the support strength and posture according to different heights, resulting in unstable operation, significantly reducing grease filling efficiency and increasing the labor intensity of operators. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides a grease filling device for wind turbine units.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a grease filling device for wind turbine generators, including a lifting base with a drive device, a lifting platform being provided on the top of the lifting base, and side frames for limiting the lifting platform being fixedly installed around the top of the lifting base, and an anti-sway component for preventing the lifting platform from shaking being provided in each side frame.

[0006] The anti-sway component includes an arc-shaped sidewall fixedly installed inside the side frame. A U-shaped rod that moves up and down is provided inside the arc-shaped sidewall. A movable column is fixedly installed on the U-shaped rod. An arc-shaped side plate that can unfold is connected to the outside of the movable column through a first hinge rod. The movable column is connected to a movable cylinder that reciprocates up and down through a movable screw. A second hinge rod that expands the arc-shaped side plate is connected between the movable cylinder and the arc-shaped side plate. The side frame is equipped with a primary rack plate and a secondary rack plate that unfold the arc-shaped side plate. The bottom of the U-shaped rod is fixed with a connecting block via a connecting rod. The connecting block is connected to a worm gear via a fixed rotating shaft. The bottom end of the movable screw is fixedly equipped with a worm wheel that meshes with the worm gear. The middle end of the fixed rotating shaft is fixedly equipped with a drive gear that movably meshes with the primary rack plate and the secondary rack plate.

[0007] The arc-shaped side plate has a sliding component on the side near the arc-shaped sidewall, and the connecting block has a limiting component inside to limit and support the drive gear.

[0008] As a preferred embodiment of the present invention, the side frame is fixedly installed with a fixing plate, and the fixing plate is provided with a fall protection component, which includes a T-shaped fall protection block. A base block is fixedly installed at the bottom of the lifting platform by bolts. The T-shaped fall protection block is connected to the base block by a first spring. The fixing plate has a plurality of arc-shaped grooves that match the size of the T-shaped fall protection block evenly opened on the side near the lifting platform.

[0009] The fall arrestor also includes an arc-shaped moving rod that moves within the fixed plate. A pushing block is movably disposed at the bottom of the arc-shaped groove on the fixed plate. The pushing block is movably connected to the arc-shaped moving rod via a U-shaped plate. A positioning rod is movably connected to the middle end of the arc-shaped moving rod, and the positioning rod is fixed inside the fixed plate. A fall arrestor hole is provided at the bottom of the arc-shaped groove on the fixed plate.

[0010] As a preferred embodiment of the present invention, a fall arresting baffle is movably disposed inside the fall arresting hole. The fall arresting baffle is connected to the inside of the fixed plate by a second spring. The bottom of the arc-shaped moving rod is movably abutted against the fall arresting baffle. The fixed plate has a T-shaped groove at the bottom of the fall arresting hole. A T-shaped slider is slidably connected in the T-shaped groove, and the top of the T-shaped slider is fixedly installed at the bottom of the fall arresting baffle.

[0011] The elevator base is fixedly installed with hydraulic telescopic cylinders around its perimeter by bolts. The bottom end of each hydraulic telescopic cylinder is fixedly installed with a support plate that moves against the ground. The elevator base is movably connected with wheels. A ladder frame is provided at one end of the elevator base near the safety door on the elevator platform.

[0012] As a preferred embodiment of the present invention, the sliding assembly includes a sliding base, a sliding wheel, and a third spring. The sliding base is bolted to the upper and lower ends of the arc-shaped side plate near the arc-shaped sidewall. The third spring is bolted to the inner bottom of the sliding base. A sliding plate is bolted to the top ends of the third spring and moves within the sliding base. The sliding wheel is bolted to the side of the sliding plate away from the third spring. A sliding groove matching the size of the sliding wheel is formed on the inner side of the arc-shaped sidewall, and the sliding wheel moves within the sliding groove.

[0013] In a preferred embodiment of the present invention, the driving gear is disposed between the connecting blocks. The limiting component disposed within the connecting blocks includes an arc-shaped limiting rod and a fourth spring. The fourth spring is fixedly installed inside the connecting blocks on the side away from the driving gear by bolts. The arc-shaped limiting rod is fixedly installed between the top ends of the fourth spring by bolts. The connecting blocks have limiting holes that match the size of the arc-shaped limiting rod, and the arc-shaped limiting rod moves within the limiting holes. Limiting grooves that match the size of the arc-shaped limiting rod are evenly provided on both sides of the driving gear, and the top end of the arc-shaped limiting rod moves within the limiting grooves.

[0014] The side frame has a movable slot on the side near the lifting platform, and the movable column has a support rod fixedly installed on the side away from the U-shaped rod. The support rod moves in the movable slot, and a support plate is fixedly installed at the top of the support rod. The support plate is fixedly installed around the lifting platform.

[0015] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. In this invention, the multi-stage meshing and rotational motion of the drive gear with the first-stage and second-stage rack plates drives the arc-shaped side plates to unfold to different degrees within the arc-shaped sidewall. This adjusts the limiting support effect of the lifting platform at different heights, ensuring that the lifting platform does not sway as the height increases. The sliding wheels and sliding grooves on the arc-shaped side plates achieve stable lifting and lowering of the lifting platform when they are in contact with each other to different degrees. The force storage between the sliding wheels and the third spring is adjusted according to the height of the lifting platform, improving the stability of the lifting platform between the side frames. This facilitates the addition and lubrication of grease during the maintenance of the wind turbine, ensuring long-term reliable operation.

[0016] 2. In this invention, the T-shaped anti-fall block cooperates with the arc-shaped groove on the fixed plate to ensure the stability of the lifting platform during the lifting process and to protect against the rapid descent of the lifting platform. The T-shaped anti-fall block of the lifting platform enters the arc-shaped groove to push out the anti-fall baffle, so that the anti-fall baffle will limit the movement of the lifting platform throughout the lifting process, which greatly improves the stability of the lifting platform and ensures the safety performance of the tower. It is suitable for high-risk working environments such as outside the tower, and also facilitates the lubrication of key parts during maintenance, thus improving the service life of the equipment.

[0017] 3. In this invention, the sliding wheel is driven by the arc-shaped side plate to slide in the sliding groove of the arc-shaped side wall. The arc-shaped side plates are symmetrically arranged in each arc-shaped side wall to move, so that the movable column runs stably in the arc-shaped side wall. The movable column, U-shaped rod and support rod form a stable triangular structure in the side frame, so that the movable column will not shake during the lifting and lowering process in the side frame, and the lifting and lowering operation is more stable.

[0018] 4. In this invention, the arc-shaped side plate on the outer periphery of the movable column is unfolded by the first-stage rack plate in conjunction with the drive gear. The sliding wheel on the arc-shaped side plate moves into the sliding groove, ensuring the stability of the lifting platform during the middle lifting process. After the second-stage rack plate meshes with the drive gear again, the sliding wheel of the arc-shaped side plate is pressed tightly against the sliding groove. The reaction force generated by the compression of the third spring ensures that the triangular structure formed by the movable column, the U-shaped rod and the support rod is more firmly attached and moves within the arc-shaped side wall, ensuring the stability of the lifting platform when it reaches the top.

[0019] 5. In this invention, the arc-shaped side plate adaptively adjusts its unfolding degree at different heights to actively suppress swaying. Combined with the triangular structure formed by the U-shaped rod and support rod, the rigidity of the lifting platform is fundamentally guaranteed. Through the cooperation of the T-shaped anti-fall block and the arc-shaped groove, the anti-fall baffle can be quickly triggered to achieve mechanical hard braking in the event of an accidental fall. Through the multi-stage transmission of the first and second-stage rack plates, the platform obtains stable support in the middle stroke. The pressure of the third spring makes the sliding wheel and the slide groove press tightly together, achieving a more stable effect as it goes higher. Together, these measures ensure high safety and high stability of the grease tank during the lifting process. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the lifting platform base of the present invention; Figure 3 This is a schematic diagram of the connection between the side frame and the fixing plate of the present invention; Figure 4 This is a schematic diagram of the internal structure of the side frame of the present invention; Figure 5 This is a schematic diagram of the arc-shaped sidewall structure of the present invention; Figure 6 This is a schematic diagram of the U-shaped rod of the present invention; Figure 7 This is a schematic diagram of the arc-shaped side plate of the present invention; Figure 8 This is a schematic diagram of the worm gear structure of the present invention; Figure 9 This is a schematic diagram of the structure of the movable column of the present invention; Figure 10 This is a schematic diagram of the structure of the fixed rotating shaft of the present invention; Figure 11 This is a schematic diagram of the internal structure of the connecting block of the present invention; Figure 12 This is a schematic diagram of the internal structure of the sliding base of the present invention; Figure 13 This is a schematic diagram of the structure of the fixing plate of the present invention; Figure 14 This is a schematic diagram of the internal structure of the base block of the present invention; Figure 15 For the present invention Figure 14 Enlarged view of the structure at point A in the middle.

[0021] The components include: 10. Lifting platform base; 11. Side frame; 12. Lifting platform; 13. Hydraulic telescopic cylinder; 14. Support plate; 15. Climbing ladder frame; 16. Movable groove; 17. Support rod; 18. Support plate; 19. Traveling wheel; 20. Arc-shaped side wall; 21. First-stage rack plate; 22. Second-stage rack plate; 23. Sliding groove; 24. Sliding base; 25. Third spring; 26. Sliding plate; 27. Sliding wheel; 30. U-shaped rod; 31. Movable column; 32. First hinge rod; 33. Arc-shaped side plate; 34. Movable screw; 35. Movable cylinder; 36. 37. Second hinge rod; 40. Worm gear; 41. Connecting block; 42. Connecting rod; 43. Fixed rotating shaft; 44. Worm gear; 45. Arc-shaped limiting rod; 46. Fourth spring; 47. Limiting hole; 48. Limiting groove; 50. Fixing plate; 51. T-shaped anti-fall block; 52. Base block; 53. First spring; 54. Arc-shaped groove; 55. Arc-shaped moving rod; 56. Pushing block; 57. Positioning rod; 58. Recurve plate; 60. Anti-fall hole; 61. Anti-fall baffle; 62. T-shaped slider; 63. Second spring; 64. T-shaped slide groove. Detailed Implementation

[0022] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0023] Example: Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 11 , Figure 12 , Figure 14 and Figure 15 As shown, a grease filling device for wind turbines includes a lifting base 10 with a drive device. A lifting platform 12 is provided on the top of the lifting base 10. The lifting platform 12 can be used to lift and lower the grease tank. Side frames 11 are fixedly installed around the top of the lifting base 10 to limit the movement of the lifting platform 12. Each side frame 11 is provided with an anti-sway component to prevent the lifting platform 12 from shaking. The anti-sway component ensures that the lifting platform 12 will not shake when it rises to the top, and provides very stable fixed support for the lifting platform 12.

[0024] The anti-sway assembly includes an arc-shaped sidewall 20 fixedly installed within the side frame 11. A U-shaped rod 30 is movably arranged within the arc-shaped sidewall 20. A movable column 31 is fixedly installed on the U-shaped rod 30. An arc-shaped side plate 33 that movably abuts against the arc-shaped sidewall 20 is movably connected to the outside of the movable column 31 via a first hinge rod 32. A movable screw 34 is movably connected to the bottom end of the movable column 31. A movable cylinder 35 is threadedly connected to the movable screw 34. A second hinge rod 36 is movably connected between the movable cylinder 35 and the arc-shaped side plate 33. When the movable cylinder 35 rises around the movable screw 34, the second hinge rod 36, in conjunction with the first hinge rod 32, unfolds the arc-shaped side plate 33 around the movable column 31. Similarly, when the movable cylinder 35 descends around the movable screw 34, the second hinge rod 36, in conjunction with the first hinge rod 32, causes the arc-shaped side plate 33 to retract within the arc-shaped sidewall 20.

[0025] A primary rack plate 21 is fixedly installed at the middle of the side frame 11, and a secondary rack plate 22 is fixedly installed at the top of the side frame 11. When the primary rack plate 21 meshes with the drive gear 44, the worm gear 43 rotates through the fixed rotating shaft 42. The rotation of the worm gear 43 drives the worm wheel 37 under the movable screw 34 to rotate, causing the movable cylinder 35 on the movable screw 34 to rise, thus completing the first stage of unfolding of the arc-shaped side plate 33. When the lifting platform 12 moves to the middle, the sliding wheel 27 on the arc-shaped side plate 33 presses against the sliding groove 23 of the arc-shaped side wall 20, keeping the lifting platform 12 stable during the rise. Similarly, when the movement meshes with the secondary rack plate 22, the sliding wheel 27 and the sliding groove 23 are further pressed against each other, thus... The lifting platform 12 rises more stably. The bottom of the U-shaped rod 30 is fixed with a connecting block 40 via a connecting rod 41. The connecting block 40 is movably connected to a fixed rotating shaft 42. Worms 43 are installed at both ends of the fixed rotating shaft 42. A worm wheel 37 that meshes with the worm 43 is fixedly installed at the bottom of the movable screw 34. The meshing transmission of the worm 43 and the worm wheel 37 enables the movable cylinder 35 to complete a stable lifting motion on the movable screw 34. The middle end of the fixed rotating shaft 42 is fixedly installed with a drive gear 44 that meshes with the first-stage rack plate 21 and the second-stage rack plate 22. By meshing with the multi-stage rack plates, the degree of expansion of the arc-shaped side plate 33 within the arc-shaped side wall 20 is adjusted, so that the degree of limiting support for the lifting platform 12 varies when the lifting platform 12 is at different heights.

[0026] The arc-shaped side plate 33 has a sliding component on the side near the arc-shaped side wall 20. The sliding wheel 27 in the sliding component fits into the sliding groove 23, and the sliding wheel 27 fits even tighter at the top of the sliding groove 23. As the lifting platform 12 moves upward, the sliding wheel 27, together with the third spring 25, completes the storage and compression. The tightness between the sliding wheel 27 and the sliding groove 23 increases friction and increases the power of the drive device in the lifting platform base 10, thereby achieving the effect of stabilizing the movement of the lifting platform 12. The connecting block 40 is equipped with a limiting component that limits and supports the drive gear 44. The limiting component helps to increase the stable movement of the drive gear 44, so that the drive gear 44 will not deviate when it is not meshing with the rack plate.

[0027] See Figure 2 , Figure 3 , Figure 12 , Figure 13 , Figure 14 and Figure 15A fixed plate 50 is fixedly installed on the side frame 11. A fall protection component is installed inside the fixed plate 50. The fall protection component includes a T-shaped fall protection block 51. A base block 52 is fixedly installed on the bottom of the lifting platform 12 by bolts. The T-shaped fall protection block 51 is connected inside the base block 52 by a first spring 53. The fixed plate 50 has several arc-shaped grooves 54 that match the size of the T-shaped fall protection block 51 evenly opened on the side near the lifting platform 12. During the lifting process of the lifting platform 12, the T-shaped fall protection block 51 moves in and out of the arc-shaped grooves 54 under the action of the base block 52 and the first spring 53.

[0028] The fall arrestor assembly also includes an arc-shaped moving rod 55 movable within the fixed plate 50. A pushing block 56 is movably disposed at the bottom of the arc-shaped groove 54 within the fixed plate 50. The pushing block 56 is movably connected to the arc-shaped moving rod 55 via a U-shaped plate 58. A positioning rod 57 is movably connected to the middle end of the arc-shaped moving rod 55 and is fixed inside the fixed plate 50. A fall arrestor hole 60 is provided at the bottom of the arc-shaped groove 54 within the fixed plate 50. The arc-shaped moving rod 55, in conjunction with the pushing block 56, moves the fall arrestor baffle 61. When the T-shaped fall arrestor block 51 enters the arc-shaped groove, it presses the pushing block 56 in, causing the pushing block 56 to be positioned via the U-shaped plate 58. The arc-shaped moving rod 55 on rod 57 swings, pushing the anti-fall baffle 61 on the second spring 63 out of the anti-fall hole 60. The extended anti-fall baffle 61 blocks the T-shaped anti-fall block 51, effectively preventing the lifting platform 12 from falling rapidly. When the T-shaped anti-fall block 51 disengages from the arc-shaped groove 54, the second spring 63 resets and drives the anti-fall baffle 61 into the anti-fall hole 60. At the same time, the anti-fall baffle 61 will also react and push the push block 56 out again through the arc-shaped moving rod 55, completing the reset of the push block 56. In this way, the anti-fall baffle 61 will not block the T-shaped anti-fall block 51 during the descent of the lifting platform 12.

[0029] See Figure 1 , Figure 2 , Figure 3 , Figure 13 , Figure 14 and Figure 15 An anti-fall baffle 61 is movably installed inside the anti-fall hole 60. The anti-fall baffle 61 is connected to the inside of the fixed plate 50 by a second spring 63. The bottom of the arc-shaped moving rod 55 moves against the anti-fall baffle 61. The fixed plate 50 has a T-shaped groove 64 at the bottom of the anti-fall hole 60. A T-shaped slider 62 is slidably connected in the T-shaped groove 64, and the top of the T-shaped slider 62 is fixedly installed at the bottom of the anti-fall baffle 61. The anti-fall baffle 61 moves through the T-shaped groove 64 and the T-shaped slider 62.

[0030] Hydraulic telescopic cylinders 13 are fixedly installed around the base 10 of the lifting platform by bolts. A support plate 14 that moves against the ground is fixedly installed at the bottom of the hydraulic telescopic cylinder 13. The hydraulic telescopic rod, together with the support plate 14 and the ground support, completes the support of the lifting platform base 10. The lifting platform base 10 is movably connected to the traveling wheels 19, which push the lifting platform base 10 to move. A ladder frame 15 is set at one end of the lifting platform base 10 near the safety door on the lifting platform 12 to facilitate the up and down operation of the grease drum on the lifting platform 12.

[0031] See Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 11 The sliding assembly includes a sliding base 24, a sliding wheel 27, and a third spring 25. The sliding base 24 is bolted to the upper and lower ends of the arc-shaped side plate 33 near the arc-shaped sidewall 20. The third spring 25 is bolted to the inner bottom of the sliding base 24. A sliding plate 26 is bolted to the top of the third spring 25, and the sliding plate 26 is movable inside the sliding base 24. The sliding wheel 27 is bolted to the side of the sliding plate 26 away from the third spring 25. The inner side of the arc-shaped sidewall 20 is open... A sliding groove 23 is provided that matches the size of the sliding wheel 27, and the sliding wheel 27 moves within the sliding groove 23. When the arc-shaped side plate 33 passes through the first-stage rack plate 21, the sliding wheel 27 on the sliding base 24 presses tightly against the sliding groove 23, so that the lifting platform 12 will not shake during the lifting process. Similarly, when the arc-shaped side plate 33 passes through the second-stage rack plate 22, the sliding wheel 27 presses tightly against the sliding groove 23, so that after rising to a certain height, the lifting platform 12 runs more stably and will not shake.

[0032] See Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10The driving gear 44 is disposed between the connecting blocks 40. The limiting components disposed within the connecting blocks 40 include an arc-shaped limiting rod 45 and a fourth spring 46. The fourth spring 46 is bolted to the side of the connecting blocks 40 away from the driving gear 44. The arc-shaped limiting rod 45 is bolted to the top of the fourth spring 46. The connecting blocks 40 have limiting holes 47 that match the size of the arc-shaped limiting rod 45, and the arc-shaped limiting rod 45 moves within the limiting holes 47. The driving gear 44 has evenly spaced holes on both sides that match the size of the arc-shaped limiting rod 45. The matching limiting groove 48, and the top of the arc-shaped limiting rod 45 moves in the limiting groove 48. When the drive gear 44 meshes and rotates with the first-stage rack plate 21 and the second-stage rack plate 22, the arc-shaped limiting rod 45 compresses the fourth spring 46 during the rotation of the drive gear 44. After the drive gear 44 rotates, the arc-shaped limiting rod 45 will pop out through the force of the stored fourth spring 46, so that the arc-shaped limiting rod 45 passes through the limiting hole 47 and abuts against the limiting groove 48 on the side of the drive gear 44, using the movement of the arc-shaped limiting rod 45 and the limiting groove 48 to abut against each other.

[0033] The side frame 11 has a movable slot 16 on the side near the lifting platform 12. The movable column 31 has a support rod 17 fixedly installed on the side away from the U-shaped rod 30. The support rod 17 moves in the movable slot 16. The top of the support rod 17 is fixedly installed with a support plate 18. The support plate 18 is fixedly installed around the lifting platform 12. The lifting platform 12 moves the movable column 31 and the U-shaped rod 30 up and down within the arc-shaped side wall 20 through the support rod 17 and the support plate 18.

[0034] Working principle: The device is moved to the bottom of the tower by the traveling wheels 19. The support plate 14 under the hydraulic telescopic cylinder 13 is used to stably fix the elevator base 10 and the lifting platform 12. After the support plate 14 under the hydraulic telescopic cylinder 13 abuts against the ground support, the grease drum is transported to the lifting platform 12 by the climbing frame 15.

[0035] The scissor lift structure is pushed and unfolded by the drive device inside the lifting platform base 10, thereby causing the lifting platform 12 to rise. During the lifting process, the base blocks 52 around the lifting platform 12 drive the T-shaped anti-fall blocks 51 to move and abut against the arc-shaped grooves 54 on the fixed plate 50. The T-shaped anti-fall blocks 51, in conjunction with the second spring 63, move in and out of the arc-shaped grooves 54. When the T-shaped anti-fall blocks 51 enter the arc-shaped grooves, they will press the push block 56 in. During the pressing process, the push block 56 drives the arc-shaped moving rod 55 on the positioning rod 57 to swing through the return plate 58. During the swinging process, the bottom of the arc-shaped pushing rod pushes the second spring. The anti-fall baffle 61 on the spring 63 pushes out of the anti-fall hole 60, and the extended anti-fall baffle 61 blocks the T-shaped anti-fall block 51, effectively preventing the lifting platform 12 from falling rapidly. When the T-shaped anti-fall block 51 disengages from the arc-shaped groove 54, the second spring 63 resets and drives the anti-fall baffle 61 into the anti-fall hole 60. At the same time, the anti-fall baffle 61 will also react and push the push block 56 out again through the arc-shaped moving rod 55, completing the reset of the push block 56. In this reciprocating motion, the T-shaped anti-fall block 51 connected to the lifting platform 12 moves in multiple arc-shaped grooves 54 on the fixed plate 50. The arc-shaped grooves 54 passed through in sequence effectively prevent the lifting platform 12 from falling rapidly.

[0036] Simultaneously, during its upward movement, the lifting platform 12 drives the movable column 31 and U-shaped rod 30 within the arc-shaped sidewall 20 to rise synchronously via the support plate 18 and support rod 17 through the movable slot 16. The bottom of the U-shaped rod 30 also rises within the arc-shaped sidewall 20 via the connecting block 40 of the connecting rod 41 and the drive gear 44. When the drive gear 44 rises to the middle of the side frame 11, it engages with the first-stage rack plate 21, causing the fixed rotating shaft 42 connected to the connecting block 40 to rotate synchronously with the drive gear 44. The worm gears 43 at both ends of the fixed rotating shaft 42 also move synchronously. 3. The meshing drives the worm gear 37 to rotate. The movable screw 34 on the worm gear 37 will rotate at the bottom of the movable column 31. During the rotation, the movable cylinder 35 on the movable screw 34 will rise through the limitation of the second hinge rod 36. After rising, the movable cylinder 35 will unfold the arc-shaped side plate 33 through the second hinge rod 36 and the first hinge rod 32. The sliding wheel 27 connected to the sliding seat on the arc-shaped side plate 33 will enter the sliding groove 23 of the arc-shaped side wall 20, so that the lifting platform 12 will have limit support during the rise and will not easily shake when it moves to the middle.

[0037] As the drive gear 44 rotates on one side of the connecting block 40, the arc-shaped limiting rod 45 on the connecting block 40 compresses the fourth spring 46. After the drive gear 44 rotates and meshes with the rack plate once, the arc-shaped limiting rod 45 is ejected from the limiting hole 47 by the stored force of the fourth spring 46 and enters the limiting groove 48 on the side of the drive gear 44, realizing the limiting support after each rotation. When the drive gear 44 disengages from the first-stage rack plate 21, the arc-shaped limiting rod 45 and the limiting groove 48 cooperate to fix and limit the drive gear 44, so that the arc-shaped side plate 33 always remains in the unfolded state.

[0038] As the lifting platform 12 continues to rise, the drive gear 44 will mesh with the secondary rack plate 22. Similarly, as the movable cylinder 35 continues to rise, it will drive the arc-shaped side plate 33 to further unfold, so that the sliding wheel 27 connected to the arc-shaped side plate 33 will further engage with the sliding groove 23 of the arc-shaped side wall 20, thereby strengthening the stability of the lifting platform 12 during the rising process.

[0039] Similarly, during the descent of the lifting platform 12, the T-shaped anti-fall block 51 enters the arc-shaped groove 54 and works with the anti-fall baffle 61 to protect the lifting platform 12 from falling. Meanwhile, the drive gear 44 rotates in opposite directions on the first-stage rack plate 21 and the second-stage rack plate 22, which synchronously drives the worm gear 43 connected to the fixed rotating shaft 42 on the connecting block 40 to also move in opposite directions. The worm gear 43 drives the worm wheel 37 to rotate in opposite directions. At this time, the movable cylinder 35 moves downward in the movable screw 34, and the arc-shaped side plate 33 moves in a retracting motion on the outer periphery of the movable column 31. When the lifting platform 12 moves to the bottom, the state of the sliding wheel 27 and the sliding groove 23 will also be reset, ready for the next upward movement of the lifting platform 12.

[0040] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A grease filling device for wind turbine generators, comprising a lifting base (10) with a drive mechanism, wherein a lifting platform (12) is provided on the top of the lifting base (10), characterized in that, The top four sides of the elevator base (10) are fixedly installed with side frames (11) to limit the movement of the lifting platform (12), and each side frame (11) is provided with an anti-sway component to prevent the lifting platform (12) from shaking. The anti-sway assembly includes an arc-shaped sidewall (20) fixedly installed in the side frame (11), a U-shaped rod (30) that moves up and down is provided in the arc-shaped sidewall (20), a movable column (31) is fixedly installed on the U-shaped rod (30), an arc-shaped side plate (33) that moves outward is connected to the outside of the movable column (31) through a first hinge rod (32), a movable cylinder (35) that moves up and down is connected to the movable column (31) through a movable screw (34), and a second hinge rod (36) that opens the arc-shaped side plate (33) between the movable cylinder (35) and the arc-shaped side plate (33). The side frame (11) is equipped with a first-stage rack plate (21) and a second-stage rack plate (22) for unfolding the arc-shaped side plate (33). The bottom of the U-shaped rod (30) is fixed with a connecting block (40) via a connecting rod (41). The connecting block (40) is connected to a worm gear (43) via a fixed rotating shaft (42). The bottom end of the movable screw (34) is fixedly equipped with a worm wheel (37) that meshes with the worm gear (43). The middle end of the fixed rotating shaft (42) is fixedly equipped with a drive gear (44) that meshes with the first-stage rack plate (21) and the second-stage rack plate (22). The arc-shaped side plate (33) has a sliding component on the side near the arc-shaped side wall (20), and the connecting block (40) has a limiting component inside to limit and support the drive gear (44).

2. The grease filling device for wind turbine units according to claim 1, characterized in that, The side frame (11) is fixedly installed with a fixing plate (50). The fixing plate (50) is provided with a fall protection component, which includes a T-shaped fall protection block (51). A base block (52) is fixedly installed at the bottom of the lifting platform (12) by bolts. The T-shaped fall protection block (51) is connected inside the base block (52) by a first spring (53). The fixing plate (50) has several arc-shaped grooves (54) that match the size of the T-shaped fall protection block (51) evenly opened on the side near the lifting platform (12).

3. The grease filling device for wind turbine units according to claim 2, characterized in that, The fall protection assembly also includes an arc-shaped moving rod (55) that moves within the fixed plate (50). The fixed plate (50) has a push block (56) that is movably disposed at the bottom of the arc-shaped groove (54). The push block (56) is movably connected to the arc-shaped moving rod (55) via a U-shaped plate (58). A positioning rod (57) is movably connected to the middle end of the arc-shaped moving rod (55). The positioning rod (57) is fixed inside the fixed plate (50). The fixed plate (50) has a fall protection hole (60) at the bottom of the arc-shaped groove (54).

4. A grease filling device for wind turbine units according to claim 3, characterized in that, An anti-fall baffle (61) is movably installed inside the anti-fall hole (60). The anti-fall baffle (61) is connected to the inside of the fixed plate (50) by a second spring (63). The bottom of the arc-shaped moving rod (55) is movably abutted against the anti-fall baffle (61). The fixed plate (50) has a T-shaped groove (64) at the bottom of the anti-fall hole (60). A T-shaped slider (62) is slidably connected in the T-shaped groove (64), and the top of the T-shaped slider (62) is fixedly installed at the bottom of the anti-fall baffle (61).

5. A grease filling device for wind turbine units according to claim 1, characterized in that, The elevator base (10) is fixedly installed with hydraulic telescopic cylinders (13) around its perimeter by bolts. The bottom end of the hydraulic telescopic cylinder (13) is fixedly installed with a support plate (14) that moves against the ground. The elevator base (10) is movably connected with walking wheels (19). The elevator base (10) is provided with a ladder frame (15) at one end near the safety door on the elevator platform (12).

6. A grease filling device for wind turbine units according to claim 1, characterized in that, The sliding assembly includes a sliding base (24), a sliding wheel (27), and a third spring (25). The upper and lower ends of the arc-shaped side plate (33) near the arc-shaped side wall (20) are fixedly installed with the sliding base (24) by bolts. The inner bottom of the sliding base (24) is fixedly installed with the third spring (25) by bolts. The top ends of the third spring (25) are fixedly installed with a sliding plate (26) by bolts. The sliding plate (26) moves inside the sliding base (24). The sliding wheel (27) is fixedly installed with bolts on the side of the sliding plate (26) away from the third spring (25). The inner side of the arc-shaped side wall (20) is provided with a sliding groove (23) that matches the size of the sliding wheel (27). The sliding wheel (27) moves within the sliding groove (23).

7. A grease filling device for wind turbine units according to claim 1, characterized in that, The drive gear (44) is disposed between the connecting blocks (40). The limiting component disposed in the connecting block (40) includes an arc-shaped limiting rod (45) and a fourth spring (46). The fourth spring (46) is fixedly installed in the connecting block (40) on the side away from the drive gear (44) by bolts. The arc-shaped limiting rod (45) is fixedly installed between the top ends of the fourth spring (46) by bolts. The connecting block (40) has a limiting hole (47) that matches the size of the arc-shaped limiting rod (45), and the arc-shaped limiting rod (45) moves in the limiting hole (47). The drive gear (44) has a limiting groove (48) that matches the size of the arc-shaped limiting rod (45) evenly disposed on both sides, and the top end of the arc-shaped limiting rod (45) moves in the limiting groove (48).

8. A grease filling device for wind turbine units according to claim 1, characterized in that, The side frame (11) has a movable slot (16) on the side near the lifting platform (12). The movable column (31) has a support rod (17) fixedly installed on the side away from the U-shaped rod (30). The support rod (17) moves in the movable slot (16). A support plate (18) is fixedly installed at the top of the support rod (17). The support plate (18) is fixedly installed around the lifting platform (12).

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