Special tool for removing gearbox intermediate shaft generator side bearing
By designing a special tool for removing the generator side bearing of the medium-speed shaft in the gearbox, and utilizing a motor-driven bevel gear transmission and an electric telescopic rod, stable and precise removal of the medium-speed bearing is achieved. This solves the problem of damage to the bearing or bearing housing in traditional disassembly tools, and is particularly suitable for the maintenance of wind turbine generator sets. It also solves the problem of damage to the transmission during medium-speed disassembly, and addresses the low efficiency and damage issues of traditional disassembly methods, achieving an efficient and safe disassembly process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- UNITED CREATION GREEN POWER CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-06-02
AI Technical Summary
In wind turbine generator sets, the disassembly of the generator side bearing on the medium-speed shaft of the gearbox is difficult. Traditional methods are prone to damaging the bearing or journal and are inefficient, affecting the lifespan of the equipment.
A special tool for removing the generator side bearing of the medium-speed shaft in a gearbox was designed. It uses a motor-driven bevel gear transmission to rotate the threaded sleeve, realizing the linear motion of the pull screw. Combined with an electric telescopic rod to drive the pull head to unfold and clamp the bearing, the stability and accuracy of the vertical pull process are ensured by adjusting the screw to fix the tool.
It improves disassembly efficiency, reduces manual labor intensity, protects equipment, extends service life, and is suitable for maintenance operations in complex environments.
Smart Images
Figure CN224310557U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bearing disassembly and assembly technology, and in particular to a special tool for removing the generator side bearing of the gearbox medium speed shaft. Background Technology
[0002] In the routine maintenance of wind turbine generator sets, the replacement of bearings inside the gearbox, as a critical transmission component, is a technically demanding and difficult repair operation. This is especially true for bearings on the generator side of the medium-speed shaft, where the limited installation space and compact structure mean that traditional disassembly methods often involve manual pulling, hammering, or heating. These methods are not only labor-intensive and inefficient but also prone to damaging the bearings or journals, potentially affecting the equipment's lifespan. Therefore, we have developed a specialized tool for removing the generator side bearings of the gearbox's medium-speed shaft. Utility Model Content
[0003] The main purpose of this utility model is to provide a special tool for removing the generator side bearing of the intermediate speed shaft in a gearbox, which can effectively solve the problems in the background art.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A special tool for removing the generator side bearing of the gearbox medium speed shaft includes a mounting frame, a drive mechanism in the middle of the mounting frame, a pulling mechanism threadedly connected to the middle of the drive mechanism, and a controller fixedly mounted on the upper end of the mounting frame.
[0006] The drawing mechanism includes a drawing screw, which is threadedly connected to a drive mechanism. A drawing body is fixedly connected to the lower end of the drawing screw, and a top plate is fixedly connected to the upper end of the drawing screw. Guide rods are fixedly connected to the left and right sides of the lower end of the top plate.
[0007] Preferably, sleeve rods are fixedly installed on both the left and right sides of the upper end of the mounting bracket, and the two guide rods are slidably connected to the two sleeve rods respectively.
[0008] By adopting the above technical solution, the guide structure ensures that the drawing screw remains vertical during movement, preventing uneven force distribution or tool jamming caused by deviation, thus improving the stability and reliability of the drawing operation.
[0009] Preferably, the drive mechanism includes a forward and reverse motor and a threaded sleeve. The forward and reverse motor is fixedly mounted on the mounting bracket, and a drive bevel gear is fixedly connected to the output end of the forward and reverse motor. The threaded sleeve is movably connected to the mounting bracket through a bearing, and a transmission bevel gear that meshes with the drive bevel gear is fixedly sleeved on the lower part of the threaded sleeve.
[0010] By adopting the above technical solution, the structure drives the threaded sleeve to rotate through the bevel gear transmission driven by the motor, thereby achieving precise driving of the drawing screw. The structure is compact, has high transmission efficiency, and is easy to automate.
[0011] Preferably, the inner surface of the threaded sleeve is provided with a spiral pattern that is threaded to the drawing screw, and the drawing screw is inserted into the threaded sleeve and threaded to the threaded sleeve.
[0012] By adopting the above technical solution, the rotational motion of the threaded sleeve is converted into the linear motion of the pulling screw through the threaded transmission structure, thereby achieving stable pulling of the bearing with high transmission accuracy and making it suitable for disassembly operations of bearings of different specifications.
[0013] Preferably, the drawing body includes a drawing plate platform, which is fixedly connected to the lower end of the drawing screw. The outer surface of the drawing plate platform is provided with four sliding grooves in an annular shape. A drawing head is slidably connected in each of the four sliding grooves. One end of the drawing head is fixedly connected to an electric telescopic rod, which is embedded in the drawing plate platform.
[0014] By adopting the above technical solution, this structure enables the puller head to automatically unfold and clamp according to the inner ring size of the bearing, realizing non-destructive disassembly of the bearing and improving the applicability and automation level of the tool.
[0015] Preferably, the inner surface of the slide groove has two symmetrically formed guide grooves, and the outer surface of the pull head is symmetrically connected with two guide blocks that are slidably connected to the guide grooves.
[0016] By adopting the above technical solution, the guide structure makes the pull-out head move more smoothly and steadily in the groove, avoiding deviation or jamming, ensuring that the pull-out head is subjected to uniform force when clamping the bearing, and improving the stability and safety of the disassembly operation.
[0017] Preferably, two adjusting screws are symmetrically inserted at both ends of the mounting bracket, and the adjusting screws are threadedly connected to the mounting bracket. Each of the two adjusting screws has a clamping block fixedly connected to its opposite end, and a rotating handle is fixedly connected to the end of each adjusting screw away from the clamping block.
[0018] By adopting the above technical solution: Through this structural design, the operator can quickly adjust the position of the clamping block by rotating the handle, and firmly fix the mounting bracket on the gearbox housing. The structure is simple and easy to operate, and it is suitable for the on-site operation needs of various types of gearboxes.
[0019] Compared with the prior art, the present invention has the following beneficial effects:
[0020] 1. By setting up an adjusting screw and clamping block structure, the mounting bracket can be quickly and stably fixed on the gearbox housing, ensuring that the tool will not shift or shake during use, thus improving the stability and safety of operation; at the same time, the electric telescopic rod drives the pull head to expand and contract, enabling precise clamping and release of the bearing inner ring, avoiding damage to the equipment caused by traditional hammering methods, effectively protecting the bearing seat and journal surface, and extending the service life of the equipment.
[0021] 2. By setting up forward and reverse motors to drive the threaded sleeve to move the pulling screw up and down, the pulling process is automated. With the controller, the pulling force and stroke can be precisely adjusted. It is suitable for the disassembly needs of different bearing models, significantly improving disassembly efficiency and ease of operation. At the same time, the guiding structure of the guide rod and sleeve ensures that the pulling process is smooth and does not deviate, improving the reliability of tool operation and reducing manual labor intensity. It is particularly suitable for wind turbine maintenance operations at high altitudes or in complex environments, and has good application prospects and promotion value. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the overall structure of the special tool for removing the generator side bearing of the gearbox intermediate speed shaft according to this utility model;
[0023] Figure 2 This is a schematic diagram of the drive mechanism of the special tool for removing the generator side bearing of the gearbox intermediate speed shaft according to this utility model;
[0024] Figure 3 This is a schematic diagram of the pulling mechanism of the special tool for removing the generator side bearing of the gearbox intermediate speed shaft of this utility model.
[0025] Figure 4 This is a schematic diagram of the pulling body of the special tool for removing the generator side bearing of the gearbox intermediate speed shaft of this utility model.
[0026] In the diagram: 1. Mounting bracket; 2. Drive mechanism; 21. Forward and reverse motor; 22. Drive bevel gear; 23. Threaded sleeve; 24. Transmission bevel gear; 3. Pulling mechanism; 31. Pulling screw; 32. Pulling body; 321. Pulling plate; 322. Slide groove; 3221. Guide groove; 323. Pulling head; 3231. Guide block; 324. Electric telescopic rod; 33. Top plate; 34. Guide rod; 4. Controller; 5. Sleeve rod; 6. Adjusting screw; 7. Clamping block; 8. Rotary handle. Detailed Implementation
[0027] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] Please see Figure 1-4 This utility model provides a technical solution:
[0031] A special tool for removing the generator side bearing of the gearbox medium speed shaft includes a mounting bracket 1. A drive mechanism 2 is set in the middle of the mounting bracket 1. A pulling mechanism 3 is threadedly connected to the middle of the drive mechanism 2. A controller 4 is fixedly installed at the upper end of the mounting bracket 1. Two adjusting screws 6 are symmetrically inserted at both ends of the mounting bracket 1 and are threadedly connected to the mounting bracket 1. A clamping block 7 is fixedly connected to the opposite ends of the two adjusting screws 6. A rotating handle 8 is fixedly connected to the end of the two adjusting screws 6 away from the clamping block 7.
[0032] In this embodiment, the pulling mechanism 3 includes a pulling screw 31, which is threadedly connected to the drive mechanism 2. The lower end of the pulling screw 31 is fixedly connected to the pulling body 32, and the upper end of the pulling screw 31 is fixedly connected to the top plate 33. Guide rods 34 are fixedly connected to the left and right sides of the lower end of the top plate 33. Sleeve rods 5 are fixedly installed on the left and right sides of the upper end of the mounting frame 1, and the two guide rods 34 are slidably connected to the two sleeve rods 5 respectively. The drive mechanism 2 includes a forward and reverse motor 21 and a threaded sleeve 23. The forward and reverse motor 21 is fixedly installed on the mounting frame 1, and the output end of the forward and reverse motor 21 is fixedly connected to the drive bevel gear 22. The threaded sleeve 23 is movably inserted and connected to the mounting frame 1 through a bearing. The lower part of the threaded sleeve 23 is fixedly sleeved with a transmission bevel gear 24 that meshes with the drive bevel gear 22. The inner surface of the threaded sleeve 23 is provided with a spiral pattern that is threadedly connected to the pulling screw 31. The pulling screw 31 is inserted and connected to the threaded sleeve 23 and threadedly connected to the threaded sleeve 23.
[0033] The above scheme involves starting the forward and reverse motor 21 via controller 4. The motor output drives the drive bevel gear 22 to rotate. Since the drive bevel gear 22 meshes with the transmission bevel gear 24 fixed at the lower part of the threaded sleeve 23, when the drive bevel gear 22 rotates, it drives the transmission bevel gear 24 and the threaded sleeve 23 fixed on it to rotate synchronously. Because the threaded sleeve 23 has a spiral pattern inside, it forms a threaded engagement with the pull screw 31. Therefore, during the rotation of the threaded sleeve 23, the pull screw 31 moves up and down in the vertical direction under the guidance of the guide rod 34 and the sleeve rod 5. The lower end of the pull screw 31 is fixedly connected to the pull body 32. As the pull screw 31 moves, the pull body 32 rises and falls synchronously. This scheme is suitable for the disassembly requirements of different types of bearings, significantly improving disassembly efficiency and ease of operation, enhancing the reliability of tool operation, and reducing manual labor intensity. It is particularly suitable for wind turbine maintenance operations in high-altitude or complex environments, and has good application prospects and promotion value.
[0034] In this embodiment, the drawing body 32 includes a drawing plate platform 321, which is fixedly connected to the lower end of the drawing screw 31. The outer surface of the drawing plate platform 321 is provided with four sliding grooves 322 in an annular shape. A drawing head 323 is slidably connected in each of the four sliding grooves 322. One end of the drawing head 323 is fixedly connected to an electric telescopic rod 324, and the electric telescopic rod 324 is embedded in the drawing plate platform 321. Two guide grooves 3221 are symmetrically opened on the inner surface of the sliding grooves 322. Two guide blocks 3231 that are slidably connected to the guide grooves 3221 are symmetrically connected on the outer surface of the drawing head 323.
[0035] Through the above scheme: the operator controls the electric telescopic rod 324 to move via the controller 4. The electric telescopic rod 324 pushes the pull head 323 to slide outward along the slide groove 322. At the same time, through the cooperation between the guide block 3231 and the guide groove 3221, the four pull heads 323 are evenly unfolded under the annular distribution of the pull body 32 and firmly locked onto the inner surface of the bearing inner ring. By using the electric telescopic rod 324 to drive the pull head 323 to unfold and retract, precise clamping and release of the bearing inner ring can be achieved, avoiding the damage to the equipment caused by traditional knocking methods, effectively protecting the bearing seat and journal surface, and extending the service life of the equipment.
[0036] It should be noted that this utility model is a special tool for removing the generator side bearing of the gearbox's intermediate speed shaft. During use, the operator installs the tool entirely on the outside of the generator side bearing of the gearbox's intermediate speed shaft. By rotating the handles 8 at both ends, the adjusting screw 6 is rotated, thereby pushing the two clamping blocks 7 to one side of the gearbox. The two clamping blocks 7 cooperate with each other to stably fix the mounting bracket 1 on the gearbox housing, ensuring that the tool will not shift or shake during subsequent operations. Subsequently, the operator starts the forward and reverse motor 21 through the controller 4. The motor output drives the drive bevel gear 22 to rotate. Since the drive bevel gear 22 is meshed with the transmission bevel gear 24 fixed at the lower part of the threaded sleeve 23, when the drive bevel gear 22 rotates, it will drive the transmission bevel gear 24 and the threaded sleeve 23 fixed on it to rotate synchronously. Since the threaded sleeve 23 has a spiral pattern inside, it forms a threaded engagement with the pull screw 31. Therefore, during the rotation of the threaded sleeve 23, the pull screw 31 moves downward in the vertical direction under the guidance of the guide rod 34 and the sleeve rod 5. The lower end of the drawing screw 31 is fixedly connected to the drawing body 32. As the drawing screw 31 descends, the drawing body 32 moves down synchronously until the drawing head 323 below it approaches the inner ring surface of the bearing. The operator controls the electric telescopic rod 324 through the controller 4. The electric telescopic rod 324 pushes the drawing head 323 to slide outward along the slide groove 322. At the same time, through the cooperation between the guide block 3231 and the guide groove 3221, the four drawing heads 323 are evenly spread out under the annular distribution of the drawing body 32 and firmly locked onto the bearing. On the inner surface of the inner ring; after the four pulling heads 323 have finished gripping the inner ring of the bearing, the controller 4 controls the forward and reverse motors 21 to run in the opposite direction, driving the threaded sleeve 23 to rotate in the opposite direction, thereby causing the pulling screw 31 to move upward. The pulling screw drives the pulling body 32 at its lower end and the four pulling heads 323 to move upward synchronously, applying a uniform pulling force to the bearing, so that the bearing can be smoothly removed from the shaft position, completing the removal operation; throughout the pulling process, the guide rod 34 and the sleeve rod 5 always maintain the vertical movement trajectory of the pulling screw 31.
[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A special tool for removing the generator side bearing of the intermediate speed shaft of the gearbox, including a mounting bracket (1), characterized in that: The mounting bracket (1) is provided with a drive mechanism (2) in the middle, and a pulling mechanism (3) is threadedly connected to the middle of the drive mechanism (2). A controller (4) is fixedly installed at the upper end of the mounting bracket (1). The pulling mechanism (3) includes a pulling screw (31), which is threadedly connected to the driving mechanism (2). The lower end of the pulling screw (31) is fixedly connected to a pulling body (32), and the upper end of the pulling screw (31) is fixedly connected to a top plate (33). Guide rods (34) are fixedly connected to the lower left and right sides of the top plate (33).
2. The special tool for removing the generator side bearing of the gearbox intermediate speed shaft according to claim 1, characterized in that: The mounting bracket (1) has sleeve rods (5) fixedly installed on both the left and right sides of its upper end, and the two guide rods (34) are slidably connected to the two sleeve rods (5) respectively.
3. The special tool for removing the generator side bearing of the gearbox intermediate speed shaft according to claim 1, characterized in that: The drive mechanism (2) includes a forward and reverse motor (21) and a threaded sleeve (23). The forward and reverse motor (21) is fixedly mounted on the mounting frame (1). The output end of the forward and reverse motor (21) is fixedly connected to a drive bevel gear (22). The threaded sleeve (23) is movably connected to the mounting frame (1) through a bearing. The lower part of the threaded sleeve (23) is fixedly sleeved with a transmission bevel gear (24) that meshes with the drive bevel gear (22).
4. The special tool for removing the generator side bearing of the gearbox intermediate speed shaft according to claim 3, characterized in that: The inner surface of the threaded sleeve (23) is provided with a spiral pattern that is threaded to the pull screw (31). The pull screw (31) is inserted into the threaded sleeve (23) and threaded to the threaded sleeve (23).
5. The special tool for removing the generator side bearing of the gearbox intermediate speed shaft according to claim 1, characterized in that: The drawing body (32) includes a drawing plate platform (321), which is fixedly connected to the lower end of the drawing screw (31). The outer surface of the drawing plate platform (321) is provided with four sliding grooves (322) in an annular shape. A drawing head (323) is slidably connected in each of the four sliding grooves (322). One end of the drawing head (323) is fixedly connected to an electric telescopic rod (324), and the electric telescopic rod (324) is embedded in the drawing plate platform (321).
6. The special tool for removing the generator side bearing of the gearbox intermediate speed shaft according to claim 5, characterized in that: The inner surface of the slide (322) is symmetrically provided with two guide grooves (3221), and the outer surface of the pull head (323) is symmetrically connected with two guide blocks (3231) that are slidably connected to the guide grooves (3221).
7. The special tool for removing the generator side bearing of the gearbox intermediate speed shaft according to claim 1, characterized in that: The mounting bracket (1) has two adjusting screws (6) symmetrically inserted at both ends, and the adjusting screws (6) are threadedly connected to the mounting bracket (1). The opposing ends of the two adjusting screws (6) are fixedly connected to clamps (7), and the ends of the two adjusting screws (6) away from the clamps (7) are fixedly connected to handles (8).