A positioning mechanism for propeller installation
Patent Information
- Application Number
- CN202522367589.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-07
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-07
AI Technical Summary
现有螺旋桨安装定位多依赖人工操作，具体存在以下问题：一是定心精度低，传统方式常通过目视或简单工装进行中心定位，易因操作误差导致螺旋桨与对接部件同轴度偏差过大，进而引发运行振动、噪音甚至结构磨损；二是调整过程繁琐，螺旋桨与对接部件的周向角度对齐、轴向位置校准需多次手动调整，不仅耗时费力，且难以保证一致性；三是夹持稳定性不足，人工夹持或简易夹具易因受力不均导致螺旋桨偏移，影响装配精度；四是通用性差，不同规格的螺旋桨需匹配不同定位工装，更换频繁，增加了装配成本和时间
该用于螺旋桨安装的定位机构，通过安装台顶端的定心轴与螺旋桨轮毂中心孔配合实现初步定心，配合螺纹柱与螺纹槽的调节可适配不同高度的螺旋桨，结合夹持机构从周向稳定夹紧，有效避免了传统人工定位的偏移问题，显著提升了螺旋桨的定心精度；同时，转动机构可带动螺旋桨周向旋转，第一电机可带动对接部件同步角度调整，确保两者对接结构精准对齐，大幅降低了装配误差。
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Figure CN224826217U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of propeller manufacturing and processing technology, specifically a positioning mechanism for propeller installation. Background Technology
[0002] As is well known, in the assembly process of a propeller, it is necessary to precisely align the propeller with the drive shaft or other mating components. The assembly accuracy (such as coaxiality and circumferential angle alignment) directly affects the propeller's operational stability and service life. Existing propeller installation and positioning methods largely rely on manual operation, which presents the following problems: First, low centering accuracy. Traditional methods often rely on visual inspection or simple tooling for center positioning, which can easily lead to excessive coaxiality deviation between the propeller and the mating component due to operational errors, resulting in operational vibration, noise, and even structural wear. Second, cumbersome adjustment processes. Circumferential angle alignment and axial position calibration of the propeller and mating component require multiple manual adjustments, which are not only time-consuming and labor-intensive but also difficult to ensure consistency. Third, insufficient clamping stability. Manual clamping or simple clamps can easily cause propeller displacement due to uneven force, affecting assembly accuracy. Fourth, poor versatility. Different specifications of propellers require different positioning tooling, leading to frequent changes and increasing assembly costs and time. Therefore, there is an urgent need for a propeller installation and positioning mechanism that can achieve precise centering, convenient adjustment, stable clamping, and strong adaptability to overcome the shortcomings of existing technologies. Utility Model Content
[0003] (a) Technical problems to be solved In view of the shortcomings of the prior art, this utility model provides a positioning mechanism for propeller installation.
[0004] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a positioning mechanism for propeller installation, comprising a worktable, a controller, a slide rail, and a bearing seat on the worktable, an mounting platform on the bearing seat, a rotating mechanism between the worktable and the mounting platform, a clamping mechanism at the top of the mounting platform, a threaded groove at the center of the top of the mounting platform, a threaded post on the threaded groove, a centering shaft at the top of the threaded post, an electric slider on the slide rail, a lifting device at the top of the electric slider, a lifting platform at the top of the lifting device, a first motor on the lifting platform, a mounting plate at the output end of the first motor, a first telescopic device and a fixing plate on the mounting plate, a slot on the fixing plate, the output end of the first telescopic device passing through the slot and having a clamping plate.
[0005] Furthermore, the rotating mechanism includes a second motor, which is mounted on the bottom end of the worktable. A reducer is provided between the output end of the second motor and the bearing seat, and the output end of the reducer is fixed at the center position of the bottom end of the mounting table.
[0006] Furthermore, both the first motor and the second motor are servo motors.
[0007] Furthermore, the clamping mechanism includes a second telescopic device, which is mounted on the top of the mounting platform, and the output end of the second telescopic device is provided with an arc-shaped plate.
[0008] Furthermore, the clamping mechanism is provided in two symmetrical arrangements.
[0009] Furthermore, the outer side of the arc-shaped plate is provided with an anti-slip sleeve, and the outer surface of the anti-slip sleeve is provided with anti-slip serrations.
[0010] Furthermore, both the first telescopic device and the second telescopic device are electrically operated telescopic poles.
[0011] (III) Beneficial Effects Compared with the prior art, the present invention provides a positioning mechanism for propeller mounting, which has the following advantages: The positioning mechanism for propeller installation achieves initial centering by engaging the centering shaft at the top of the mounting platform with the center hole of the propeller hub. Adjustments to the threaded post and threaded groove allow for adaptation to propellers of different heights. Combined with the clamping mechanism, it provides stable circumferential clamping, effectively avoiding the offset problems associated with traditional manual positioning and significantly improving the propeller's centering accuracy. Simultaneously, the rotating mechanism drives the propeller to rotate circumferentially, and the first motor drives the synchronous angle adjustment of the docking components, ensuring precise alignment of the docking structures and greatly reducing assembly errors.
[0012] By controlling the rotating mechanism, electric slider, lifting device and telescopic device, etc., the propeller and docking parts are automatically positioned, clamped and adjusted, reducing manual intervention and reducing the labor intensity of operators. The linkage and cooperation of each component does not require multiple manual calibrations, which significantly shortens the assembly time and improves the assembly efficiency.
[0013] The clamping mechanism drives the actuator (such as an arc plate) to clamp the propeller circumferentially through a telescopic device. The first telescopic device drives the clamping plate to cooperate with the fixed plate to clamp the docking parts. The double clamping structure ensures the stability of the propeller and docking parts during the assembly process, avoids the offset caused by vibration or adjustment, and ensures the reliability of the assembly process.
[0014] The fit between the threaded column and the threaded groove allows for adjustment of the centering shaft height, accommodating propellers of different thicknesses; the travel of the telescopic device is adjustable, adapting to propeller hubs and docking components of different diameters, eliminating the need to change tooling for different product specifications, reducing equipment investment costs, and expanding the applicability of the mechanism. Attached Figure Description
[0015] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This is a schematic diagram of the third-view structure of this utility model; Figure 4 This is a frontal half-sectional view of the structure of this utility model.
[0016] In the diagram: 1. Workbench; 2. Controller; 3. Slide rail; 4. Bearing seat; 5. Mounting platform; 6. Threaded column; 7. Centering shaft; 8. Electric slider; 9. Lifting device; 10. Lifting platform; 11. First motor; 12. Mounting plate; 13. First telescopic device; 14. Fixing plate; 15. Clamping plate; 16. Second motor; 17. Reducer; 18. Second telescopic device; 19. Arc plate. Detailed Implementation
[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0018] Please see Figures 1 to 4This utility model relates to a positioning mechanism for propeller installation, comprising a worktable 1, a controller 2, a slide rail 3, and a bearing seat 4 on the worktable 1, a mounting platform 5 on the bearing seat 4, a rotating mechanism between the worktable 1 and the mounting platform 5, a clamping mechanism at the top of the mounting platform 5, a threaded groove at the center of the top of the mounting platform 5, a threaded post 6 on the threaded groove, a centering shaft 7 at the top of the threaded post 6, an electric slider 8 on the slide rail 3, a lifting device 9 at the top of the electric slider 8, and a lifting platform 10 at the top of the lifting device 9. A first motor 11 is provided on the mounting plate 5. The output end of the first motor 11 is provided with a mounting plate 12. The mounting plate 12 is provided with a first telescopic device 13 and a fixing plate 14. The fixing plate 14 has a slot. The output end of the first telescopic device 13 passes through the slot and is provided with a clamping plate 15. In this embodiment, the propeller is initially centered and clamped by manually aligning the center hole of the propeller hub with the top of the centering shaft 7 and slowly inserting the centering shaft 7 to achieve center positioning. Then, the clamping mechanism at the top of the mounting plate 5 is activated by the controller 2, so that the execution end of the clamping mechanism clamps the hub from the circumference, completing the initial fixation of the propeller and preventing deviation during subsequent adjustments. The component to be docked with the propeller is placed on one side of the fixed plate 14. The controller 2 controls the output end of the first telescopic device 13 to move the clamping plate 15 linearly, so that the clamping plate 15 cooperates with the fixed plate 14 to clamp the component on one side. The controller 2 drives the lifting device 9 to extend and retract, adjusting the height of the lifting platform 10, and aligning the component with the assembly position. The electric slider 8 on the slide rail 3 moves along the slide rail 3, driving the lifting device 9 and the lifting platform 10 to move synchronously, so that the component clamped by the fixed plate 14 and the clamping plate 15 docks on the propeller hub. The assembled components, such as the parts used in the assembly of the propeller hub, are not described in detail in this structure. The controller 2 starts the rotation mechanism between the workbench 1 and the mounting platform 5, driving the mounting platform 5 and the propeller to rotate around the bearing seat 4, adjusting the circumferential angle of the propeller. The first motor 11 is started, driving the mounting plate 12 to rotate, synchronously adjusting the angle of the clamped component, so that the two docking structures are precisely aligned. After assembly, controller 2 controls the reset of each component: the clamping mechanism is released, the first telescopic device 13 is retracted, the electric slider 8 returns to its position, and the lifting device 9 is lowered to remove the assembled components and prepare for the next operation.
[0019] In this design, the rotating mechanism includes a second motor 16, which is mounted on the bottom of the workbench 1. A reducer 17 is located between the output end of the second motor 16 and the bearing seat 4. The output end of the reducer 17 is fixed at the center of the bottom of the mounting platform 5. The second motor 16 provides rotational power, which is then reduced in speed by the reducer 17 and transmitted to the mounting platform 5. The reducer 17 uses a gear / worm gear transmission to convert the high speed of the motor into the low speed of the mounting platform 5, while simultaneously amplifying the torque. The reduction ratio equals the torque amplification ratio. This avoids the mounting platform 5 rotating too fast due to direct motor drive, prevents the propeller from shifting due to inertia, and ensures stability during angle adjustment. After amplifying the torque, even if the propeller is heavy, the mounting platform 5 can rotate easily, avoiding motor overload. The second motor 16 is mounted on the bottom of the workbench 1 and does not occupy the assembly space above the mounting platform 5.
[0020] In this solution, both the first motor 11 and the second motor 16 are servo motors. The servo motors can receive pulse signals from the controller 2, which sends a target rotation angle signal. The encoder provides real-time feedback on the actual rotation angle of the motor, automatically correcting any deviations to ensure precise execution of commands. Compared to ordinary asynchronous motors, servo motors offer a rotation angle accuracy of ±0.01°, precisely controlling the alignment angle between the propeller and the drive shaft, significantly improving assembly coaxiality. The servo motor's start / stop response time is ≤0.1s, allowing for rapid attitude adjustment to meet the high-efficiency requirements of batch assembly. The controller 2 can set the maximum motor torque to prevent damage to the propeller or drive shaft due to excessive torque during clamping or rotation.
[0021] In this solution, the clamping mechanism includes a second telescopic device 18, which is installed on the top of the mounting platform 5. The output end of the second telescopic device 18 is provided with an arc-shaped plate 19. Two clamping mechanisms are provided and symmetrically arranged. An anti-slip sleeve is provided on the outer side of the arc-shaped plate 19, and the outer surface of the anti-slip sleeve is provided with anti-slip teeth. The clamping mechanism, consisting of the second telescopic device 18 installed on the top of the mounting platform 5 and the arc-shaped plate 19 connected to its output end, is controlled by a controller 2. This controller drives the motor of the second telescopic device 18 to operate, driving the internal lead screw / gear structure, causing the piston rod to move the arc-shaped plate 19 linearly. When the telescopic device extends, the arc-shaped plate 19 approaches the propeller hub; when the telescopic device retracts, the arc-shaped plate 19 moves away from the hub. The inner arc surface of the arc-shaped plate 19 matches the outer circular contour of the propeller hub, increasing the contact area by more than 30% compared to flat clamping, thus avoiding excessive local pressure that could cause hub deformation. The extension stroke of the second telescopic device 18 can be precisely set by the controller 2, indirectly controlling the clamping force (e.g., setting a low clamping force for aluminum alloy hubs and a high clamping force for steel hubs), adapting to propellers of different materials. No manual tightening of bolts is required; one-button control via the controller 2 reduces manual labor intensity and improves assembly efficiency. The two symmetrical clamping mechanisms synchronously receive commands from the controller 2, and the second telescopic device 18 extends / retracts synchronously, applying equal and opposite clamping forces from both sides of the hub, ensuring that the resultant line of the clamping forces coincides with the axis of the centering shaft 7 (i.e., passing through the center of the hub). The inner clamping side (the side in contact with the wheel hub) of the arc plate 19 is provided with an anti-slip sleeve. The outer surface of the anti-slip sleeve (i.e. the surface in contact with the wheel hub) is machined with anti-slip teeth. The anti-slip sleeve is made of elastic rubber material to increase the coefficient of friction with the surface of the wheel hub. The anti-slip teeth are sawtooth or grid-like and can be embedded into the tiny pits on the surface of the wheel hub to form a mechanical engagement and further restrict relative sliding.
[0022] In this design, both the first telescopic device 13 and the second telescopic device 18 are electric telescopic rods. The electric telescopic rods use a DC motor as a power source, which drives a lead screw to rotate after gear reduction. The lead screw drives a nut (connected to the piston rod) to move linearly, thus achieving the extension and retraction of the piston rod. The controller 2 adjusts the extension and retraction direction by controlling the forward and reverse rotation of the motor, and adjusts the extension and retraction stroke by controlling the motor's running time. The extension and retraction stroke accuracy can reach ±0.1mm, and the clamping range can be precisely adjusted according to different diameter hubs (e.g., φ50-φ300mm). It has strong versatility and requires no replacement of the telescopic device.
[0023] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A positioning mechanism for propeller mounting, comprising a worktable (1), characterized in that, The workbench (1) is provided with a controller (2), a slide rail (3) and a bearing seat (4). The bearing seat (4) is provided with a mounting platform (5). A rotating mechanism is provided between the workbench (1) and the mounting platform (5). The top of the mounting platform (5) is provided with a clamping mechanism. A threaded groove is provided at the center of the top of the mounting platform (5). A threaded column (6) is provided on the threaded groove. A centering shaft (7) is provided at the top of the threaded column (6). An electric slider (8) is provided on the slide rail (3). A lifting device (9) is provided at the top of the electric slider (8). A lifting platform (10) is provided at the top of the lifting device (9). A first motor (11) is provided on the lifting platform (10). A mounting plate (12) is provided at the output end of the first motor (11). A first telescopic device (13) and a fixing plate (14) are provided on the mounting plate (12). A slot is provided on the fixing plate (14). The output end of the first telescopic device (13) passes through the slot and is provided with a clamping plate (15).
2. The positioning mechanism for propeller mounting according to claim 1, characterized in that, The rotating mechanism includes a second motor (16), which is installed at the bottom of the workbench (1). A reducer (17) is provided between the output end of the second motor (16) and the bearing seat (4). The output end of the reducer (17) is fixed at the center of the bottom of the mounting platform (5).
3. A positioning mechanism for propeller mounting according to claim 2, characterized in that, Both the first motor (11) and the second motor (16) are servo motors.
4. A positioning mechanism for propeller mounting according to claim 1, characterized in that, The clamping mechanism includes a second telescopic device (18), which is mounted on the top of the mounting platform (5), and the output end of the second telescopic device (18) is provided with an arc plate (19).
5. A positioning mechanism for propeller mounting according to claim 4, characterized in that, The clamping mechanism has two parts, which are arranged symmetrically.
6. A positioning mechanism for propeller mounting according to claim 4, characterized in that, The outer side of the arc plate (19) is provided with an anti-slip sleeve, and the outer surface of the anti-slip sleeve is provided with anti-slip serrations.
7. A positioning mechanism for propeller mounting according to claim 4, characterized in that, Both the first telescopic device (13) and the second telescopic device (18) are electric telescopic poles.