Assembly tool and assembly method for a rim propeller

Abstract

The present application relates to the technical field of rim propeller, and particularly relates to an assembly tool for rim propeller and an assembly method thereof. The assembly tool comprises a bottom disc, a top disc, a plurality of positioning blocks and a plurality of supporting seats. The bottom disc is provided with a sleeve concentrically. The top disc is provided with a guide shaft concentrically, the first end of the guide shaft is capable of sliding in the sleeve, and the second end of the guide shaft is capable of being clamped with the sleeve. The plurality of positioning blocks are arranged around the axis of the top disc. The positioning blocks are detachably connected with the side wall of the top disc. The bottom surface of the bottom disc is in abutment with the top surface of the plurality of supporting seats. The detachable connection between the positioning blocks and the side wall of the top disc enables the positioning blocks and the top disc to be flexibly detached, so that after the stator, the rotor and the pair of water-lubricated bearings are installed, the top disc can be detached, and thus the installation of the water-lubricated bearings can be realized without removing the assembly tool, the process is simplified, and the risk of knocking the water-lubricated bearings and the stator and rotor caused by frequent disassembly and assembly of the assembly tool is reduced.

Description

Technical Field

[0001] This invention relates to the field of rim propeller technology, and more specifically to an assembly fixture and assembly method for a rim propeller. Background Technology

[0002] Flange thrusters are a new type of marine electric propulsion device. They feature no complex shaft system, no cooling or lubrication system, and offer advantages such as high efficiency, low noise, and high safety. They are suitable for various special-purpose vessels and underwater vehicles.

[0003] The unique structure of rim-mounted propellers places special demands on their assembly process. Classified by stator and rotor type, rim-mounted propellers belong to the category of permanent magnet motors with a small length-to-diameter ratio (short and thick). This type of motor typically employs vertical assembly for stator and rotor assembly. However, rim-mounted motors use water-lubricated bearings. The gap between the bearing surface and the rotor of a water-lubricated bearing is generally around 1mm, much smaller than the air gap between the stator and rotor in a conventional permanent magnet motor. Furthermore, the bearing surface of water-lubricated bearings requires high machining precision; any impact can significantly affect the bearing's performance. Therefore, throughout the assembly process, a high degree of coaxiality must be maintained between the motor's stator and rotor to prevent any contact with the water-lubricated bearing.

[0004] Because the rotor of a permanent magnet motor is magnetic, it presents a significant technological challenge during motor assembly. Conventional permanent magnet motor stator-rotor assembly often involves inserting a copper sheet or epoxy board between the stator and rotor air gap, allowing the rotor and stator to move relative to each other along the copper sheet or epoxy board. This inevitably results in the stator and rotor being attracted to each other in one direction through the copper sheet or epoxy board. For water-lubricated bearings, the small gap between the stator and rotor makes them highly susceptible to impact. Alternatively, conventional motors can use guide shafts for vertical stator-rotor assembly, but this always requires disassembling the tooling on one side of the water-lubricated bearing before assembly. Otherwise, the tooling will interfere with the water-lubricated bearing, making it impossible to remove the tooling or install the bearing. Frequent disassembly of the tooling leads to low assembly efficiency and makes it difficult to ensure that the bearings on both sides of the stator and rotor are protected from impact, resulting in a high installation risk. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an assembly fixture and assembly method for a rim propeller, which solves the technical problem that the rim propeller is prone to collision with the water-lubricated bearing during installation.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the assembly fixture for the rim thruster of the present invention includes:

[0009] The chassis has sleeves concentrically arranged on it;

[0010] A top plate, on which a guide shaft is concentrically arranged, the first end of the guide shaft being able to slide within the sleeve, and the second end of the guide shaft being able to engage with the sleeve;

[0011] Multiple positioning blocks are arranged around the axis of the top plate; the positioning blocks are detachably connected to the side wall of the top plate.

[0012] Multiple support bases, with the bottom surface of the chassis abutting against the top surface of the multiple support bases.

[0013] Optionally, the sidewall of the top plate is provided with a plurality of sliding grooves along its axial direction;

[0014] The positioning block can slide vertically within the groove.

[0015] Optionally, the positioning block is provided with a first threaded hole and a second threaded hole;

[0016] The first threaded hole includes a countersunk hole and a through hole that are connected to each other, and the countersunk hole is located close to the guide shaft;

[0017] The second threaded hole communicates with the third threaded hole formed on the slide groove; the third threaded hole penetrates the side wall of the top plate.

[0018] Optionally, a support platform is provided between the first end of the guide shaft and the second end of the guide shaft;

[0019] The support platform abuts against the top surface of the sleeve.

[0020] Optionally, the guide shaft extends through the top and bottom surfaces of the chassis;

[0021] In the vertical direction, the distance between the bottom surface of the guide shaft and the bottom surface of the chassis is less than the height of the support base.

[0022] Optionally, both the chassis and the top plate are provided with multiple lifting holes.

[0023] Optionally, an annular groove is provided on the chassis, and the annular groove communicates with the side wall of the chassis;

[0024] In the vertical direction, a fastening bolt passes through the annular groove.

[0025] Optionally, the support base includes a pair of hollow rings and multiple columns;

[0026] The two ends of the column are connected to a pair of hollow rings in a one-to-one correspondence.

[0027] Furthermore, the present invention also provides an assembly method for a rim thruster, the assembly method being implemented based on the assembly fixture for the rim thruster described above, the assembly method comprising:

[0028] Motor assembly: The chassis is placed on the plurality of support seats; the non-drive end water-lubricated bearing is installed on the chassis; the stator is installed on the non-drive end water-lubricated bearing;

[0029] Remove multiple positioning blocks from the top plate and connect them to the inside of the rotor yoke; lift the top plate to the positioning blocks and connect the multiple positioning blocks to the top plate;

[0030] Lift the top plate and slide the guide shaft vertically into the sleeve until the second end of the guide shaft is engaged with the sleeve.

[0031] The water-lubricated bearing at the drive end is installed on the stator;

[0032] Tooling disassembly: Disconnect the top plate from the positioning blocks, and remove the top plate by hoisting; remove multiple positioning blocks; remove the chassis.

[0033] Optionally, the positioning blocks and the locations where they connect to the top plate are numbered.

[0034] (III) Beneficial Effects

[0035] The beneficial effects of this invention are:

[0036] The assembly fixture adopts a vertical installation method, with the bottom surface of the chassis abutting against the top surface of multiple support seats, so that the chassis is suspended in the air. After the second end of the guide shaft is engaged with the sleeve, the first end of the guide shaft can be suspended in the air, allowing the top plate to fall to a fixed position, which facilitates the subsequent installation of the stator, rotor and a pair of water-lubricated bearings. The installation method is simple and the assembly efficiency is high.

[0037] The guide shaft and sleeve are concentrically arranged and can be engaged, which can limit the radial movement of the guide shaft, effectively avoiding the situation where the stator and rotor attract each other and collide with the water-lubricated bearing, reducing the assembly difficulty and improving the assembly yield.

[0038] The rotor's inner wall has multiple mounting holes for assembling with the propeller. This invention utilizes these mounting holes to assist in assembly using a tooling system. The positioning block is detachably connected to the mounting holes and also detachably connected to the top plate. Positioned between the rotor and the top plate, the positioning block provides radial restraint to the top plate, preventing it from colliding with the rotor during removal and improving assembly yield.

[0039] Multiple positioning blocks are arranged around the axis of the top plate, and the positioning blocks are detachably connected to the side wall of the top plate. The detachable connection allows the positioning blocks to be flexibly separated from the top plate, which facilitates the storage of multiple positioning blocks when the assembly fixture is not in use, and also allows the top plate to be removed after the stator, rotor, and a pair of water-lubricated bearings are installed. Therefore, the water-lubricated bearings can be installed without removing the assembly fixture, which simplifies the process and reduces the risk of damage to the water-lubricated bearings and stator and rotor caused by frequent disassembly and assembly of the assembly fixture. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the assembly fixture for the rim thruster of the present invention;

[0041] Figure 2 This is a cross-sectional view of the assembly tooling for the rim thruster of the present invention in its initial assembly position during use;

[0042] Figure 3 This is a cross-sectional view of the assembly fixture for the rim thruster of the present invention after assembly.

[0043] [Explanation of Labels in the Attached Image]

[0044] 1: Chassis; 11: Sleeve; 12: Lifting hole; 13: Annular groove; 14: Fastening bolt;

[0045] 2: Top plate; 21: Guide shaft; 22: Slide groove; 221: Third threaded hole; 23: Support platform; 24: Ring;

[0046] 3: Positioning block; 31: First threaded hole; 32: Second threaded hole;

[0047] 4: Support base; 41: Hollow ring; 42: Column;

[0048] 5: Water-lubricated bearing at the non-driving end;

[0049] 6: Water-lubricated bearing at the drive end;

[0050] 7: Stator;

[0051] 8: Rotor. Detailed Implementation

[0052] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0054] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] See Figure 1 This invention provides an assembly fixture for a rim-driven propeller, comprising a chassis 1, a top plate 2, multiple positioning blocks 3, and multiple support seats 4. A sleeve 11 is concentrically arranged on the chassis 1; a guide shaft 21 is concentrically arranged on the top plate 2, the first end of which can slide within the sleeve 11, and the second end of which can engage with the sleeve 11, i.e., the diameter of the second end is larger than the diameter of the first end; multiple positioning blocks 3 are arranged around the axis of the top plate 2; the positioning blocks 3 are detachably connected to the sidewall of the top plate 2; and the bottom surface of the chassis 1 abuts against the top surfaces of the multiple support seats 4.

[0057] like Figure 2 and Figure 3 As shown, the assembly fixture adopts a vertical installation method, with the bottom surface of the chassis 1 abutting against the top surface of multiple support seats 4, so that the chassis 1 is suspended in the air. After the second end of the guide shaft 21 is engaged with the sleeve 11, the first end of the guide shaft 21 can be suspended in the air, allowing the top plate 2 to fall to a fixed position, which facilitates the subsequent installation of the stator 7, rotor 8 and a pair of water-lubricated bearings. The installation method is simple and the assembly efficiency is high.

[0058] The guide shaft 21 and the sleeve 11 are concentrically arranged and can be engaged. This can limit the radial movement of the guide shaft 21, effectively preventing the stator and rotor 8 from attracting each other and colliding with the water-lubricated bearing, reducing assembly difficulty and improving assembly yield.

[0059] The rotor 8 has multiple mounting holes on its inner wall for assembly with the propeller. This invention utilizes these mounting holes to assist in assembly using a tooling assembly system. The positioning block 3 is detachably connected to the mounting holes and to the top plate 2. Positioned between the rotor 8 and the top plate 2, the positioning block 3 provides radial restraint to the top plate 2, preventing it from colliding with the rotor 8 when the top plate 2 is removed, thus improving assembly yield.

[0060] Multiple positioning blocks 3 are arranged around the axis of the top plate 2, and the positioning blocks 3 are detachably connected to the side wall of the top plate 2. The detachable connection allows the positioning blocks 3 to be flexibly disassembled from the top plate 2, which facilitates the storage of multiple positioning blocks 3 when the assembly fixture is not in use, and also allows the top plate 2 to be removed after the stator 7, rotor 8 and a pair of water-lubricated bearings are installed. Therefore, the water-lubricated bearings can be installed without removing the assembly fixture, which simplifies the process and reduces the risk of damage to the water-lubricated bearings and the stator and rotor 8 caused by frequent disassembly and assembly of the assembly fixture.

[0061] Furthermore, the sidewall of the top plate 2 is provided with multiple sliding grooves 22 along its axial direction; the positioning block 3 can slide vertically within the sliding groove 22, so that when the top plate 2 is disassembled, the top plate 2 only slides against the positioning block 3 and will not collide with the water-lubricated bearing 6 at the drive end. The sliding groove 22 can limit the rotation of the top plate 2 in the horizontal plane, which facilitates the connection between the positioning block 3 and the top plate 2. Through the effective cooperation of the positioning block 3, the sliding groove 22, the sleeve 11, and the guide shaft 21, the assembly yield of the rim thruster can be greatly improved.

[0062] Secondly, the positioning block 3 is provided with a first threaded hole 31 and a second threaded hole 32; the first threaded hole 31 includes a countersunk hole and a through hole that are connected together, the countersunk hole is located near the guide shaft 21, and the first threaded hole 31 is connected to a first bolt; the second threaded hole 32 is connected to a third threaded hole 221 opened on the slide groove 22, and is connected by a second bolt; the third threaded hole 221 penetrates the side wall of the top plate 2. In this embodiment, the side wall of the top plate 2 is set as an annulus 24, and the annulus 24 and the top plate 2 are concave in shape, which facilitates the disassembly and assembly of the first bolt and the second bolt. The detachable connection is achieved by bolts, the shank of the first bolt is threaded to the through hole, and the nut of the first bolt is embedded in the countersunk hole, so that after the positioning block 3 is connected to the rotor 8, the first bolt will not affect the installation of the top plate 2, that is, it will not cause interference between the first bolt and the slide groove 22, thereby improving the assembly accuracy and further reducing the risk of collision with the water-lubricated bearing during the assembly process.

[0063] In addition, a support platform 23 is provided between the first end and the second end of the guide shaft 21; the support platform 23 abuts against the top surface of the sleeve 11. Specifically, the support platform 23 can be an independent structure, such as a disc welded between the first end and the second end of the guide shaft 21; or it can be an integrated structure, such as machining the guide shaft 21 to machine the second end of the guide shaft 21, as long as it can form the stepped structure of the support platform 23. By providing a support platform 23, the sleeve 11 can limit the descent height of the support platform 23, thereby allowing the top plate 2 and the positioning block 3 to be installed in the preset position, facilitating the subsequent hole alignment and installation of the water-lubricated bearing 6 at the drive end, effectively improving assembly efficiency. Compared to the method of snapping the second end of the guide shaft 21 with the sleeve 11, the method of providing a support platform 23 makes the guide shaft 21 less prone to wear and provides a better limiting effect.

[0064] Furthermore, the guide shaft 21 penetrates both the top and bottom surfaces of the chassis 1; vertically, the distance between the bottom surface of the guide shaft 21 and the bottom surface of the chassis 1 is less than the height of the support base 4. By connecting the guide shaft 21 with the sleeve 11, the descent height of the guide shaft 21 can be limited. Based on this, increasing the height of the support base 4 allows the sleeve 11 to suspend the guide shaft 21 when it is engaged with the sleeve for limiting, thus preventing the bottom end of the guide shaft 21 from contacting the bottom surface or an external rigid surface, thereby preventing wear on the guide shaft 21 and improving the limiting accuracy.

[0065] Secondly, both the chassis 1 and the top plate 2 are provided with multiple lifting holes 12. In this embodiment, the lifting holes 12 are fan-shaped, and multiple lifting holes 12 form a lifting beam. Lifting is carried out through multiple lifting beams. Of course, other lifting methods can also be used, as long as the stability of the top plate 2 can be ensured during lifting. Lifting allows the top plate 2 to be raised and lowered smoothly, realizing the assembly and disassembly of the top plate 2 and the positioning block 3. As for the chassis 1, the lifting holes 12 can enhance the limiting effect on the chassis 1, such as binding the support base 4 to the chassis 1, which facilitates the subsequent disassembly and recycling of the chassis 1.

[0066] See Figure 3 An annular groove 13 is provided on the chassis 1, and the annular groove 13 communicates with the side wall of the chassis 1; in the vertical direction, a fastening bolt 14 passes through the annular groove 13. The annular groove 13 forms a stepped structure, which is adapted to the shape of the mating surface of the non-drive end water-lubricated bearing 5. This can increase the contact surface between the chassis 1 and the multiple support seats 4, and also increase the contact surface between the chassis 1 and the non-drive end water-lubricated bearing 5, thereby improving the support stability and thus improving the assembly accuracy.

[0067] Furthermore, the support base 4 includes a pair of hollow rings 41 and multiple columns 42; the two ends of the columns 42 are connected to the pair of hollow rings 41 one-to-one. In this embodiment, the annular groove 13 is set at the position of the hollow ring 41, so that the fastening bolt 14 can be installed and removed from the bottom end of the hollow ring 41. The setting of multiple columns 42 and hollow rings 41 provides convenience for the installation and removal of the fastening bolt 14, facilitating the installation and removal of the non-drive end water-lubricated bearing 5. Only the top plate of the support base 4 can be set as a hollow ring 41, and the bottom plate can be a solid plate. In this embodiment, both the top plate and the bottom plate of the support base 4 are set as hollow rings 41 for the purpose of saving materials and allowing the top plate and bottom plate to be interchanged to improve convenience.

[0068] Furthermore, the present invention also provides an assembly method for a rim thruster, the assembly method being implemented based on the above-described assembly fixture for a rim thruster, the assembly method comprising:

[0069] Motor assembly: Place the chassis 1 on multiple support seats 4; insert the fastening bolts 14 into the support seats 4 and assemble the fastening bolts 14 from the bottom of the annular groove 13; install the non-drive end water-lubricated bearing 5 on the chassis 1; install the stator 7 on the non-drive end water-lubricated bearing 5.

[0070] Remove the second bolt, remove multiple positioning blocks 3 from the top plate 2, and connect the positioning blocks 3 to the inner side of the rotor yoke with the first bolt; lift the top plate 2 to the positioning blocks 3, lower the top plate 2, and slide the multiple sliding grooves 22 of the top plate 2 to the multiple positioning blocks 3 one by one until the second threaded hole 32 and the third threaded hole 221 are coaxial. Connect the multiple positioning blocks 3 to the top plate 2 with the multiple second bolts to complete the connection between the top plate 2 and the rotor 8.

[0071] Lift the top plate 2 and rotor 8, and slide the guide shaft 21 vertically into the sleeve 11 until the second end of the guide shaft 21 is engaged with the sleeve 11.

[0072] Install the water-lubricated bearing 6 at the drive end onto the stator 7;

[0073] Tooling disassembly: Remove the second bolt, disconnect the top plate 2 from the positioning block 3, and lift and dismantle the top plate 2; remove the first bolt and remove multiple positioning blocks 3; remove the fastening bolt 14 and dismantle the base plate 1.

[0074] In this embodiment, the outer diameter of the top plate 2 is not greater than the inner diameter of the rotor 8 and the inner diameter of the water-lubricated bearing 6 at the drive end, so that the top plate 2 can be disassembled after the assembly of the rim propeller is completed. At the same time, the outer diameter of the top plate 2 after it is connected to the positioning block 3, that is, the distance from the center of the top plate 2 to the outer wall of the positioning block 3, is greater than the inner diameter of the rotor 8 and the inner diameter of the water-lubricated bearing 6 at the drive end, so that the positioning block 3 can abut against the top of the inner wall of the rotor 8, thereby enabling the positioning block 3 and the top plate 2 to bear the weight of the rotor 8 and the water-lubricated bearing 6 at the drive end, reducing the shear force on the first bolt and the second bolt, avoiding bolt breakage or deformation, extending the service life of the bolt and improving the assembly accuracy.

[0075] This invention achieves high-precision assembly of the wheel flange propeller by cleverly designing the disassembly and assembly structure of the first bolt, the second bolt, and the fastening bolt 14, simplifying the assembly process. Furthermore, it enables the assembly of the water-lubricated bearings on both sides without disassembling the assembly fixture, effectively avoiding collisions during the installation of the water-lubricated bearings. It also has strong adaptability to the air gap between the stator and rotor 8 of the small-pitch permanent magnet motor.

[0076] Furthermore, the positioning block 3 and the top plate 2 connected to the positioning block 3 are numbered. In this embodiment, the positioning block 3 and the slide groove 22 connected to it are numbered the same. The numbering ensures that the relative position of the positioning block 3 and the top plate 2 is consistent each time they are assembled, thereby ensuring the alignment of the second threaded hole 32 and the third threaded hole 221. It is not necessary to rotate the top plate 2 or the rotor 8 again, which simplifies the process.

[0077] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. An assembly fixture for a rim-driven propeller, characterized in that, The assembly fixture includes: Chassis (1), on which sleeves (11) are concentrically arranged; Top plate (2), on which a guide shaft (21) is concentrically arranged, the first end of the guide shaft (21) can slide inside the sleeve (11), and the second end of the guide shaft (21) can engage with the sleeve (11); Multiple positioning blocks (3) are arranged around the axis of the top plate (2); the positioning blocks (3) are detachably connected to the side wall of the top plate (2); Multiple support bases (4), the bottom surface of the chassis (1) abuts against the top surface of the multiple support bases (4); The assembly method of the assembly fixture includes: Motor assembly: Place the chassis (1) on a plurality of the support seats (4); install the non-drive end water-lubricated bearing (5) on the chassis (1); install the stator (7) on the non-drive end water-lubricated bearing (5); Remove multiple positioning blocks (3) from the top plate (2) and connect them to the inside of the rotor yoke; lift the top plate (2) to the positioning blocks (3) and connect the multiple positioning blocks (3) to the top plate (2); Lift the top plate (2) and slide the guide shaft (21) vertically into the sleeve (11) until the second end of the guide shaft (21) engages with the sleeve (11); The water-lubricated bearing (6) at the drive end is installed on the stator (7).

2. The assembly fixture for the rim propeller according to claim 1, characterized in that, The sidewall of the top plate (2) is provided with multiple grooves (22) along its axial direction; The positioning block (3) can slide vertically within the groove (22).

3. The assembly fixture for the rim propeller according to claim 2, characterized in that, The positioning block (3) is provided with a first threaded hole (31) and a second threaded hole (32). The first threaded hole (31) includes a countersunk hole and a through hole that are connected, and the countersunk hole is located close to the guide shaft (21); The second threaded hole (32) is connected to the third threaded hole (221) opened on the slide (22); the third threaded hole (221) penetrates the side wall of the top plate (2).

4. The assembly fixture for the rim propeller according to any one of claims 1-3, characterized in that, A support platform (23) is provided between the first end of the guide shaft (21) and the second end of the guide shaft (21). The support platform (23) abuts against the top surface of the sleeve (11).

5. The assembly fixture for the rim propeller according to any one of claims 1-3, characterized in that, The guide shaft (21) passes through the top and bottom surfaces of the chassis (1); The vertical distance between the bottom surface of the guide shaft (21) and the bottom surface of the chassis (1) is less than the height of the support base (4).

6. The assembly fixture for the rim propeller according to any one of claims 1-3, characterized in that, Both the chassis (1) and the top plate (2) are provided with multiple hoisting holes (12).

7. The assembly fixture for the rim propeller according to any one of claims 1-3, characterized in that, The chassis (1) has an annular groove (13) which is connected to the side wall of the chassis (1). The annular groove (13) is perforated by a fastening bolt (14) in the vertical direction.

8. The assembly fixture for the rim propeller according to any one of claims 1-3, characterized in that, The support base (4) includes a pair of hollow rings (41) and multiple columns (42); The two ends of the column (42) are respectively connected to a pair of hollow rings (41).

9. The assembly fixture for the rim propeller according to any one of claims 1-3, characterized in that, The assembly method of the assembly fixture also includes: Tooling disassembly: disconnect the top plate (2) from the positioning block (3), and lift and dismantle the top plate (2); remove multiple positioning blocks (3); remove the base plate (1).

10. The assembly fixture for the rim propeller according to claim 9, characterized in that, The positioning block (3) and the top plate (2) connected to the positioning block (3) are numbered.

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