Combined assembling tool and motor assembling tool

Abstract

The embodiment of the utility model discloses an assembling tool and a motor assembling tool. The assembling tool comprises a machine cage, a top plate and a positioning assembly. A containing cavity with an axial opening is defined by the machine cage, and the containing cavity is used for containing workpieces. The top plate is detachably connected to the axial opening so as to limit the degree of freedom of the workpiece in the axial direction; the positioning assembly at least comprises a pressing plate; the pressing plate is movably connected with the machine cage and can stretch into or be away from the containing cavity in the radial direction so as to limit the freedom degree of the workpiece in the circumferential direction and the radial direction. According to the assembling tool, the degree of freedom of the workpiece in the axial direction, the radial direction and the circumferential direction can be limited through the cooperation of the top plate and the positioning assembly, then the positioning stability of the workpiece is improved, meanwhile, the coaxiality requirement in the workpiece assembling process can be met through the cooperation of the top plate and the positioning assembly, and the ideal assembling precision is achieved.

Description

Technical Field

[0001] This utility model relates to the field of assembly tooling technology, and in particular to an assembly tool and a motor assembly fixture. Background Technology

[0002] In the manufacturing and processing field, especially in the assembly of casing-less motors, the positioning and fixing of the stator and rotor structure is a critical step. Because casing-less motors lack an outer shell for support and fixation, the stator and rotor assemblies are prone to axial, radial, or circumferential misalignment during assembly, affecting motor performance and reliability.

[0003] Currently, traditional motor assembly fixtures mostly rely on special clamps or brackets, fixed by bolts or clips. While these can meet basic assembly requirements, they still have the following shortcomings: 1) Poor positioning stability: Existing assembly fixtures often lack effective control over radial and circumferential degrees of freedom during the fixing process, which can easily lead to displacement or tilting of the stator and rotor structure after fixing; 2) Insufficient adaptability: Different specifications and sizes of shell-less motors require different assembly fixtures, lacking versatility and increasing production costs and the complexity of fixture replacement; 3) Inconvenient operation: The assembly process is cumbersome, requiring frequent adjustments and corrections, which not only increases the difficulty of operation but also prolongs the assembly time; 4) Difficulty in precision control: Due to the high coaxiality requirements of the stator and rotor components, traditional fixtures cannot ensure the precision after assembly, affecting the stable operation of the motor.

[0004] Therefore, there is an urgent need for a new assembly tool and motor assembly fixture. Utility Model Content

[0005] The purpose of this utility model is to provide an assembly tool and a motor assembly fixture. The assembly tool, through the cooperation of the top plate and the positioning component, can restrict the workpiece's degrees of freedom in the axial, radial and circumferential directions, thereby improving the positioning stability of the workpiece. At the same time, the cooperation between the top plate and the positioning component can also meet the coaxiality requirements during the workpiece assembly process, so as to achieve ideal assembly accuracy.

[0006] This utility model embodiment discloses a packaging tool, including:

[0007] The machine cage is self-enclosed to form a receiving chamber with an axial opening, which is used to place the workpiece;

[0008] A top plate, detachably connected to an axial opening, to restrict the workpiece's axial degrees of freedom; and

[0009] Positioning components, including at least a pressure plate;

[0010] The pressure plate is movably connected to the machine cage and can extend into or away from the accommodating chamber in the radial direction to restrict the workpiece's degrees of freedom in the circumferential and radial directions.

[0011] Furthermore, the positioning assembly also includes a fixing mechanism, and the cage also has a radial through groove extending in the radial direction. The fixing mechanism is arranged in the radial through groove, and the pressure plate passes through the radial through groove in the radial direction.

[0012] The pressure plate can be fixed relative to the radial through groove through the fixing mechanism.

[0013] Furthermore, the fixing mechanism includes a cylindrical pin and an eccentric shaft, both of which are inserted into a radial through groove in a predetermined direction, and a pressure plate is arranged between the cylindrical pin and the eccentric shaft; wherein, the eccentric shaft can rotate along its own axis to abut against or separate from the pressure plate.

[0014] Furthermore, the preset direction is perpendicular to the radial direction.

[0015] Furthermore, the number of positioning components is multiple sets, and the multiple sets of positioning components are arranged on the outer circumferential direction of the cage at different circumferential positions or different axial height positions, and the pressure plate of any set of positioning components points to the central axis of the cage.

[0016] Furthermore, the pressure plate includes a body and an insert. The body has a strip-shaped structure, and the insert extends along one end of the body. The thickness of the insert is less than the thickness of the body, so as to be engaged in the small-diameter groove of the workpiece.

[0017] Furthermore, the top plate has an irregular plate structure, and its outer perimeter has several arc segments and straight segments, with the arc segments matching the axial openings.

[0018] The top plate can be fitted into the axial opening via the arc segment, and an installation gap is formed between the straight segment and the axial opening.

[0019] Furthermore, a positioning notch is provided on the arc segment, and a positioning pin that matches the positioning notch is provided on the axial opening. The positioning pin extends radially toward the central axis of the cage.

[0020] Furthermore, the top plate is also provided with a positioning hole that runs through the axial direction, and the assembly tool also includes a pin that can be inserted into the positioning hole to fix the workpiece.

[0021] Furthermore, the top plate also includes a through hole located in the middle of the top plate to form an outlet chamber communicating with the receiving chamber, through which a portion of the workpiece extends from the receiving chamber into the outlet chamber.

[0022] Furthermore, the top plate also includes multiple mounting holes, which are evenly spaced in the circumferential direction. The assembly tool also includes bolts, which can be inserted into the mounting holes to connect with the workpiece via threads.

[0023] Furthermore, the cage also includes a base, in which positioning grooves and / or positioning protrusions are arranged for interaction with the workpiece.

[0024] Furthermore, the base is also equipped with outlet holes.

[0025] This utility model embodiment further discloses a motor assembly fixture, which includes the above-mentioned assembly tool. The assembly tool is used to assemble a shell-less motor, and the workpiece is a stator and rotor structure.

[0026] The assembly tool and motor assembly fixture provided by this utility model have at least the following beneficial effects, including but not limited to:

[0027] 1) This assembly tool, through the cooperation of the top plate and the positioning component, can restrict the workpiece's degrees of freedom in the axial, radial and circumferential directions, thereby improving the positioning stability of the workpiece. At the same time, the cooperation between the top plate and the positioning component can also meet the coaxiality requirements during the workpiece assembly process, so as to achieve ideal assembly accuracy.

[0028] 2) The positioning component of the assembly tool adopts a pressure plate structure that can extend into or away from the accommodating chamber. Its extension amount is adjustable and can be flexibly adjusted according to the workpiece specifications and size. This can significantly improve the adaptability of the assembly tool, making it applicable to workpieces of different sizes, while reducing production costs and simplifying tooling changes.

[0029] 3) The assembly tool uses an eccentric shaft and a fixing pin as a fixing mechanism. The eccentric shaft only needs to rotate to complete the relative fixing of the pressure plate. It has the effect of convenient operation, simple assembly process, no need for frequent adjustment and correction, reducing the difficulty of operation and shortening the assembly time. Attached Figure Description

[0030] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0031] Figure 1 A schematic diagram of the assembly tool provided in an embodiment of this utility model;

[0032] Figure 2 Another structural schematic diagram of the assembly tool provided in this embodiment of the utility model;

[0033] Figure 3 A top view of the assembly tool provided in an embodiment of this utility model;

[0034] Figure 4 One of the schematic diagrams illustrating the engagement of the positioning components provided in this embodiment of the utility model;

[0035] Figure 5 A second schematic diagram illustrating the engagement of the positioning components provided in this embodiment of the utility model;

[0036] Figure 6 A schematic diagram of the structure of the pressure plate provided in an embodiment of this utility model;

[0037] Figure 7 A schematic diagram of the top plate provided in an embodiment of this utility model.

[0038] Icon: 100 - Assembly Tool;

[0039] 10-Cage; 101-Accommodating chamber; 102-Axial opening; 103-Radial through groove; 104-Positioning pin; 105-Base; 106-Positioning groove; 107-Positioning protrusion; 108-Outlet hole;

[0040] 11-Top plate; 111-Circular arc segment; 112-Straight line segment; 113-Installation gap; 114-Positioning notch; 115-Positioning hole; 116-Through hole; 117-Mounting hole;

[0041] 121-Pressure plate; 1211-Body part; 1212-Embedded part; 122-Cylindrical pin; 123-Eccentric shaft. Detailed Implementation

[0042] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0043] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0044] Please refer to Figures 1-7This utility model provides a assembly tool 100. The assembly tool 100 includes a cage 10, a top plate 11, and a positioning assembly. The cage 10 itself encloses a receiving chamber 101 with an axial opening 102 for placing a workpiece; the top plate 11 is detachably connected to the axial opening 102 to restrict the workpiece's axial degree of freedom; the positioning assembly includes at least a pressure plate 121; wherein the pressure plate 121 is movably connected to the cage 10 and can extend into or away from the receiving chamber 101 in the radial direction to restrict the workpiece's circumferential and radial degrees of freedom.

[0045] It should be noted that the assembly tool 100 in this embodiment can be applied to the assembly of housingless motors, and can also be applied to the assembly of other housingless workpieces, such as housingless bearing assemblies, housingless gear structures, and other housingless workpieces that require precise positioning and fixing in the axial, radial, and circumferential directions.

[0046] It should also be noted that, in this embodiment, the axial direction refers to the direction of the central axis of the cage 10, i.e., as shown in the figure. Figure 1 The vertical direction is shown. In this embodiment, the radial direction refers to... Figure 1 The extension direction of the pressure plate 121 is the direction pointing towards the central axis of the machine cage 10 in the radial plane. When the pressure plate 121 extends into the receiving chamber 101, it can abut against the outer surface of the workpiece to restrict the workpiece's degrees of freedom in the circumferential and radial directions.

[0047] It is worth noting that the assembly tool 100, through the cooperation of the top plate 11 and the positioning component, can restrict the workpiece's degrees of freedom in the axial, radial and circumferential directions, thereby improving the positioning stability of the workpiece. At the same time, the cooperation between the top plate 11 and the positioning component can also meet the coaxiality requirements during the workpiece assembly process, so as to achieve ideal assembly accuracy.

[0048] It is also worth noting that the positioning component of the assembly tool 100 adopts a pressure plate 121 structure that can extend into or away from the accommodating chamber 101. Its extension amount is adjustable and can be flexibly adjusted according to the workpiece specifications and size, thereby significantly improving the adaptability of the assembly tool 100, making it applicable to workpieces of different sizes, while reducing production costs and simplifying tooling changes.

[0049] Please refer to this again. Figure 1 and Figure 2 The positioning assembly also includes a fixing mechanism, and the cage 10 also has a radial through groove 103 extending in the radial direction. The fixing mechanism is arranged in the radial through groove 103, and the pressure plate 121 passes through the radial through groove 103 in the radial direction. The pressure plate 121 can be fixed relative to the radial through groove 103 by means of the fixing mechanism.

[0050] It is worth noting that, through the fixing mechanism, the pressure plate 121 can be firmly fixed in the radial through groove 103 in the radial direction, thereby preventing the pressure plate 121 from loosening or shifting due to vibration or external force during assembly. In addition, the fixing mechanism allows for precise control of the insertion position of the pressure plate 121, thereby ensuring more accurate positioning of the workpiece in the radial and circumferential directions and meeting the requirements of high-precision assembly.

[0051] It is also understandable that the fixing mechanism can take many forms, such as screw fixing, in which the pressure plate 121 is fixed in the radial through groove 103 by screws, which has the advantages of simple operation and reliable fixing, or spring locking, in which the spring-loaded buckle structure achieves automatic locking to meet the needs of rapid installation.

[0052] In one embodiment of this example, such as Figure 4 and Figure 5 As shown, the fixing mechanism includes a cylindrical pin 122 and an eccentric shaft 123. Both the cylindrical pin 122 and the eccentric shaft 123 are inserted into the radial through groove 103 along a predetermined direction. A pressure plate 121 is arranged between the cylindrical pin 122 and the eccentric shaft 123. The eccentric shaft 123 is capable of rotating along its own axis to abut against or separate from the pressure plate 121. It is understood that... Figure 4 The image shows the state when the pressure plate 121 is in contact with the eccentric shaft 123. Figure 5 The image shows the state when the pressure plate 121 is separated from the eccentric shaft 123.

[0053] It is worth noting that the cylindrical pin 122 provides a reference positioning, while the eccentric shaft 123 is responsible for pressing or releasing the pressure plate 121, ensuring that the pressure plate 121 remains stable in the radial through groove 103. In this fixing mechanism, the pressure plate 121 can be pressed or released simply by rotating the eccentric shaft 123, making operation simple and adjustment rapid. At the same time, the eccentric structure of the eccentric shaft 123 can achieve minute displacement adjustments, ensuring that the pressure plate 121 can accurately press the workpiece, improving assembly accuracy. Furthermore, the rotation angle of the eccentric shaft 123 can be continuously adjusted without the need for grading or preset fixed positions, thus making it more adaptable to the fixing requirements of different workpieces.

[0054] Optionally, the preset direction is perpendicular to the radial direction.

[0055] Specifically, the preset direction refers to, for example, Figure 4 and Figure 5The direction shown is from the paper surface to the outside of the paper. The preset direction is perpendicular to the radial direction, allowing the cylindrical pin 122 and eccentric shaft 123 to be installed from the paper surface to the outside of the paper. This arrangement avoids the cylindrical pin 122 and eccentric shaft 123 occupying radial space, keeping the assembly tool 100 compact overall. Simultaneously, since the cylindrical pin 122 and eccentric shaft 123 are installed vertically, the operator can directly adjust the eccentric shaft 123 from above or below without affecting the radial adjustment of the pressure plate 121, improving operational convenience. Furthermore, the cylindrical pin 122 and eccentric shaft 123 pass vertically through the radial through groove 103, ensuring stable force on the pressure plate 121 in the radial direction and preventing slippage or displacement.

[0056] Please refer to this again. Figures 1-3 The number of positioning components is multiple sets. These multiple sets of positioning components are arranged on the outer circumferential direction of the cage 10 at different circumferential positions or different axial height positions, and the pressure plate 121 of any set of positioning components points to the central axis of the cage 10.

[0057] It is worth noting that multiple positioning components are arranged along the circumference or axial direction of the cage 10, which can position and fix the workpiece from multiple directions, ensuring the stability of the workpiece in the axial, radial and circumferential directions. This allows multiple pressure plates 121 to achieve uniform clamping even if the workpiece shape is irregular or the force is uneven, thus avoiding the workpiece tilting or shifting.

[0058] It is also worth noting that, such as Figure 1 and Figure 3 As shown, there are three sets of positioning components, with two sets arranged at the same horizontal level and opposite to each other to further ensure the clamping stability of the workpiece. Simultaneously, the assembly tool 100 also has two sets of positioning components located in the same vertical plane, making it more adaptable to the clamping requirements of workpieces with special shapes, thereby increasing its applicability. Depending on the specific implementation environment, the number of positioning components can also be two, four, etc. When there are four sets of positioning components, they can be arranged in four directions to clamp the workpiece. This embodiment is merely an example illustrating the specific number and position of the positioning components and does not constitute a limitation on their specific number and position.

[0059] Please refer to this again. Figure 6 The pressure plate 121 includes a body portion 1211 and an insert portion 1212. The body portion 1211 has a strip-shaped structure. The insert portion 1212 extends along one end of the body portion 1211 and the thickness of the insert portion 1212 is less than the thickness of the body portion 1211, so as to be fitted into the small-diameter groove of the workpiece.

[0060] It is worth noting that the insert 1212 can be embedded into the workpiece groove to form a mechanical clamping structure. Even under vibration or external force, the workpiece can remain stable. This connection method is more reliable than fixing by the surface friction of the pressure plate 121 alone, as it can restrict the circumferential freedom of the workpiece, thereby further preventing the workpiece from loosening. At the same time, the main body 1211 of the pressure plate 121 has good structural strength due to its large thickness, and is not easily deformed or damaged during sliding. The insert 1212 is designed with a smaller thickness, which can better fit the small-diameter groove of the workpiece, avoiding excessive structural modifications to the workpiece due to the excessive size of the pressure plate 121, thus maintaining the original structure and functional characteristics of the workpiece and ensuring that its performance is not affected.

[0061] Please refer to this again. Figure 1 , Figure 2 and Figure 7 The top plate 11 has an irregular plate structure, and its outer periphery has several arc segments 111 and straight segments 112. The arc segments 111 are adapted to the axial opening 102. The top plate 11 can be locked into the axial opening 102 through the arc segments 111, and an installation gap 113 is formed between the straight segments 112 and the axial opening 102.

[0062] It is worth noting that the arc segment 111 of the top plate 11 is compatible with the axial opening 102, thus achieving self-locking and limiting through the arc structure, ensuring that the top plate 11 is not easily loosened or shifted after installation. Simultaneously, the installation gap 113 between the straight segment 112 and the axial opening 102 provides space for the loading and unloading of the top plate 11, allowing it to be easily inserted or removed during installation without complex operations. The combination of the arc segment 111 and the straight segment 112 ensures that the top plate 11 is securely fixed while retaining a certain adjustment margin to accommodate installation tolerances.

[0063] In this embodiment, a positioning notch 114 is also provided on the arc segment 111, and a positioning pin 104 that is compatible with the positioning notch 114 is provided on the axial opening 102. The positioning pin 104 extends radially toward the central axis of the cage 10.

[0064] Understandably, the positioning notch 114 and the positioning pin 104 work together to enable the top plate 11 to be automatically positioned during the pre-installation process, ensuring that it always maintains the correct position in the axial and radial directions, preventing the top plate 11 from rotating or shifting after assembly, and improving the overall assembly accuracy.

[0065] In this embodiment, the top plate 11 is also provided with a positioning hole 115 that extends through in the axial direction, and the assembly tool 100 also includes a pin (not shown in the figure), which can be inserted into the positioning hole 115 to fix the workpiece.

[0066] It is worth noting that the cooperation between the positioning hole 115 and the pin allows for precise angular positioning of the workpiece, improving the installation effect.

[0067] Optionally, the top plate 11 also includes a through hole 116, which is arranged in the middle of the top plate 11 to form an outlet chamber communicating with the receiving chamber 101, wherein a portion of the workpiece extends from the receiving chamber 101 into the outlet chamber.

[0068] Specifically, workpieces often have some extended structures, such as windings. In this case, by arranging through holes 116, interference with the workpiece can be reduced, allowing for smooth assembly. It can also be understood that the "exit chamber" here refers to the chamber formed by the through hole 116 itself.

[0069] In this embodiment, the top plate 11 also includes a plurality of mounting holes 117, which are evenly spaced in the top plate 11 along the circumferential direction. The assembly tool 100 also includes bolts (not shown in the figure), which can be inserted into the mounting holes 117 for threaded connection with the workpiece. It is understood that the mounting holes 117 are not only used to reserve bolt mounting areas, but also have a weight-reducing effect, so that the top plate 11 can maintain a lighter weight while providing axial limiting function, thereby facilitating position adjustment and improving the assembly efficiency of the workpiece.

[0070] In this embodiment, the cage 10 further includes a base 105, in which a positioning groove 106 and / or a positioning protrusion 107 are arranged for mutual cooperation with the workpiece.

[0071] It is worth noting that the positioning groove 106 and / or positioning protrusion 107 in this embodiment can be precision machined to adapt to the positioning requirements of the workpiece.

[0072] In this embodiment, the base 105 is also provided with an outlet hole 108. It is understood that the arrangement of the outlet hole 108 can also avoid the assembly tool 100 from interfering with the workpiece and improve the applicability to the workpiece.

[0073] In summary, the working principle of the assembly tool 100 is as follows: First, the workpiece is placed into the receiving chamber 101 of the machine cage 10. Then, the rotation of the workpiece is adjusted, and the top plate 11 is then placed on top to fix the top plate 11 relative to the workpiece, thereby restricting the workpiece's axial (height) degree of freedom. Next, a pressure plate 121 is inserted into the radial through groove 103, and the position of the pressure plate 121 is adjusted so that it abuts against the workpiece, thereby restricting the workpiece's circumferential and radial degrees of freedom.

[0074] This utility model embodiment further discloses a motor assembly fixture, which includes the aforementioned assembly tool 100. The assembly tool 100 is used to assemble a casing-less motor, and the workpiece is a stator and rotor structure. This motor assembly fixture has all the beneficial effects of the assembly tool 100.

[0075] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

[0076] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0077] Throughout this specification, references to "an embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the present invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention shown herein may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0078] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0079] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0080] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0081] The above description of the embodiments shown in this utility model (including the content in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the utility model to the precise forms disclosed herein. Although specific embodiments and examples of the utility model have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the utility model, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the utility model in accordance with the above description of the embodiments of the utility model, and such modifications will be within the spirit and scope of the utility model.

[0082] This document has generally described the systems and methods in detail to aid in understanding the present invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention can be practiced without one or more specific details, or using other devices, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

Claims

1. A packaging tool, characterized in that, include; The machine cage, by itself enclosing a receiving chamber with an axial opening, is used to place the workpiece; The top plate is detachably connected to the axial opening to restrict the workpiece's axial degree of freedom. as well as Positioning components, including at least a pressure plate; The pressure plate is movably connected to the machine cage and can extend into or away from the receiving chamber in the radial direction to restrict the workpiece's degrees of freedom in the circumferential and radial directions.

2. The assembly tool according to claim 1, characterized in that, The positioning assembly further includes a fixing mechanism, and the cage also has a radial through groove extending in the radial direction. The fixing mechanism is arranged in the radial through groove, and the pressure plate passes through the radial through groove in the radial direction. The pressure plate can be fixed relative to the radial through groove through the fixing mechanism.

3. The assembly tool according to claim 2, characterized in that, The fixing mechanism includes a cylindrical pin and an eccentric shaft. Both the cylindrical pin and the eccentric shaft are inserted into the radial through groove along a preset direction. The pressure plate is arranged between the cylindrical pin and the eccentric shaft. The eccentric shaft is rotatable along its own axis to abut against or separate from the pressure plate.

4. The assembly tool according to claim 3, characterized in that, The preset direction is perpendicular to the radial direction.

5. The assembly tool according to any one of claims 1-4, characterized in that, The number of positioning components is multiple sets, and the multiple sets of positioning components are arranged on the outer circumferential direction of the cage at different circumferential positions or different axial height positions, and the pressure plate of any set of positioning components points to the central axis of the cage.

6. The assembly tool according to any one of claims 1-4, characterized in that, The pressure plate includes a body and an embedded part. The body has a strip-shaped structure, and the embedded part extends along one end of the body. The thickness of the embedded part is less than the thickness of the body, so as to be engaged in the small-diameter groove of the workpiece.

7. The assembly tool according to claim 1, characterized in that, The top plate has an irregular plate structure, and its outer periphery has several arc segments and straight segments, the arc segments being adapted to the axial opening; The top plate can be engaged with the axial opening via the arc segment, and an installation gap is formed between the straight segment and the axial opening.

8. The assembly tool according to claim 7, characterized in that, The arc segment is also provided with a positioning notch, and the axial opening is provided with a positioning pin that is compatible with the positioning notch. The positioning pin extends radially toward the central axis of the cage.

9. The assembly tool according to claim 1, characterized in that, The top plate is also provided with a positioning hole that runs through it in the axial direction. The assembly tool also includes a pin that can be inserted into the positioning hole to fix the workpiece.

10. The assembly tool according to claim 1, characterized in that, The top plate also includes a through hole located at the center of the top plate to form an outlet chamber communicating with the receiving chamber, wherein a portion of the workpiece extends from the receiving chamber into the outlet chamber.

11. The assembly tool according to claim 1, characterized in that, The top plate also includes multiple mounting holes, which are evenly spaced in the top plate along the circumferential direction. The assembly tool also includes bolts, which can be inserted into the mounting holes to be threadedly connected to the workpiece.

12. The assembly tool according to claim 1, characterized in that, The machine cage also includes a base, in which positioning grooves and / or positioning protrusions are arranged for interaction with the workpiece.

13. The assembly tool according to claim 12, characterized in that, The base is also provided with an outlet hole.

14. A motor assembly fixture, characterized in that, The assembly tool includes any one of claims 1-13, the assembly tool being used to assemble a casingless motor, wherein the workpiece is a stator-rotor structure.

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