Outer rotor assembly tool of direct current brushless motor

Abstract

The invention discloses an outer rotor assembly tool of a direct current brushless motor, which comprises a mold frame assembly, an upper mold assembly and a lower mold assembly, and is characterized in that the lower mold assembly comprises a support column, a lower mold elastic piece and a positioning guide sleeve, and the lower mold elastic piece is connected with the bottom of the positioning guide sleeve and the mold frame assembly; the positioning guide sleeve is provided with a sleeving part, a positioning groove, a positioning hole and a sliding hole, the sleeving part is used for sleeving the shell, the positioning groove is formed in the sleeving part and used for containing the copper sleeve, the positioning hole communicates with the positioning groove and the sliding groove and used for containing the rotating shaft, and the supporting column is slidably installed in the sliding hole and used for abutting against the bottom of the rotating shaft; the upper die assembly comprises a riveting connector installed on the die frame assembly. The supporting column is slidably mounted in the sliding hole and is in abutting fit with the bottom of the rotating shaft, so that stable pressing-in of the rotating shaft is guaranteed, and the situation of pressing deviation or pressing askew is avoided; the riveting connector can accurately rivet the copper sleeve to the shell, one-time riveting is achieved, the assembling steps are greatly simplified, and the assembling efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of DC brushless motor manufacturing equipment, and particularly to an outer rotor assembly tooling for a DC brushless motor. Background Art

[0002] Due to advantages such as high efficiency and low noise, DC brushless motors are widely used in various electrical equipment. The assembly process of their outer rotors has a crucial impact on the performance and quality of the motors. Traditional outer rotor assembly methods usually include multiple steps: first, press the rotating shaft into the copper sleeve, and then rivet the copper sleeve to the housing. However, this step-by-step assembly process has many technical bottlenecks.

[0003] On the one hand, the assembly process is cumbersome and requires multiple working steps to be completed in sequence, resulting in low production efficiency. For example, the press-fitting of the rotating shaft and the copper sleeve and the riveting of the copper sleeve and the housing need to be carried out at different workstations respectively, increasing the number of equipment and personnel input. On the other hand, the concentricity requirement is extremely high during the press-fitting process. Slight deviation will affect the runout accuracy of the rotor, and further cause problems such as vibration and noise during the operation of the motor. Since the traditional process is difficult to ensure the precise concentricity of the rotating shaft, copper sleeve and housing, the defective rate remains high, seriously affecting the production yield.

[0004] In addition, the complex design of the traditional assembly tooling also increases the operation difficulty, has high requirements for the skills of workers, and further limits the space for improving production efficiency. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: to provide an outer rotor assembly tooling for a DC brushless motor to solve the problems of low production efficiency and low production yield existing in the assembly of the outer rotor of a DC brushless motor in the prior art.

[0006] To solve the above technical problem, the technical solution adopted by the present invention is: an outer rotor assembly tooling for a DC brushless motor, including a die set assembly, an upper die assembly and a lower die assembly. The upper die assembly and the lower die assembly are both installed on the die set assembly. The die set assembly is used to drive the upper die assembly and the lower die assembly to approach or separate. The lower die assembly includes a support column, a lower die elastic member and a positioning guide sleeve. The support column is installed on the die set assembly. The lower die elastic member connects the bottom of the positioning guide sleeve and the die set assembly. The positioning guide sleeve is provided with a socket portion, a positioning groove, a positioning hole and a sliding hole. The socket portion is used to socket the housing. The positioning groove is opened on the socket portion and is used to place the copper sleeve. The positioning hole communicates with the positioning groove and the sliding groove and is used to place the rotating shaft. The support column is slidably installed in the sliding hole and is used to abut against the bottom of the rotating shaft. The upper die assembly includes a riveting joint installed on the die set assembly. The riveting joint is located directly above the positioning groove and is used to rivet the copper sleeve to the housing.

[0007] The beneficial effects of the present invention are as follows: the outer rotor assembly tool of the brushless DC motor provided by the present invention effectively solves the problems of low production efficiency and low production yield existing in the traditional assembly process through the coordinated cooperation of the mold frame assembly, the upper mold assembly and the lower mold assembly. The support column, the lower mold elastic member and the positioning guide sleeve in the lower mold assembly cooperate with each other to achieve accurate and rapid assembly of the rotating shaft, the copper sleeve and the outer shell. The sleeve connection part, the positioning groove, the positioning hole and the sliding hole of the positioning guide sleeve provide precise installation positions for the outer shell, the copper sleeve and the rotating shaft respectively, ensuring the concentricity and stability of each component during the assembly process. The sliding installation of the support column in the sliding hole and the interference fit with the bottom of the rotating shaft further ensure the stable pressing of the rotating shaft, avoiding the occurrence of bias or distortion. The riveted joint of the upper mold assembly is located directly above the positioning groove, which can accurately rivet the copper sleeve to the outer shell, achieving one-time riveting completion, greatly simplifying the assembly steps and improving assembly efficiency. At the same time, this precise assembly method effectively reduces defective products caused by assembly accuracy issues, significantly improves production yield, ensures high quality and high performance of the motor after assembly, and meets the needs of modern motor production for efficient and precise assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic structural diagram of an outer rotor assembly tool for a brushless DC motor according to a first embodiment of the present invention; Figure 2 Schematic diagram of the cross-sectional structure of the outer rotor assembly tool of the brushless DC motor according to the first embodiment of the present invention; Figure 3 This is an exploded view of the outer rotor assembly tool of the brushless DC motor according to the first embodiment of the present invention.

[0009] Description of labels: 1. Base plate; 11. Guide column; 12. Upper mounting plate; 13. Steel ball guide sleeve; 14. Die frame spring; 2. Positioning guide sleeve; 21. Socket joint; 22. Positioning groove; 23. Positioning hole; 24. Sliding hole; 25. Lower die elastic part; 26. Limiting washer; 27. Lower die limit seat; 271. Lower die limit hole; 3. Riveted joint; 31. Upper die pressure part; 32. Upper die elastic part; 33. Upper die limit seat; 331. Upper die limit hole; 4. Support column; 5. Copper sleeve; 6. Housing; 7. Rotating shaft. DETAILED DESCRIPTION

[0010] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0011] Please refer to Figures 1 to 3, An external rotor assembly tooling for a DC brushless motor, comprising a die carrier assembly, an upper die assembly and a lower die assembly. The upper die assembly and the lower die assembly are both installed on the die carrier assembly. The die carrier assembly is used to drive the upper die assembly and the lower die assembly to approach or separate from each other. The lower die assembly includes a support column 4, a lower die elastic member 25 and a positioning guide sleeve 2. The support column 4 is installed on the die carrier assembly. The lower die elastic member 25 connects the bottom of the positioning guide sleeve 2 and the die carrier assembly. The positioning guide sleeve 2 is provided with a socket portion 21, a positioning groove 22, a positioning hole 23 and a sliding hole 24. The socket portion 21 is used to socket the housing 6. The positioning groove 22 is formed in the socket portion 21 and is used to place the copper sleeve 5. The positioning hole 23 communicates with the positioning groove 22 and the sliding groove and is used to place the rotating shaft 7. The support column 4 is slidably installed in the sliding hole 24 and is used to abut against the bottom of the rotating shaft 7. The upper die assembly includes a riveting joint 3 installed on the die carrier assembly. The riveting joint 3 is located directly above the positioning groove 22 and is used to rivet the copper sleeve 5 to the housing 6.

[0012] As can be seen from the above description, the beneficial effects of the present invention are as follows: Through the coordinated cooperation of the die carrier assembly, the upper die assembly and the lower die assembly, the problems of low production efficiency and low production yield existing in the traditional assembly process are effectively solved. The support column 4, the lower die elastic member 25 and the positioning guide sleeve 2 in the lower die assembly cooperate with each other to achieve the precise and rapid assembly of the rotating shaft 7, the copper sleeve 5 and the housing 6. The socket portion 21, the positioning groove 22, the positioning hole 23 and the sliding hole 24 of the positioning guide sleeve 2 respectively provide precise installation positions for the housing 6, the copper sleeve 5 and the rotating shaft 7, ensuring the concentricity and stability of each component during the assembly process. The sliding installation of the support column 4 in the sliding hole 24 and the abutting cooperation with the bottom of the rotating shaft 7 further ensure the stable pressing-in of the rotating shaft 7 and avoid the occurrence of pressing deviation or skewing. The riveting joint 3 of the upper die assembly is located directly above the positioning groove 22, which can accurately rivet the copper sleeve 5 to the housing 6, realizing one-time riveting completion, greatly simplifying the assembly steps and improving the assembly efficiency. At the same time, this precise assembly method effectively reduces the defective products caused by assembly accuracy problems, significantly improves the production yield, ensures the high quality and high performance of the motor after assembly, and meets the requirements of efficient and precise assembly in modern motor production.

[0013] Further, the lower die assembly further includes a lower die limit seat 27. The lower die limit seat 27 is installed on the die carrier assembly. The lower die limit seat 27 is provided with a lower die limit hole 271. The positioning guide sleeve 2 and the lower die elastic member 25 are both installed in the lower die limit hole 271.

[0014] As can be seen from the above description, the installation of the lower die limit seat 27 provides a stable support and limit space for the positioning guide sleeve 2 and the lower die elastic member 25. The lower die limit hole 271 integrally installs the positioning guide sleeve 2 and the lower die elastic member 25, making the overall structure of the lower die assembly more compact and stable. During the assembly process, the lower die limit seat 27 can limit the position of the positioning guide sleeve 2 to ensure that the positioning guide sleeve 2 does not shift or shake when stressed, thereby improving the repeatability accuracy of the assembly, ensuring the consistency of the assembly quality of each product, facilitating the improvement of the production yield and realizing efficient mass production.

[0015] Furthermore, a limit cushion ring 26 is also provided in the lower die limit hole 271, and the limit cushion ring 26 is used to abut against the bottom of the positioning guide sleeve 2.

[0016] As can be seen from the above description, the setting of the limit cushion ring 26 can tightly abut against the bottom of the positioning guide sleeve 2 to form a stable support surface. During the assembly process, when the positioning guide sleeve 2 moves downward, the limit cushion ring 26 can effectively limit its downward pressing stroke to prevent the positioning guide sleeve 2 from being damaged or deformed due to excessive downward pressing. At the same time, the limit cushion ring 26 can also ensure that the downward pressing position of the positioning guide sleeve 2 is accurately consistent during each assembly, ensuring the assembly dimensional accuracy of the rotating shaft 7, the copper sleeve 5, and the housing 6, further improving the stability of the product quality, reducing defective products caused by problems such as inconsistent assembly depth, and playing a positive role in improving the production yield.

[0017] Furthermore, the lower die limit seat 27 is detachably installed on the die holder assembly.

[0018] As can be seen from the above description, the lower die limit seat 27 is detachably installed, which brings great convenience to the maintenance, adjustment, and replacement of the tooling. When it is necessary to perform maintenance and repair on the lower die assembly, replace worn parts, or adjust assembly parameters, there is no need to perform complex disassembly on the entire die holder assembly. Only by disassembling the lower die limit seat 27 can the corresponding operations be quickly completed. This not only reduces the maintenance cost and repair time but also reduces the risk of accidental damage to other components that may be caused during the disassembly and assembly process, improves the maintainability and reliability of the tooling, helps to maintain the continuity and stability of the production process, and indirectly improves the production efficiency and yield.

[0019] Furthermore, the die holder assembly includes an upper mounting plate 12, guide posts 11, and a bottom plate 1. The guide posts 11 and the lower die assembly are installed on the bottom plate 1. The upper mounting plate 12 is slidably installed on the guide posts 11 and is located directly above the bottom plate 1. The upper die assembly is installed on the bottom of the upper mounting plate 12.

[0020] As described above, in the structural design of the die set assembly, through the combination of the upper mounting plate 12, the guide posts 11, and the bottom plate 1, a stable mounting foundation and precise movement guidance are provided for the upper die assembly and the lower die assembly. The guide posts 11 are installed on the bottom plate 1, and the upper mounting plate 12 is slidably installed on the guide posts 11 and is located directly above the bottom plate 1. This layout enables the upper die assembly to perform precise linear movement along the guide posts 11 under the drive of the die set assembly, ensuring the centering and parallelism of the upper die assembly and the lower die assembly during the assembly process. Precise movement guidance helps improve the assembly accuracy, avoid assembly quality problems caused by the offset or skew of the upper die assembly, thereby ensuring product quality and increasing the production yield. At the same time, the stable structure of the die set assembly can withstand various forces during the assembly process, ensure the overall rigidity and stability of the tooling, and extend the service life.

[0021] Further, a die set spring 14 is also provided on the guide post 11, and the die set spring 14 is connected to the bottom of the upper mounting plate 12.

[0022] As described above, the setting of the die set spring 14 provides elastic support and buffering for the movement of the upper mounting plate 12. During the assembly process, when the upper die assembly moves downward and contacts the lower die assembly, the die set spring 14 can absorb part of the impact energy, reduce the rigid collision between the upper die assembly and the lower die assembly, and protect the tooling components and workpieces from damage. In addition, the elastic force of the die set spring 14 can also help the upper die assembly quickly return to its original position after the assembly is completed, improving the assembly efficiency. At the same time, the setting of the die set spring 14 can also adapt to certain assembly deviations, increasing the flexibility and fault tolerance of the tooling, which helps to further increase the production yield.

[0023] Further, the upper mounting plate 12 is provided with a ball bushing 13, and the guide post 11 is slidably installed in the ball bushing 13.

[0024] As described above, the upper mounting plate 12 is provided with a ball bushing 13, enabling the guide post 11 to be slidably installed in the ball bushing 13. This structure greatly reduces the friction coefficient between the upper mounting plate 12 and the guide post 11, improving the smoothness and flexibility of the sliding of the upper die assembly. The ball bushing 13 has a high load-bearing capacity and wear resistance, which can ensure that the upper die assembly maintains precise linear movement during frequent reciprocating movements, avoiding jamming or offset phenomena. Precise sliding guidance not only helps improve the assembly accuracy but also extends the service life of the guide post 11 and the upper mounting plate 12, reducing assembly quality problems caused by component wear, thereby stabilizing the production yield and improving the production efficiency.

[0025] Further, the guide post 11 is detachably installed on the bottom plate 1.

[0026] As can be seen from the above description, the guide post 11 is detachably installed, making the structural adjustment and maintenance of the die set assembly more flexible and convenient. When the guide post 11 needs to be replaced due to wear, deformation or other problems caused by long-term use, there is no need to disassemble the entire die set assembly on a large scale. Only by disassembling the guide post 11 can the replacement operation be completed. This not only reduces the maintenance cost and repair time, but also reduces the risk of accidental damage to other components during the disassembly and assembly process. In addition, the detachable guide post 11 also facilitates the adjustment and optimization of the die set assembly. For example, replacing the guide post 11 with different specifications to adapt to different size assembly requirements improves the versatility and adaptability of the tooling, helps enterprises reduce production costs and improve production efficiency in the production of various products.

[0027] Further, the upper die assembly further includes an upper die pressing member 31 and an upper die elastic member 32. The upper die pressing member 31 is slidably installed on the riveting joint 3 and is used to abut against the outer shell 6. The upper die elastic member 32 connects the die set assembly and the top of the upper die pressing member 31.

[0028] As can be seen from the above description, the addition of the upper die pressing member 31 and the upper die elastic member 32 to the upper die assembly forms a more stable riveting system. The upper die pressing member 31 is slidably installed on the riveting joint 3 and abuts against the outer shell 6 during the riveting process, which can provide a precise pressure application point above the outer shell 6 to ensure the stability of the outer shell 6 and the accuracy of the riveting position during riveting. The upper die elastic member 32 connects the die set assembly and the top of the upper die pressing member 31, providing elastic support and buffering for the movement of the upper die pressing member 31, enabling it to automatically adjust the pressure according to the shape and position of the outer shell 6 during the riveting process, and avoiding riveting quality problems caused by excessive or insufficient pressure. This design helps to improve the riveting quality, reduce the defective rate, protect the workpiece and the tooling, extend the service life, and improve the overall production efficiency and yield.

[0029] Further, the upper die assembly further includes an upper die limit seat 33. The upper die limit seat 33 is installed on the die set assembly. The upper die limit seat 33 is provided with an upper die limit hole 331. Both the upper die pressing member 31 and the upper die elastic member 32 are installed in the lower die limit hole 271.

[0030] As can be seen from the above description, the installation of the upper die limit seat 33 provides a stable support and limit structure for the upper die pressing member 31 and the upper die elastic member 32. The upper die limit hole 331 integrally installs the upper die pressing member 31 and the upper die elastic member 32, ensuring the compactness and stability of the internal structure of the upper die assembly. During the riveting process, the upper die limit seat 33 can limit the upward and downward positions of the upper die pressing member 31, ensuring the consistency of the riveting depth and avoiding product quality problems caused by over-riveting or under-riveting. At the same time, the stable support function of the upper die limit seat 33 helps to improve the overall rigidity of the upper die assembly, enabling it to withstand greater forces without deformation or displacement during the riveting process, thereby further enhancing the stability and reliability of the riveting quality, which is of great significance for improving the production yield.

[0031] Please refer to Figures 1 to 3, Embodiment 1 of the present invention is: An outer rotor assembly tooling for a DC brushless motor, including a mold frame assembly, an upper mold assembly, and a lower mold assembly. The upper mold assembly and the lower mold assembly are both installed on the mold frame assembly. The mold frame assembly is used to drive the upper mold assembly and the lower mold assembly to approach or separate from each other. The lower mold assembly includes a support column 4, a lower mold elastic member 25, and a positioning guide sleeve 2. The support column 4 is installed on the mold frame assembly. The lower mold elastic member 25 connects the bottom of the positioning guide sleeve 2 and the mold frame assembly. The positioning guide sleeve 2 is provided with a socket portion 21, a positioning groove 22, a positioning hole 23, and a sliding hole 24. The socket portion 21 is used to socket the housing 6. The positioning groove 22 is opened on the socket portion 21 and is used to place the copper sleeve 5. The positioning hole 23 communicates with the positioning groove 22 and the sliding groove and is used to place the rotating shaft 7. The support column 4 is slidably installed in the sliding hole 24 and is used to abut against the bottom of the rotating shaft 7. The upper mold assembly includes a riveting joint 3 installed on the mold frame assembly. The riveting joint 3 is located directly above the positioning groove 22 and is used to rivet the copper sleeve 5 to the housing 6. Through the coordinated cooperation of the mold frame assembly, the upper mold assembly, and the lower mold assembly, the problems of low production efficiency and low production yield existing in the traditional assembly process are effectively solved. The support column 4, the lower mold elastic member 25, and the positioning guide sleeve 2 in the lower mold assembly cooperate with each other to achieve the precise and rapid assembly of the rotating shaft 7, the copper sleeve 5, and the housing 6. The socket portion 21, the positioning groove 22, the positioning hole 23, and the sliding hole 24 of the positioning guide sleeve 2 respectively provide precise installation positions for the housing 6, the copper sleeve 5, and the rotating shaft 7, ensuring the concentricity and stability of each component during the assembly process. The sliding installation of the support column 4 in the sliding hole 24 and the abutting cooperation with the bottom of the rotating shaft 7 further ensure the stable pressing-in of the rotating shaft 7 and avoid the occurrence of deviation or distortion during pressing. The riveting joint 3 of the upper mold assembly is located directly above the positioning groove 22, which can accurately rivet the copper sleeve 5 to the housing 6, realizing one-time riveting completion, greatly simplifying the assembly steps, and improving the assembly efficiency. At the same time, this precise assembly method effectively reduces the defective products caused by assembly accuracy problems, significantly improves the production yield, ensures the high quality and high performance of the motor after assembly, and meets the requirements of efficient and precise assembly in modern motor production.

[0032] Preferably, the lower die assembly further includes a lower die limit seat 27, which is installed on the die carrier assembly. The lower die limit seat 27 is provided with a lower die limit hole 271, and the positioning guide sleeve 2 and the lower die elastic member 25 are both installed in the lower die limit hole 271. The installation of the lower die limit seat 27 provides a stable support and limit space for the positioning guide sleeve 2 and the lower die elastic member 25. The lower die limit hole 271 integrally installs the positioning guide sleeve 2 and the lower die elastic member 25, making the overall structure of the lower die assembly more compact and stable. During the assembly process, the lower die limit seat 27 can limit the position of the positioning guide sleeve 2 to ensure that the positioning guide sleeve 2 will not shift or shake when stressed, thereby improving the repeated accuracy of assembly, ensuring the consistency of the assembly quality of each product, being beneficial to improving the production yield and realizing efficient mass production; specifically, a limit gasket ring 26 is further provided in the lower die limit hole 271, and the limit gasket ring 26 is used to abut against the bottom of the positioning guide sleeve 2. The setting of the limit gasket ring 26 can tightly abut against the bottom of the positioning guide sleeve 2 to form a stable support surface. During the assembly process, when the positioning guide sleeve 2 moves downward, the limit gasket ring 26 can effectively limit its downward pressing stroke to prevent the positioning guide sleeve 2 from being over-pressed and damaged or deformed. At the same time, the limit gasket ring 26 can also ensure that the downward pressing position of the positioning guide sleeve 2 is accurately consistent during each assembly, ensuring the assembly dimensional accuracy of the rotating shaft 7, the copper sleeve 5, and the housing 6, further improving the stability of the product quality, reducing defective products caused by problems such as inconsistent assembly depth, and playing a positive role in improving the production yield; more specifically, the lower die limit seat 27 is detachably installed on the die carrier assembly. The lower die limit seat 27 adopts a detachable installation method, which brings great convenience to the maintenance, adjustment, and replacement of the tooling. When it is necessary to maintain and repair the lower die assembly, replace worn parts, or adjust the assembly parameters, there is no need to perform complex disassembly on the entire die carrier assembly. Only by disassembling the lower die limit seat 27 can the corresponding operations be quickly completed. This not only reduces the maintenance cost and repair time but also reduces the risk of accidental damage to other components caused by the disassembly and assembly process, improves the maintainability and reliability of the tooling, helps to maintain the continuity and stability of the production process, and indirectly improves the production efficiency and yield.

[0033] In this embodiment, the mold base assembly includes an upper mounting plate 12, guide posts 11, and a bottom plate 1. The guide posts 11 and the lower mold assembly are mounted on the bottom plate 1. The upper mounting plate 12 is slidably mounted on the guide posts 11 and is located directly above the bottom plate 1. The upper mold assembly is mounted on the bottom of the upper mounting plate 12. An external pressure mechanism is connected to the upper mounting plate 12 to drive the upper mounting plate 12, thereby realizing the movement of the upper mold assembly relative to the lower mold assembly. The structural design of the mold base assembly, through the combination of the upper mounting plate 12, guide posts 11, and bottom plate 1, provides a stable mounting foundation and precise movement guidance for the upper and lower mold assemblies. The guide posts 11 are mounted on the bottom plate 1, and the upper mounting plate 12 is slidably mounted on the guide posts 11 and is located directly above the bottom plate 1. This layout enables the upper mold assembly to make precise linear motion along the guide posts 11 under the drive of the mold base assembly, ensuring the centering and parallelism of the upper and lower mold assemblies during the assembly process. The precise movement guidance helps to improve the assembly accuracy, avoid assembly quality problems caused by the offset or skew of the upper mold assembly, thereby ensuring product quality and improving the production yield. At the same time, the stable structure of the mold base assembly can withstand the action of various forces during the assembly process, ensure the overall rigidity and stability of the tooling, and extend the service life. Specifically, a mold base spring 14 is also provided on the guide posts 11. The mold base spring 14 is connected to the bottom of the upper mounting plate 12. The setting of the mold base spring 14 provides elastic support and buffering for the movement of the upper mounting plate 12. During the assembly process, when the upper mold assembly moves downward and contacts the lower mold assembly, the mold base spring 14 can absorb part of the impact energy, reduce the rigid collision between the upper and lower mold assemblies, and protect the tooling components and workpieces from damage. In addition, the elastic force of the mold base spring 14 can also help the upper mold assembly to quickly return to its original position after the assembly is completed, improving the assembly efficiency. At the same time, the setting of the mold base spring 14 can also adapt to a certain assembly deviation, increasing the flexibility and fault tolerance of the tooling, which helps to further improve the production yield. More specifically, the upper mounting plate 12 is provided with a ball bushing 13. The guide posts 11 are slidably mounted in the ball bushing 13. The ball bushing 13 enables the guide posts 11 to be slidably mounted in the ball bushing 13. This structure greatly reduces the friction coefficient between the upper mounting plate 12 and the guide posts 11, improving the smoothness and flexibility of the sliding of the upper mold assembly. The ball bushing 13 has a high load-bearing capacity and wear resistance, which can ensure that the upper mold assembly maintains precise linear motion during frequent reciprocating motion and avoid jamming or offset phenomena.Precise sliding guidance not only helps to improve the assembly accuracy, but also extends the service life of the guide posts 11 and the upper mounting plate 12, reduces the assembly quality problems caused by component wear, thereby stabilizing the production yield and improving the production efficiency; Optionally, the guide posts 11 are detachably mounted on the bottom plate 1, and the detachable connection methods include but are not limited to at least one of bolt connection, snap connection, magnetic attraction connection or pin connection; In this way, the structural adjustment and maintenance of the mold base assembly are more flexible and convenient. When the guide posts 11 need to be replaced due to wear, deformation or other problems caused by long-term use, there is no need to disassemble the entire mold base assembly on a large scale, and only the guide posts 11 need to be disassembled to complete the replacement operation. This not only reduces the maintenance cost and repair time, but also reduces the risk of accidental damage to other components that may be caused during the disassembly and assembly process. In addition, the detachable guide posts 11 also facilitate the adjustment and optimization of the mold base assembly. For example, replacing the guide posts 11 of different specifications to meet different size assembly requirements improves the versatility and adaptability of the tooling, helps enterprises reduce production costs and improve production efficiency in the production of multiple products.

[0034] Preferably, the upper die assembly further includes an upper die pressing member 31 and an upper die elastic member 32. The upper die pressing member 31 is slidably mounted on the riveting joint 3 and is used to contact the housing 6. The upper die elastic member 32 connects the die holder assembly to the top of the upper die pressing member 31. The upper die pressing member 31 is slidably mounted on the riveting joint 3 and contacts the housing 6 during the riveting process, which can provide an accurate pressure application point above the housing 6 to ensure the stability of the housing 6 and the accuracy of the riveting position during riveting. The upper die elastic member 32 connects the die holder assembly to the top of the upper die pressing member 31, providing elastic support and buffering for the movement of the upper die pressing member 31, enabling it to automatically adjust the pressure according to the shape and position of the housing 6 during the riveting process, and avoiding riveting quality problems caused by excessive or insufficient pressure. This design helps to improve the riveting quality, reduce the defective rate, protect the workpiece and the tooling at the same time, extend the service life, and improve the overall production efficiency and yield. Specifically, the upper die assembly further includes an upper die limit seat 33. The upper die limit seat 33 is mounted on the die holder assembly. The upper die limit seat 33 is provided with an upper die limit hole 331. Both the upper die pressing member 31 and the upper die elastic member 32 are mounted in the lower die limit hole 271. The upper die limit hole 331 integrally mounts the upper die pressing member 31 and the upper die elastic member 32, ensuring the compactness and stability of the internal structure of the upper die assembly. During the riveting process, the upper die limit seat 33 can limit the up and down positions of the upper die pressing member 31, ensure the consistency of the riveting depth, and avoid product quality problems caused by over-riveting or under-riveting. At the same time, the stable supporting effect of the upper die limit seat 33 helps to improve the overall rigidity of the upper die assembly, enabling it to withstand greater forces without deformation or offset during the riveting process, thereby further improving the stability and reliability of the riveting quality, which is of great significance for improving the production yield.

[0035] In summary, the outer rotor assembly tool for the brushless DC motor provided by the present invention effectively solves the problems of low production efficiency and low production yield in the traditional assembly process through the coordinated cooperation of the mold frame assembly, the upper mold assembly and the lower mold assembly. The support column, the lower mold elastic member and the positioning guide sleeve in the lower mold assembly cooperate with each other to achieve accurate and rapid assembly of the rotating shaft, the copper sleeve and the outer shell. The sleeve connection part, the positioning groove, the positioning hole and the sliding hole of the positioning guide sleeve provide precise installation positions for the outer shell, the copper sleeve and the rotating shaft respectively, ensuring the concentricity and stability of each component during the assembly process. The sliding installation of the support column in the sliding hole and the interference fit with the bottom of the rotating shaft further ensure the stable pressing of the rotating shaft, avoiding the occurrence of biased or distorted pressing. The riveted joint of the upper mold assembly is located directly above the positioning groove, which can accurately rivet the copper sleeve to the outer shell, achieving one-time riveting completion, greatly simplifying the assembly steps and improving assembly efficiency. At the same time, this precise assembly method effectively reduces defective products caused by assembly accuracy issues, significantly improves production yield, ensures high quality and high performance of the motor after assembly, and meets the needs of modern motor production for efficient and precise assembly.

[0036] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An external rotor assembly tooling for a DC brushless motor, comprising a die set assembly, an upper die assembly and a lower die assembly. The upper die assembly and the lower die assembly are both installed on the die set assembly, and the die set assembly is used to drive the upper die assembly and the lower die assembly to approach or separate from each other. It is characterized in that, The lower die assembly includes support columns, lower die elastic members, and positioning bushings. The support columns are installed on the die holder assembly. The lower die elastic members connect the bottom of the positioning bushings and the die holder assembly. The positioning bushings are provided with a socket portion, a positioning groove, a positioning hole, and a sliding hole. The socket portion is used for socketing the outer shell. The positioning groove is formed in the socket portion and is used for placing a copper sleeve. The positioning hole communicates with the positioning groove and the sliding groove and is used for placing a rotating shaft. The support columns are slidably installed in the sliding holes and are used for abutting against the bottom of the rotating shaft. The upper die assembly includes a riveting joint installed on the die holder assembly. The riveting joint is located directly above the positioning groove and is used for riveting the copper sleeve to the outer shell.

2. The external rotor assembly tooling for the DC brushless motor according to claim 1, characterized in that, The lower die assembly further includes a lower die limit seat. The lower die limit seat is installed on the die holder assembly. The lower die limit seat is provided with a lower die limit hole. The positioning bushings and the lower die elastic members are both installed in the lower die limit hole.

3. The external rotor assembly tooling for the DC brushless motor according to claim 2, characterized in that A limit gasket ring is further provided in the lower die limit hole. The limit gasket ring is used for abutting against the bottom of the positioning bushing.

4. The external rotor assembly tooling for the DC brushless motor according to claim 2, characterized in that, The lower die limit seat is detachably installed on the die holder assembly.

5. The external rotor assembly tooling for the DC brushless motor according to claim 1, characterized in that The die holder assembly includes an upper mounting plate, guide columns, and a bottom plate. The guide columns and the lower die assembly are installed on the bottom plate. The upper mounting plate is slidably installed on the guide columns and is located directly above the bottom plate. The upper die assembly is installed on the bottom of the upper mounting plate.

6. The external rotor assembly tooling for the DC brushless motor according to claim 5, characterized in that, A die holder spring is further provided on the guide columns. The die holder spring is connected to the bottom of the upper mounting plate.

7. The external rotor assembly tooling for the DC brushless motor according to claim 5, characterized in that The upper mounting plate is provided with ball bushings. The guide columns are slidably installed in the ball bushings.

8. The external rotor assembly tooling for the DC brushless motor according to claim 5, characterized in that, The guide columns are detachably installed on the bottom plate.

9. The external rotor assembly tooling for the DC brushless motor according to claim 1, characterized in that, The upper die assembly further includes an upper die pressing member and an upper die elastic member. The upper die pressing member is slidably installed on the riveting joint and is used for abutting against the outer shell. The upper die elastic member connects the die holder assembly and the top of the upper die pressing member.

10. The external rotor assembly tooling for the DC brushless motor according to claim 9, wherein The upper die assembly further includes an upper die limit seat. The upper die limit seat is installed on the die holder assembly. The upper die limit seat is provided with an upper die limit hole. The upper die pressing member and the upper die elastic member are both installed in the lower die limit hole.

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