A brushless direct current motor rotor assembly

Abstract

The utility model discloses a brushless direct current motor rotor subassembly, including rotor subassembly, convenient installation mechanism, fixed establishment and jointing auxiliary mechanism, the convenient installation mechanism includes linkage axle and installation platform, the fixed establishment includes the friction frame and the jointing rod, the jointing auxiliary mechanism includes the guide block and the two -way spring pole, and the convenient installation mechanism passes through the combination design of linkage axle and installation platform, has simplified the installation process of rotor subassembly, and the sliding fit of guide bush and linkage rod has provided accurate centering positioning function, and the fixed establishment adopts the innovative combination of friction frame and jointing rod, has realized the firm locking between parts, and the friction jointing groove of parallel setting in groups cooperates with the matched pair horizontal rod, has increased the friction point, has improved the connection stability, and the jointing auxiliary mechanism utilizes the precision fit of guide block and two -way spring pole, has realized the accurate positioning control of vertical pressure cover.

Description

Technical Field

[0001] This utility model relates to the field of rotor technology, and more specifically, to a brushless DC motor rotor assembly. Background Technology

[0002] In the structure of a brushless DC motor, the rotor assembly is the core component for realizing the electromagnetic energy conversion of the motor, and its performance directly affects the overall operating efficiency and stability of the machine. In existing brushless DC motor rotor assembly designs, the rotor typically transmits rotational motion to the load system via a drive shaft (or main shaft). However, under current technological conditions, the installation and disassembly of the rotor and drive shaft often present inconveniences.

[0003] Existing methods for connecting the rotor and the linkage shaft mainly employ tight fit, key connection, sleeve press fitting, or threaded locking. While these methods ensure transmission reliability, they require high assembly precision and significant installation force in practice. Installation necessitates specialized press fitting equipment or tools, involving numerous steps and significant time consumption. When the motor malfunctions during use, or when maintenance, rotor replacement, or linkage shaft replacement is required, existing connection methods often lead to difficult disassembly. Due to the tight connection between the rotor and linkage shaft, disassembly requires external pulling force and the use of pullers, specialized disassembly frames, and other tools. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] In view of the problems existing in the prior art, this utility model provides a brushless DC motor rotor assembly to solve the technical problems mentioned in the background art, such as the inconvenience of installing and disassembling the rotor and the linkage shaft.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a brushless DC motor rotor assembly, comprising a rotor assembly, a convenient installation mechanism, a fixing mechanism, and a snap-fit ​​auxiliary mechanism. The convenient installation mechanism includes a linkage shaft and a mounting platform. A guide sleeve is installed at one end of the rotor assembly, and a linkage rod is slidably disposed within the guide sleeve. The mounting platform is installed at one end of the guide sleeve, and a snap-fit ​​tube is installed on the mounting platform. The fixing mechanism includes a friction frame and a snap-fit ​​rod. One end of the snap-fit ​​rod can slidably extend into the snap-fit ​​tube. A friction groove is formed on the outer wall of the snap-fit ​​rod. A transverse rod is slidably installed on the outer wall of the snap-fit ​​tube. Multiple transverse rods are arranged in pairs. The friction frame is installed between the pairs of transverse rods. A pull-out spring is installed between the side wall of the snap-fit ​​rod and the inner wall of the snap-fit ​​tube. A longitudinal pressure sleeve is slidably installed on the outer wall of the snap-fit ​​tube. A release groove is formed on the inner wall of the longitudinal pressure sleeve. The longitudinal pressure sleeve presses against the transverse rod, causing the friction frame to extend into the friction groove.

[0008] The present invention is further configured such that the snap-fit ​​auxiliary mechanism includes guide blocks and bidirectional spring rods. Multiple sets of guide blocks are fixedly installed on the top end of the longitudinal pressure sleeve. Bidirectional spring rods are installed on the guide blocks. A guide groove is opened on the outer wall of the snap-fit ​​tube. The guide blocks are longitudinally slidably arranged in the guide groove. Positioning holes are symmetrically opened on the guide groove.

[0009] The present invention is further configured such that multiple sets of positioning holes are provided, and bidirectional spring rods extend into the positioning holes in stages, so that the guide block and longitudinal pressure can slide stably in the longitudinal direction. Multiple sets of positioning holes are symmetrically opened on the guide groove, which cooperate with the bidirectional spring rods to achieve precise positioning in stages.

[0010] The present invention is further configured such that a connecting plate is installed at the bottom end of the side wall of the card tube, and the connecting plate is fixedly installed on the mounting platform. The connecting plate is installed at the bottom end of the side wall of the card tube, which fixes the card tube to the mounting platform and enhances the structural stability.

[0011] The present invention is further configured such that an end block is installed at one end of the snap-fit ​​rod, and one end of the snap-fit ​​rod can extend through the guide sleeve, the mounting platform and the linkage rod to engage with the snap-fit ​​tube. The end block is installed at one end of the snap-fit ​​rod, which facilitates manual operation and improves the human-computer interaction experience.

[0012] The present invention is further configured such that multiple sets of friction grooves are provided, and the friction grooves are arranged in parallel. The multiple sets of friction grooves are arranged in parallel on the outer wall of the connecting rod to increase the friction points and improve the connection firmness.

[0013] The present invention is further configured such that the longitudinal pressure sleeve moves longitudinally to align the release groove with the transverse rod, and the pull-out spring pushes the transverse rod outward. The release groove is opened on the inner wall of the longitudinal pressure sleeve and cooperates with the transverse rod to realize the unlocking function.

[0014] The present invention is further configured such that the linkage shaft is connected to an external device, the rotation of the rotor assembly drives the rotation of the linkage shaft, the linkage shaft is connected to the external device to realize power transmission, and the rotation of the rotor assembly drives the linkage shaft to rotate synchronously.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the present invention provides a brushless DC motor rotor assembly, which has the following advantages:

[0017] This utility model features a convenient installation mechanism. Through the combined design of the linkage shaft and the mounting platform, the installation process of the rotor assembly is simplified. The sliding fit between the guide sleeve and the linkage rod provides a precise centering and positioning function, ensuring installation accuracy. The mounting platform provides stable support for the clamping pipe, while the connection between the linkage shaft and external equipment enables efficient power transmission, greatly improving installation efficiency, reducing installation errors, and ensuring a reliable connection between the rotor assembly and external equipment.

[0018] This utility model features a fixing mechanism that employs an innovative combination of a friction frame and a locking rod to achieve a secure lock between components. Multiple sets of parallel friction slots, in conjunction with paired transverse rods, increase friction points and improve connection stability. The design of the longitudinal pressure sleeve and the release groove simplifies locking and unlocking operations. The elastic support provided by the pull-out spring ensures automatic return during disassembly. This not only enhances structural stability but also simplifies the maintenance process and extends the service life of the equipment.

[0019] This invention features a locking auxiliary mechanism. This mechanism utilizes the precise cooperation of a guide block and a bidirectional spring rod to achieve accurate positioning control of the longitudinal pressure sleeve. The longitudinal sliding of the guide block within the guide groove, in conjunction with multiple symmetrically opened positioning holes, enables the bidirectional spring rod to achieve precise positioning step by step. This ensures high-precision control of the longitudinal pressure sleeve's position, enhances the reliability of the locking system, effectively prevents loosening and displacement during operation, and improves the stability and safety of the entire rotor assembly under high-speed operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the device in the unused state of this utility model;

[0021] Figure 2 This is a schematic diagram of the overall structure of the device in its unused state from different perspectives in this utility model;

[0022] Figure 3 This is a structural schematic diagram of the connection method between the linkage shaft and the rotor assembly in this utility model;

[0023] Figure 4 This is a schematic diagram of the fixing mechanism and the snap-fit ​​auxiliary mechanism in this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the fixing mechanism and the snap-fit ​​auxiliary mechanism in this utility model.

[0025] In the diagram: 1. Rotor assembly; 2. Linkage shaft; 3. Mounting platform; 4. Guide sleeve; 5. Clamping tube; 6. Friction frame; 7. Clamping rod; 8. Friction groove; 9. Transverse rod; 10. Pull-out spring; 11. Longitudinal pressure sleeve; 12. Release groove; 13. Guide block; 14. Double-acting spring rod; 15. Guide groove; 16. Positioning hole; 17. Connecting plate; 18. End block. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0029] Please see Figures 1-5 A brushless DC motor rotor assembly includes a rotor assembly 1, a convenient installation mechanism, a fixing mechanism, and a snap-fit ​​auxiliary mechanism. The convenient installation mechanism includes a linkage shaft 2 and a mounting platform 3. A guide sleeve 4 is installed at one end of the rotor assembly 1, and a linkage rod is slidably disposed within the guide sleeve 4. The mounting platform 3 is installed at one end of the guide sleeve 4, and a snap-fit ​​tube 5 is installed on the mounting platform 3. The fixing mechanism includes a friction frame 6 and a snap-fit ​​rod 7. One end of the snap-fit ​​rod 7 can slide into the snap-fit ​​tube 5. A friction groove 8 is formed on the outer wall of the snap-fit ​​rod 7. A transverse rod 9 is slidably installed on the outer wall of the snap-fit ​​tube 5. The transverse rods 9 are arranged in pairs. The friction frame 6 is installed between the pairs of transverse rods 9. A pull-out spring 10 is installed between the side wall of the snap-fit ​​rod 7 and the inner wall of the snap-fit ​​tube 5. A longitudinal pressure sleeve 11 is slidably installed on the outer wall of the snap-fit ​​tube 5. A release groove 12 is formed on the inner wall of the longitudinal pressure sleeve 11. The longitudinal pressure sleeve 11 presses against the transverse rod 9, causing the friction frame 6 to extend into the friction groove 8.

[0030] In this embodiment, the convenient installation mechanism enables the rapid installation of the rotor assembly 1 through the linkage shaft 2 and the mounting platform 3. During operation, the guide sleeve 4 at one end of the rotor assembly 1 slides with the linkage rod to provide centering and positioning. The mounting platform 3 is fixed at one end of the guide sleeve 4, providing a stable support platform for the clamping tube 5. The linkage shaft 2 connects to external equipment. When the rotor assembly 1 rotates, it drives the linkage shaft 2 to rotate synchronously, realizing power transmission, simplifying the installation process, and ensuring the correct connection between the rotor assembly 1 and the external equipment. The fixing mechanism achieves reliable fixing between components through the friction frame 6 and the clamping rod 7. During operation, the clamping rod 7 passes through the guide sleeve 4, the mounting platform 3, and the linkage rod, with one end extending into the clamping tube 5. Multiple sets of parallel friction grooves 8 on the outer wall of the clamping rod 7 cooperate with the transverse rods 9 on the side wall of the clamping tube 5. The longitudinal pressure sleeve 11 moves down and presses against the transverse rods 9, causing the friction frame 6 between the pairs of transverse rods 9 to extend into the friction grooves 8, forming a stable locking state. The pull-out spring 10 between the side wall of the clamping rod 7 and the inner wall of the clamping tube 5 provides elastic support, ensuring that the clamping rod 7 can automatically return to its original position when disassembled.

[0031] The snap-fit ​​auxiliary mechanism includes guide blocks 13 and bidirectional spring rods 14. Multiple sets of guide blocks 13 are fixedly installed on the top end of the longitudinal pressure sleeve 11. Bidirectional spring rods 14 are installed on the guide blocks 13. A guide groove 15 is opened on the outer wall of the snap-fit ​​tube 5. The guide blocks 13 are longitudinally slidable in the guide groove 15. Positioning holes 16 are symmetrically opened on the guide groove 15.

[0032] In this embodiment, the locking auxiliary mechanism achieves precise positioning control through guide blocks 13 and bidirectional spring rods 14. During operation, multiple sets of guide blocks 13 fixed to the top of the longitudinal pressure sleeve 11 slide longitudinally within the guide grooves 15 on the outer wall of the locking tube 5. The bidirectional spring rods 14 extend into multiple sets of symmetrically opened positioning holes 16 in the guide grooves 15 step by step, providing segmented positioning function to ensure that the longitudinal pressure sleeve 11 can move stably longitudinally, maintain precise position during locking and unlocking, and avoid accidental loosening.

[0033] Please see Figures 1-5 As a supplementary embodiment of a brushless DC motor rotor assembly with a convenient installation mechanism, fixing mechanism, and snap-fit ​​auxiliary mechanism: multiple sets of positioning holes 16 are provided, and bidirectional spring rods 14 extend into the positioning holes 16 in stages, so that the guide block 13 and the longitudinal pressure are stable in longitudinal sliding. A connecting plate 17 is installed at the bottom end of the side wall of the snap-fit ​​tube 5, and the connecting plate 17 is fixedly installed on the mounting platform 3. An end block 18 is installed at one end of the snap-fit ​​rod 7, and one end of the snap-fit ​​rod 7 can extend through the guide sleeve 4, the mounting platform 3, and the linkage rod to engage with the snap-fit ​​tube 5. Multiple sets of friction slots 8 are provided, and the friction slots 8 are arranged in parallel. The longitudinal pressure sleeve 11 moves longitudinally, so that the release groove 12 aligns with the transverse rod 9. The pull-out spring 10 pushes the transverse rod 9 outward. The linkage shaft 2 is connected to external equipment, and the rotation of the rotor assembly 1 drives the rotation of the linkage shaft 2.

[0034] More specifically, the rotor assembly 1 slides with the linkage rod via the guide sleeve 4. The mounting platform 3 provides support and a fixed platform for the locking tube 5. The locking rod 7 passes through the guide sleeve 4, the mounting platform 3, and the linkage rod. The end block 18 facilitates operation. The locking rod 7 extends into the locking tube 5. The longitudinal pressure sleeve 11 moves down and presses against the transverse rod 9. The friction frame 6 extends into the friction groove 8 on the outer wall of the locking rod 7. The bidirectional spring rod 14 is embedded in the positioning hole 16 to ensure that the longitudinal pressure sleeve 11 is fixed in position. The rotation of the rotor assembly 1 drives the linkage shaft 2 to rotate. The fixing mechanism and the locking auxiliary mechanism remain locked. The pull-out spring 10 provides elastic support and absorbs running vibration. The longitudinal pressure sleeve 11 moves up so that the release groove 12 aligns with the transverse rod 9. The pull-out spring 10 pushes the transverse rod 9 outward. The friction frame 6 exits the friction groove 8. The pull-out spring 10 pushes the locking rod 7 back to its original position. The locking rod 7 is pulled out of the locking tube 5, completing the unlocking.

[0035] In summary, during the use or operation of the overall equipment: when the convenient installation mechanism is required, the convenient installation mechanism enables the rapid installation of the rotor assembly 1 through the linkage shaft 2 and the mounting platform 3. During operation, the guide sleeve 4 at one end of the rotor assembly 1 slides with the linkage rod to provide centering and positioning. The mounting platform 3 is fixed at one end of the guide sleeve 4 to provide a stable support platform for the clamping pipe 5. The linkage shaft 2 is connected to external equipment. When the rotor assembly 1 rotates, it drives the linkage shaft 2 to rotate synchronously, realizing power transmission, simplifying the installation process, and ensuring the correct connection between the rotor assembly 1 and the external equipment.

[0036] When the fixing mechanism is required to operate, the fixing mechanism achieves reliable fixing between components through the friction frame 6 and the locking rod 7. During operation, the locking rod 7 passes through the guide sleeve 4, the mounting platform 3 and the linkage rod, with one end extending into the locking tube 5. The multiple sets of parallel friction grooves 8 on the outer wall of the locking rod 7 cooperate with the transverse rods 9 on the side wall of the locking tube 5. The longitudinal pressure sleeve 11 moves down and presses against the transverse rods 9, so that the friction frame 6 between the pairs of transverse rods 9 extends into the friction grooves 8, forming a stable locking state. The pull-out spring 10 between the side wall of the locking rod 7 and the inner wall of the locking tube 5 provides elastic support to ensure that the locking rod 7 can automatically return to its original position when disassembled.

[0037] When the locking auxiliary mechanism is in operation, it achieves precise positioning control through guide blocks 13 and bidirectional spring rods 14. During operation, multiple sets of guide blocks 13 fixed to the top of the longitudinal pressure sleeve 11 slide longitudinally in the guide grooves 15 on the outer wall of the locking tube 5. The bidirectional spring rods 14 extend into multiple sets of symmetrically opened positioning holes 16 in the guide grooves 15 step by step, providing segmented positioning function to ensure that the longitudinal pressure sleeve 11 can move stably longitudinally, maintain precise position during locking and unlocking, and avoid accidental loosening.

[0038] The rotor assembly 1 slides with the linkage rod via the guide sleeve 4. The mounting platform 3 provides support and a fixed platform for the locking tube 5. The locking rod 7 passes through the guide sleeve 4, the mounting platform 3, and the linkage rod. The end block 18 facilitates operation. The locking rod 7 extends into the locking tube 5. The longitudinal pressure sleeve 11 moves down and presses against the transverse rod 9. The friction frame 6 extends into the friction groove 8 on the outer wall of the locking rod 7. The bidirectional spring rod 14 is embedded in the positioning hole 16 to ensure that the longitudinal pressure sleeve 11 is fixed in position. The rotor assembly 1 rotates, driving the linkage shaft 2 to rotate. The fixing mechanism and the locking auxiliary mechanism remain locked. The pull-out spring 10 provides elastic support and absorbs running vibration. The longitudinal pressure sleeve 11 moves up, aligning the release groove 12 with the transverse rod 9. The pull-out spring 10 pushes the transverse rod 9 outward. The friction frame 6 exits the friction groove 8. The pull-out spring 10 pushes the locking rod 7 back to its original position. The locking rod 7 is pulled out of the locking tube 5, completing the unlocking.

[0039] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

[0040] In all the solutions mentioned above, those involving the operation of electrical components, unless otherwise explicitly described, are controlled by a controller. Since the devices matched with the controllers are common devices, their control principles and circuit connections are existing, well-known, and mature technologies, and their specific circuit structures will not be elaborated here. In all the solutions mentioned above, those involving motors can be used with a reducer if necessary. The connection structure and working principle between the motor and the reducer are existing, well-known technologies, and will not be elaborated here.

Claims

1. A brushless DC motor rotor assembly, comprising a rotor assembly (1), a convenient installation mechanism, a fixing mechanism, and a snap-fit ​​auxiliary mechanism, characterized in that: The convenient installation mechanism includes a linkage shaft (2) and a mounting platform (3). A guide sleeve (4) is installed at one end of the rotor assembly (1). The linkage rod is slidably disposed within the guide sleeve (4). The mounting platform (3) is installed at one end of the guide sleeve (4). A retaining tube (5) is installed on the mounting platform (3). The fixing mechanism includes a friction frame (6) and a retaining rod (7). One end of the retaining rod (7) can slide into the retaining tube (5). A friction groove (8) is provided on the outer wall of the retaining rod (7). The retaining tube (5) has a friction groove (8). A transverse rod (9) is slidably installed on the outer wall. The transverse rods (9) are arranged in pairs. The friction frame (6) is installed between the pairs of transverse rods (9). A pull-out spring (10) is installed between the side wall of the snap-fit ​​rod (7) and the inner wall of the snap-fit ​​tube (5). A longitudinal pressure sleeve (11) is slidably installed on the outer wall of the snap-fit ​​tube (5). A release groove (12) is opened on the inner wall of the longitudinal pressure sleeve (11). The longitudinal pressure sleeve (11) presses against the transverse rod (9) so that the friction frame (6) extends into the friction snap-fit ​​groove (8).

2. The brushless DC motor rotor assembly according to claim 1, characterized in that: The snap-fit ​​auxiliary mechanism includes a guide block (13) and a bidirectional spring rod (14). Multiple sets of guide blocks (13) are fixedly installed on the top end of the longitudinal pressure sleeve (11). The bidirectional spring rod (14) is installed on the guide block (13). A guide groove (15) is opened on the outer wall of the snap-fit ​​tube (5). The guide block (13) slides longitudinally in the guide groove (15). Positioning holes (16) are symmetrically opened on the guide groove (15).

3. The brushless DC motor rotor assembly according to claim 2, characterized in that: The positioning hole (16) is provided in multiple sets, and the bidirectional spring rod (14) extends into the positioning hole (16) step by step, so that the guide block (13) and the longitudinal pressure can slide in a stable longitudinal direction.

4. The brushless DC motor rotor assembly according to claim 1, characterized in that: A connecting plate (17) is installed at the bottom of the side wall of the card tube (5), and the connecting plate (17) is fixedly installed on the mounting platform (3).

5. A brushless DC motor rotor assembly according to claim 1, characterized in that: One end of the snap-fit ​​rod (7) is equipped with an end block (18), and one end of the snap-fit ​​rod (7) can extend through the guide sleeve (4), the mounting platform (3) and the linkage rod to engage with the snap-fit ​​tube (5).

6. The brushless DC motor rotor assembly according to claim 1, characterized in that: The friction slots (8) are provided in multiple sets, and the friction slots (8) are arranged in parallel.

7. A brushless DC motor rotor assembly according to claim 1, characterized in that: The longitudinal pressure sleeve (11) moves longitudinally, so that the release groove (12) aligns with the transverse rod (9), and the pull-out spring (10) pushes the transverse rod (9) outward.

8. A brushless DC motor rotor assembly according to claim 1, characterized in that: The linkage shaft (2) is connected to external equipment, and the rotation of the rotor assembly (1) drives the rotation of the linkage shaft (2).

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