Dual-output hollow shaft brushless energy-saving driving motor

Abstract

The invention belongs to the technical field of driving motors, and discloses a double-output hollow shaft brushless energy-saving driving motor which comprises a motor shell and a stator installed on the inner wall, a rotor penetrates through the interior of the stator, the two ends of the rotor are rotationally connected with the motor shell, a controller is installed at the upper end of the motor shell, the two ends of the rotor are connected with sleeves, and the sleeves are rotationally connected with a motor shaft. Protective covers are fixedly installed on the two sides of the motor shell, motor shafts extend out of the protective covers, dustproof filter screens are clamped and installed on the front sides and the rear sides of the protective covers, transmission discs are fixed to the inner side ends of the motor shafts, limiting grooves are formed in the outer walls of the transmission discs, and limiting rods penetrate through the outer walls of sleeves. According to the dual-output hollow shaft brushless energy-saving driving motor, the single transmission mode of a traditional motor is broken through, rotation regulation and control of the motor shafts at the two ends are achieved through the innovatively-designed transmission control structure, steering and power transmission of the motor shafts at the two ends can be independently controlled, different power transmission modes are adopted, the application field is wider, and the dual-output hollow shaft brushless energy-saving driving motor is suitable for different use scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of drive motors, and in particular to a dual-output hollow shaft brushless energy-saving drive motor. Background Art

[0002] A brushless DC motor, consisting of a motor and a driver, is a typical mechatronic product. Because it operates in an autonomous manner, it does not require a separate starting winding on the rotor, as is required for synchronous motors that start under heavy loads under variable frequency speed regulation. It also avoids oscillation and step loss under sudden load changes. The permanent magnets of small and medium-capacity brushless DC motors are currently mostly made of high-magnetic-energy-grade rare earth neodymium iron boron.

[0003] However, the existing dual-output hollow shaft brushless energy-saving drive motor still has certain problems when in use: Existing Chinese patent application number CN202210607796.1 discloses a quickly disassembled encoder brushless DC motor with an interface protection mechanism. This encoder brushless DC motor aims to address the technical issues of existing encoder brushless DC motors, where the encoder structure is often difficult to quickly disassemble and install, and the encoder lacks an interface protection structure, making it difficult to prevent dust from entering the encoder and causing damage. The encoder brushless DC motor includes a DC brushless dual-axis motor body and a first mounting block and a second mounting block movably disposed on the exterior of the DC brushless dual-axis motor body. A first base plate is fixedly mounted on the front end of the DC brushless dual-axis motor body. Although the existing dual-output-shaft brushless motor can realize bidirectional transmission, the transmission mode is relatively simple and can only realize forward transmission or reverse transmission of the dual-output shaft. The scope of application is small and the use has certain limitations.

[0004] To solve the above problems, an innovative design is carried out based on the original dual-output hollow shaft brushless energy-saving drive motor. Summary of the Invention

[0005] The purpose of the present invention is to provide a dual-output hollow shaft brushless energy-saving drive motor to solve the problem raised in the above background technology that the existing brushless motor can achieve forward and reverse transmission, but the transmission mode is single and the applicable scenarios are limited.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a dual-output hollow shaft brushless energy-saving drive motor, comprising a motor housing and a stator mounted on the inner wall, a rotor passing through the stator, and a controller mounted on the upper end of the motor housing. The two ends of the rotor are connected to the sleeve, which is rotatably connected to the motor shaft. Protective covers are fixedly installed on both sides of the motor housing. The motor shaft extends to the outside of the protective cover, and dust filters are installed on the front and back sides of the protective cover. The inner end of the motor shaft is fixed to the transmission disc, the outer wall of the transmission disc is provided with a limiting groove, the outer wall of the sleeve passes through the limiting rod, the inner end of the limiting rod is connected to the positioning rod, and the positioning rod extends into the limiting groove; A limiting collar is sleeved on the outside of the sleeve, the inner wall of the limiting collar contacts the limiting rod, and the inner wall of the limiting collar is designed to be inclined.

[0007] Preferably, the motor shaft is rotatably connected to the sleeve, and the transmission disk is arranged inside the sleeve, the limit rod is designed as a square structure, and the limit rod is slidingly connected to the sleeve, a return spring is provided on the outside of the limit rod, and the two sides of the return spring are respectively connected to the outer wall of the sleeve and the limit rod, the positioning rod is slidably connected to the limit rod, the inner end of the positioning rod is a sloped design, a positioning spring is arranged inside the limit rod, and the two ends of the positioning spring are respectively connected to the inner wall of the limit rod and the positioning rod, and the limiting grooves are distributed in a circular array.

[0008] By adopting the above technical solution, power transmission between the sleeve and the motor shaft can be realized through the transmission plate and the limit rod structure. By utilizing the cooperation of a single set of limit rods and limit grooves, one-way transmission between the sleeve and the motor shaft can be realized. When the sleeve is transmitted in the reverse direction, the inner wall of the limit groove pushes the inclined end of the limit rod to move, thereby releasing the transmission between the sleeve and the motor shaft.

[0009] Preferably, two groups of the limit rods and the return springs are provided, the limit rods and the return springs are mirror-distributed with the rotor as the center, and the two groups of limit rods are distributed on the left and right sides of the limit collar, the inner walls on both sides of the limit collar are designed with inclined surfaces, and the contact ends of the limit rods and the inner walls of the limit collar are designed with spherical shapes.

[0010] By adopting the above technical solution, the position of the limit rod and the connection relationship between the limit rod and the limit groove can be controlled through the design of the limit ring. When the limit ring slides outside the sleeve, the inclined inner wall can be used to push the limit rod to move inside the sleeve, so that the limit rod and the limit groove are engaged. When the limit ring is reset, the reset spring can push the limit rod to reset and release the connection with the limit groove.

[0011] Preferably, the outer portion of the limiting collar is rotatably connected to a transmission frame, the transmission frame is square in design, the four corners of the transmission frame are slidably connected to a sliding guide rod, and the outer end of the sliding guide rod is fixed to the inner wall of the protective cover.

[0012] By adopting the above technical solution, the transmission frame is used as a transmission structure to drive the limit collar to move. The transmission frame is rotatably connected to the limit collar, and the transmission frame can slide stably inside the protective cover by using a sliding guide rod, which can improve the stability of the limit collar when it moves and follows the rotation of the rotor.

[0013] Preferably, a movable tube is fixed at the upper end of the transmission frame, and the upper end of the movable tube extends to the outside of the protective cover. A slide groove is provided at the upper end of the protective cover, and the movable tube and the slide groove constitute a sliding structure. A dial plate is fixed at the upper end of the movable tube, and strip-shaped protrusions are distributed in an array on the upper end of the dial plate.

[0014] By adopting the above technical solution, through the cooperation of the dial plate and the movable tube, when the dial plate is toggled with the outside of the protective cover, the transmission frame and the limit collar can be driven to move synchronously, thereby controlling the transmission mode between the sleeve and the motor shaft, and the strip-shaped protrusions arranged on the surface of the dial plate can improve the anti-slip effect during toggling.

[0015] Preferably, the movable tube is internally slidably connected to a pressure rod, the lower end of the pressure rod is connected to a limit spring, and the lower end of the limit spring is fixed to the inner wall of the movable tube, the lower end of the pressure rod is connected to a positioning plate, the movable tube is designed with openings on both sides, and the positioning plate extends outside the movable tube; A positioning bar is fixed on the inner wall of the upper end of the protective cover, and a positioning groove is provided on the positioning bar. The positioning plate extends to the bottom of the positioning bar, and the upper end of the positioning plate is engaged and connected with the positioning groove.

[0016] By adopting the above technical solution, the movement of the movable tube, transmission frame and limit collar can be restricted through the cooperation of the positioning plate and the positioning groove. The limit spring can be used to push the pressure rod and the positioning plate to move upward, so that the positioning plate and the positioning groove are engaged to achieve positioning. When the position of the limit collar and the transmission rod frame needs to be adjusted, the dial plate can be moved synchronously while pressing to achieve adjustment.

[0017] Preferably, a guide hole is provided on the outer wall of the motor housing, a fin is connected inside the guide hole, a guide groove is provided at the connection between the motor housing and the protective cover, and both ends of the guide groove are connected to the inside of the protective cover and the guide hole respectively.

[0018] By adopting the above technical solution, the air can flow along the outer wall of the motor housing through the design of the guide holes, and the fins increase the contact area with the air, thereby achieving efficient heat dissipation when the motor is running.

[0019] Preferably, the inner wall of the left side protective cover is connected with a guide pipe, and the guide pipe is in conduction with the guide groove, and the inner wall of the guide pipe is provided with axial flow blades, and the axial flow blades are connected with the rotor.

[0020] By adopting the above technical solution and utilizing the cooperation between the axial flow fan blades and the guide tube, the external air can be driven through the dust filter into the protective cover during rotation, and flow through the guide groove and the guide hole inside, carrying the heat generated by the motor and flowing out to the outside, thereby achieving rapid heat dissipation.

[0021] Preferably, a guide blade is provided inside the protective cover on the right side, and the guide blade is connected to the rotor.

[0022] By adopting the above technical solution, the design of the guide fan blades can accelerate the air exchange speed inside and outside the protective cover, increase the air flow rate and further improve the heat dissipation efficiency of the motor.

[0023] Compared with the prior art, the beneficial effects of the present invention are: the dual-output hollow shaft brushless energy-saving drive motor, 1. Breaking through the single transmission mode of traditional motors, the innovatively designed transmission control structure realizes the rotation control of the motor shafts at both ends, and can independently control the steering and power transmission of the motor shafts at both ends. Different power transmission methods have a wider range of applications and are suitable for different usage scenarios. 2. To improve the operating stability and service life of the motor, this design innovatively adopts a high-efficiency air-cooling heat dissipation structure. The outer wall of the motor housing is carefully designed and opened with a guide groove. By scientifically planning the shape, size and layout of the guide groove, a unique air circulation channel is formed. When the motor is running, outside air can directly enter the guide groove. By utilizing the natural convection and forced convection effects of the air, the large amount of heat generated during the operation of the motor is quickly removed, achieving efficient heat dissipation. At the same time, it can completely isolate dust and completely prevent dust from entering the interior of the motor, effectively preventing dust accumulation from causing wear, corrosion and short-circuit risks on core components such as the rotor and stator, fundamentally ensuring the normal operation of the motor's internal precision structure and greatly improving the overall service life and reliability of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic structural diagram of the present invention from another perspective; Figure 3 Schematic diagram of the stator and rotor structure of the present invention; Figure 4 This is a schematic diagram of the overall cross-sectional structure of the present invention; Figure 5 This is a schematic diagram of the rotor and casing structure of the present invention; Figure 6 This is a schematic diagram of the structure of the limiting collar and the transmission frame of the present invention; Figure 7 This is a schematic diagram of the transmission disc and limiting groove structure of the present invention; Figure 8 This is a schematic diagram of the structure of the sliding guide rod and the pressure rod of the present invention; Figure 9 This is a schematic diagram of the positioning groove and positioning bar structure of the present invention; Figure 10 This is a schematic diagram of the transmission frame and sliding guide rod structure of the present invention; Figure 11 This is a schematic diagram of the positioning rod and positioning spring structure of the present invention; Figure 12 This is a structural diagram of embodiment 2 of the present invention; Figure 13 This is a schematic diagram of the guide hole fin structure of the present invention; Figure 14 This is a schematic diagram of the axial flow fan blade and rotor structure of the present invention; Figure 15 It is a schematic diagram of the rotor and guide blade structure of the present invention.

[0025] In the figure: 1. Motor housing; 2. Stator; 3. Rotor; 4. Controller; 5. Protective cover; 6. Sleeve; 7. Motor shaft; 8. Dust filter; 9. Transmission plate; 10. Limiting groove; 11. Limiting rod; 12. Reset spring; 13. Limiting collar; 14. Transmission frame; 15. Paddle; 16. Movable tube; 17. Positioning plate; 18. Limiting spring; 19. Positioning strip; 20. Positioning groove; 21. Guide hole; 22. Fin; 23. Guide pipe; 24. Axial fan blade; 25. Guide groove; 26. Guide fan blade; 27. Sliding guide rod; 28. Pressure rod; 29. Positioning rod; 30. Positioning spring. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] For example 1, please refer to Figure 1-11 The present invention provides a technical solution: a dual-output hollow shaft brushless energy-saving drive motor, comprising a motor housing 1 and a stator 2 mounted on the inner wall, a rotor 3 passing through the interior of the stator 2, both ends of the rotor 3 being rotatably connected to the motor housing 1, and a controller 4 being mounted on the upper end of the motor housing 1. A base is mounted on the lower end of the motor housing 1, and the motor as a whole can be mounted using bolts. The stator 2 is mounted inside the motor housing 1, while the rotor 3 is arranged in the middle of the stator 2, and both ends pass through the exterior of the motor housing 1. Both ends of the rotor 3 are mounted to the motor housing 1 through sealed bearings, maintaining stability during rotation and preventing dust from entering the interior of the motor housing 1, effectively preventing dust accumulation from causing wear, corrosion, and short-circuit risks to core components such as the rotor 3 and stator 2, fundamentally ensuring the normal operation of the motor's internal precision structure and significantly improving the overall service life and reliability of the motor.

[0028] The two ends of the rotor 3 are connected to the sleeve 6, and the sleeve 6 is rotatably connected to the motor shaft 7. Protective covers 5 are fixedly installed on both sides of the motor housing 1, and the motor shaft 7 extends to the outside of the protective cover 5. The dust filter 8 is installed on the front and rear sides of the protective cover 5; the inner end of the motor shaft 7 is fixed to the transmission disk 9, and the outer wall of the transmission disk 9 is provided with a limiting groove 10. The outer wall of the sleeve 6 passes through the limiting rod 11, and the inner end of the limiting rod 11 is connected with a positioning rod 29, and the positioning rod 29 extends inside the limiting groove 10; the motor shaft 7 is rotatably connected to the sleeve 6, and the transmission disk 9 is arranged inside the sleeve 6. The limiting rod 11 is a square structure design, and the limiting rod 11 is slidably connected to the sleeve 6. The outer sleeve of the limiting rod 11 is provided with a reset spring 12, which resets the The two sides of the positioning spring 12 are respectively connected to the outer wall of the sleeve 6 and the limiting rod 11, the positioning rod 29 is slidably connected to the limiting rod 11, the inner end of the positioning rod 29 is designed as a bevel, a positioning spring 30 is arranged inside the limiting rod 11, and the two ends of the positioning spring 30 are respectively connected to the inner wall of the limiting rod 11 and the positioning rod 29, and the limiting grooves 10 are distributed in a ring array; the limiting rod 11 and the return spring 12 are each provided with two groups, the limiting rod 11 and the return spring 12 are mirror-distributed with the rotor 3 as the center, and the two groups of limiting rods 11 are distributed on the left and right sides of the limiting collar 13, the inner walls on both sides of the limiting collar 13 are designed as a bevel, and the contact end of the limiting rod 11 with the inner wall of the limiting collar 13 is designed as a spherical shape. The two ends of the rotor 3 are connected to the two sets of motor shafts 7 through a sleeve 6. The sleeve 6 and the motor shaft 7 are rotationally connected. The limit rod 11 and the positioning rod 29 passing through the outer wall of the sleeve 6 cooperate with the transmission disc 9 to limit the relative rotation between the motor shaft 7 and the sleeve 6 to achieve power transmission. The positioning rod 29 connected to the inner side of the limit rod 11 can extend into the interior of the limit slot 10. When the sleeve 6 rotates, the positioning rod 29 and the limit rod 11 are driven to rotate accordingly. Because the inner end of the positioning rod 29 is engaged with the interior of the limit slot 10, the transmission disc 9 and the motor shaft 7 can be driven to rotate synchronously. When the rotor 3 and the sleeve 6 rotate in the opposite direction, because the inner end of the positioning rod 29 is designed with a bevel, the inner wall of the limit slot 10 can push the positioning rod 29 to retract into the interior of the limit rod 11 during reverse rotation, thereby achieving power interruption. Whether the two sets of motor shafts 7 rotate in the forward and reverse directions of the rotor 3 can be controlled according to needs to adapt to different application scenarios.

[0029] A limiting collar 13 is sleeved on the outside of the sleeve 6, and the inner wall of the limiting collar 13 contacts the limiting rod 11, and the inner wall of the limiting collar 13 is inclined; the outer side of the limiting collar 13 is rotatably connected to the transmission frame 14, and the transmission frame 14 is square in design. The four corners of the transmission frame 14 are slidably connected to the sliding guide rod 27, and the outer end of the sliding guide rod 27 is fixed to the inner wall of the protective cover 5; the upper end of the transmission frame 14 is fixed with a movable tube 16, and the upper end of the movable tube 16 extends to the outside of the protective cover 5. A slide groove is provided at the upper end of the protective cover 5, and the movable tube 16 and the slide groove constitute a sliding structure. The movable tube 16 is fixed to a paddle plate 15, with an array of strip-shaped protrusions distributed on its upper end. A pressure rod 28 is slidably connected to the interior of the movable tube 16. The lower end of the pressure rod 28 is connected to a limit spring 18, which is fixed to the inner wall of the movable tube 16. The lower end of the pressure rod 28 is connected to a positioning plate 17. The movable tube 16 is designed with openings on both sides, and the positioning plate 17 extends outside the movable tube 16. A positioning strip 19 is fixed to the inner wall of the upper end of the protective cover 5. The positioning strip 19 has a positioning groove 20. The positioning plate 17 extends below the positioning strip 19, and the upper end of the positioning plate 17 engages with the positioning groove 20. By moving the paddle plate 15, the movable tube 16, the transmission frame 14, and the limit collar 13 can be driven to move synchronously. The inner walls of the limit collar 13 are inclined, and the inner wall diameter gradually decreases towards the center. When the limiting collar 13 is pushed to move in the direction of the limiting rod 11, the inner wall of the limiting collar 13 can push the limiting rod 11 to move toward the inside of the sleeve 6, thereby extending the positioning rod 29 to the inside of the limiting groove 10. The limiting collar 13 is controlled to move in different directions and contact the limiting rods 11 at different positions, which can control the power transmission in different directions between the sleeve 6 and the motor shaft 7. When the limiting collar 13 is not in contact with the limiting rod 11, the return spring 12 can push the limiting rod 11 to move toward the outside of the sleeve 6, so that the positioning rod 29 is disengaged from the engagement with the limiting groove 10.

[0030] The limiting collar 13 and the transmission frame 14 are placed in a rotational connection to avoid motion interference when the limiting collar 13 rotates, and the transmission frame 14 is slidably connected to the sliding guide rod 27 to maintain stability during movement. In order to achieve the positioning of the limiting collar 13, a positioning structure needs to be set. The lever 28 is provided inside the movable tube 16 , and the lower end of the lever 28 is connected to the positioning plate 17 . The limit spring 18 at the lower end of the lever 28 can push the lever 28 and the positioning plate 17 to move upward, so that the positioning plate 17 is engaged with the positioning groove 20 provided at the lower end of the positioning bar 19 , thereby realizing the positioning of the structures such as the dial plate 15 , the movable tube 16 , the transmission frame 14 and the limiting collar 13 . The multiple groups of positioning grooves 20 can realize the positioning of the limiting collar 13 at different positions, so as to control the limit rods 11 at different positions to cooperate with the transmission disc 9 and change different transmission directions. When it is necessary to dial the dial plate 15 to adjust the position of the limiting collar 13 , the lever 28 can be directly pressed downward to disengage the positioning plate 17 from the engagement of the positioning groove 20 . The dial plate 15 moves to the specified position to release the lever 28 , and the positioning plate 17 is re-engaged with the positioning groove 20 to realize positioning.

[0031] For example 2, please refer to Figure 12-15 The present invention provides a technical solution: the difference between this embodiment and the second embodiment is that: this embodiment is provided with an air-cooling heat dissipation structure, which can realize air flow with the help of the rotation of the rotor 3 to achieve efficient heat dissipation, and a guide hole 21 is provided on the outer wall of the motor housing 1, and the guide hole 21 is connected to the fin 22. A guide groove 25 is provided at the connection between the motor housing 1 and the protective cover 5, and the two ends of the guide groove 25 are respectively connected to the inside of the protective cover 5 and the guide hole 21; a guide pipe 23 is connected to the inner wall of the left protective cover 5, and the guide pipe 23 is connected to the guide groove 25, and an axial flow fan blade 24 is provided on the inner wall of the guide pipe 23, and the axial flow fan blade 24 is connected to the rotor 3; a guide fan blade 26 is provided inside the right protective cover 5, and the guide fan blade 26 is connected to the rotor 3. A guide groove 25 is provided on the mounting surface between the protective cover 5 and the motor housing 1. The guide groove 25 is connected to the protective cover 5, and the diameter of the through hole at the connection between the protective cover 5 and the motor housing 1 is larger than the diameter of the rotor 3. When the rotor 3 rotates, the axial flow fan blades 24 and the guide fan blades 26 can be driven to rotate synchronously. The external air can be sucked into the protective cover 5 through the holes at the installation of the dust filter 8, and then flows through the guide groove 25 to the guide hole 21 to dissipate heat from the motor housing 1. The design of multiple groups of fins 22 increases the contact area between the motor housing 1 and the air, further improving the heat dissipation efficiency and the heat dissipation effect. The direction of air flow can be switched according to the rotation direction of the rotor 3, and the design of the guide fan blades 26 can increase the air flow rate. Although this air-cooled heat dissipation structure can improve the overall heat dissipation efficiency of the motor, it is cheaper not to set up this structure. If the motor is used in a scenario that does not require long-term or continuous work, the heat generated is low and the air-cooled heat dissipation structure can be omitted.

[0032] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it is 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 the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dual-output hollow shaft brushless energy-saving drive motor, comprising a motor housing (1) and a stator (2) mounted on the inner wall, wherein the stator (2) passes through a rotor (3), and both ends of the rotor (3) are rotatably connected to the motor housing (1), and a controller (4) is mounted on the upper end of the motor housing (1), characterized in that: The two ends of the rotor (3) are connected to sleeves (6), the sleeves (6) are rotatably connected to the motor shaft (7), protective covers (5) are fixedly installed on both sides of the motor housing (1), the motor shaft (7) extends to the outside of the protective cover (5), and dust filters (8) are clamped and installed on the front and rear sides of the protective cover (5); The inner end of the motor shaft (7) is fixed to a transmission disc (9), an outer wall of the transmission disc (9) is provided with a limiting groove (10), an outer wall of the sleeve (6) passes through a limiting rod (11), an inner end of the limiting rod (11) is connected to a positioning rod (29), and the positioning rod (29) extends into the inner side of the limiting groove (10); The outer portion of the sleeve (6) is provided with a limiting collar (13), the inner wall of the limiting collar (13) is in contact with the limiting rod (11), and the inner wall of the limiting collar (13) is designed to be inclined.

2. The dual-output hollow shaft brushless energy-saving drive motor according to claim 1, characterized in that: The motor shaft (7) is rotatably connected to the sleeve (6), and the transmission disc (9) is arranged inside the sleeve (6). The limiting rod (11) is designed as a square structure, and the limiting rod (11) is slidably connected to the sleeve (6). A reset spring (12) is sleeved on the outside of the limiting rod (11), and both sides of the reset spring (12) are respectively connected to the outer wall of the sleeve (6) and the limiting rod (11). The positioning rod (29) is slidably connected to the limiting rod (11), and the inner end of the positioning rod (29) is designed as an inclined surface. A positioning spring (30) is arranged inside the limiting rod (11), and both ends of the positioning spring (30) are respectively connected to the inner wall of the limiting rod (11) and the positioning rod (29). The limiting grooves (10) are distributed in a ring array.

3. The dual-output hollow shaft brushless energy-saving drive motor according to claim 2, characterized in that: The limiting rod (11) and the return spring (12) are both provided in two groups. The limiting rod (11) and the return spring (12) are distributed in a mirror image with the rotor (3) as the center, and the two groups of limiting rods (11) are distributed on the left and right sides of the limiting collar (13). The inner walls on both sides of the limiting collar (13) are designed in an inclined surface, and the contact end of the limiting rod (11) and the inner wall of the limiting collar (13) is designed in a spherical shape.

4. The dual-output hollow shaft brushless energy-saving drive motor according to claim 1, characterized in that: The limiting collar (13) is externally rotatably connected to a transmission frame (14), which is square in design. The four corners of the transmission frame (14) are slidably connected to a sliding guide rod (27), and the outer end of the sliding guide rod (27) is fixed to the inner wall of the protective cover (5).

5. The dual-output hollow shaft brushless energy-saving drive motor according to claim 4, characterized in that: A movable tube (16) is fixed at the upper end of the transmission frame (14), and the upper end of the movable tube (16) extends to the outside of the protective cover (5). A slide groove is provided at the upper end of the protective cover (5), and the movable tube (16) and the slide groove form a sliding structure. A shift plate (15) is fixed at the upper end of the movable tube (16), and an array of strip-shaped protrusions are distributed on the upper end of the shift plate (15).

6. The dual-output hollow shaft brushless energy-saving drive motor according to claim 5, characterized in that: The movable tube (16) is internally slidably connected to a pressure rod (28), the lower end of the pressure rod (28) is connected to a limit spring (18), and the lower end of the limit spring (18) is fixed to the inner wall of the movable tube (16), the lower end of the pressure rod (28) is connected to a positioning plate (17), the movable tube (16) is designed with openings on both sides, and the positioning plate (17) extends outside the movable tube (16); A positioning strip (19) is fixed on the inner wall of the upper end of the protective cover (5), and a positioning groove (20) is provided on the positioning strip (19). The positioning plate (17) extends below the positioning strip (19), and the upper end of the positioning plate (17) is engaged with the positioning groove (20).

7. The dual-output hollow shaft brushless energy-saving drive motor according to claim 1, characterized in that: A guide hole (21) is provided on the outer wall of the motor housing (1), and a fin (22) is connected to the inside of the guide hole (21). A guide groove (25) is provided at the connection between the motor housing (1) and the protective cover (5), and two ends of the guide groove (25) are respectively connected to the inside of the protective cover (5) and the guide hole (21).

8. The dual-output hollow shaft brushless energy-saving drive motor according to claim 7, characterized in that: The inner wall of the left protective cover (5) is connected to a flow guide pipe (23), and the flow guide pipe (23) is connected to the flow guide groove (25). Axial flow blades (24) are provided on the inner wall of the flow guide pipe (23), and the axial flow blades (24) are connected to the rotor (3).

9. The dual-output hollow shaft brushless energy-saving drive motor according to claim 7, characterized in that: A guide blade (26) is provided inside the protective cover (5) on the right side, and the guide blade (26) is connected to the rotor (3).

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