Dual-mode switching bidirectional motor
By designing a turntable, a pressure plate, a separation component, and a one-way backstop, the problem of bidirectional motors failing to maintain unidirectional motion after power failure is solved. This enables the motor to automatically switch to unidirectional working mode after power failure, thus improving the motor's applicability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-03-27
AI Technical Summary
Existing bidirectional motors cannot continue to work after a power outage, failing to meet the equipment requirements that need to maintain a specific direction of motion after a power outage. Unidirectional motors, on the other hand, have difficulty automatically switching to a specific unidirectional motion mode after a power outage.
The design employs a turntable, pressure plate, separation assembly, and one-way backstop. Through the cooperation of electromagnetic coils and springs, the motor can rotate bidirectionally when powered on and automatically switch to one-way rotation when powered off.
This technology enables the motor to automatically switch to a unidirectional working mode after a power outage, meeting the requirement for the equipment to maintain a specific direction of motion after a power outage, and improving the reliability and applicability of the motor.
Smart Images
Figure CN121749618A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of electric machines, in particular to a dual-mode switching bidirectional motor. BACKGROUND
[0002] At present, in the traditional brushless DC motor, bidirectional motor is widely used in various mechanical equipment, and can realize forward and reverse rotation by changing the current direction or power phase sequence. However, the existing bidirectional motor lacks effective control means in the running state after power failure. Some traditional bidirectional motors cannot continue to work after power failure, which has limitations in some scenarios that require continuous operation of the motor, such as some devices that require power failure to maintain a specific motion direction to complete a specific task. Unidirectional motor has simple structure, but is widely used in household appliances, power tools and other fields, but usually only realizes unidirectional operation. Even if some unidirectional motors can realize forward and reverse rotation by setting, it is also difficult to automatically switch to a specific unidirectional motion mode after power failure. SUMMARY
[0003] Therefore, the present application provides a dual-mode switching bidirectional motor, which solves the problems in the prior art and enables the motor to work bidirectionally under normal circumstances and automatically switch to unidirectional working mode when power failure occurs.
[0004] The dual-mode switching bidirectional motor provided by the present application adopts the following technical scheme: A dual-mode switching bidirectional motor, comprising a housing, a rotor assembly and an output shaft, the rotor assembly and the output shaft being fixedly connected, further comprising a rotating disc, a compression disc, a separation assembly and a one-way check valve; The rotating disc is fixedly connected with the rotor assembly, the compression disc is arranged around the outer periphery of the output shaft, the compression disc is used to press against the rotating disc when the dual-mode switching bidirectional motor is powered off, the separation assembly is installed on the housing, the separation assembly is used to drive the compression disc away from the rotating disc when the dual-mode switching bidirectional motor is powered on, and the one-way check valve is installed on the housing, and the inner ring of the one-way check valve is connected with the compression disc.
[0005] Optionally, the side surface of the rotating disc facing the compression disc is provided with a friction material layer.
[0006] Optionally, the material of the friction material layer is resin-based friction material, powder metallurgy friction material, ceramic-based friction material or carbon fiber friction material.
[0007] Optionally, the separation assembly comprises a mounting seat and an electromagnetic coil, the mounting seat is arranged around the outer periphery of the output shaft, the electromagnetic coil is installed on the mounting seat, the electromagnetic coil is electrically connected with the power supply connection end of the dual-mode switching bidirectional motor, and the compression disc is made of magnetically conductive material.
[0008] Optionally, the inner ring of the one-way check valve is provided with a connecting sleeve, the compression disc is sleeved outside the connecting sleeve, the compression disc is installed on the connecting sleeve and slides along the axial direction of the connecting sleeve, the compression disc and the connecting sleeve are relatively static in the circumferential direction, the outer periphery of the connecting sleeve is provided with a mounting ring, the compression disc is located between the rotating disc and the mounting ring, the mounting ring is provided with a spring, the spring is used for abutting against the compression disc, and the spring is used for applying a force to the compression disc towards the rotating disc.
[0009] Optionally, the mounting seat is provided with at least three springs, and the plurality of springs are uniformly arranged along the circumferential direction of the output shaft.
[0010] Optionally, the total spring force F provided by the spring is specifically: ; Wherein, F is the spring force, the unit is N; T is the reverse transmission torque, the unit is N; μ is the friction coefficient of the friction material layer, the value is 0.4; R is the radius of the friction material layer on the rotating disc, the unit is mm; ; Wherein, F1 is the working load of a single spring, the unit is N; G is the shear modulus of the spring material, the unit is MPa; d is the diameter of the spring, the unit is mm; f is the spring deformation, the unit is mm; g is the acceleration of gravity, the unit is m / s 2 ; D is the diameter of the spring, the unit is mm; n is the effective number of turns; The load of a single spring satisfies the following formula: F1= ; A is the number of springs.
[0011] In summary, the present application has the following beneficial technical effects: When the motor is powered on, the separation assembly drives the compression disc away from the rotating disc, so that the motor can be forward rotated or reversed under the action of the controller. When the motor is powered off, the separation assembly loses the force acting on the compression disc, the compression disc is pressed on the rotating disc, and the compression disc can only rotate in one direction under the action of the one-way check valve. The compression disc is pressed on the rotating disc, the rotating disc is fixedly connected with the rotor assembly, that is, the rotor assembly and the one-way check valve are physically connected, and the rotor assembly can only rotate in one direction under the action of the one-way check valve, thereby realizing the function that the motor can only rotate in one direction when powered off. BRIEF DESCRIPTION OF DRAWINGS
[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described below only illustrate some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0013] Figure 1 Structure diagram of a bidirectional motor of the present application.
[0014] Legend: 1, resolver; 2, bearing; 3, rotor assembly; 4, stator assembly; 5, housing; 6, pressing plate; 7, end cover; 8, rotating disc; 9, pressing disc; 10, separation assembly; 11, one-way check valve; 12, output shaft; 13, shell; 14, mounting seat; 15, electromagnetic coil; 16, spring; 17, connecting sleeve; 18, mounting ring. DETAILED DESCRIPTION
[0015] The embodiments of the present application will be described in detail below with reference to the drawings.
[0016] The above embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. The present application can also be implemented or applied through other different specific embodiments, and each detail in the present application can be modified or changed based on different views and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0017] It should be noted that the various aspects of the embodiments described below are within the scope of the appended claims. It should be apparent that the aspects described herein can be embodied in a wide variety of forms and that any specific structure and / or function described herein is merely illustrative. Based on the teachings provided herein one skilled in the art will appreciate that one aspect can be implemented independently of any other aspects, and that an "application" can include, but is not limited to, any one or combination of the aspects described herein. For example, an apparatus can be implemented using any number of the aspects described herein. Further, an apparatus can be implemented using other structure and / or functionality not expressly described herein, but rather inferred or understood from the teachings provided herein.
[0018] It is also need to be explained that the figures provided in the following embodiments only schematically illustrate the basic concept of the present application, and only the components related to the present application are shown in the figures, not the number, shape and size of the components when actually implemented, and the shape, number and ratio of the components when actually implemented can be arbitrarily changed, and the component layout pattern can also be more complex.
[0019] In addition, in the following description, specific details are provided to facilitate thorough understanding of examples. However, one skilled in the art will understand that the described aspects can be practiced without these specific details.
[0020] The embodiment of the present application provides a dual-mode switching bidirectional motor.
[0021] As shown in Figure 1 A dual-mode switching bidirectional motor includes a housing 5, a resolver 1, a stator assembly 4, a rotor assembly 3 and an output shaft 12. The rotor assembly 3 is rotatably mounted in the housing 5 through a bearing 2, and one end of the rotor assembly 3 extends out of the housing 5. An opening is provided on the housing 5 for the end of the rotor assembly 3 to extend out. The opening of the housing 5 is closed by an end cover 7. The end cover 7 is provided with a hole for the end of the rotor assembly 3 to extend out. The rotor assembly 3 and the end cover 7 are rotatably connected through the bearing 2. The stator assembly 4 surrounds the outer periphery of the rotor assembly 3. The output shaft 12 and the rotor assembly 3 are connected through splines. The resolver 1 is mounted in the housing 5. The resolver 1 is used to measure the position, speed and rotation direction of the rotor assembly 3, and transmit these signals to a motor controller. The rotation direction of the motor is controlled by a software control algorithm to achieve bidirectional rotation of the motor when energized.
[0022] The dual-mode switching bidirectional motor in the present application further includes a shell 13, a rotating disc 8, a pressing disc 9, a separation assembly 10 and a one-way check valve 11. One end of the shell 13 is fixedly connected to one end of the housing 5 through bolts. A pressing plate 6 is provided between the shell 13 and the end cover 7. The pressing plate 6 is fixedly connected to the end cover 7 through bolts. The pressing plate 6 cooperates with a boss on the rotor assembly 3 to limit the axial movement of the rotor assembly 3. The end face of the shell 13 towards the housing 5 presses the pressing plate 6 and the end cover 7 against the open end face of the housing 5. One end of the rotor assembly 3 extends into the shell 13. One end of the output shaft 12 inside the shell 13 is connected to the rotor assembly 3 through splines. The other end of the output shaft 12 extends out of the shell 13 away from one end of the housing 5. The output shaft 12 is connected to the shell 13 through a bearing 2. The rotating disc 8, the pressing disc 9, the separation assembly 10 and the one-way check valve 11 are mounted in the shell 13.
[0023] The turntable 8 and the rotor assembly 3 are fixedly connected. The clamping plate 9 surrounds the outer periphery of the output shaft 12. The clamping plate 9 is used to press against the turntable 8 when the bidirectional motor of dual-mode switching is de-energized. The separation assembly 10 is fixedly installed inside the housing 13. The separation assembly 10 is used to drive the clamping plate 9 away from the turntable 8 when the bidirectional motor of dual-mode switching is energized. The one-way backstop 11 is fixedly installed inside the housing 13, and the inner ring of the one-way backstop 11 is connected to the clamping plate 9. The inner ring of the one-way backstop 11 is spaced apart from the output shaft 12.
[0024] When the motor is powered on, the separation component 10 drives the clamping plate 9 away from the turntable 8, allowing the motor to rotate forward or backward under the control of the controller. When the motor is powered off, the separation component 10 loses its force on the clamping plate 9, and the clamping plate 9 presses against the turntable 8. Under the action of the one-way backstop 11, the clamping plate 9 can only rotate in one direction. The clamping plate 9 presses against the turntable 8, and the turntable 8 is fixedly connected to the rotor assembly 3. That is, the rotor assembly 3 and the one-way backstop 11 form a physical connection. Under the action of the one-way backstop 11, the rotor assembly 3 can only rotate in one direction, realizing the function that the motor can only rotate in one direction when the power is off.
[0025] The turntable 8 has a friction material layer on its side facing the clamping plate 9. This increases the force between the turntable 8 and the clamping plate 9 when the clamping plate 9 is pressed against the gripper, ensuring the stability of the physical connection between the rotor assembly 3 and the inner ring of the one-way backstop 11. The friction material layer is made of resin-based friction material, powder metallurgy friction material, ceramic-based friction material, or carbon fiber friction material.
[0026] The separation assembly 10 includes a mounting base 14 and an electromagnetic coil 15. The mounting base 14 is fixedly installed inside the housing 13 and surrounds the outer periphery of the output shaft 12. The electromagnetic coil 15 is mounted on the mounting base 14 and is electrically connected to the power supply terminal of the dual-mode switching bidirectional motor. The pressure plate 9 is made of a magnetically conductive material. When the motor is powered on, the electromagnetic coil 15 is energized, and the electromagnetic coil 15 generates a magnetic attraction force on the pressure plate 9, causing the pressure plate 9 to separate from the turntable 8.
[0027] The inner ring of the one-way backstop 11 is provided with a connecting sleeve 17. The connecting sleeve 17 surrounds the outer circumference of the output shaft 12, with the inner wall of the connecting sleeve 17 and the outer wall of the output shaft 12 spaced apart. The clamping plate 9 is sleeved on the outer circumference of the connecting sleeve 17. The clamping plate 9 is slidably mounted on the connecting sleeve 17 along the axial direction, and the clamping plate 9 and the connecting sleeve 17 are relatively stationary in the circumferential direction. Specifically, the clamping plate 9 is provided with a regular hexagonal through hole. The outer circumferential side wall of the connecting sleeve 17 and the regular hexagon on the clamping plate 9 cooperate to realize that while the clamping plate 9 slides on the connecting sleeve 17, the relative circumferential rotation of the clamping plate 9 and the connecting sleeve 17 is restricted. The outer circumference of the connecting sleeve 17 is provided with a mounting ring 18. The clamping plate 9 is located between the turntable 8 and the mounting ring 18. The mounting ring 18 is provided with a spring 16. The spring 16 is used to abut against the clamping plate 9 and to apply a force to the clamping plate 9 toward the turntable 8. When the motor is de-energized, the electromagnetic coil 15 loses its magnetic attraction to the pressure plate 9. Under the action of the spring 16, the pressure plate 9 is pressed against the turntable 8, so that the turntable 8 and the one-way backstop 11 form a stable physical connection.
[0028] The mounting base 14 is provided with at least three springs 16, which are evenly arranged along the circumferential direction of the output shaft 12. This ensures the stability of the force exerted by the springs 16 on the pressure plate 9 and improves the stability of the physical connection between the pressure plate 9 and the turntable 8.
[0029] The total elastic force F provided by the spring is specifically: ; Where F is the spring force in N; T is the reverse torque in N; μ is the coefficient of friction of the friction material layer, with a value of 0.4; and R is the radius of the friction material layer on the turntable in mm. ; Where F1 is the working load of a single spring, in N; G is the shear modulus of the spring material, in MPa; d is the spring diameter, in mm; f is the spring deformation, in mm; and g is the acceleration due to gravity, in m / s². 2 D is the mean diameter of the spring, in mm; n is the number of effective coils. The load on a single spring satisfies the following equation: F1= A represents the number of springs, provided that the formula is satisfied. A spring is designed so that the frictional connection torque T1=1.2T between the final turntable 8 and the pressure plate 9, ensuring that the spring 16 can apply sufficient force to the pressure plate 9, thereby stabilizing the physical connection between the pressure plate 9 and the turntable 8.
[0030] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A bidirectional motor with dual-mode switching, comprising a housing (5), a rotor assembly (3), and an output shaft (12), wherein the rotor assembly (3) and the output shaft (12) are fixedly connected, characterized in that, It also includes a turntable (8), a clamping plate (9), a separation assembly (10), and a one-way check valve (11); The turntable (8) and the rotor assembly (3) are fixedly connected. The clamping plate (9) surrounds the outer circumference of the output shaft (12). The clamping plate (9) is used to press against the turntable (8) when the bidirectional motor of dual-mode switching is de-energized. The separation assembly (10) is installed on the housing (5). The separation assembly (10) is used to drive the clamping plate (9) away from the turntable (8) when the bidirectional motor of dual-mode switching is energized. The one-way backstop (11) is installed on the housing (5), and the inner ring of the one-way backstop (11) is connected to the clamping plate (9).
2. The bidirectional motor with dual-mode switching according to claim 1, characterized in that, The turntable (8) has a friction material layer on the side facing the pressing plate (9).
3. The bidirectional motor with dual-mode switching according to claim 2, characterized in that, The friction material layer is made of resin-based friction material, powder metallurgy friction material, ceramic-based friction material, or carbon fiber friction material.
4. The bidirectional motor with dual-mode switching according to claim 2, characterized in that, The separation assembly (10) includes a mounting base (14) and an electromagnetic coil (15). The mounting base (14) surrounds the outer periphery of the output shaft (12). The electromagnetic coil (15) is mounted on the mounting base (14). The electromagnetic coil (15) is electrically connected to the power supply terminal of the dual-mode switching bidirectional motor. The pressure plate (9) is made of magnetic material.
5. The bidirectional motor with dual-mode switching according to claim 4, characterized in that, The inner ring of the one-way check valve (11) is provided with a connecting sleeve (17), and the clamping plate (9) is sleeved on the outer periphery of the connecting sleeve (17). The clamping plate (9) is slidably mounted on the connecting sleeve (17) along the axial direction of the connecting sleeve (17), and the clamping plate (9) and the connecting sleeve are relatively stationary in the circumferential direction. The outer periphery of the connecting sleeve (17) is provided with a mounting ring (18), and the clamping plate (9) is located between the turntable (8) and the mounting ring (18). The mounting ring (18) is provided with a spring (16), which is used to abut against the clamping plate (9) and to apply a force toward the turntable (8) to the clamping plate (9).
6. The bidirectional motor with dual-mode switching according to claim 5, characterized in that, The mounting base (14) is provided with at least three springs (16), and the multiple springs (16) are evenly arranged along the circumferential direction of the output shaft (12).
7. The bidirectional motor with dual-mode switching according to claim 6, characterized in that, The total elastic force F provided by the spring is specifically: ； Where F is the spring force in N; T is the reverse torque in N; μ is the coefficient of friction of the friction material layer, with a value of 0.4; and R is the radius of the friction material layer on the turntable in mm. ； Where F1 is the working load of a single spring, in N; G is the shear modulus of the spring material, in MPa; d is the spring diameter, in mm; f is the spring deformation, in mm; and g is the acceleration due to gravity, in m / s². 2 D is the mean diameter of the spring, in mm; n is the number of effective coils. The load on a single spring satisfies the following equation: F1= A represents the number of springs.