Miniature brushless direct-current gear motor
By setting a secondary reduction component between the primary reduction component and the housing mechanism inside the motor rotor, the problem of increased size of the micro brushless DC geared motor is solved, achieving a high reduction ratio and torque amplification, which is suitable for fields such as robot joints.
Patent Information
- Application Number
- CN202422638872.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-11-04
- Estimated Expiration
- 2034-10-30
AI Technical Summary
To achieve a large reduction ratio, existing miniature brushless DC geared motors use large reduction gears, which increases the size of the motor and affects installation.
A primary reduction gear is installed inside the motor rotor, and a secondary reduction gear is installed between the motor rotor and the housing mechanism. By utilizing the internal space of the motor rotor, the reduction ratio is increased and the output torque is improved.
By setting a primary reduction component inside the motor rotor and a secondary reduction component between the housing mechanism, a high reduction ratio and torque amplification of the micro brushless DC geared motor are achieved, reducing the motor size and making it suitable for applications such as robot joints.
Smart Images
Figure CN223514727U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motors, specifically to a miniature brushless DC geared motor. Background Technology
[0002] The miniature brushless DC planetary geared motor is a compact transmission device that integrates a brushless DC motor and a planetary gearbox. It combines the high efficiency of a brushless DC motor with the high reduction ratio of a planetary gearbox, resulting in a small-sized, high-precision, and low-noise transmission device. This type of motor is widely used in various fields, including shared bicycles, smart water dispensers, coffee machines, intelligent robots, and medical equipment.
[0003] Currently, brushless DC geared motors are widely used. A gear reducer is installed on the motor to amplify the output torque by driving the reducer through the motor, thereby meeting the high torque output requirements of some mechanical equipment.
[0004] However, in order to achieve a large reduction ratio, a large reduction gear is set in the brushless DC geared motor, which leads to an increase in the size of the brushless DC geared motor and will affect the installation of the brushless DC geared motor. Utility Model Content
[0005] Therefore, the purpose of this utility model is to provide a miniature brushless DC geared motor, which aims to solve the problem that currently, in order to achieve a large reduction ratio, a large reduction gear is set in the brushless DC geared motor, which leads to an increase in the size of the brushless DC geared motor and affects the installation of the brushless DC geared motor.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a miniature brushless DC geared motor for connecting to a robot joint, the miniature brushless DC geared motor comprising: a housing mechanism, a power mechanism disposed within the housing mechanism, a reduction mechanism disposed on the power mechanism, and a control mechanism for controlling the power mechanism;
[0007] The power mechanism includes a motor stator disposed within a housing mechanism and a motor rotor disposed on the inner periphery of the motor stator;
[0008] The reduction mechanism includes a primary reduction assembly disposed inside the motor rotor and a secondary reduction assembly disposed within the housing mechanism. The secondary reduction assembly is disposed between the motor rotor and the housing mechanism and is used to connect to the robot joint.
[0009] When the motor is powered on, the motor rotor rotates, which drives the first-stage reduction gear assembly inside it to rotate, and then drives the second-stage reduction gear assembly to rotate. The robot joints follow the rotation of the second-stage reduction gear assembly.
[0010] In summary, the miniature brushless DC geared motor proposed in this utility model utilizes the internal space of the motor rotor by setting a primary reduction component inside the motor rotor and a secondary reduction component between the motor rotor and the housing mechanism. The primary and secondary reduction components also increase the reduction ratio and improve the output torque. Specifically, the power mechanism includes a motor stator located within the housing mechanism and a motor rotor located on the inner circumference of the motor stator. The reduction mechanism includes a primary reduction component inside the motor rotor and a secondary reduction component located within the housing mechanism. The secondary reduction component is located between the motor rotor and the housing mechanism and is used to connect to the robot joint. When the motor is energized, it generates a magnetic field, driving the motor rotor to rotate. The control mechanism controls the output torque, driving the primary reduction component connected to the motor rotor to rotate, which in turn drives the secondary reduction component to rotate. Since the propeller is connected to the secondary reduction component, it ultimately drives the robot joint to rotate, achieving amplified torque output.
[0011] According to one aspect of the above technical solution, the first-stage reduction assembly includes a first-stage planetary reducer connected to the motor rotor by fasteners, and a first-stage planetary carrier disposed on the first-stage planetary reducer and used for connection to the second-stage reduction assembly, wherein a first connecting member is provided between the first-stage planetary reducer and the motor rotor.
[0012] According to one aspect of the above technical solution, the first-stage planetary reducer includes a first-stage main gear and a plurality of first-stage secondary gears meshing with the first-stage main gear. One end of the first-stage main gear is engaged with the first connecting member, and the first connecting member is connected to the motor rotor by fasteners.
[0013] According to one aspect of the above technical solution, a plurality of the first-stage secondary gears are engaged with the first-stage planetary carrier to drive the first-stage planetary carrier to rotate.
[0014] According to one aspect of the above technical solution, the secondary reduction assembly includes a secondary planetary reducer and a secondary planetary carrier located at the end of the secondary planetary reducer away from the primary main gear. The secondary planetary reducer is engaged with the primary planetary carrier and rotates with the primary planetary carrier.
[0015] According to one aspect of the above technical solution, the secondary planetary reducer includes a secondary main gear and a plurality of secondary secondary gears meshing with the secondary main gear. The secondary main gear is engaged at one end of the primary planetary carrier and the secondary gears to rotate with the primary planetary carrier.
[0016] According to one aspect of the above technical solution, the secondary gear is engaged with the secondary planetary carrier to drive the secondary planetary carrier to rotate.
[0017] According to one aspect of the above technical solution, the housing mechanism includes an upper housing and a lower housing movably connected to the upper housing, and a second connecting member is sleeved on the deceleration mechanism, the second connecting member being connected to the lower housing by fasteners.
[0018] According to one aspect of the above technical solution, a plurality of locking members are provided between the motor stator and the lower housing, and the two sides of the locking members are respectively embedded in the motor stator and the lower housing.
[0019] According to one aspect of the above technical solution, the control mechanism includes a control circuit board and an encoder circuit board located at the end of the motor rotor away from the motor stator.
[0020] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0022] Figure 1 This is a schematic diagram of the structure of a miniature brushless DC geared motor in one embodiment of the present invention;
[0023] Figure 2 This is a schematic diagram of the control mechanism in one embodiment of the present invention;
[0024] Figure 3 This is a schematic diagram of the power mechanism in one embodiment of the present invention;
[0025] Figure 4 This is a schematic diagram of the motor rotor in one embodiment of the present invention;
[0026] Figure 5 This is an assembly diagram of the first connecting member and the second connecting member in one embodiment of the present utility model;
[0027] Figure 6 This is an assembly diagram of the first gear ring and the second gear ring in one embodiment of the present invention;
[0028] Figure 7 This is a schematic diagram of the deceleration mechanism in one embodiment of the present invention;
[0029] Figure 8 This is a schematic diagram of the structure of a two-stage deceleration assembly in one embodiment of the present invention;
[0030] Figure 9 This is a schematic diagram of the structure of a two-stage planetary reducer in one embodiment of the present invention.
[0031] Component symbol explanation in the attached diagram:
[0032] Housing mechanism 100, upper housing 110, lower housing 120, locking component 130, power mechanism 200, motor stator 210, motor rotor 220, reduction mechanism 300, first-stage reduction assembly 310, first-stage planetary reducer 311, first-stage main gear 312, first-stage secondary gear 313, first-stage planetary carrier 314, first connecting component 315, first-stage gear ring 316, second-stage reduction assembly 320, second-stage planetary reducer 321, second-stage main gear 322, second-stage secondary gear 323, second-stage planetary carrier 324, second connecting component 325, second-stage gear ring 326, control mechanism 400, control circuit board 410, encoder circuit board 420, sensing magnet 430, fastener 500. Detailed Implementation
[0033] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.
[0034] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
[0035] In this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.
[0036] Please see Figures 1-9The diagram shows a schematic of a miniature brushless DC geared motor provided in one embodiment of the present invention. This miniature brushless DC geared motor is used to connect to a robot joint. The motor includes a housing 100, a power mechanism 200 disposed within the housing 100, a reduction mechanism 300 disposed on the power mechanism 200, and a control mechanism 400 for controlling the power mechanism 200.
[0037] To protect the power mechanism 200, the deceleration mechanism 300, and the control mechanism 400, the housing mechanism 100 includes an upper housing 110 and a lower housing 120 movably connected to the upper housing 110. The upper housing 110 and the lower housing 120 can be connected by fasteners 500 or fastened together to enclose the power mechanism 200, the deceleration mechanism 300, and the control mechanism 400 inside, so as to prevent the above-mentioned mechanisms from being affected by severe weather when the UAV is flying.
[0038] In order to provide output torque, the power mechanism 200 includes a motor stator 210 disposed in the upper housing 110 and a motor rotor 220 disposed on the inner periphery of the motor stator 210. The motor rotor 220 rotates within the motor stator 210 to drive the reduction mechanism 300 to rotate, thereby amplifying the output torque through the reduction mechanism 300 and driving the robot joint to rotate.
[0039] To enable the motor rotor 220 to rotate, a control mechanism 400 is provided between the motor rotor 220 and the upper housing 110. The control mechanism 400 includes a control circuit board 410 and an encoder circuit board 420 located at the end of the motor rotor 220 away from the motor stator 210. At the same time, a sensing magnet 430 is provided directly below the encoder circuit board 420, that is, at the top center of the motor rotor 220. When the micro brushless DC geared motor is powered on, a magnetic field is generated. The sensing magnet 430 is affected by the magnetic field repulsion and rotates, thereby driving the motor rotor 220 to rotate within the inner circumference of the motor stator 210, which in turn drives the reduction mechanism 300 to rotate, ultimately amplifying the output torque.
[0040] Furthermore, to secure the motor stator 210, a plurality of locking members 130 are provided between the motor stator 210 and the lower housing 120. The locking members 130 are respectively embedded in the motor stator 210 and the lower housing 120 on both sides. Since the lower housing 120 and the upper housing 110 do not rotate and are directly connected to the UAV, the locking members 130 secure the motor stator 210 to the inner circumference of the lower housing 120. Simultaneously, the lower housing 120 also provides support for the power mechanism 200, the reduction mechanism 300, and the control mechanism 400.
[0041] In order to amplify the output torque, the reduction mechanism 300 includes a primary reduction component 310 disposed inside the motor rotor 220 and a secondary reduction component 320 disposed inside the housing mechanism 100. The secondary reduction component 320 is disposed between the motor rotor 220 and the housing mechanism 100 and is used to connect to the robot joint so as to amplify the output torque and drive the robot joint to rotate.
[0042] It should be noted that the gears in this embodiment are all equipped with connecting rods to engage the planetary carrier or connecting parts, ensuring gear rotation. To achieve a single-stage amplification of output torque, the first-stage reduction assembly 310 includes a first-stage planetary reducer 311 connected to the motor rotor 220 via fasteners 500, and a first-stage planetary carrier 314 disposed on the first-stage planetary reducer 311 and used to connect to the second-stage reduction assembly 320. A first connecting part 315 is provided between the first-stage planetary reducer 311 and the motor rotor 220. The first-stage planetary reducer 311 includes a first-stage main gear 312 and several first-stage secondary gears 313 meshing with the first-stage main gear 312. One end of the first-stage main gear 312 is engaged with the first connecting part 315, and the first connecting part 315 is connected to the motor rotor 220 via fasteners 500.
[0043] Fastener 500 passes through motor rotor 220 and connects to first connector 315. Simultaneously, one end of primary gear 312 passes into and is engaged within the first connector 315, allowing motor rotor 220 to drive primary gear 312 to rotate via the first connector 315, which in turn drives primary secondary gear 313 meshing with primary gear 312. Since several primary secondary gears 313 are engaged with primary planetary carrier 314, they also drive primary planetary carrier 314 to rotate. To ensure smooth rotation of the primary secondary gears 313, a primary gear ring 316 is also provided outside the primary secondary gears 313.
[0044] To achieve two-stage amplification of output torque, the two-stage reduction assembly 320 includes a two-stage planetary reducer 321 and a two-stage planetary carrier 324 located at the end of the two-stage planetary reducer 321 away from the first-stage main gear 312. The two-stage planetary reducer 321 is engaged with the first-stage planetary carrier 314 and rotates with it. The two-stage planetary reducer 321 includes a two-stage main gear 322 and several two-stage secondary gears 323 meshing with the two-stage main gear 322. The two-stage main gear 322 is engaged at the end of the first-stage planetary carrier 314 away from the secondary gears to rotate with it. The two-stage secondary gears 323 are engaged with the two-stage planetary carrier 324 to drive it to rotate.
[0045] The primary secondary gear 313 drives the primary planetary carrier 314 to rotate, which in turn drives the secondary primary gear 322 mounted on the primary planetary carrier 314 to rotate. The secondary secondary gear 323 meshing with the secondary primary gear 322 also rotates. Similarly, secondary gear rings 326 are provided on the outer circumference of several secondary secondary gears 323. Since the secondary secondary gears 323 are engaged on the secondary planetary carrier 324, the secondary planetary carrier 324 rotates with the secondary secondary gears 323, ultimately driving the robot joints connected to the secondary planetary carrier 324 to rotate.
[0046] It should be noted that a second connecting member 325 is sleeved on the aforementioned deceleration mechanism 300. The second connecting member 325 is connected to the lower housing 120 through a fastener 500. While maintaining the stable rotation of the deceleration mechanism 300, it also prevents foreign objects from entering the deceleration mechanism 300 and affecting the amplification of the output torque.
[0047] In summary, the miniature brushless DC geared motor proposed in this utility model utilizes the internal space of the motor rotor by setting a primary reduction component inside the motor rotor and a secondary reduction component between the motor rotor and the housing mechanism. The primary and secondary reduction components also increase the reduction ratio and improve the output torque. Specifically, the power mechanism includes a motor stator located within the housing mechanism and a motor rotor located on the inner circumference of the motor stator. The reduction mechanism includes a primary reduction component inside the motor rotor and a secondary reduction component located within the housing mechanism. The secondary reduction component is located between the motor rotor and the housing mechanism and is used to connect to the robot joint. When the motor is energized, it generates a magnetic field, driving the motor rotor to rotate. The control mechanism controls the output torque, driving the primary reduction component connected to the motor rotor to rotate, which in turn drives the secondary reduction component to rotate. Since the propeller is connected to the secondary reduction component, it ultimately drives the robot joint to rotate, achieving amplified torque output.
[0048] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0049] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A miniature brushless DC geared motor for connection to a robot joint, characterized in that, The miniature brushless DC geared motor includes a housing mechanism, a power mechanism disposed within the housing mechanism, a reduction mechanism disposed on the power mechanism, and a control mechanism for controlling the power mechanism; The power mechanism includes a motor stator disposed within a housing mechanism and a motor rotor disposed on the inner periphery of the motor stator; The reduction mechanism includes a primary reduction assembly disposed inside the motor rotor and a secondary reduction assembly disposed within the housing mechanism. The secondary reduction assembly is disposed between the motor rotor and the housing mechanism and is used to connect to the robot joint. When the motor is powered on, the motor rotor rotates, which drives the first-stage reduction gear assembly inside it to rotate, and then drives the second-stage reduction gear assembly to rotate. The robot joints follow the rotation of the second-stage reduction gear assembly.
2. The miniature brushless DC geared motor according to claim 1, characterized in that, The first-stage reduction assembly includes a first-stage planetary reducer connected to the motor rotor by fasteners, and a first-stage planetary carrier disposed on the first-stage planetary reducer and used for connection to the second-stage reduction assembly. A first connecting member is provided between the first-stage planetary reducer and the motor rotor.
3. The miniature brushless DC geared motor according to claim 2, characterized in that, The first-stage planetary reducer includes a first-stage main gear and several first-stage secondary gears meshing with the first-stage main gear. One end of the first-stage main gear is engaged with the first connecting member, and the first connecting member is connected to the motor rotor by fasteners.
4. The miniature brushless DC geared motor according to claim 3, characterized in that, Several of the first-stage secondary gears are engaged with the first-stage planetary carrier to drive the first-stage planetary carrier to rotate.
5. The miniature brushless DC geared motor according to claim 1, characterized in that, The secondary reduction assembly includes a secondary planetary reducer and a secondary planetary carrier located at the end of the secondary planetary reducer away from the primary main gear. The secondary planetary reducer is engaged with the primary planetary carrier and rotates with the primary planetary carrier.
6. The miniature brushless DC geared motor according to claim 5, characterized in that, The secondary planetary reducer includes a secondary main gear and several secondary secondary gears meshing with the secondary main gear. The secondary main gear is located at the end of the primary planetary carrier away from the secondary gears, so as to rotate with the primary planetary carrier.
7. The miniature brushless DC geared motor according to claim 6, characterized in that, The secondary gear is engaged with the secondary planetary carrier to drive the secondary planetary carrier to rotate.
8. The miniature brushless DC geared motor according to claim 1, characterized in that, The housing mechanism includes an upper housing and a lower housing movably connected to the upper housing. A second connecting member is sleeved on the deceleration structure, and the second connecting member is connected to the lower housing by fasteners.
9. The miniature brushless DC geared motor according to claim 8, characterized in that, A plurality of locking components are provided between the motor stator and the lower housing, and the two sides of the locking components are respectively embedded in the motor stator and the lower housing.
10. The miniature brushless DC geared motor according to claim 1, characterized in that, The control mechanism includes a control circuit board and an encoder circuit board located at the end of the motor rotor away from the motor stator.