Motor device
By adding ball bearings and brackets to the outside of the motor housing, and using the design of the annular groove and brackets to limit the axial movement of the rotor, the problem of plastic gasket limit failure is solved, and the operating efficiency and life of the motor are improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-27
- Publication Date
- 2026-04-07
AI Technical Summary
When the axial load on a small motor is too large, the plastic gasket limiter is prone to failure, which leads to increased axial movement of the rotor, affecting the motor's operating efficiency and lifespan.
A ball bearing and a bracket are added to the outside of the motor housing. The inner ring of the ball bearing is fixedly connected to the rotor shaft, and the outer ring is fixedly connected to the bracket and the housing. The axial movement of the inner and outer rings is restricted by the annular groove, and the stability of the fixed connection is improved by the bracket.
It effectively reduces the axial movement of the rotor shaft, improves motor efficiency and axial load capacity, extends motor service life, and expands the range of applications.
Smart Images
Figure CN224097539U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model embodiment relates to motor equipment technical field, in particular to a motor device. BACKGROUND
[0002] Small motors are widely used in various devices, such as drones, household appliances, industrial equipment, etc. However, in actual operation, due to various reasons, the axial movement problem of small motors often occurs, which will affect the operating efficiency and service life of the motor.
[0003] In order to solve the problem of axial movement, in the related small motor, a plurality of plastic spacers are used between the axial ends of the rotor and the shell to axially limit the rotor, thereby avoiding the axial movement of the rotor and the rotor shaft. However, when the axial load of the small motor is too large, the limiting effect of the plastic spacer is easy to fail quickly, resulting in increased axial movement of the rotor and the rotor shaft, the motor will produce impact sound, and the service life of the motor will be greatly reduced. SUMMARY
[0004] Therefore, the utility model embodiment aims to provide a motor device which effectively reduces the axial movement of the rotor shaft, improves the axial movement of the motor, improves the efficiency of the motor, increases the axial bearing capacity and service life of the motor, and expands the use range of the motor.
[0005] To achieve the above-mentioned purpose, the utility model embodiment adopts the following technical scheme:
[0006] A motor device, comprising a motor, a ball bearing and a bracket; the motor comprises a shell and a rotor shaft, the rotor shaft extends out of the shell; the ball bearing is arranged outside the shell in a spaced manner, and the inner ring of the ball bearing is fixedly sleeved on the rotor shaft; the outer ring of the ball bearing is fixedly connected with the shell through the bracket.
[0007] The motor device of the utility model embodiment effectively reduces the axial movement of the rotor shaft without changing the original design of the motor, thereby improving the axial movement problem of the motor, improving the efficiency of the motor, increasing the axial bearing capacity and service life of the motor, and expanding the use range of the motor.
[0008] As a preferred scheme of the utility model embodiment, the ball bearing comprises an inner ring, an outer ring and a plurality of balls; the outer side surface of the inner ring and / or the inner side surface of the outer ring is provided with an annular groove; the plurality of balls are movably arranged between the inner ring and the outer ring and are respectively located in the annular groove. Through the design of the annular groove, the relative axial movement between the inner ring and the outer ring can be limited, thereby reducing the axial movement of the rotor shaft.
[0009] As a preferred scheme of the utility model embodiment, the outer side surface of the inner ring is provided with a first annular groove, the inner side surface of the outer ring is provided with a second annular groove corresponding to the first annular groove, and the plurality of balls are movably arranged between the first annular groove and the second annular groove. Through the above design, the plurality of balls are rolled in the space between the first annular groove and the second annular groove, effectively limiting the relative axial movement between the inner ring and the outer ring, thereby effectively reducing the axial movement amount of the rotor shaft.
[0010] As a preferred scheme of the utility model embodiment, the bracket is fixedly sleeved on the outer ring of the ball bearing, and the bracket extends to the shell and is fixedly connected with the shell. Through the above design, the stability of the fixed connection of the bracket with the outer ring of the ball bearing and the shell can be effectively improved, and the structural strength is improved.
[0011] As a preferred scheme of the utility model embodiment, the bracket is arc-shaped, and the middle part of the bracket is provided with a through hole matched with the outer side surface of the outer ring. The bracket is sleeved on the outer ring of the ball bearing through the through hole and is fixedly connected with the outer ring of the ball bearing. The two ends of the bracket are fixedly connected with the shell. Through the arc-shaped bracket, the outer ring of the ball bearing can be stably fixed in the shell through the bracket.
[0012] As a preferred scheme of the utility model embodiment, the motor further comprises a stator and a rotor. The inside of the shell is a hollow structure. One end of the rotor shaft is rotatably arranged in the shell, and the other end of the rotor shaft extends out of the shell. The rotor is arranged in the shell and is fixedly sleeved on the rotor shaft. The stator is fixedly arranged in the shell and located at the outer periphery of the rotor. The above is a specific embodiment of the motor structure. The stator generates a rotating magnetic field to drive the rotor and the rotor shaft to rotate.
[0013] As a preferred scheme of the utility model embodiment, plastic washers are arranged between the axial ends of the rotor and the shell. Through the arrangement of the plastic washers, the axial movement amount of the rotor can be reduced, and the problem of axial movement of the motor is further improved.
[0014] As a preferred scheme of the utility model embodiment, the shell comprises a front cover, a front shell and a rear shell; the front shell and the rear shell are respectively in a half-enclosing structure, and the front shell and the rear shell are fixedly connected and enclose to form a hollow structure; the front cover is fixedly arranged on the outside of the bottom wall of the front shell, and the bracket is fixedly connected with the outside surface of the front cover; one end of the rotor shaft penetrates through the front shell and extends into the hollow structure and is arranged on the bottom wall of the rear shell, wherein the rotor shaft is rotatably arranged on the center of the bottom wall of the front shell and the bottom wall of the rear shell; the rotor is fixedly arranged on the rotor shaft and located between the bottom wall of the front shell and the bottom wall of the rear shell, wherein the plastic gasket is arranged between the other end of the rotor and the bottom wall of the rear shell and between one end of the rotor and the bottom wall of the front shell; the stator is arranged on the side wall of the front shell and / or the side wall of the rear shell and located at the outer periphery of the rotor. The above-mentioned specific embodiment of the shell is beneficial to arranging the stator, the rotor, the rotor shaft and other components on the relevant structure of the shell, and facilitates assembly.
[0015] As a preferred scheme of the utility model embodiment, the motor further comprises a PCB terminal block and a terminal post; the PCB terminal block is fixedly arranged on the shell; the terminal post is arranged on the PCB terminal block, one end of the terminal post is connected with the stator, and the other end of the terminal post is used for connecting an external power supply. Through the arrangement of the PCB terminal block and the terminal post, it is beneficial to connecting the external power supply to form a circuit, thereby generating a rotating magnetic field in the stator, and further driving the rotor and the rotor shaft to rotate.
[0016] As a preferred scheme of the utility model embodiment, the motor further comprises sealing glue which is detachably arranged on the other end of the terminal post, and the sealing glue is used for protecting the PCB terminal block and the terminal post. Through the arrangement of the sealing glue, the PCB terminal block and the terminal post are protected, and dustproof, waterproof and the like are achieved. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is a cross-sectional schematic view of the motor structure in the related art;
[0018] Figure 2 It is a structural schematic view of the motor device of the utility model embodiment;
[0019] Figure 3 It is a cross-sectional schematic view of Figure 2 ;
[0020] Figure 4 It is an assembly structure schematic view of the rotor shaft, the ball bearing and the bracket;
[0021] Figure 5 It is an assembly drawing of the motor device of the utility model embodiment;
[0022] In the figure: 1, motor; 2, ball bearing; 21, inner ring; 211, first annular groove; 22, outer ring; 221, second annular groove; 23, ball; 3, bracket; 31, through hole; 11, shell; 111, front cover; 112, front shell; 113, rear shell; 114, opening; 12, rotor shaft; 13, rotor; 14, stator; 15, plastic gasket; 16, PCB terminal board; 17, terminal post; 18, sealant. DETAILED DESCRIPTION
[0023] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.
[0024] In addition, the terms first, second, third and the like in the description and claims are only used for the purpose of distinguishing the description of the same technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated, nor necessarily describing the order or time sequence. In appropriate cases, the terms are interchangeable. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features.
[0025] Similarly, the term "connection" is also used in the description and claims, and should not be understood as being limited to direct connection. Therefore, the expression "device A is connected to device B" should not be limited to device A being directly connected to device B in the device or system, which means that there is a path between device A and device B, which can be a path including other devices or tools.
[0026] Example 1
[0027] Small motors are widely used in various devices, such as drones, household appliances, industrial equipment, etc. However, in actual operation, due to various reasons, the axial movement problem of small motors often occurs, which will affect the operating efficiency and service life of the motor. In order to solve the problem of axial movement of the motor, please refer to Figure 1In the related art, the rotor 13 is axially limited by using a plurality of plastic spacers 15 between the axial ends of the rotor 13 and the shell 11 of the motor 1. In this scheme, the axial displacement is the gap between the plastic spacers 15 and the shell 11 of the motor 1, which is 0.1-0.8mm, and the axial displacement is still large. Moreover, when the axial load of the motor 1 is too large, the plastic spacers 15 are easily affected by the impact of the axial displacement of the rotor 13 or the friction generated during rotation, and thus are quickly damaged, thereby increasing the axial displacement of the rotor 13, causing the motor 1 to produce a knocking sound, and greatly reducing the service life of the motor.
[0028] To improve the problem of motor axial displacement, the utility model embodiment provides a motor device, please refer to Figure 2 and Figure 3 , comprising a motor 1, a ball bearing 2 and a bracket 3. The motor 1 comprises a shell 11 and a rotor shaft 12, and the rotor shaft 12 extends out of the shell 11. The ball bearing 2 is arranged at intervals outside the shell 11, and the inner ring 21 of the ball bearing 2 is fixedly sleeved on the rotor shaft 12; the outer ring 22 of the ball bearing 2 is fixedly connected with the shell 11 through the bracket 3. Please refer to Figure 1 and Figure 2 , the motor device of the utility model embodiment, without changing the original design of the motor 1, the ball bearing 2 and the bracket 3 are additionally arranged outside the shell of the motor 1, the inner ring 21 of the ball bearing 2 is fixedly connected with the rotor shaft 12, the outer ring 22 of the ball bearing 2 is fixedly connected with the bracket 3, and the bracket 3 is fixedly connected with the shell 11 of the motor 1, so that the axial displacement of the rotor shaft 12 can be effectively reduced, and the efficiency of the motor 1 can be improved, the axial bearing capacity and the service life of the motor 1 can be increased, and thus the use range of the motor 1 is expanded.
[0029] Please refer to Figure 2 and Figure 3 , the ball bearing 2 comprises an inner ring 21, an outer ring 22 and a plurality of balls 23; the outer side surface of the inner ring 21 and / or the inner side surface of the outer ring 22 is provided with an annular groove; the plurality of balls 23 are arranged between the inner ring 21 and the outer ring 22 and respectively roll in the annular grooves. In one specific scheme of the utility model embodiment, please refer to Figure 4The inner ring 21 is sleeved on the rotor shaft 12 and is welded and fixed with the rotor shaft 12, the outer side of the inner ring 21 is provided with a first annular groove 211, the inner side of the outer ring 22 is provided with a second annular groove 221 corresponding to the first annular groove 211, and a plurality of rolling balls 23 are movably arranged between the first annular groove 211 and the second annular groove 221.
[0030] Please refer to Figure 4 The bracket 3 is fixedly sleeved on the outer ring 22 of the ball bearing 2, and the bracket 3 extends to the shell 11 and is fixedly connected with the shell 11. In an embodiment of the utility model, the bracket 3 is in an arc shape, and the middle part of the bracket 3 is provided with a through hole 31 matched with the outer side of the outer ring 22; the bracket 3 is sleeved on the outer ring 22 of the ball bearing 2 through the through hole 31 and is welded and fixed with the outer ring 22 of the ball bearing 2; and the two ends of the bracket 3 are fixedly connected with the shell 11. The bracket 3 in an arc shape can effectively improve the stability of the fixed connection of the bracket 3 with the outer ring 22 of the ball bearing 2 and the shell 11 respectively and improve the structural strength. The shape or structure of the bracket 3 can also be designed according to actual requirements by those skilled in the art, and the outer ring 22 of the ball bearing 2 can be fixed on the shell 11 of the motor 1 through the bracket 3.
[0031] As a specific structure of the motor 1 in the embodiment of the utility model, please refer to Figure 3 and Figure 5 The motor 1 further comprises a rotor 13 and a stator 14; the inside of the shell 11 is in a hollow structure; one end of the rotor shaft 12 is rotatably arranged in the shell 11, and the other end of the rotor shaft 12 extends out of the shell 11; the rotor 13 is arranged in the shell 11 and is fixedly sleeved on the rotor shaft 12; and the stator 14 is fixedly arranged in the shell 11 and is located at the outer periphery of the rotor 13. In the embodiment of the utility model, plastic spacers 15 are arranged between the axial two ends of the rotor 13 and the shell 11. The arrangement of the plastic spacers 15 can reduce the axial displacement of the rotor 13 and further reduce the axial displacement of the rotor shaft 12.
[0032] Specifically, the shell 11 comprises a front cover 111, a front shell 112 and a rear shell 113; the front shell 112 and the rear shell are respectively in a half-enclosing structure, and are fixedly connected to each other and form a hollow structure. The front cover 111 is fixedly arranged on the outer side of the bottom wall of the front shell 112, and the bracket 3 is fixedly connected to the outer side of the front cover 111. One end of the rotor shaft 12 penetrates through the bottom wall of the front shell 112 and extends into the hollow structure and is arranged on the bottom wall of the rear shell 113, wherein the rotor shaft 12 is rotatably arranged on the center of the bottom wall of the front shell 112 and the bottom wall of the rear shell 113 respectively; the rotor 13 is fixedly arranged on the rotor shaft 12 and located between the bottom wall of the front shell 112 and the bottom wall of the rear shell 113, wherein the one end of the rotor 13 and the bottom wall of the front shell 112 and the other end of the rotor 13 and the bottom wall of the rear shell 113 are respectively provided with plastic spacers 15 (movably arranged on the rotor shaft 12); the stator 14 is provided with two groups, which are fixedly arranged on the side wall of the front shell 112 and the side wall of the rear shell 113 respectively and located at the outer periphery of the rotor 13, and a rotating magnetic field is generated through the stator 14 to drive the rotor 13 and the rotor shaft 12 to rotate.
[0033] In the embodiment of the utility model, motor 1 still include PCB terminal block 16, terminal post 17, PCB terminal block 16 fixedly arranged on shell 11, the side wall of shell 11 is seted up with the opening 114 that communicates with internal hollow structure, and PCB terminal block 16 is fixedly arranged on the outer side wall at the opening 114 of shell 11, terminal post 17 is seted up on PCB terminal block 16, and one end of terminal post 17 is connected with stator 14, and the other end is used to connect external power supply. Through the setting of PCB terminal block 16 and terminal post 17, it is favorable to connect external power supply to form a circuit, to further make rotating magnetic field generate in stator 14, to further drive rotor 13 and rotor shaft 12 to rotate. Motor 1 still includes sealant 18 that can be detachably arranged on the other end of terminal post 17, and the sealant 18 is UV glue, and the sealant 18 is used to protect PCB terminal block 16 and terminal post 17, such as dustproof, waterproof and the like.
[0034] The motor device of the embodiment of the utility model, under the condition that the original design of motor 1 is not changed, the ball bearing 2 and the bracket 3 are additionally arranged outside the shell of motor 1, which can effectively reduce the axial displacement of rotor shaft 12, the axial displacement is the axial gap of the ball bearing, which is 0.05-0.1mm. The motor device of the embodiment of the utility model, through the above design, effectively improves the efficiency of motor 1, increases the axial bearing capacity and service life of motor 1, and expands the use range of motor 1.
[0035] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent scope. It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model embodiments, several modifications and improvements can be made, and the utility model embodiments also intend to include these changes and modifications.
Claims
1. A motor device, characterized in that: The device includes a motor (1), ball bearings (2), and a bracket (3); the motor (1) includes a housing (11) and a rotor shaft (12), the rotor shaft (12) extending out of the housing (11); the ball bearings (2) are spaced apart outside the housing (11), and the inner ring (21) of the ball bearings (2) is fixedly sleeved on the rotor shaft (12); the outer ring (22) of the ball bearings (2) is fixedly connected to the housing (11) through the bracket (3).
2. The motor device according to claim 1, characterized in that: The ball bearing (2) includes an inner ring (21), an outer ring (22) and a plurality of balls (23); the outer side of the inner ring (21) and / or the inner side of the outer ring (22) are provided with an annular groove; the plurality of balls (23) are respectively movably disposed between the inner ring (21) and the outer ring (22) and are respectively located in the annular groove.
3. The motor device according to claim 2, characterized in that: The outer side of the inner ring (21) is provided with a first annular groove (211), and the inner side of the outer ring (22) is provided with a second annular groove (221) corresponding to the first annular groove (211). The plurality of balls (23) are respectively movably disposed between the first annular groove (211) and the second annular groove (221).
4. The motor device according to claim 1, characterized in that: The bracket (3) is fixedly sleeved on the outer ring (22) of the ball bearing (2), and the bracket (3) extends to the housing (11) and is fixedly connected to the housing (11).
5. The motor device according to claim 4, characterized in that: The bracket (3) is arc-shaped, and the middle part of the bracket (3) is provided with a through hole (31) that is adapted to the outer side of the outer ring (22); the bracket (3) is sleeved on the outer ring (22) of the ball bearing (2) through the through hole (31) and is fixedly connected to the outer ring (22) of the ball bearing (2); the two ends of the bracket (3) are respectively fixedly connected to the housing (11).
6. The motor device according to claim 1, characterized in that: The motor (1) also includes a rotor (13) and a stator (14); the interior of the housing (11) is a hollow structure; one end of the rotor shaft (12) is rotatably disposed inside the housing (11), and the other end of the rotor shaft (12) extends out of the housing (11); the rotor (13) is disposed inside the housing (11) and fixedly sleeved on the rotor shaft (12); the stator (14) is fixedly disposed inside the housing (11) and located on the outer periphery of the rotor (13).
7. The motor device according to claim 6, characterized in that: Plastic gaskets (15) are provided between the two axial ends of the rotor (13) and the housing (11).
8. The motor device according to claim 7, characterized in that: The housing (11) includes a front cover (111), a front housing (112), and a rear housing (113); the front housing (112) and the rear housing (113) are respectively semi-enclosed structures, and the front housing (112) and the rear housing (113) are fixedly connected to each other and enclosed to form a hollow structure; the front cover (111) is fixedly disposed on the outside of the bottom wall of the front housing (112), and the bracket (3) is fixedly connected to the outer side of the front cover (111); one end of the rotor shaft (12) passes through the front housing (112), extends into the hollow structure, and is disposed on the bottom wall of the rear housing (113), wherein the rotor shaft (12) is rotatable. The rotor (13) is dynamically disposed on the bottom wall of the front housing (112) and the bottom wall of the rear housing (113) at the center; the rotor (13) is fixedly disposed on the rotor shaft (12) and located between the bottom wall of the front housing (112) and the bottom wall of the rear housing (113), wherein the plastic gasket (15) is respectively disposed between the bottom wall of the front housing (112) and one end of the rotor (13) and between the other end of the rotor (13) and the bottom wall of the rear housing (113); the stator (14) is disposed on the side wall of the front housing (112) and / or the side wall of the rear housing (113) and located on the outer periphery of the rotor (13).
9. The motor device according to claim 6, characterized in that: The motor (1) also includes a PCB terminal block (16) and a terminal block (17); the PCB terminal block (16) is fixedly mounted on the housing (11); the terminal block (17) is mounted on the PCB terminal block (16), one end of the terminal block (17) is connected to the stator (14), and the other end is used to connect to an external power source.
10. The motor device according to claim 9, characterized in that: The motor (1) also includes a sealant (18) detachably disposed on the other end of the terminal block (17), the sealant (18) being used to protect the PCB terminal block (16) and the terminal block (17).