Quick response motor and motor turntable
By setting the bearings in the motor to keep the rotor and the mandrel coaxially connected, the problems of high inertia and poor response speed of traditional motors are solved, and faster response speed and simpler structure are achieved.
Patent Information
- Application Number
- CN202420896711.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-27
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-04-27
AI Technical Summary
Traditional motors rotate with rotor and mandrel together, resulting in high inertia and poor response speed.
By providing bearings between the rotor and the mandrel, the rotor is kept coaxially connected to the mandrel, and the rotor rotates without moving the mandrel, thereby reducing rotational mass and inertia.
It improves the response speed of the motor, reduces the complexity of the overall structure and assembly difficulty, and facilitates maintenance.
Smart Images
Figure CN222441447U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a fast-response motor and a motor turntable. Background Art
[0002] Motor generally refers to electric motor, also called motor, which is one of the most important devices for converting electrical energy into mechanical energy. The motor is mainly composed of two parts, the fixed stator part and the rotating rotor part. The rotor and stator of traditional motors are usually large in size, which makes the overall volume of the motor larger, and the rotor and the core shaft are installed together, so the mass of the rotating part of the motor is large, resulting in a large inertia of the rotating part, which in turn causes the motor to start slowly or brake slowly, making the motor's response speed poor. Utility Model Content
[0003] The utility model aims to solve at least one of the technical problems existing in the prior art, and provides a fast response motor and a motor turntable, so that the core shaft does not rotate with the rotor to reduce the rotational inertia and improve the response speed of the motor.
[0004] The utility model provides a fast response motor, comprising: a base plate 1; a coaxially arranged shell 2, a core shaft 3, a rotor 4 and a stator 5, the shell 2 is fixed on the base plate 1, the stator 5 is fixed on the inner wall of the shell 2, and the rotor 4 is located between the core shaft 3 and the rotor 4; the lower end of the core shaft 3 is fixedly connected to the base plate 1; a bearing is provided between the outer wall of the core shaft 3 and the inner wall of the rotor 4, so that the rotor 4 rotates relative to the core shaft 3 and the stator 5 according to the bearing.
[0005] In some preferred embodiments, the number of bearings is one or more.
[0006] In some preferred embodiments, the bearing includes a first bearing 61 and a second bearing 62 , the first bearing 61 is disposed at the upper end of the rotor 4 , and the second bearing 62 is disposed at the lower end of the rotor 4 .
[0007] In some preferred embodiments, the upper and lower ends of the inner wall of the rotor 4 are respectively provided with a first step portion 41 and a second step portion 42 , the first step portion 41 abuts against the upper end surface of the outer ring of the first bearing 61 , and the second step portion 42 abuts against the lower end surface of the outer ring of the second bearing 62 .
[0008] In some preferred embodiments, a limiting plate 71 is provided between the lower end surface of the outer ring of the first bearing 61 and the upper end surface of the outer ring of the second bearing 62 , and the limiting plate 71 is connected to the inner wall of the rotor 4 .
[0009] In some preferred embodiments, the upper and lower ends of the limit plate 71 are respectively connected to the inner wall of the rotor 4 , and an assembly seam 43 is provided between the middle of the limit plate 71 and the inner wall of the rotor 4 ; and an air avoidance groove 44 is provided between the limit plate 71 and the outer wall of the core shaft 3 .
[0010] In some preferred embodiments, the upper and lower ends of the inner wall of the core shaft 3 are respectively provided with a third step portion 31 and a fourth step portion 32, and the fourth step portion 32 abuts against the lower end surface of the inner ring of the second bearing 62; a second limit member is connected to the third step portion 31, and the second limit member abuts against the upper end surface of the inner ring of the first bearing 61.
[0011] In some preferred embodiments, the second limiting unit includes a limiting ring 72 fixedly connected to the core shaft 3 and a plurality of washers 73 located between the limiting ring 72 and the upper end surface of the inner ring of the first bearing 61 .
[0012] In some preferred embodiments, a accommodating cavity 11 is provided between the base plate 1 and the lower end of the rotor 4. A circular grating scale 91 and a reading head 92 arranged relative to the circular grating scale 91 are provided in the accommodating cavity 11. The circular grating scale 91 is fixed on the lower end surface of the rotor 4, and the reading head 92 is fixed on the base plate 1.
[0013] In addition, the utility model also discloses a motor turntable, including a turntable and the quick-response motor, wherein the turntable is fixedly connected to the top end of the rotor 4 .
[0014] Compared with the defects of traditional motors that have large inertia and poor response speed when the rotor and the core shaft are installed together for rotation, the motor of the utility model keeps the rotor and the core shaft coaxially connected through bearings, and the rotor rotates while the core shaft does not move, which can reduce the rotating mass and make the inertia smaller, thereby improving the response speed of the motor. In addition, the overall structure of the motor is simple, which is convenient for assembly and later inspection and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model fast response motor.
[0016] Figure 2 It is a schematic diagram of the internal structure of the quick response motor of the utility model.
[0017] Figure 3 yes Figure 2 A magnified schematic diagram of part A in the figure.
[0018] Figure 4 yes Figure 2 Enlarged schematic diagram of part B in the middle.
[0019] The meanings of the numbers in the figure are as follows: 1-base plate, 11-accommodating chamber, 2-housing, 3-core shaft, 31-third step portion, 32-fourth step portion, 4-rotor, 41-first step portion, 42-second step portion, 43-assembly seam, 44-avoidance groove, 5-stator, 61-first bearing, 62-second bearing, 71-limiting plate, 72-limiting ring, 73-washer, 91-circular grating scale, 92-reading head. DETAILED DESCRIPTION
[0020] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined purpose, the specific implementation methods, structures, features and effects of the present application are described in detail below in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures, or characteristics in one or more embodiments may be combined in any suitable form.
[0021] The utility model discloses a fast response motor (referred to as "motor"), which, compared with the defects of a traditional motor in which a rotor and a core shaft are mounted together for rotation, such as large inertia and poor response speed, has a rotor and a core shaft connected coaxially through a bearing, and the rotor rotates while the core shaft does not move, which can reduce the rotating mass and make the inertia smaller, thereby improving the response speed of the motor.
[0022] Combination Figure 1 and Figure 2 As shown, the motor includes: a base plate 1; a coaxially arranged shell 2, a core shaft 3, a rotor 4 and a stator 5, the shell 2 is fixed on the base plate 1, the stator 5 is fixed on the inner wall of the shell 2, and the rotor 4 is located between the core shaft 3 and the rotor 4; a receiving groove is provided on the base plate 1, and the lower end of the core shaft 3 is fixed in the receiving groove so that the lower end of the core shaft 3 is fixedly connected to the base plate 1, so that the core shaft 3 does not rotate; a bearing is provided between the outer wall of the core shaft 3 and the inner wall of the rotor 4, the inner ring of the bearing is sleeved on the core shaft 3, and the outer ring of the bearing is connected to the inner wall of the rotor 4, so that the rotor 4 can rotate relative to the core shaft 3 and the stator 5 according to the bearing.
[0023] With such a structure, the rotor 4 is no longer a fixed structure with the core shaft 3, and the core shaft 3 will not rotate with the rotor 4, which can reduce the mass of the rotating part of the motor, thereby reducing the inertia of the motor, which is beneficial to improving the response speed of the motor.
[0024] It is understandable that the stator 5, the rotor 4 and the core shaft 3 are all configured as cylindrical structures, and the inner cavity of the housing 2 is also correspondingly a cylindrical cavity. The lower end of the rotor 4 is disposed in the housing 2, and the upper end of the rotor 4 extends out of the housing 2. The stator 5 generally includes a silicon steel sheet and a coil, and the stator 5 is fixed to the inner wall of the housing 2 by: firstly, the silicon steel sheet and the coil are glued in a glue-filling tool, and the whole is placed in the housing 2, and the stator 5 and the housing 2 are fixed by glue; the silicon steel sheet and the coil are connected to the inner wall of the housing through glue and then glued.
[0025] The number of bearings is one or more, and the use of multiple bearings is conducive to better maintaining stable concentricity between the rotor 4 and the core shaft 3 when rotating.
[0026] In some preferred embodiments, the bearing includes a first bearing 61 and a second bearing 62, wherein the first bearing 61 is disposed at the upper end of the rotor 4, and the second bearing 62 is disposed at the lower end of the rotor 4. The first bearing 61 and the second bearing 62 limit the rotor 4 from the upper and lower ends respectively, so that the rotor 4 maintains a stable concentricity and rotates smoothly and reliably.
[0027] Further integration Figure 3 and Figure 4 As shown, a first step portion 41 is provided at the upper end of the inner wall of the rotor 4, and the first step portion 41 abuts against the upper end surface of the outer ring of the first bearing 61, so that the first step portion 41 provides a limiting assembly for the first bearing 61; a second step portion 42 is provided at the lower end of the inner wall of the rotor 4, and the second step portion 42 abuts against the lower end surface of the outer ring of the second bearing 62, so that the second step portion 42 provides a limiting support for the second bearing 62.
[0028] In addition, a limit plate 71 is provided between the lower end surface of the outer ring of the first bearing 61 and the upper end surface of the outer ring of the second bearing 62. The limit plate 71 is connected to the inner wall of the rotor 4. The top end of the limit plate 71 abuts against the lower end surface of the outer ring of the first bearing 61, and the bottom end of the limit plate 71 abuts against the upper end surface of the outer ring of the second bearing 62. The limit plate 71 is used to provide limitation for the first bearing 61 and the second bearing 62.
[0029] In some preferred embodiments, the upper and lower ends of the limit plate 71 are respectively connected to the inner wall of the rotor 4, and an assembly seam 43 is provided between the middle portion of the limit plate 71 and the inner wall of the rotor 4. The assembly seam 43 can reduce the machining accuracy requirements of the inner portion of the rotor 4 relative to the limit plate 71, which is conducive to reducing the manufacturing cost of the rotor 4. There is an air avoidance groove 44 between the limit plate 71 and the outer wall of the core shaft 3. The existence of the air avoidance groove 44 can ensure that the limit plate 71 will not interfere with the core shaft 3 during the rotation of the rotor 4.
[0030] In some preferred embodiments, a third step portion 31 is provided at the upper end of the inner wall of the core shaft 3 , and a second stopper is connected to the third step portion 31 , and the second stopper abuts against the upper end surface of the inner ring of the first bearing 61 .
[0031] The second limiting unit includes a limiting ring 72 fixedly connected to the core shaft 3 and a plurality of washers 73 located between the limiting ring 72 and the upper end surface of the inner ring of the first bearing 61, so that the limiting ring 72 abuts against the upper end surface of the inner ring of the first bearing 61 through the washers 73. The washers 73 are preferably elastic washers, which have the purpose of pre-tightening and prevent the first bearing 61 from loosening during rotation. In addition, the limiting ring 72 and the core shaft 3 are preferably connected by threads to facilitate disassembly and maintenance.
[0032] In some preferred embodiments, a fourth step portion 32 is provided at the lower end of the inner wall of the core shaft 3 , and the fourth step portion 32 abuts against the lower end surface of the inner ring of the second bearing 62 , so that the second step portion 42 provides limiting support for the second bearing 62 .
[0033] It can be seen that by arranging the first step portion 41 and the second step portion 42 on the inner wall of the rotor 4, and cooperating with the limiting plate 71, the outer ring of the first bearing 61 and the outer ring of the second bearing 62 are respectively limited and assembled; by arranging the third step portion 31 and the fourth step portion 42 on the outer wall of the core shaft 3, and cooperating with the second limiting piece arranged at the end of the core shaft to limit and assemble the inner ring of the first bearing 61 and the inner ring of the second bearing 62 with the core shaft 3, the first bearing 61 and the second bearing 62 can be conveniently and reliably assembled between the rotor 4 and the core shaft 3, so that the rotor 4 can rotate relative to the core shaft 3 according to the first bearing 61 and the second bearing 62, and maintain stable and reliable rotation concentricity.
[0034] When installing the motor, the core shaft 3 and the rotor 4 can be installed first, and the core shaft 3 and the rotor 4 can be installed together in the housing 2, and the bottom plate 1 and the core shaft 3 can be connected and fixed by the studs. In this way, when the motor needs to be repaired, the core shaft 3 and the rotor 4 can be taken out of the housing 2 by removing the studs connecting the core shaft 3 and the bottom plate 1, so as to facilitate the repair operation.
[0035] In some preferred embodiments, a accommodating cavity 11 is further provided between the base plate 1 and the lower end of the rotor 4, and a circular grating scale 91 and a reading head 92 arranged relative to the circular grating scale 91 are provided in the accommodating cavity 11. The circular grating scale 91 is fixed to the lower end surface of the rotor 4 and rotates with the rotor 4, and the reading head 92 is fixed on the base plate 1. The circular grating scale 91 is read by the reading head 92 to determine the rotation angle of the rotor 4 after the motor is started.
[0036] The utility model also discloses a motor turntable, including the aforementioned motor and a turntable (not shown in the drawings), the turntable is fixedly connected to the top of the rotor 4 extending out of the housing 2 by screws or other fixing methods, and the turntable is driven to rotate synchronously by the rotor 4. The motor turntable has the advantages of simple structure, convenient maintenance and fast response.
[0037] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A fast response motor, comprising: A base plate (1); a housing (2), a core shaft (3), a rotor (4) and a stator (5) arranged coaxially, the housing (2) being fixed on the base plate (1), the stator (5) being fixed on the inner wall of the housing (2), and the rotor (4) being located between the core shaft (3) and the rotor (4); characterized in that: The lower end of the core shaft (3) is fixedly connected to the bottom plate (1); A bearing is provided between the outer wall of the core shaft (3) and the inner wall of the rotor (4), so that the rotor (4) rotates relative to the core shaft (3) and the stator (5) according to the bearing.
2. The fast response motor according to claim 1, characterized in that: The number of bearings is one or more.
3. The fast response motor according to claim 1, characterized in that: The bearing comprises a first bearing (61) and a second bearing (62), wherein the first bearing (61) is arranged at the upper end of the rotor (4), and the second bearing (62) is arranged at the lower end of the rotor (4).
4. The fast response motor according to claim 3, characterized in that: A first step portion (41) and a second step portion (42) are respectively provided at the upper end and the lower end of the inner wall of the rotor (4); the first step portion (41) abuts against the upper end surface of the outer ring of the first bearing (61); and the second step portion (42) abuts against the lower end surface of the outer ring of the second bearing (62).
5. The fast response motor according to claim 4, characterized in that: A limiting plate (71) is provided between the lower end surface of the outer ring of the first bearing (61) and the upper end surface of the outer ring of the second bearing (62), and the limiting plate (71) is connected to the inner wall of the rotor (4).
6. The fast response motor according to claim 5, characterized in that: The upper and lower ends of the limit plate (71) are respectively connected to the inner wall of the rotor (4); an assembly seam (43) is provided between the middle of the limit plate (71) and the inner wall of the rotor (4); and a clearance groove (44) is provided between the limit plate (71) and the outer wall of the core shaft (3).
7. The fast response motor according to claim 4, characterized in that: The inner wall upper end and lower end of the core shaft (3) are respectively provided with a third step portion (31) and a fourth step portion (32), and the fourth step portion (32) abuts against the lower end surface of the inner ring of the second bearing (62); the second stopper is connected to the third step portion (31), and the second stopper abuts against the upper end surface of the inner ring of the first bearing (61).
8. The fast response motor according to claim 7, characterized in that: The second limiting unit comprises a limiting ring (72) fixedly connected to the core shaft (3) and a plurality of washers (73) located between the limiting ring (72) and the upper end surface of the inner ring of the first bearing (61).
9. The fast response motor according to any one of claims 1 to 8, characterized in that: A receiving chamber (11) is provided between the base plate (1) and the lower end of the rotor (4). A circular grating scale (91) and a reading head (92) arranged relative to the circular grating scale (91) are provided in the receiving chamber (11). The circular grating scale (91) is fixed to the lower end surface of the rotor (4), and the reading head (92) is fixed to the base plate (1).
10. A motor turntable, comprising a turntable, characterized in that: It also comprises a fast response motor as claimed in any one of claims 1 to 9, wherein the turntable is fixedly connected to the top end of the rotor (4).