Embedded stator and rotor of low-voltage servo motor

Abstract

The utility model discloses an embedded stator and rotor of a low-voltage servo motor, which comprises a motor body consisting of a casing, a rear end cover and a stator and rotor, the stator and rotor comprises a stator assembly and a rotor assembly, the stator assembly consists of a plurality of groups of coil windings arranged in the casing, and the rotor assembly consists of a plurality of groups of coil windings arranged in the casing. The coil winding comprises a bracket and a plurality of groups of iron sheets clamped on the bracket, the plurality of groups of iron sheets are stacked to form a stator iron core, and a plurality of circles of copper wires are wound on the stator iron core to form the coil winding; the rotor assembly comprises a rotor core formed by stacking a plurality of iron rings and a magnetic element, the magnetic element is arranged and fixed in the cavity, the rotor assembly further comprises a rotating shaft, and the rotating shaft is fixed in the middle of the rotor core. According to the utility model, the stator and the rotor are embedded, so that the rotation of the rotating shaft of the permanent magnet motor is ensured, the casing is not influenced, the motor can be fixed by the casing, and larger fastening force is generated.

Description

Technical Field

[0001] This utility model belongs to the field of motor technology, and in particular relates to an embedded stator and rotor of a low-voltage servo motor. Background Technology

[0002] An electric motor is a device that converts electrical energy into mechanical energy. It utilizes a rotating magnetic field generated by a current-carrying coil (stator winding) that acts on a rotor (such as a squirrel-cage closed aluminum frame) to create magnetoelectric torque. Electric motors are classified into DC motors and AC motors based on the power source they use. Most motors in power systems are AC motors, which can be synchronous or asynchronous (the stator magnetic field speed and rotor rotation speed are not synchronized). An electric motor mainly consists of a stator and a rotor. The direction of the force on a current-carrying conductor in a magnetic field depends on the direction of the current and the direction of the magnetic field lines. The working principle of an electric motor is that the magnetic field exerts a force on the current, causing the motor to rotate.

[0003] Currently, most electric motors are fixed to the housing by magnets, with the coil rotating inside. However, this requires brushes to switch the circuit direction, and the brushes generate friction, which affects efficiency and lifespan. Therefore, brushless motors were later developed. In this type of motor, the coil is stationary while the outer housing rotates. However, the housing of this type of motor rotates as well, so it is impossible to fix the motor to the equipment through the housing. It can only be fixed through the tail base. This connection method will cause insufficient torque when encountering high torque. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] An embedded stator and rotor of a low-voltage servo motor includes a motor body composed of a housing, a rear end cover and a stator and rotor, wherein the stator and rotor include a stator assembly and a rotor assembly;

[0006] The stator assembly consists of several sets of coil windings disposed in the housing. Each coil winding includes a bracket and several sets of iron plates that are fastened to the bracket. The several sets of iron plates are stacked to form a stator core. Several turns of copper wire are wound around the stator core to form a coil winding.

[0007] The rotor assembly includes a rotor core formed by stacking several iron rings and magnetic elements. The rotor core has several cavities in the middle, and the cavities are arranged circumferentially around the iron rings. The magnetic elements are fixed in the cavities. The rotor assembly also includes a rotating shaft, which is fixed in the middle of the rotor core.

[0008] Furthermore, a groove is provided on one side of the iron sheet, and a protrusion matching the groove is provided at the end away from the groove. The protrusion of one set of patches engages with the groove of the next set of patches to form a circumferential shape connected end to end. The middle part of the iron sheet is recessed inward to form a narrow waist, which is used to engage the bracket.

[0009] Furthermore, the angle between the two sets of cavities on the iron ring is denoted as θ, and the value of the angle θ is 30-60°.

[0010] Furthermore, the magnetic element is a magnet.

[0011] Furthermore, the rotating shaft is also fixed with a first gear element, and a second gear element is rotatably connected inside the housing, the second gear element meshing with the first gear element.

[0012] Furthermore, the second gear element is an internal gear, and the first gear element is an external gear, and the first gear element can mesh with the second gear element to rotate together.

[0013] Furthermore, the housing is provided with a boss, the stator is locked at the upper limit of the boss, and the housing is also provided with at least two sets of bearings, and the rotating shaft is provided to rotate within the bearings.

[0014] The beneficial effects of this utility model are:

[0015] This invention fixes the stator coil inside the housing, then places the rotor inside the coil, inserts a magnet into the rotor, and places the magnet part on the rotating shaft. At this time, the rotating shaft and the magnet can rotate inside the housing, thus eliminating the need for brushes and ensuring that the housing does not rotate. The output shaft is still the rotating shaft in the middle of the motor. By embedding the stator and rotor, this invention ensures that the rotating shaft of the permanent magnet motor rotates without affecting the housing. The motor can be fixed using the housing, which is convenient for fixed connection. At the same time, this structure can also be matched with low-voltage servo to generate large torque force. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a half-sectional schematic diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the stator and rotor of this practical instrument;

[0019] Figure 4 This is a schematic diagram of the interior of the casing of this utility model;

[0020] Figure 5 This is a schematic diagram of the rotating shaft of this utility model;

[0021] Figure 6This is a schematic diagram of the rotor of this utility model;

[0022] Figure 7 This is a schematic diagram of the stator of this utility model;

[0023] Figure 8 This is a schematic diagram of the iron sheet of this utility model;

[0024] Figure 9 This is a schematic diagram of the iron ring of this utility model;

[0025] The parts in the attached diagram are labeled as follows:

[0026] 1. Housing; 11. Boss; 2. Stator and rotor; 21. Stator assembly; 211. Bracket; 212. Iron sheet;

[0027] 212-1, Groove; 212-2, Protrusion; 212-3, Narrow Waist; 213, Copper Wire; 22, Rotor Assembly;

[0028] 221. Iron ring; 222. Magnetic element; 223. Cavity; 224. Rotating shaft; 225. First gear element; 226. Second gear element; 3. Rear end cover. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0030] Example:

[0031] like Figures 1 to 9 As shown, an embedded stator and rotor of a low-voltage servo motor includes a motor body composed of a housing 1, a rear end cover 3, and a stator and rotor 2. The stator and rotor 2 includes a stator assembly 21 and a rotor assembly 22. A boss 11 is provided inside the housing 1, and the coil winding is locked at the upper limit of the boss 11. At least two sets of bearings 12 are also provided inside the housing, and the rotating shaft 224 is disposed in the bearings 12 and rotates.

[0032] The stator assembly 21 is composed of several sets of coil windings disposed in the housing 1. The coil windings include a bracket 211 and several sets of iron plates 212 that are engaged on the bracket 211. Several sets of iron plates 212 are stacked to form a stator core. Several turns of copper wire 213 are wound around the stator core to form coil windings.

[0033] The rotor assembly 22 includes a rotor core formed by stacking several iron rings 221 and a magnetic element 222. The rotor core has several cavities 223 arranged circumferentially around the iron rings. The magnetic element 222 is fixed within each cavity 223. The rotor assembly 22 also includes a rotating shaft 224 fixed to the center of the rotor core. Specifically, the angle between two sets of cavities 223 on the iron rings 221 is denoted as θ, and the value of angle θ is 30-60°. The magnetic element 222 is a magnet. A first gear element 225 is also fixed to the rotating shaft 224. A second gear element 226 is provided inside the machine 1, and the second gear element 226 meshes with the first gear element 225. The second gear element 32 is an internal gear, and the first gear element 31 is an external gear; the first gear element 31 can mesh with the second gear element 32 to rotate together.

[0034] The iron sheet 212 has a groove 212-1 on one side and a protrusion 212-2 that matches the groove 212-1 at the other end away from the groove 212-1. The protrusion 212-2 of one set of patches engages with the groove 212-1 of the next set of patches to form a circumferential shape connected end to end. The middle part of the iron sheet 212 is recessed inward to form a narrow waist 212-3, which is used to engage the bracket 211.

[0035] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A low-voltage servo motor embedded stator and rotor, comprising a motor body composed of a casing (1), a rear end cover (3) and a stator and rotor (2), the stator and rotor (2) comprising a stator assembly (21) and a rotor assembly (22), characterized in that: the stator assembly (21) is composed of a plurality of groups of coil windings arranged in the casing (1), the coil windings comprising a bracket (211) and a plurality of groups of iron sheets (212) clamped on the bracket (211), the plurality of groups of iron sheets (212) being stacked to form a stator core, and a plurality of turns of copper wire (213) being wound on the stator core to form the coil windings; the rotor assembly (22) comprises a rotor core composed of a plurality of iron rings (221) stacked together and a magnetic element (222), the rotor core having a plurality of cavities (223) arranged in a circle around the middle of the rotor core, the magnetic element (222) being fixed in the cavities (223), and the rotor assembly (22) further comprising a rotating shaft (224) fixed in the middle of the rotor core. One side of the iron sheet (212) is provided with a groove (212-1), and the end away from the groove (212-1) is provided with a protrusion (212-2) matching the groove (212-1), the protrusions (212-2) of one group of patches are clamped with the grooves (212-1) of the next group of patches to form a circumferential type connected in a circle, the middle part of the iron sheet (212) is inwardly recessed to form a narrow waist (212-3), and the narrow waist (212-3) is used to clamp the bracket (211). The angle between the two groups of cavities (223) on the iron ring (221) is denoted as θ, and the value of the angle θ is 30-60°.

2. An embedded stator-rotor for a low voltage servo motor according to claim 1, characterized in that: The magnetic element (222) is a magnet.

3. The low voltage servo motor embedded stator and rotor of claim 1, wherein: The rotating shaft (224) is further fixed with a first gear element (225), the casing (1) is provided with a second gear element (226), and the second gear element (226) is engaged with the first gear element (225).

4. The low voltage servo motor embedded stator and rotor of claim 1, wherein: The second gear element (226) is an internal gear, the first gear element (225) is an external gear, and the first gear element (225) can rotate together with the second gear element (226).

5. The low voltage servo motor embedded stator and rotor of claim 1, wherein:

7. The low-voltage servo motor embedded stator and rotor according to claim 1, characterized in that: a boss (11) is arranged in the casing (1), the coil windings are clamped on the boss (11) to limit the position, and at least two bearings (12) are arranged in the casing (1), and the rotating shaft (224) is arranged in the bearings (12) to rotate.

6. An embedded stator-rotor for a low voltage servo motor according to claim 5, characterized in that: ​ ​ ​

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