A servo motor stator assembly and servo motor thereof

Abstract

The invention discloses a servo motor stator assembly and a servo motor thereof, which relate to the technical field of servo motors, and comprise a stator core, wherein an assembly plate is arranged at one end of the stator core, a limiting stopper is fixedly connected to an outer wall of one side of the assembly plate, the limiting stopper is distributed in an equidistant circle on an outer wall of one side of the assembly plate, a limiting groove is arranged on the circumferential outer wall of the stator core, the limiting stopper cooperates with the limiting groove, the stator core comprises a plurality of groups of stator punching sheets stacked on each other, a winding groove is arranged at one end of the stator core, an epoxy glue encapsulation layer is encapsulated on the circumferential outer wall of the stator core, the limiting stopper and the assembly plate are fixedly connected to the stator core through the epoxy glue encapsulation layer, and the invention can make the winding coils evenly distributed in the winding grooves of the stator core, and avoid the situation that the winding coils in a local area in the winding grooves are too dense, resulting in thermal breakdown of the motor winding.

Description

Technical Field

[0001] The present invention relates to the technical field of servo motors, and in particular to a servo motor stator assembly and a servo motor thereof. Background Art

[0002] A servo motor is an engine that controls the operation of mechanical components in a servo system. The servo motor can control speed and position with high accuracy, and can convert voltage signals into torque and speed to drive the controlled object. The rotor speed of the servo motor is controlled by the input signal and can respond quickly. In the automatic control system, it is used as an actuator and has the characteristics of small electromechanical time constant and high linearity. It can convert the received electrical signal into angular displacement or angular velocity output on the motor shaft. It is divided into two categories: DC and AC servo motors. Its main characteristics are that there is no self-rotation when the signal voltage is zero, and the speed decreases uniformly with the increase of torque.

[0003] After searching, the Chinese patent with the announcement number "CN216290368U" discloses a servo motor stator assembly and a servo motor, including a ring body, an inner tube, a plurality of stator teeth, a fixing groove, a fixing part, a through hole, a pressure rod, an arc surface, a limit groove, a shaft rod, an extrusion ring and an extrusion part. The above device can synchronously fix a plurality of stator teeth in a ring structure through the inner tube, and can synchronously move them to the outside along the positioning groove, so that the stator teeth are fixed and the positioning teeth are opened at the same time, which facilitates winding, ensures the distance between the stator teeth, and avoids confusion of the stator teeth.

[0004] Based on the prior art, the above device still has the following deficiencies: when the stator assembly is winding the coil, the coil is easily concentrated on the outer wall of the stator teeth, resulting in the situation that the winding coil is too dense in the local area of ​​the stator teeth, which leads to an increase in the current per unit cross-sectional area of ​​the winding coil (i.e., the current density). In this case, the temperature rise of the servo motor is likely to increase significantly. Excessive temperature rise will not only accelerate the aging of the motor insulation material, but also may cause thermal breakdown of the motor winding, thereby affecting the life and reliability of the motor. Therefore, a servo motor stator assembly and a servo motor thereof are urgently needed to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and propose a servo motor stator assembly and a servo motor thereof. The advantages of the present invention are that the winding coils can be evenly distributed in the winding slots of the stator core, avoiding the situation that the winding coils in the local area of ​​the winding slots are too dense, resulting in thermal breakdown of the motor winding, and effectively extending the service life of the servo motor.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A servo motor stator assembly comprises a stator core, one end of the stator core is provided with a mounting plate, one side outer wall of the mounting plate is fixedly connected to a limit stopper rod, the limit stopper rods are distributed in a circular shape with equal distances on one side outer wall of the mounting plate, the circumferential outer wall of the stator core is provided with a limit slot, and the limit stopper rods cooperate with the limit slots;

[0008] The stator core comprises a plurality of groups of stator punching sheets stacked on each other, a winding slot is provided at one end of the stator core, an epoxy glue packaging layer is packaged on the circumferential outer wall of the stator core, and the limit stop rod and the assembly plate are fixedly connected to the stator core through the epoxy glue packaging layer.

[0009] Through the above technical solution: the winding coils can be evenly distributed in the winding slots of the stator core, avoiding the situation where the winding coils in local areas of the winding slots are too dense, resulting in thermal breakdown of the motor windings, and effectively extending the service life of the servo motor.

[0010] The present invention is further configured such that the inner walls on both sides of the winding slot are provided with a first protrusion and a second protrusion, the first protrusion is located above the second protrusion, and the angles between the first protrusion, the second protrusion and the inner walls on both sides of the winding slot are both 50°-60°.

[0011] Through the above technical scheme: the first protrusion and the second protrusion are respectively arranged in the winding slot opened in the stator core, which can effectively divide the winding slot, so that the subsequent winding coils can be evenly distributed on both sides of the first protrusion and the second protrusion, avoiding the situation that the winding coils in the local area in the winding slot are too dense, resulting in thermal breakdown of the motor winding, effectively extending the service life of the servo motor, and the angles between the first protrusion and the second protrusion and the inner walls on both sides of the winding slot are 50°-60°, thereby effectively avoiding the winding coil from slipping out and falling off from the first protrusion or the second protrusion, thereby ensuring the stability of the winding coil after winding.

[0012] The present invention is further configured such that a spiral groove is provided on the outer wall of the stator core end, the cross section of the spiral groove is T-shaped, and the spiral groove is connected to the limit groove.

[0013] Through the above technical scheme: the spiral groove opened on the circumferential outer wall of the stator core allows the epoxy glue encapsulation layer to penetrate into it, thereby ensuring the stability of the subsequent connection between the stator core and the motor. At the same time, since the cross-section of the spiral groove is T-shaped, the epoxy glue encapsulation layer can be effectively penetrated into the spiral groove both horizontally and vertically. At the same time, due to its unique spiral structure, the spiral groove can extend the penetration path of the epoxy glue encapsulation layer, thereby further improving the tightness of the connection between the epoxy glue encapsulation layer and the stator core.

[0014] The present invention is further configured such that the limit stop rod includes a rod portion and a cylindrical portion, the cylindrical portion cooperates with the limit groove, the outer walls on both sides of the rod portion are rectangular grooves, the rectangular grooves are distributed at equal distances on the outer walls on both sides of the rod portion, and the epoxy glue encapsulation layer extends into the interior of the rectangular groove and the spiral groove.

[0015] Through the above technical solution: it can be effectively ensured that the epoxy glue packaging layer can quickly penetrate into the interior of the rectangular groove, thereby achieving a further reinforcement effect on the limit stop bar.

[0016] The present invention is further configured such that both ends of the stator punching sheets are provided with Z-shaped slots, and the two groups of the stator punching sheets are matched with each other through the Z-shaped slots.

[0017] Through the above technical solution: when multiple groups of stator punching sheets in the stator core are stacked and matched, since Z-shaped grooves are provided at both ends of the stator punching sheets, a locking force in the circumferential direction can be generated at the ends when two groups of stator punching sheets are matched.

[0018] The present invention is further configured such that the outer walls on both sides of the Z-shaped groove are respectively provided with grooves and protrusions, the grooves are clamped with the protrusions, and the protrusions at the ends of one group of stator punching sheets are clamped in the grooves at the ends of another group of stator punching sheets.

[0019] Through the above technical solution: the protrusions and grooves on one side of the Z-shaped slot can make the two groups of stator punching sheets fit more closely, improve the compactness of the stator core, and at the same time make it easier to ensure the roundness of the inner diameter of the stator core, so that it can better fit the motor rotor, thereby reducing magnetic circuit defects and improving the overall working efficiency of the motor.

[0020] A servo motor comprises a servo motor stator assembly and a casing, wherein the assembly plate is fixedly connected to the circumferential inner wall of the casing, the stator core and the limit stop lever are both encapsulated on the circumferential inner wall of the casing through the epoxy glue encapsulation layer, an output shaft is arranged inside the casing, a rotor is fixedly connected to the circumferential outer wall of the output shaft, the stator core is arranged outside the rotor, a rear shell is arranged at one end of the casing, an encoder is fixedly connected to the interior of the rear shell, a circuit board is fixedly connected to one side outer wall of the encoder, an installation groove is provided at one end of the encoder away from the circuit board, a bearing is fixedly connected to the interior of the installation groove, one end of the output shaft extending to the interior of the rear shell is fixedly connected to the bearing, a docking interface is provided on the circumferential outer wall of the rear shell, the docking interface is electrically connected to the circuit board, and a locking assembly is provided inside the rear shell.

[0021] Through the above technical solution: when the motor is working, current is passed through the winding coil, and magnetic force is generated around the stator core, which can repel the permanent magnet in the rotor and cause it to rotate. During the rotation of the permanent magnet, the output shaft can be driven to rotate together, completing the starting work of the motor.

[0022] The present invention is further configured such that one end of the casing is fixedly connected to an end cover by bolts, one end of the end cover away from the casing is connected to a stabilizing plate by bolts, and one end of the output shaft passes through one side of the end cover and the stabilizing plate.

[0023] Through the above technical solution: through the joint action of the end cover and the stabilizing plate, the continuous and stable rotation of the output shaft can be ensured.

[0024] The present invention is further configured as follows: the locking assembly includes a circular plate fixedly connected to the inner wall of the rear shell body, an annular partition is fixedly connected to the outer wall of one side of the circular plate, an iron core block is fixedly connected to the outer wall of one side of the circular plate, the circumferential inner wall of the iron core block is in contact with the circumferential outer wall of the annular partition, a conductive coil is wound around the circumferential outer wall of the iron core block, the circular plate and the circumferential inner wall of the rear shell body are surrounded by a movable groove, a first friction plate is fixedly connected to the inner wall of one side of the movable groove, the first friction plate is fixedly connected to the circumferential outer wall of the output shaft, a friction disc and a second friction plate are arranged inside the movable groove, the friction disc is arranged in the middle of the first friction plate and the second friction plate, and the second friction plate is fixedly connected to a ring iron block on the side away from the friction disc.

[0025] Through the above technical solution: when the motor stops working, the current disappears instantly, and the current in the conductive coil on the outer wall of the core block will also disappear instantly. When the current in the conductive coil disappears, no magnetic force will be generated around the core block, so that the core block will no longer have an attractive force on the ring iron block.

[0026] The present invention is further configured such that a circular groove is opened inside the rear shell body, the circular grooves are distributed in a circular shape with equal distances inside the rear shell body, the circular grooves are connected to the movable groove, a spring is fixedly connected to an inner wall of one side of the circular groove, and one end of the spring away from the inner part of the circular groove is fixedly connected to an outer wall of one side of the ring iron block.

[0027] Through the above technical scheme: when the iron core block no longer attracts the ring iron block, the ring iron block that is approaching it through the magnetic attraction of the iron core block will be quickly reset by the elastic force of the spring. When the ring iron block is reset, it can drive the second friction plate to move in the direction close to the friction disk until the second friction plate is pressed against the outer wall of the friction disk. At this time, the output shaft can be instantly locked by the squeezing effect between the second friction plate, the first friction plate and the friction disk, which can maintain the stability of the motor in the parking state and avoid the wear of the mechanical equipment during long-term static operation. At the same time, in the event of emergency shutdown or power failure, the motor brake can stop the motor instantly to prevent the equipment from continuing to move due to inertia and causing danger.

[0028] The beneficial effects of the present invention are:

[0029] 1. In the present invention, the winding slot, the first protrusion and the second protrusion are provided to effectively divide the winding slot, so that the subsequent winding coils can be evenly distributed on both sides of the first protrusion and the second protrusion, thereby avoiding the situation that the winding coils in the local area in the winding slot are too dense, resulting in thermal breakdown of the motor winding, and effectively extending the service life of the servo motor. The angles between the first protrusion and the second protrusion and the inner walls on both sides of the winding slot are 50°-60°, thereby effectively avoiding the situation that the winding coils slip out of the first protrusion or the second protrusion and fall off, and ensuring the stability of the winding coils after winding;

[0030] 2. In the present invention, the spiral groove formed on the outer circumferential wall of the stator core allows the epoxy glue encapsulation layer to penetrate therein, thereby ensuring the stability of the subsequent connection between the stator core and the motor. At the same time, since the cross section of the spiral groove is T-shaped, the epoxy glue encapsulation layer can be effectively penetrated into the spiral groove in both the horizontal and vertical directions. At the same time, due to its unique spiral structure, the spiral groove can extend the penetration path of the epoxy glue encapsulation layer, thereby further improving the tightness of the connection between the epoxy glue encapsulation layer and the stator core.

[0031] 3. In the present invention, when multiple groups of stator punching sheets in the stator core are stacked and matched, since Z-shaped grooves are provided at both ends of the stator punching sheets, a locking force in the circumferential direction can be generated at the ends when the two groups of stator punching sheets are matched, and the protrusions and grooves on one side of the Z-shaped grooves can make the two groups of stator punching sheets match more closely, thereby improving the compactness of the stator core and making it easier to ensure the roundness of the inner diameter of the stator core, so that it can better match the motor rotor, thereby reducing magnetic circuit defects and improving the overall working efficiency of the motor;

[0032] 4. The present invention can achieve instantaneous brake locking of the output shaft, which can maintain the stability of the motor in the parking state and avoid the wear of the mechanical equipment during long-term static operation. At the same time, in the event of emergency shutdown or power failure, the motor brake can stop the motor instantly to prevent the equipment from continuing to move due to inertia and causing danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A servo motor stator assembly and a schematic diagram of the overall structure of the servo motor stator assembly proposed by the present invention;

[0034] Figure 2 A servo motor stator assembly and a schematic diagram of the disassembled structure of the servo motor stator assembly proposed by the present invention;

[0035] Figure 3 A servo motor stator assembly and servo motor thereof proposed by the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0036] Figure 4 A servo motor stator assembly and servo motor thereof proposed by the present invention Figure 2 A schematic diagram of the enlarged structure at B in the middle;

[0037] Figure 5 A schematic diagram of a half-section structure of a servo motor stator assembly and an epoxy adhesive packaging layer of the servo motor proposed by the present invention;

[0038] Figure 6 A schematic diagram of the matching structure of two groups of stator punching sheets of a servo motor stator assembly and a servo motor thereof proposed by the present invention;

[0039] Figure 7 A servo motor stator assembly and a schematic diagram of the split structure of two groups of stator punching sheets of the servo motor proposed by the present invention;

[0040] Figure 8 A schematic diagram of the overall structure of a servo motor stator assembly and a servo motor thereof proposed by the present invention;

[0041] Fig. 9 A schematic structural diagram of a servo motor stator assembly and a servo motor thereof proposed by the present invention;

[0042] Fig.10 A schematic diagram of a servo motor stator assembly and a motor split structure of a servo motor thereof proposed by the present invention;

[0043] Fig.11 The present invention provides a servo motor stator assembly and a schematic diagram of the half-section planar structure of the rear housing of the servo motor.

[0044] In the figure: 1, stator core; 2, epoxy encapsulation layer; 3, assembly plate; 4, limit stop rod; 4001, rod part; 4002, cylindrical part; 4003, rectangular groove; 5, winding groove; 6, first protrusion; 7, second protrusion; 8, spiral groove; 9, limit groove; 10, Z-shaped groove; 11, groove; 12, bump; 13, stabilizing plate; 14, output shaft; 15, end cover; 16, casing; 17, rear casing; 18, docking port; 19, rotor; 20, first friction plate; 21, spring; 22, friction disc; 23, second friction plate; 24, ring iron block; 25, core block; 26, conductor coil; 27, encoder; 28, circuit board; 29, mounting groove; 30, bearing; 31, circular groove; 32, movable groove; 33, annular partition; 34, stator punching sheet. DETAILED DESCRIPTION

[0045] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0046] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] Reference Figure 1-Figure 7 A servo motor stator assembly includes a stator core 1, an assembly plate 3 is provided at one end of the stator core 1, a limit stopper 4 is fixedly connected to an outer wall of one side of the assembly plate 3, the limit stopper 4 is distributed in an equidistant circle on an outer wall of one side of the assembly plate 3, a limit slot 9 is provided on the circumferential outer wall of the stator core 1, and the limit stopper 4 cooperates with the limit slot 9;

[0048] The stator core 1 includes a plurality of groups of stator punching sheets 34 stacked on each other, a winding slot 5 is opened at one end of the stator core 1, the circumferential outer wall of the stator core 1 is encapsulated with an epoxy glue encapsulation layer 2, and the limit lever 4 and the assembly plate 3 are fixedly connected to the stator core 1 through the epoxy glue encapsulation layer 2, so that the winding coils can be evenly distributed in the winding slots 5 of the stator core 1, avoiding the situation that the winding coils in the local area of ​​the winding slots 5 are too dense, resulting in thermal breakdown of the motor winding, and effectively extending the service life of the servo motor.

[0049] In order to make the winding coils evenly distributed on the outer wall of the winding slot 5, refer to Figure 1-Figure 3The inner walls on both sides of the winding slot 5 are provided with a first protrusion 6 and a second protrusion 7, the first protrusion 6 is located above the second protrusion 7, and the angles between the first protrusion 6, the second protrusion 7 and the inner walls on both sides of the winding slot 5 are both 50°-60°. The first protrusion 6 and the second protrusion 7 are respectively provided in the winding slot 5 opened in the stator core 1, which can effectively divide the winding slot 5, so that the subsequent winding coils can be evenly distributed on both sides of the first protrusion 6 and the second protrusion 7, avoiding the occurrence of excessive density of winding coils in local areas of the winding slot 5, resulting in thermal breakdown of the motor winding, effectively extending the service life of the servo motor, and the angles between the first protrusion 6 and the second protrusion 7 and the inner walls on both sides of the winding slot 5 are both 50°-60°, so that the winding coil can be effectively prevented from slipping out and falling off from the first protrusion 6 or the second protrusion 7, thereby ensuring the stability of the winding coil after winding.

[0050] In order to make the epoxy glue packaging layer 2 and the stator core 1 tightly connected, refer to Figure 2-Figure 3 A spiral groove 8 is provided on the outer wall of the end of the stator core 1. The cross section of the spiral groove 8 is T-shaped. The spiral groove 8 is connected to the limiting groove 9. The spiral groove 8 provided on the circumferential outer wall of the stator core 1 allows the epoxy glue encapsulation layer 2 to penetrate therein, thereby ensuring the stability of the subsequent connection between the stator core 1 and the motor. At the same time, since the cross section of the spiral groove 8 is T-shaped, the epoxy glue encapsulation layer 2 can be effectively penetrated in the spiral groove 8 both horizontally and vertically. At the same time, due to its unique spiral structure, the spiral groove 8 can extend the penetration path of the epoxy glue encapsulation layer 2, thereby further improving the tightness of the connection between the epoxy glue encapsulation layer 2 and the stator core 1.

[0051] In order to ensure the stability of the stator core 1 during installation and stacking, refer to Figure 2 , Figure 4 The limiting stop rod 4 includes a rod portion 4001 and a cylindrical portion 4002, the cylindrical portion 4002 cooperates with the limiting groove 9, the outer walls on both sides of the rod portion 4001 are rectangular grooves 4003, and the rectangular grooves 4003 are equidistantly distributed on the outer walls on both sides of the rod portion 4001, and the epoxy glue encapsulation layer 2 extends into the interior of the rectangular groove 4003 and the spiral groove 8. By opening the rectangular grooves 4003 on the outer walls on both sides of the rod portion 4001, it can effectively ensure that the epoxy glue encapsulation layer 2 can quickly penetrate into the interior of the rectangular groove 4003, thereby achieving further reinforcement of the limiting stop rod 4.

[0052] In order to achieve rapid matching between the two sets of stator punching sheets 34, refer to Figure 6-Figure 7 Both ends of the stator punching sheet 34 are provided with a Z-shaped slot 10, and the two groups of stator punching sheets 34 are matched with each other through the Z-shaped slot 10. When multiple groups of stator punching sheets 34 in the stator core 1 are stacked and matched, since both ends of the stator punching sheet 34 are provided with a Z-shaped slot 10, a locking force in the circumferential direction can be generated at the end when the two groups of stator punching sheets 34 are matched.

[0053] In order to ensure the roundness of the inner diameter of the entire stator core 1, refer to Figure 6-Figure 7 The outer walls on both sides of the Z-shaped groove 10 are respectively provided with grooves 11 and protrusions 12, and the grooves 11 are clamped with the protrusions 12. The protrusions 12 at the ends of one group of stator punching sheets 34 are clamped in the grooves 11 at the ends of another stator punching sheet 34. The protrusions 12 and grooves 11 on one side of the Z-shaped groove 10 can make the two groups of stator punching sheets 34 fit more closely, thereby improving the compactness of the stator core 1 and making it easier to ensure the roundness of the inner diameter of the stator core 1, so that it can better fit the motor rotor 19, thereby reducing magnetic circuit defects and improving the overall working efficiency of the motor.

[0054] Working principle: The winding slot 5 opened in the stator core 1 is respectively provided with a first protrusion 6 and a second protrusion 7, which can effectively divide the winding slot 5, so that the subsequent winding coils can be evenly distributed on both sides of the first protrusion 6 and the second protrusion 7, avoiding the situation that the winding coils in the local area in the winding slot 5 are too dense, resulting in thermal breakdown of the motor winding, effectively extending the service life of the servo motor, and the angles between the first protrusion 6 and the second protrusion 7 and the inner walls on both sides of the winding slot 5 are 50°-60°, thereby effectively preventing the winding coils from slipping out and falling off from the first protrusion 6 or the second protrusion 7, ensuring the stability of the winding coils after winding, and at the same time, the spiral groove 8 opened on the circumferential outer wall of the stator core 1 allows the epoxy glue encapsulation layer 2 to penetrate into it, ensuring the stability of the subsequent connection between the stator core 1 and the motor, and at the same time, due to the spiral groove 8 The cross-section is T-shaped, so that the epoxy glue encapsulation layer 2 can be effectively penetrated in the spiral groove 8 both horizontally and vertically. At the same time, due to its unique spiral structure, the spiral groove 8 can extend the penetration path of the epoxy glue encapsulation layer 2, thereby further improving the tightness of the connection between the epoxy glue encapsulation layer 2 and the stator core 1. When multiple groups of stator punching sheets 34 in the stator core 1 are stacked and matched, since Z-shaped grooves 10 are provided at both ends of the stator punching sheets 34, a circumferential locking force can be generated at the ends when the two groups of stator punching sheets 34 are matched. The protrusion 12 and the groove 11 on one side of the Z-shaped groove 10 can make the two groups of stator punching sheets 34 match more closely, thereby improving the compactness of the stator core 1 and making it easier to ensure the roundness of the inner diameter of the stator core 1, so that it can better match the motor rotor 19, thereby reducing magnetic circuit defects and improving the overall working efficiency of the motor.

[0055] Reference Figure 8-Figure 11A servo motor includes a servo motor stator assembly, and also includes a housing 16, an assembly plate 3 is fixedly connected to the circumferential inner wall of the housing 16, a stator core 1 and a limit stopper rod 4 are both encapsulated on the circumferential inner wall of the housing 16 through an epoxy encapsulation layer 2, an output shaft 14 is arranged inside the housing 16, a rotor 19 is fixedly connected to the circumferential outer wall of the output shaft 14, the stator core 1 is arranged outside the rotor 19, a rear housing 17 is arranged at one end of the housing 16, an encoder 27 is fixedly connected to the interior of the rear housing 17, a circuit board 28 is fixedly connected to one side outer wall of the encoder 27, and the encoder 27 is away from the circuit board 28 A mounting groove 29 is provided at one end, and a bearing 30 is fixedly connected inside the mounting groove 29. One end of the output shaft 14 extending to the inside of the rear housing 17 is fixedly connected to the bearing 30. A docking port 18 is provided on the circumferential outer wall of the rear housing 17. The docking port 18 is electrically connected to the circuit board 28. A locking assembly is provided inside the rear housing 17. When the motor is working, current is passed through the winding coil. At this time, magnetic force is generated around the stator core 1, which can repel the permanent magnet in the rotor 19 to make it rotate. During the rotation of the permanent magnet, the output shaft 14 can be driven to rotate together, thereby completing the starting work of the motor.

[0056] In order to ensure that the output shaft 14 can rotate stably, refer to Figure 8-Figure 9 One end of the casing 16 is fixedly connected to the end cover 15 by bolts, and the end of the end cover 15 away from the casing 16 is connected to the stabilizing plate 13 by bolts. One end of the output shaft 14 passes through one side of the end cover 15 and the stabilizing plate 13. Through the joint action of the end cover 15 and the stabilizing plate 13, the output shaft 14 can be guaranteed to rotate continuously and stably.

[0057] To achieve the parking brake of the motor output shaft 14, refer to Figure 9-11The locking assembly includes a circular plate fixedly connected to the inner wall of the rear housing 17, an annular partition 33 is fixedly connected to one side outer wall of the circular plate, an iron core block 25 is fixedly connected to one side outer wall of the circular plate, the circumferential inner wall of the iron core block 25 contacts the circumferential outer wall of the annular partition 33, a conductive coil 26 is wound around the circumferential outer wall of the iron core block 25, a movable groove 32 is surrounded by the circumferential inner wall of the circular plate and the rear housing 17, a first friction plate 20 is fixedly connected to one side inner wall of the movable groove 32, and the first friction plate 20 is fixedly connected to the output shaft 1 4, a friction plate 22 and a second friction plate 23 are arranged inside the movable groove 32, the friction plate 22 is arranged in the middle of the first friction plate 20 and the second friction plate 23, and a ring iron block 24 is fixedly connected to the side of the second friction plate 23 away from the friction plate 22, and a circular groove 31 is opened inside the rear housing 17, and the circular grooves 31 are distributed in an equidistant circle inside the rear housing 17, and the circular grooves 31 are connected to the movable groove 32, and a spring 21 is fixedly connected to the inner wall of one side of the circular groove 31, and the spring 21 is away from the friction plate 22. One end of the inner part of the circular groove 31 is fixedly connected to the outer wall of one side of the ring iron block 24. When the motor stops working, the current disappears instantly. At this time, the current in the conductive coil 26 on the outer wall of the circumference of the core block 25 will also disappear instantly. When the current in the conductive coil 26 disappears, no magnetic force will be generated around the core block 25. At this time, the ring iron block 24 approaching it through the magnetic attraction of the core block 25 will be quickly reset by the elastic force of the spring 21. When the ring iron block 24 is reset, it can drive the second friction plate 23 to move in the direction close to the friction disk 22 until the second friction plate 23 is pressed against the outer wall of the friction disk 22. At this time, through the squeezing effect between the second friction plate 23, the first friction plate 20 and the friction disk 22, the output shaft 14 can be instantly locked by the brake, which can maintain the stability of the motor in the parking state and avoid the wear of the mechanical equipment during long-term static operation. At the same time, in the case of emergency shutdown or power failure, the motor brake can stop the motor instantly to prevent the equipment from continuing to move due to inertia and causing danger.

[0058] Working principle: When the motor is working, current is passed through the winding coil, and magnetic force is generated around the stator core 1, which can repel each other with the permanent magnet in the rotor 19 to make it rotate. During the rotation of the permanent magnet, the output shaft 14 can be driven to rotate together. When the motor stops working, the current disappears instantly, and the current in the coil 26 on the outer wall of the circumference of the core block 25 will also disappear instantly. When the current in the coil 26 disappears, no magnetic force will be generated around the core block 25. At this time, the ring iron block 24 approaching it through the magnetic attraction of the core block 25 will be attracted by the elastic force of the spring 21. Quick reset. When the ring iron block 24 is reset, it can drive the second friction plate 23 to move towards the direction close to the friction disk 22 until the second friction plate 23 is pressed against the outer wall of the friction disk 22. At this time, through the squeezing effect between the second friction plate 23, the first friction plate 20 and the friction disk 22, the output shaft 14 can be instantly locked by the brake, which can maintain the stability of the motor in the parking state and avoid the wear of the mechanical equipment during long-term static operation. At the same time, in the event of emergency shutdown or power failure, the motor brake can stop the motor instantly to prevent the equipment from continuing to move due to inertia and causing danger.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A servo motor stator assembly, comprising a stator core (1), characterized in that: An assembly plate (3) is provided at one end of the stator core (1); a limit stopper rod (4) is fixedly connected to an outer wall of one side of the assembly plate (3); the limit stopper rods (4) are distributed in a circular shape with equal distances on an outer wall of one side of the assembly plate (3); a limit slot (9) is provided on the circumferential outer wall of the stator core (1); the limit stopper rods (4) cooperate with the limit slot (9); The stator core (1) comprises a plurality of groups of mutually stacked stator punching sheets (34), one end of the stator core (1) is provided with a winding slot (5), the circumferential outer wall of the stator core (1) is encapsulated with an epoxy glue encapsulation layer (2), and the limit stop rod (4) and the assembly plate (3) are fixedly connected to the stator core (1) via the epoxy glue encapsulation layer (2).

2. A servo motor stator assembly according to claim 1, characterized in that: The inner walls on both sides of the winding slot (5) are provided with a first protrusion (6) and a second protrusion (7); the first protrusion (6) is located above the second protrusion (7); and the angles between the first protrusion (6), the second protrusion (7) and the inner walls on both sides of the winding slot (5) are both 50°-60°.

3. A servo motor stator assembly according to claim 2, characterized in that: The outer wall of the end of the stator core (1) is provided with a spiral groove (8), the cross section of the spiral groove (8) is T-shaped, and the spiral groove (8) is connected to the limiting groove (9).

4. A servo motor stator assembly according to claim 3, characterized in that: The limit stop rod (4) comprises a rod portion (4001) and a cylindrical portion (4002), the cylindrical portion (4002) cooperates with the limit groove (9), both side outer walls of the rod portion (4001) are rectangular grooves (4003), the rectangular grooves (4003) are distributed at equal distances on both side outer walls of the rod portion (4001), and the epoxy glue encapsulation layer (2) extends into the rectangular grooves (4003) and the spiral groove (8).

5. A servo motor stator assembly according to claim 4, characterized in that: Both ends of the stator punching sheet (34) are provided with Z-shaped grooves (10), and two groups of the stator punching sheets (34) are matched with each other through the Z-shaped grooves (10).

6. A servo motor stator assembly according to claim 5, characterized in that: The outer walls on both sides of the Z-shaped groove (10) are respectively provided with a groove (11) and a convex block (12), the groove (11) and the convex block (12) are clamped together, and the convex block (12) at the end of one group of stator punching sheets (34) is clamped in the groove (11) at the end of another group of stator punching sheets (34).

7. A servo motor, comprising a servo motor stator assembly according to claims 1-6, characterized in that: The machine also comprises a casing (16), the assembly plate (3) is fixedly connected to the circumferential inner wall of the casing (16), the stator core (1) and the limit stop rod (4) are both encapsulated on the circumferential inner wall of the casing (16) through the epoxy encapsulation layer (2), an output shaft (14) is arranged inside the casing (16), a rotor (19) is fixedly connected to the circumferential outer wall of the output shaft (14), the stator core (1) is arranged outside the rotor (19), a rear casing (17) is arranged at one end of the casing (16), and a coding The encoder (27) is provided with a circuit board (28) fixedly connected to one side outer wall of the encoder (27); an installation groove (29) is provided at one end of the encoder (27) away from the circuit board (28); a bearing (30) is fixedly connected inside the installation groove (29); one end of the output shaft (14) extending to the inside of the rear housing (17) is fixedly connected to the bearing (30); a docking port (18) is provided on the circumferential outer wall of the rear housing (17); the docking port (18) is electrically connected to the circuit board (28); and a locking assembly is provided inside the rear housing (17).

8. A servo motor according to claim 7, characterized in that: One end of the casing (16) is fixedly connected to an end cover (15) by bolts, and one end of the end cover (15) away from the casing (16) is connected to a stabilizing plate (13) by bolts, and one end of the output shaft (14) passes through one side of the end cover (15) and the stabilizing plate (13).

9. A servo motor according to claim 8, characterized in that: The locking assembly comprises a circular plate fixedly connected to the inner wall of the rear housing (17); an annular partition (33) is fixedly connected to the outer wall of one side of the circular plate; an iron core block (25) is fixedly connected to the outer wall of one side of the circular plate; the circumferential inner wall of the iron core block (25) contacts the circumferential outer wall of the annular partition (33); a conducting coil (26) is wound around the circumferential outer wall of the iron core block (25); a movable groove (32) is surrounded by the circumferential inner wall of the circular plate and the rear housing (17); the movable groove (32) is 2) is fixedly connected to an inner wall of one side thereof with a first friction plate (20), the first friction plate (20) is fixedly connected to the circumferential outer wall of the output shaft (14), a friction disc (22) and a second friction plate (23) are arranged inside the movable groove (32), the friction disc (22) is arranged in the middle of the first friction plate (20) and the second friction plate (23), and a ring iron block (24) is fixedly connected to the side of the second friction plate (23) away from the friction disc (22).

10. A servo motor according to claim 9, characterized in that: The rear shell (17) is provided with circular grooves (31) inside. The circular grooves (31) are distributed in a circular shape at equal distances inside the rear shell (17). The circular grooves (31) are connected to the movable grooves (32). A spring (21) is fixedly connected to an inner wall of one side of the circular groove (31). One end of the spring (21) away from the inside of the circular groove (31) is fixedly connected to an outer wall of one side of the ring iron block (24).

Images