Motor stator special for machine tool

Abstract

The utility model discloses a special motor stator for a machine tool, which comprises a stator iron core, and an insulating coil holder for isolating the stator iron core from a winding is inserted in a slot of the stator iron core; a top plate located at the top of the insulated wire frame is fixedly connected with a bottom plate located at the bottom of the insulated wire frame through a connecting mechanism, and a plurality of protection plates are arranged between the top plate and the bottom plate in an array mode through a mounting mechanism. The top of the top plate is provided with a plurality of filling and sealing openings corresponding to the positions of the insulating wire frames, and the adjacent filling and sealing openings are communicated with each other through communication openings. According to the utility model, through the arrangement of the connecting mechanism, the top plate and the bottom plate can be combined with each other to clamp the protection plate, so that the sealing effect can be achieved, the internal stator core and the insulating coil holder can be sealed, and the erosion of external grease and corrosive liquid can be prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and in particular relates to a special motor stator for machine tools. Background Art

[0002] A motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. The main function of a motor is to generate driving torque as a power source for electrical appliances or various machines.

[0003] When the motor is used in machine tools, due to the harsh operating environment, the machine tool motor will be gradually contaminated during operation. The erosion of grease and corrosive liquids will destroy the insulation performance of the motor stator winding, and the winding cannot be effectively protected. In severe cases, the motor will be burned, which will affect the normal operation of the machine tool and bring safety hazards to the operators. Utility Model Content

[0004] The utility model aims to provide a motor stator for machine tools to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a stator for a motor dedicated to a machine tool, comprising a stator core, wherein:

[0006] Windings are wound in adjacent wire slots of the stator core, and insulating wire frames for isolating the stator core from the windings are inserted in the wire slots of the stator core;

[0007] A top plate located at the top of the insulating wire rack is fixedly connected to a bottom plate located at the bottom of the insulating wire rack through a connecting mechanism, and a plurality of protective plates are arranged between the top plate and the bottom plate through an array of mounting mechanisms;

[0008] The top plate and the bottom plate are provided with fixing mechanisms for fixing the axial and radial positions of the stator core and the insulating wire frame, and the sides of the stator core and the insulating wire frame are provided with limiting mechanisms for limiting the circumferential positions of the stator core and the insulating wire frame;

[0009] A plurality of potting openings are arranged at the top of the top plate corresponding to the positions of the insulating wire racks, and adjacent potting openings are interconnected through connecting openings.

[0010] Preferably, the connecting mechanism includes a plurality of connecting pins arranged in a circular array around the insulating wire frame; the upper cylindrical screw arranged on the top of the top plate passes through the upper connecting hole arranged on the top plate and is detachably connected to the top of the connecting pin, and the lower cylindrical screw arranged on the bottom of the bottom plate passes through the lower connecting hole arranged on the bottom plate and is detachably connected to the bottom of the connecting pin.

[0011] Preferably, the upper cylindrical screw and the lower cylindrical screw can be threadedly connected to the connecting pin and clamp and limit the protective plate, the stator core and the insulating wire frame.

[0012] Preferably, the mounting mechanism includes a mounting column fixed to the bottom of the top plate and a slot hole fixed to the top of the protective plate, and the slot hole and the mounting column are arranged corresponding to each other; the mounting column can be inserted into the slot hole to limit and fix the top of the protective plate.

[0013] Preferably, the mounting mechanism also includes a mounting block fixed to the top of the base plate and a mounting ring arranged on the outer edge of the base plate, and the mounting block and the mounting ring are extended outward from the top of the base plate; the mounting block and the mounting ring are combined to form a mounting groove for accommodating the bottom of the protective plate, and the mounting groove limits and fixes the bottom of the protective plate.

[0014] Preferably, the fixing mechanism includes a fixing block fixed to the bottom of the top plate and the top of the bottom plate, and the fixing block is extended outward from the top of the bottom plate; the fixing block and the fixing rings at both ends of the insulating wire frame are arranged corresponding to each other, and the fixing block and the fixing ring are in contact with each other to fix the axial position of the iron core and the insulating wire frame; the fixing ring is extended outward to be provided with a fixing step, and the fixing step is in contact with the outer wall of the fixing block to fix the radial position of the iron core and the insulating wire frame.

[0015] Preferably, the limiting mechanism includes a limiting groove arranged in a ring on the outer wall of the stator core and the insulating wire frame, and the limiting groove and the connecting pin of the connecting mechanism are arranged corresponding to each other; the connecting pin can be inserted into the limiting groove to limit the circumferential position of the stator core and the insulating wire frame.

[0016] Preferably, a potting cavity is provided between the two ends of the insulating wire rack and the bottom of the top plate and the top of the bottom plate, and the potting cavity and the potting port are interconnected.

[0017] Preferably, the outer surface of the insulating wire rack is covered with a potting layer, and the potting layer wraps the winding and the Hall plate.

[0018] Preferably, the ear arranged on the top of the insulating wire frame engages with the slot arranged on the outer side of the Hall plate, and the top of the insulating wire frame is provided with a Hall slot for accommodating the installation of the Hall element at the bottom of the Hall plate.

[0019] The technical effects and advantages of the utility model are as follows:

[0020] 1. Through the setting of the connection mechanism, the top plate and the bottom plate can be combined with each other to clamp the protective plate, so as to achieve a sealing effect, seal the internal stator core and the insulating wire frame, and prevent the erosion of external grease and corrosive liquids;

[0021] 2. By setting a potting port at a position corresponding to the insulating wire rack on the top plate and interconnecting adjacent potting ports, this structure can provide a dedicated flow channel for epoxy resin when pouring the stator, and complete the potting of epoxy resin without destroying the integrity of the motor stator. In addition, by setting the potting port at the top position, the epoxy resin can be potted from top to bottom in the stator, and normal pressure potting can be used without investing in complex vacuum potting equipment;

[0022] 3. By setting a potting layer to wrap the winding and the Hall plate, the entire motor stator is potted as a whole, which can fully isolate the winding, Hall plate and Hall element from the outside world. Even if pollutants enter the motor, it will not damage the normal operation of the motor. It is very suitable for highly polluted machine tool places. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the utility model;

[0024] Figure 2 It is a schematic diagram of the specific structure of the utility model;

[0025] Figure 3 It is a schematic diagram of the specific structure of the connection mechanism of the utility model;

[0026] Figure 4 This is a schematic diagram of the specific structure of the stator core of the utility model;

[0027] Figure 5 It is a schematic diagram of the specific structure of the insulating wire rack of the utility model;

[0028] Figure 6 It is a schematic diagram of the specific structure of the top plate of the utility model.

[0029] In the figure:

[0030] 1. Stator core; 2. Insulation wire rack; 3. Top plate; 4. Bottom plate; 5. Connection mechanism; 6. Installation mechanism; 7. Fixing mechanism; 8. Limiting mechanism; 9. Protection plate; 10. Potting cavity;

[0031] 11. Wire slot; 12. Winding; 13. Potting layer; 14. Hall plate; 15. Card slot; 16. Hall element;

[0032] 21. Carl; 22. Hall slot;

[0033] 31. Potting port; 32. Connecting port; 33. Upper connecting hole;

[0034] 41. Lower connecting hole;

[0035] 51. Connecting pin; 52. Upper cylindrical screw; 53. Lower cylindrical screw;

[0036] 61. Mounting column; 62. Slot hole; 63. Mounting block; 64. Mounting ring; 65. Mounting groove;

[0037] 71. fixed block; 72. fixed ring; 73. fixed step;

[0038] 81. Limiting groove. DETAILED DESCRIPTION

[0039] The following will be combined with the attached embodiment of the utility model Figure 1-6 , clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0040] The utility model provides Figure 1-Figure 6 A motor stator for machine tools shown in the figure comprises a stator core 1, wherein:

[0041] Windings 12 are wound in adjacent wire slots 11 of the stator core 1, and insulating wire frames 2 for isolating the stator core 1 from the windings 12 are inserted in the wire slots 11 of the stator core 1. By inserting the insulating wire frame 2 into the wire slots 11 of the stator core 1, the insulation performance between the inside of the stator core 1 and the windings 12 can be ensured.

[0042] The top plate 3 located at the top of the insulating wire frame 2 is fixedly connected to the bottom plate 4 located at the bottom of the insulating wire frame 2 through a connecting mechanism 5, and a plurality of protective plates 9 are arranged in an array between the top plate 3 and the bottom plate 4 through a mounting mechanism 6. The protective plates 9 can seal the internal stator core 1 and the insulating wire frame 2 to prevent corrosion by external grease and corrosive liquids.

[0043] Furthermore, by setting up the connecting mechanism 5, the top plate 3 and the bottom plate 4 can be combined with each other to clamp the protective plate 9, so as to achieve a better sealing effect. Moreover, by utilizing the connecting mechanism 5, the top plate 3 and the bottom plate 4 can be quickly installed, which makes the installation simple and convenient for later disassembly and maintenance.

[0044] The top plate 3 and the bottom plate 4 are provided with a fixing mechanism 7 for fixing the axial and radial positions of the stator core 1 and the insulating wire frame 2, and the sides of the stator core 1 and the insulating wire frame 2 are provided with a limiting mechanism 8 for limiting the circumferential position of the stator core 1 and the insulating wire frame 2. By combining the fixing mechanism 7 and the limiting mechanism 8, the position of the internal stator core 1 and the insulating wire frame 2 can be fixed to prevent the stator core 1 and the insulating wire frame 2 from being displaced after long-term operation.

[0045] A plurality of potting ports 31 are provided at the top of the top plate 3 corresponding to the positions of the insulating wire racks 2, and adjacent potting ports 31 are interconnected via connecting ports 32. By providing potting ports 31 at positions corresponding to the insulating wire racks 2 on the top plate 3 and interconnecting adjacent potting ports 31, this structure can provide a dedicated flow channel for epoxy resin when pouring the stator, thereby completing the potting of the epoxy resin without destroying the integrity of the motor stator. Furthermore, by providing the potting ports 31 at the top position, the epoxy resin can be potted from top to bottom in the stator, and normal pressure potting can be used without the need for complex vacuum potting equipment.

[0046] In the present invention, in order to obtain a better potting effect and stabilize the potting quality, vacuum potting equipment can also be used as needed to improve the potting efficiency.

[0047] Specifically, the connecting mechanism 5 includes a plurality of connecting pins 51 arranged in a circular array around the insulating wire frame 2; the connecting pins 51 are used to support and fix the top plate 3 and the bottom plate 4. In the utility model, the number of connecting pins 51 is 4. By using 4 connecting pins 51, the top plate 3 and the bottom plate 4 can be stably supported.

[0048] The upper cylindrical screw 52 arranged on the top of the top plate 3 passes through the upper connecting hole 33 arranged on the top plate 3 and is detachably connected to the top of the connecting pin 51. The upper cylindrical screw 52 can be threadedly connected to the top of the connecting pin 51 and clamp the top plate 3 to limit the position, and the lower cylindrical screw 53 arranged on the bottom of the bottom plate 4 passes through the lower connecting hole 41 arranged on the bottom plate 4 and is detachably connected to the bottom of the connecting pin 51. The lower cylindrical screw 53 can be threadedly connected to the bottom of the connecting pin 51 and clamp the bottom plate 4 to limit the position. By tightening the upper cylindrical screw 52 and the lower cylindrical screw 53, the top plate 3 and the bottom plate 4 are clamped. When disassembly and maintenance are required, the upper cylindrical screw 52 and the lower cylindrical screw 53 can be loosened to separate the upper cylindrical screw 52 and the lower cylindrical screw 53 from the connecting pin 51 to achieve a separation effect.

[0049] Specifically, the upper cylindrical screw 52 and the lower cylindrical screw 53 can be threadedly connected to the connecting pin 51 and clamp and limit the protective plate 9, the stator core 1 and the insulating wire frame 2, so as to achieve the effect of sealing the internal stator core 1 and the insulating wire frame 2.

[0050] Specifically, the mounting mechanism 6 includes a mounting column 61 fixed to the bottom of the top plate 3 and a slot hole 62 fixed to the top of the protective plate 9, and the slot hole 62 and the mounting column 61 are arranged corresponding to each other; the mounting column 61 can be inserted into the slot hole 62 to limit and fix the top of the protective plate 9, and by inserting the slot hole 62 at the top of the protective plate 9 into the mounting column 61, the top of the protective plate 9 can be fixed, so that the protective plate 9 can be stably installed between the top plate 3 and the bottom plate 4, preventing the protective plate 9 from shifting and detaching during use.

[0051] Specifically, the mounting mechanism 6 also includes a mounting block 63 fixed to the top of the base plate 4 and a mounting ring 64 provided on the outer edge of the base plate 4, and the mounting block 63 and the mounting ring 64 are extended outward from the top of the base plate 4; the mounting block 63 and the mounting ring 64 are combined to form a mounting groove 65 for accommodating the bottom of the protective plate 9, and the mounting groove 65 limits and fixes the bottom of the protective plate 9. By inserting the bottom of the protective plate 9 into the mounting groove 65, the bottom of the protective plate 9 can be fixed, so that the protective plate 9 can be stably installed between the top plate 3 and the base plate 4, preventing the protective plate 9 from shifting and detaching during use.

[0052] Specifically, the fixing mechanism 7 includes a fixing block 71 fixed to the bottom of the top plate 3 and the top of the bottom plate 4, and the fixing block 71 is extended outward from the top of the bottom plate 4; the fixing block 71 and the fixing rings 72 at both ends of the insulating wire frame 2 are arranged corresponding to each other, and the fixing block 71 and the fixing ring 72 are in contact with each other to fix the axial position of the iron core and the insulating wire frame 2, and the fixing ring 72 extends outward to be provided with a fixing step 73, and the fixing step 73 is in contact with the outer wall of the fixing block 71 to fix the radial position of the iron core and the insulating wire frame 2. By pressing the top plate 3 and the bottom plate 4 through the connecting mechanism 5, the fixing block 71 can be driven to press the fixing ring 72, so that the position of the stator core 1 and the insulating wire frame 2 can be fixed to prevent the stator core 1 and the insulating wire frame 2 from being displaced after long-term operation.

[0053] Specifically, the limiting mechanism 8 includes a limiting groove arranged in a ring on the outer wall of the stator core 1 and the insulating wire frame 2, and the limiting groove and the connecting pin 51 of the connecting mechanism 5 are arranged corresponding to each other; the connecting pin 51 can be inserted into the limiting groove to limit the circumferential position of the stator core 1 and the insulating wire frame 2, which can prevent the stator core 1 and the insulating wire frame 2 from rotating and fix the position of the stator core 1 and the insulating wire frame 2.

[0054] Specifically, a potting cavity 10 is provided between the two ends of the insulating wire frame 2 and the bottom of the top plate 3 and the top of the bottom plate 4, and the potting cavity 10 is interconnected with the potting port 31, so that after the protective plate 9 is installed, the stator can be potted through the potting port 31.

[0055] Specifically, the outer surface of the insulating wire frame 2 is covered with a potting layer 13, and the potting layer 13 wraps the winding 12 and the Hall plate 14. By setting the potting layer 13 to wrap the winding 12 and the Hall plate 14, the entire motor stator is potted as a whole, and the winding 12, the Hall plate 14 and the Hall element 16 can be fully isolated from the outside world. Even if pollutants enter the inside of the motor, it will not damage the normal operation of the motor. It is very suitable for highly polluted machine tool places.

[0056] Potting (glue pouring) is the process of pouring polyurethane potting glue, silicone potting glue, epoxy resin potting glue into devices equipped with electronic components and circuits by equipment or manual methods, and curing them at room temperature or heating conditions to become thermosetting polymer insulating materials with excellent performance, thereby achieving the purpose of bonding, sealing, potting and coating protection.

[0057] In the utility model, epoxy resin is used for potting, which has good confidentiality function and has the characteristics of fixation, insulation, waterproof, oil-proof, dust-proof, anti-theft, corrosion resistance, aging resistance, and resistance to cold and heat shock.

[0058] In addition, epoxy resin potting glue can easily penetrate into the gaps of products. It is suitable for potting small and medium-sized electronic components under room temperature conditions and without special requirements for environmental mechanical properties. It is suitable for potting stators.

[0059] In the utility model, the winding 12 and the Hall plate 14 are wrapped with a potting layer 13 so that the stator forms a whole, which can strengthen the integrity of the electronic device, improve the resistance to external impact and vibration, improve the insulation between internal components and circuits, and avoid direct exposure of components and circuits, thereby improving the waterproof, dustproof and moisture-proof performance of the stator.

[0060] Specifically, the ear 21 set on the top of the insulating wire rack 2 is engaged with the slot 15 set on the outer side of the Hall plate 14. In the utility model, the number of the ear 21 and the slot 15 is three respectively, and the ear 21 and the slot 15 are arranged corresponding to each other, so that the insulating wire rack 2 and the Hall plate 14 can be connected by the ear 21 and the slot 15. The ear 21 and the slot 15 are connected by the mutual engagement, and the traditional installation method of gluing or screwing is avoided, which can facilitate the disassembly of the insulating wire rack 2 and the Hall plate 14.

[0061] In addition, a Hall slot 22 is provided on the top of the insulating wire frame 2 to accommodate the installation of the Hall element 16 at the bottom of the Hall plate 14. The Hall slot 22 and the Hall element 16 are arranged corresponding to each other. There are three Hall slots 22, which can ensure that the Hall element 16 is fixed inside the insulating wire frame 2 and will not touch the stator core 1.

[0062] Working principle:

[0063] After the protective plate 9 of the motor stator for machine tools is installed, the stator can be potted from top to bottom using a vacuum potting machine. Viscous epoxy resin flows in from the potting port 31 and flows into the top plate 3 under the action of gravity. After standing for a period of time and the bubbles escape, the stator is transferred to an oven for heating and curing. At this time, the epoxy resin wraps the winding 12, the Hall plate 14, the Hall element 16, the insulating wire frame 2 and the stator core 1, so that the entire motor stator is potted as a whole, and the winding 12, the Hall plate 14 and the Hall element 16 can be fully isolated from the outside world. Even if pollutants enter the motor, it will not damage the normal operation of the motor. It is very suitable for highly polluted machine tool places.

[0064] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A motor stator for machine tools, comprising a stator core (1), characterized in that: Windings (12) are wound in adjacent wire slots (11) of the stator core (1), and insulating wire frames (2) for isolating the stator core (1) and the windings (12) are inserted in the wire slots (11) of the stator core (1); A top plate (3) located at the top of the insulating wire frame (2) and a bottom plate (4) located at the bottom of the insulating wire frame (2) are fixedly connected via a connecting mechanism (5), and a plurality of protective plates (9) are arranged in an array between the top plate (3) and the bottom plate (4) via a mounting mechanism (6); The top plate (3) and the bottom plate (4) are provided with fixing mechanisms (7) for fixing the axial and radial positions of the stator core (1) and the insulating wire frame (2), and the sides of the stator core (1) and the insulating wire frame (2) are provided with limiting mechanisms (8) for limiting the circumferential positions of the stator core (1) and the insulating wire frame (2); A plurality of potting openings (31) are provided at the top of the top plate (3) at positions corresponding to the insulating wire frame (2), and adjacent potting openings (31) are interconnected via connecting openings (32).

2. The stator of a motor for machine tools according to claim 1, characterized in that: The connecting mechanism (5) comprises a plurality of connecting pins (51) arranged in a circular array around the insulating wire frame (2); An upper cylindrical screw (52) arranged at the top of the top plate (3) passes through an upper connecting hole (33) arranged on the top plate (3) and is detachably connected to the top of the connecting pin (51), and a lower cylindrical screw (53) arranged at the bottom of the bottom plate (4) passes through a lower connecting hole (41) arranged on the bottom plate (4) and is detachably connected to the bottom of the connecting pin (51).

3. The stator of a motor for machine tools according to claim 2, characterized in that: The upper cylindrical screw (52) and the lower cylindrical screw (53) can be threadedly connected to the connecting pin (51) and clamp and limit the protective plate (9), the stator core (1) and the insulating wire frame (2).

4. The stator of a motor for machine tools according to claim 1, characterized in that: The mounting mechanism (6) comprises a mounting column (61) fixedly arranged at the bottom of the top plate (3) and a slot hole (62) fixedly arranged at the top of the protective plate (9), and the slot hole (62) and the mounting column (61) are arranged corresponding to each other; The mounting column (61) can be inserted into the slot hole (62) to position and fix the top of the protective plate (9).

5. The stator of a motor for machine tools according to claim 4, characterized in that: The mounting mechanism (6) further comprises a mounting block (63) fixedly mounted on the top of the bottom plate (4) and a mounting ring (64) arranged on the outer side of the bottom plate (4), and the mounting block (63) and the mounting ring (64) are arranged to extend outward from the top of the bottom plate (4); The mounting block (63) and the mounting ring (64) are combined to form a mounting groove (65) for accommodating the bottom of the protective plate (9), and the mounting groove (65) limits and fixes the bottom of the protective plate (9).

6. The stator of a motor for machine tools according to claim 1, characterized in that: The fixing mechanism (7) comprises a fixing block (71) fixedly arranged at the bottom of the top plate (3) and the top of the bottom plate (4), and the fixing block (71) is extended outward from the top of the bottom plate (4); The fixing block (71) and the fixing rings (72) at both ends of the insulating wire frame (2) are arranged corresponding to each other, and the fixing block (71) and the fixing ring (72) are in contact with each other to fix the axial position of the iron core and the insulating wire frame (2); The fixing ring (72) is extended outwardly to be provided with a fixing step (73), and the fixing step (73) abuts against the outer wall of the fixing block (71) to fix the radial positions of the iron core and the insulating wire frame (2).

7. The stator of a motor for machine tools according to claim 1, characterized in that: The limiting mechanism (8) comprises a limiting groove arranged in a ring shape on the outer wall of the stator core (1) and the insulating wire frame (2), and the limiting groove and the connecting pin (51) of the connecting mechanism (5) are arranged corresponding to each other; The connecting pin (51) can be inserted into the limiting groove to limit the circumferential position of the stator core (1) and the insulating wire frame (2).

8. The stator of a motor for machine tools according to claim 1, characterized in that: A potting cavity (10) is provided between the two ends of the insulating wire frame (2) and the bottom of the top plate (3) and the top of the bottom plate (4), and the potting cavity (10) and the potting port (31) are interconnected.

9. The stator of a motor for machine tools according to claim 1, characterized in that: The outer surface of the insulating wire frame (2) is covered with a potting layer (13), and the potting layer (13) wraps the winding (12) and the Hall plate (14).

10. The stator of a motor for machine tools according to claim 9, characterized in that: The ear (21) arranged on the top of the insulating wire frame (2) engages with the slot (15) arranged on the outer side of the Hall plate (14), and the top of the insulating wire frame (2) is provided with a Hall slot (22) for accommodating the installation of the Hall element (16) at the bottom of the Hall plate (14).

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