Brushless inner rotor motor structure facilitating wire passing

Abstract

The utility model relates to the technical field of brushless inner rotor motors, and provides a brushless inner rotor motor structure convenient for wire passing, which comprises a casing, a rear cover arranged on the outer wall of one side of the casing, a stator iron core arranged inside the casing, a front wire frame arranged on the outer wall of one side of the stator iron core, and a rear wire frame arranged on the outer wall of the other side of the stator iron core. Enameled wires distributed in an array are wound on the outer wall of the stator core and located between the front coil holder and the rear coil holder, and terminals distributed at equal intervals are installed on the inner wall of one side of the rear coil holder. According to the utility model, a brand-new PCB is designed, wires pass through the PCB, winding wire passing is realized through the circuit of the PCB, and a triangular parallel connection method is adopted, i.e., three basic unit motors are connected in parallel, so that the smaller the internal resistance of the winding is, the smaller the consumed power is, and the larger the power output to the outside is. And the motor has higher output power in the volume with the same outer diameter length.

Description

TECHNICAL FIELD

[0001] The utility model relates to a brushless inner rotor motor structure of convenient wire passing belongs to brushless inner rotor motor technical field. BACKGROUND

[0002] Brushless inner rotor motor is a kind of special motor, its rotor is located in the interior of motor, usually by permanent magnet, core and rotor shaft composition.The core principle of this motor is based on electromagnetic induction method, utilizes the magnetic flux of rotor and the interaction between the current on stator, makes motor rotation.Brushless inner rotor motor realizes automatic commutation by electronic commutation technology, avoids the carbon brush and commutator structure required by traditional commutation type direct current motor, reduces friction and loss, improves the life and performance of motor.

[0003] Brushless inner rotor motor is mainly composed of stator and rotor.Stator part is usually wound by coil, is fixed on the shell of motor;Rotor part is composed of permanent magnet, core and rotor shaft, is located in the interior of stator.Motor works, permanent magnet on rotor is subjected to force in the magnetic field generated by stator, makes rotor produce rotation.When rotor rotates to certain position, controller will switch the current direction of stator coil, to change the direction of magnetic field, so that rotor continues to rotate.

[0004] The motor of electric tool class, usually requires high speed, high power output of motor.In the volume of same outer diameter length, customer often requires motor to have higher output power.But there are some problems in the structure of existing motor, for example, the enameled wire inside the shell of such motor is particularly thick, lead to when making the stator of motor, thick enameled wire is difficult to wire, the difficulty of operation is greater, the assembly time is longer, makes the enameled wire wire bad rate be very high, thereby influence the service life of motor. UTILITY MODEL CONTENTS

[0005] In order to solve the above problem, the utility model provides a brushless inner rotor motor structure of convenient wire passing to more exactly solve how to improve the output power of motor under the condition of same volume, and solve the problem of enameled wire wire difficulty.

[0006] The utility model is realized by the following technical scheme:

[0007] The utility model provides a brushless inner rotor motor structure of convenient wire, including the casing, the casing one side outer wall is provided with the back cover, and the casing inside is provided with the stator core, the stator core one side outer wall is provided with the front line frame, and the stator core's other side outer wall is provided with the back line frame, the stator core's outer wall is located between the front line frame and the back line frame and is wound with the array distribution enameled wire, the back line frame one side inner wall is installed with the terminal of equal distance distribution, and the terminal one side outer wall is fixedly connected with the stator assembly that is composed of the PCB board subassembly, the stator assembly's inner ring is provided with the rotor assembly, and the rotor assembly inside is provided with the rotor core.

[0008] Design a new PCB board, wire in the PCB board, through the wire of PCB board realizes winding wire, adopts triangle parallel connection method, that is, three basic unit motors are connected in parallel, the smaller the internal resistance of winding is, the smaller the power consumption is, and the greater the power output to the outside is, in the same volume of outer diameter length, the motor has higher output power;

[0009] This direct current brushless inner rotor motor, three-phase lead-out wire is connected with external control board and power supply, after electrification, the control board calculates according to internal software algorithm, thereby different current is given to the armature winding wound on the stator core, each phase winding is turned on according to certain time sequence, through electronic commutation, thereby the rotor assembly rotates, reduces the bad rate of enameled wire wire, the structure is more stable, and the service life is longer.

[0010] Further, the inner walls of the casing and the back cover are each provided with a ball bearing, and the rotor core is disposed between the two ball bearings. The ball bearings can reduce the rotational resistance of the motor shaft and also support the motor shaft.

[0011] Further, symmetrically distributed thrust rings are fixedly connected between the two ball bearings in the interior of the casing, and the rotor core is tightly attached to the outer walls of the two thrust rings. Since the thrust rings are provided on both sides of the rotor core, the thrust rings can tightly adhere to the rotor core, preventing the rotor core from shaking in the working state, thereby improving the stability during the operation of the motor.

[0012] Further, symmetrically distributed screws are installed on the connection between the casing and the back cover.

[0013] Further, equidistantly distributed magnets are provided between the two thrust rings, and the magnets are disposed outside the rotor core. The rotating magnetic field is generated by the multiple magnets on the rotor core, and the driving force is provided for the motor shaft through the change of the magnetic field, thereby continuously rotating the motor shaft.

[0014] Further, the inner wall of the rotor core is provided with a motor shaft, and a wave pad is arranged at one end of the motor shaft inside the rear cover. The wave pad is a wave-shaped gasket, which can provide better support and stability when installed at the end of the motor shaft, thereby reducing noise and vibration.

[0015] Further, the motor shaft is arranged through the inner rings of the two ball bearings.

[0016] Further, the number of terminals is nine, and the number of magnets is six.

[0017] The utility model discloses the beneficial effect:

[0018] The utility model discloses a kind of brushless inner rotor motor structure of convenient wire, design a new PCB, wire is passed on PCB, realize winding wire passing through the circuit of PCB, adopt triangle parallel connection method, i.e. three basic unit motors are connected in parallel, three basic unit motors are connected in parallel, the internal resistance of winding is smaller, so the power consumed is smaller, the power output to outside is larger, in the volume of same outer diameter length, motor has higher output power;

[0019] This direct current brushless inner rotor motor, three-phase lead-out wire is connected with external control board and power supply, after electrification, control board according to the algorithm of internal software, to the armature winding wound on stator core different current, make each phase winding be switched on according to certain time sequence, pass through electronic commutation, to make rotor assembly rotate, reduce the bad rate of enameled wire wire passing, structure is more stable, and service life is longer. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the electric machine structure diagram of the utility model;

[0021] Figure 2 It is the stator assembly structure schematic view of the utility model;

[0022] Figure 3 It is the rotor assembly structure schematic view of the utility model;

[0023] Figure 4 It is the rear wire holder and terminal structure schematic view of the utility model;

[0024] Figure 5 It is the terminal connection structure schematic of the utility model Figure 1 ;

[0025] Figure 6 It is the terminal connection structure schematic of the utility model Figure 2 ;

[0026] Figure 7 It is the triangle parallel winding structure schematic view of the utility model.

[0027] Reference signs are as follows:

[0028] In the figure: 1, front line frame; 2, enameled wire; 3, stator core; 4, rear line frame; 5, terminal; 6, stator assembly; 7, ball bearing; 8, thrust collar; 9, magnet; 10, rotor core; 11, rotor assembly; 12, rear cover; 13, screw; 14, casing; 15, wave pad. DETAILED DESCRIPTION

[0029] In order to more clearly and completely illustrate the technical scheme of the utility model, the utility model will be further described below in combination with the drawings.

[0030] Please refer to Figures 1-7 The utility model provides a brushless inner rotor motor structure convenient for wire passing, which comprises a casing 14, wherein one side outer wall of the casing 14 is provided with a rear cover 12, and the casing 14 is internally provided with a stator core 3; one side outer wall of the stator core 3 is provided with a front line frame 1, and the other side outer wall of the stator core 3 is provided with a rear line frame 4; an array of enameled wires 2 is wound on the outer wall of the stator core 3 between the front line frame 1 and the rear line frame 4; equidistantly distributed terminals 5 are mounted on one side inner wall of the rear line frame 4, and one side outer wall of the terminals 5 is fixedly connected with a stator assembly 6 composed of a PCB plate assembly; a rotor assembly 11 is arranged on the inner ring of the stator assembly 6, and the rotor assembly 11 is internally provided with a rotor core 10.

[0031] In the embodiment, a brand-new PCB plate is designed, the wire passing is on the PCB plate, the wire passing of the winding is realized through the circuit of the PCB plate, a triangular parallel connection method is adopted, that is, three basic unit motors are connected in parallel, the three basic unit motors are connected in parallel, the internal resistance of the winding is smaller, the power consumed is smaller, and the power output to the outside is larger; in the same volume with the same outer diameter length, the motor has higher output power;

[0032] The DC brushless inner rotor motor is connected with an external control board and a power supply through three-phase lead-out wires; after being powered on, the control board calculates according to the algorithm of the internal software, thereby providing different currents to the armature winding wound on the stator core 3, making each phase winding conduct in a certain time sequence, and realizing electronic commutation, so that the rotor assembly 11 rotates, the defective rate of the enameled wire 2 wire passing is reduced, the structure is more stable, and the service life is longer.

[0033] The inner wall of the casing 14 and the back cover 12 is provided with a ball bearing 7, and the rotor core 10 is arranged between the two ball bearings 7, and the two ball bearings 7 are fixedly connected with the symmetrically distributed thrust rings 8 in the interior of the casing 14, and the rotor core 10 is tightly attached to the outer wall of the two thrust rings 8, the connection part of the casing 14 and the back cover 12 is provided with the symmetrically distributed screws 13, the two thrust rings 8 are provided with the equidistantly distributed magnets 9, and the magnets 9 are arranged outside the rotor core 10, the inner wall of the rotor core 10 is provided with a motor shaft, and the back cover 12 is provided with a wave pad 15 at one end of the motor shaft, the motor shaft is arranged through the inner ring of the two ball bearings 7, the number of the terminal 5 is nine, and the number of the magnet 9 is six.

[0034] The ball bearing 7 can reduce the rotating resistance of the motor shaft, and can also support the motor shaft, and the rotating magnetic field is generated by the multiple magnets 9 on the rotor core 10, and the driving force is provided for the motor shaft through the change of the magnetic field, and the motor shaft is controlled to rotate continuously, and since the thrust rings 8 are arranged on both sides of the rotor core 10, the thrust rings 8 can tightly adhere to the rotor core 10, so that the rotor core 10 is prevented from shaking in the working state, thereby improving the stability of the motor in the working process, and in addition, the wave pad 15 is a wave-shaped pad, and the wave pad 15 installed at the end of the motor shaft can provide better support and stability, thereby reducing noise and vibration.

[0035] The motor is assembled by the front frame 1, the enameled wire 2, the stator assembly 6 composed of the stator core 3, the rear frame 4, the terminal 5, the PCB board assembly, the ball bearing 7, the thrust ring 8, the magnet 9, the rotor assembly 11 composed of the rotor core 10 and the motor shaft, the back cover 12, the screw 13, the casing 14 and the wave pad 15.

[0036] The terminal 5 is press-fitted on the clamping groove of the rear frame 4, and nine slots of the rear frame 4 are press-fitted with nine connection terminals 5, taking nine slots as an example. Six slots of the rear frame 4 are press-fitted with six connection terminals 5. The number of turns of the enameled wire 2 wound on each tooth of the stator assembly 6 is the same, and the direction is the same. In this way, one wire is wound from the beginning to the end, and the head and tail wires are closed at the terminal 5. Then the enameled wire 2 is sequentially spot-welded with the terminal 5, and the short-circuit phase connection is connected. There are also nine pads on the PCB board, and the PCB board pad cooperates with the nine terminals 5 of the rear frame 4, and then the solder is soldered to be conductive.

[0037] The three-phase lead-out wire of the direct-current brushless internal rotor motor is connected with an external control board and a power supply. After being powered on, the control board calculates according to the algorithm of the internal software, thereby providing different currents to the armature winding wound on the stator core 3, so that each phase winding is turned on in a certain time sequence, and the rotor assembly 11 is rotated through electronic commutation.

[0038] Of course, the utility model also can have other various implementation manners, based on this implementation manner, other implementation manners obtained by the ordinary skilled person in the art without making any creative labor all belong to the range of the utility model.

Claims

1. A brushless internal rotor motor structure which facilitates wire passage, characterized by, The utility model relates to a motor, including casing, one side outer wall of casing is provided with back cover, and the inside of casing is provided with stator core, one side outer wall of stator core is provided with front line frame, and the other side outer wall of stator core is provided with rear line frame, the outer wall of stator core is wound with array distribution's enameled wire between front line frame and rear line frame, the inside wall of rear line frame is installed with equidistance distribution's terminal, and the outer wall of terminal is fixedly connected with the stator assembly that is composed of PCB board subassembly, the inner circle of stator assembly is provided with rotor assembly, and the inside of rotor assembly is provided with rotor core.

2. The convenient overline brushless internal rotor motor structure according to claim 1, characterized in that, The inner wall of the casing and the back cover is provided with a ball bearing, and the rotor core is arranged between the two ball bearings.

3. The convenient overline brushless internal rotor motor structure according to claim 2, characterized in that, The inside of the casing between the two ball bearings is fixedly connected with symmetrically distributed thrust rings, and the rotor core is tightly attached to the outer wall of the two thrust rings.

4. The convenient overline brushless internal rotor motor structure according to claim 1, characterized in that, The connection between the casing and the back cover is provided with symmetrically distributed screws.

5. The convenient overline brushless internal rotor motor structure according to claim 3, characterized in that, The two thrust rings are provided with equidistance distributed magnets, and the magnets are arranged outside the rotor core.

6. The convenient overline brushless internal rotor motor structure according to claim 1, characterized in that, The inner wall of the rotor core is provided with a motor shaft, and the inside of the back cover is provided with a wave pad at one end of the motor shaft.

7. The convenient overline brushless internal rotor motor structure according to claim 6, characterized in that, The motor shaft is arranged through the inner circle of the two ball bearings.

8. The convenient overline brushless internal rotor motor structure according to claim 1, characterized in that, The number of terminals is nine, and the number of magnets is six.

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