KR200172735Y1 - Inserting apparatus for motor rotor - Google Patents

Abstract

Disclosed is a motor rotor insertion apparatus for use in inserting a rotor into a stator of a motor. This is particularly for automation without damaging the motor rotor, whereby the chucking jig 50 is chucked at the rotor feed position and unchucked at its insertion position, and the chucking jig 50 is vertical and horizontal. Actuators 60 and 70 that drive in the respective directions. The chucking jig 50 is capable of chucking by lowering and inserting the rotor shaft 14 thereon. According to this apparatus, the rotor is inserted at the correct position, so that the stator does not collide and be partially damaged during the insertion process. Therefore, it is possible to assemble a motor of good quality, and in particular, to automate the insertion of the rotor. Therefore, it is effective to improve the productivity of the motor.

Description

Motor rotor insert

The present invention relates to a motor rotor insertion apparatus for assembling the rotor to the stator of the motor, and more particularly to a motor rotor insertion apparatus for the automation of the motor assembly process.

In order to improve the productivity of the motor, full automation from the production of each part to the final assembly process is required. As an example of a motor, for example, a brushless DC motor for driving a fan installed in an outdoor unit of an air conditioner, the motor is a rotor assembly 10 and a stator assembly 20 as shown in FIG. ) And upper and lower housings 30 and 40. The rotating assembly 10 includes an iron core 11, a cylindrical magnet 12 enclosing an iron core 11 main surface, a ring magnet 13 attached to an upper surface of the iron core 11, a shaft 14 fitted in the center of the iron core 11, And bearings 15 and 16 coupled to both ends of the shaft 14. Here, the two magnets 12 and 13 are provided in place of the armature winding, the commutator and the brush of the conventional wound rotor, one for torque generation and the other for rotation position (or phase) detection. The stator assembly 20 consists of an iron core 21 perforated with an inner diameter for accommodating the iron core 11 of the rotor and a stator winding 22 wound in a slot of the iron core 21. The upper housing 30 and the lower housing 40 support the cylindrical portions 31 and 41 and the bearings 15 and 16 of the rotor shaft 14 having inner diameters in which the stator iron cores 21 are pressed in both directions. It has bearing supports 32 and 42. The assembly of the motor generally involves pressing the stator assembly 20 into the lower housing 40, inserting the rotor assembly 10 therein, and finally pressing and finishing the upper housing 30. Is done. Here, the air gap of the rotor and the stator is very narrow, and the torque generating magnet 12 of the rotor has a strong magnetic field, and the magnet 12 is particularly hard to break even in a relatively weak impact due to its high hardness. Has the nature. Therefore, care must be taken to ensure that the magnet 12 does not collide with the iron core 21 of the stator assembly 20 when the rotor assembly 10 is inserted.

Conventionally, there is no automatic means for the final assembly of such a motor, so it has been resorted to by hand. However, in manual operation, when the rotor is brought closer to the stator assembly position, the magnet 12 of the rotor attracts the stator core 21 strongly at any moment and the worker's hand is momentarily accompanied or even misses the rotor. Things happen often. Therefore, the edge of the rotor magnet 12 hits the stator iron core 21 and is damaged, thereby deteriorating the magnetic properties or changing the magnetic characteristics. In particular, small pieces of magnets exist in the air gap, thereby greatly improving the performance and life of the motor. It is shortened.

On the other hand, although generally most of the processes for each assembly of the motor are already automated, it is pointed out that conventionally, such a manual operation cannot achieve full automation of motor production. This problem is similarly pointed out in most motors as well as brushless DC motors as shown, which is a major obstacle to productivity improvement.

The purpose of the present invention is a motor rotor inserting apparatus for inserting the rotor at the correct position without shaking so that the rotor magnet of the brushless DC motor is damaged during insertion, thereby increasing the defective rate and reducing the performance and life of the motor. To provide.

Another object of the present invention is to provide a motor rotor insertion apparatus capable of automating the rotor insertion operation to improve the productivity of the motor.

1 is a partial separation cross-sectional view showing the assembly structure of the brushless DC motor.

Figure 2 is a partial cutaway side view showing the motor rotor insertion apparatus according to the present invention with the rotor and stator of the motor.

Figure 3 is an exploded perspective view of the chucking jig used in the motor rotor insertion apparatus according to the present invention.

4 is a partial cutaway side view showing a state in which the motor rotor is chucked to the motor rotor insertion apparatus according to the present invention.

Figure 5 is a plan view showing a state in which the motor rotor is moved horizontally while the motor rotor insertion apparatus chucked according to the present invention.

Figure 6 is a cut side view showing a state in which the motor rotor is inserted into the stator by the motor rotor insertion apparatus according to the present invention.

* Explanation of symbols for main parts of the drawings

10: rotor assembly 12: magnet

14: rotor shaft 16: bearing

20: stator assembly 21: stator iron core

40: lower housing 42: bearing support

50: chucking jig 51,51 ′: chucking arm

52,52 ′: Hinge 54,54 ′: Chucking groove

55,55 ′: Pad 50: Tension spring

60: rotary actuator 70: elevating actuator

80: rotor supply position 81: carrier

90: rotor insertion position 91: fixed base

In order to achieve the above objects, the present invention is a device for fixing the stator of the motor in the working position while being pressed into the lower housing and inserting the rotor therein, the holding shaft of the rotor in the rotor assembly supply position A chucking means for chucking to be lifted up,

The chucking means is composed of driving means for moving to the rotor assembly supply position and its insertion position and to move up and down at each position.

In particular, the invention devises the chucking means to chuck it so that the rotary shaft can be elastically inserted by descending from the top of the rotor supply position as the chucking means. A special jig is developed with a simple structure, and at least two actuators capable of moving the jig in the vertical direction and the horizontal direction are provided as the driving means.

According to the present invention, since a dedicated jig for chucking the rotor assembly is used, there is no fear that the rotor assembly may be missed by the magnetic attraction force with the stator during the insertion. In addition, precise control of the actuator driving the dedicated jig allows the rotor assembly to be inserted in the correct position. Therefore, it is possible to solve the problem that the above-described rotor magnet is damaged by hitting the stator iron core in the insertion process.

In addition, according to the present invention, by applying a conventional component transfer line to the automated positioning of the stator assembly in the working position and the transfer of the rotor assembly to the supply position, the automated transfer line and the actuator synchronously By controlling the pressure, the rotor insertion process can be automated. Therefore, the present invention provides an instrument that can realize full automation of the motor production line.

When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention as follows. The drawings referred to below will be described with the same reference numerals for the same parts as in FIG. 1 for convenience of description.

Motor rotor inserting apparatus according to the embodiment of the present invention, as shown in Figure 2, the chucking jig 50 for chucking the shaft 14 of the rotor assembly 10 and the chucking jig 50 is driven in the vertical and horizontal directions It consists of a rotary actuator 60 and a lifting actuator 70 to drive means for. The chucking jig 50 is connected to the end of the horizontal arm 61 of the rotary actuator 60, the rotary actuator 60 is installed on the lifting rod 71 of the lifting actuator 70.

The chucking jig 50 is pinched by lowering the shaft 14 of the rotor assembly 10 thereon, the detailed structure of which will be described later. The rotary actuator 60 rotates with respect to the lifting rod 71, and for example, an electric motor or a pneumatic or hydraulic motor capable of forward and reverse rotation may be used. In addition, the lifting actuator 70 is operated so that the lifting rod 71 is sunk, and a solenoid mechanism or a pneumatic or hydraulic cylinder can be used for this. Accordingly, as shown in FIG. 5, the chucking arm 50 can be horizontally moved to the rotor supply position 80 and its working position 90 as shown in FIG. 5 by the rotation operation of the rotary actuator 60, and the respective positions 80 By operating the above-mentioned lifting actuator 70 at 90, the chucking arm 50 can be raised and lowered together with the rotary actuator 60 in the vertical direction. Here, both actuators 60 and 70 may be interchanged with each other, and may be installed together without being separated from each other.

In FIG. 2, reference numeral 20 denotes a stator assembly, and 91 denotes a stator that is fixedly installed at the rotor insertion position to seat and support the stator assembly.

3 shows the structure of the chucking jig 50 described above, wherein the chucking jig 50 pivotally supports the chucking arms 51 and 51 'and the chucking arms 51 and 51' which are reciprocated to both sides. The support arm 61 of the rotary actuator and both chucking arms 51 and 51 'are tension springs 56 that pull back and forth elastically, such as tongs. The chucking arms 51 and 51 have hinge portions 52 and 52 'that overlap each other like the ends of the supporting arm 61 near the rear end thereof, and the hinge portions 52 and 52' and the supporting arm 61 are provided. The pivot 53 which is fastened through the end portion is pivotable so as to open and contract with each other like a forceps. Semi-circular chucking grooves 54, 54 'are formed in the centers of the chucking arms 51, 51' which face each other, and the pads 55, 55 'have high friction and elasticity. Is attached, and at the distal end of the chucking arms 51 and 51 ', there are spring hook pins 57 and 57' for hooking the tension spring 56. Here, the semi-circular chucking grooves 54, 54 'are formed such that the lower ends of the holes made by joining them while the chucking arms 51, 51' are retracted are slightly larger than the diameter of the rotor shaft described above and gradually become smaller at the top thereof. It is tapered so that the rotor shaft can enter well between them in its retracted state. The pads 55, 55 ′ protect the outer diameter of the chucked rotor shaft and at the same time utilize their own great frictional forces while the rotor shaft is chucked while moving or inserting into the chucking state with the elasticity of the aforementioned tension spring 56. (54,54 ') to prevent slipping. The chucking jig 50 of the present invention does not undergo a complicated process of mechanically interlocking the two chucking arms 51 and 51 'like a forceps to open and close them, as shown in FIG. 14) It is designed so that it can be pulled down from the top to the bottom so that it can be pinched elastically between the chucking grooves 54, 54 'and precisely between the pads 55, 55'. . Reference numeral 58, which is not described in the drawing, is a spacer protrusion protruding from one side of the chucking arm 51 to maintain the chucking grooves 54, 54 'at the minimum diameter.

Hereinafter, a process of inserting the rotor assembly of the motor into the stator assembly by using the rotor insertion device including the chucking jig 50 and the actuators 60 and 70 will be described.

Referring first to FIG. 4, when the rotor assembly 10 is supplied to its supply position 80 in an upright position on the carrier 81, the chucking jig 50 is placed on the rotor supply position 80 line. And then the elevating actuator 70 is operated to descend with the rotary actuator 60. Then, the rotor shaft 14 enters into the chucking grooves 54, 54 'of both chucking arms 51, 51' coincident with the line of the rotor supply position 80, precisely between the pads 55, 55 '. In this case, as the tension spring 56 shown in FIG. 3 is stretched between the spring hook pins 57 and 57 ', the gap between the chucking arms 51 and 51' is widened, and the chucking grooves 54 and 54 are formed. The rotor shaft 14 is allowed to be inserted as shown in FIG. 4 between the pads 55, 55 ′ of ′). As a result, the rotor shaft 14 is held firmly between the pads 55 and 55 'by the resilience of the elongated tension spring 56 described above. Therefore, after the operation by raising the lifting actuator 70, only the empty carrier 81 remains in the rotor supply position 80 and the rotor assembly 10 is lifted up with the chucking jig 50 picked up.

FIG. 5 shows an operation of horizontally moving the chucking jig 50 from its supply position 80 to the insertion position 90 together with the rotor assembly 10 placed therein, which actuates the rotary actuator 60. To do. In this way, the chucking jig 50 is horizontally moved from the rotor supply position 80 to the insertion position 90, and then raised and lowered at the insertion position 90, that is, in the state as shown in FIG. Ending the rotor insertion by lowering the actuator 70 again and then raising it.

2 is a state in which the chucking arm 50 is moved on the rotor insertion position 90 while the rotor assembly 10 is held, and FIG. 6 is a state in which the chucking arm 50 is lowered as it is. Referring to these drawings, the stator 91 is placed at the rotor insertion position 90, and the stator assembly 20 is seated therein in a state coupled with the lower housing 40.

In the state as shown in FIG. 2, the centers of the rotor assembly 10 and the stator assembly 20 chucked to the chucking jig 50 coincide with each other, and thus the lower bearing 16 and the lower housing fitted to the rotor shaft 14. The position of the bearing support part 42 formed in 40 is matched. Accordingly, when the chucking jig 50 is lowered, the rotor assembly 10 is inserted into the stator assembly 20 as shown in FIG. 6 and the lower bearing 16 of the rotor shaft 14 simultaneously moves the stator assembly 20. It is pressed into the bearing support 42 of the lower housing 40 coupled to. Then, when the chucking jig 50 is raised, the rotor assembly 10 remains in the inserted position and the rotor shaft 14 is removed from the chucking jig 50 so that only the chucking jig 50 is raised. For reference, the magnetic attraction force between the rotor magnet 12 and the stator iron core 21 gradually increases as the rotor insertion proceeds, and is fully inserted, that is, the rotor magnet 12 and the stator iron core 21. In the state where the magnetic pole faces are mutually opposed, the magnetic attraction force is maximum.

Therefore, the chucking force, including the spring elasticity and pad friction force, of the chucking jig described above is designed to be generally larger than the magnetic attraction force acting in the rotor insertion process and smaller than the maximum magnetic suction force after the insertion is completed. It is possible to get out the chucking jig.

As such, the present invention lowers the rotor assembly 1 vertically in accordance with the center captain of the stator assembly 20, so that the rotor magnet 12 hits the stator core 21 during the insertion process and is damaged. And also allows the rotor insertion process to be performed quickly.

The rotor insertion apparatus according to the present invention described above does not exclude the automatic feeding means of the rotor and stator assemblies at the rotor feeding position and its insertion position. That is, it is possible to use a conventional conveyor system (not shown) in which the above-described rotor carriers are continuously arranged at regular intervals, and also to perform a series of operations for seating and lifting the rotor assembly on the above-described stator. Including a conventional robot device (not shown) that can be fully automated of the rotor insertion operation. As such, the present invention is not limited by the embodiments illustrated in the drawings and described above, and of course, more modifications and variations are possible within the scope of the following claims.

According to the present invention, it is possible to prevent the magnet from being broken in the process of inserting the rotor assembly into the stator assembly of the brushless DC motor as described above, in which the magnet is attached to the motor, in particular the rotor pole. Therefore, the present invention is effective in lowering the defective rate of the motor and improving the quality of the motor having good magnetic properties. In addition, the present invention is to devise a fully automatic automation of the rotor assembly insertion process to realize the full automation of the motor production line is to devise a contribution to improve the productivity of the motor.

Claims (5)

A motor rotor insertion apparatus for inserting a rotor into a stator of a motor, comprising: a chucking jig for chucking and lifting the shaft of the rotor assembly at a feeding position of the rotor assembly, and the chucking means at the feeding position; And driving means capable of reciprocating between the insertion positions and driving up and down at each position, wherein the chucking jig is pivoted in a direction in which the chucking arms reciprocated on both sides and the chucking arms on both sides are opened and retracted from each other. A hinge portion pivotally connected to each other, a chucking groove formed to be opposite to the chucking arms on both sides thereof, the chucking grooves which can be expanded and contracted to fit the rotor shaft, and a tension spring for resiliently pulling the chucking arms on both sides, wherein the driving means includes: It has a support arm for supporting the jig and the chucking jig is rotated to the feed position and the insertion position of the rotor And a lifting actuator operable to rotate the support arm, and a lifting rod supporting the rotating actuator, the lifting actuator being operative to lift the lifting rod such that the chucking jig is lifted with the rotating actuator. Motor rotor insertion apparatus, characterized in that. 2. The motor rotor insertion apparatus according to claim 1, wherein the chucking groove of the chucking jig is tapered so as to widen downward and narrow upward. The motor rotor insertion apparatus according to claim 1 or 2, further comprising a pad attached to the chucking groove of the chucking jig to protect the rotor shaft and prevent slipping. The motor rotor insertion apparatus of claim 1, wherein the chucking jig further includes a spacer protrusion protruding from the chucking arm on one side thereof so as to maintain a minimum distance between both chucking arms. The stator assembly according to claim 1, further comprising a rotor supply means for automatically supplying the rotor assembly to the supply position, including a carrier for standing up and receiving the rotor assembly, and a stator fixed to the rotor insertion position. And a stator seating means for seating on the stator while being coupled to the lower housing of the motor.