KR20180034804A - Assembling apparatus and method of brushless direct current motor - Google Patents

Abstract

The present invention relates to the assembling apparatus of an outer-type brushless direct current motor and the assembling method of an outer-type brushless direct current motor. It is possible to improve productivity and select the automatic or manual press-fitting assembly, and minimize a difference in a defect rate between an expert and a non-expert and produce uniform quality. In addition, it is possible to effectively prevent the defect and eccentricity of a product by measuring the press-fitting pressure of a press-fitting cylinder in real time in a load-cell measurement gauge and always performing a press-fitting operation within a range of predetermined press-fitting pressure. Also, when the shaft of a rotor assembly is inserted into the insertion hole of a holding block, an optical sensor senses the move bolt hole position of the rotor assembly to confirm the misinsertion of the rotor assembly. Only when the correct insertion of the rotor assembly is checked, the movable holder is operated to hold the shaft of the rotor assembly. So, it is possible to effectively prevent defective and eccentricity of the product. The assembling apparatus includes a working table, vertical guide bars, an up-down plate, a cylinder, an assembly holding unit, a chucking unit, and a stator assembly alignment unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a brushless DC motor,

The present invention relates to an assembling apparatus for an outer rotorless DC motor and a method for assembling the outer rotorless DC motor. More specifically, the present invention relates to a method of assembling an outer rotorless DC motor, The present invention relates to an assembling apparatus for an outer type brushless DC motor and a method of assembling the other typical brushless DC motor.

Generally, the electric motors using permanent magnets in a motor include a brush DC motor and a brushless DC motor.

Brushless direct current (BLDC) motors are often referred to as brushless DC motors, which have no brush inside the motor.

Brushless DC motors are electric motors in which a mechanical commutator (slip ring) of a DC motor or a synchronous motor is electrically switched. Since there is no need to supply a current to a rotating shaft, a commutator or a slip ring and a brush are not necessary, There is an advantage of low noise and easy maintenance.

Recently, a brushless direct current motor (BLDCM) has been widely used from a large motor application system to a small servo system.

The brushless DC motor has a very high ratio of instantaneous torque to rated torque, so that it has excellent dynamic response characteristics and maintains high efficiency over a wide operating range, which is advantageous for variable speed operation and control. In addition, since there are no mechanical brushes and commutators, maintenance and repair costs are reduced and there are few restrictions on the use environment.

The brushless direct current (DC) motor is divided into an internal type in which the rotor is located inside and an external type in which the rotor is located on the outside. The description of the present invention will be made with respect to the external type brushless DC motor.

The rotor of a brushless DC motor is manufactured by using a permanent magnet, and it is called a 2 pole, a 4 pole, a 6 pole, an 8 pole, etc. depending on whether a pair of N pole / S pole is formed. For reference, if it consists of a pair of magnets, that is, one N pole and one S pole, it is called a two pole (pole) motor.

The stator of a brushless DC motor is composed of three windings with a structure in which a plurality of iron cores are wound around a coil. It has the same characteristics as the brush type by installing the field winding on the rotor and armature winding on the stator and by determining the current direction and rotation angle of the winding using a sensor (Hall sensor, Photo Diode).

The electric current of the armature is made to flow so that the magnetic field generated in the armature winding is always at 90 ° with the fixed magnetic pole provided in the rotor. Generally, three or four phase inverters are used to change the direction of current.

Fig. 1 is a longitudinal sectional view showing a general outer brushless DC motor, and Fig. 2 is a side view showing a rotor assembly of a general outer brushless DC motor. Fig. 3 is a sectional view taken along the line AA in Fig. 4 is a view showing a move bolt hole.

1 to 4, a typical external brushless DC motor 1 is composed of a stator assembly 10 and a rotary assembly 20.

The stator assembly 10 comprises an armature winding section 11 in which a coil 11a is wound on a plurality of iron cores and a fixing structure 12 for supporting the armature winding section 11. [ A shaft (13) is formed in the center of the stator assembly (10).

The rotor assembly 20 includes a rotor 21 integrally formed with the shaft 22, a rotor ring 23 coupled to the lower portion of the rotor 21, and a plurality of annularly mounted rotor rings 23 And a permanent magnet (field magnet) 24 of N pole / S pole. A step 23a for supporting the permanent magnet 24 is formed inside the rotor ring 23. On the upper surface of the rotor 21, two move bolt holes 21a are formed at 180 degrees around the shaft 22.

The arrangement of permanent magnets is called a 2 pole, a 4 pole, a 6 pole, an 8 pole, etc. depending on how many pairs of N pole / S pole are made. For reference, if it consists of a pair of magnets, that is, one N pole and one S pole, it is called a two pole (pole) motor. The rotor assembly 20 is rotated using the current direction of the winding in the armature winding portion, the position of the permanent magnet, and a sensor (Hall sensor, Photo Diode).

Conventionally, when the rotor assembly 20 is assembled to the stator assembly 10, since the rotor assembly 20 is manually press-fitted and assembled, there is a problem that chucking and fixing are not performed well, and noise and vibration are defective.

That is, at the time of assembling the stator assembly 10 and the rotor assembly 20, a process of press-fitting three or more times by a manual press is performed. However, since the pressing force is not constant, And a safety accident involving the operator's fingers in the manual press may result.

In addition, when the manual press is indented, the deviation rate between the skilled and unskilled workers is more than 7%, and the deviation rate of the defect rate is severely generated for each worker, and the cycle time is 1EA / 60 seconds. The productivity is low.

Korean Patent Publication No. 10-2007-0054366 Korean Patent Publication No. 10-2013-0053271

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and it is an object of the present invention to provide an assembly method of an outer rotor type brushless DC motor capable of improving productivity and capable of selecting automatic or manual indentation and assembly and minimizing a difference in defect rate between skilled and non- And a method of assembling a typical brushless direct current (DC) motor.

Further, according to the present invention, the press-in pressure of the press-fitting cylinder is measured in the load-cell measuring gauge and the press-fitting operation is always performed within a predetermined press-fitting pressure range to effectively prevent defective and eccentricity of the product. The optical sensor senses the move bolt hole position of the rotor assembly to detect misapplication of the rotor assembly and only when the normal insertion of the rotor assembly is confirmed, The present invention provides an assembling apparatus for an outer rotorless DC motor and a method of assembling the outer rotorless DC motor, which can effectively prevent failure and eccentricity of a product by holding (gripping) the shaft of the rotor assembly. .

The present invention relates to an assembly device for an outer rotor type brushless DC motor (BLDCM) for press-fitting and assembling a rotor assembly and a stator assembly, comprising: a work table on which press-fitting assembly is performed; A plurality of vertical guide rods installed on the work table in a vertical direction with a predetermined distance therebetween; A horizontal fixed plate horizontally fixed to the upper end of the vertical guide rod at all times; An up-down plate installed vertically up and down along the vertical guide bar in the middle of the vertical guide bar; A press-fit cylinder fixedly mounted on the horizontal fixing plate for up-down the up-down plate; A rotor assembly holding unit installed on a bottom surface of the up-down plate to hold the shaft of the rotor assembly; A stator assembly seating jig that is installed on the work table to be able to be lifted up and down, and is positioned directly under the rotor assembly holding unit, and seats the stator assembly; A stator assembly chucking unit for chucking the stator assembly seated in the stator assembly seating jig; A stator assembly alignment unit for aligning the press-in position of the stator assembly fixed by the stator assembly chucking unit; And a control for controlling the series of operations for driving the press-fitting cylinder to press-fit the rotor assembly held by the rotor assembly holding unit and the stator assembly fixed by the stator assembly chucking unit Unit.

The apparatus for assembling an external type brushless DC motor (BLDCM) of the present invention includes a load cell measuring gauge installed at a lower portion of the stator assembly seating jig to measure a press-in pressure of the press-fitting cylinder; And an indicator for indicating a press-in pressure of the press-fitting cylinder measured by the load cell measurement gauge.

Wherein the rotor assembly holding unit comprises: a holding block having an insertion hole for inserting a shaft of the rotor assembly; An optical sensor for sensing a move bolt hole position of the rotor assembly for preventing erroneous insertion of the shaft of the rotor assembly; And a movable holder mounted on the holding block for holding the shaft of the rotor assembly only when normal insertion of the shaft of the rotor assembly is confirmed by the optical sensor.

The stator assembly seating jig includes a main block having a seating groove and a wire insertion groove for seating the stator assembly, and a connection block connected to the main block,

The stator assembly seating jig is mounted on the work table in such a manner that the stator assembly can be lifted up and down, so that one end of the connecting block is coupled to the vertical guide rod so as to be able to be lifted up, one end of the main block is coupled to the auxiliary vertical guide rod, The guide rod and the auxiliary vertical guide bar are provided with a spring for supporting the stator assembly seating jig.

The stator assembly chucking unit comprising: a plurality of chucks movably installed for selectively clamping or jawing the outer circumference of the shaft of the stator assembly seated in the seating groove; And a shaft support rod for supporting a lower end of the shaft of the stator assembly that is seated in the seating recess.

The stator assembly aligning unit is provided to be slidable with a predetermined length formed on the seating jig and includes an alignment guide having a shaft alignment groove for aligning the shaft of the stator assembly at an end thereof.

The assembling apparatus for an external type brushless DC motor (BLDCM) of the present invention further includes a stroke measuring unit for measuring a down position of the up-down plate.

The control unit includes a touch control panel for controlling a series operation of press-fitting assembly; Control panel switch; A press-in / release switch for manually actuating the press-in or release; And a safety light sensor for safety of a worker, wherein the touch control panel is operable by automatic operation and manual operation, and indicates an operation progress stage, and the up-down of the press- (Noise) and unfreezing (release) of the stator assembly chucking unit of the stator assembly and controls the stator assembly holding (noise) and unfreezing (laying) of the stator assembly chucking unit, And a foot switch for controlling the foot switch,

The control panel switch includes a control power-on / off switch, an operation manual / automatic switch, an operation button, a stop button, a reset button, a buzzer stop button, and an emergency button switch.

The safety light sensor automatically stops when both the worker and the worker enter the robot during automatic and manual operation, and the rotor assembly holding unit is stopped after rising.

Meanwhile, the method of assembling the outer brushless DC motor (BLDCM) of the present invention includes the steps of inserting the shaft of the rotor assembly into the rotor assembly holding unit with the orientation of the rotor assembly in the raised state, Detecting erroneous insertion of the shaft of the rotor assembly and determining normal insertion; Holding the rotor assembly when normal insertion of the shaft of the rotor assembly is verified; Seating the stator assembly on a stator assembly seating jig; Clamping the stator assembly; Aligning the indentation position of the stator assembly to prevent eccentricity and assembly failure; Lowering the press-fit cylinder to press-fit the rotor assembly into the stator assembly; Fastening the movable bolts for complete engagement (fastening improvement) of the rotor assembly and the stator assembly; Releasing the clamping of the stator assembly; And a step of raising the pressurizing cylinder and then taking out the outer rotorless DC motor which has been press-fitted and assembled, and transferring the outer rotorless DC motor to the inspection site.

In the step of holding the rotor assembly, when the shaft of the rotor assembly is inserted into the insertion hole of the holding block, an optical sensor senses erroneous insertion of the shaft of the rotor assembly, Only when the normal insertion of the shaft of the rotor assembly is confirmed, the movable holder is operated to hold the shaft of the rotor assembly.

In the step of lowering the pressurizing cylinder to press-fit the rotor assembly into the stator assembly, the load cell measuring gauge measures the press-in pressure of the press-fitting cylinder in real time, And the indentation pressure of the cylinder for use is indicated on the indicator so that the indentation cylinder is always press-fitted within a predetermined indentation pressure range.

INDUSTRIAL APPLICABILITY As described above, the present invention improves the productivity and enables automatic or manual press-fitting assembly selection, and minimizes the difference in the defect rate between the skilled person and the unskilled person, so that the uniform quality can be produced.

In addition, it is possible to effectively prevent defective and eccentricity of the product by measuring the press-in pressure of the press-fitting cylinder in real time in the load-cell measuring gauge and always performing the press-fitting operation within a predetermined press-fitting pressure range.

Also, when inserting the shaft of the rotor assembly into the insertion hole of the holding block, the optical sensor senses the move bolt hole position of the rotor assembly to confirm misapplication of the rotor assembly and confirms normal insertion of the rotor assembly Only when the movable holder is movable and holding the shaft of the rotor assembly, defective and eccentricity of the product can be effectively prevented.

1 is a vertical cross-sectional view of a general external type brushless direct current
2 is a side view showing a rotor assembly of a general external brushless DC motor;
3 is a sectional view taken along the line AA in Fig. 2
Figure 4 is a perspective view showing the movable bolt holes of the rotor assembly;
5 is a perspective view showing an assembling apparatus for an outer type brushless DC motor of the present invention.
6 is a front view showing an assembling apparatus for an outer type brushless DC motor of the present invention
Figure 7 is an enlarged view of the rotor assembly holding unit
Figure 8 shows a photograph of the rotor assembly holding unit
9 is a top view of the stator assembly seating jig and stator assembly chucking unit
10 is a photograph of the stator assembly seating jig, stator assembly alignment unit and stator assembly chucking unit
Fig. 11 is a photograph showing a state in which a moving bolt is fastened in a moving bolt hole
12 is a photograph showing an outer rotorless DC motor of a press-fit assembly
13 is a flowchart for explaining a method of assembling the outer type brushless DC motor of the present invention

1 to 4, an outer rotorless DC motor 1 is composed of a stator assembly 10 and a rotor assembly 20. The stator assembly 10 comprises an armature winding section 11 in which a coil 11a is wound on a plurality of iron cores and a fixing structure 12 for supporting the armature winding section 11. [ A shaft (13) is formed at the center of the stator assembly (10).

The rotor assembly 20 includes a rotor 21 integrally formed with the shaft 22, a rotor ring 23 coupled to the lower portion of the rotor 21, and a plurality of annularly mounted rotor rings 23 And a permanent magnet (field magnet) 24 of N pole / S pole. A step 23a for supporting the permanent magnet 24 is formed inside the rotor ring 23. On the upper surface of the rotor 21, two move bolt holes 21a are formed at 180 degrees around the shaft 22. A move bolt (not shown) is fastened to the move bolt hole 21a to further improve the fastening force between the stator assembly 10 and the rotor assembly 20. [

DESCRIPTION OF THE PREFERRED EMBODIMENTS An apparatus and method for assembling an external brushless DC motor according to the present invention will now be described with reference to the accompanying drawings.

FIG. 5 is a perspective view showing an assembling apparatus for an external type brushless DC motor according to the present invention, FIG. 6 is a front view showing an assembling apparatus for an external type brushless DC motor according to the present invention, and FIG. 10 is a photograph of the stator assembly seating jig, the stator assembly alignment unit and the stator assembly chucking unit, Fig. 11 is a photograph of the rotor assembly holding unit, Fig. Fig. 12 is a photograph showing an outer rotorless brushless direct-current motor which has been press-fitted and assembled. Fig.

Referring to the above drawings, the external brushless DC motor 1 described in the present invention can be widely used for a device requiring high-speed rotation such as a dron.

An assembling apparatus 200 for an external type brushless DC motor (BLDCM) of the present invention is a device for press-fitting and assembling the rotor assembly 20 and the stator assembly 10.

The assembling apparatus for an outer type brushless DC motor (BLDCM) of the present invention includes a work table 50, a vertical guide rod 60, a horizontal fixed plate 70, an up-down plate 80, An assembly holding unit 210, a stator assembly seating jig 220, a stator assembly chucking unit 230, a stator assembly alignment unit 240, and a control unit.

The work table 50 is for performing a press fitting assembly operation and is installed at a predetermined height from the ground surface (or indoor floor surface) by the frame 51. The vertical guide rods 60 are mounted on the work table 50 by two And is installed in a vertical direction with a certain distance. The horizontal fixing plate 70 is horizontally fixed to the upper end of the vertical guide bar 60.

The up-down plate 80 is installed vertically up and down along the vertical guide bar 60 in the middle of the vertical guide bar 60.

The press-fitting cylinder 90 is fixed to the horizontal fixing plate 70 to up-down the up-down plate 80. That is, the main body 91 of the press-fitting cylinder 90 is fixed to the horizontal fixing plate 70, and the head portion 93 of the rod 92 is fixed to the up-down plate 80.

A cylinder pneumatic regulator 280 is provided to adjust the air pressure of the pressurizing cylinder 90 and is configured to be able to turn on the cock 281 to introduce air pressure.

The pressure gauge 282 measures the air pressure introduced from the cylinder pneumatic regulator 280 and displays the supply pressure in the pressurizing cylinder 90.

The rotor assembly holding unit 210 is installed at the bottom (lower) of the up-down plate 80 to hold or grip the rotor assembly 20.

The rotor assembly holding unit 210 includes a holding block 211 having an insertion hole 211a for inserting the shaft 22 of the rotor assembly 20, A light sensor 212 that senses the position of the move bolt hole 21a of the rotor assembly 20 to prevent insertion and a normal insertion of the shaft 22 of the rotor assembly 20 by the light sensor 212 And a movable holder 213 mounted on the holding block 211 for holding the shaft 22 of the rotor assembly 20 only when it is confirmed. The optical sensor 212 is not provided on the left and right sides of the holding block 211 so that the optical sensor 212 can be held in consideration of the directionality of the rotor assembly 20 but only at least at the front side or the rear side. That is, the optical sensor 212 does not directly detect the movable bolt hole 21a, but also detects the position of the movable bolt hole 21a.

The stator assembly seating jig 220 is mounted on the work table 50 so as to be able to be lifted up and down, and is located directly under the rotor assembly holding unit 210 and functions to seat the stator assembly 10.

The stator assembly seating jig 220 includes a main block 224 having a seating groove 221 for seating the stator assembly 10 and a wire insertion groove 223 and a connecting block 226 ). An electric wire connected to the armature winding section 11 is inserted into the wire insertion groove 223 so as not to interfere during the press-fitting assembly. Since the electric wire is an ordinary electric wire connected to the electric motor, detailed description and explanation thereof will be omitted.

One end of the connecting block 226 is vertically coupled to the vertical guide rod 60 so as to be installed upside down on the work table 50 so as to be capable of being lifted up on the work table 50, And a spring 64 for resiliently supporting the stator assembly seating jig 220 is installed on the vertical guide rod 60 and the auxiliary vertical guide rod 62.

The stator assembly chucking unit 230 serves to chuck or clamp the stator assembly 10 seated in the stator assembly seating jig 220.

The stator assembly chucking unit 230 includes a plurality of chucks 231 movably installed to selectively clamp the outer circumference of the shaft 13 of the stator assembly 10 seated in the seating groove 221, And a shaft support rod 233 for supporting the lower end of the shaft 13 of the stator assembly 10 mounted in the seating groove 221.

The stator assembly alignment unit 240 serves to align the indentation position of the stator assembly 10 fixed by the stator assembly chucking unit 230.

The stator assembly alignment unit 240 is slidably movable only on a predetermined length on the stator assembly seating jig 220 and includes a shaft alignment groove 242 for aligning the shaft 13 of the stator assembly 10 And an alignment guide 243 formed thereon. A guide sloping surface (not shown) may be formed at the entrance of the shaft alignment groove 242 so that the shaft 13 can be smoothly inserted into the shaft alignment groove 242.

The control unit includes a rotor assembly 20 driven by the rotor assembly holding unit 210 by driving the indenting cylinder 90 and a stator assembly 10 fixed by the stator assembly chucking unit 230 Thereby controlling a series of operations for press-fitting.

The control unit includes a touch control panel 251 for inputting and controlling the series operation of the press-fitting assembly, a control panel switch 252 for various buttons, a press-in / release switch 253 for manually actuating the press- And a safety light sensor 254 for the safety of the operator.

The touch control panel 251 is operable by automatic operation and manual operation and indicates the progress of the operation. The touch control panel 251 displays the up-down of the press-fitting cylinder 90 and the holding of the rotor assembly 20 of the rotor assembly holding unit 210 (Noise) and unfreezing (release) of the stator assembly 230 and controls the holding (noise) and unfreezing (stalling) of the stator assembly 10 of the stator assembly chucking unit 230, And a foot switch 255 for controlling the foot switch 255.

The control panel switch 252 includes a control power-on / off switch, an operation manual / automatic switch, an operation button, a stop button, a reset button, a buzzer stop button, and an emergency button switch.

The safety light sensor 254 automatically stops when both the operator and the worker enter the robot arm during automatic and manual operation, and stops the cylinder for pressurization after the rotor assembly holding unit 210 is raised. The safety light sensor 254 may be installed on one side of the rotor assembly holding unit 210.

The apparatus for assembling the outer brushless DC motor (BLDCM) of the present invention includes a load cell measuring gauge 260 installed at the lower portion of the seating jig 220 for measuring the press-in pressure of the press-fitting cylinder 90, And an indicator 261 for indicating the press-in pressure of the press-fitting cylinder 90 measured by the gauge 260. [

The assembling apparatus for an external type brushless DC motor (BLDCM) of the present invention includes an up-down plate 80 and a stroke measuring unit 270 for measuring the lowering position of the press-fitting cylinder 90, an alarm, an alarm, .

13 is a flowchart for explaining an assembling method of the outer type brushless DC motor of the present invention.

13, the method of assembling the outer brushless DC motor (BLDCM) of the present invention is a method of assembling the rotor assembly 20 in the rotor assembly holding unit 210 with the press- (S 230) holding the shaft (22) of the rotor assembly (20) in alignment; Placing (240) the stator assembly (10) on the stator assembly seating jig (220); Clamping (S250) the stator assembly (10) seated in the stator assembly seating jig (220); Aligning the press-in position of the stator assembly (10) to prevent eccentricity and misassembly (S 260); (S270) of lowering the press-fitting cylinder (90) to press-fit the rotor assembly (20) into the stator assembly (10); Tightening (S 280) a move bolt (not shown) for full engagement of the rotor assembly 20 with the stator assembly 10; Releasing the clamping of the stator assembly 10 (S290); And a step (S 300) of raising the press-fitting cylinder (90), taking out the outer brushless DC motor which has been press-fitted and assembled, and transferring the brushless DC motor to the inspection site.

As described above, the optical sensor 212 is not provided on the left and right sides of the holding block 211 so that the optical sensor 212 can be held in consideration of the directionality of the rotor assembly 20, but only on the front side or the rear side.

That is, in order to fasten the move bolts in the move bolt holes 21a in the step 280 of fastening the move bolts, the position of the move bolt holes 21a should be located on the left and right sides of the operator, respectively. The bolt fastening operation can be performed.

Accordingly, in step 230 of holding the shaft 22 of the rotor assembly 20 by orienting the rotor assembly 20 in the rotor assembly holding unit 210, the directionality of the rotor assembly 20 Thereby holding the rotor assembly 20 in place. In other words, since the optical sensor 212 drives the movable holder 213 only when the beam is irradiated and reflected, it grips the shaft 22 of the rotor assembly 20, When the shaft 22 is inserted into the insertion hole 211a of the holding block 211 without the directionality of the rotor assembly 20 by mistake, that is, when the optical sensor 212 is aligned with the movable bolt hole 21a The optical sensor 212 does not operate and does not drive the movable holder 213 so that the shaft 22 of the rotor assembly 20 is not gripped. In this case, the operator must insert the shaft 22 into the insertion hole 211a of the holding block 211 by aligning the direction of the rotor assembly 20.

Therefore, only when the optical sensor 212 detects erroneous insertion of the rotor assembly 20 and normal insertion of the rotor assembly 20 is confirmed by the optical sensor 212, the movable holder 213 is operated Thereby holding the shaft 22 of the rotor assembly 20.

In the step S 270 of pushing and assembling the rotor assembly 20 into the stator assembly 10 by lowering the pressurizing cylinder 90, the load cell measuring gauge 260 is operated to press the press fitting pressure of the press fitting cylinder 90 And the indentation pressure of the indentation cylinder 90 measured by the load cell measurement gauge 260 is displayed on the indicator 261. The indentation cylinder 90 is press-fitted in the predetermined indentation pressure range, The defective and eccentricity of the product can be effectively prevented.

Hereinafter, the operation of the assembling apparatus 200 for an external type brushless DC motor of the present invention will be described.

The touch panel 251 is a control device for inputting and controlling the series operation of the press-fitting assembly. The control panel switch 252 includes a control power-on / off switch, an operation manual / automatic changeover switch, Button, a buzzer stop button, and an emergency button switch.

The touch control panel 251 is operable by automatic operation and manual operation and indicates the progress of the operation. The touch control panel 251 displays the up-down of the press-fitting cylinder 90 and the holding of the rotor assembly 20 of the rotor assembly holding unit 210 (Noise) and unfreezing (release) of the stator assembly 230 and controls the holding (noise) and unfreezing (stalling) of the stator assembly 10 of the stator assembly chucking unit 230, And a foot switch 255 for controlling the foot switch 255. The operator may manually actuate the push-in or release using the push-in and release switch 253. [

When the pressurizing cylinder (90) is not applied with a certain pressure when an omission of a process or a component is poor, an alarm is given to the operator through an alarm, an alarm, and a warning light (not shown).

In the automatic press fitting assembly process, first, the operator pushes the rotor assembly (110) in the insertion hole (211a) of the holding block (211) of the rotor assembly holding unit (210) The optical sensor 212 senses the erroneous insertion of the shaft 22 of the rotor assembly 20 and the optical sensor 212 detects the erroneous insertion of the shaft 22 of the rotor assembly 20 The movable holder 213 is operated to hold the shaft 22 of the rotor assembly 20 only when normal insertion of the rotor assembly 22 is confirmed.

Then, the operator places the stator assembly 10 in the seating groove 221 with the stator assembly seating jig 220 pressed downward. At this time, the spring (64) elastically supports the stator assembly seating jig (220).

The chuck drive unit 233 is then driven to move the plurality of chucks 231 to clamp the outer circumference of the shaft 13 of the stator assembly 10 mounted in the mount groove 221a. At this time, the shaft support bar 232 firmly supports the lower end of the shaft 13 of the stator assembly 10 mounted in the mounting groove 221.

Then, the operator moves the alignment guide 243 so that the shaft 13 is inserted into the shaft alignment groove 242. By moving the alignment guide 243, the shaft 13 of the stator assembly 10 can be aligned to prevent the assembly failure and eccentricity.

Then, the press-fitting cylinder 90 is operated to lower the head portion 93 and the up-down plate 80 while being guided by the vertical guide rods 60. That is, the rod 92 and the head portion 93 of the press-fitting cylinder 90 descend at a preset pressure and stroke.

In the step of lowering the press-fitting cylinder 90 to press-fit the rotor assembly 20 into the stator assembly 10, the load cell measuring gauge 260 measures the press-fitting pressure of the press-fitting cylinder 90 in real time , The indentation pressure of the indentation cylinder 90 measured by the load cell measurement gauge 260 is displayed on the indicator 261 so that the indentation cylinder 90 is pressed and assembled within a predetermined indentation pressure range.

Then, the movable bolts (not shown) are fastened to the rotor assembly 20 and the stator assembly 10 for full engagement. That is, the operator can use the screwdriver to fasten the movable bolts in the movable bolt holes 21a of the rotor assembly 20 in the left and right directions of the operator (see FIG. 11). Here, since the movable bolt is a conventional fastening means for coupling the rotor assembly 20 and the stator assembly 10, illustration and description thereof are omitted. In addition, the structures provided on the work table 50 for fastening the move bolts should be designed so that the move bolt holes 21a are not covered.

Then, the clamping of the stator assembly 10 and the holding of the rotor assembly 20 are released, the press-fitting cylinder 90 is lifted again, the press-fit assembled outer brushless DC motor is taken out, do.

The stroke measuring unit 270 measures the down position of the up-down plate 80 and the head unit 93 when the press-fitting cylinder 90 is lowered. The safety light sensor 254 measures the position of the down- During the manual operation, the automatic stopping operation is performed when both of the arms are moved, and the pressurizing cylinder 90 is stopped after the head portion 93 is raised.

INDUSTRIAL APPLICABILITY As described above, the present invention improves the productivity and enables automatic or manual press-fitting assembly selection, and minimizes the difference in the defect rate between the skilled person and the unskilled person, so that the uniform quality can be produced.

In addition, it is possible to effectively prevent the defective and eccentricity of the product by measuring the press-in pressure of the press-fitting cylinder in real time on the load-cell measuring gauge and performing the press-

In addition, when inserting the shaft of the rotor assembly into the insertion hole of the holding block, the optical sensor senses the move bolt hole position to confirm misapplication of the rotor assembly, and only when normal insertion of the rotor assembly is confirmed, The movable holder is movable to hold the shaft of the rotor assembly, thereby effectively preventing defective and eccentricity of the product.

10: stator assembly
20: Rotor assembly
50: Workbench
51: frame
60: vertical guide rod
62: auxiliary vertical guide rod
64: spring
70: Horizontal fixing plate
80: Up-down plate
90: Indentation cylinder
91: Body of the press-fitting cylinder
92: Load
93: Head portion
210: Rotor assembly holding unit
211: Holding block
211a: insertion hole
212: Light sensor
213: movable holder
220: stator assembly seating jig
221: seat groove
223: Wire insertion groove
224: main block
226: Connection block
230: stator assembly chucking unit
231: Chuck
233: Shaft Support Rod
235:
240: stator assembly alignment unit
240: stator assembly alignment unit
242: shaft alignment groove
243: Alignment guide
250: control unit
251: Touch control panel
252: Control panel switch
253: Push-in, release switch
255: Foot Switch
260: Load cell measurement gauge
261: Indicator
270: Stroke measuring section
280: Cylinder pneumatic regulator
281: Cork
282: Pressure gauge

Claims (12)

An apparatus for assembling an external brushless DC motor (BLDCM) for press-fitting and assembling a rotor assembly (20) and a stator assembly (10)
A workbench 50 for performing a press-fitting operation;
A plurality of vertical guide rods 60 installed vertically on the work table 50 at a predetermined distance from each other;
A horizontal fixing plate 70 horizontally fixed to the upper end of the vertical guide bar 60;
An up-down plate 80 installed vertically up and down along the vertical guide bar 60 in the middle of the vertical guide bar 60;
A press-fit cylinder 90 fixed to the horizontal fixing plate 70 to up-down the up-down plate 80;
A rotor assembly holding unit 210 installed on the bottom surface of the up-down plate 80 to hold the shaft 22 of the rotor assembly 20;
A stator assembly seating jig 220 which is installed on the work table 50 so as to be able to be elastically lifted up and located below and directly below the rotor assembly holding unit 210 and seats the stator assembly 10;
A stator assembly chucking unit (230) for chucking the stator assembly (10) seated in the stator assembly seating jig (220);
A stator assembly alignment unit (240) for aligning the press-in position of the stator assembly (10) fixed by the stator assembly chucking unit (230); And
The rotor assembly 20 is held by the rotor assembly holding unit 210 and the stator assembly fixed by the stator assembly chucking unit 230 by driving the press- 10. A device for assembling an external brushless DC motor, comprising: a control unit for controlling a series of operations for press-fitting and assembling the external brushless DC motor. The method according to claim 1,
A load cell measuring gauge 260 installed at a lower portion of the seating jig 220 for measuring a press-fitting pressure of the press-fitting cylinder 90; And
And an indicator (261) for indicating the press-in pressure of the press-fitting cylinder (90) measured by the load cell measuring gauge (260). The method according to claim 1,
The rotor assembly holding unit 210 includes:
A holding block 211 having an insertion hole 211a for inserting the shaft 22 of the rotor assembly 20;
An optical sensor 212 for sensing the position of the movable bolt hole 21a of the rotor assembly 20 to prevent the erroneous insertion of the shaft 22 of the rotor assembly 20; And
Only when the optical sensor 212 confirms normal insertion of the shaft 22 of the rotor assembly 20 the rotation of the shaft 22 of the rotor assembly 20, And a movable holder (213) provided on the outer peripheral surface of the movable bracket. The method according to claim 1,
The stator assembly seating jig 220 includes a main block 224 having a seating groove 221 and a wire insertion groove 223 for seating the stator assembly 10 and a coupling 224 connected to the main block 224, Block 226,
One end of the connection block 226 is coupled to the vertical guide rods so as to be able to be lifted up on the work table 50 so that the stator assembly seating jig 220 can be lifted up, 224 are coupled to the auxiliary vertical guide rods 62 and a spring 64 for supporting the stator assembly seating jig 220 is attached to the vertical guide rods 60 and the auxiliary vertical guide rods 62 Wherein the first and second brushless DC motors are mounted on the first and second brushless DC motors. The method of claim 4,
The stator assembly chucking unit 230 includes
A plurality of chucks (231) movably installed to selectively clamp the outer circumference of the shaft (13) of the stator assembly (10) seated in the seating groove (221); And
And a shaft support bar (232) for supporting the lower end of the shaft (13) of the stator assembly (10) mounted in the seating groove (221). The method according to claim 1,
The stator assembly alignment unit 240
And a shaft alignment groove 242 for aligning the shaft 13 of the stator assembly 10 is formed at an end of the alignment jig 220 so as to be slidable with a predetermined length formed on the seating jig 220. [ And a plurality of brushless DC motors. The method according to claim 1,
Further comprising a stroke measuring unit (270) for measuring a down position of the up-down plate (80). The method according to claim 1,
The control unit
A touch control panel 251 for controlling a series operation of press-fitting assembly;
A control panel switch 252;
A press-in release switch 253 for manually actuating the press-in or release; And
And a safety light sensor (254) for safety of the operator,
The touch control panel 251 is operable by automatic operation and manual operation and indicates the progress of the operation. The touch control panel 251 displays an up-down state of the press-fitting cylinder 90 and a rotor assembly (not shown) of the rotor assembly holding unit 210 And controls the holding (noise) and unfreezing (release) of the stator assembly 10 of the stator assembly chucking unit 230 and controls the holding (noise) and unfreezing Interlocked with a foot switch 255 for controlling the unfreezing (release)
The control panel switch 252 includes a control power-on / off switch, an operation manual / automatic switch, an operation button, a stop button, a reset button, a buzzer stop button, and an emergency button switch. DC motor assembling apparatus. The method of claim 8,
The safety light sensor 254 automatically stops when both the worker and the worker enter the robot during automatic and manual operation and stops the pressurizing cylinder 90 after the rotor assembly holding unit 210 is raised Apparatus for assembling an external type brushless DC motor. Inserting the shaft 22 of the rotor assembly 20 into the rotor assembly holding unit 210 in a state in which the press fitting cylinder 90 is raised (S 210);
Determining (S 220) erroneous insertion and normal insertion of the shaft (22) of the rotor assembly (20);
(S 230) holding the shaft (22) of the rotor assembly (20) when normal insertion of the shaft (22) of the rotor assembly (20) is confirmed;
Placing (240) the stator assembly (10) on the stator assembly seating jig (220);
Clamping the stator assembly 10 (S 250);
(S260) aligning the press-fit position of the stator assembly (10) to prevent eccentricity and assembly failure;
(S 270) of lowering the press-fitting cylinder (90) to press-fit the rotor assembly (20) into the stator assembly (10);
Tightening the move bolts (S 280) for additional engagement of the rotor assembly (20) and the stator assembly (10);
Releasing the clamping of the stator assembly 10 (S290); And
And a step (S 300) of raising the press-fitting cylinder (90), taking out the outer brushless DC motor which has been press-fitted and assembled, and transferring the motor to an inspection site (S 300). The method of claim 10,
When the normal insertion of the rotor assembly 20 is confirmed, in the step S 230 of holding the rotor assembly 20, the insertion hole (not shown) of the holding block 211 of the rotor assembly holding unit 210 When the shaft 22 of the rotor assembly 20 is inserted into the rotor assembly 211a, the optical sensor 212 senses the position of the movable bolt hole 21a of the rotor assembly 20, Characterized in that the movable holder (213) is operated to hold the shaft (22) of the rotor assembly (20) only when normal insertion of the shaft (22) of the rotor assembly A method of assembling a typical brushless DC motor. The method of claim 10,
In the step S 230 of pushing and assembling the rotor assembly 20 into the stator assembly by lowering the press-fitting cylinder 90, the load cell measuring gauge 260 is operated to press the press fitting pressure of the press-fitting cylinder 90 And the indentation pressure of the indentation cylinder 90 measured by the load cell measurement gauge 260 is displayed on the indicator 261 so that the indentation cylinder 90 presses in at a predetermined indentation pressure Wherein the outer rotor is provided with a plurality of permanent magnets.

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