Apparatus for controlling tension of stator coil of vehicle motor

Abstract

According to the present invention, disclosed is an apparatus (100) for controlling tension of a stator coil of a vehicle motor, the apparatus comprising: a pair of left and right coil supply units (110); a pair of first coil feeding units (120); a pair of upper and lower coil tension units (130); a pair of upper and lower first tension buffer units (140); and a second coil feeding unit (150). Before or when the supply of a flat coil (10) of any one of the coil supply units (110) is completed, the flat coil (10) is ready to be supplied to the other coil supply unit (110), the first coil feeding unit (120), the coil tension unit (130), and the first tension buffer unit (140), thereby minimizing waiting time of the flat coil (10).

Description

Stator coil tension control device for vehicle motor

[0001] The present invention relates to a stator coil tension control device for a vehicle motor, which can prepare a secondary bobbin winding and immediately supply it to a nozzle section during or after the primary bobbin winding operation is completed.

[0002] Recently, methods of using flat coils with a square cross-section have been actively explored, and such flat coils can reduce the empty space between coils and increase the space factor compared to annular coils due to their square cross-section shape, and are thus being used as stator coils for drive motors of eco-friendly vehicles requiring high-speed rotation, such as electric vehicles, thereby increasing motor efficiency.

[0003] Meanwhile, as illustrated in FIG. 9, the conventional stator coil winding device includes a flat stator coil bobbin (32) clamped to upper and lower bobbin chucks (31) on which a flat coil is wound, an upper winding rotation part (33) and a lower winding rotation part (34) that rotate the flat stator coil bobbin (32), a winding drive part (35) composed of a servo motor, a coupling (36) extended from the winding drive part (35), and a timing belt (37) connected to the pulleys at the upper and lower ends of the coupling (36), respectively, so that the rotational force of the single-configuration servo motor is transmitted to the upper winding rotation part (33) and the lower winding rotation part (34) through the coupling (36), so that an upper and lower eccentric load is generated, and the winding is performed by the shape of the flat stator coil bobbin (32). Since the tension of the flat coil is not maintained consistently, the flat coil may be twisted and wound, which may cause a problem in that the winding quality deteriorates.

[0004] In addition, when replacing a flat coil, care must be taken to ensure that the direction and twist of the flat coil are taken to ensure that it passes through each roller and is supplied to the nozzle section. However, in the past, when resupplying for replacing a flat coil, there was a problem that the replacement work time was at least several hours or more, which lowered productivity.

[0005] Accordingly, a technology is required to prepare a second bobbin winding during or after the first bobbin winding for a flat coil and immediately supply it to the nozzle section, thereby minimizing the waiting time for the flat coil for replacement.

[0006] Patent Document 1: Korean Patent Publication No. 10-2511276 (Square coil and core for axial magnetic flux motor, March 20, 2023)

[0007] Patent Document 2: Korean Patent Publication No. 10-2023-0170382 (Flat-shaped coil flattening system and method thereof, December 19, 2023)

[0008] The technical problem to be achieved by the idea of ​​the present invention is to provide a stator coil tension control device for a vehicle motor, which prepares a second bobbin winding during or after the first bobbin winding operation and immediately supplies it to a nozzle section, minimizes the waiting time for a flat coil for replacement, and enables continuous winding operation without stopping the line, thereby improving productivity.

[0009] In order to achieve the above-described object, an embodiment of the present invention comprises: a left and right pair of coil supply portions each supplying a flat coil wound on a supply bobbin; a pair of first coil feeding portions formed corresponding to the pair of coil supply portions and supplying the flat coils supplied from the coil supply portions by changing the rolling direction; an upper and lower pair of coil tension portions formed corresponding to the pair of first coil feeding portions and controlling the tension of the flat coil supplied from the first coil feeding portions through a tension feedback signal to maintain it at a constant level; an upper and lower pair of first tension buffer portions formed corresponding to the pair of coil tension portions at a rear end of the coil tension portions and buffering the tension of the flat coil according to the supply speed of the coil supply portions; And a second coil feeding unit formed at the rear end of the first tension buffer unit to measure the tension of the flat coil, generate the tension feedback signal, and feed it back to the coil tension unit; and provides a stator coil tension control device for a vehicle motor, which allows the flat coil to be supplied to the other coil supply unit, the first coil feeding unit, the coil tension unit, and the first tension buffer unit before or when the supply of the flat coil from one of the coil supply units is completed.

[0010] Here, the first tension buffer part is composed of an upper first tension buffer part and a lower first tension buffer part, and the upper first tension buffer part and the lower first tension buffer part are each composed of a tension buffer roller on which the flat coil is wound, a guide block coupled to a fixed shaft of the tension buffer roller, a guide bar guiding the forward and backward sliding of the guide block, a first sensor for detecting a first end sliding position of the guide block, a second sensor for detecting a second end sliding position of the guide block, a pneumatic cylinder for pressurizing the guide block with a constant air pressure from the first end sliding position to the second end sliding position, and a regulator for applying a constant air pressure of the pneumatic cylinder, and when the guide block is detected by the first sensor, the supply speed of the coil supply part is relatively increased, and when the guide block is detected by the second sensor, the speed of the coil supply part is relatively decreased, so that the flat It is possible to buffer the tension of the coil.

[0011] In addition, the first coil feeding unit is composed of an upper first coil feeding unit and a lower first coil feeding unit, and the upper first coil feeding unit and the lower first coil feeding unit are each composed of a first feeding roller that winds the flat portion of the flat coil in a lying state, and a second feeding roller that is formed at the rear end of the first feeding roller and rotates in a direction orthogonal to the rotational direction of the first feeding roller so that the blade portion of the flat coil is wound in a straight state, so that the rolling direction of the flat coil can be switched and supplied.

[0012] In addition, the present invention may further include a pair of second tension buffer sections on the left and right sides formed between the coil supply section and the first coil feeding section to buffer the tension of the flat coil according to the supply speed of the coil supply section.

[0013] In addition, the second tension buffer part is composed of a left second tension buffer part and a right second tension buffer part, and the left second tension buffer part and the right second tension buffer part are each composed of a tension buffer roller on which the flat coil is wound, a guide block coupled to a fixed shaft of the tension buffer roller, a guide bar guiding the forward and backward sliding of the guide block, a first sensor for detecting a first end sliding position of the guide block, a second sensor for detecting a second end sliding position of the guide block, a pneumatic cylinder for pressurizing the guide block with a constant air pressure from the first end sliding position to the second end sliding position, and a regulator for applying a constant air pressure of the pneumatic cylinder, and when the guide block is detected by the first sensor, the supply speed of the coil supply part is relatively increased, and when the guide block is detected by the second sensor, the speed of the coil supply part is relatively decreased, so that the flat coil You can buffer the tension.

[0014] In addition, the second coil feeding unit is formed with a pair of third and fourth feeding rollers at the front and rear sides through which the flat coil is supplied in close contact with the upper surface, and a load cell roller formed between the third feeding roller and the fourth feeding roller so that the evaluation coil is supplied in close contact with the lower surface, and measures the tension amount of the flat coil between the third feeding roller and the fourth feeding roller, and the coil tension unit is formed with an upper coil tension unit corresponding to the upper first tension buffer unit and a lower coil tension unit corresponding to the lower first tension buffer unit, and the upper coil tension unit and the lower coil tension unit are characterized in that they are each formed with a load cell indicator that displays the tension amount, a powder brake controller that receives the tension amount from the load cell indicator, and a powder brake roller that rotates or stops according to the tension amount transmitted from the powder brake controller.

[0015] In addition, the coil supply unit may be composed of a left coil supply unit and a right coil supply unit, and the left coil supply unit and the right coil supply unit may each be composed of a supply bobbin on which the flat coil is wound, a supply motor that rotates the supply bobbin, and a coupling that connects the supply bobbin and the supply motor.

[0016] According to the present invention, before or when the supply of a flat coil from one coil supply section is completed, a flat coil is supplied to another coil supply section, a first coil feeding section, a coil tension section, and a first tension buffer section as a reserve, so that during or after the completion of the first bobbin winding operation, a second bobbin winding is prepared and supplied immediately to the nozzle section, thereby minimizing the waiting time of the flat coil for replacement, thereby enabling continuous winding operation without stopping the line, thereby improving productivity.

[0017] In addition, there is an effect of being able to control and buffer the tension of a flat coil wound with different tensions according to the shape of the flat stator coil bobbin to keep it constant, thereby allowing the coil to be wound with a constant thickness on the flat stator coil bobbin.

[0018] Furthermore, by rotating the flat stator coil bobbin without any vertical load through the synchronous built-in spindle motor, the flat coils are precisely aligned without distortion and wound in multiple layers, and the coaxial rigidity of the spindle shaft of the synchronous built-in spindle motor is maintained in a balanced manner to increase durability, and the synchronous built-in spindle motor is made easy to detach, so that the replacement and maintenance of the synchronous built-in spindle motor can be made easier.

[0019] FIG. 1 is a schematic diagram illustrating a configuration of a stator coil tension adjustment device for a vehicle motor according to an embodiment of the present invention.

[0020] Fig. 2 is a front view of a stator coil tension adjustment device of the vehicle motor of Fig. 1.

[0021] Fig. 3 is a side view of a stator coil tension adjustment device of the vehicle motor of Fig. 1.

[0022] Fig. 4 is a separated view of the coil winding part of the stator coil tension adjusting device of the vehicle motor of Fig. 1.

[0023] Fig. 5 is a separated view of the coil winding part of the stator coil tension control device of the vehicle motor of Fig. 1.

[0024] Fig. 6 illustrates a flat stator coil bobbin of a stator coil tension adjusting device of a vehicle motor of Fig. 1.

[0025] Fig. 7 illustrates the operation of the first tension buffer section of the stator coil tension control device of the vehicle motor of Fig. 1.

[0026] Fig. 8 illustrates the operation of the second tension buffer unit of the stator coil tension control device of the vehicle motor of Fig. 1.

[0027] Fig. 9 illustrates a stator coil winding device of a vehicle motor according to the prior art.

[0028] <Explanation of symbols>

[0029] 10: Flat coil 11: Flat part

[0030] 12: Blade 20: Square stator coil bobbin

[0031] 21: First side 22: Second side

[0032] 23: Corner 24: Bottom cover

[0033] 25: Top cover 110: Coil supply section

[0034] 111: Supply bobbin 112: Supply motor

[0035] 113: Coupling 120: First coil feeding part

[0036] 121: First feeding roller 122: Second feeding roller

[0037] 130: Coil tension section 131: Powder brake roller

[0038] 140: First tension buffer section 141: Tension buffer roller

[0039] 142: Guide block 143: Guide bar

[0040] 150: Second coil feeding section 151: Third feeding roller

[0041] 152: 4th feeding roller 153: Load cell roller

[0042] 160: Nozzle section 170: Coil winding section

[0043] 171: Lower jaw 172: Upper jaw

[0044] 173: Lower cross roller bearing 174: Lower frame

[0045] 175: Lower pulley 176: Upper cross roller bearing

[0046] 177: Top frame 178: Top pulley

[0047] 179: Synchronous built-in spindle motor 180: Forming part

[0048] 190: Second tension buffer section 191: Tension buffer roller

[0049] 192: Guide block 193: Guide bar

[0050] Hereinafter, an embodiment of the present invention having the above-described features will be described in more detail with reference to the attached drawings.

[0051] The stator coil tension control device (100) of a vehicle motor according to an embodiment of the present invention comprises a pair of left and right coil supply parts (110) each supplying a flat coil (10) wound on a supply bobbin (111), a pair of first coil feeding parts (120) formed corresponding to the pair of coil supply parts (110) and supplying the flat coil (10) supplied from the coil supply parts (110) by switching the rolling direction, a pair of upper and lower coil tension parts (130) formed corresponding to the pair of first coil feeding parts (120) and controlling the tension of the flat coil (10) supplied from the first coil feeding part (120) through a tension feedback signal to maintain it at a constant level, and a pair of coil tension parts (130) formed corresponding to the pair of coil tension parts (130) at the rear end of the coil tension parts (130) and supplying the flat coil (10) wound on a supply bobbin (111). The gist of the present invention is to minimize the waiting time of the flat coil (10) by including a pair of upper and lower first tension buffer units (140) for buffering the tension of the flat coil (10) according to the supply speed, and a second coil feeding unit (150) formed at the rear end of the first tension buffer unit (140) for measuring the tension of the flat coil (10) and generating a tension feedback signal to feed it back to the coil tension unit (130), so that before or when the supply of the flat coil (10) of one coil supply unit (110) is completed, the flat coil (10) is supplied to the other coil supply unit (110), the first coil feeding unit (120), the coil tension unit (130), and the first tension buffer unit (140).

[0052] Hereinafter, with reference to FIGS. 1 to 8, the stator coil winding device of the vehicle motor having the above-described configuration will be specifically described as follows.

[0053] First, the coil supply unit (110), as illustrated in FIG. 3, is configured as a left and right pair to supply a flat coil (10) wound on a supply bobbin (111) to the first coil feeding unit (120). That is, the amount of unwinding of the supply bobbin (111) is precisely controlled in accordance with the winding speed of the flat coil (10) by the coil winding unit (170), and the remaining amount of the flat coil (10) can be checked and the replacement time can be identified through a detection sensor (not shown).

[0054] Here, the flat coil (10) has a rectangular cross-sectional structure consisting of a flat portion (11) and a blade portion (12), as illustrated in FIG. 2, and can be wound on a supply bobbin (111) in the rolling direction of the flat portion (11) and supplied to the first coil feeding portion (120).

[0055] Specifically, referring to FIG. 3, the coil supply unit (110) is composed of a left coil supply unit and a right coil supply unit, and the left coil supply unit and the right coil supply unit are each composed of a supply bobbin (111) on which a flat coil (10) is wound, a supply motor (112) that rotates the supply bobbin (111), i.e., a servo motor and a reducer, and a coupling (113) that connects the supply bobbin (111) and the supply motor (112), so that the flat coil (10) can be supplied to the first coil feeding unit (120) corresponding to each.

[0056] Next, the first coil feeding unit (120) is formed as a pair corresponding to a pair of coil supply units (110), and changes the rolling direction of the flat coils (10) supplied from each coil supply unit (110) so that they are aligned without being twisted, and are supplied to each of the upper and lower pairs of coil tension units (130).

[0057] Specifically, referring to FIGS. 2 and 3, the first coil feeding unit (120) is composed of an upper first coil feeding unit and a lower first coil feeding unit, and the upper first coil feeding unit and the lower first coil feeding unit are each composed of a first feeding roller (121) on which a flat portion (11) of a flat coil (10) is wound in a lying state, and a second feeding roller (122) formed at the rear end of the first feeding roller (121) and rotated in a direction orthogonal to the rotational direction of the first feeding roller (121) so that a blade portion (12) of the flat coil (10) is wound in a straight state, thereby switching the rolling direction of the flat coil (10) so as to supply it to the corresponding coil tension unit (130).

[0058] Next, the coil tension unit (130) is formed vertically corresponding to a pair of first coil feeding units (120), and controls the tension of the flat coil (10) supplied from the first coil feeding unit (120) through a tension feedback signal generated and fed back by the second coil feeding unit (150) to maintain it at a certain level, for example, 6 kgf to 12 kgf, thereby enabling the flat coil (10) to be wound with a uniform thickness on the coil winding unit (170), and preventing an overload from being applied to the synchronous built-in spindle motor (179) of the coil winding unit (170).

[0059] Specifically, referring to FIG. 2, the coil tension unit (130) is composed of an upper coil tension unit corresponding to the upper first tension buffer unit and a lower coil tension unit corresponding to the lower first tension buffer unit, and the upper coil tension unit and the coil tension unit may each be composed of a load cell indicator (not shown) that displays the amount of tension, a powder brake controller (not shown) that receives the amount of tension from the load cell indicator, and a powder brake roller (131) that rotates or stops according to the amount of tension transmitted from the powder brake controller to supply or temporarily stop the flat coil (10).

[0060] That is, according to the tension feedback signal, the powder brake roller (131) can be rotated or stopped to control the tension of the flat coil (10) and maintain it at a certain level.

[0061] Next, the first tension buffer unit (140) is formed at the rear end of the coil tension unit (130) corresponding to a pair of coil tension units (130), and buffers the tension of the flat coil (10) according to the supply speed of the flat coil (10) by each coil supply unit (110), so that the tension of the flat coil (10) can be maintained at a constant level in response to a relatively fast supply speed or a relatively slow supply speed that is outside a preset range.

[0062] Accordingly, when winding a flat coil (10) by rotation of a flat stator coil bobbin (20) as in FIG. 6, the tension of the flat coil (10) may be different depending on each winding for the first side (21) corresponding to the long side and the second side (22) and the corner (23) corresponding to the cross-section, and the different tensions can be maintained at a constant level through the coil tension unit (130) and the first tension buffer unit (140), so that the flat coil (10) can be wound on the flat stator coil bobbin (20) with a constant tension.

[0063] Specifically, as illustrated in FIGS. 2, 3 and 7, the first tension buffer unit (140) is formed between the powder brake roller (131) and the guide roller (144) on the supply path of the flat coil (10), and includes a tension buffer roller (141) on which the flat coil (10) is wound, a guide block (142) coupled to the fixed shaft of the tension buffer roller (141), a guide bar (143) that engages with the guide block (142) to guide the forward and backward sliding of the guide block (142), a first sensor (145) that detects the first end sliding position of the guide block (142), a second sensor (146) that detects the second end sliding position of the guide block (142), and a pressure sensor that pressurizes the guide block (142) from the first end sliding position to the second end sliding position with a constant air pressure. It may be composed of a pneumatic cylinder (not shown) and a regulator (not shown) that applies a certain pneumatic pressure to the pneumatic cylinder.

[0064] Here, the first sensor (145) and the second sensor (146) may be limit switches, but are not particularly limited thereto, and the pneumatic cylinder may pressurize the tension buffer roller (141) with a certain pneumatic pressure toward the second end sliding position, and when the tension of the flat coil (10) increases, the tension buffer roller (141) may slide and move toward the first end sliding position.

[0065] In addition, a guide groove (148) is formed corresponding to the length of the guide bar (143) on a fixed side frame (147) formed upright so that the powder brake roller (131), the tension buffer roller (141), and the guide roller (144) can rotate, and a stopper (149) coupled to the upper end of the guide block (142) can slide back and forth along the guide groove (148), and the end of the stopper (149) can contact the first sensor (145) or the second sensor (146) to detect the forward and backward sliding position of the tension buffer roller (141), respectively.

[0066] Accordingly, from (a) to (b) of FIG. 7, when the guide block (142) is detected by the first sensor (145), the supply speed of the coil supply unit (110) is relatively increased to release the flat coil (10) and make the passage length of the flat coil (10) relatively longer to increase the tension, and from (b) to (a) of FIG. 7, when the guide block (142) is detected by the second sensor (146), the supply speed of the coil supply unit (110) is relatively decreased to make the passage length of the flat coil (10) relatively shorter to lower the tension, thereby buffering the tension of the flat coil (10) within a certain range and buffering the tension of the flat coil (10) transferred to the powder brake roller (131) in accordance with the winding speed of the coil winding unit (170).

[0067] Meanwhile, referring to FIG. 3, a pair of second tension buffer units (190) on the left and right sides are further included to buffer the tension of the flat coil (10) according to the supply speed of the coil supply unit (110), which are formed between the coil supply unit (110) and the first coil feeding unit (120), so that the second tension buffer unit (190) buffers the tension of the flat coil (10) according to the supply speed of the flat coil (10) by the coil supply unit (110), so that the tension of the flat coil (10) can be maintained at a constant level in response to a relatively fast supply speed or a relatively slow supply speed that is out of a preset range.

[0068] Specifically, as illustrated in FIGS. 2, 3 and 8, the second tension buffer unit (190) is composed of a left second tension buffer unit and a right second tension buffer unit, and the left second tension buffer unit and the right second tension buffer unit are formed between a supply roller (194) and a first feeding roller (121) on a supply path of a flat coil (10), and each includes a tension buffer roller (191) on which a flat coil (10) is wound, a guide block (192) coupled to a fixed shaft of the tension buffer roller (191), a guide bar (193) that guides the forward and backward sliding of the guide block (192), a first sensor (195) that detects a first end sliding position of the guide block (192) by engaging with the guide block (192), and a second sensor (196) that detects a second end sliding position of the guide block (192). It may be composed of a second sensor (196), a pneumatic cylinder (not shown) that pressurizes the guide block (192) from the first end sliding position to the second end sliding position with a constant pneumatic pressure, and a regulator (not shown) that applies a constant pneumatic pressure to the pneumatic cylinder.

[0069] Here, the first sensor (195) and the second sensor (196) may be limit switches, but are not particularly limited thereto, and the pneumatic cylinder may pressurize the tension buffer roller (191) with a certain pneumatic pressure toward the second end sliding position, and when the tension of the flat coil (10) increases, the tension buffer roller (191) may slide and move toward the first end sliding position.

[0070] In addition, the pneumatic cylinder can pressurize the tension buffer roller (191) with a certain pneumatic pressure toward the second end sliding position, and when the tension of the flat coil (10) increases, the tension buffer roller (191) can slide and move toward the first end sliding position.

[0071] In addition, a guide groove (198) is formed corresponding to the length of the guide bar (193) in a fixed side frame (197) formed upright so that the first feeding roller (121), the tension buffer roller (191), and the supply roller (194) can rotate, and a stopper (199) coupled to the upper end of the guide block (192) can slide back and forth along the guide groove (198), and the end of the stopper (199) can contact the first sensor (195) or the second sensor (196) to detect the forward and backward sliding position of the tension buffer roller (191), respectively.

[0072] Accordingly, from (b) to (a) of FIG. 8, when the guide block (192) is detected by the first sensor (195), the supply speed of the coil supply unit (110) is relatively increased to release the flat coil (10) and make the passage length of the flat coil (10) relatively longer to increase the tension, and from (a) to (b) of FIG. 8, when the guide block (192) is detected by the second sensor (196), the supply speed of the coil supply unit (110) is relatively decreased to make the passage length of the flat coil (10) relatively shorter to lower the tension, thereby buffering the tension of the flat coil (10) within a certain range and buffering the tension of the flat coil (10) transferred to the powder brake roller (131) in accordance with the winding speed of the coil winding unit (170).

[0073] Next, the second coil feeding unit (150) is formed in a single configuration at the rear end of the first tension buffer unit (140) to measure the tension of the passing flat coil (10) and generate a tension feedback signal to feed it back to the corresponding coil tension unit (130) in real time.

[0074] Specifically, as illustrated in FIG. 2, the second coil feeding section (150) may be configured with a pair of third feeding rollers (151) and fourth feeding rollers (152) formed in the front and rear, through which the flat coil (10) is supplied in close contact with the upper surface, and a load cell roller (153) formed between the third feeding roller (151) and the fourth feeding roller (152), through which the flat coil (10) is supplied in close contact with the lower surface, and which measures the tension amount of the flat coil (10) between the third feeding roller (151) and the fourth feeding roller (152).

[0075] Accordingly, the load cell roller (153) can be raised and lowered according to the tension of the flat coil (10) passing between the third feeding roller (151) and the fourth feeding roller (152) to generate a tension feedback signal.

[0076] Next, the nozzle unit (160) is configured to ascend and descend to control the supply position of the flat coil (10). For example, referring to FIGS. 1 and 8, the upper and lower supply positions of the coil winding unit (170) of the flat coil (10) supplied from the second coil feeding unit (150) to the flat stator coil bobbin (20) are controlled, and when winding is completed, the flat coil (10) is wound on the flat stator coil bobbin (20) to ascend or descend, thereby allowing the flat coil (10) to be wound in multiple layers.

[0077] That is, the nozzle section (160) can supply the flat section (11) of the flat coil (10) whose rolling direction has been changed by the first coil feeding section (120) to the coil winding section (170) so that it is wound in close contact with the flat stator coil bobbin (20).

[0078] Meanwhile, although not shown, the nozzle unit (160) includes a winding detection sensor that detects the presence and length of the flat coil (10), so that when the flat coil (10) is not detected or the winding of the flat coil (10) of a preset length for the flat stator coil bobbin (20) is completed, the operation of the coil supply unit (110) and the coil winding unit (170) can be stopped and the flat stator coil bobbin (20) can be replaced.

[0079] Next, the coil winding unit (170) winds the flat coil (10) supplied from the nozzle unit (160) onto the flat stator coil bobbin (20) at a speed of 300 rpm, and provides the same rotational force to the upper and lower ends of the flat stator coil bobbin (20) through a synchronous built-in spindle motor (179), thereby rotating the flat stator coil bobbin (20) without an upper and lower uneven load, thereby winding the flat coil (10).

[0080] Specifically, as illustrated in FIGS. 4 to 6, the coil winding part (170) includes a lower chuck (171) that clamps the lower part of the flat stator coil bobbin (20), i.e., the lower cover (24), so that it is seated and fixed, an upper chuck (172) that slides up and down to clamp the upper part of the flat stator coil bobbin (20), i.e., the upper cover (25), so that it is pressurized and fixed, a lower cross roller bearing (173) that guides the rotation of the rotation shaft coupled to the lower chuck (171), a lower frame (174) on which the lower cross roller bearing (173) is formed, a lower pulley (175) that is coupled to the rotation shaft of the lower chuck (171), an upper cross roller bearing (176) that guides the rotation of the rotation shaft coupled to the upper chuck (172), and an upper frame (177) on which the upper cross roller bearing (176) is formed. It may be composed of an upper pulley (178) coupled to the rotation axis of the upper chuck (172), a synchronous built-in spindle motor (179) connected to the lower pulley (175) and the upper pulley (178) by a timing belt (T) to provide a synchronous rotational force to both ends, and an encoder (not shown) that detects the rotational speed of the synchronous built-in spindle motor (179).

[0081] Through this structure, referring to FIG. 5, the lower cover (24) of the stator coil bobbin (20) is fixed by being placed on the lower chuck (171) (a), the upper chuck (172) is lowered to pressurize and fix the upper cover (25), and the starting end of the flat coil (10) is placed at the winding start position of the stator coil bobbin (20), and then the flat coil (10) can be wound by the rotational force transmitted from the synchronous built-in spindle motor (179).

[0082] Accordingly, a synchronous built-in spindle motor (179) is vertically arranged between the lower frame (174) and the upper frame (177), and the same rotational force is transmitted through a timing belt (T) via a pulley (179b) coupled to a spindle shaft (179a) extended at each end, thereby synchronizing the rotation of the lower chuck (171) and the upper chuck (172), thereby precisely aligning and winding a flat coil (10) on the stator coil bobbin (20) without an eccentric load between the upper and lower ends, and maintaining the coaxial rigidity of the spindle shaft (179a) in a balanced manner, and making it easy to separate the synchronous built-in spindle motor (179) from the lower frame (174) and the upper frame (177), thereby making it easier to replace and maintain the synchronous built-in spindle motor (179).

[0083] In addition, by applying a lower cross roller bearing (173) and an upper cross roller bearing (176) consisting of a rotatable inner ring and a fixed outer ring, the rotation of the lower chuck (171) and the upper chuck (172) can be stably guided, while the durability and rigidity can be increased in opposition to the high-speed rotation of the lower chuck (171) and the upper chuck (172).

[0084] Meanwhile, as illustrated in FIG. 7, the synchronous built-in spindle motor (179) is composed of a spindle shaft (179a), a housing (179c), a bearing (179d) that guides the rotation of the spindle shaft (179a), a built-in motor (179e), an encoder (not shown) that measures the rotation of the spindle shaft (179a), and an encoder cable (179f) connected to the encoder, so that the spindle shaft (179a) can be rotated at a maximum of 8,000 rpm through the built-in motor (179e) to synchronize the rotation of the lower chuck (171) and the upper chuck (172).

[0085] Meanwhile, as illustrated in FIGS. 5, 6 and 9, the coil winding section (170) further includes a pair of first guide vanes (171a) that move up and down in conjunction with each other on the first side (21) corresponding to the long sides of the flat stator coil bobbin (20), and a pair of second guide vanes (171b) that move up and down in conjunction with each other on the second side (22) corresponding to the short side of the flat stator coil bobbin (20), and the pair of first guide vanes (171a) and the pair of second guide vanes (171b) maintain a gap (G) equal to the blade width of the flat coil (10) so as to sequentially align the flat coil (10) without warping and wind it in multiple layers.

[0086] Next, the forming part (180) forms the end of the flat coil (10) wound on the flat stator coil bobbin (20) into a specific shape.

[0087] Meanwhile, another embodiment of the present invention provides a flat stator coil wound by the stator coil winding device of the aforementioned vehicle motor.

[0088] Accordingly, by the configuration of the stator coil winding device of the vehicle motor as described above, the exhausted primary bobbin is replaced, and the winding work is performed through the secondary bobbin prepared in advance, so that, before or when the supply of the flat coil from one coil supply section is completed, the flat coil is supplied to the other coil supply section, the first coil feeding section, the coil tension section, and the first tension buffer section as a reserve, so that the secondary bobbin winding is prepared during or after the winding of the primary bobbin and supplied immediately to the nozzle section, and the waiting time for the flat coil for replacement is minimized, so that continuous winding work is possible without stopping the line, thereby improving productivity, and the tension of the flat coil wound with different tensions according to the shape of the flat stator coil bobbin is adjusted and buffered to maintain it constant, so that the flat coil is wound with a constant thickness on the flat stator coil bobbin, and the flat stator coil bobbin is moved up and down through a synchronous built-in spindle motor. By rotating in conjunction without bias load, the flat coils are precisely aligned without distortion and wound in multiple layers, and the coaxial rigidity of the spindle shaft of the synchronous built-in spindle motor is maintained in a balanced manner to increase durability, and the synchronous built-in spindle motor can be easily detached to make replacement and maintenance of the synchronous built-in spindle motor easier.

[0089] The embodiments described in this specification and the configurations illustrated in the drawings are only the most preferred embodiments of the present invention and do not represent all of the technical ideas of the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

Claims

1. A pair of left and right coil supply sections each supplying a flat coil wound on a supply bobbin; A pair of first coil feeding sections formed corresponding to the pair of coil supply sections and supplying the flat coils supplied from the coil supply sections by changing the rolling direction; A pair of upper and lower coil tension sections formed corresponding to the pair of first coil feeding sections, and controlling the tension of the flat coil supplied from the first coil feeding section through a tension feedback signal to maintain it at a constant level; A pair of upper and lower first tension buffer parts corresponding to the pair of coil tension parts and formed at the rear end of the coil tension parts to buffer the tension of the flat coil according to the supply speed of the coil supply part; and A second coil feeding unit formed at the rear end of the first tension buffer unit, which measures the tension of the flat coil, generates the tension feedback signal, and feeds it back to the coil tension unit; Before or upon completion of supply of the flat coil of one of the coil supply units, the flat coil is placed on standby for supply to another of the coil supply units, the first coil feeding unit, the coil tension unit, and the first tension buffer unit. Stator coil tension control device for a vehicle motor.

2. In paragraph 1, The above first tension buffer section is composed of an upper first tension buffer section and a lower first tension buffer section, The upper first tension buffer section and the lower first tension buffer section are, respectively, It is composed of a tension buffer roller having the above-mentioned flat coil wound thereon, a guide block coupled to a fixed shaft of the tension buffer roller, a guide bar guiding the forward and backward sliding of the guide block, a first sensor detecting a first end sliding position of the guide block, a second sensor detecting a second end sliding position of the guide block, a pneumatic cylinder pressurizing the guide block with a constant air pressure from the first end sliding position to the second end sliding position, and a regulator applying a constant air pressure to the pneumatic cylinder. When the guide block is detected by the first sensor, the supply speed of the coil supply part is relatively increased, and when the guide block is detected by the second sensor, the speed of the coil supply part is relatively decreased, thereby buffering the tension of the flat coil. Stator coil tension control device for a vehicle motor.

3. In paragraph 1, The above first coil feeding section is composed of an upper first coil feeding section and a lower first coil feeding section, The upper first coil feeding part and the lower first coil feeding part are, respectively, It is characterized in that it is composed of a first feeding roller that winds the flat part of the flat coil in a lying state, and a second feeding roller that is formed at the rear end of the first feeding roller and rotates in a direction orthogonal to the rotational direction of the first feeding roller so that the blade part of the flat coil is wound in a straight state, thereby changing the rolling direction of the flat coil and supplying it. Stator coil winding device for a vehicle motor.

4. In paragraph 1, It is characterized in that it further includes a pair of second tension buffer parts on the left and right sides formed between the coil supply part and the first coil feeding part, and buffering the tension of the flat coil according to the supply speed of the coil supply part. Stator coil tension control device for a vehicle motor.

5. In paragraph 4, The second tension buffer section is composed of a left second tension buffer section and a right second tension buffer section, The second tension buffer section on the left and the second tension buffer section on the right are, respectively, It is composed of a tension buffer roller having the above-mentioned flat coil wound thereon, a guide block coupled to a fixed shaft of the tension buffer roller, a guide bar guiding the forward and backward sliding of the guide block, a first sensor detecting a first end sliding position of the guide block, a second sensor detecting a second end sliding position of the guide block, a pneumatic cylinder pressurizing the guide block with a constant air pressure from the first end sliding position to the second end sliding position, and a regulator applying a constant air pressure to the pneumatic cylinder. When the guide block is detected by the first sensor, the supply speed of the coil supply part is relatively increased, and when the guide block is detected by the second sensor, the speed of the coil supply part is relatively decreased, thereby buffering the tension of the flat coil. Stator coil tension control device for a vehicle motor.

6. In paragraph 2, The second coil feeding section is composed of a pair of third and fourth feeding rollers, which are formed between the third feeding roller and the fourth feeding roller, through which the flat coil is supplied in close contact with the upper surface, and a load cell roller which measures the tension amount of the flat coil between the third feeding roller and the fourth feeding roller, through which the evaluation coil is supplied in close contact with the lower surface. The above coil tension part is composed of an upper coil tension part corresponding to the upper first tension buffer part and a lower coil tension part corresponding to the lower first tension buffer part, The upper coil tension part and the coil tension part are, respectively, It is characterized by comprising a load cell indicator that displays the tension amount, a powder brake controller that receives the tension amount from the load cell indicator, and a powder brake roller that rotates or stops according to the tension amount transmitted from the powder brake controller. Stator coil tension control device for a vehicle motor.

7. In paragraph 1, The above coil supply unit is composed of a left coil supply unit and a right coil supply unit, The above left coil supply unit and the above right coil supply unit are, respectively, It is characterized by comprising a supply bobbin on which the flat coil is wound, a supply motor that rotates the supply bobbin, and a coupling that connects the supply bobbin and the supply motor. Stator coil tension control device for a vehicle motor.

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