KR20230129695A - Temporary assembling apparatus for a hairpin type stator coil and method for temporarily assembling a hairpin type stator coil - Google Patents

Abstract

The present invention relates to a provisional assembly device for a hairpin type stator coil and a method for provisional assembly of a hairpin type stator coil, comprising: a core portion for provisional assembly having a plurality of provisional assembly slots into which a stator coil is erected and inserted in the circumferential direction on an inner circumferential surface; A coil holder on which a plurality of stator coils inserted into the provisional assembly slots are mounted, a robot unit that catches the stator coils mounted on the coil holder and inserts them into the provisional assembly slot, and the stator coils are provisionally assembled into the provisional assembly slots of the core for provisional assembly and then batched. It can be assembled into the coil slot of the stator core at once, simplifying the stator manufacturing process and improving work efficiency.

Description

Temporary assembly device for hairpin type stator coil and provisional assembly method for hairpin type stator coil {TEMPORARY ASSEMBLING APPARATUS FOR A HAIRPIN TYPE STATOR COIL AND METHOD FOR TEMPORARILY ASSEMBLING A HAIRPIN TYPE STATOR COIL}

The present invention relates to a provisional assembly device for a hairpin type stator coil and a method for provisional assembly of a hairpin type stator coil. The provisional assembly for a hairpin type stator coil enables assembly by temporarily assembling the stator coil in a provisional assembly jig and then inserting it into the stator core in batches. The invention relates to a device and a method of temporarily assembling a hairpin type stator coil.

In recent years, with the implementation of greenhouse gas reduction regulations, interest in and demand for electric vehicles are increasing as an alternative to internal combustion engine vehicles.

In order to reduce weight and secure internal space, motors for electric vehicles use hairpin-type stator coils that can maximize the winding area ratio to reduce weight and volume.

The manufacturing method is the forming of the coil, that is, the bending process and the coating removal process are separate. Electric motors that apply a hairpin type stator coil do not wind a general coil or round wire around the stator core, but a stator coil formed in the hairpin type is attached to the stator core. It is assembled by inserting it into a coil slot and then welded to form a stator.

The hairpin type stator coil, or hairpin coil, is a 'U' shaped square copper wire coated with insulation, with straight conductors on both sides, a turn portion connecting the lower ends of both straight conductors, and an insulating coating on the top of both straight conductors. It is provided with a peeled hairpin end.

The hairpin coil is assembled by inserting straight conductor parts on both sides into the coil slots of the stator core, and the turned parts are inserted and aligned between the slots in a structure that entangles each other according to the design of the stator core.

Additionally, the coil slot of the stator core is designed to have an extra depth and an extra width to insert a plurality of hairpin coils assembled in an intertwined structure.

Therefore, when manufacturing a stator, there was the inconvenience of having to assemble a plurality of hairpin coils by inserting them into the coil slots of the stator core and then performing an alignment process of aligning the plurality of hairpin coils in close contact for welding.

In addition, the coil slot of the conventional stator core is designed to have clearance depth and clearance width to insert a plurality of hairpin coils assembled in an intertwined structure, so there is a limit to reducing the size and it is a limitation in designing the stator core of the motor. There was a problem.

Korean Patent No. 2117249 “Alignment device for connecting driving motor hairpin” (registered on May 26, 2020)

The object of the present invention is to provide a provisional assembly device for a hairpin type stator coil and a method for provisional assembly of a hairpin type stator coil, which can be assembled in batches into the coil slots of a stator core after provisional assembly of hairpin coils into the provisional assembly slots of the provisional assembly core. It is to provide.

In addition, another object of the present invention is to reduce the size of the motor and increase the degree of freedom in motor design by eliminating the need to manufacture the coil slot of the stator core to have a clearance width or clearance length, and to provide a hairpin type temporary assembly device for stator coil and a hairpin type. The purpose is to provide a stator coil temporary assembly method.

In order to achieve the above object, an embodiment of the hairpin-type temporary assembly device for a stator coil according to the present invention includes a coil mounting portion on which a plurality of stator coils are mounted, spaced apart from the coil mounting portion, and the inner circumferential surface in the circumferential direction. A core portion for temporary assembly provided with a plurality of temporary assembly slots into which the hairpin coil is erected and inserted; and a robot unit that catches the stator coil mounted on the coil holder and inserts it into the temporary assembly slot.

The temporary assembly slot may have a deeper or wider shape than the coil slot of the stator core portion used for main assembly, and may have a free space for inserting a plurality of stator coils so that they are entangled with each other.

In the present invention, the coil holder is a first holder that is tilted downward to one side with the turn portion of the stator coil over it, and is spaced apart from the first holder and is positioned to be tilted downward to one side with the turn portion of the stator coil over it. A second holder, a first coil elevating and lowering unit located between the first holder and the second holder and lifting the turn portion of the stator coil mounted on the first holder and moving it to the second holder, and a first coil lifting unit that is moved to the second holder. It may include a second coil raising and lowering part that holds the straight conductor part of the stator coil and lifts the stator coil.

In the present invention, one end of the first holder facing the second holder may be placed at a lower position than one end of the second holder facing the one end of the first holder.

In the present invention, the second holder includes a coil stopper portion on which the turn portion of the stator coil is caught, and the coil stopper portion may have a shape that protrudes from the surface of the second holder.

In the present invention, at least one of the first holder and the second holder may be positioned inclined at an angle of 10° to 40°.

One embodiment of the hairpin-type temporary assembly device for a stator coil according to the present invention may further include a coil alignment unit that aligns the position of the stator coil.

One embodiment of the hairpin-type temporary assembly device for a stator coil according to the present invention further includes a coil pressurizing unit that pressurizes the stator coil inserted into the pre-assembly slot, and a coil pressurizing lifting device that moves the coil pressurizing unit up and down. It can be included.

An embodiment of the hairpin-type temporary assembly device for a stator coil according to the present invention may further include a core support portion on which the core portion for provisional assembly is disposed, and a core rotating portion that rotates the core portion for provisional assembly.

One embodiment of the hairpin-type temporary assembly device for stator coils according to the present invention may further include a core transport conveyor unit for transporting the core part for temporary assembly on which provisional assembly of the stator coil dummy has been completed in a pre-designed form.

In the present invention, a coil assembly position support portion supporting the outer circumference of the stator coil dummy may be further included.

One embodiment of the hairpin type temporary assembly device for stator coil according to the present invention is to catch the stator coil formed by a hairpin type stator coil forming device adjacent to the hairpin type temporary assembly device for stator coil and transfer it to the coil holder. It may further include a coil transfer unit.

One embodiment of the hairpin-type stator coil temporary assembly method according to the present invention includes a coil transfer step of transferring the stator coil and mounting it on a coil holder, grabbing the stator coil mounted on the coil holder and inserting it into a temporary assembly slot of the core portion for temporary assembly. A coil pre-assembly step, a coil pressurizing step of pressing the upper end of the stator coil inserted into the provisional assembly slot, and a coil alignment step of aligning the position of the stator coil by pushing the outer portion of the stator coil inserted into the provisional assembly slot inward. It is characterized in that the stator coil dummy is formed while selectively performing the coil pressurizing step and the coil aligning step after the coil temporary assembly step.

In the present invention, the coil holder includes first and second holders that are tilted downward to one side with the turn portion of the hairpin coil overlapping, and the coil transfer step includes supplying the hairpin coil to the first holder. ; and supplying the hairpin coil disposed on the first holder to the second holder.

In the present invention, at least one of the first and second coil holders is inclined at an angle of 10° to 40°, and one end of the first holder facing the second holder faces one end of the first holder. It may be placed in a lower position than one end of the second holder.

The present invention has the effect of simplifying the manufacturing process of the stator and improving work efficiency by allowing the hairpin coil to be pre-assembled into the pre-assembly slot of the pre-assembly core and then assembled into the coil slot of the stator core portion all at once.

In addition, the present invention has the effect of reducing the size of the motor and increasing the degree of freedom in motor design by eliminating the need to manufacture the coil slot of the stator core portion to have an extra width or an extra length.

In addition, the present invention improves process productivity by provisionally assembling the hairpin coil to the core portion for provisional assembly using an articulated robot, and has the effect of facilitating control of production volume by operating a pallet capable of transporting the provisionally assembled core section.

1 is an exploded perspective view of a motor unit according to an embodiment.
Figures 2 and 3 are perspective views showing an embodiment of a temporary assembly device for a hairpin type stator coil according to the present invention.
Figure 4 is a diagram illustrating a general core portion and stator coil.
Figure 5 is a side view showing an embodiment of a coil mounting portion in an embodiment of the temporary assembly device for a hairpin type stator coil according to the present invention.
Figures 6 and 7 are schematic diagrams showing an operation example of the coil mounting portion in one embodiment of the temporary assembly device for a hairpin type stator coil according to the present invention.
Figure 8 is an enlarged perspective view of the core portion for provisional assembly in one embodiment of the provisional assembly device for a hairpin type stator coil according to the present invention.

Hereinafter, the present invention will be described in more detail.

A preferred embodiment of the present invention will be described in detail with the accompanying drawings as follows. Prior to the detailed description of the present invention, the terms or words used in the specification and claims described below should not be construed as limited to their ordinary or dictionary meanings. Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so various equivalents that can replace them at the time of filing the present application It should be understood that variations and variations may exist.

1 is an exploded perspective view of a motor unit 8 according to an embodiment.

Referring to FIG. 1, the motor unit 8 according to the embodiment may include a housing 5, a rotor unit 6, and a stator unit 2.

The housing 5 has a hollow structure inside, and at least one of the upper and lower areas can be open. The housing 5 may include a material that has excellent reliability from the external environment. For example, the housing 5 may include a metal material capable of protecting components disposed therein, such as the rotor unit 6 and the stator unit 2.

And, the open upper and lower areas of the housing 5 may be closed with the upper cover 7a or the lower cover 7b.

The rotor unit 6 may be disposed within the hollow of the housing 5. The rotor unit 6 may have a cylindrical shape and may include a permanent magnet.

The stator unit 2 may be disposed within the hollow of the housing 5. The stator unit 2 may include a core unit 2a and a plurality of stator coils 2n.

The core portion 2a may have a cylindrical shape and have an open upper and lower portion. As an example, the core portion 2a may have a cylindrical shape including a hollow portion. Additionally, the core portion 2a may include a plurality of coil slots 2c. For example, the core portion 2a may include a plurality of coil slots 2c positioned to be spaced apart in the circumferential direction on the hollow inner peripheral surface of the core portion 2a. The plurality of coil slots 2c may have a concave shape from the inner peripheral surface to the outer peripheral surface of the core portion 2a and may have upper and lower portions penetrating. The plurality of coil slots 2c may have the same shape and depth, and may be arranged at equal intervals along the circumferential direction of the inner surface of the core portion 2a.

The plurality of stator coils 2b may be disposed on the core portion 2a. The stator coils 2b may be provided in plural numbers and may be inserted and placed within a plurality of set coil slots 2c.

The stator coil 2b may be a hairpin winding type. If the stator coil 2b has a hairpin winding type, the weight of the motor unit 8 can be reduced and internal space can be effectively secured, and the winding area ratio of the stator coil 2b can be maximized to achieve improved efficiency. there is.

This motor unit 8 can be manufactured through forming, aligning, and inserting the stator coil 2b. Hereinafter, this will be described in more detail through FIGS. 2 to 14.

Figures 2 and 3 are perspective views showing an embodiment of a temporary assembly device for a hairpin-type stator coil according to the present invention, and Figure 3 is a diagram illustrating a general stator core portion and a hairpin coil.

Referring to Figures 2 and 3, an embodiment of the hairpin-type temporary assembly device for a stator coil according to the present invention is a temporary assembly device provided with a plurality of temporary assembly slots 201 into which the stator coil 2b is erected and inserted in the circumferential direction on the inner peripheral surface. Core unit 200 for provisional assembly, a plurality of stator coils 201 inserted into the temporary assembly slots 201 of the core unit 200, a coil holder 210 on which the coils 2b are mounted, and a stator mounted on the coil holder 210. It includes a robot unit 220 that catches the coil 2b and inserts it into the temporary assembly slot 201.

As an example, the robot unit 220 is an articulated robot that includes a plurality of arm parts and a plurality of joints connecting the plurality of arm parts, and has a structure in which the arm part rotates around each joint.

Referring to Figure 4 (a), the core part (2a) is provided with a plurality of coil slots (2c) spaced apart in the circumferential direction on the inner peripheral surface of the hollow part, and Figure 4 (b) and Figure 4 (c) Referring to , the stator coil (2b) has a structure in which straight conductor portions (2d) on both sides are connected to a turn portion (2e) in the middle.

One embodiment of the hairpin-type pre-assembly device for a stator coil according to the present invention includes the stator coil 2b of FIG. 3, that is, a plurality of stator coils having a structure in which straight conductor portions 2d on both sides are connected to a middle turn portion 2e. Hairpin-type stator coil temporary assembly device for temporarily assembling the stator coil (2b) in a pre-designed form in the core portion (200) for provisional assembly in order to collectively insert (2b) into the coil slot (2c) of the core portion (2a). am.

The core portion 200 for temporary assembly has a core body with a hollow portion at the center, and a plurality of temporary assembly slots 201 into which the stator coil 2b is erected and inserted are located on the inner peripheral surface of the core body, and the core used for main assembly is It has the same position as the coil slot 2c of the portion 2a, but has a deeper or wider shape than the coil slot 2c.

The core part 200 for provisional assembly is used for the main assembly of the stator coil 2b, that is, has a deeper depth or a wider width than the coil slot 2c of the core part 2a used during stator manufacturing, so that a plurality of stators can be installed. There is a free space where the coils 2b can be inserted in an intertwined form.

The stator coil 2b is bent and formed by the hairpin type stator coil forming device 10 and then sequentially placed on the coil holder 210.

Although the forming device 10 for a hairpin type stator coil is not shown, an example is to cut a rectangular coil and then bend it into a coil forming unit to form a hairpin type stator coil, that is, the stator coil 2b.

Meanwhile, the robot unit 220 is provided in plural and individually grabs the stator coils 2b mounted on the coil holder 210 and quickly and quickly inserts them into the provisional assembly slot 201 of the core section 200 for provisional assembly. The time for pre-assembly work can be greatly reduced and production capacity can be increased.

The robot unit 220 is mounted on a vertically erected first robot arm 221 and a base table, and a first arm rotation unit 222 rotates the first robot arm 221 in the axial direction of the arm around the erected rotation axis. ), a second robot arm 223 rotatably connected to the first robot arm 221, a second robot arm 223 rotatably connected to the second robot arm 223 and jointly moving, a second robot A third robot arm unit 224 that is rotatably connected to the arm unit 223 and makes joint movements, a fourth robot arm unit 225 that is rotatably connected to the third robot arm unit 224 and makes joint movements, and a fourth robot arm unit ( It is provided on the end side of 225) and includes a coil tongs 226 that hold the stator coil 2b.

The coil tong unit 226 is a movable clamping structure that moves at least one of a pair of tongs to hold or place the stator coil (2b) between the pair of tongs, and a pair of tongs that are alternately hinged rotate around the hinge to hold the tongs. A known clamping structure or jig structure that can hold or place a coil, such as a hinge clamping structure that holds or places the stator coil (2b) while narrowing or opening the end side of the structure, can be implemented in various modifications. A more detailed description will be omitted. Let it be known.

The fourth robot arm unit 225 is rotatably connected to the axial rotary arm member 225a, where the coil tongs 226 are located at the end side, and the third robot arm unit 224, and the axial rotary arm member 225a ) includes a second arm rotation unit 225b that rotates the arm in the axial direction.

The robot unit 220 has a second robot arm unit 223 rotatably connected to the first robot arm unit 221 and performs a joint movement of folding and unfolding, and a third robot arm unit 224 has a second robot arm unit 223. ) is rotatably connected to the joint movement of folding and unfolding, and the fourth robot arm unit 225 is rotatably connected to the third robot arm unit 224 and performs the joint movement of being folded and unfolded.

Although not shown, the joining area between the first robot arm 221 and the second robot arm 223, the joining area between the second robot arm 223 and the third robot arm 224, the third robot arm 224 and Each joint portion of the fourth robot arm 225 is provided with an arm rotation motor for joint movement, and this joint movement structure can be implemented in various modifications using a known multi-joint robot, so further detailed description is omitted. Let it be clear that

That is, the robot unit 220 performs axial rotation of the first robot arm 221, axial rotation of the coil tongs 226, and joint movement of the first robot arm 221 and the second robot arm 223. , the coil is mounted on the coil clamp unit 226 through the joint movement of the second robot arm unit 223 and the third robot arm unit 224, and the joint movement of the third robot arm unit 224 and the fourth robot arm unit 225. The stator coil 2b mounted on the unit 210 can be held and accurately inserted into the corresponding temporary assembly slot 201.

The provisional assembly device for a hairpin-type stator coil according to the present invention further includes a core transfer conveyor section 230 that transfers the provisional assembly core section 200, on which provisional assembly of the hairpin coil dummy has been completed, to the stator coil insertion device in a pre-designed form. do.

The core transfer conveyor unit 230 transfers the provisional assembly core unit 200, on which provisional assembly of the stator coil 2b has been completed, to the stator coil 2b batch insertion device through the operation of the robot unit 220.

The stator coil (2b) batch insertion device is provisionally assembled in the provisional assembly slot 201 of the core for provisional assembly, grabs a pile of hairpin coils with an intertwined structure, and inserts them into the coil slot 2c of the core portion 2a at once to form the stator coil 2b. The assembly work is completed in one insertion process.

The conveyor unit 230 for core transfer can be implemented in various modifications using a known conveyor structure that transfers the core support unit 231 on which the core unit 200 for temporary assembly is placed to a preset position. Please note that the explanation is omitted.

On the other hand, the hairpin-type stator coil temporary assembly device according to the present invention includes a coil transfer unit 240 that catches the stator coil 2b formed by the hairpin-type stator coil forming device 10 and transfers it to the coil holder 210. ) further includes.

The coil transfer unit 240 is a coil transfer jig unit 241 that holds the stator coil 2b formed in the hairpin type stator coil forming apparatus 10, and the coil transfer jig part 241 is connected to the stator coil forming apparatus 10. It includes a jig linear moving part 242 that moves back and forth between (10) and the coil mounting part 210, and a jig raising and lowering part 243 that moves the coil transfer jig part 241 up and down.

The coil transfer jig part 241 is a movable clamping structure that moves at least one of a pair of jigs to hold or place the stator coil 2b formed between the pair of jigs, and a pair of jigs that are hinged in an alternating manner are centered around the hinge. A known clamping jig structure that can hold or place a coil, such as a hinge clamping structure that holds or places the stator coil (2b) by rotating and narrowing or opening the end side of the jig, can be implemented in various modifications, and further detailed descriptions are omitted. Let it be known.

As an example, the jig linear moving part 242 is a ball screw type linear actuator, and in addition, it includes a rack gear and a pinion gear engaged with the rack gear and rotated by a motor, and a rack and pinion that converts the rotational force of the motor into linear movement. It should be noted that since it can be implemented in various modifications using known linear moving devices such as structures, a more detailed description will be omitted.

In addition, the jig raising and lowering unit 243 is an example of a ball screw-type linear actuator, and includes a rack gear and a pinion gear engaged with the rack gear and rotated by a motor, and a rack and pinion that converts the rotational force of the motor into linear movement. It should be noted that it can be implemented in various modifications using known lifting and lowering devices such as structures and hydraulic cylinders, so a more detailed description will be omitted.

The jig linear moving part 242 linearly moves the jig raising and lowering part 243 and the jig part 241 for coil transfer, and the jig raising and lowering part 243 raises and lowers the jig part 241 for coil transfer at the moved position. , move down to grab and lift the stator coil (2b) formed by the hairpin-type stator coil forming device (10), or lower the stator coil (2b) and place it on the coil holder 210.

That is, the coil transfer unit 240 moves the coil transfer jig unit 241 in a straight line between the hairpin-type stator coil forming apparatus 10 and the coil holder 210 while forming the hairpin-type stator coil forming apparatus 10. ), lift the stator coil (2b) formed by and then lower it from the upper side of the coil mounting portion (210) and repeat the process of mounting the stator coil (2b) on the coil mounting portion (210) to create a hairpin type hairpin type. The stator coil (2b) formed by the stator coil forming device 10 is transferred to the coil holder 210.

The hairpin type stator coil forming device 10 is provided with a plurality of coil forming parts for bending and forming the stator coil 2b, and the coil mounting part 210 is configured to hold each stator coil 2b formed in the plurality of coil forming parts. ) are provided in plural form to mount them.

In addition, the coil transfer unit 240 is provided in plural numbers in accordance with the number of coil mounts 210 and the number of coil forming parts, and transfers the plurality of stator coils 2b formed in each coil forming part to the coil mounts 210, respectively. By transferring, productivity can be improved in the provisional assembly process of the stator coil 2b and the stator coil 2b assembly process of the stator.

Meanwhile, Figure 5 is a side view showing an embodiment of the coil mounting portion 210 in an embodiment of the hairpin type temporary assembly device for stator coil according to the present invention, and Figures 6 and 7 are a hairpin type stator coil according to the present invention. This is a schematic diagram showing an operation example of the coil mounting portion 210 in one embodiment of the temporary assembly device for the stator coil.

With reference to FIGS. 5 to 7 , an embodiment of the coil holder 210 in the temporary assembly device for a hairpin-type stator coil according to the present invention will be described in detail below.

The coil holder 210 is a first holder 211 positioned tilted downward to one side over the turn portion 2e of the stator coil 2b, and is spaced apart from the first holder 211 and includes a first holder 211. The second holder 212, which is located higher, is located between the first holder 211 and the second holder 212 and lifts the turn portion 2e of the stator coil 2b mounted on the first holder 211. The first coil elevation unit 213 moves to the second holder 212, and the second coil lifts the stator coil 2b by holding the straight conductor part 2d of the stator coil 2b moved to the second holder 212. Includes a lifting and lowering unit (214).

The coil holder 210 further includes a holder moving part 213 that moves the first holder 211 in a straight line, and the holder moving part 213 moves the first holder 211 from the coil transfer part 240 to the stator coil. (2b) is moved back and forth between the first position where it receives the stator coil (2b) and the second position where it is delivered to the second holder (212).

The first holder 211 receives the stator coil 2b dropped from the coil transfer unit 240 at the first position, is moved to the second position by the holder moving part 213, and transfers the stator coil to the second holder 212. Pass (2b).

Since the first holder 211 is located at the first position, the coil transfer unit 240 can accurately transfer the stator coil 2b to the first holder 211 without malfunction without being caught by surrounding equipment.

The coil holder 210, that is, at least one of the first holder 211 and the second holder 212, is positioned inclined at an angle of 10° to 40° so that the stator coil 2b over which the turn portion 2e is draped It moves smoothly and allows the plurality of stator coils 2b to be mounted stably in order on the first holder 211. As an example, the first and second holders 211 and 212 may be positioned inclined at the same angle, and may be provided at different angles within the angle range described above depending on the weight and quantity of the supplied stator coils 2b. It can be.

If the coil holder 210, that is, the first holder 211, is inclined less than 10°, the stator coil 2b over which the turn part 2e is placed may not move, and the first holder 211 ) is inclined more than 40°, the moving speed of the stator coil (2b) over which the turn portion (2e) is draped is too fast, so that the stator coil (2b) is sequentially moved between the first holder 211 and the second holder 212. Problems such as not being positioned or being positioned overlapping each other may occur.

The second holder 212 is tilted downward to one side with the turn portion 2e of the stator coil 2b moved after being lifted from the first coil elevating portion 213, and the turn portion of the stator coil 2b is placed on one end side. The coil stopper portion 212a on which (2e) is caught protrudes. At this time, the second holder 212 facing the first holder 211 may be located at a different height from the first holder 211. In detail, one end of the first holder 211 that is tilted downward to one side and faces the second holder 212 is longer than one end of the second holder 212 that faces one end of the first holder 211. It can be placed in a low position. Accordingly, the stator coil 2b provided along the inclined surface of the first holder 211 may be sequentially positioned between the first and second holders 211 and 212.

The first coil raising and lowering unit 213 is located between the first holder 211 and the second holder 212 and is a coil on which the turn portion 2e of the stator coil 2b moved along the first holder 211 is seated. It includes a seating member 213a and a first coil raising and lowering device 213b that moves the coil seating member 213a up and down.

The coil seating member 213a fills the gap between the first holder 211 and the second holder 212 so that the stator coil 2b does not fall out between the first holder 211 and the second holder 212 and maintains the stator coil 213a. It is seated at the top of (2b).

The first coil lifting and lowering device (213b) lifts the stator coil (2b) seated on the coil seating member (213a) and moves the turn portion (2e) of the stator coil (2b) to the second holder 212. , the stator coil 2b moved to the second holder 212 moves along the inclined second holder 212 and is stopped by being caught by the coil stopper unit 212a.

The second coil elevating and lowering unit 214 includes a coil elevating jig part 214a that holds the straight conductor part 2d of the stator coil 2b at the lower side of the second holder 212, and a coil elevating jig part 214a. It includes a second coil raising and lowering device (214b) that moves up and down.

The coil lifting jig part 214a is a movable clamping structure that moves at least one of a pair of jigs to hold or place the straight conductor part 2d of the stator coil 2b between the pair of jigs, and is a pair of jigs hinged in an alternating manner. Various modifications are made to the known clamping jig structure that can hold or place the coil, such as a hinge clamping structure that rotates around the hinge so that the end side of the jig narrows or spreads to hold or place the straight conductor portion (2d) of the stator coil (2b). Since it can be implemented, a more detailed description will be omitted.

The coil lifting jig part 214a is placed on the second holder 212 and moves along the second holder 212, and the straight conductor part 2d of the stator coil 2b is stopped by being caught by the coil stopper part 212a. Holding, the second coil lifting and lowering device 214b moves the coil lifting jig part 214a holding the straight conductor part 2d to the upper side to lift the stator coil 2b.

The second coil raising and lowering unit 214 holds the straight conductor part 2d of the stator coil 2b mounted on the second holder 212, lifts the stator coil 2b, and lifts the stator coil 2b to the turn part 2e of the stator coil 2b. ) is placed high on the upper side of the second holder 212 so that the robot unit 220 can easily grasp the turn portion 2e of the stator coil 2b.

That is, the stator coil 2b is formed by the hairpin type stator coil forming device 10 and then transferred by the coil transfer unit 240 to the first holder 211, and is placed on the first holder 211. After the turn part (2e) is draped, it moves along the inclined first holder 211 and places the turn part 2e on the first coil elevation part 213 located between the first holder 211 and the second holder 212. is settled.

Then, the stator coil (2b) is lifted by the first coil elevating and lowering part 213, and the turn part (2e) is placed on the second holder 212, and then moves along the inclined second holder 212 to the coil stopper part ( It is stopped by 212a), and the straight conductor part 2d is caught and lifted by the second coil elevation part 214, so that the turn part 2e is positioned to be spaced apart from the second holder 212.

Accordingly, the robot unit 220 grabs the turn portion 2e of the stator coil 2b lifted by the second coil raising and lowering portion 214 and then moves the straight conductor portion ( 2d) can be inserted smoothly.

Figure 8 is an enlarged perspective view showing the core portion 200 for temporary assembly in an embodiment of the provisional assembly device for the hairpin type stator coil according to the present invention, and referring to Figure 7, the hairpin type stator coil according to the present invention. One embodiment of the provisional assembly device further includes a coil alignment unit 250 that aligns the position of the stator coil 2b by pushing the stator coil 2b inserted into the provisional assembly slot 201 of the core unit 200 for provisional assembly. do.

The coil alignment unit 250 includes an arc-shaped pusher 251 having an arc-shaped contact surface that pushes the stator coil 2b inserted into the temporary assembly slot 201, and a pusher linear moving device 252 that moves the arc pusher back and forth. ) further includes.

The arc-shaped pusher 251 forms an arc identical to the shape of the arc formed along the temporary assembly slot 201, that is, along the outer circumference of the hairpin coil dummy inserted into the coil slot 2c of the core portion 2a. The stator coil 2b inserted into the temporary assembly slot 201 is formed into an arc having the same shape as the circular arc being formed to be the same as the dummy shape of the stator coil 2b inserted into the coil slot 2c of the core portion 2a. can do.

A plurality of coil alignment units 250 are provided to push the pre-assembled stator coils 2b in different directions to align the stator coils 2b within the pre-assembly slot 201.

The provisional assembly slot 201 of the core section 200 for provisional assembly has a deeper depth or a wider width than the coil slot 2c of the core section 2a, so that the core is inserted in such a way that a plurality of stator coils 2b are entangled. It must be arranged in a form that can be collectively inserted into the coil slot 2c of the part 2a.

That is, the coil alignment unit 250 pushes the hairpin coil dummy inserted into the temporary assembly slot 201 inward from the outside of the temporary assembly slot 201 with an arc pusher to align the hairpin coil dummy inserted into the temporary assembly slot 201 to the core portion. Arrange them in a form that can be collectively inserted into the coil slot (2c) of (2a).

A plurality of coil alignment units 250 can be provided to more efficiently align the hairpin coil dummy inserted into the temporary assembly slot 201.

In addition, an embodiment of the hairpin-type temporary assembly device for a stator coil according to the present invention includes a coil pressing unit 260 that presses the stator coil 2b inserted into the temporary assembly slot 201, and a coil pressing unit 260. , further includes a lifting and lowering device 270 for pressurizing the coil that moves downward.

The coil pressing unit 260 is inserted into the provisional assembly slot 201 and pressurizes a plurality of stator coils 2b configured in an intertwined form and inserts them into the provisional assembly slot 201 to create a pile of hairpin coils inserted into the provisional assembly slot 201. The heights are matched to a shape that can be collectively inserted into the coil slot (2c) of the core portion (2a).

In addition, one embodiment of the hairpin-type temporary assembly device for stator coil according to the present invention is located on the core support portion 231, the core portion 200 for provisional assembly is seated on the upper side, and the seated core portion for provisional assembly ( It further includes a core rotation unit 280 that rotates 200).

The core rotation unit 280 rotates the core unit 200 for temporary assembly to rotate the hairpin coil dummy inserted into the temporary assembly slot 201 and aligns it uniformly through the coil alignment unit 250.

In addition, the core rotating part 280 rotates the core part 200 for temporary assembly and positions the stator coil 2b inserted into the temporary assembly slot 201 to pressurize it with the coil pressing part 260, thereby forming the temporary assembly slot 201. The height of the stator coil 2b can be adjusted uniformly by rotating the pile of hairpin coils inserted and pressing them with the coil pressurizing unit 260.

One embodiment of the hairpin-type stator coil temporary assembly device according to the present invention wraps a portion of the outer circumference of the hairpin coil dummy inserted into the temporary assembly slot 201 to support the outer circumference of the hairpin coil dummy to form a core portion for temporary assembly (200). ) may further include a coil assembly position support portion 290 that fixes the position of the hairpin coil dummy during transport.

The coil assembly position support portion 290 is located on the core portion 200 for temporary assembly and is provided with an opening portion 291a for coil alignment through which the coil alignment portion 250 can pass, and a hairpin inserted into the temporary assembly slot 201. It includes a coil position fixing plate member 291 that surrounds and supports a portion of the outer circumference of the coil pile, and a plate support member 292 that is positioned standing on the coil support and supports the position of the coil position fixing plate member 291.

The coil position fixing plate member 291 has an arcuate surface formed on its inner surface to surround and support a portion of the outer circumference of the hairpin coil dummy, and supports the outer portion of the hairpin coil dummy with the arcuate surface to fix the position of the hairpin coil dummy.

As an example, the plate support member 292 is a rod-shaped support body, and is located in plural numbers along the outer circumference of the temporary assembly core portion 200, that is, spaced apart in the circumferential direction to determine the position of the coil position fixing plate member 291. Take support as an example.

The provisional assembly device for a hairpin-type stator coil according to the present invention is a hairpin coil that can be inserted in batches by inserting a plurality of stator coils 2b into the core portion 200 for provisional assembly to complete provisional assembly of the hairpin coil dummy into a pre-designed form. A dummy is formed, and the provisional assembly core unit 200, on which the assembly of the hairpin coil dummy is completed, is transferred to the stator coil 2b batch insertion device through the core transfer conveyor unit 230.

The core transfer conveyor unit 230 moves the core support unit 231 to transfer the core unit 200 for temporary assembly to the stator coil 2b batch insertion device, and at this time, the coil assembly position support unit 290 is used for temporary assembly. By supporting the outer portion of the hairpin coil dummy assembled in the core portion 200, the alignment of the hairpin coil dummy can be stably maintained even when shaken during transport.

Meanwhile, in one embodiment of the hairpin-type stator coil temporary assembly method according to the present invention, the stator coil 2b mounted on the coil holder 210 is held by the robot unit 220 and placed in the temporary assembly slot of the core unit 200 for provisional assembly. It is inserted into (201) to form a pile of hairpin coils that can be collectively inserted into the coil slot (2c) of the core portion (2a).

In more detail, the hairpin-type stator coil temporary assembly method according to the present invention involves transferring the bent and formed stator coil (2b) to the hairpin-type stator coil forming device (10) and mounting it on the coil mounting portion (210). Step, coil provisional assembly step of holding the stator coil (2b) mounted on the coil holder 210 with the robot unit 220 and inserting it into the provisional assembly slot 201 of the core section 200 for provisional assembly, into the provisional assembly slot 201. A coil pressing step of pressing the upper end of the inserted stator coil 2b, that is, the turn portion 2e of the stator coil 2b, and pushing the outer part of the stator coil 2b inserted into the temporary assembly slot 201 inward to press the stator coil 2b. It includes a coil alignment step of aligning the position of the coil 2b.

In addition, the hairpin-type stator coil temporary assembly method according to the present invention is a hairpin that can be collectively inserted into the coil slot 2c of the core portion 2a while selectively performing the coil pressing step and coil alignment step after the coil temporary assembly step. Form a pile of coils.

The present invention simplifies the stator manufacturing process by provisionally assembling the hairpin type stator coil (2b) into the provisional assembly slot (201) of the provisional assembly core and then assembling it all at once into the coil slot (2c) of the core portion (2a). And work efficiency can be improved.

In addition, the present invention does not require the coil slot 2c of the core portion 2a to be manufactured to have an extra width or an extra length, thereby reducing the size of the motor and increasing the degree of freedom when designing the motor.

In addition, the present invention improves process productivity by temporarily assembling the hairpin-type stator coil 2b to the core portion 200 for provisional assembly using an articulated robot, and makes it easy to control production volume by operating a pallet capable of transporting the provisionally assembled core portion. .

It should be noted that the present invention is not limited to the above-described embodiments, but can be implemented with various changes without departing from the gist of the present invention, and these are included in the configuration of the present invention.

2a: Core portion 2b: Stator coil
2c: Coil slot 2d: Straight conductor part
2e: turnbu
200: Core portion for temporary assembly 201: Temporary assembly slot
210: coil holder 211: first holder
212: Second holder 212a: Coil stopper part
213: first coil elevation part 213a: coil seating member
213b: First mounting coil lifting and lowering device 214: Second coil lifting and lowering unit
214a: Jig part for coil elevating 214b: Second coil elevating and lowering device
220: Robot unit 221: First robot arm unit
222: First arm rotation part 223: Second robot arm part
224: 3rd robot arm unit 225: 4th robot arm unit
225a: Axial rotating arm member 225b: Second arm rotating part
226: Clamp unit for coil 230: Conveyor unit for core transfer
240: Coil transfer unit 241: Jig unit for coil transfer
242: Jig straight moving part 243: Jig raising and lowering part
250: Coil alignment unit 251: Arc-shaped pusher
252: Push straight moving device 260: Coil pressurizing part
270: Lifting and lowering device for coil pressurization 280: Core rotation unit
290: Coil assembly position support 291: Coil position fixing plate member
291a: Opening portion for coil alignment 292: Plate support member

Claims (15)

A coil mounting portion on which a plurality of stator coils are mounted; and
a core portion for provisional assembly that is spaced apart from the coil mounting portion and is provided with a plurality of provisional assembly slots on an inner peripheral surface into which the hairpin coil is erected and inserted in the circumferential direction; and
A hairpin-type temporary assembly device for a stator coil, comprising a robot unit that catches the stator coil mounted on the coil holder and inserts it into the temporary assembly slot.
In claim 1,
The temporary assembly slot has a shape that is deeper or wider than the coil slot of the stator core portion used in the main assembly, and has a free space for inserting a plurality of stator coils so that they are entangled with each other. A hairpin type stator coil. Pre-assembly device.
In claim 1,
The coil holder,
a first holder positioned to be tilted downward to one side with a turn portion of the stator coil over it;
a second holder spaced apart from the first holder, over which a turn portion of the stator coil extends, and positioned to be tilted downward to one side;
a first coil elevating and lowering unit located between the first holder and the second holder to lift the turn portion of the stator coil mounted on the first holder and move it to the second holder; and
A hairpin type temporary assembly device for a stator coil, comprising a second coil lifting and lowering part that holds the straight conductor part of the stator coil moved to the second holder and lifts the stator coil.
In claim 3,
A hairpin-type temporary assembly device for a stator coil, wherein one end of the first holder facing the second holder is disposed at a lower position than an end of the second holder facing the one end of the first holder.
In claim 4,
The second holder,
It includes a coil stopper part on which the turn part of the stator coil is caught,
A hairpin-type temporary assembly device for a stator coil, wherein the coil stopper portion has a shape that protrudes from the surface of the second holder.
In claim 3,
A temporary assembly device for a hairpin type stator coil, wherein at least one of the first holder and the second holder is inclined at an angle of 10° to 40°.
In claim 1,
A temporary assembly device for a hairpin type stator coil, further comprising a coil alignment unit for aligning the position of the stator coil.
In claim 1,
a coil pressing unit that pressurizes the stator coil inserted into the provisional assembly slot; and
A temporary assembly device for a hairpin type stator coil, further comprising a coil pressurizing lifting and lowering device that moves the coil pressurizing unit up and down.
In claim 7 or claim 8,
a core support portion on which the core portion for temporary assembly is disposed; and
A hairpin-type temporary assembly device for a stator coil, further comprising a core rotation unit that rotates the provisional assembly core unit.
In claim 1,
A hairpin type temporary assembly device for a stator coil, further comprising a core transfer conveyor unit for transporting the provisional assembly core unit on which provisional assembly of the stator coil dummy has been completed in a pre-designed form.
In claim 10,
A hairpin type temporary assembly device for a stator coil, further comprising a coil assembly position support portion supporting an outer circumference of the stator coil dummy.
In claim 1,
Temporary assembly for a hairpin-type stator coil, characterized in that it further comprises a coil transfer unit that catches the stator coil formed by a hairpin-type stator coil forming device adjacent to the hairpin-type stator coil provisional assembly device and transfers it to the coil holder. Device.
A coil transfer step of transferring the stator coil and mounting it on the coil holder;
A coil temporary assembly step of grabbing the stator coil mounted on the coil holder and inserting it into a temporary assembly slot of the core portion for temporary assembly;
A coil pressurizing step of pressurizing the upper end of the stator coil inserted into the provisional assembly slot; and
It includes a coil alignment step of aligning the position of the stator coil,
A hairpin-type stator coil provisional assembly method, characterized in that the stator coil dummy is formed while selectively performing the coil pressing step and the coil alignment step after the coil provisional assembly step.
In claim 13,
The coil holder includes first and second holders that are tilted downward to one side and over which the turn of the hairpin coil is positioned,
The coil transfer step is,
supplying the hairpin coil to the first holder; and
A hairpin type stator coil provisional assembly method comprising: supplying the hairpin coil disposed on the first holder to the second holder.
In claim 14,
At least one of the first and second coil holders is inclined at an angle of 10° to 40°,
A hairpin type stator coil temporary assembly method in which one end of the first holder facing the second holder is disposed at a lower position than one end of the second holder facing the one end of the first holder.

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