JP4992527B2 - Stator assembly apparatus and stator assembly method - Google Patents

Description

  The present invention relates to an apparatus and method used when a stator is assembled to a motor case.

For example, a motor part of a drive system in a so-called hybrid vehicle and a motor part such as an electric vehicle are configured by assembling a stator in a cylindrical motor case.
The stator is formed by attaching a coil to a slot portion provided in the stator core, and the coil end portion is exposed from both axial end surfaces of the stator core.

  The coil end portion is made of a conductor with an insulation coating that constitutes the coil, and if the insulation coating is damaged, there is a risk of problems in electrical insulation. For this reason, when assembling the stator to the motor case, it is necessary for the operator to work with great care so that the coil end portion does not come into contact with the motor case and is damaged.

In addition, in order to make it easy for the operator to align the motor case and the stator, a positioning pin is set up in a fixing hole provided in a seat surface on which the stator is arranged in the motor case, and this positioning pin is used for inserting a stator bolt. There is a case where the work is performed to fit the through hole. However, the positioning of the through hole and the positioning pin is not always easy, and it is necessary to carefully adjust the positional relationship between the two and work carefully, and there is a need for easier work and improved reliability. It was.
Various devices have been proposed for use in assembling the motor (see Patent Document 1), but this does not necessarily meet the ease of stator assembly work.

JP 2005-168098 A

  The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a stator assembling apparatus and a stator assembling method capable of facilitating work and improving reliability when the stator is assembled to the motor case. To do.

A first invention is a stator assembling device for assembling a stator formed by mounting a coil on a ring-shaped stator core in a substantially cylindrical motor case,
A guide rod that is erected at the center position in the motor case with the axial direction directed in the vertical direction, and whose upper end position is located above the upper end of the motor case;
A holding portion that holds the stator from the inner peripheral surface side, and an arm portion that supports the holding portion so as to be movable in the vertical and horizontal directions and the circumferential direction and assists the force when moving the stator held by the holding portion. And a stator moving means provided with
A rod engaging portion that engages with the guide rod and guides the moving direction of the vertical movement of the holding portion is provided at the lower end portion of the center position of the holding portion in the stator moving means. It exists in a stator assembly | attachment apparatus (Claim 1).

  As described above, the stator assembling apparatus of the present invention has the guide rod and the stator moving means, and the rod engaging portion is provided in the holding portion of the stator moving means. Thereby, the stator assembling method of the second invention described later can be easily executed, and the assembling work of the stator to the motor case can be easily and accurately performed.

A second invention is a stator assembling method for assembling a stator formed by mounting a coil on a ring-shaped stator core in a substantially cylindrical motor case,
A rod erecting step of erecting a guide rod at the center position in the motor case with the axial direction facing up and down, and positioning the upper end position of the guide rod above the upper end position of the motor case;
A holding portion that holds the stator from the inner peripheral surface side, and an arm portion that supports the holding portion so as to be movable in the vertical and horizontal directions and the circumferential direction and assists the force when moving the stator held by the holding portion. Using a stator moving means provided with a bar engaging portion that engages with the guide rod and guides the moving direction of the vertical movement of the holding portion at the center position of the holding portion. A stator holding step of holding by the part,
An axis adjustment step of moving the holding portion holding the stator to engage the rod engaging portion and the guide rod so that the axes of the stator and the motor case coincide with each other;
And a mounting step of placing the stator on the seat surface of the motor case by lowering the holding portion while engaging the rod engaging portion and the guide rod. There is an assembly method (Claim 6).

  According to the stator assembling method of the present invention, the shaft center adjusting step is performed after the rod standing step. In the rod erecting step, the guide rod is protruded so as to be located above the upper end position at the center position in the motor case. For this reason, when the shaft center adjustment step is performed, the upper end portion of the guide rod and the lower end portion of the rod engaging portion are engaged. It can be easily avoided that the part comes into contact with other surrounding parts.

  In the subsequent placing step, the holding portion is lowered while the rod engaging portion and the guide rod are engaged, so that the state where the shaft centers of the stator and the motor case match is maintained. Therefore, it is possible to reliably avoid contact of the coil end portion of the stator with the inner peripheral surface of the motor case.

  As described above, according to the stator assembling method of the present invention, the coil end portion of the stator is replaced with the other by performing at least the rod standing step, the stator holding step, the shaft center adjusting step, and the placing step. Assembling can be performed while easily avoiding contact with the part, and the stator assembling work can be facilitated and the reliability can be improved.

In the first invention, the lower end position of the bar engaging portion may be configured to be the same as or lower than the lower end position of the stator when the holding portion holds the stator. Preferred (claim 2).
In the second invention, in the stator holding step, it is preferable that the stator is held by the holding portion so that the rod engaging portion is positioned at the same position as or lower than the lower end position of the stator ( Claim 7).
In this case, it is possible to more easily avoid contact of the coil end portion of the stator with other parts such as a guide rod.

  The motor case is provided with a seating surface for supporting the stator, and a fixing hole facing the through hole penetrating the stator is formed in the fixing hole. A positioning pin for positioning in the circumferential direction through the hole can be erected, and the upper end position of the guide bar is located above the upper end position of the positioning pin erected on the motor case. It is preferable to be provided (claim 3).

In the second invention, at least prior to the shaft center adjustment step, the fixing hole provided on the seat surface supporting the stator of the motor case and facing the through hole penetrating the stator is provided. And a pin erecting step for erecting a positioning pin for positioning in the circumferential direction through the through hole of the stator,
In the bar erecting step, the upper end position of the guide bar is positioned above the upper end position of the positioning pin,
It is preferable that after the axial center adjusting step, there is a circumferential direction adjusting step of adjusting the circumferential position of the holding portion to align the through hole and the axial center of the positioning pin.

In this case, the circumferential position of the stator and the motor case can be easily and reliably adjusted by performing the pin erection step and the circumferential direction adjustment step. And since the said circumferential direction adjustment process is performed after performing the said axial center adjustment process, the circumferential direction movement of a stator is possible, maintaining the alignment state of an axial center, and the alignment of the circumferential direction is extremely more than before. It becomes easy.
Further, the order of performing the pin erection step may be before the shaft center adjustment step, and may be performed before the rod erection step as shown in the examples described later, or after the bar erection step. You may go.
Note that the pin erection process using this positioning pin is not an essential process, and it is possible to use a technique such as adjusting the circumferential position using some jig from the outer peripheral side of the stator without using the positioning pin. Of course.

The guide rod and the rod engaging portion are configured to engage with each other by inserting the other end portion into a bottomed engagement hole provided at one end portion, and the guide It is preferable that the rod is configured to be movable downward as the holding portion descends while maintaining the engagement relationship with the rod engaging portion (claims 3 and 7).
In this case, when the holding portion and the stator held by the holding portion are lowered, the engagement relationship between the guide rod and the rod engaging portion is reliably maintained without changing the relative position between the guide rod and the rod engaging portion. It is possible to maintain the coincidence state of the axis of the stator and the motor case more stably.

Further, the stator assembling apparatus has a conveyor for transporting the motor case, and the guide rod is moved upward along the center position from below the motor case that has reached a predetermined position. Preferably, it is provided with a guide rod raising / lowering means for raising the guide rod.
In this case, the stator assembly operation can be performed with the motor case mounted on the conveyor, and the guide rod can be raised only when necessary by providing the guide rod lifting means. it can. Therefore, before and after the stator assembly operation, the motor case can be easily conveyed by the conveyor while avoiding interference with the guide rod.

Example 1
A stator assembling apparatus and a stator assembling method according to an embodiment of the present invention will be described with reference to FIGS.
As shown in FIG. 1, the stator assembling apparatus 1 of the present example includes a stator 8 formed by attaching a coil to a ring-shaped stator core 81 and exposing coil end portions 82 from both axial ends of the stator core 81. This is a stator assembling device for assembling in the motor case 9.

  As shown in FIGS. 1 and 2, the stator assembling apparatus 1 has a conveyor 11 that conveys a motor case 9 placed on a pallet 95 with the axial direction set up and down. 8 has a stator storage 15 in which 8 is placed. Then, adjacent to these, the holding portion 31 that holds the stator 8 from the inner peripheral surface side, and the stator 8 that holds the holding portion 31 movably in the vertical and horizontal directions and in the circumferential direction and moves on the holding portion 31 are moved The stator moving means 3 provided with the arm part 32 which assists the force at the time of making it provide is provided.

  The arm portion 32 of the stator moving means 3 is a well-known assist means, also called a balance arm, and a heavy object connected to the tip head portion 321 only by applying a light operating force to the tip head portion 321. Is configured to be easily movable. In this example, the holding portion 31 is disposed on the tip head portion 321 of the arm portion 32.

  As shown in FIGS. 3 and 4, the holding portion 31 has three opening / closing portions 312 that protrude radially outward from the outer peripheral surface of the central shaft portion 310 and that can be moved back and forth in the radial direction. Are provided with contact piece portions 313 each having an arcuate outer surface to be brought into contact with the inner peripheral surface of the stator 8. By operating a drive source (not shown), the opening / closing part 312 and the contact piece part 313 are opened and closed, and the stator core 8 can be held and released.

Further, a rod engaging portion 35 is provided at the lower end portion of the central shaft portion 310 of the holding portion 31 to engage the guide rod 2 described later and guide the moving direction of the holding portion 31 in the vertical direction.
As shown in FIG. 3, the rod engaging portion 35 includes an engaging hole 350 provided at the center of the lower end of the holding portion 31 and a cone portion 351 that expands in a conical shape at the opening. And the internal diameter of the engagement hole 350 is adjusted to the magnitude | size which can accommodate the guide rod 2 smoothly. The lower end position of the rod engaging portion 35 is configured to be the same as or lower than the lower end position of the stator 8 when the holding portion 31 holds the stator 8.

  As shown in FIGS. 1 and 2, the stator placement space 15 is provided with nine placement spaces so that nine stators 8 to be incorporated into the motor case 9 can be placed. A placement table 155 is disposed in each placement space. As shown in FIG. 1, the cradle 155 is configured to support the end surface of the stator core 81 of the stator 8 and hold the coil end portion 82 in a floating state. As a result, when the stator 8 is held by the holding portion 31, it is possible to realize that the lower end position of the rod engaging portion 35 is located at the same position as or below the lower end position of the stator 8. Yes.

  Below the conveyor 11, pallet fixing pins 41 for positioning the pallet 95 on which the motor case 9 is placed at a predetermined position are disposed. The pallet fixing pin 41 is configured to rise when the pallet 95 arrives at a predetermined position, and engages with a pin hole 951 provided on the back surface of the pallet 95 to fix the pallet 95 at the predetermined position. ing.

  Further, below the conveyor 11, there is provided guide rod lifting / lowering means 20 for raising the guide rod 2 upward along the center position from below the motor case 9 reaching a predetermined position. Then, as shown in FIG. 7 to be described later, the guide rod 2 is raised until its upper end position is located higher than the upper end of the motor case 9 at the center position in the motor case 9 with the axial direction directed vertically. It is supposed to be. Further, as shown in FIG. 3, a tapered portion 21 is provided at the upper end of the guide rod 2 and can be easily accommodated in the engagement hole 350 of the rod engagement portion 35 of the holding portion 31 described above. Has been.

  Further, as described above, the guide rod 2 and the rod engaging portion 35 are configured to be engaged by inserting the tip end portion of the guide rod 2 into the bottomed engagement hole 350 of the rod engaging portion 35. In addition, the guide rod 2 is configured to be movable downward as the holding portion 31 is lowered while maintaining the engagement relationship with the rod engaging portion 35. This downward movement can be realized by the guide rod lifting means 20.

  Further, when the guide rod 2 and the rod engaging portion 35 are in an engagement relationship, the guide rod 2 and the rod engaging portion 35 are configured to be relatively rotatable with both engaged. Specifically, in this example, the circumferential rotation of the guide rod 2 is fixed, while the rod engaging portion 35 is rotatable along with the circumferential rotation of the holding portion 31, In the engaged state, it can slide and rotate relatively. Note that the guide rod 2 can be configured to be rotatable in the circumferential direction so as to be integrally rotatable with the rod engaging portion 35.

The motor case 9 handled in this example is provided with a seating surface 91 that supports the stator 8, and a fixing hole 92 that faces a through hole that penetrates the stator 8. As shown in FIG. 6, the fixing hole 92 can be erected by screwing a positioning pin 5 for positioning in the circumferential direction through the through hole of the stator 8.
Further, as shown in FIG. 7, the guide rod 2 is provided such that the upper end position when it is raised is positioned above the upper end position of the positioning pin 5 erected on the motor case 9.
Further, the tip 51 of the positioning pin 5 is made of resin so that the stator 8 is not damaged when it comes into contact with the stator 8.

Next, a method for performing stator assembly using the stator assembly apparatus 1 will be described. The operator who operates the holding portion 31 and the arm portion 32 of the stator moving means 3 is not shown in the figure.
First, as shown in FIG. 5, after the pallet 95 moving on the conveyor 11 reaches a predetermined stator assembly position, the pallet fixing pin 41 is lifted and engaged with the pin hole 951 on the back surface of the pallet 95. Thereby, the positions of the pallet 95 and the motor case 9 placed on the pallet 95 are fixed at predetermined positions.

  Next, as shown in FIG. 6, a pin erecting step is performed for erecting the positioning pin 5 in the fixing hole 92 (FIG. 2) provided in the seat surface 91 of the motor case 9. In this example, the positioning pins 5 are provided upright in all the three fixing holes 92.

Next, as shown in FIG. 7, the guide rod 2 is erected at the center position in the motor case 9 using the guide rod lifting means 20, and the upper end position of the guide rod 2 is set to the upper end position of the motor case 9 and A rod erecting step is performed in which the positioning pin 5 is positioned above the upper end position.
Further, as shown in FIG. 8, a stator holding step of holding the stator 8 by the holding portion 31 is performed using the stator moving means 3. At this time, the rod engaging portion 35 of the holding portion 31 is positioned at the same position as or below the lower end position of the stator 8.
The order of the rod standing step and the stator holding step is not limited and can be performed in parallel.

  Next, as shown in FIG. 9, the holding portion 31 holding the stator 8 is moved to engage the rod engaging portion 35 and the guide rod 2 so that the axes of the stator 8 and the motor case 9 are aligned. Axis center adjustment process is performed. At this time, in this example, in the initial stage of inserting the upper end portion of the guide rod 2 into the engagement hole 350 of the rod engagement portion 35 with the guide rod 2 raised, the lower end portion of the stator 8, that is, the coil end portion 82. The lower end portion is at the position indicated by the symbol A and is adjusted so as to be positioned above the upper end position of the positioning pin 5 in the vertical direction. Therefore, contact between the positioning pin 5 and the coil end portion 82 can be easily avoided.

Next, as shown in the figure, after the axial center adjustment step, a circumferential direction adjustment step is performed in which the circumferential position of the holding portion 31 is adjusted and the through hole and the positioning pin 5 are aligned.
Thereafter, as shown in FIGS. 10 and 11, the holding portion 31 is lowered and the stator 8 is placed on the seat surface 91 of the motor case 9 while the rod engaging portion 35 and the guide rod 2 are engaged. A placement process is performed. At this time, the guide rod 2 moves downward as the holding portion 31 descends while maintaining the engagement relationship with the rod engaging portion 35.

By this placement step, the placement of the stator 8 in the motor case 9 is completed. Thereafter, as shown in FIG. 12, the contact piece 313 of the holding portion 31 is reduced to reduce the contact between the stator 8 and the holding portion 31. The engagement relationship is released, and the holding portion 31 is moved away from the motor case 9.
Further, after that, the positioning pin 5 is removed and the fixing bolt is fastened, whereby the assembly of the stator 8 to the motor case 9 is completed.

  As described above, according to the stator assembling method using the stator assembling apparatus 1 of the present example, the shaft center adjusting step is performed after the rod standing step. In the rod erecting step, the guide rod 2 is protruded so as to be positioned above the upper end position at the center position in the motor case. Further, in this example, the lower end position of the rod engaging portion 35 provided in the holding portion 31 that holds the stator 8 is the same as or lower than the lower end position of the stator 8, that is, the lower end portion of the coil end portion 82. It is set to be located. Therefore, when carrying out the above-described axial center adjustment step, the upper end portion of the guide rod 2 and the lower end portion of the rod engaging portion 35 are engaged, but in the positional relationship in the vertical direction at that time, the coil end portion It can be easily avoided that 82 contacts other surrounding sites.

Furthermore, in this example, the pin erection step and the circumferential direction adjustment step are performed. However, since the circumferential direction adjustment step is performed after the axial center adjustment step, the circumferential direction is maintained while maintaining the aligned state of the axial centers. The movement in the direction is possible, and the alignment in the circumferential direction is much easier than before.
Further, in the subsequent placing step, since the holding portion 31 is lowered while the rod engaging portion 35 and the guide rod 2 are engaged, the state in which the axes of the stator 2 and the motor case 9 are aligned is maintained. Therefore, it is possible to reliably avoid the coil end portion 82 of the stator 2 from contacting the inner peripheral surface of the motor case 9.

  Thus, according to the present example, the assembly can be performed while easily avoiding the coil end portion 82 of the stator 2 coming into contact with other parts, and the stator assembly operation is facilitated and the reliability is improved. Can be achieved.

Explanatory drawing which looked at the stator assembly | attachment apparatus in Example 1 from the front. Explanatory drawing which looked at the stator assembly | attachment apparatus in Example 1 from upper direction. Explanatory drawing which shows the structure of the holding | maintenance part and rod engaging part in a stator moving means in Example 1. FIG. Explanatory drawing which shows the structure of the holding | maintenance part in a stator moving means in Example 1 (BB sectional view taken on the line in FIG. 3). Explanatory drawing which shows the state in which the pallet on the conveyor in Example 1 was fixed in the predetermined position. Explanatory drawing which shows the state which performed the pin standing-up process in Example 1. FIG. Explanatory drawing which shows the state which performed the stick standing-up process in Example 1. FIG. Explanatory drawing which shows the state which performed the stator holding | maintenance process in Example 1. FIG. Explanatory drawing which shows the state which performed the axial center adjustment process and the circumferential direction adjustment process in Example 1. FIG. Explanatory drawing which shows the middle of the mounting process in Example 1. FIG. Explanatory drawing which shows the state in which the mounting process in Example 1 was completed. FIG. 3 is an explanatory diagram illustrating a state where the holding unit is retracted from the stator after the mounting process is completed in the first embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stator assembly apparatus 2 Guide rod 3 Stator moving means 31 Holding part 35 Rod engaging part 5 Positioning pin

Claims (9)

A stator assembling device for assembling a stator formed by attaching a coil to a ring-shaped stator core in a substantially cylindrical motor case,
A guide rod that is erected at the center position in the motor case with the axial direction directed in the vertical direction, and whose upper end position is located above the upper end of the motor case;
A holding portion that holds the stator from the inner peripheral surface side, and an arm portion that supports the holding portion so as to be movable in the vertical and horizontal directions and the circumferential direction and assists the force when moving the stator held by the holding portion. And a stator moving means provided with
A rod engaging portion that engages with the guide rod and guides the moving direction of the vertical movement of the holding portion is provided at the lower end portion of the center position of the holding portion in the stator moving means. Stator assembly device.   2. The lower end position of the rod engaging portion according to claim 1, wherein the lower end position of the rod engaging portion is configured to be the same as or lower than the lower end position of the stator when the holding portion holds the stator. Stator assembly device.   3. The motor case according to claim 1, wherein the motor case is provided with a seating surface that supports the stator, and a fixing hole that faces a through hole that passes through the stator is formed in the fixing hole. A positioning pin for positioning in the circumferential direction through the through hole of the stator can be erected, and the guide bar has an upper end position that is erected on the motor case. A stator assembling apparatus, characterized in that the stator assembling apparatus is provided so as to be positioned above the position.   4. The guide rod and the rod engaging portion according to claim 1, wherein the guide rod and the rod engaging portion are engaged by inserting the other end portion into a bottomed engaging hole provided at one end portion. The stator assembly is characterized in that the guide rod is configured to be movable downward as the holding portion is lowered while maintaining the engagement relationship with the rod engaging portion. apparatus.   5. The stator assembly device according to claim 1, wherein the stator assembling apparatus includes a conveyor that conveys the motor case, and the lower part of the conveyor is below the motor case that has reached a predetermined position. A stator assembling apparatus comprising a guide bar elevating means for raising the guide bar upward along a center position. A stator assembling method in which a stator formed by attaching a coil to a ring-shaped stator core is assembled in a substantially cylindrical motor case,
A rod erecting step of erecting a guide rod at the center position in the motor case with the axial direction facing up and down, and positioning the upper end position of the guide rod above the upper end position of the motor case;
A holding portion that holds the stator from the inner peripheral surface side, and an arm portion that supports the holding portion so as to be movable in the vertical and horizontal directions and the circumferential direction and assists the force when moving the stator held by the holding portion. Using a stator moving means provided with a bar engaging portion that engages with the guide rod and guides the moving direction of the vertical movement of the holding portion at the center position of the holding portion. A stator holding step of holding by the part,
An axis adjustment step of moving the holding portion holding the stator to engage the rod engaging portion and the guide rod so that the axes of the stator and the motor case coincide with each other;
And a mounting step of placing the stator on the seat surface of the motor case by lowering the holding portion while engaging the rod engaging portion and the guide rod. Assembly method.   7. The stator assembly according to claim 6, wherein in the stator holding step, the stator is held by the holding portion so that the rod engaging portion is positioned at the same position as or below the lower end position of the stator. Method. In claim 6 or 7, at least prior to the axis adjustment step, a fixing hole provided on a seating surface supporting the stator of the motor case and facing a through hole penetrating the stator, A pin erecting step of erecting a positioning pin for positioning in the circumferential direction through the through hole of the stator;
In the bar erecting step, the upper end position of the guide bar is positioned above the upper end position of the positioning pin,
After the axial center adjusting step, the stator assembling method is characterized by having a circumferential direction adjusting step of adjusting the circumferential position of the holding portion to align the axial center of the through hole and the positioning pin.   9. The guide rod and the rod engaging portion according to claim 6, wherein the guide rod and the rod engaging portion are engaged with each other by inserting the other end portion into a bottomed engaging hole provided at one end portion. The stator assembly is characterized in that the guide rod is configured to be movable downward as the holding portion is lowered while maintaining the engagement relationship with the rod engaging portion. Method.

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