JP2017121131A - Winding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique capable of increasing the movement of the needle of a winding machine.SOLUTION: A needle 120 is provided on the main shaft 110 of a winding device 100, movably in the cross direction z crossing the stator core central axis P of the stator core 20. A lever 240 is rotatable with an axis of rotation, different from the stator core central axis P and parallel with the stator core central axis P, as a fulcrum. When a cam 220 having a spiral cam groove 221 formed therein rotates relatively to the main shaft 110, rotational motion of the cam is transmitted to a power point (distance R1 from the fulcrum) provided in the short piece of the lever 240, and the lever 240 rotates. When the lever 240 rotates, a torque generated at a point of application (distance from the fulcrum R2>R1) provided in the long side of the lever 240 is transmitted to the needle 120, and the needle 120 moves in the needle guide groove 113a in the cross direction z.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a winding device that winds a conducting wire around teeth of a stator core, and more particularly to a technique for expanding the amount of movement of a needle that supplies the conducting wire.

When winding a conducting wire around the teeth of the stator core constituting the stator, a winding device is used. Conventionally, for example, a winding device disclosed in Patent Document 1 is known.
The stator core has an inner space (rotor insertion space) formed by an inner peripheral surface of the stator core (generally, a tooth tip surface on the radially inner side of the teeth). The winding device disclosed in Patent Document 1 is arranged coaxially with the stator core central axis in the inner space of the stator core, moves along the stator core central axis, and is centered on the stator core central axis. And a needle that is disposed on the upper side of the main shaft and that supplies a conducting wire. The lead wire supplied from the needle is wound around the tooth by turning the main shaft on which the needle is disposed around the stator tooth.
A cam that rotates relative to the main shaft is also provided. A spiral cam groove is formed in the cam. And the pin by which the one end side was connected with the needle and the other end side was fitted so that the movement to the cam groove was possible. A needle driving device is configured to move the needle along the crossing direction (radial direction) intersecting the stator core central axis by the cam and the pin in which the spiral cam groove is formed. By moving the needle along the radial direction, the conducting wire supplied from the needle can be wound around the teeth in the radial direction.

JP-A-6-178510

In the conventional winding device disclosed in Patent Document 1, the needle driving device is rotated relative to the main shaft, and a cam in which a spiral cam groove is formed, and one end side is connected to the needle. The other end side is constituted by a pin that is movably fitted in the cam groove of the cam.
In such a needle drive device, the amount of movement of the needle along the intersecting direction (radial direction) intersecting the stator core rotation axis is limited by the space for forming the cam groove on the cam surface. For example, when three needles are provided, a helical cam groove is formed within a range of about 120 degrees on the cam surface.
Here, the inner diameter of the cam is set to a value that allows the main shaft to be inserted into the inner space of the cam (for example, 22 mm). For this reason, the space that forms the cam groove on the cam surface is limited by the outer diameter of the cam, that is, the inner diameter of the stator core that forms the inner space (rotor insertion space) of the stator core in which the winding device is disposed. Is done.
Therefore, for a stator core with a small inner diameter of the stator core and a deep slot, the conductor cannot be aligned and wound behind the slot where the needle cannot reach, and the space factor of the conductor is reduced. To do.
The present invention has been made in view of such a point, and an object of the present invention is to provide a winding device that can increase the amount of movement of a needle.

A stator core to which a conductive wire is wound using the winding device of the present invention typically includes a yoke extending along the circumferential direction and a radial direction from the yoke to the center axis of the stator core. An inner peripheral surface formed by a plurality of teeth extending in the circumferential direction, a plurality of slots formed by teeth adjacent in the circumferential direction, and a tooth tip surface on the center side of the stator core of the teeth. A space (rotor insertion space) is provided. The conducting wire is wound around the tooth through the slot. The winding device of the present invention can also be used when a resin bobbin having insulating properties is arranged on both sides in the axial direction of the stator core and the conductor is wound around the tooth via the bobbin.
The winding device of the present invention includes a needle that supplies a conductive wire and a support member that supports the needle. The support member moves along the stator core central axis and rotates around the stator core central axis. Preferably, a first drive unit that moves the support member along the stator core central axis and a second drive unit that rotates the support member about the stator core central axis are provided. Various known drive means can be used as the first drive means and the second drive means. Further, the support member supports the needle so as to be movable along a crossing direction intersecting the stator core central axis. As the intersecting direction intersecting with the stator core central axis, a direction (radial direction) orthogonal to the stator core central axis (including “substantially orthogonal”) is typically set. For example, a needle guide groove extending along the cross direction is formed in the support member, and the needle is moved in the needle guide groove along the needle guide groove. Any possible arrangement can be used. An appropriate number of needles can be selected. Preferably three or six are selected.
Moreover, the needle drive device which moves a needle along the crossing direction is provided. The needle driving device includes a first member that rotates relative to the support member, and a motion conversion device that converts the rotational motion of the first member into a moving motion of the needle along the crossing direction. . The phrase “rotate relative to the support member” means that the support member rotates relative to the support member regardless of movement of the support member along the stator core central axis or rotation around the stator core central axis. Means composition. Preferably, third driving means for rotating the first member relative to the support member is provided. As the third driving means, various known driving means can be used.
The motion conversion device includes a first motion conversion device that converts a relative rotational motion of the first member relative to the support member into a rotational motion centered on a rotational axis different from the stator core central axis, A second motion conversion device that converts the rotational motion converted by the first motion conversion device into a movement motion of the needle along the crossing direction;
Typically, in the winding device, in a state where the needle is located at the end position on the stator core central axis side along the crossing direction, the support member and the needle driving device are placed in the inner space of the stator core. Configured to be insertable.
In the present invention, after the relative rotational motion of the first member relative to the support member is converted into rotational motion around a central axis different from the stator core central axis, the needle intersects with the stator core central axis. Therefore, the amount of movement of the needle along the crossing direction can be increased as compared with the conventional winding device. As a result, the needle can be inserted to the depth of the slot that could not be reached by the conventional winding device, and the conductors can be aligned and arranged to the depth of the slot. Therefore, the space factor of the conducting wire in the slot can be increased.
In a different form of the present invention, the first motion conversion device has a rotation axis different from the center axis of the stator core as a fulcrum, has a power point at the position of the first distance R1 from the fulcrum, and the second distance R2 from the fulcrum. It has the 2nd member which has an action point in the position of (> R1). And it is comprised so that the relative rotational motion with respect to the supporting member of the 1st member may be transmitted to the power point of the 2nd member.
The second motion conversion device is configured to convert the rotational motion of the action point of the second member into the movement motion of the needle along the crossing direction.
As the second member, it is preferable to use a lever that is configured by a short piece having a power point and a long piece having an action point and that rotates around a fulcrum. In addition, the shape of the lever is an L shape in which the short piece and the long side are arranged in an L shape, a V shape in which the short piece and the long piece are arranged in a V shape, an overlapping shape in which the short piece and the long side are overlapped, etc. It is appropriately selected according to the number of needles, the shape and area of the space in which the lever is arranged.
In this embodiment, the relative rotational motion of the first member relative to the support member can be easily converted into a rotational motion around a rotational axis different from the stator core central axis with a simple configuration. Further, by selecting the ratio of the distance R1 from the fulcrum to the force point and the distance R2 from the fulcrum to the action point, the amount of movement of the needle along the intersecting direction can be easily set.
In another different form of the present invention, the first member is constituted by a plate-like member having a spiral groove. In addition, the first motion conversion device includes a first connecting member provided between the first member and the second member. The first connecting member is provided such that one end side is connected to the power point of the second member and the other end side is movable along the spiral groove of the first member.
In this embodiment, the rotational movement of the first member can be transmitted to the second member with a simple configuration.
In another different form of the present invention, the second member is configured to rotate about a rotation axis parallel to the stator core central axis, unlike the stator core central axis.
In this embodiment, the connection between the first member and the second member and the connection between the second member and the needle can be easily performed.
In another different embodiment of the present invention, the second member is disposed on a plate-like member having a maximum outer diameter smaller than the inner diameter of the stator core.
In this embodiment, the support member of the winding device and the needle drive device can be arranged in the inner space of the stator core.
In another different form of the invention, the needle has a groove extending along a direction intersecting the intersecting direction. The second motion conversion device includes a third member that is inserted into the groove of the needle so as to be movable along the groove, and a second member that is provided between the second member and the third member. The connecting member is provided. The second connecting member has one end connected to the operating point of the second member and the other end connected to the third member.
Preferably, the groove of the needle is formed to extend in a direction perpendicular to the intersecting direction (including “substantially right angle”). Preferably, the arrangement positions of the second member and the needle are set so that the arc trajectory of the action point when the second member rotates is along the extending direction of the groove of the needle.
The shape of the groove formed in the needle and the shape of the third member inserted into the groove can be set as appropriate, but preferably the shape can prevent the third member from coming out of the groove. For example, the groove of the needle is formed such that the cross-sectional shape along the intersecting direction is a trapezoid in which the width of the opening through which the second connecting member is created is narrower than the width of the bottom wall. The cross-sectional shape of the third member is also formed in a similar trapezoidal shape.
In this embodiment, the third member generates a force for moving the needle in the direction intersecting the intersecting direction, which is generated when the rotational motion of the action point of the second member is converted into the moving motion of the needle along the intersecting direction. Can be absorbed. Thereby, the needle can be moved linearly along the intersecting direction, and the position of the needle along the intersecting direction can be set accurately.

  In the present invention, the amount of movement of the needle can be increased, and the conductive wire can be aligned and wound to the back of the slot.

It is a figure explaining schematic operation | movement of the winding apparatus of this invention. It is sectional drawing seen from the direction along the axial direction of one Embodiment of the winding apparatus of this invention. 3 is a cross-sectional view taken along line III-III in FIG. It is a figure explaining the operation | movement at the time of moving a needle. It is an assembly drawing of one Embodiment of the winding apparatus of this invention. It is a figure which shows the structure of a needle guide. It is a figure which shows the structure of a needle and a needle guide plate. It is a figure which shows the structure of a lever. It is a figure which shows the structure of a lever guide. It is a figure which shows the structure of a cam. It is the graph which showed the relationship between the internal diameter of a stator core, and the depth depth in the slot which a needle can reach about the winding device of the present invention and the conventional winding device.

Embodiments of the present invention will be described below with reference to the drawings.
In the present specification, the description “axial direction” indicates a direction along the stator core central axis P passing through the stator core center point, and the description “circumferential direction” indicates the stator core central axis P. The direction along the center circle is shown, and the description “radial direction” indicates a direction perpendicular to the stator core central axis P.

First, the schematic operation of the winding device of the present invention will be described with reference to FIG. FIG. 1 shows an example of a stator 10 of a rotating machine. FIG. 1 is a cross-sectional view seen from a direction perpendicular to the axial direction.
The stator 10 shown in FIG. 1 includes a stator core 20, a slot insulating member 30, and a conductive wire 50.
The stator core 10 is constituted by a laminated body in which a plurality of electromagnetic steel plates are laminated. The stator 10 has a yoke 21 extending along the circumferential direction, and a tooth 22 extending from the yoke 21 in the stator core central axis P direction along the radial direction. The teeth 22 have a teeth base 23 extending along the radial direction, and a teeth tip 24 provided on the stator core central axis P side of the teeth base 23 and extending along the circumferential direction. On the stator core central axis P side of the tooth tip 24, an arc-shaped tooth tip surface 24a is formed. Teeth front end surface 24a corresponds to the inner peripheral surface of the stator core. An inner space 20a of the stator core 20 is formed by the tooth tip surface 24a (inner circumferential surface of the stator core). The inner space 20a forms a rotor insertion space into which a rotor (not shown) is inserted.
A slot 25 is formed by teeth 22 adjacent in the circumferential direction. A slot opening 25a is formed between the teeth 22 (tooth tips 24) adjacent in the circumferential direction.

The winding device 100 described later is disposed coaxially with the stator core central axis P in the inner space (rotor insertion space) 20a of the stator core 20. Then, the needle 120 for supplying the conducting wire 50 is moved along the stator core central axis P (along the arrow x direction shown in FIG. 2) while being inserted into the slot 25 from the slot opening 25a. At the same time, the needle 120 is rotated around the tooth 22 by rotating around the stator core central axis P (along the direction of the arrow y shown in FIGS. 1 and 3), and the lead wire 50 is connected to the tooth 22. Wrap. Further, the lead wire 50 is aligned and wound along the radial direction by moving the needle 120 along the radial direction (along the arrow z direction shown in FIGS. 1 and 3).
In the embodiment described below, the conductive wire 50 is wound around the tooth 22 in a state where the bobbins 40 (see FIG. 2) are arranged on both axial sides of the stator core 20. The bobbin 40 is made of, for example, a resin having insulating characteristics. The bobbin 40 includes an outer wall 41 extending along the circumferential direction, an inner wall 44 disposed on the inner side of the outer wall 41 and extending along the circumferential direction, and a connecting portion 43 connecting the outer wall 41 and the inner wall 44. ing. The outer wall 41, the connecting portion 43, and the inner wall 44 of the bobbin 40 are disposed at positions facing the yoke 21, the tooth base 23, and the tooth tip 24 of the stator core 20, respectively.

Next, an embodiment of the winding device of the present invention will be described with reference to FIGS.
2 is a cross-sectional view of the winding device 100 of the present embodiment as seen from the direction along the axial direction, and FIG. 3 is a cross-sectional view taken along the line III-III of FIG. FIG. 4 is a diagram illustrating an operation when moving the needle 120. FIG. 5 is an assembly diagram of the winding device 100 of the present embodiment. 6 is a diagram illustrating the configuration of the needle guide 113, FIG. 7 is a diagram illustrating the configuration of the needle 120 and the needle guide plate 250, and FIG. 8 is a diagram illustrating the configuration of the lever 240. FIG. 10 is a diagram showing a configuration of the lever guide 230, and FIG. 10 is a diagram showing a configuration of the cam 220.

The winding device 100 of the present embodiment has a main shaft 110 whose central axis is arranged coaxially with the stator core central axis P. Inside the main shaft 110, a hole 110a into which the conducting wire 50 is inserted from below is formed.
A socket 111 is disposed on the main shaft 110. The socket 111 is fixed to the main shaft 110 with bolts or the like. The main shaft 110 and the socket 111 can also be formed integrally.
The main shaft 110 moves in the arrow x direction (direction along the stator core central axis P) in which the central axis extends. Although not shown in the figure, a first driving means for moving the main shaft 110 in the arrow x direction is provided. As the first driving means, various known driving means can be used, and thus description thereof is omitted.
Further, the main shaft 110 rotates in the direction of the arrow y shown in FIG. 1 around the central axis (stator core central axis P). Although not shown in the figure, second driving means for rotating the main shaft 110 in the arrow y direction is provided. As the second driving means, various known driving means can be used, and thus description thereof is omitted.

A needle guide 113 is disposed on the top of the socket 111. The needle guide 113 is fixed to the socket 111 with a bolt 114. A needle guide groove 113 a is formed in the needle guide 113.
In the needle guide groove 113a, the needle 120 for supplying the conducting wire 50 is inserted so as to be movable along the needle guide groove 113a.
In the present embodiment, three needles 120 are provided. Therefore, the needle guide 113 is formed with three needle guide grooves 113a radially as shown in FIG. The needle guide groove 113a is formed so that the needle 120 can move along the radial direction (direction perpendicular to the stator core central axis P) in the needle guide groove 113a. On the lower surface of the needle guide 113, a slit is formed in which a roller pin 280 (described in detail later) for moving the needle 120 along the radial direction can move along the radial direction. 6A is a plan view of the needle guide 113 viewed from above (a direction perpendicular to the axial direction), and FIG. 6B is a side view of the needle guide 113 viewed from the direction of arrow VI in FIG. 6A. FIG.
The needle 120 communicates with a rear end surface (end surface on the side of the needle guide groove 113a) and a front end surface (end surface opposite to the needle guide groove 113a) for supplying the conducting wire 50 inserted into the hole 110a of the main shaft 110. A conducting wire guide hole 120a is formed.
A bush (also referred to as a “guide bush”) 115 is disposed at the upper end of the hole 110 a of the main shaft 110. The bush 115 is formed with a curved inner surface in order to guide the conductive wire 50.
The “support member” of the present invention is constituted by the main shaft 110, the socket 111, the needle guide 113, and the like.

  A differential shaft 210 is disposed on the outer periphery of the main shaft 110. The differential shaft 210 rotates relative to the main shaft 110. Although not shown, third driving means for rotating the differential shaft 210 relative to the main shaft 110 is provided. As the third driving means, various known driving means can be used, and thus description thereof is omitted.

A cam 220 is disposed above the differential shaft 210. The cam 220 is rotatable relative to the socket 111 and is fixed to the differential shaft 210 by a bolt 211. The cam 220 is formed as a plate member.
As shown in FIG. 10, the cam 220 is formed with a spiral cam groove 221 that is open on the upper surface side. In this embodiment, since three needles 120 are provided, three cam grooves 221 are also formed. Hereinafter, unless otherwise specified, the number of components for driving the needle 120 is provided corresponding to the number of needles 120. 10A is a plan view of the cam 220 as viewed from above (a direction perpendicular to the axial direction), and FIG. 10B is a cross section taken along line XX in FIG. 10A. FIG.
The cam 220 corresponds to the “first member” of the present invention.

A lever guide 230 is disposed on the cam 220. The lever guide 230 is fixed to the socket 111. The lever guide 230 is formed as a plate-like member.
As shown in FIG. 9, the lever guide 230 has a recess 231 having a space in which the lever 240 can rotate on the upper surface side. In the region corresponding to the recess 231 of the lever guide 230, a hole 232 and a guide groove 233 that communicate with the upper surface and the lower surface are formed. In addition, the hole 232 should just open the upper surface. The guide groove 233 is formed so as to extend along an arc centered on the center point of the hole 232 when viewed in a cross section perpendicular to the axial direction. 9A is a plan view of the lever guide 230 as viewed from above (a direction perpendicular to the axial direction), and FIG. 9B is a side view as viewed from the direction of the arrow IX in FIG. 9A. FIG.

In the present embodiment, the lever 240 disposed in the recess 231 of the lever guide 230 has an L shape in which the short piece 241 and the long side 242 are disposed in an L shape as shown in FIG. . Further, the lever 240 is formed with holes 243 to 245 communicating with the upper surface and the lower surface. FIG. 8 is a plan view of the lever 240 as viewed from above (a direction perpendicular to the axial direction). Note that the bottom surface of the hole 244 only needs to be open, and the top surface of the hole 245 only needs to be open.
The hole 243 (fulcrum hole) is formed at a location corresponding to the fulcrum that is the rotation center of the lever 240. The hole 244 (power point hole) is formed in a portion of the short piece 241 corresponding to the power point of the lever 240. The hole 245 (action point hole) is formed at a location corresponding to the action point on the long side 242. The distance R2 between the fulcrum and the action point is set longer than the distance R1 between the fulcrum and the force point (R2> R1).
As will be described in detail later, the lever 240 is rotatably supported by a knock pin 248 inserted into a hole 243 formed at a location corresponding to the fulcrum. Further, the rotational force of the cam 220 is transmitted through the roller pin 260 inserted into the hole 244 to rotate the lever 240, and the rotational force of the lever 240 is transmitted to the needle 120 through the roller pin 280 inserted into the hole 245. Is done.
The guide groove 233 of the lever guide 230 is provided to facilitate the operation of converting the movement of the cam 220 along the cam groove 221 into the rotation of the lever 240.
The hole 243 (fulcrum hole), the hole 244 (force point hole), and the hole 245 (action point hole) can also be expressed as “first hole”, “second hole”, and “third hole”, respectively.
The lever 240 corresponds to the “second member” of the present invention.

A needle guide plate 250 is disposed above the lever guide 230 (lever 240). The needle guide plate 250 is fixed to the socket 111. As shown in FIG. 7, the needle guide plate 250 has a hole 251 and a guide groove 252 that communicate with the upper surface and the lower surface. In addition, the hole 251 should just open on the lower surface side. The guide groove 252 is formed so as to extend along an arc centered on the center point of the hole 251 when viewed in a cross section perpendicular to the axial direction. FIG. 7 shows a plan view of the lever guide 250 as viewed from above (a direction perpendicular to the axial direction).
The guide groove 252 of the needle guide plate 250 is provided to facilitate the operation of converting the rotation of the lever 240 into the movement of the needle 120 along the needle guide groove 113a.

As shown in FIG. 7, the needle 120 is open on the lower surface side (needle guide plate 250 side) and intersects the radial direction (arrow z direction) (arrow w direction) (preferably orthogonal) The frame guide groove 121 is formed to extend along the direction of the movement.
A frame 290 is inserted into the frame guide groove 121 so as to be movable in the arrow w direction along the frame guide groove 121.
In this embodiment, the cross-sectional shape along the radial direction (arrow z direction) of the top guide groove 121 is formed in a trapezoidal shape in which the width of the opening is smaller than the width of the bottom surface. The cross-sectional shape of the top 290 along the moving direction (arrow w direction) and the crossing direction (arrow z direction) is also formed in a trapezoidal shape like the cross-sectional shape of the top guide groove 121. Thereby, the top 290 inserted into the top guide groove 121 can be prevented from coming out of the opening formed in the lower surface of the top guide groove 121. A hole 291 into which a later-described roller pin 280 is inserted is formed on the lower surface of the top 290. FIG. 7 is a perspective view of the needle 120 and the top 290.

Next, the coupling relationship of each component will be described.
Here, in the differential shaft 210, the cam 220, the lever guide 230, and the needle guide plate 250, the main shaft 110 is inserted into the inner space. As described above, the lever guide 230, the needle guide plate 250, and the needle guide 113 are integrated with the main shaft 110, and the cam 220 is integrated with the differential shaft 210. Further, the cam 220 and the differential shaft 210 move along the arrow x direction (along the stator core central axis P) together with the main shaft 110, and in the arrow y direction (circumferential direction around the stator core central axis P). While rotating along, it rotates relative to the main shaft 110.

A knock pin 248 is inserted into a hole (fulcrum hole) 243 of the lever 240 in a state where the lever 240 is disposed in the recess 231 of the lever guide 230. One end of the knock pin 248 is driven into the hole 232 of the lever guide 230, and the other end of the knock pin 248 is driven into the hole 251 of the needle guide plate 250.
As a result, the lever 240 is inserted into the hole (fulcrum hole) 243 on the lever guide 230, and the knock pin 248 disposed between the lever guide 230 fixed to the main shaft 110 and the needle guide plate 230 is used as the rotation axis. It can be rotated. That is, the lever 240 is rotatable around the fulcrum.

One end of the roller pin 260 is driven into the hole (power point hole) 244 of the lever 240. The other end of the roller pin 260 is passed through a guide groove 233 formed in the lever guide 230, and then a cam roller 270 is attached. The cam roller 270 is inserted into a cam groove 221 formed in the cam 220 so as to be movable along the cam groove 221.
When the differential shaft 210 and the cam 220 rotate relative to the main shaft 110 (rotate around the stator core central axis P), the cam roller 270 moves along the cam groove 221. When the cam roller 270 moves along the cam groove 221, the roller pin 260 connected to the cam roller 270 moves while being guided by the guide groove 233 formed in the lever guide 230. Thereby, the rotation of the cam 220 is transmitted to the force point (hole 244) of the lever 240 via the roller pin 260, and the lever 240 rotates around the fulcrum (knock pin 248).

One end of the roller pin 280 is driven into the hole (working point hole) 245 of the lever 240. The other end of the roller pin 280 is inserted into the hole 291 of the top 290 after passing through the guide groove 252 formed in the needle guide plate 250.
When the lever 240 is rotated about the fulcrum (knock pin 248) by the rotation of the cam 220, the operating point (hole 245) of the lever 240 is also rotated about the fulcrum (knock pin 248). When the operating point (hole 245) of the lever 240 rotates, the roller pin 280 connected to the operating point (hole 245) of the lever 240 moves while being guided by the guide groove 252 formed in the needle guide plate 250. When the roller pin 280 moves while being guided by the guide groove 252, a force along the guide groove 252 acts on the top 291. Thereby, the needle 120 moves along the radial direction (arrow z direction) by the force acting on the top 291.

Here, the operating point (hole 245) of the lever 240, that is, the roller pin 280 connected to the operating point of the lever 240 rotates in an arc shape around the fulcrum (knock pin 248) of the lever 240, and the needle 120 is inserted. The formed needle guide groove 113a is linearly formed along the radial direction. For this reason, when the top 290 is not provided (when the other end of the roller pin 280 is directly connected to the needle 120), the extending direction of the arc locus (the arc shape of the guide groove 252) of the roller pin 280 is defined as the needle guide groove. Even in combination with the extending direction of 113a, a force that moves in the direction (arrow w direction) intersecting the radial direction acts on the needle 120.
In the present embodiment, the top 290 coupled to the roller pin 280 forms a top guide groove 121 extending in the needle 120 in a direction intersecting the radial direction (arrow w direction). The top 290 is inserted into the top guide groove 121 so as to be movable along the top guide groove 121, and the other end of the roller pin 280 is connected to the top 290.
As a result, the force acting on the top 290 and moving in the direction (arrow w direction) intersecting the radial direction (arrow z direction) is absorbed by the top 290 moving along the top guide groove 121.
Therefore, the rotational movement of the operating point of the lever 240 can be reliably converted into a linear movement along the radial direction of the needle 120, and the position can be accurately adjusted along the radial direction of the needle 120.

An outline of the operation when the needle 120 is moved along the radial direction is shown in FIG.
In FIG. 4, the force point (hole 244) provided in the short piece 241 of the lever 240 and the action point (hole 245) provided in the long side 242 are the arc locus M and the distance R1 from the fulcrum (hole 243). It rotates along the arc locus N of R2 (> R1). The lever 240 is moved from the position indicated by the chain line (the position where the needle 120 is located along the radial direction toward the slot opening 25a) to the position indicated by the solid line via the intermediate position indicated by the one-dot chain line (the needle 120 is slotted along the radial direction). 25 position on the back side).

When the needle 120 is moved to the back of the slot 25, the distance from the slot opening to the maximum reach position of the needle, that is, the depth L in the slot (see FIGS. 1 and 2) and the inner diameter of the stator core The relationship of D (see FIG. 1) is shown in the graph of FIG.
In FIG. 11, the horizontal axis indicates the inner diameter L (mm) of the stator core, and the vertical axis indicates the depth depth L (mm) in the slot.
A solid line (1) is a graph when the winding device of the present invention is used, and a chain line (2) is a graph when the conventional winding device is used. The cam inner diameter is set to the same value.
From FIG. 11, it can be understood that the amount of movement of the needle can be increased by using the winding device of the present invention, as compared with the case of using the conventional winding device.

  As described above, in the present embodiment, the rotational motion of the cam 111 that supports the needle and rotates relative to the main shaft 210 that is disposed coaxially with the stator core central axis P differs from the stator core central axis P. The rotational axis of the lever 240 is converted into the rotational motion of the lever 240 having a central axis parallel to the central axis P as a fulcrum, and having a force point of distance R1 from the fulcrum and an action point of distance R2 (> R1) from the fulcrum It has been converted into a moving motion along the direction. Thereby, the moving amount | distance of a needle can be expanded and it can align to the back of a slot and can wind a conducting wire around a teeth. Therefore, the space factor of the conducting wire in the slot can be increased.

The present invention is not limited to the configuration described in the embodiment, and various changes, additions, and deletions are possible.
The number of needles that supply the conducting wire is not limited to three. For example, six can be provided. In this case, the number of components, grooves and the like related to the needle is also changed corresponding to the number of needles.
As the first member that rotates relative to the support member (main shaft), a component other than the cam that rotates relative to the support member can be used.
The first motion conversion device that converts the rotational motion of the first member (cam) into a rotational motion centered on a rotational axis different from the central axis (stator core central axis) of the support member (main shaft) is a spiral shape. However, the present invention is not limited to a motion conversion device composed of a plate-like cam in which a cam groove is formed and a lever whose fulcrum is a rotation axis parallel to the central axis (stator core central axis) of the support member (main shaft). The motion conversion device having the configuration can be used.
The shape of the lever used as the second member constituting the first motion conversion device is not limited to the L shape in which the short piece and the long side are arranged in an L shape, and the shape and size of the space in which the lever is arranged, etc. It is appropriately selected depending on. For example, it is possible to select a V shape in which the short piece and the long side are arranged in a V shape, or an overlapping shape in which the short piece and the long side are arranged in an overlapping manner.
As a 2nd member which comprises a 1st motion converter, it is not limited to a lever, A various component can be used.
The second motion conversion device that converts a rotational motion around a rotational axis different from the central axis (stator core central axis) of the support member (main shaft) into a moving motion along the radial direction of the needle is formed on the needle. The motion conversion device is not limited to the motion conversion device configured by the piece guide groove extending in the direction intersecting the radial direction and the piece inserted movably in the piece guide groove. Can be used. Further, the frame guide groove and the frame can be omitted.
The winding device of the present invention can be used when winding around a tooth by various winding methods.

10 Stator 20 Stator core 20a Inner space (rotator insertion space)
21 Yoke 22 Teeth 23 Teeth base 24 Teeth tip 24a Teeth tip (stator inner circumferential surface)
25 Slot 25a Slot opening 30 Slot insulating member 40 Bobbin 41 Outer wall 43 Connection portion 44 Inner wall 50 Conductor 100 Winding device 110 Spindle 110a Hole 111 Socket 113 Needle guide 113a Needle guide groove 114, 211 Bolt 115 Bush 120 Needle 120a Conductor guide hole 121 frame guide groove 210 differential shaft 220 cam 221 cam groove 230 lever guide 231 opening 232 hole 233 guide groove 240 lever 241 short piece 242 long piece 243, 244, 245 hole 248 knock pin 250 needle guide plate 251 hole 252 guide groove 260, 280 Roller pin 270 Cam roller 290 Top 291 Hole

Claims (6)

A winding device for winding a conductor around teeth of a stator core,
A needle for supplying a conductive wire;
Support that moves along the stator core central axis of the stator core, rotates about the stator core central axis, and supports the needle so as to be movable along an intersecting direction intersecting the stator core central axis A member,
A needle driving device for moving the needle along the intersecting direction;
The needle driving device includes: a first member that rotates relative to the support member; and a motion conversion device that converts a rotational motion of the first member into a moving motion along the intersecting direction of the needle. Have
The motion conversion device includes a first motion conversion device that converts a relative rotational motion of the first member relative to the support member into a rotational motion around a rotational axis different from the stator core central axis. A winding device comprising: a second motion converting device that converts the rotational motion converted by the first motion converting device into a moving motion along the crossing direction of the needle. The winding device according to claim 1,
The first motion converter has a rotation point different from the stator core central axis as a fulcrum, has a force point at a first distance R1 from the fulcrum, and has a second distance R2 (> R1) from the fulcrum. A second member having a point of action at a position, wherein the first member is configured such that a relative rotational movement of the first member relative to the support member is transmitted to a force point of the second member;
The second motion conversion device is configured to convert a rotational motion of the action point of the second member into a movement motion along the intersecting direction of the needle. . The winding device according to claim 2,
The first member is constituted by a plate-like member having a spiral groove,
The first motion conversion device includes a first connecting member provided between the first member and the second member, and one end side of the first connecting member is the second connecting member. The winding device is connected to the force point of the member, and the other end side is movably provided along the spiral groove of the first member. The winding device according to claim 2 or 3,
Unlike the stator core rotating shaft, the second member rotates using a rotating shaft parallel to the stator core rotating shaft as a fulcrum. The winding device according to any one of claims 2 to 4,
The winding device, wherein the second member is disposed on a plate-like member whose maximum outer diameter is smaller than the inner diameter of the stator core. The winding device according to any one of claims 2 to 5,
The needle has a groove extending along a direction intersecting the intersecting direction;
The second motion conversion device includes a third member movable along the groove of the needle, and a second connecting member provided between the second member and the third member. The second connecting member has a first end connected to the operating point of the second member and a second end connected to the third member.

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