Winding nozzles and winding machines

Abstract

A winding nozzle is used in a winding machine to form a coil by winding a wire around an iron core. It has a cylindrical shape. The wire is pulled out from a front end face, and the winding nozzle moves around the iron core to wind the wire around the iron core. The winding nozzle includes: a first end face, which is a fixed side end face of the nozzle holding part of the winding machine; a second end face, which is the front end face from which the wire is pulled out; a winding passage part, which extends from the first end face along the length direction of the winding nozzle to the second end face, so that the wire passes from the first end face to the second end face; and a front end slot, which communicates with the winding passage part and is formed into a slot on the second end face. The front end slot extends from a first side face constituting the outer periphery of the winding nozzle to a second side face constituting the outer periphery of the winding nozzle and opposite to the first side face at the second end face. The winding passage part is inclined relative to a central axis extending along the length direction of the winding nozzle, and the direction of inclination of the winding passage part relative to the central axis is opposite to the extension direction of the front end slot part.

Description

Technical Field

[0001] This disclosure relates to a winding nozzle for manufacturing coils and a winding machine, and in particular to the shape of the nozzle for leading out the winding. Background Technology

[0002] Traditionally, coils used in the stator of electric motors are manufactured by winding wire around an iron core that constitutes the stator. Coil manufacturing utilizes a winding machine. A winding machine includes a wire feed nozzle for supplying the wire and a wire feed nozzle holder for holding the nozzle. In the winding machine, when winding the wire around the iron core, the wire is drawn from the nozzle mounted on the horizontally moving wire feed nozzle holder and wound around the iron core. The winding machine moves the nozzle around the iron core with its tip pointing outwards, winding the wire around the iron core to form a coil.

[0003] The wire nozzle, for example, has a cylindrical shape and a fixed side end face fixed to the wire nozzle holding portion, and a front end face on the side where the wire is pulled out. In addition, the wire nozzle has a wire passing portion formed in such a way that the wire passes from the fixed side end face to the front end face (for example, see Patent Document 1).

[0004] In one embodiment described in Patent Document 1, the winding passage is a winding insertion groove formed in the shape of a slot on the side of the wire nozzle body. The winding insertion groove extends from the fixed end face along the axial direction of the wire nozzle to the front end face.

[0005] When the winding passage is slotted, the winding is always stretched during the winding of the stator by the winding machine, so the winding will not fall off the winding insertion slot. However, when the winding machine is temporarily stopped and restarted, the winding sometimes falls off the winding insertion hole. Additionally, the stator core is provided with an insulating material. The insulator has lap wiring connecting the stator teeth, or terminals, etc., fixed to it. When the winding passage is slotted, the winding sometimes falls off the winding insertion hole when the winding is wound around the insulator or when lap wiring is laid between the teeth. When the winding falls off the winding insertion hole, the winding operation cannot continue, so the winding machine needs to be temporarily stopped and the operator reinserts the winding into the winding insertion hole.

[0006] Therefore, Patent Document 1 also proposes the following embodiment: the winding passage is composed of a winding insertion hole in the shape of a through hole extending from the fixed side end face to the front end face. In any embodiment, the winding is inserted into the winding passage from the fixed side end face of the wire nozzle and pulled out from the front end face through the winding passage.

[0007] Patent Document 1: International Publication No. 2020 / 065853

[0008] As described above, the wire nozzle disclosed in Patent Document 1 has a winding passage portion formed to allow wire to pass through. Furthermore, the winding passage portion is formed in a groove shape or a through-hole shape, as described above.

[0009] When the winding passage is groove-shaped, the following problem exists: when the winding machine restarts, during the winding action of winding the wire to the insulator, or when the overlap line between the teeth is formed, the wire may fall off the wire nozzle.

[0010] On the other hand, when the winding passage is a through-hole shape, the winding will not fall off the wire nozzle. However, compared to the slot shape, when the winding passage is a through-hole shape, the bending angle of the winding increases when it is inserted into the winding insertion hole. Therefore, the winding is not smoothly inserted into the winding insertion hole, and a larger tensile load is applied to the winding. That is, there is a problem that the winding is strongly stretched during the winding operation of the winding machine, resulting in an increase in the elongation of the winding. When the elongation of the winding increases, the resistance of the coil formed by the winding increases, which in turn increases the load on the motor.

[0011] Furthermore, in Patent Document 1, the front end face of the wire nozzle has an R-shape, and the pulled-out winding bends along this R-shape. With a large R-shape, excessive force is not applied to the winding, thus the elongation of the winding does not increase. Therefore, in Patent Document 1, when the winding passage is a through-hole shape, the winding insertion hole is formed at a position offset from the central axis of the wire nozzle to increase the R-shape. As a result, the inner wall of the wire nozzle on the side where the winding insertion hole is provided becomes thin, resulting in insufficient strength and unsuitability for winding under high tension. Summary of the Invention

[0012] This disclosure was made to solve the above-mentioned problems, and the purpose is to provide a winding nozzle and a winding machine that can prevent the wire from falling off the nozzle during the winding operation of the winding machine or other operations, and ensure the strength of the nozzle, thereby reducing the elongation of the wire.

[0013] The disclosed winding nozzle is used in a winding machine that winds a wire around an iron core to form a coil. It has a cylindrical shape, the wire being pulled out from a front end face, and the winding nozzle moves around the iron core to wind the wire around it. It comprises: a first end face, which is a fixed side end face of a nozzle holding portion mounted on the winding machine; a second end face, which is the front end face from which the wire is pulled out; a winding passage portion extending along the length direction of the winding nozzle from the first end face to the second end face, allowing the wire to pass through from the first end face to the second end face; and a front end groove portion communicating with the winding passage portion and formed as a groove on the second end face. The front end groove portion extends within the second end face from a first side surface constituting the outer periphery of the winding nozzle to a second side surface constituting the outer periphery of the winding nozzle and opposing the first side surface. The winding passage portion is obliquely disposed relative to a central axis extending along the length direction of the winding nozzle, and the direction of the obliqueness of the winding passage portion relative to the central axis is opposite to the extension direction of the front end groove portion.

[0014] The winding machine disclosed herein includes: at least one winding nozzle as described above; a nozzle holding portion that holds the winding nozzle; and a drive unit that moves the nozzle holding portion in a horizontal direction.

[0015] According to the winding nozzle and winding machine disclosed herein, it is possible to prevent the winding from falling off the nozzle during the winding action or other actions of the winding machine, and to ensure the strength of the nozzle, thereby reducing the elongation of the winding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing the overall structure of the winding machine 100 according to Embodiment 1.

[0017] Figure 2 This is a top view showing an example of the construction of the stator 10 used in electric motors, etc.

[0018] Figure 3 yes Figure 2 The side view of the stator 10 shown.

[0019] Figure 4 This is a diagram showing an example of a state where the stator 10 is installed.

[0020] Figure 5 This is a perspective view of the winding nozzle 50 when the winding machine 100 of Embodiment 1 forms a coil 2 in the iron core 1.

[0021] Figure 6 yes Figure 5 Top view.

[0022] Figure 7This is a top view showing the operation of the winding nozzle 50 when the connecting wire 3A is placed on the iron core 1 by means of the winding machine 100 of Embodiment 1.

[0023] Figure 8 This is a perspective view of the winding nozzle 50 of the winding machine 100 according to Embodiment 1.

[0024] Figure 9 This is a perspective view of the winding nozzle 50 of the winding machine 100 according to Embodiment 1.

[0025] Figure 10 This is a partially enlarged perspective view of the front end face 56 of the winding nozzle 50 of the winding machine 100 in Embodiment 1.

[0026] Figure 11 These are (a) a cross-sectional view and (b) a side view showing the structure of the winding nozzle 50 of the winding machine 100 of Embodiment 1.

[0027] Figure 12 This is an explanatory diagram showing the state of the winding 3 after it passes through the winding nozzle 50 of the winding machine 100 of Embodiment 1.

[0028] Figure 13 This is an explanatory diagram showing the state of the winding 3 after it passes through the winding nozzle 50 of the winding machine 100 of Embodiment 1.

[0029] Figure 14 This is a schematic diagram showing the state in which the winding wire 3 is wound around the teeth 1a of the iron core 1 in the winding machine 100 of Embodiment 1.

[0030] Figure 15 This is an explanatory diagram showing the cross-sectional structure of the iron core 1 with coil 2 formed by the winding machine 100 of Embodiment 1.

[0031] Figure 16 This is a comparative example of the winding nozzle 50 of the winding machine 100 in Embodiment 1, and an explanatory diagram showing the structure of the winding nozzle 150 described in Patent Document 1.

[0032] Figure 17 It is a schematic representation of passing. Figure 16 The diagram illustrates the state of the winding 3 after the winding nozzle 150 is used in the comparative example.

[0033] Figure 18 It is a schematic representation of passing. Figure 16 The diagram illustrates the state of the winding 3 after the winding nozzle 150 is used in the comparative example.

[0034] Figure 19 It is an explanatory diagram showing the relationship between the radius of curvature and the steepness of the curve. Detailed Implementation

[0035] Hereinafter, embodiments of the winding nozzle and winding machine of this disclosure will be described with reference to the accompanying drawings. This disclosure is not limited to the following embodiments, and various modifications can be made without departing from the spirit of this disclosure. Furthermore, this disclosure includes all combinations of structures that can be combined, as shown in the following embodiments and their modifications. Additionally, components labeled with the same reference numerals in each figure correspond to the same or equivalent components, which is common throughout the specification. Furthermore, there may be instances in the drawings where the relative dimensional relationships or shapes of the constituent components differ from reality.

[0036] Implementation method 1.

[0037] Figure 1 This is a schematic diagram showing the overall structure of the winding machine 100 according to Embodiment 1. Figure 2 This is a top view showing an example of the construction of the stator 10 used in electric motors, etc. Figure 3 yes Figure 2 The side view of the stator 10 shown. Figure 3 The side of an iron core 1 constituting the stator 10 is shown. The winding machine 100 is used, for example, to form the motor 20 (see reference). Figure 4 The device for the coil 2 of the stator 10. The winding machine 100 forms the coil 2 by winding the winding wire 3 around the iron core 1 that constitutes the stator 10.

[0038] like Figure 1 As shown, the iron core 1 has teeth 1a and a slot surface 1b. However... Figure 1 In the diagram, core 1 is schematically indicated that core 1 is not limited to Figure 1 The shape shown. (As shown) Figure 2 As shown, the stator 10 is formed by arranging multiple iron cores 1 in a circular shape. The number of iron cores 1 can be arbitrary, depending on the specifications and application of the motor 20. Figure 3 As shown, each iron core 1 has a U-side insulator 4 and an L-side insulator 5. The U-side insulator 4 and L-side insulator 5 are integrally formed with the iron core 1, or separately formed U-side insulator 4 and L-side insulator 5 are installed on the iron core 1. The U-side insulator 4 and L-side insulator 5 are made of insulating components and have insulating properties. A connection wire 3A (see reference) connecting each coil 2 is fixed to the U-side insulator 4 and L-side insulator 5. Figure 7 ), or equipped with terminals (not shown), etc.

[0039] The stator 10 is formed as follows. First, as described later. Figure 5As shown, with multiple iron cores 1 connected in a straight line, a winding machine 100 winds a winding wire 3 onto the slot surface 1b of each iron core 1 to form a coil 2. After the coil 2 is formed on the slot surface 1b of each iron core 1, the multiple iron cores 1 connected in a straight line are made into a ring shape, and the iron cores 1 at both ends of the multiple connected iron cores 1 are joined together by welding or other means, thereby forming... Figure 2 The circular stator 10 is shown.

[0040] Figure 4 This diagram illustrates an example of a state where a stator 10 is installed. The stator 10 is, for example, built into an electric motor 20. The electric motor 20 consists of a stator 10 and a rotor 11. As described above, the stator 10 is formed by arranging a plurality of iron cores 1 in a circular ring, thus forming a cylindrical portion on the inner circumference of each iron core 1. The rotor 11 is disposed within the cylindrical portion of the stator 10. The rotor 11 has a cylindrical shape and is fixed to a rotating shaft 12. The rotor 11 is driven to rotate by the rotation of the rotating shaft 12. Figure 4 An example of a compressor 200 used in an outdoor unit of an air conditioner (not shown), etc., is shown with the motor 20 mounted thereon. The motor 20 is disposed within the housing 200a of the compressor 200. A compression mechanism 200b is provided at the lower part of the housing 200a. The compression mechanism 200b compresses the refrigerant drawn in from the suction port 200c of the compressor 200 and discharges the compressed refrigerant from the discharge port 200d of the compressor 200. The compression mechanism 200b is driven by the motor 20. The motor 20 supplies power to the coil 2 from the wiring connected to the stator 10, and drives the rotor 11 to rotate using the magnetic field generated by the coil 2 and the iron core 1.

[0041] like Figure 1 As shown, the winding machine 100 includes: a wire nozzle holding section 61 on which a winding nozzle 50 is mounted; a drive unit 60 that moves the wire nozzle holding section 61 in a horizontal direction; and a pair of pulleys 62 that guide the winding 3. Furthermore, the winding machine 100 includes: a tensioning section 63 that adjusts the tension of the winding 3; and a winding bobbin 64 that stores the winding 3.

[0042] As indicated by arrow 90, the wire nozzle holding part 61 is controlled by the drive unit 60. Figure 1 The object moves horizontally in the X and Z directions. The X direction is the width direction corresponding to the left and right directions of the paper, and the Z direction is the depth direction orthogonal to the X direction. The Y direction is the vertical direction orthogonal to both the X and Z directions. The X and Z directions can be, for example, horizontal directions, and the Y direction can be, for example, vertical directions.

[0043] The winding 3 is pulled out from the winding bobbin 64, guided by a pair of pulleys 62 through the tensioning part 63, and passes through the wire nozzle holding part 61. The winding 3, having passed through the wire nozzle holding part 61, is pulled out from the front end of the winding nozzle 50 held by the wire nozzle holding part 61. The front end of the winding 3 is fixed to the iron core 1, and the winding 3 is wound around the slot surface 1b of the tooth 1a. Furthermore, the winding machine 100 includes a control device 80, which controls at least the drive unit 60, the tensioning part 63, and the mechanism that rotates the winding nozzle 50.

[0044] Here, the hardware structure of the control device 80 is described. The control device 80 is composed of processing circuitry. The processing circuitry is composed of dedicated hardware or a processor. Dedicated hardware may be, for example, an ASIC (Application Specific Integrated Circuit) or a FPGA (Field Programmable Gate Array). The processor executes a program stored in memory. The control device 80 has a storage unit (not shown). The storage unit is composed of memory. The memory may be a non-volatile or volatile semiconductor memory such as RAM (Random Access Memory), ROM (Read Only Memory), flash memory, or EPROM (Erasable Programmable ROM), or a disk such as a magnetic disk, floppy disk, or optical disk.

[0045] Figure 5 This is a perspective view of the winding nozzle 50 when the winding machine 100 of embodiment 1 forms a coil 2 in the iron core 1. Figure 6 yes Figure 5 A top view. As in Embodiment 1... Figure 5 and Figure 6 As shown, with the stator 10 unfolded in a straight line with its cores 1 arranged in a linear fashion, the winding 3 is wound around each core 1 to form a coil 2. Figure 5 As shown, the winding nozzle 50 has a cylindrical shape and an internal winding passage portion 51 for the winding wire 3 to pass through. In Embodiment 1, the winding machine 100 is provided with three winding nozzles 50. Figure 6 As shown, the winding machine 100 moves three winding nozzles 50 simultaneously to simultaneously wind the winding wire 3 onto the slot surface 1b of the teeth 1a of the three iron cores 1 from the first to the third from the right. Figure 5 As shown, the winding nozzle 50 is configured such that the direction through which the winding 3 passes, i.e., the axis of the winding nozzle 50, is orthogonal to the surface of the stator 10 after it is unfolded. The winding nozzle 50 travels along... Figure 6The trajectory t shown indicates movement. That is, the winding nozzle 50 moves around the tooth 1a in a manner that draws a roughly rectangular shape, winding the winding thread 3 around the tooth 1a. Furthermore, the winding nozzle 50 is configured to be able to move about its central axis A as an axis... Figure 6 The direction of rotation is the direction of the rotation r. Additionally, Figure 6 The trajectory t shown is an example; the winding nozzle 50 can also move around the tooth 1a in a manner that depicts other shapes. Additionally, the rotation direction r... Figure 6 The example shown is counterclockwise, but it can also be the opposite direction (i.e., clockwise).

[0046] Figure 7 This is a top view showing the operation of the winding nozzle 50 when the lap joint 3A is placed on the iron core 1 using the winding machine 100 of Embodiment 1. (If using...) Figure 5 and Figure 6 As explained, in Embodiment 1, the winding machine 100 simultaneously winds the winding 3 onto the teeth 1a of the three iron cores 1. That is, in Embodiment 1, firstly, as... Figure 6 As shown, the winding 3 is simultaneously wound around the teeth 1a of the three iron cores 1 from the first to the third from the right to form the coil 2. Next, as... Figure 7 As shown, the positions of the three winding nozzles 50 are moved, and the winding 3 is simultaneously wound around the teeth 1a of the three iron cores 1 from the fourth to the sixth from the right to form a coil 2. In this way, the winding machine 100 groups the three iron cores 1 together and winds them into the three iron cores 1. Figure 7 Arrow D1 forms coils 2 sequentially for each group. When transitioning from forming one group of coils 2 to the next, the winding 3 is not cut; instead, a connecting wire 3A is laid between groups, and the winding 3 is wound onto the teeth 1a of the next group. Thus, the connecting wire 3A refers to the winding 3 laid between the teeth 1a of two adjacent groups. Figure 7 In the example, a connecting line 3A is provided from the first tooth 1a of the rightmost iron core 1 to the fourth tooth 1a of the rightmost iron core 1. Similarly, a connecting line 3A is provided from the second tooth 1a of the rightmost iron core 1 to the fifth tooth 1a of the rightmost iron core 1, and from the third tooth 1a of the rightmost iron core 1 to the sixth tooth 1a of the rightmost iron core 1.

[0047] Figure 8 and Figure 9 This is a perspective view of the winding nozzle 50 of the winding machine 100 according to Embodiment 1. Figure 10 This is a partially enlarged perspective view of the front end face 56 of the winding nozzle 50 of the winding machine 100 in Embodiment 1. Figure 10 Showing from Figure 8 and Figure 9 Observe the state of the front end face 56 from the lower side. Figure 10 In the middle, dashed lines are used for illustration. Figure 8 and Figure 9 The front-end open section 70 is shown. Figure 11 These are (a) a cross-sectional view and (b) a side view showing the structure of the winding nozzle 50 of the winding machine 100 of Embodiment 1. Figure 11 (b) shows the front end face 56. Hereinafter, using... Figures 8-11 The structure of the winding nozzle 50 is explained.

[0048] like Figures 8-11 As shown, in Embodiment 1, the winding nozzle 50 has a cylindrical shape. For example... Figure 11 As shown in (a), a winding passage portion 51 for passing the winding 3 is provided in the winding nozzle 50. The winding passage portion 51 is composed of a through hole portion 71 having a through hole shape and a front opening portion 70 that is formed in an open state relative to the external opening.

[0049] One end of the winding nozzle 50 is fixed to Figure 1 The winding machine 100 shown has a fixed-side end face 55 (first end face) of the wire nozzle holding part 61. The winding wire 3 is inserted into the winding passage part 51 through the winding insertion port 55a provided on the fixed-side end face 55. The other end of the winding nozzle 50 is a front end face 56 (second end face). After passing through the winding passage part 51, the winding wire 3 is pulled out from the winding supply part 56a on the front end face 56 and used for the winding operation towards the gear 1a. Furthermore, the shape of the winding nozzle 50 is not limited to a cylindrical shape; other shapes can be adopted as long as the winding wire 3 passes from the fixed-side end face 55 to the front end face 56. That is, the winding nozzle 50 can be, for example, an elliptical cylinder with an elliptical base, or a polygonal prism with a polygonal base, etc.

[0050] Figure 1 The winding machine 100 shown uses a wire nozzle holding part 61 to hold and fix the fixed side end face 55 of the winding nozzle 50. Furthermore, the winding machine 100 allows the winding wire 3 to pass through the winding passage part 51 from the fixed side end face 55 of the winding nozzle 50 to the front end face 56, and pulls the winding wire 3 out from the winding supply part 56a of the front end face 56 of the winding nozzle 50. Moreover, as shown... Figure 6 As shown, the winding machine 100 moves the winding nozzle 50 around the teeth 1a of the iron core 1, thereby winding the winding 3 pulled from the winding supply section 56a of the front end face 56 onto the teeth 1a.

[0051] like Figure 11As shown in (a), a winding passage portion 51 extending along the longitudinal direction of a cylindrical shape is provided in the winding nozzle 50. The winding passage portion 51 extends from the fixed side end face 55 toward the front end face 56 in the longitudinal direction (axial direction) of the winding nozzle 50, so that the winding 3 passes from the fixed side end face 55 to the front end face 56. The winding passage portion 51 has a through hole portion 71 having a through hole shape and a front end opening portion 70 formed in an open state. The through hole portion 71 is composed of a through hole that extends from the winding insertion port 55a provided on the fixed side end face 55 to the front end opening portion 70 formed on the side surface 50a of the winding nozzle 50.

[0052] like Figure 8 and Figure 11 As shown in (a), the winding insertion port 55a, which is provided on the fixed side end face 55, is disposed in the center portion of the fixed side end face 55. That is, as Figure 11 As shown in (a), the winding insertion port 55a is provided on the central axis A of the winding nozzle 50 within the fixed side end face 55 of the winding nozzle 50. However, the winding insertion port 55a does not necessarily have to be positioned on the central axis A of the winding nozzle 50. That is, the winding insertion port 55a can be slightly offset from the central axis A of the winding nozzle 50. In this case, the winding insertion port 55a is offset from the central axis A of the winding nozzle 50 to a degree that the inner wall surface 51a of the winding passage portion 51 is not thin-walled.

[0053] Hereinafter, for the purpose of explanation, the side surface 50a constituting the outer periphery of the main body of the winding nozzle 50 will be described. Figure 11 The upper lateral portion in (a) is called "lateral 50a-1", and the lower lateral portion is called "lateral 50a-2".

[0054] like Figure 11 As shown in (a), the through hole portion 71 of the winding passage portion 51 is configured to be inclined relative to the central axis A of the winding nozzle 50. More specifically, the length direction of the inner wall surface 51a of the winding passage portion 51 is inclined at an angle α relative to the central axis A of the winding nozzle 50.

[0055] The through-hole portion 71 of the winding passage portion 51 extends from the winding insertion port 55a to the front opening portion 70. The through-hole portion 71 has an inner wall surface 51a. On the other hand, as Figure 11 As shown in (a), the front opening 70 is formed on the side 50a-2 of the winding nozzle 50. Figure 8 and Figure 9 As shown, the front opening portion 70 has a rectangular opening 70a. Thus, the end portion on the front end face 56 side of the winding passage portion 51 becomes the front opening portion 70. The front opening portion 70 does not have an inner wall surface 51a of the winding passage portion 51, but is open to the outside.

[0056] like Figure 11As shown in (a), a winding supply section 56a is provided on the front end face 56 of the winding nozzle 50. The winding supply section 56a has a front end groove 52 formed in the shape of a groove and a winding supply port 53. The front end groove 52 is a groove formed on the front end face 56. The front end groove 52 extends radially from the side face 50a-2 (first side face) toward the side face 50a-1 (second side face) along the winding nozzle 50. Therefore, the extending direction of the front end groove 52 is... Figure 11 The direction of arrow D2 in (b). That is, in Figure 11 In (b) of the paper, the direction is from bottom to top. The extending direction of the front groove 52 is orthogonal to the central axis A of the winding nozzle 50. Furthermore, both ends of the extending direction of the front groove 52 open at the sides 50a-1 and 50a-2 of the main body of the winding nozzle 50. The end of the front groove 52 on the side 50a-1 becomes the winding supply port 53 for pulling out the winding 3. Additionally, as described above, the winding passage 51 is inclined relative to the central axis A of the winding nozzle 50. The direction of inclination of the winding passage 51 is... Figure 11 The direction of arrow D3 in (a). That is, in Figure 11 In (b) of the paper, the direction is from top to bottom. That is, the winding passage portion 51 is inclined in the direction from side 50a-1 (second side) toward side 50a-2 (first side). In this way, the winding passage portion 51 is inclined in the opposite direction to the extending direction of the front end groove portion 52.

[0057] The winding passage 51 is interconnected with the front end slot 52. That is, the winding passage 51 and the front end slot 52 are connected to form a channel for a winding 3. Figure 11 As shown in (a), the portion where the inner wall surface 51a of the winding passage portion 51 intersects with the inner wall surface 52a of the front end groove portion 52, i.e., the first intersection portion 57, is formed by a curved surface, and the inner wall surfaces 51a and 52a are connected in such a way that the inner wall surfaces 51a and 52a are continuous surfaces. In embodiment 1, although the first intersection portion 57 is in Figure 11 The cross section shown in (a) is in the shape of an arc, but it can also be other curved shapes, preferably composed of a smooth curve so that no cutting occurs when the winding 3 contacts.

[0058] In addition, such as Figure 11 As shown in (b), the portion where the inner wall surface 52a of the front groove 52 intersects with the side surface 50a-1 of the winding nozzle 50, i.e., the second intersection portion 58, is formed by a curved surface, and the inner wall surface 52a and the side surface 50a-1 are connected in such a way that the inner wall surface 52a and the side surface 50a-1 are continuous surfaces. That is, the entire edge line formed by the intersection of the inner wall surface 52a and the side surface 50a-1 is formed by a curved surface. In embodiment 1, although the second intersection portion 58 is in Figure 11(b) is an arc shape, but it can also be other curved shapes, preferably composed of smooth curves so that no cutting occurs when the winding 3 contacts.

[0059] In addition, Figure 11 In (a), length s is the length from the first cross portion 57 to the winding supply port 53 of the front end slot portion 52. Hereinafter, this portion of length s will be referred to as portion S. The longer the length s of portion S, the more smoothly the winding 3 can bend along the first cross portion 57. Conversely, the shorter the length s of portion S, the more sharply the winding 3 bends along the first cross portion 57. Regarding this principle, using... Figure 19 As will be described later. Therefore, in Embodiment 1, in order to maximize the length s relative to the diameter of the winding nozzle 50, the through hole 71 of the winding passage 51 is inclined, and a front opening 70 is provided at the front end of the winding passage 51. The front opening 70 opens on the side 50a-2 of the winding nozzle 50. According to this structure, the length s is maximized relative to the diameter of the winding nozzle 50.

[0060] In addition, such as Figure 11 As shown in (a), the third intersection 59, where the inner wall surface 51a of the winding passage portion 51 intersects with the fixed side end surface 55, is formed by a curved surface, and the inner wall surface 51a and the fixed side end surface 55 are connected in such a way that the inner wall surface 51a and the fixed side end surface 55 are continuous surfaces. Although the third intersection 59 is in Figure 11 The cross section of (a) is in the shape of an arc, but it can also be other curved shapes, preferably composed of a smooth curve so that no cutting occurs when the winding 3 contacts.

[0061] Figure 12 and Figure 13 This is an explanatory diagram showing the state of the winding 3 after it has passed through the winding nozzle 50 of the winding machine 100 in Embodiment 1. Figure 14 This is a schematic diagram showing the state in which the winding wire 3 is wound onto the teeth 1a of the iron core 1 in the winding machine 100 of Embodiment 1. Figure 12 As shown, the winding nozzle 50 includes a winding passage portion 51 formed from a fixed side end face 55 to a front end face 56 to allow the winding 3 to pass through, and a front end groove portion 52 formed in the shape of a groove on the front end face 56. The winding 3 passes through each part of the winding machine 100 and enters the winding passage portion 51 from the fixed side end face 55 of the winding nozzle 50, and reaches the front end face 56 along the winding passage portion 51.

[0062] like Figure 12As shown, the winding 3, after reaching the front end face 56, bends towards the side surface 50a-1 of the winding nozzle 50 along the curved surface of the portion where the winding passage 51 of the winding nozzle 50 intersects with the front end groove 52, i.e., the first intersection 57. Side surface 50a-1 is the surface opposite to the side surface 50a-2 where the front end opening 70 is formed. That is, side surface 50a-1 and side surface 50a-2 are arranged opposite each other. At the first intersection 57, the angle formed by the inner wall surface 51a of the winding passage 51 and the inner wall surface 52a of the front end groove 52 is angle β. Angle β is an acute angle less than 90°. Therefore, the winding 3 bends at angle β at the first intersection 57.

[0063] like Figure 13 As shown, the winding 3, bent at an angle β along the curved surface of the first intersection 57 toward the side surface 50a-1, advances along the front end groove 52. Then, along the curved surface of the second intersection 58, where the front end groove 52 intersects the side surface 50a of the winding nozzle 50, it is pulled out in a direction intersecting the length direction of the winding nozzle 50 and the extending direction of the front end groove 52. The angle formed by the tangent of the inner wall surface 52a of the front end groove 52 and the curved surface of the second intersection 58 is angle γ. Angle γ is, for example, an obtuse angle greater than 90°. Therefore, in the second intersection 58, the winding 3 bends at angle γ. Furthermore, the size of angle γ is not particularly limited. That is, angle γ can be 90° or less than 90°.

[0064] In Embodiment 1, the winding passage portion 51 is arranged at an angle relative to the central axis A of the winding nozzle 50. Therefore, compared to the case where the winding passage portion 51 is not tilted, the R-curve shape of the first crossing portion 57 is larger, and the radius R of the R-curve is larger. Embodiment 1 is a configuration in which the radius R or curvature of the first crossing portion 57 can be maximized relative to the diameter of the winding nozzle 50. Thus, if the R-curve shape of the first crossing portion 57 is larger, excessive force will not be applied to the winding 3, the tensile load on the winding 3 will be smaller, and therefore, an increase in the elongation of the winding 3 can be prevented.

[0065] Furthermore, in Embodiment 1, a front opening portion 70 is provided at the end of the winding passage portion 51 on the front end face 56 side, which opens onto the side surface 50a-2 of the main body of the winding nozzle 50. The front opening portion 70 does not have an inner wall surface 51a, but is open relative to the outside. Therefore, the winding 3 passing through the front opening portion 70 is not inhibited by the inner wall surface 51a. As a result, no excessive force is applied to the winding 3 passing through the front opening portion 70, and the winding 3 is not stretched forcefully, thus further preventing an increase in the elongation of the winding 3.

[0066] like Figure 14As shown, the winding nozzle 50 surrounds the tooth 1a and winds the winding 3 around the slot surface 1b. Here, the portion of the winding 3 wound around the slot surface 1b is called the winding portion 3a, and the portion located between the winding portion 3a and the front end slot 52 is called the winding pull-out portion 3b. At this time, the extending direction of the front end slot 52, indicated by arrow D2, is oriented to form an angle θ with respect to the winding pull-out portion 3b of the winding 3. Therefore, the winding 3 bends along the second intersection 58 at the portion pulled out from the front end slot 52.

[0067] The winding 3 is pressed against the curved surface of the second cross portion 58 and pulled out at the winding supply port 53 of the front groove 52 of the winding nozzle 50. As a result, the winding 3 warps relative to the slot surface 1b of the tooth 1a by means of the curved surface of the second cross portion 58. That is, the winding pull-out portion 3b warps in a manner that protrudes towards the slot surface 1b. The winding nozzle 50 preferably wraps around the tooth 1a while maintaining a constant angle θ between the front groove 52 and the winding pull-out portion 3b. Therefore, the control device 80 controls the horizontal position and rotation angle of the winding nozzle 50 to keep the angle θ constant. Thus, the winding nozzle 50 is controlled by the control device 80 to change its horizontal position and keep the rotation angle θ constant. Therefore, the winding 3 is always wound while being stressed relative to the slot surface 1b during winding around the tooth 1a.

[0068] Figure 15 This is an explanatory diagram showing the cross-sectional structure of the iron core 1 after the coil 2 has been formed using the winding machine 100 of Embodiment 1. Figure 15 In the middle, arrow 80, for example, represents Figure 1 The X direction, for example, arrow 81 indicates Figure 1 Y direction. Figure 15 The cross-section shown illustrates one of the iron cores 1 of the stator 10 used in conjunction with... Figure 2 The diagram shows a cross-section after the plane has been cut parallel to it. (As shown...) Figure 14 As shown, during the winding operation, the winding wire 3 is warped into an arc shape by the winding nozzle 50, with the apex 3c of this arc facing the slot surface 1b. On the other hand, as... Figure 15 As shown, the winding 3 extends in a direction perpendicular to the slot surface 1b, thus reducing the gap w between the slot surface 1b and the first layer of the coil 2, and consequently reducing the gaps in the second layer and beyond, so that the coil 2 is wound in a direction where it is tightened. In this way, if the gap w between the slot surface 1b and the winding 3, and the gap between the windings 3, are reduced, then correspondingly, the winding 3 is wound more extensively around the slot surface 1b, thus having the advantages of a higher winding duty cycle and a larger output of the motor 20. Furthermore, the winding 3 forming the coil 2 warps in a manner that protrudes towards the slot surface 1b, thus suppressing the coil 2 from bulging due to the rigidity of the winding 3.

[0069] Figure 16 This is a comparative example of the winding nozzle 50 of the winding machine 100 in Embodiment 1, and an explanatory diagram showing the structure of the winding nozzle 150 described in Patent Document 1. Figure 16 (a) is a side view showing the fixed end face 155 of the winding nozzle 150. Figure 16 (c) is a side view showing the front end face 156 of the winding nozzle 150. Additionally, Figure 16 (b) is a cross-sectional view of the winding nozzle 150. Figure 17 and Figure 18 It is a schematic representation of passing. Figure 16 The diagram illustrates the state of the winding 3 after the winding nozzle 150 is used in the comparative example.

[0070] Figures 16-18 The winding passage portion 151 of the comparative example winding nozzle 150 is shown as being constructed as a through hole. The winding passage portion 151 is a through hole extending from the fixed side end face 155 to the front end face 156. The winding passage portion 151 communicates with the front end groove portion 152 formed on the front end face 156. The winding passage portion 151 is configured to be parallel to the central axis A of the cylindrical winding nozzle 150. However, as... Figure 16 As shown in (b), the winding passage 151 is not positioned on the central axis A, but rather at a location offset from the central axis A. The reason for this is to increase... Figure 17 The length *s* of the portion is increased, and the radius of curvature *R* of this portion is increased. Hereinafter, this portion will be referred to as "part S". If the radius of curvature *R* increases, the length *s* of part S increases, and the curve forming part S becomes smoother. This principle will be explained below using... Figure 19 Let me explain. Figure 19 It is an explanatory diagram showing the relationship between the radius of curvature and the steepness of the curve.

[0071] Typically, a small portion of a curve near any known point can be approximated by a circle with a radius equal to the radius of curvature at that point. Figure 19 Comparing point V and point W in (b), we can see that, as with point V, if the radius of curvature is large, the curve is less curved; as with point W, if the radius of curvature is small, the curve is more curved (refer to point W).

[0072] exist Figure 19 In equation (a), point Q is the point P that has been displaced by a length s along curve L from point P on a certain curve L. If the part S of length s is regarded as an arc, the center of the circle is set as point C, and each PCQ is set as Δa, then the relationship between the radius R of the circle and the length s is expressed by the following equation (1). Here, π is the ratio of π to pi.

[0073] s=2πR×(Δa / 360°) (1)

[0074] Since π = 180°, if we rearrange equation (1), we get the following equation (2).

[0075] R = s / Δa (2)

[0076] That is, with the angle Δa constant, the radius R increases proportionally to the length s. If this principle is applied to... Figure 17 If the angle β1 remains constant, increasing the length s will increase the radius R of part S, and reduce the curvature of the curve in that part of S. Compared to the case where the winding passage 151 is positioned on the central axis A, as... Figure 17 As in the comparative example, the length s naturally increases when the winding passage portion 151 deviates from the central axis A. Therefore, in the comparative example, in order to make the curve portion S smoother, the winding passage portion 151 is offset from the central axis A.

[0077] As a result, the thickness of the inner wall portion 151a of the winding passage portion 151 in the comparative example becomes thin. With a thin inner wall portion 151a, it becomes insufficiently strong and unsuitable for winding operations under high tension. In contrast, in Embodiment 1, as... Figure 11 As shown in (a), the wall thickness of the portion where the strongest force is applied during the winding operation is increased. That is, in Embodiment 1, the wall thickness of the inner wall surface 51a near the winding insertion port 55a and near the winding supply port 53 is increased. Therefore, sufficient strength can be ensured, and the winding operation under high tension can be coped with.

[0078] In addition, such as Figure 17 As shown, in the comparative example, the winding passage portion 151 has an inner wall portion 151a that extends the entire length of the winding 3. Therefore, the movement of the winding 3 is restricted by the inner wall portion 151a, applying a tensile load to the winding 3. Furthermore, compared to Embodiment 1, since the radius of curvature R of the first intersection portion 157, which bends the winding 3 at an angle β1, is small, the R-curved surface shape of the first intersection portion 157 becomes smaller. If the R-curved surface shape becomes smaller, excessive force is applied to the winding 3, causing the winding 3 to be stretched forcefully, thereby increasing the elongation of the winding 3. If the elongation of the winding 3 increases, the resistance of the winding 3 increases, which in turn increases the resistance of the motor 20. In contrast, in Embodiment 1, the winding passage portion 51 is arranged at an angle relative to the central axis A. Therefore, Figure 11 The length s shown is Figure 17 The length s of the comparative example is further increased. Therefore, in Embodiment 1, the radius R of the R-curved surface shape of the first intersection 57, which is bent at an angle β around the winding 3, is increased, and the R-curved surface shape of the first intersection 57 becomes gentler. Furthermore, the length s of the comparative example is further increased. Figure 17 and Figure 12 A comparison clearly shows that the angle β of the first intersection 57 in Embodiment 1 of this application is less than... Figure 17The angle β1 of the first intersection 157 in the comparative example is approximately 90°. According to the above equation (2), it can be clearly seen that the radius R and the angle Δa are inversely proportional, so it can be seen that the smaller the angle β, the larger the radius R. Thus, if the angle of the first intersection 57 is reduced, the R-surface shape of the first intersection 57 will correspondingly increase. If the R-surface shape increases, excessive force will not be applied to the winding 3, and the elongation of the winding 3 can be prevented from increasing.

[0079] Furthermore, in Embodiment 1, a front opening portion 70 is provided on the front end face 56 side of the winding nozzle 50, opening into the side surface 50a of the main body of the winding nozzle 50. The front opening portion 70 does not have an inner wall surface 51a at the opening 70a, but is in an open state. Therefore, no excessive force is applied to the winding 3 passing through the front opening portion 70, and the winding 3 is not subjected to strong stretching, thus further preventing an increase in the elongation rate of the winding 3. Additionally, as mentioned above, the longer the length s of the portion S, the smoother the R-curve shape of the first intersection portion 57. In Embodiment 1, by tilting the winding passage portion 51 and providing the front opening portion 70, the length s is extended to the maximum extent relative to the diameter of the winding nozzle 50. Therefore, in Embodiment 1, a structure that minimizes the tensile load on the winding 3 is achieved.

[0080] In addition, such as Figure 17 As shown, in the comparative example, the winding insertion port 155a is offset from the central axis A and is eccentrically positioned. Therefore, when the winding 3 is inserted from the winding insertion port 155a into the winding passage portion 151, as... Figure 17 As shown, the winding 3 needs to be inserted in a bent and deformed state. This applies excessive force to the winding 3, increasing its elongation. In contrast, in Embodiment 1, as... Figure 12 As shown, the winding insertion port 55a is disposed on the central axis A. Therefore, when the winding 3 is inserted into the winding passage portion 51 from the winding insertion port 55a, as... Figure 12 As shown, it is not necessary to deform the winding 3, so excessive force is not applied to the winding 3, and the elongation of the winding 3 can be prevented from increasing. In addition, in Embodiment 1, since the winding passage portion 51 is arranged at an angle, the winding 3 passes through smoothly, and the winding tensile load during the winding operation is small.

[0081] As described above, in Embodiment 1, the winding passage portion 51 is arranged at an angle relative to the central axis A of the winding nozzle 50. Therefore, compared to the case where the winding passage portion 51 is not angled, the R-curve shape of the first crossing portion 57 is larger, and the radius R of the R-curve is larger. Embodiment 1 is a configuration in which the radius R or curvature of the first crossing portion 57 can be maximized relative to the diameter of the winding nozzle 50. Thus, if the R-curve shape of the first crossing portion 57 is larger, excessive force will not be applied to the winding 3, the tensile load on the winding 3 will be smaller, and therefore, an increase in the elongation of the winding 3 can be prevented.

[0082] Furthermore, in Embodiment 1, a front opening portion 70 is provided at the end of the winding passage portion 51 on the front end face 56 side, which opens onto the side surface 50a-2 of the main body of the winding nozzle 50. The front opening portion 70 does not have an inner wall surface 51a, but is open relative to the outside. Therefore, the winding 3 through the front opening portion 70 is not inhibited by the inner wall surface 51a. As a result, no excessive force is applied to the winding 3 through the front opening portion 70, and the winding 3 is not stretched forcefully, thus further preventing an increase in the elongation of the winding 3.

[0083] Furthermore, in Embodiment 1, the winding passage portion 51 has a through hole portion 71 formed by a through hole. The through hole portion 71 has an inner wall surface 51a. Therefore, the winding 3 is covered by the inner wall surface 51a in the through hole portion 71, and thus will not detach from the winding nozzle 50. As a result, during the winding operation of the winding 3 of the winding machine 100, the wiring operation of the lap wire 3A, and the winding operation of the winding 3 towards the U-side insulator 4 and the L-side insulator 5, it is possible to prevent the winding 3 from falling off the winding nozzle 50.

[0084] In Embodiment 1, the winding passage portion 51 is arranged at an angle relative to the central axis A of the winding nozzle 50. Furthermore, the winding insertion port 55a is positioned at the center of the fixed-side end face 55. Additionally, the angle of the winding passage portion 51 is opposite to the extending direction of the front end slot portion 52. As a result, the inner wall surface 51a of the winding nozzle 50 becomes thick-walled near the winding insertion port 55a where the winding 3 is inserted and near the winding supply port 53 where the winding 3 is pulled out. This ensures the strength of the winding nozzle 50.

[0085] Explanation of reference numerals in the attached figures

[0086] 1…core; 1a…tooth; 1b…slot surface; 2…coil; 3…winding; 3A…lap joint; 3a…winding section; 3b…winding pull-out section; 3c…apex; 4…U-side insulator; 5…L-side insulator; 10…stator; 11…rotor; 12…rotating shaft; 20…motor; 50…winding nozzle; 50a…side; 50a-1…side; 50a-2…side; 51…winding passage; 51a…inner wall surface; 52…front end slot; 52a…inner wall surface; 53…winding supply port; 55…fixed side end face; 55a…winding insertion port; 56…front end face; 56a…winding supply section; 57…first cross section; 58…second cross section; 59…third cross section Fork; 60…Drive unit; 61…Wire nozzle holding part; 62…Pulley; 63…Tensioning part; 64…Winding bobbin; 70…Front end opening part; 70a…Opening part; 71…Through hole part; 80…Control device; 90…Arrow; 100…Winding machine; 150…Winding nozzle; 151…Winding passage part; 151a…Inner wall part; 155…Fixed side end face; 155a…Winding insertion port; 156…Front end face; 157…First crossing part; 158…Second crossing part; 200…Compressor; 200a…Housing; 200b…Compression mechanism; 200c…Inlet; 200d…Outlet; A…Central shaft; D1…Arrow; D2…Arrow; D3…Arrow.

Claims

1. A winding nozzle, used in a winding machine for winding a wire around an iron core to form a coil, having a cylindrical shape, wherein the wire is pulled out from a front end face, and the winding nozzle moves around the iron core to wind the wire around the iron core, characterized in that, have: The first end face is the fixed side end face of the wire nozzle holding part installed on the winding machine; The second end face is the front end face from which the winding is pulled out; A winding passage portion extends along the length of the winding nozzle from the first end face to the second end face, allowing the winding thread to pass from the first end face to the second end face; and The front end slot communicates with the winding passage and is formed into a slot shape on the second end face. The front end groove extends within the second end face from a first side surface constituting the outer periphery of the winding nozzle to a second side surface constituting the outer periphery of the winding nozzle and opposite to the first side surface. The winding passage is arranged at an angle relative to the central axis extending along the length direction of the winding nozzle. The direction in which the winding passage is inclined relative to the central axis is opposite to the extension direction of the front end groove.

2. The winding nozzle according to claim 1, characterized in that, The winding passage portion has a front opening portion, which is disposed at the end of the second end face side of the winding passage portion and communicates with the front opening groove portion. The front opening portion opens on the first side of the winding nozzle.

3. The winding nozzle according to claim 2, characterized in that, The winding passage has a through hole portion, which is formed by a through hole extending from the first end face to the front end opening portion.

4. The winding nozzle according to any one of claims 1 to 3, characterized in that, A winding insertion port for inserting the winding is provided at the end of the first end face side of the winding passage portion. The winding insertion port is disposed on the central shaft within the first end face of the winding nozzle.

5. The winding nozzle according to any one of claims 1 to 3, characterized in that, The first intersection where the inner wall surface of the winding passage intersects the inner wall surface of the front end groove is connected by a continuous surface based on a curved surface.

6. The winding nozzle according to any one of claims 1 to 3, characterized in that, The second intersection of the first side surface of the winding nozzle, which is located between the first end face and the second end face, and the inner wall surface of the front end groove, is connected by a continuous surface based on a curved surface.

7. The winding nozzle according to any one of claims 1 to 3, characterized in that, The third intersection where the first end face intersects the inner wall of the winding passage is connected by a continuous surface based on a curved surface.

8. A winding machine, characterized in that, have: At least one winding nozzle as described in any one of claims 1 to 7; The wire nozzle holding part holds the winding nozzle; and A drive unit that moves the wire nozzle holding part in a horizontal direction.

9. The winding machine according to claim 8, characterized in that, The winding nozzle is held by the nozzle holding part so that it can rotate about the central axis of the winding nozzle.

10. The winding machine according to claim 9, characterized in that, It also includes a control device that controls the horizontal position of the winding nozzle and its rotation angle about the central axis of the winding nozzle. When the portion of the winding from the front end groove of the winding nozzle to the winding portion of the teeth wound around the iron core is used as the winding pull-out portion, The control device controls the horizontal position and the rotation angle so that the angle between the winding pull-out portion and the extension direction of the front end groove portion becomes a constant value.

11. The winding machine according to any one of claims 8 to 10, characterized in that, At least one of the winding nozzles is composed of multiple winding nozzles. The multiple winding nozzles are configured to operate simultaneously.

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