Wire Insertion Device

Abstract

To provide a wire insertion device that can suppress damage to an insulation member arranged in a slot.SOLUTION: The present disclosure is a wire insertion device for inserting a wire in an axial direction of a core for a slot provided in a cylindrical core. The wire insertion device comprises: a guide that is configured to be inserted into the slot and has a contact part against which a tip end part of the wire is pressed; and a driving portion that is configured to insert the wire from the tip end part into the slot with the wire pressed against the contact part of the guide.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to a wire passing device. [Background technology]

[0002] In a motor equipped with a stator with distributed winding of wire, a structure in which the wire is inserted into a slot of a core is known (see Patent Document 1). Between the slot of the core and the wire, an insulating member such as insulating paper is arranged to maintain an insulating distance. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-234504 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned manufacturing process of the stator, the insulating member is placed in the slot of the core and then the wire is inserted into the slot, so that the tip of the wire may come into contact with the insulating member, which may cause damage to the insulating member.

[0005] An aspect of the present disclosure aims to provide a wire insertion device that can suppress damage to an insulating member arranged in a slot. [Means for solving the problem]

[0006] One aspect of the present disclosure is a wire insertion device for inserting a wire into a slot provided in a cylindrical core in an axial direction of the core. The wire insertion device includes a guide configured to be inserted into the slot and having a contact portion against which a tip end of the wire is pressed, and a drive unit configured to insert the wire into the slot from the tip end while the wire is pressed against the contact portion of the guide.

[0007] According to this configuration, the wire is inserted into the slot with the tip of the wire pressed against the contact portion of the guide, thereby suppressing the vibration of the tip of the wire during insertion (i.e., movement in the radial or circumferential direction of the core), and as a result, damage to the insulating member in the slot due to the tip of the wire coming into contact with the insulating member can be suppressed.

[0008] In one aspect of the present disclosure, the contact portion may have a restricting portion that restricts the tip of the wire from moving in a radial direction or a circumferential direction of the core. With this configuration, it is possible to reliably suppress the wobble of the tip of the wire.

[0009] In one aspect of the present disclosure, the restricting portion may include a wall surrounding at least a portion of the tip of the wire. With this configuration, the tip of the wire can be covered by the contact portion while accurately suppressing the vibration of the tip of the wire, thereby enhancing the effect of suppressing damage to the insulating member.

[0010] According to an aspect of the present disclosure, the wire may further include an elastic body that biases the guide in the axial direction of the core. With this configuration, the guide can be moved in the axial direction of the core while maintaining a restoring force by the pressing force of the wire against the contact portion. This allows the position of the guide corresponding to each slot to be changed when multiple wires are inserted into multiple slots at the same time, so that the positions of the multiple wires after insertion can be aligned between the slots. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic cross-sectional view of a stator in an embodiment. [Diagram 2] 2A is a schematic side view of the stator of FIG. 1, and FIG. 2B is a schematic enlarged cross-sectional view of a slot of FIG. [Diagram 3] FIG. 3 is a schematic diagram of a wire insertion device according to an embodiment. [Figure 4]4A is a schematic front view of the guide of FIG. 3, FIG. 4B is a schematic plan view of the guide of FIG. 3, FIG. 4C is a schematic side view of the guide of FIG. 3, and FIG. 4D is a schematic enlarged view of the contact portion of FIG. 4C. [Diagram 5] FIG. 5 is a schematic diagram showing a state in which the wire has been inserted into the slot in the wire insertion device of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings. [1. First embodiment] [1-1. Configuration] <Stator> The present disclosure is directed to an apparatus used in the manufacturing process of the motor stator 100 shown in FIG.

[0013] The stator 100 includes a core 101 and a plurality of wires 103. The core 101 is a cylindrical magnetic body. The core 101 is provided with a plurality of slots 102 that penetrate the core 101 in the axial direction. The plurality of slots 102 are arranged at equal intervals in the circumferential direction of the core 101.

[0014] 2A, the multiple wires 103 are inserted into the slots 102 in the axial direction of the core 101. In this embodiment, multiple (six in the figure) wires 103 are inserted into one slot 102.

[0015] The multiple wires 103 form multiple phase coils by being electrically connected to each other wire 103. The wires 103 are, for example, copper conductors coated with enamel.

[0016] In this embodiment, the coating of wire 103 is removed at tip 103A, which is inserted into slot 102, to expose the conductor. Wire 103 has a U-shape in which two wires are connected at head 103B on the opposite side to tip 103A.

[0017] 2B, the cross-sectional shape of the wire 103 in this embodiment perpendicular to the axial direction is a rectangle with chamfered corners. However, the cross-sectional shape of the wire 103 is not limited to a rectangle and may be a circle. The multiple wires 103 are arranged side by side in the radial direction of the core 101 within one slot 102.

[0018] A cylindrical insulating paper 104 is inserted as an insulating member into the slot 102. The insulating paper 104 surrounds the multiple wires 103 inside the slot 102. In other words, the insulating paper 104 separates the inner surface of the slot 102 from the multiple wires 103.

[0019] <Wire insertion device> The wire insertion device 1 shown in FIG. 3 includes a wire aligning section 2, a plurality of guides 3, a driving section 4, and a supporting section 5. The wire aligning section 2 includes a wire aligning section 2, a plurality of guides 3, a driving section 4, and a supporting section 5.

[0020] (Wire alignment section) The wire alignment section 2 holds a plurality of wires 103 in an aligned state before they are inserted into the core 101 .

[0021] The wire alignment section 2 has a holding section 21 and a clamp section 22. The holding portion 21 collectively holds the heads 103B of a set of wires 103 that are inserted into one slot 102.

[0022] Clamp portion 22 is displaceable between a release position indicated by a solid line and a clamped position indicated by a dashed line in Fig. 3. Clamp portion 22 clamps a set of wires 103 in the radial direction of core 101 at the clamped position.

[0023] Specifically, the clamp portion 22 fixes the plurality of wires 103 between the heads 103B and the tips 103A of the wires 103 (at two locations, near the heads 103B and near the tips 103A in this embodiment).

[0024] The holding portion 21 suppresses the occurrence of variation in the height (that is, the position in the insertion direction) of the wire 103. Furthermore, the clamp portion 22 suppresses the occurrence of variation in the position of the wire 103 in the radial direction of the core 101.

[0025] (guide) The guide 3 is configured to be insertable into the slot 102 of the core 101. One guide 3 is provided for each slot 102. As shown in FIGS. 4A, 4B, and 4C , the guide 3 has a main body 31, a contact portion 32, and an elastic body arrangement portion 33.

[0026] The main body 31 is a rod-shaped part. A contact portion 32 is disposed at one end of the main body 31. An elastic body disposing portion 33 is disposed at the other end of the main body 31. The length of the main body 31 (i.e., the longitudinal dimension) is greater than the length of the slot 102 in the axial direction of the core 101.

[0027] The contact portion 32 is a portion against which the tip portion 103A of the wire 103 is pressed when the wire 103 is inserted into the slot 102. A plurality of wires 103 inserted into the same slot 102 are pressed against the contact portion 32 at the same time.

[0028] 4D, the contact portion 32 of the present embodiment has a restricting portion that restricts the tip portion 103A of the wire 103 from moving in the radial and circumferential directions of the core 101. The restricting portion includes a plurality of first walls 32A and a plurality of second walls 32B.

[0029] The first wall 32A is a wall facing the tip portion 103A of the wire 103 in the radial direction (the left-right direction in FIG. 4D) of the core 101. In this embodiment, a plurality of first walls 32A are arranged so as to sandwich each of the wires 103 pressed against the contact portion 32 in the radial direction of the core 101.

[0030] The second wall 32B is a wall facing the tip portion 103A of the wire 103 in the circumferential direction of the core 101 (the vertical direction in FIG. 4D ). In this embodiment, a plurality of second walls 32B are arranged so as to sandwich each of the wires 103 pressed against the contact portion 32 in the circumferential direction of the core 101.

[0031] The first wall 32A and the second wall 32B each surround at least a portion of the tip 103A of the wire 103. The tip 103A of the multiple wires 103 is disposed in a recess having a rectangular contact surface 32C as a bottom surface, the contact surface 32C being surrounded by the first wall 32A and the second wall 32B. The shape of the contact surface 32C is designed to match the cross-sectional shape of the tip 103A of the wire 103.

[0032] The first wall 32A and the second wall 32B may surround the tip portions 103A of the wires 103 collectively, instead of surrounding each tip portion 103A of the wires 103. In other words, the contact portion 32 may have, as a restricting portion, a recess in which the tip portions 103A of the wires 103 are disposed.

[0033] 4A and 4B, in this embodiment, the contact portion 32 is formed in a stepped shape when viewed from the circumferential direction of the core 101. That is, the contact portion 32 has a plurality of abutment surfaces 32C that are positioned at different positions in the axial direction of the core 101. This allows the positions of the tip portions 103A of the plurality of wires 103 to be shifted after insertion into the slots 102, as shown in FIG. 2A.

[0034] (Drive unit) The driving unit 4 shown in FIG. 3 is configured to insert a plurality of wires 103 from their tips 103A into the slots 102 of the core 101 with the wires 103 pressed against the contact portions 32 of the guide 3.

[0035] Specifically, when the guides 3 are inserted into each slot 102 of the core 101 (see FIG. 3), the drive unit 4 moves the wire 103 pressed against the guides 3 toward the core 101, thereby replacing the guides 3 in the slots 102 with the wire 103.

[0036] 5, the wire 103 is inserted into the slot 102. In this embodiment, the wire 103 is inserted into the slot 102 from top to bottom with respect to the fixed core 101. As the wire 103 moves, the guide 3 is pulled out downward from the slot 102 of the core 101.

[0037] (Support part) The support portion 5 mainly supports the guide 3. The support portion 5 has a base 51 and a plurality of elastic bodies 52. The base 51 constitutes the foundation of the wire insertion device 1.

[0038] The multiple elastic bodies 52 are attached to the base 51 and are arranged in the elastic body arrangement portion 33 of each guide 3. The elastic bodies 52 are springs whose expansion and contraction axes are parallel to the insertion direction of the wire 103. The elastic bodies 52 bias the guide 3 in the axial direction of the core 101 toward the wire 103.

[0039] When the wire 103 is pressed against the contact portion 32 of the guide 3, the elastic body 52 contracts, thereby adjusting the positions of the guide 3 and the tip portion 103A of the wire 103. When the pressing of the wire 103 is released, the elastic body 52 restores (i.e., expands) the guide 3 to the position it was in before the wire 103 was pressed against it.

[0040] <How to insert the wire> Next, a description will be given of a wire insertion method using the wire insertion device 1 shown in Fig. 3. This method includes a wire aligning step, a pressing step, and a slot insertion step.

[0041] In the wire alignment process, the holding portion 21 and the clamp portion 22 of the wire alignment unit 2 align the multiple wires 103 according to the arrangement of the multiple slots 102 of the core 101 .

[0042] In the pressing step, while the multiple wires 103 are held by the holding portion 21 and the clamp portion 22, the tip portion 103A of each wire 103 is pressed against the contact portion 32 of the guide 3 in the insertion direction into the slot 102. At this time, each guide 3 is inserted into the slot 102.

[0043] In the slot insertion process, first, the clamp unit 22 releases the fixation of the multiple wires 103 while maintaining the heads 103B of the multiple wires 103 held by the holding unit 21. Next, the drive unit 4 relatively moves the holding unit 21 and the multiple wires 103 toward the core 101 through which the multiple guides 3 are inserted. During this time, the multiple wires 103 move while being pressed against the contact portions 32 of the guides 3 by the holding unit 21.

[0044] When the multiple wires 103 move to a position where they penetrate the slots 102 by a certain amount, the insertion of the wires 103 into the slots 102 is completed. The core 101 with the wires 103 inserted therethrough is removed from the wire insertion device 1 and is subjected to the next processing step.

[0045] [1-2. Effects] According to the embodiment described above in detail, the following effects can be obtained. (1a) By inserting the wire 103 into the slot 102 with the tip 103A of the wire 103 pressed against the contact portion 32 of the guide 3, it is possible to suppress vibration of the tip 103A of the wire 103 (i.e., movement in the radial or circumferential direction of the core 101) during insertion. As a result, it is possible to suppress damage to the insulating member (i.e., the insulating paper 104) in the slot 102 caused by the tip 103A of the wire 103 coming into contact with the insulating member.

[0046] (1b) The first wall 32A and the second wall 32B accurately suppress vibration of the tip portion 103A of the wire 103, while the tip portion 103A of the wire 103 can be covered by the contact portion 32. This enhances the effect of suppressing damage to the insulating member.

[0047] (1c) By attaching the elastic body 52 to the guide 3, the pressing force of the wire 103 against the contact portion 32 can move the guide 3 in the axial direction of the core 101 while maintaining a restoring force. This allows the position of the guide 3 corresponding to each slot 102 to be changed when multiple wires 103 are inserted simultaneously through multiple slots 102, so that the positions of the multiple wires 103 after insertion can be aligned between the slots 102.

[0048] 2. Other embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take various forms.

[0049] (2a) In the wire insertion device 1 of the above embodiment, the number of wires inserted through one slot may be one. In other words, the number of wires pressed against one guide may be one.

[0050] (2b) In the wire insertion device 1 of the above embodiment, the contact portion of the guide does not necessarily have to have a wall. The contact portion may have a regulating portion that regulates the movement of the wire by means other than a wall (e.g., a pillar, etc.). Furthermore, the contact portion of the guide does not necessarily have to have a regulating portion. For example, the contact portion of the guide may maintain the position of the wire by friction caused by pressing against it.

[0051] (2c) In the wire insertion device 1 of the above embodiment, the support portion does not necessarily have to have an elastic body.

[0052] (2d) In the wire insertion device 1 of the above embodiment, the wire may be inserted into the slot by the driving unit moving the core relative to the wire. Also, the wire may be inserted into the slot by the driving unit moving both the wire and the core.

[0053] (2e) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. In addition, a part of the configuration of the above embodiments may be omitted. In addition, at least a part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. Note that all aspects included in the technical idea identified from the wording of the claims are embodiments of the present disclosure. [Explanation of symbols]

[0054] 1...wire insertion device, 2...wire alignment unit, 3...guide, 4...driving unit, 5...support unit, 21: holding portion, 22: clamp portion, 31: main body, 32: contact portion, 32A: first wall, 32B: second wall; 32C: contact surface; 33: elastic body arrangement portion; 51: base; 52...elastic body, 100...stator, 101...core, 102...slot, 103...wire, 103A...tip portion, 103B...head portion, 104...insulating paper.

Claims

1. A wire insertion device for inserting a wire in an axial direction of a cylindrical core through a slot provided in the core, a guide configured to be inserted into the slot in which the insulating member is disposed, the guide having a contact portion against which the tip of the wire is pressed; a drive unit configured to insert the wire from the tip end into the slot while the wire is pressed against the contact portion of the guide; Equipped with The wire is formed to be longer than the length of the slot, The contact portion provided on one of the guides is configured so that the tip portions of the plurality of wires are pressed against the contact portion. Wire insertion device.

2. The wire insertion device according to claim 1, The contact portion has a restricting portion that restricts the tip portion of the wire from moving in a radial or circumferential direction of the core.

3. The wire insertion device according to claim 2, The wire insertion device, wherein the regulating portion includes a wall that surrounds at least a portion of the tip end of the wire.

4. The wire insertion device according to any one of claims 1 to 3, The wire insertion device further comprises an elastic body that biases the guide in the axial direction of the core.

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