Device for manufacturing rotor

Abstract

To provide a device for manufacturing a rotor capable of easily performing mounting work of a regulation jig to a rotor core.SOLUTION: A jig main body 51 is divided in a circumferential direction C by a plurality of divided bodies 52. In a regulated state in which the divided bodies 52 form a cylindrical shape, a divided surface 53 of the divided bodies 52 adjacent to each other is inclined at a certain angle with respect to a radial direction R. A support member 60 is provided correspondingly to each of the divided bodies 52, and has a plurality of shaft units 62 extending in an axial direction A. The divided bodies 52 have a plurality of insertion units 54 into which the respective shaft units 62 are inserted and that guide relative movement of the divided bodies 52 with respect to the support member 60. In the restricted state, the insertion units 54 extend in an inclined manner so that one side of the circumferential direction C is located further outwardly in the radial direction R. An operation unit 70 applies force to move one divided body 52A in the circumferential direction C.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to an apparatus for manufacturing a rotor. [Background technology]

[0002] Patent Document 1 describes a resin filling device that fills magnet housing holes of a rotor core with thermoplastic resin. The resin filling device described in Patent Document 1 has an upper mold and a lower mold. The upper die has an upper die main body portion having a contact surface that contacts the upper surface of the rotor core, and a fixing block that protrudes downward from the contact surface and is inserted into the axial hole of the rotor core.

[0003] The lower mold has a lower mold main body and a runner plate. The runner plate is attached to an upper surface of the lower mold main body. The runner plate has an upper surface on which the rotor core is placed. The lower mold main body has a sprue passage that guides resin supplied from a nozzle of an injection molding machine. The runner plate has a branch passage and a gate passage. The branch passage is connected to the downstream end of the sprue passage and extends radially toward each magnet accommodating hole. The gate passage extends from the downstream end of each branch passage toward the end face of the rotor core and is configured to be connectable to the magnet accommodating hole.

[0004] In such a resin filling device, molten thermoplastic resin flows from a nozzle of an injection molding machine into a sprue passage, and then passes through each branch passage and a gate passage to fill each magnet housing hole. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2016 / 147211 Summary of the Invention [Problem to be solved by the invention]

[0006] However, when filling the magnet accommodating holes with resin, the filling pressure of the resin filling the magnet accommodating holes may cause the rotor core to deform outward. For this reason, in the rotor manufacturing device, it is preferable to provide a regulating jig that abuts against the entire outer circumferential surface of the rotor core to regulate the deformation of the outer circumferential surface outward. In this case, in order to facilitate the attachment and detachment of the regulating jig to the rotor core, it is preferable that the regulating jig is divided into a plurality of segments in the circumferential direction of the rotor core, and that the segments are connected to each other by a connecting member. In this case, the greater the number of segments, the easier it is for the regulating jig to follow variations in the outer diameter of the rotor core.

[0007] However, as the number of divided bodies increases, the number of connecting members between the divided bodies also increases, which creates a tradeoff in that the work of attaching and detaching the regulating jig becomes more time-consuming. [Means for solving the problem]

[0008] A rotor manufacturing apparatus for solving the above-mentioned problems is an apparatus for manufacturing a rotor including a cylindrical rotor core having a center hole and a plurality of magnet accommodating holes, magnets accommodated in the magnet accommodating holes, and resin filled in the magnet accommodating holes to fix the magnets to the rotor core, the apparatus including a restricting jig having a cylindrical jig body that restricts deformation of the outer circumferential surface by contacting the outer circumferential surface of the rotor core, and a support member that supports the jig body, and when the axial direction, radial direction, and circumferential direction of the rotor core are simply defined as the axial direction, radial direction, and circumferential direction, respectively, the jig body is divided in the circumferential direction by a plurality of divided bodies, and the plurality of divided bodies form a cylindrical shape. In a regulated state, the dividing surfaces of adjacent divided bodies are inclined at a certain angle with respect to the radial direction, and one and the other of the multiple divided bodies and the support member are provided corresponding to the multiple divided bodies, respectively, and each have a multiple shaft portion extending along the axial direction and a multiple insertion portion into which the multiple shaft portions are respectively inserted and which guide the relative movement of the divided bodies with respect to the support member, and in the regulated state, the multiple insertion portions extend at an incline so that one side of the circumferential direction is located further outward in the radial direction, and are equipped with an operating portion that applies a force to one of the multiple divided bodies and either one of the support members to move in the circumferential direction.

[0009] According to this configuration, the cylindrical jig body is divided into a plurality of divided bodies in the circumferential direction. In addition, the plurality of divided bodies and one and the other of the support members supporting these divided bodies each have a plurality of shaft parts and a plurality of insertion parts. Therefore, when a force is applied by the operating part to move one of the divided bodies or one of the support members in the circumferential direction, the engagement between the insertion part and the shaft part causes each divided body to move in the circumferential direction and inward in the radial direction. Here, the division surfaces of adjacent divided bodies are inclined at a certain angle with respect to the radial direction. Therefore, when the divided bodies move as described above, interference between adjacent divided bodies can be suppressed. In this way, the jig body can be expanded and contracted by simply moving one divided body or the support member in the circumferential direction by the operating part. Therefore, the installation work of the regulating jig to the rotor core can be easily performed. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a rotor manufactured using a rotor manufacturing apparatus according to one embodiment. [Diagram 2] FIG. 2 is a cross-sectional view of the rotor of FIG. [Diagram 3] FIG. 3 is a cross-sectional view showing a rotor manufacturing apparatus according to one embodiment. [Figure 4] FIG. 4 is a plan view showing the restriction tool and the operation portion in the restricted state. [Diagram 5] FIG. 5 is a plan view showing the regulating jig and the operating portion in the released state. [Figure 6] FIG. 6 is a cross-sectional view showing a first modified example of a rotor manufacturing apparatus. [Figure 7] FIG. 7 is a plan view showing the support member and the operating portion of FIG. [Figure 8] FIG. 8 is a cross-sectional view showing a second modified example of the rotor manufacturing apparatus. [Figure 9] FIG. 9 is a plan view showing the support member of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, one embodiment of a rotor manufacturing apparatus will be described with reference to FIGS. First, with reference to Figs. 1 and 2, a rotor 10 for an embedded magnet motor manufactured using a rotor manufacturing apparatus (hereinafter, manufacturing apparatus 20) according to the present embodiment will be described.

[0012] <Rotor 10> As shown in Figures 1 and 2, the rotor 10 comprises a cylindrical rotor core 11 having a central hole 12 and multiple magnet accommodating holes 14, magnets 15 accommodated in the magnet accommodating holes 14, and resin 16 filled in the magnet accommodating holes 14 and fixing the magnets 15 to the rotor core 11.

[0013] In the following description, the axial direction, radial direction, and circumferential direction of rotor core 11 will be simply referred to as axial direction A, radial direction R, and circumferential direction C, respectively. The rotor core 11 is formed of a laminate of a plurality of core pieces 13. The core pieces 13 are made of electromagnetic steel sheets.

[0014] A pair of keys 12a opposed to each other in the radial direction R protrude from the inner circumferential surface of the central hole 12 (see FIG. 1). The magnet accommodating holes 14 are provided in the circumferential direction C at intervals.

[0015] As shown in FIG. 2, the central hole 12 and each magnet accommodating hole 14 penetrate the rotor core 11 along the axial direction A. The magnet 15 has a rectangular parallelepiped shape extending along an axis L.

[0016] The resin 16 is, for example, a thermoplastic resin, and is preferably a liquid crystal polymer (LCP). Next, the manufacturing apparatus 20 will be described with reference to FIGS.

[0017] As shown in FIG. 3, the manufacturing apparatus 20 includes a first die 21, a second die 22, a support member 60, a first member 30, a jig body 51, an operation unit 70, and a second member 40. <Type 1 21 and Type 2 22> 3, the first die 21 is a fixed die. The second die 22 is a movable die, and is provided above the first die 21 so as to be movable up and down.

[0018] The second mold 22 is provided with a sprue passage 23 which is connected to a nozzle of an injection molding machine (not shown). <Support member 60> As shown in FIGS. 3 to 5, a support member 60 is disposed on the upper surface of the first die 21. As shown in FIG.

[0019] The support member 60 has a substantially square plate-shaped base portion 61 that is placed on the upper surface of the first die 21, and a substantially cylindrical post portion 63 that protrudes upward from the center of the upper surface of the base portion 61. 4 and 5, a pair of key grooves 63a, into which the respective key portions 12a of the rotor core 11 are inserted, is provided on the outer circumferential surface of the post portion 63 along the axial direction A. By inserting the key portions 12a of the rotor core 11 into the key grooves 63a of the post portion 63, the rotor core 11 is positioned relative to the base portion 61 in the circumferential direction C.

[0020] As shown in Figs. 3 to 5, a plurality of shaft portions 62 protruding upward are provided on the upper surface of the base portion 61, outside the rotor core 11 in the radial direction R. The plurality of shaft portions 62 extend along the axial direction A. The plurality of shaft portions 62 are disposed at equal intervals on a virtual circle centered on the axis of the post portion 63, i.e., the axis L of the rotor core 11. In this embodiment, eight shaft portions 62 are provided.

[0021] <First member 30> As shown in Figs. 3 to 5, a disk-shaped first member 30 having a central hole 32 is disposed on the upper surface of a support member 60. A post portion 63 is inserted into the central hole 32. A pair of key portions 32a facing each other in the radial direction R is provided on the inner circumferential surface of the central hole 32 (see Figs. 4 and 5). The pair of key portions 32a are inserted into a pair of key grooves 63a of the post portion 63.

[0022] The outer diameter of the first member 30 is smaller than the distance between the axis of the post portion 63 and the shaft portion 62 . 3, the rotor core 11 is placed on the upper surface of the first member 30. With the lower end face 11a of the rotor core 11 in contact with the first member 30, the upper surface of the first member 30 closes the lower openings 14a of the multiple magnet accommodating holes 14.

[0023] 3 to 5, a plurality of protrusions 31 for suspending the magnets 15 from the upper surface of the first member 30 are provided on the upper surface of the first member 30. The plurality of protrusions 31 are provided at positions that respectively overlap with the plurality of magnet accommodating holes 14 in the axial direction A.

[0024] <Jig body 51> 4 and 5, a jig body 51 having a plurality of divided bodies 52, which is cylindrical as a whole, and which restricts deformation of the outer circumferential surface 11c by contacting the outer circumferential surface 11c of the rotor core 11 is disposed on the upper surface of the first member 30. That is, the cylindrical jig body 51 is configured by being divided in the circumferential direction C by the plurality of divided bodies 52. The plurality of divided bodies 52 are provided corresponding to the plurality of shaft portions 62 of the base portion 61, respectively.

[0025] Hereinafter, the state in which the multiple divided bodies 52 form a cylindrical shape will be referred to as a restricted state. In the regulated state, the dividing surfaces 53 of adjacent divided bodies 52 are inclined at a certain angle with respect to the radial direction R so that they are positioned more outward in the radial direction R toward one side of the circumferential direction C (the front side in the clockwise direction in Figures 4 and 5).

[0026] The divided bodies 52 are provided with a plurality of insertion portions 54 into which the shaft portions 62 are respectively inserted and which guide the relative movement of the divided bodies 52 with respect to the support member 60 . The multiple insertion portions 54 penetrate the divided body 52 along the axial direction A. That is, the multiple divided bodies 52 are supported by the multiple shaft portions 62 of the support member 60, respectively.

[0027] In the restricted state, the multiple insertion portions 54 extend at an incline so as to be positioned more outward in the radial direction R toward one side in the circumferential direction C (the front side in the clockwise direction in FIGS. 4 and 5). The lower end surfaces 52a of the multiple divided bodies 52 face the upper surface of the base portion 61 (see FIG. 3).

[0028] Of the multiple divided bodies 52, one divided body 52A has a protrusion 55 provided on its outer circumferential surface. In this embodiment, the restricting jig 50 is configured by a plurality of divided bodies 52 and a support member 60 .

[0029] <Operation unit 70> As shown in FIGS. 3 to 5, the operating section 70 includes a support portion 71 that protrudes upward from the upper surface of the base portion 61 outside the radial direction R of the divided body 52, and an operating member 72 supported by the support portion 71.

[0030] The support portion 71 has a female screw hole 71a extending along the tangential direction of the outer circumferential surface of the jig body 51 in the restricted state. The operating member 72 has a male screw portion that is screwed into the female screw hole 71a and extends along the tangential direction. The tip surface of the operating member 72 faces one side surface of the protruding portion 55 in the circumferential direction C (the front side in the clockwise direction in FIGS. 4 and 5).

[0031] By screwing the operating member 72 into the female screw hole 71a, the protrusion 55 is pressed to the other side in the circumferential direction C (the rear side in the clockwise direction in FIGS. 4 and 5), thereby applying a force to the divided body 52A to move it in the circumferential direction C. In addition, the operating member 72 restricts movement of the divided body 52A to one side in the circumferential direction C (the front side in the clockwise direction in FIGS. 4 and 5).

[0032] <Second member 40> 3, the second member 40 is disposed on the upper end surface 11b of the rotor core 11 so as to close the upper openings of the magnet accommodating holes 14, i.e., the opening 14b opposite to one opening 14a of the magnet accommodating holes 14. The second member 40 has a passage 41 for supplying resin 16 to the upper opening 14b.

[0033] The passage 41 has a plurality of branch passages 42 that are connected to the sprue passage 23 and extend radially outward in the radial direction R, and a plurality of gate passages 43 that extend from the outer ends of the branch passages 42 in the radial direction R toward the underside of the second member 40 along the axis L. The multiple gate passages 43 are provided in correspondence with the multiple magnet accommodating holes 14, respectively.

[0034] Next, a method of attaching the regulating jig 50 to the rotor core 11 and the operation of this embodiment will be described with reference to FIGS. First, as shown in Fig. 5, prior to attaching the regulating jig 50 to the rotor core 11, the worker rotates the operating member 72 to release the pressing state of the protruding portion 55 by the operating member 72 (hereinafter referred to as the released state). The worker applies an external force to the outer periphery of each divided body 52 with his / her own hand, thereby moving each divided body 52 along the insertion portion 54 and separating the divided bodies 52 from each other. Next, the worker places the rotor core 11 on the upper surface of the first member 30 so that the post portion 63 is inserted into the central hole 12 of the rotor core 11 shown by the two-dot chain line in Fig. 5.

[0035] Next, as shown in FIG. 4, the operating member 72 is rotated to press the protruding portion 55 with the tip of the operating member 72, thereby moving the divided body 52A on which the protruding portion 55 is provided to the front side in the counterclockwise direction of FIG. 4. At this time, when the operating unit 70 applies a force to move the divided body 52A in the circumferential direction C, the engagement between the insertion portion 54 and the shaft portion 62 causes each divided body 52 to move in the circumferential direction C and inward in the radial direction R. Here, the division surfaces 53 of the divided bodies 52 adjacent to each other are inclined at a certain angle with respect to the radial direction R. Therefore, when the divided bodies 52 move as described above, it is possible to suppress interference between the divided bodies 52 adjacent to each other. In this way, the diameter of the jig body 51 can be reduced and the jig body 51 can be attached to the outer circumferential surface 11c of the rotor core 11 simply by moving one divided body 52A in the circumferential direction C with the operating unit 70.

[0036] 3, magnets 15 are inserted into each magnet accommodating hole 14 from the upper opening 14b. Then, the second member 40 is placed on the upper end face 11b of the rotor core 11. Then, the rotor core 11 in which the magnets 15 are accommodated is transported to the upper surface of the first die 21 together with the support member 60, the first member 30, the jig body 51, and the second member 40. Then, the second die 22 is lowered so that the lower surface of the second die 22 abuts against the upper surface of the second member 40.

[0037] Next, molten resin is supplied to each branch passage 42 from the sprue passage 23 of the second die 22. As a result, the resin 16 is filled into each magnet accommodating hole 14 through each gate passage 43.

[0038] Thereafter, the resin 16 is cooled, whereby the magnets 15 are fixed to the rotor core 11. Next, the effects of this embodiment will be described.

[0039] (1) In a restricted state in which the multiple segments 52 form a cylindrical shape, the dividing surfaces 53 of adjacent segments 52 are inclined at a certain angle with respect to the radial direction R. In the restricted state, the multiple insertion portions 54 extend at an incline so as to be positioned more outward in the radial direction R toward one side of the circumferential direction C (the front side in the clockwise direction in FIGS. 4 and 5). The operating portion 70 applies a force to one segment 52A to move it in the circumferential direction C.

[0040] According to such a configuration, the above-mentioned effect is achieved, and therefore the operation of attaching the regulating jig 50 to the rotor core 11 can be easily performed. (2) The multiple divisions 52 have insertion portions 54. The support member 60 has a base portion 61 and multiple shaft portions 62 protruding from the base portion 61. The operating portion 70 applies a force to one of the divisions 52A to move it in the circumferential direction C.

[0041] According to this configuration, by applying a force to one divided body 52A to move it in the circumferential direction C, the movement of each divided body 52 can be linked to the movement of the divided body 52A. This makes it possible to simplify the configuration of the operating unit 70 for applying a force to each divided body 52 to move it in the circumferential direction C.

[0042] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined with each other to the extent that there is no technical contradiction.

[0043] A biasing member may be provided to bias the divided body 52A forward in the clockwise direction. In this case, when the pressing state of the protruding portion 55 by the operating member 72 is released, the biasing force of the biasing member biases the protruding portion 55 forward in the clockwise direction, so that each divided body 52 moves to the released state shown in FIG.

[0044] For example, as shown in FIG. 6 and FIG. 7, the manufacturing apparatus 120 includes a first support member 180 having a first base portion 181 and a post portion 182 corresponding to the base portion 61 and the post portion 63 of the above embodiment, respectively. A second support member 160 is provided on the outer circumferential side of the first member 30. The second support member 160 has an annular second base portion 161 facing the lower end surface 52a of the divided body 52 in the axial direction A, and a plurality of shaft portions 162 protruding from the upper surface of the second base portion 161. A protrusion 165 protruding to the outer circumferential side is provided on the outer circumferential surface of the second base portion 161. The second base portion 161 is disposed on the upper surface of the first base portion 181 so as to be rotatable about the axis L of the rotor core 11. The inner circumferential surface of the second base portion 161 is in sliding contact with the outer circumferential surface of the first member 30. The operation unit 170 has an actuator 172 having a drive shaft 173 extending along the tangential direction of the rotor core 11, and a link mechanism 171 connecting the drive shaft 173 and the protruding portion 165. The actuator 172 is configured to be able to change the protruding amount of the drive shaft 173 in the tangential direction of the rotor core 11. The operation unit 170 applies a force to the second base portion 161 to rotate it in the circumferential direction C via the link mechanism 171 by changing the protruding amount of the drive shaft 173. Therefore, when the operation unit 170 applies a force to the second support member 160 to move it in the circumferential direction C, the engagement between the insertion portion 54 and the shaft portion 162 causes each divided body 52 to move in the circumferential direction C and inward in the radial direction R. As a result, the jig main body 51 can be expanded or contracted simply by moving the second support member 160 in the circumferential direction C by the operation unit 170. Therefore, the operation of attaching the regulating jig 50 to the rotor core 11 can be easily performed.

[0045] For example, as shown in FIG. 8 and FIG. 9, the support member 260 has a base portion 261 and a post portion 263 corresponding to the base portion 61 and the post portion 63 of the above embodiment. The upper surface of the base portion 261 is not provided with a plurality of shaft portions 62, but instead has a plurality of insertion portions 262. The shaft portion 254 protrudes downward from the lower surface of each divided body 252. The insertion portions 262 are arranged at equal intervals in the circumferential direction C. The insertion portions 262 extend at an inclination so as to be positioned more outward in the radial direction R toward one side of the circumferential direction C (the front side in the clockwise direction in FIG. 9). The configuration of the operation unit 70 is the same as that of the above embodiment. Therefore, when the operation unit 70 applies a force to move one divided body 252A in the circumferential direction C, the engagement between the insertion portion 262 and the shaft portion 254 causes each divided body 252 to move in the circumferential direction C and inward in the radial direction R. In this manner, the jig body 251 can be expanded or contracted simply by moving one divided body 252A in the circumferential direction C by the operating part 70. Therefore, the attachment operation of the regulating jig 250 to the rotor core 11 can be easily performed.

[0046] In this embodiment, the shaft portion 62 is provided integrally with the base portion 61, but the first member 30 may be expanded in diameter so as to face the entire lower end surface 52a of each divided body 52, and the shaft portion 62 may be provided integrally with the first member 30. In this case, the first member 30 functions as a support member. [Explanation of symbols]

[0047] 10...Rotor 11...Rotor core 11a, 11b...end surface 11c...Outer surface 12...Center hole 12a...Key section 13...Iron core piece 14...Magnet receiving hole 14a,14b...opening 15…Magnet 16…Resin 20,120…Manufacturing equipment 21…Type 1 22…2nd type 23...Sprue passage 30…First member 31...Protrusion 32...Center hole 32a...Key section 40…Second member 41...Aisle 42... Branch passage 43...Gate passage 50,250…Regulation jig 51,251…Jig body 52,252…divided field 52a...Lower end surface 52A,252A…Divided body 53…Divided plane 54,262…Insertion part 55...Protruding part 60,260…Support member 61,261…Base 62,162,254…Shaft 63,182,263…Post section 63a...Key groove 70,170…Operation unit 71...Support part 71a... Female thread hole 72...Operation member 160...Second support member 161…Second base part 165...Protrusion 171...Link mechanism 172...Actuator 173…Drive shaft 180...First support member 181…First base section

Claims

1. An apparatus for manufacturing a rotor including a cylindrical rotor core having a center hole and a plurality of magnet accommodating holes, magnets accommodated in the magnet accommodating holes, and a resin filled in the magnet accommodating holes to fix the magnets to the rotor core, A regulating jig including a cylindrical jig main body that abuts against an outer peripheral surface of the rotor core to regulate deformation of the outer peripheral surface, and a support member that supports the jig main body, When the axial direction, radial direction, and circumferential direction of the rotor core are simply defined as the axial direction, radial direction, and circumferential direction, respectively, The jig body is configured by being divided in the circumferential direction by a plurality of divided bodies, In a restricted state in which the plurality of divided bodies are cylindrical, dividing surfaces of the adjacent divided bodies are inclined at a certain angle with respect to the radial direction, one of the plurality of divided bodies and the other of the support member is provided corresponding to the plurality of divided bodies, and each of the divided bodies has a plurality of shaft portions extending along the axial direction, and a plurality of insertion portions into which the plurality of shaft portions are inserted, the insertion portions guiding relative movement of the divided bodies with respect to the support member, The insertion portions extend in an inclined manner so that, in the restricted state, one side in the circumferential direction is positioned more outward in the radial direction, an operating unit that applies a force to move one of the plurality of divided bodies or the support member in the circumferential direction; Rotor manufacturing equipment.

2. a first member abutting against one end surface of the rotor core and closing one opening of the plurality of magnet accommodating holes; a second member disposed to close an opening on an opposite side to the one opening in the plurality of magnet accommodating holes, the second member having a passage for supplying the resin to the opening on the opposite side, The plurality of divided bodies each have the insertion portion, the support member has a base portion facing one end surface of the divided body in the axial direction, and a plurality of the shaft portions protruding from the base portion, The operation unit applies a force to the one of the divided bodies to move it in the circumferential direction. An apparatus for manufacturing a rotor according to claim 1.

3. a first member abutting against one end surface of the rotor core and closing one opening of the plurality of magnet accommodating holes; a second member disposed to close an opening on an opposite side to the one opening in the plurality of magnet accommodating holes, the second member having a passage for supplying the resin to the opening on the opposite side, The plurality of divided bodies each have the insertion portion, the support member has a base portion facing one end surface of the divided body in the axial direction, and a plurality of the shaft portions protruding from the base portion, The operation unit applies a force to the base unit to move the base unit in the circumferential direction. An apparatus for manufacturing a rotor according to claim 1.

4. a first member abutting against one end surface of the rotor core and closing one opening of each of the magnet accommodating holes; a second member disposed to close an opening on an opposite side to the one opening in the plurality of magnet accommodating holes, the second member having a passage for supplying the resin to the opening on the opposite side, the support member has a base portion facing one end surface of the divided body in the axial direction, and a plurality of the insertion portions provided on the base portion, The plurality of divided bodies are provided with the shaft portion. An apparatus for manufacturing a rotor according to claim 1.

Images