Device for setting the rotor core holding fixture

Abstract

In the use of the rotor core holding fixture, the setting of the connecting rod is automated to improve the production efficiency of the magnet embedded core. The invention comprises: a base (42) on which a rotor core holding fixture (10) is placed; an opposing table (46) which is connected to the base (42) and is opposed to the base (42); a pressurizing device (48) which is arranged on the opposing table (46) and pressurizes the upper plate (14) of the rotor core holding fixture (10) on the base (42) toward the lower plate (12); a clamping device (126) which is arranged on the base (42) and holds each connecting rod (30) in a detachable manner and is movable between a detached position in which the connecting rod (30) is detached from the engaging groove (32, 34) and an engaged position in which the connecting rod (30) is engaged with the engaging groove (32, 34); and a fluid pressure cylinder device (120) which is arranged on the base (42) and drives each clamping device (126) between the detached position and the engaged position.

Description

Technical Field

[0001] The present invention relates to a setting device and a setting method for a rotor core holding fixture, and more particularly, to a setting device for a rotor core holding fixture used for manufacturing a magnet embedded type core. Background Art

[0002] As a magnet-embedded core for a rotating electrical machine such as an electric motor, a resin-sealed structure is known, which comprises: a rotor core having magnet insertion holes with openings at both end surfaces in the axial direction; magnet pieces arranged in the magnet insertion holes; and a resin filled in the magnet insertion holes in order to fix the magnet pieces in the rotor core.

[0003] As a manufacturing device for this type of magnet embedded core, a resin molding device is known, which has a fixed mold and a movable mold facing each other, and uses the fixed mold and the movable mold to pressurize the rotor core along the axial direction, and fills the magnet insertion hole with molten resin from a resin tank provided in the fixed mold or the movable mold (for example, patent documents 1 and 2).

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2014-79056

[0007] Patent Document 2: Japanese Patent Application Publication No. 2017-7353 Summary of the invention

[0008] Problem that the invention aims to solve

[0009] In the manufacture of a magnet embedded core using the above-mentioned resin molding device, the applicant, who is the same as the applicant of the present application, considered using a rotor core holding fixture, which has: a first plate and a second plate opposite to each other; and a connecting rod, which engages with a cut-out engagement groove opening toward the peripheral edge of the first plate and the second plate, and the flanges at both ends respectively abut against the first plate and the second plate, thereby connecting the first plate and the second plate to each other, and the rotor core holding fixture pre-clamps the rotor core arranged between the first plate and the second plate (PCT / JP2018 / 037977).

[0010] The present invention automates the arrangement of the connecting rods during use of the rotor core holding fixture, thereby improving the production efficiency of the magnet embedded core.

[0011] Means used to solve problems

[0012] The mounting device of one embodiment of the present invention comprises: a first plate and a second plate facing each other; and a connecting rod, which is engaged with a cut-out-shaped engaging groove opened on the periphery of the first plate and the second plate, so that the flanges at both ends abut against the first plate and the second plate respectively, thereby connecting the first plate and the second plate to each other, and arranging the rotor core between the first plate and the second plate. The mounting device for the rotor core holding fixture comprises: a base, on which the rotor core holding fixture is placed ; an opposing table, which is combined with the base and opposed to the base; a pressurizing device, which is installed on the opposing table and presses the second plate of the rotor core holding fixture on the base toward the first plate; a clamping device, which is installed on the base and holds each connecting rod and can move between a separation position in which the connecting rod is separated from the engaging groove and an engaging position in which the connecting rod is engaged with the engaging groove; and a driving device, which is arranged on the base and drives each clamping device between the separation position and the engaging position.

[0013] According to this structure, the installation of the connecting rod is automated, and the production efficiency of the embedded magnet type core is improved.

[0014] In the setting device of the above-mentioned embodiment, it is preferred that the rotor core includes a magnet insertion hole having openings on both end faces in the axial direction, the first plate includes a gate connected to an opening of the magnet insertion hole, the rotor core holding fixture also has a closing part, which is connected to the second plate via a compression spring part and abuts against one of the two end faces of the rotor core to close the other opening of the magnet insertion hole, and the connecting rod has an axial length that connects the first plate and the second plate to each other in such a way that the elastic force of the compression spring part becomes a specified value when the closing part closes the opening.

[0015] According to this configuration, the compressive force in the axial direction acting on the rotor core does not increase excessively, and the closing member closes the opening of the magnet insertion hole appropriately by the elastic force of the compression spring member.

[0016] In the setting device of the above-mentioned embodiment, it is preferred that the first plate and the second plate are respectively rectangular, and have the locking groove corresponding to at least two sides parallel to each other, and the clamping device is arranged to correspond to at least the two sides of the first plate and the second plate of the rotor core retaining clamp loaded on the base.

[0017] According to this configuration, the first plate and the second plate are reliably connected by the connecting rods engaged with the respective engaging grooves, and the installation of the respective connecting rods is automated.

[0018] In the setting device of the above-mentioned embodiment, it is preferred that the clamping device can be moved to a working position and a retreat position, the working position is located at a position corresponding to the position between the base and the opposing table, in the working position, the clamping device can move between the departure position and the engagement position, and in the retreat position, the clamping device will not interfere with the rotor core holding clamp that is moved in and out relative to the base.

[0019] According to this configuration, the rotor core holding jig can be efficiently carried in and out of the base without interfering with the clamping device.

[0020] In the setting device of the above-mentioned embodiment, it is preferred that the base and the opposing platform are opposed to each other with a gap in the up and down direction, the second plate located on the upper side has a larger outer profile than the first plate located on the lower side, and when the connecting rod is not gripped by the clamping device, the connecting rod only engages with the engaging groove of the second plate and is supported on the second plate in a suspended state.

[0021] According to this structure, the process of handling the connecting rod with respect to the first plate and the second plate is unnecessary, and the working efficiency is improved.

[0022] Effects of the Invention

[0023] As described above, according to the present embodiment, the installation of the connecting rods can be automated during use of the rotor core holding jig, and the production efficiency of the embedded magnet core can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a perspective view showing an example of a magnet embedded type core to which an installation device for a rotor core holding jig according to an embodiment of the present invention is applied.

[0025] Figure 2 This is a longitudinal sectional view of the magnet embedded type core.

[0026] Figure 3 is a longitudinal sectional view (along the Figure 4 sectional view along line III-III).

[0027] Figure 4 It is a top view of the rotor core holding jig used in this embodiment.

[0028] Figure 5 It is a front view showing a retracted state of the installation device of the rotor core holding jig according to the present embodiment.

[0029] Figure 6 This is a front view showing the chuck detached state of the setting device.

[0030] Figure 7 It is a front view showing the clamp engagement state of the setting device.

[0031] Figure 8 It is a top view of the clamping device of the setting device.

[0032] Fig. 9 It is a front view of a device for installing a rotor core holding jig according to another embodiment.

[0033] Fig.10 It is a longitudinal sectional view showing a state in which the lower movable member of the resin molding device for the embedded magnet type core is lowered.

[0034] Fig.11 It is a longitudinal sectional view showing a state in which the lower movable member of the resin mold manufacturing apparatus is raised.

[0035] Fig.12 It is a longitudinal sectional view showing the resin pressurizing state of the resin mold manufacturing apparatus. DETAILED DESCRIPTION

[0036] Preferred embodiments of the present invention will be described with reference to the accompanying drawings.

[0037] First, refer to Figure 1 and Figure 2 Next, a magnet embedded type core 1 manufactured using the installation device for the rotor core holding jig according to the embodiment of the present invention will be described.

[0038] The magnet embedded core 1 is a component of a rotating electric machine such as a motor, and includes a rotor core 2. The rotor core 2 is a laminated core formed by laminating a plurality of electromagnetic steel plates in a mutually bonded state by a known bonding method (riveting, welding, bonding, etc.), and the rotor core 2 is roughly annular in plan view, and has an axial hole 3 extending through the center in the axial direction.

[0039] The rotor core 2 is formed with a plurality of magnet insertion holes 4. Each magnet insertion hole 4 forms a substantially rectangular parallelepiped space, penetrates the rotor core 2 in the axial direction, and opens at the lower end surface 2A and the upper end surface 2B forming the two end surfaces of the rotor core 2. That is, each magnet insertion hole 4 is a through hole having openings at the two end surfaces in the axial direction of the rotor core 2. In the illustrated example, an example is shown in which the magnet insertion holes 4 are arranged at equal intervals at four locations in the circumferential direction of the rotor core 2, but the shape, number, and arrangement of the magnet insertion holes 4 are not limited thereto, and various changes can be made.

[0040] A roughly rectangular parallelepiped magnet piece 5 is housed in each magnet insertion hole 4. The magnet piece 5 can be composed of, for example, a permanent magnet (including a magnet piece before magnetization) such as a ferrite-based sintered magnet piece or a neodymium magnet piece. The size of each part of the magnet piece 5 is set to be smaller than the size of each part of the magnet insertion hole 4. As a result, a gap is formed between the rotor core 2 and the magnet piece 5 in the magnet insertion hole 4. The gap is filled with a resin 6. Each magnet piece 5 is fixed relative to the rotor core 2 by the resin 6 filled in the gap. As the resin 6, a thermosetting resin such as an epoxy resin can be used.

[0041] For example, Figure 1 As shown, each magnet piece 5 is arranged inwardly (toward the center of the rotor core 2) in the magnet insertion hole 4, and the outer surface facing the center of the rotor core 2 abuts against the inner surface of the magnet insertion hole 4 opposite to the outer surface. As a result, the radial arrangement position of each magnet piece 5 in the rotor core 2 is determined to be uniform, and combined with the magnet insertion holes 4 being arranged at equal intervals in the circumferential direction of the rotor core 2, the magnet pieces 5 will not become a factor of imbalance in the rotation direction of the rotor core 2. In addition, each magnet piece 5 can also be arranged in a direction biased to the center of the rotor core 2. Figure 1 The rotor core 2 is disposed on the side opposite to the position shown (on the outer peripheral side of the rotor core 2).

[0042] Next, refer to Figure 3 and Figure 4 A rotor core holding jig 10 for manufacturing a magnet embedded type core will be described.

[0043] The rotor core holding jig 10 has a lower plate (first plate) 12 and an upper plate (second plate) 14 that face each other.

[0044] The lower plate 12 is composed of a rectangular flat plate, and the rotor core 2 is placed on the lower plate 12 in such a manner that the flat lower end surface 2A contacts the flat upper surface 12A. The lower plate 12 includes a gate 20 connected to the opening (one opening) 4A on the lower side of each magnet insertion hole 4, and a material guide opening 22 connected to each gate 20 and each resin tank 80 of the resin molding device 60 described later.

[0045] The upper plate 14 is formed of a rectangular flat plate and faces the upper end surface 2B of the rotor core 2. The upper plate 14 suspends and supports the closing member 26 by bolts 24 for each magnet insertion hole 4 so that the closing member 26 can move in the up-down direction. Each closing member 26 includes a flat lower surface 26A having a larger area than the opening (the other opening) 4B on the upper side of the magnet insertion hole 4 and capable of abutting against the flat upper end surface 2B of the rotor core 2. The lower limit position of each closing member 26 is determined by abutting the head 24A of the bolt 24 against the shoulder-shaped bottom of the bolt through hole 14A formed in the upper plate 14.

[0046] Compression coil springs 28 are installed between the upper plate 14 and each of the closing members 26. The compression coil springs 28 are provided for each of the closing members 26, and apply force to the closing members 26 toward the lower plate 12. In the illustrated embodiment, the closing members 26 and the compression coil springs 28 are provided for each of the magnet insertion holes 4, but they may be provided for a plurality of magnet insertion holes 4 adjacent to each other.

[0047] The upper plate 14 has a larger outer profile than the lower plate 12 and includes a rectangular frame-shaped protruding portion 15 that protrudes outward from the outer edge of the lower plate 12 in a plan view.

[0048] The lower plate 12 and the upper plate 14 are connected to each other at four locations in front, back, left and right directions by connecting rods 30 extending vertically, respectively, in a state where the rotor core 2 is sandwiched between the lower plate 12 and the closing member 26 .

[0049] The following describes in detail the connection structure between the lower plate 12 and the upper plate 14 by the connection rods 30. Each connection rod 30 includes a rod-shaped portion 30A and flange portions 30B and 30C provided at upper and lower ends of the rod-shaped portion 30A.

[0050] The lower plate 12 and the upper plate 14 are respectively provided with cutout-shaped engaging grooves 32 and 34, which extend linearly in the left-right direction and open at the left and right outer edges (peripherals) of the plates 12 and 14 which are parallel to each other. The engaging grooves 32 and 34 are respectively provided to correspond to two parallel sides (left side and right side) of the lower plate 12 and the upper plate 14, and are aligned vertically, as shown in FIG. Figure 3 As shown in the partially enlarged three-dimensional views (A) and (B), the engaging grooves 32 and 34 respectively include slit-shaped openings 32B and 34B through which the rod-shaped portion 30A can pass, and the openings 32B and 34B are arranged at the groove 32A that can engage with the flange portions 30B and 30C of the connecting rod 30 and the bottom of the groove 34A, and the flange portions 30B and 30C abut against the groove 32A remaining on both sides of the openings 32B and 34B and the shoulders 32C and 34C formed by the bottom of the groove 34A.

[0051] In this way, each connecting rod 30 is engaged with the lower plate 12 and the upper plate 14, and each connecting rod 30 connects the lower plate 12 and the upper plate 14 to each other in such a way that the elastic force of each compression coil spring 28 becomes a predetermined value. The spring force of the compression coil spring 28 (the deflection amount of the compression coil spring 28) generated in this connected state is set to an appropriate value according to the axial length of the rod-shaped portion 30A.

[0052] Thus, each closing member 26 is pressed against the upper end surface 2B of the rotor core 2 by the elastic force of the compression coil spring 28 , and closes the upper opening 4B of the corresponding magnet insertion hole 4 .

[0053] The flanges 30B and 30C are entirely accommodated in the grooves 32A and 34A, and do not protrude below the lower plate 12 or above the upper plate 14. In addition, this structure is not essential, and the grooves 32A and 34A may be omitted depending on the structure of the plates, so that the flanges 30B and 30C protrude below the lower plate 12 or above the upper plate 14.

[0054] like Figure 3 As shown by the imaginary lines in the middle, each connecting rod 30 is located at the protruding portion 15 of the upper plate 14. Therefore, when each connecting rod 30 is not grasped by the clamping device 126 described later, it does not engage with the engaging groove 32 of the lower plate 12, but only engages with the engaging groove 34 of the upper plate 14, and can be supported on the upper plate 14 in a suspended state.

[0055] Thus, each connecting rod 30 is always suspended and supported on the upper plate 14, and selectively engages with the engaging groove 32 of the lower plate 12 by moving in the left and right directions. Therefore, there is no need to handle the connecting rod 30 relative to the lower plate 12 and the upper plate 14, thereby improving working efficiency.

[0056] The base (lower end) 36A of the plate pressing rod 36 is fixed to the lower plate 12 at two locations separated from each other, left and right and front and back. The plate pressing rod 36 includes a free end (upper end) 36B, which extends vertically upward from the lower plate 12, penetrates a through hole 38 formed in the upper plate 14 in a clearance fit state, and is located above the upper plate 14. In addition, the configuration location of the plate pressing rod 36 is not limited to two locations, and may be a plurality of locations greater than the number thereof.

[0057] By using the rotor core holding jig 10 described above, the axial compressive force acting on the rotor core 2 does not become excessive, and the closing member 26 closes the opening 4B of the magnet insertion hole 4 appropriately by the elastic force of the compression coil spring 28 .

[0058] Next, refer to Figures 5 to 8 , the setting device 40 for setting the rotor core 2 on the rotor core holding jig 10 will be described.

[0059] The installation device 40 includes: a flat base 42; a flat facing platform 46 which is arranged above the base 42 and faces the base 42 at a distance from each other by means of a plurality of column members 44 which are erected from the base 42; a fluid pressure type pressurizing device (cylinder-piston device) 48 which is mounted on the facing platform 46; and a flat pressurizing plate 52 which is mounted on a piston rod 50 of the pressurizing device 48. The pressurizing device 48 pressurizes the upper plate 14 of the rotor core holding jig 10 placed on the base 42 toward the lower plate 12 via the pressurizing plate 52.

[0060] On the left and right sides of the base 42, there are provided lifting platforms 112 that are guided by guide rails 110 and can move in the up-down direction. Each lifting platform 112 is moved up and down by a feed screw 116 driven by an electric motor 114. A cylinder mounting plate 118 is mounted on each lifting platform 112. A fluid pressure cylinder device (drive device) 120 is mounted on each cylinder mounting plate 118. Each fluid pressure cylinder device 120 has a piston rod 122 extending toward the inner side of the base 42. A clamping device mounting plate 124 is mounted on the end of each piston rod 122.

[0061] like Figure 8 As shown, two clamping devices 126 corresponding to each connecting rod 30 are installed on each clamping device mounting plate 124. Each clamping device 126 has a fixed clamping piece 128 fixed to the clamping device mounting plate 124 and a movable clamping piece 132 driven by an electromagnetic driver 130, and the rod-shaped portion 30A of the corresponding connecting rod 30 can be detachably held by the fixed clamping piece 128 and the movable clamping piece 132.

[0062] Each lifting platform 112 moves up and down between a retreat position and a working position through a feed screw 116. Figure 5 As shown, the clamping device 126 and the fluid pressure cylinder device 120 are located below the upper surface of the base 42. In the working position, Figure 6 and Figure 7 As shown, the clamp device 126 and the fluid pressure cylinder device 120 are located above the upper surface of the base 42.

[0063] When the lifting platform 112 is in the retracted position, the clamping device 126 and the fluid pressure cylinder device 120 do not interfere with the rotor core holding fixture 10 that is carried in and out in the left and right directions relative to the base 42. Therefore, the rotor core holding fixture 10 is carried in and out of the installation device 40 without interfering with the clamping device 126 and the like.

[0064] Each clamping device 126 is moved in the left-right direction between the most retracted position, the separation position and the engagement position by the fluid pressure cylinder device 120. Figure 5 As shown, when the lifting platform 112 is in the above-mentioned retreat position, each clamping device 126 will not interfere with the base 42. Figure 6 As shown, when the lifting platform 112 is in the above working position, the corresponding connecting rod 30 is separated from the engaging groove 32. In the engaging position, as shown in FIG. Figure 7 As shown, when the lifting platform 112 is in the above working position, the corresponding connecting rod 30 is engaged with the engaging groove 34 and the engaging groove 32 .

[0065] Regarding the installation of the rotor core 2 relative to the rotor core holding fixture 10 using the installation device 40, first, when each lifting platform 112 is in the retracted position, a robot arm (not shown) is used to install the rotor core 2 relative to the rotor core holding fixture 10. Figure 5 As shown in FIG. 4 , the magnet pieces 5 are loaded onto the base 42. Before the loading, the magnet pieces 5 are inserted into the magnet insertion holes 4 of the rotor core 2.

[0066] Next, the lifting platform 112 is raised to the operating position by driving the electric motors 114, and the pressing plate 52 is pressed against the upper plate 14 by driving the pressing device 48. As a result, the upper plate 14 is lowered, and the compression coil springs 28 are compressed and deformed.

[0067] In this state, each clamping device 126 is driven by the fluid pressure cylinder device 120. Figure 6 As shown in the figure, the connecting rod 30 is advanced to the separated position, and each clamping device 126 grasps the connecting rod 30 suspended and supported on the upper plate 14 by driving the electromagnetic actuator 130.

[0068] After the gripping is completed, each clamping device 126 is advanced to the engagement position by driving the fluid pressure cylinder device 120. Thus, each connecting rod 30 is engaged with the engagement groove 34 of the upper plate 14 and the engagement groove 32 of the lower plate 12.

[0069] Thereafter, by releasing the pressing of the upper plate 14 by the pressing plate 52 , the lower plate 12 and the upper plate 14 are connected to each other via the connecting rod 30 in a state where the elastic force of each compression coil spring 28 reaches a predetermined value.

[0070] Thus, the setting of the connecting rod 30 is automated. Figure 3 As shown, the rotor core 2 can be handled together with the rotor core holding jig 10 as a subassembly in which the openings 4B of the magnet insertion holes 4 are closed by the corresponding closing members 26 using the pressing force generated by the elastic force of the compression coil springs 28 .

[0071] After that, each clamping device 126 returns to the most retracted position, each lifting platform 112 descends to the retracted position, and in this state, the rotor core holding jig 10 is carried out from the installation device 40 .

[0072] Reference Fig. 9 Other embodiments of the setting device 40 are described. Fig. 9 In the Figure 5 to Figure 7 The part marked with Figure 5 to Figure 7 The same reference numerals as in the figure are used and their descriptions are omitted.

[0073] In this embodiment, a rotating table 138 is rotatably provided on each bracket 134 mounted on both left and right sides of the base 42 via a pivot 136. On each rotating table 138, a cylinder mounting plate 118 is mounted.

[0074] Thus, each of the clamping devices 126 and the like is moved to the retracted position by the rotation of the rotating table 138 .

[0075] Other aspects Figures 5 to 8 The embodiment shown in FIG. is substantially the same. Therefore, in this embodiment, the same Figures 5 to 8 The same effect is achieved in the embodiment shown.

[0076] Below, refer to Figure 10 to Figure 12 The resin molding device 60 will be described.

[0077] The resin molding device 60 includes: a plurality of column members 62 extending in the vertical direction; a fixed platen 64 fixed to the upper end of the column member 62; and a movable platen 66 that can move up and down guided by the column member 62. The movable platen 66 is driven in the vertical direction by a driving device (not shown) based on fluid pressure or the like, and can approach and move away from the fixed platen 64.

[0078] The lower base member 70 is mounted on the movable platen 66. The lower base member 70 is composed of an assembly in which a lower member 72, an intermediate member 74, and an upper member 76 are overlapped. Fig.10 As shown, in a state where the movable platen 66 is lowered, the assembly of the rotor core 2 and the rotor core holding jig 10 is placed on the upper member 76 .

[0079] A plurality of resin pots 80 corresponding to the magnet insertion holes 4 of the rotor core 2 are formed in the upper part 76. Each resin pot 80 is opened on the upper surface of the upper part 76 and communicates with the corresponding material guide opening 22. A plunger chamber 82 and a push rod chamber 84 communicated with each resin pot 80 are formed in the intermediate part 74. As a resin introduction device for introducing molten resin from the resin pot 80 into the magnet insertion hole 4 via the gate 20, a plunger 86 is provided in the plunger chamber 82 so as to be movable up and down, and a push rod 88 is provided in each push rod chamber 84 so as to be movable up and down. The resin pot 80, the plunger chamber 82 and the material guide opening 22 are holes having the same inner diameter as each other, and the plunger 86 can enter the material guide opening 22 from the plunger chamber 82.

[0080] The resin 6 in a solid state in a block shape is placed on the plunger 86 of each resin tank 80 .

[0081] Each push rod 88 abuts against the corresponding plunger 86 at the upper end, causing the plunger 86 to move upward. Each push rod 88 has a pressure-receiving flange 90 at the lower end, and each pressure-receiving flange 90 is subjected to oil pressure through the working oil of the manifold oil passage 92 formed in the intermediate member 74. A cylinder chamber 94 is formed in the lower member 72. A piston 96 is provided in the cylinder chamber 94 so as to be movable up and down. The piston 96 defines an upper oil chamber 98 connected to the manifold oil passage 92 on the upper side, and defines a lower oil chamber 100 on the lower side. The upper oil chamber 98 and the lower oil chamber 100 are connected to an oil pressure source (not shown) through oil passages 102, 104, etc. formed in the lower member 72.

[0082] A heater 106 for heating the lower base member 70 is embedded in the lower base member 70 .

[0083] An upper side opposing member 108 is mounted below the fixed platen 64. The upper side opposing member 108 is opposed to the lower side base member 70 via the rotor core holding fixture 10 on the lower side base member 70, and the movable platen 66 can approach and move away from the fixed platen 64, thereby being able to relatively approach and move away from the lower side base member 70.

[0084] like Fig.11 As shown, each plate pressing rod 36 abuts against the lower surface of the upper opposing member 108 by the upward movement of the movable pressing plate 66 , and the lower plate 12 is pressed against the lower base member 70 by the pressing force transmitted from the upper opposing member 108 to the lower plate 12 .

[0085] Therefore, in the rotor core holding fixture 10, the force pressing the lower plate 12 toward the lower base component 70 is determined by the upward force (mold clamping force) of the movable pressure plate 66, independently of the force pressing the closing component 26 toward the rotor core 2 by the elastic force of the compression coil spring 28. Under the action of the force pressing the lower plate 12 toward the lower base component 70, the material guide opening 22 and the resin tank 80 are connected without a gap.

[0086] The solid resin 6 in each resin tank 80 is melted by heating by the heater 106 or the like. Fig.12 As shown, oil pressure is supplied from an oil pressure source (not shown) to the lower oil chamber 100, and the piston 96 moves upward, thereby using the working oil in the manifold oil passage 92 as a pressure medium, and the pressure is evenly transmitted to each pressure-receiving flange 90 and the push rod 88. As a result, each plunger 86 moves upward, and the molten resin 6 in each resin tank 80 is pressure-fed and filled into each magnet insertion hole 4 through the corresponding material guide opening 22 and gate 20.

[0087] The force for pressing the lower plate 12 to the lower base member 70 can be independently set to an appropriate value that is not excessive or insufficient due to the upward force of the movable platen 66. Therefore, the material guide opening 22 is connected to the resin pot 80 under the action of an appropriate pressing force for pressing the lower plate 12 to the lower base member 70. Thus, in the process of pressing the molten resin 6 from the resin pot 80 to the magnet insertion hole 4, the molten resin 6 is prevented from leaking to the outside from the boundary portion between the lower plate 12 and the lower base member 70, and the generation of burrs at the boundary portion is prevented.

[0088] Since the closing member 26 is pressed against the rotor core 2 by the elastic force of the compression coil spring 28 independently of the upward force of the movable platen 66, the force for pressing the closing member 26 against the rotor core 2 can be set independently to an appropriate value that is neither too large nor too small, independently of the force for pressing the lower plate 12 against the lower base member 70. Thus, the rotor core 2 does not deform, such as warping, and the closing of the opening 4B of the magnet insertion hole 4 and the connection of the opening 4A of the magnet insertion hole 4 with the gate 20 are performed under the action of an appropriate pressing force of the force for pressing the closing member 26 against the rotor core 2. Thus, in the process of press-feeding the molten resin 6 from the resin pot 80 to the magnet insertion hole 4, the molten resin 6 is prevented from leaking to the outside from the opening 4B of the magnet insertion hole 4 or from leaking to the outside from the boundary portion between the opening 4A of the magnet insertion hole 4 and the gate 20, and the generation of burrs around the boundary portion or the opening 4B is prevented.

[0089] As mentioned above, although this invention was demonstrated based on the specific embodiment, these embodiments are only examples, and this invention is not limited to these embodiments.

[0090] For example, a mechanism for moving the clamping device 126 to the retreat position is not essential. The engaging grooves 32 and 34 may be provided as engaging grooves that are opened at the outer edges of the lower plate 12 and the upper plate 14, in addition to being opened at the left and right outer edges of the lower plate 12 and the upper plate 14. In this case, the clamping device 126 and the like are provided corresponding to the left and right sides and the front and rear sides of the lower plate 12 and the upper plate 14, respectively, and the clamping device 126 corresponding to at least one side of the lower plate 12 and the upper plate 14 is configured to be movable to the retreat position so that the rotor core holding fixture 10 can be moved into or out of the setting device 40. The resin molding device 60 may also be configured to be flipped upside down.

[0091] In addition, all the components of the method for manufacturing a magnet-embedded core of the present invention shown in the above-mentioned embodiment are not necessarily all essential, and can be appropriately selected or discarded within a range that at least does not depart from the gist of the present invention.

[0092] Description of symbols

[0093] 1: Magnet embedded core;

[0094] 2: rotor core;

[0095] 2A: lower end surface;

[0096] 2B: upper end face (one end face);

[0097] 3: shaft hole;

[0098] 4: Magnet insertion hole;

[0099] 4A: Open (one opening);

[0100] 4B: Opening (another opening);

[0101] 5: Magnet sheet;

[0102] 10: Rotor core holding fixture;

[0103] 12: Lower plate (first plate);

[0104] 12A: upper surface;

[0105] 14: Upper board (second board);

[0106] 14A: Bolt through hole

[0107] 15: Protruding part

[0108] 20: Gate;

[0109] 22: material guide opening;

[0110] 24: bolt;

[0111] 24A: head;

[0112] 26: Closing parts;

[0113] 26A: lower surface;

[0114] 28: Compression coil spring;

[0115] 30: connecting rod;

[0116] 30A: rod-shaped part;

[0117] 30B: flange portion;

[0118] 30C: flange portion;

[0119] 32: snap-fit ​​slot;

[0120] 32A: groove;

[0121] 32B: Open;

[0122] 32C: Shoulder;

[0123] 34: snap-fit ​​slot;

[0124] 34A: groove;

[0125] 34B: Open;

[0126] 34C: Shoulder;

[0127] 36: Plate pressure bar;

[0128] 38: through hole;

[0129] 40: Setting device;

[0130] 42: Abutment;

[0131] 44: column component;

[0132] 46: Opposing table;

[0133] 48: pressurizing device;

[0134] 50: piston rod;

[0135] 52: pressure plate;

[0136] 60: resin molding device;

[0137] 62: column component;

[0138] 64: fixed pressure plate;

[0139] 66: movable pressure plate;

[0140] 70: lower base member;

[0141] 72: lower part;

[0142] 74: middle part;

[0143] 76: upper part;

[0144] 80: resin tank;

[0145] 82: plunger chamber;

[0146] 84: Putting room;

[0147] 86: plunger;

[0148] 88: Putting;

[0149] 90: pressure flange;

[0150] 92: Manifold oil circuit;

[0151] 94: Cylinder room;

[0152] 96: Piston;

[0153] 98: upper oil chamber;

[0154] 100: lower oil chamber;

[0155] 102: Oil circuit;

[0156] 104: Oil circuit;

[0157] 106: heater;

[0158] 108: upper side opposing component;

[0159] 110: guide rail;

[0160] 112: Lifting platform;

[0161] 114: Electric motor;

[0162] 116: feed screw;

[0163] 118: cylinder mounting plate;

[0164] 120: Fluid pressure cylinder device (driving device);

[0165] 122: piston rod;

[0166] 124: clamping device mounting plate;

[0167] 126: clamping device;

[0168] 128: fixing the card clip;

[0169] 130: electromagnetic actuator;

[0170] 132: movable card clip;

[0171] 134: bracket;

[0172] 136: Pivot;

[0173] 138: Turntable.

Claims

1. A device for installing a rotor core holding fixture, the rotor core holding fixture comprising: a first plate and a second plate facing each other; and a connecting rod, which is engaged with a cutout-shaped engaging groove opened on the periphery of the first plate and the second plate, so that the flanges at both ends abut against the first plate and the second plate respectively, thereby connecting the first plate and the second plate to each other, and arranging a rotor core between the first plate and the second plate, The device for setting the rotor core holding fixture comprises: A base on which the rotor core holding fixture is placed; an opposing table, which is combined with the base table and is opposed to the base table; a pressurizing device mounted on the opposing table and pressurizing the second plate of the rotor core holding fixture on the base toward the first plate; a clamping device mounted on the base, holding each connecting rod and being movable between a separation position where the connecting rod is separated from the engaging groove and an engagement position where the connecting rod is engaged with the engaging groove; and The driving device is provided on the base and drives each clamping device between the separation position and the engagement position.

2. The setting device according to claim 1, wherein: The rotor core includes magnet insertion holes having openings at both end surfaces in the axial direction. The first plate includes a gate communicating with an opening of the magnet insertion hole, The rotor core holding fixture further includes a closing member connected to the second plate via a compression spring member and abutting against one of the two end faces of the rotor core to close the other opening of the magnet insertion hole. The connecting rod has an axial length for connecting the first plate and the second plate to each other so that the elastic force of the compression spring member becomes a predetermined value in a state where the closing member closes the opening.

3. The setting device according to claim 1 or 2, wherein: The first plate and the second plate are respectively rectangular and have the engaging grooves corresponding to at least two sides parallel to each other. The clamping devices are provided so as to correspond to at least the two sides of the first plate and the second plate of the rotor core holding jig placed on the base, respectively.

4. The setting device according to claim 1 or 2, wherein: The clamping device can be moved to a working position and a retreat position, the working position is located at a position corresponding to the position between the base and the opposing table, in the working position, the clamping device can be moved between the departure position and the engagement position, and in the retreat position, the clamping device will not interfere with the rotor core holding fixture that is moved in and out relative to the base.

5. The setting device according to claim 1 or 2, wherein: The base and the opposing platform are opposed to each other with a gap therebetween in the up-down direction, and the second plate located on the upper side has a larger outer profile than the first plate located on the lower side. When the connecting rod is not gripped by the clamp device, the connecting rod is engaged with only the engagement groove of the second plate and is supported by the second plate in a suspended state.

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