JP2011160510A - Shrinkage fitting device, shrinkage fitting method, and shrinkage fitting sintered compact - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shrinkage fitting method of precisely performing shrinkage fitting to a frame at low cost with a plurality of divided cores being divided. <P>SOLUTION: An outside-diameter holding nib 20 and an inside-diameter holding nib 22 hold the plurality of divided cores 5, and the outside-diameter holding nib 20 secedes from an outer peripheral surface 5a of the plurality of divided cores 5 while an inner peripheral surface 6a of the frame 6 guides the outer peripheral surface 5a of the plurality of divided cores 5 along with the descending frame 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a shrink-fitting device, a shrink-fitting method, and a shrink-fitting fastening body between a stator of a motor and a frame in which the stator is fixed to the inner diameter portion or inside thereof.

  Conventionally, as a shrink-fit method and a shrink-fit fastening body of this type of stator and frame, there is one disclosed in Patent Document 1. This is formed by laminating electromagnetic steel sheets having a substantially T-shaped cross section perpendicular to the axis of the motor to form a split core, and by winding a coil around a magnetic leg portion corresponding to a T-shaped vertical bar, After the T-shaped horizontal bars of the split cores are brought into close contact with each other to form a cylindrical shape, the contact portions of the stator yoke corresponding to the T-shaped horizontal bars are bead-welded to form an integrated stator, which is shrink-fitted to the frame and shrink-fitted. A fastener is manufactured.

JP 2007-161158 A

  However, the stator (multiple divided cores) and frame shrink-fitting method and shrink-fitted fasteners shown in Patent Document 1 are divided into conventional cores to form divided cores, and the maximum winding occupation is achieved. Despite the fact that the volume factor is obtained, the close contact portions of the plurality of stator yokes are integrated by bead welding. That is, the joint of the stator yoke having the total extension represented by the product of the number of divided cores and the axial length of the divided cores must be joined by high-cost bead welding, which is a very expensive stator. As a result, there has been a problem that the shrink-fitted joint between the stator and the frame becomes very expensive.

  In view of the above-mentioned problems, the problem of the present invention is that the split core around which the coil is wound is shrink-fitted to the frame while being split without going through the process of being integrated by welding, adhesion, etc. It is to provide a shrink fitting device and a shrink fitting method.

  In order to solve the above-mentioned problem, the invention of claim 1 includes a first plate member that is placed on a horizontal plane and forms a base of the entire apparatus, and a plurality of first guide members that are erected on the first plate member. A columnar member having a first column erecting on the first plate member and a second column erecting on an upper end surface of the first column, and the first guide member slidable in the vertical direction A second plate member guided by the first plate member, a plurality of second guide members erected on the first plate member, and a tapered inner hole whose diameter is reduced downward in the vertical direction and slidable in the vertical direction Between the first plate member and the ring member, and a ring member that is guided by the second guide member and is restricted from sliding vertically upward by a restricting member fixed to the upper end of the second guide member. Intervening A first urging member that urges the ring member upward in the vertical direction, a taper portion that engages with the tapered inner hole of the ring member, and an upper end surface that contacts the restriction member and extends downward in the vertical direction. It has an inner hole and a tapered inner hole that expands downward in the vertical direction from the lower end of the inner hole, and is divided at an equal angle on a horizontal plane by a plurality of vertical planes passing through the axial center, and the divided surfaces are close to each other An outer diameter holding claw inserted into the tapered inner hole of the ring member in a state, a cylindrical portion having a guide hole into which the columnar member is inserted, and the outer diameter holding claw formed above the cylindrical portion. A cylindrical guide member having a guide portion that is slidably guided in a radial direction, and a plurality of second urging forces with a plurality of vertical planes passing through the axis and being divided at equal angles on a horizontal plane and in a state where the divided surfaces are close to each other Through the member A cylindrical hollow frame that has a split hollow cylindrical inner diameter holding claw that is attached to the second columnar member so as to expand in the radial direction, opens downward in the vertical direction, and is heated to a predetermined temperature. A plurality of split cores that are suspended from the plate member, the coil is wound, and the stator as a whole are disposed concentrically with both claws between the outer diameter holding claws and the inner diameter holding claws, When the two plate members are lowered downward by a predetermined distance, a rod member provided on the second plate member slides the ring member downward in the vertical direction, and the plurality of divided cores are fitted into the frame by predetermined dimensions. Further, when the ring member slides downward in the vertical direction, the outer diameter holding claw slides in the radial direction and detaches from the lower end surfaces of the plurality of split cores, thereby This is a shrink fitting device in which the split core is immersed in the frame.

  According to a second aspect of the present invention, there is provided a first plate member that is placed on a horizontal plane to form a base of the entire apparatus, a plurality of first guide members that are erected on the first plate member, and the first A cylindrical member standing on the plate member, a second plate member guided by the first guide member so as to be slidable in the vertical direction, and a plurality of second guide members standing on the first plate member And a vertically extending upper portion by a restricting member that is guided by the second guide member so as to be slidable in the vertical direction and fixed to the upper end of the second guide member. A ring member that is restricted from sliding on the first member, a first urging member that is interposed between the first plate member and the ring member and urges the ring upward in a vertical direction, and the ring member Te A tapered portion that engages with the inner hole, an inner hole that extends vertically downward from an upper end surface with which the restricting member abuts, and a tapered inner hole that expands downward in the vertical direction from the lower end of the inner hole. An outer diameter holding claw that is divided at an equal angle on a horizontal plane by a plurality of vertical planes that pass through the shaft center and that is fitted into the tapered inner hole of the ring member in a state where the divided surfaces are close to each other, and the cylindrical member A cylindrical guide member having a cylindrical portion having a guide hole into which the guide member is inserted, and a guide portion formed at an upper end of the cylindrical portion to guide the outer diameter holding claw so as to be slidable in a radial direction; A holding shaft that is slidably held in a vertical direction by a drive member that extends in the axial direction of the cylindrical member, a restricting portion that is provided at a lower end of the holding shaft and has a larger radial dimension than the holding shaft, and the holding shaft On the upper edge of And a stepped taper shaft member having a taper shaft that expands upward in the vertical direction, and is interposed between the drive member and the step taper shaft member to vertically extend the step taper shaft member. A second urging member that urges upward in the direction and a tapered inner hole that decreases in the vertical direction downward, and is divided at equal angles on the horizontal plane by a plurality of vertical planes that pass through the axial center Is provided with an inner diameter holding claw that engages with the taper shaft in a state of being close to each other, and a cylindrical frame that opens downward in the vertical direction and is heated to a predetermined temperature is suspended from the second plate member, so that the coil is wound. And a plurality of divided cores constituting the stator as a whole are disposed concentrically with the claws between the outer diameter holding claws and the inner diameter holding claws, and the second plate member moves vertically downward by a predetermined distance. Slide forward A rod member provided on the second plate member slides the ring member downward in the vertical direction, the plurality of split cores are fitted into the frame with predetermined dimensions, and the driving member abuts against the restricting portion. The inner diameter holding claw and the stepped taper shaft member slide the inner peripheral portion of the stator downward in the vertical direction against the biasing force of the second biasing member, and the ring member further in the vertical downward direction. As the ring member slides downward in the vertical direction, the outer diameter holding claws slide in the radial direction while detaching from the lower end surfaces of the plurality of split cores, and the plurality of split cores are immersed in the frame. This is a shrink fitting device.

  According to a third aspect of the present invention, there is provided a first plate member that is placed on a horizontal plane to form a base of the entire apparatus, a plurality of first guide members that are erected on the first plate member, and the first plate member. A columnar member having a first column standing upright and a second column standing upright on the upper end surface of the first column, and a second plate guided by the first guide member slidably in the vertical direction A member, a plurality of second guide members erected on the first plate member, and a tapered inner hole whose diameter is reduced downward in the vertical direction and slidable in the vertical direction to the second guide member A ring member that is guided and regulated to slide upward in the vertical direction by a regulating member fixed to the upper end of the second guide member, and is interposed between the first plate member and the ring member, and the ring Hanging a member A first urging member that urges upward in the direction, a tapered portion that engages with the tapered inner hole of the ring member, an inner hole that extends vertically downward from an upper end surface with which the restricting member abuts, and the inner hole The ring member is divided into equal angles on a horizontal plane by a plurality of vertical planes having a tapered inner hole whose diameter expands downward from the lower end in the vertical direction and passes through the axial center, and in the state where the division planes are close to each other. An outer diameter holding claw inserted into the tapered inner hole, a cylindrical part having a guide hole into which the columnar member is inserted, and a guide formed so as to be slidable in the radial direction in the radial direction. And a cylindrical guide member having a guide portion that is divided into a uniform angle on a horizontal plane by a plurality of vertical planes passing through the axis and in a radial direction via a plurality of second urging members in a state in which the division surfaces are close to each other To expand the diameter A split hollow cylindrical inner diameter holding claw attached to the second columnar member, and a cylindrical frame that opens downward in the vertical direction and is heated to a predetermined temperature is suspended from the second plate member; A plurality of divided cores that are wound and constitute a stator as a whole are disposed concentrically with both claws between the outer diameter holding claws and the inner diameter holding claws, and the second plate member is moved downward in the vertical direction. When lowered by a predetermined distance, the rod member provided on the second plate member slides the ring member downward in the vertical direction, the plurality of divided cores are inserted into the frame by a predetermined size, and the ring member is further moved in the vertical direction. When sliding downward, the outer diameter retaining claws slide away from the lower end surfaces of the plurality of split cores while sliding in the radial direction, so that the plurality of split cores are within the frame. It is an immersive shrink fitting method.

  According to a fourth aspect of the present invention, there is provided a first plate member that is placed on a horizontal plane and forms a base of the entire apparatus, a plurality of first guide members that are erected on the first plate member, and the first A cylindrical member standing on the plate member, a second plate member guided by the first guide member so as to be slidable in the vertical direction, and a plurality of second guide members standing on the first plate member And a vertically extending upper portion by a restricting member that is guided by the second guide member so as to be slidable in the vertical direction and fixed to the upper end of the second guide member. A ring member that is restricted from sliding on the first member, a first urging member that is interposed between the first plate member and the ring member and urges the ring upward in a vertical direction, and the ring member Te A tapered portion that engages with the inner hole, an inner hole that extends vertically downward from an upper end surface with which the restricting member abuts, and a tapered inner hole that expands downward in the vertical direction from the lower end of the inner hole. An outer diameter holding claw that is divided at an equal angle on a horizontal plane by a plurality of vertical planes that pass through the shaft center and that is fitted into the tapered inner hole of the ring member in a state where the divided surfaces are close to each other, and the cylindrical member A cylindrical guide member having a cylindrical portion having a guide hole into which the guide member is inserted, and a guide portion formed at an upper end of the cylindrical portion to guide the outer diameter holding claw so as to be slidable in a radial direction; A holding shaft that is slidably held in a vertical direction by a drive member that extends in the axial direction of the cylindrical member, a restricting portion that is provided at a lower end of the holding shaft and has a larger radial dimension than the holding shaft, and the holding shaft On the upper edge of And a stepped taper shaft member having a taper shaft that expands upward in the vertical direction, and is interposed between the drive member and the step taper shaft member to vertically extend the step taper shaft member. A second urging member that urges upward in the direction and a tapered inner hole that decreases in the vertical direction downward, and is divided at equal angles on the horizontal plane by a plurality of vertical planes that pass through the axial center Is provided with an inner diameter holding claw that engages with the taper shaft in a state of being close to each other, and a cylindrical frame that opens downward in the vertical direction and is heated to a predetermined temperature is suspended from the second plate member, so that the coil is wound. And a plurality of divided cores constituting the stator as a whole are disposed concentrically with the claws between the outer diameter holding claws and the inner diameter holding claws, and the second plate member moves vertically downward by a predetermined distance. Slide forward A rod member provided on the second plate member slides the ring member downward in the vertical direction, the plurality of split cores are fitted into the frame with predetermined dimensions, and the driving member abuts against the restricting portion. The inner diameter holding claw and the stepped taper shaft member slide the inner peripheral portion of the stator downward in the vertical direction against the biasing force of the second biasing member, and the ring member further in the vertical downward direction. As the ring member slides downward in the vertical direction, the outer diameter holding claws slide in the radial direction while detaching from the lower end surfaces of the plurality of split cores, and the plurality of split cores are immersed in the frame. This is a shrink fitting method.

  In addition, the invention of claim 5 is a shrink-fitted fastener of the plurality of divided cores and the frame manufactured by the method of claim 3 or claim 4.

  According to the invention of claim 1, before the rod member presses the ring member and the binding force of the outer diameter holding claw is lost, the frame inner diameter portion finishes the predetermined distance insertion into the plurality of divided cores. Thus, it is possible to provide a shrink-fitting device in which the outer diameter of the cylinder formed by the divided cores always follows the inner diameter of the frame, and the plurality of divided cores are shrink-fitted with the frame with high accuracy and low cost.

  According to the second aspect of the present invention, since the inner diameter portion of the frame has finished the predetermined distance insertion into the plurality of divided cores before the rod member presses the ring member and the binding force of the outer diameter holding claw is lost, a plurality of The outer diameter of the cylinder formed by the split core always follows the inner diameter of the frame, and the drive member adjusts the expansion force of the inner diameter holding claw so that the frame can be held without contacting the outer diameter holding claw. The nail is released in the downward direction. For this reason, it is possible to provide a shrink-fitting device in which a plurality of divided cores are shrink-fitted with a frame with high accuracy and low cost.

  According to the third aspect of the present invention, since the inner diameter portion of the frame has finished the predetermined distance insertion into the plurality of divided cores before the rod member presses the ring member and the binding force of the outer diameter holding claw is eliminated, It is possible to provide a shrink fitting method in which the outer diameter of the cylinder formed by the divided cores always follows the inner diameter of the frame, and the plurality of divided cores are shrink fitted with the frame with high accuracy and low cost.

  According to the fourth aspect of the present invention, since the inner diameter portion of the frame has finished the predetermined distance insertion into the plurality of divided cores before the rod member presses the ring member and the binding force of the outer diameter holding claws disappears, The outer diameter of the cylinder formed by the split core always follows the inner diameter of the frame, and the drive member adjusts the expansion force of the inner diameter holding claw so that the frame can be held without contacting the outer diameter holding claw. The nail is released in the downward direction. For this reason, it is possible to provide a shrink fitting method in which a plurality of divided cores are shrink fitted with a frame with high accuracy at low cost.

  According to the invention of claim 5, since the plurality of split cores and the frame are shrink-fitted by the method of claim 3 or claim 4, a low-cost shrink-fitted fastener can be provided.

It is sectional drawing of the shrink-fitting apparatus used for 1st Embodiment of this invention. It is a top view of the ring member used for 1st Embodiment and 2nd Embodiment of this invention. It is sectional drawing of the ring member used for 1st Embodiment and 2nd Embodiment of this invention. It is a top view of the outer diameter holding | maintenance nail | claw used for 1st Embodiment and 2nd Embodiment of this invention. It is sectional drawing of the outer diameter holding | maintenance nail | claw used for 1st Embodiment and 2nd Embodiment of this invention. It is a side view of the outer diameter holding | maintenance nail | claw used for 1st Embodiment and 2nd Embodiment of this invention. It is a top view of the cylindrical guide member used for 1st Embodiment and 2nd Embodiment of this invention. It is sectional drawing of the cylindrical guide member used for 1st Embodiment and 2nd Embodiment of this invention. It is sectional drawing of the shrink-fitting apparatus used for 2nd Embodiment of this invention.

  Hereinafter, a shrink-fitting method and a shrink-fitting fastener according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 shows a shrink-fitting device according to the first embodiment.

  As shown in FIG. 1, two thin cylindrical first guide members 12 are erected and fixed near both ends on a plate-like first plate member 11 placed on a horizontal plane.

  A first cylinder 14 is erected and fixed at the center of the first plate member 11, and a second cylinder 15 is fixed to the upper end surface 14 a of the first cylinder 14 coaxially with the first cylinder 14. Yes. Two springs (second biasing members) 52 are arranged at four positions on the circumference of the second cylinder 15 at 90 ° intervals to bias the four inner diameter holding claws 22 radially outward. .

  The inner diameter holding claw 22 has a tile shape in which a hollow cylinder is equally divided into four by four vertical planes intersecting at its axis.

  A second plate member 18 is disposed at the upper end of the first guide member 12 so as to be slidable in the vertical direction. The second plate member 18 is connected to a press machine or the like and slides up and down. A cylindrical frame 6 made of an aluminum alloy that is heated to a predetermined temperature (about 270 ° C. in the present embodiment) is suspended from the center of the second plate member 18. A spring may be interposed between the first plate member 11 and the second plate member 18 to assist the upward sliding of the second plate member 18 in the vertical direction.

  Four thin cylindrical second guide members 16 are erected and fixed on the first plate member 11 symmetrically about the axis of the first column 14. A ring member 17 is guided by the second guide member 16 so as to be slidable in the vertical direction. The ring member 17 is urged upward in the vertical direction by a spring 51 (first urging member) interposed between the first plate member 11 and the ring member 17, but above the second guide member 16. The amount of sliding upward in the vertical direction is regulated by the regulating member 16a fixed to the end via an outer diameter holding claw 20 described later.

  As shown in FIGS. 2 and 3, the ring member 17 is a hollow disk having four guide holes 17 a guided by the second guide member 16. A ring-shaped protrusion 17e having a tapered inner hole 17d whose diameter is reduced downward in the vertical direction is integrally formed on an inner peripheral surface 17c near the upper end surface 17b. Match.

  As shown in FIGS. 1, 4, 5, and 6, the outer diameter holding claws 20 are equally 4 on four vertical planes that intersect a hollow frustum whose diameter is reduced downward in the vertical direction. The shape is split. A tapered surface 20a that engages with the tapered inner hole 17d of the ring member 17 is formed on the outer peripheral portion. Further, an inner hole 20b that fits with the outer peripheral portions of the plurality of split cores 5 is formed in the inner peripheral portion from the upper end surface 20c downward in the vertical direction. Further, a tapered inner hole 20d is formed which continuously expands from the lower end of the inner hole 20b. When the tapered surface 20a is wedge-engaged with the tapered inner hole 17d of the ring member 17, a gap is formed between the adjacent divided surfaces 20e. An inverted T-shaped protrusion 20 f is formed at the lower end of each outer diameter holding claw 20.

  The upper end surface 20 c of the outer diameter holding claw 20 contacts the regulating member 16 a fixed to the upper end portion of the second guide member 16, and the tapered surface 20 a of the outer diameter holding claw 20 is in contact with the tapered inner hole 17 d of the ring member 17. Since the ring member 17 is engaged, the amount of sliding of the ring member 17 upward in the vertical direction is indirectly regulated through the outer diameter holding claw 20.

  As shown in FIGS. 1, 7, and 8, a cylindrical guide member 21 having a hooked cylindrical shape is disposed on the lower side in the vertical direction of the outer diameter holding claw 20. An inverted T-shaped protrusion 20f of the outer diameter holding claw 20 is fitted into the flange portion 21a at the upper end of the cylindrical guide member 21, and a T groove for holding the outer diameter holding claw 20 slidably in the radial direction. 21b (holding portions) are formed at four intervals on the circumference at 90 ° intervals. A cylindrical portion 21 d having a guide hole 21 c is formed continuously below the T-groove 21 b in the vertical direction, and the guide hole 21 c is fitted to the outer peripheral portion 14 b of the first column 14.

  Below, the process of the shrink-fitting method of 1st Embodiment is demonstrated.

  As shown in FIG. 1, a cylindrical frame 6 made of an aluminum alloy that is heated to a predetermined temperature (about 270 ° C. in the present embodiment) is suspended from the center of the second plate member 18. At the same time, the plurality of split cores 5 held by the inner diameter holding claws 22 urged radially outward by the spring 52 and held by the outer diameter holding claws 20 are placed on the upper end surface 14 a of the first column 14. ing.

  When the second plate member 18 is lowered, first, the inner peripheral surface 6a of the frame 6 is fitted into the outer peripheral surface 5a of the cylindrical portion formed by the plurality of divided cores 5 by a predetermined dimension. In this state, the plurality of divided cores 5 are guided by the inner peripheral surface 6 a of the frame 6, and no positional deviation occurs between the plurality of divided cores 5 and the frame 6.

  When the second plate member 18 is further lowered, the rod member 42 provided on the second plate member 18 comes into contact with the upper end surface 17b of the ring member 17, and the ring member 17 is resisted against the urging force of the spring 51. Press down. As the ring member 17 slides downward, the outer diameter holding claw 20 slides downward.

  When the lower end portion 20d1 of the tapered inner hole 20d of the outer diameter holding claw 20 reaches the upper side portion 14c of the first column 14 and further descends, the cam action of the tapered inner hole 20d and the upper side portion 14c causes the outer diameter. The holding claw 20 slides with respect to the cylindrical guide member 21 so as to be spread outward in the radial direction.

  When the second plate member 18 is further lowered, the inner hole 20b of the outer diameter holding claw 20 is fitted into the guide surface 14b of the first column 14, and the outer peripheral surface 5a of the cylindrical portion formed by the plurality of divided cores 5 is used. Leave. In this state, the plurality of divided cores 5 are guided by the inner peripheral surface of the frame 6, and no positional deviation occurs between the plurality of divided cores 5 and the frame 6.

  When the second plate member 18 is further lowered, the plurality of divided cores 5 completely enter the frame 6.

  When the second plate member 18 is stopped and held for a predetermined time in a state where the outer diameter holding claw 20 is completely detached from the outer peripheral surface 5a of the cylindrical portion formed by the plurality of divided cores 5, the aluminum alloy frame 6 is naturally cooled. After shrinking and a predetermined time has elapsed, the shrink-fitting between the plurality of split cores 5 and the frame 6 is completed.

  When the second plate member 18 is lifted after completion of shrink fitting, the frictional engagement force between the inner peripheral surfaces 5b of the plurality of divided cores 5 and the inner diameter holding claws 22 is the shrink fitting engagement force between the plurality of divided cores 5 and the frame 6. Since it is much smaller, the plurality of split cores 5 and the frame 6 are detached from the inner diameter holding claw 22 while being integrated, the second plate member 18 returns to the initial state of FIG. 1, and the shrink-fitting operation is completed.

  According to the first embodiment, the plurality of divided cores 5 are held by the outer diameter holding claws 20 and the inner diameter holding claws 22, and the inner peripheral surface 6 a of the frame 6 is formed of the plurality of divided cores 5 as the frame 6 descends. Since the outer diameter holding claws 20 are separated from the outer peripheral surfaces 5a of the plurality of divided cores 5 while guiding the outer peripheral surface 5a, it is not necessary to previously integrate the plurality of divided cores 5 by welding or bonding. With the divided core 5 being divided, shrink fitting can be performed at low cost with high accuracy.

  Next, a second embodiment will be described with reference to FIG. 9, components having the same shape and function as those in the first embodiment are denoted by the same reference numerals as those in FIG. 1, and description thereof is omitted.

  In the second embodiment, a holding shaft 115a that is slidably held in a vertical direction by a drive member 117f that extends in the axial direction of the cylindrical member 114 from the ring member 117 and a lower end of the holding shaft 115a are provided and held. A stepped taper shaft member 115 having a restricting portion 115b having a larger radial dimension than the shaft 115a and a taper shaft 115c provided at the upper end of the holding shaft 115a and expanding in the vertical direction upward is provided. The tapered inner hole 122a of 122 and the taper shaft 115c are wedge-engaged.

  A spring 152 is interposed between the stepped taper shaft member 115 and the drive member 117f, and urges the stepped taper shaft member 115 vertically upward with respect to the drive member 117f.

  Below, the process of the shrink-fitting method of 2nd Embodiment is demonstrated.

  As shown in FIG. 9, a cylindrical frame 6 made of an aluminum alloy heated to a predetermined temperature (about 270 ° C. in the present embodiment) is suspended from the center of the second plate member 18. At the same time, the plurality of split cores 5 held by the inner diameter holding claws 122 engaged with the taper shaft 115 c of the stepped taper shaft member 115 and held by the outer diameter holding claws 20 are mounted on the upper end surface 114 a of the cylindrical member 114. Is placed.

  When the second plate member 18 is lowered, first, the inner peripheral surface 6a of the frame 6 is fitted into the outer peripheral surface 5a of the cylindrical portion formed by the plurality of divided cores 5 by a predetermined dimension. In this state, the plurality of divided cores 5 are guided by the inner peripheral surface 6 a of the frame 6, and no positional deviation occurs between the plurality of divided cores 5 and the frame 6.

  When the second plate member 18 is further lowered, the rod member 42 provided on the second plate member 18 abuts on the upper end surface 117b of the ring member 117, and the ring member 117 is resisted against the biasing force of the spring 51. Press down. As the ring member 117 slides downward, the outer diameter holding claw 20 slides downward, and the drive member 117f contacts the restricting portion 115b of the stepped taper shaft member 115 to hold the inner diameter of the stepped taper shaft member 115. The outer peripheral surface 122b of the inner diameter holding claw 122 descends while sliding with the inner peripheral surfaces 5b of the plurality of split cores 5 while the claw 122 is wedge-engaged.

  When the lower end 20d1 of the tapered inner hole 20d of the outer diameter holding claw 20 reaches the upper side 114a of the cylindrical member 114 and further descends, the outer diameter is maintained by the cam action of the tapered inner hole 20d and the upper side 114a. The claw 20 slides with respect to the cylindrical guide member 21 so as to be spread outward in the radial direction.

  When the second plate member 18 is further lowered, the inner hole 20b of the outer diameter holding claw 20 fits into the guide surface 114b of the cylindrical member 114 and from the outer peripheral surface 5a of the cylindrical portion formed by the plurality of divided cores 5. break away. In this state, the plurality of divided cores 5 are guided by the inner peripheral surface of the frame 6, and no positional deviation occurs between the plurality of divided cores 5 and the frame 6.

  When the second plate member 18 is stopped and held for a predetermined time in a state where the outer diameter holding claw 20 is completely detached from the outer peripheral surface 5a of the cylindrical portion formed by the plurality of divided cores 5, the aluminum alloy frame 6 is naturally cooled. After shrinking and a predetermined time has elapsed, the shrink-fitting between the plurality of split cores 5 and the frame 6 is completed.

  When the second plate member 18 is raised after the shrink fitting is completed, the frictional engagement force between the inner peripheral surfaces 5b of the plurality of divided cores 5 and the inner diameter holding claws 122 is the shrink fitting engagement force between the plurality of divided cores 5 and the frame 6. Since it is much smaller, the plurality of split cores 5 and the frame 6 are detached from the inner diameter holding claw 122 while being integrated, the second plate member 18 returns to the initial state of FIG. 9, and the shrink fitting operation is completed.

  According to the second embodiment, the plurality of divided cores 5 are held by the outer diameter holding claws 20 and the inner diameter holding claws 122, and the inner peripheral surface 6 a of the frame 6 is formed of the plurality of divided cores 5 as the frame 6 descends. Since the outer diameter holding claws 20 are separated from the outer peripheral surfaces 5a of the plurality of divided cores 5 while guiding the outer peripheral surface 5a, it is not necessary to previously integrate the plurality of divided cores 5 by welding or bonding. With the divided core 5 being divided, shrink fitting can be performed at low cost with high accuracy.

5 divided core 6 frame 11 first plate member 12 first guide member 13 column member 14 first column 15 second column 17, 117 ring member 17d, 117d tapered inner hole 18 second plate member 19 second guide member 19a regulation Member 20 Outer diameter holding claw 21 Cylindrical guide member 22, 122 Inner diameter holding claw 42 Rod member 51 Spring (first biasing member)
52, 152 Spring (second biasing member)
114 Cylindrical member 115 Stepped taper shaft member 117f Driving member

Claims (5)

  A first plate member that is placed on a horizontal surface and forms a base of the entire apparatus, a plurality of first guide members that are erected on the first plate member, and a first plate that is erected on the first plate member A column member having one column and a second column standing on an upper end surface of the first column, a second plate member guided by the first guide member to be slidable in a vertical direction, and the first plate A plurality of second guide members erected on the member, and a tapered inner hole having a diameter reduced in the vertical direction and guided by the second guide member so as to be slidable in the vertical direction; A ring member that is controlled to slide upward in the vertical direction by a restriction member fixed to the upper end of the ring, and is interposed between the first plate member and the ring member to attach the ring member upward in the vertical direction. Force A first urging member, a tapered portion that engages with the tapered inner hole of the ring member, an inner hole that extends vertically downward from an upper end surface with which the restricting member abuts, and a vertically lower side from the lower end of the inner hole A plurality of vertical planes passing through the axial center and having a tapered inner hole that expands in diameter, and is divided into equal angles on a horizontal plane and fitted into the tapered inner hole of the ring member in a state where the divided surfaces are close to each other. An outer diameter holding claw, a cylindrical portion having a guide hole into which the columnar member is inserted, and a guide portion formed above the cylindrical portion to guide the outer diameter holding claw so as to be slidable in the radial direction. The cylindrical guide member and the plurality of vertical planes passing through the axial center are divided at equal angles on the horizontal plane, and the diameter is expanded in the radial direction via the plurality of second urging members in a state where the division surfaces are close to each other. Second cylindrical member A split hollow cylindrical inner diameter holding claw to be mounted; a cylindrical frame that opens downward in the vertical direction and is heated to a predetermined temperature is suspended from the second plate member; When the plurality of split cores constituting the stator are disposed concentrically with both claws between the outer diameter holding claws and the inner diameter holding claws, and when the second plate member descends a predetermined distance downward, When the rod member provided on the second plate member slides the ring member downward in the vertical direction, the plurality of split cores are fitted into the frame with a predetermined size, and when the ring member slides downward in the vertical direction, The outer diameter holding claws slide away in the radial direction from the lower end surfaces of the plurality of divided cores, and the plurality of divided cores are immersed in the frame. Shrink fitting device.   A first plate member that is placed on a horizontal surface and forms a base of the entire apparatus, a plurality of first guide members that are erected on the first plate member, and a first plate that is erected on the first plate member A column member having one column and a second column standing on an upper end surface of the first column, a second plate member guided by the first guide member to be slidable in a vertical direction, and the first plate A plurality of second guide members erected on the member, and a tapered inner hole having a diameter reduced in the vertical direction and guided by the second guide member so as to be slidable in the vertical direction; A ring member that is controlled to slide upward in the vertical direction by a restriction member fixed to the upper end of the ring, and is interposed between the first plate member and the ring member to attach the ring member upward in the vertical direction. Force A first urging member, a tapered portion that engages with the tapered inner hole of the ring member, an inner hole that extends vertically downward from an upper end surface with which the restricting member abuts, and a vertically lower side from the lower end of the inner hole A plurality of vertical planes passing through the axial center and having a tapered inner hole that expands in diameter, and is divided into equal angles on a horizontal plane and fitted into the tapered inner hole of the ring member in a state where the divided surfaces are close to each other. An outer diameter holding claw, a cylindrical portion having a guide hole into which the columnar member is inserted, and a guide portion formed above the cylindrical portion to guide the outer diameter holding claw so as to be slidable in the radial direction. The cylindrical guide member and the plurality of vertical planes passing through the axial center are divided at equal angles on the horizontal plane, and the diameter is expanded in the radial direction via the plurality of second urging members in a state where the division surfaces are close to each other. Second cylindrical member A split hollow cylindrical inner diameter holding claw to be mounted; a cylindrical frame that opens downward in the vertical direction and is heated to a predetermined temperature is suspended from the second plate member; When the plurality of split cores constituting the stator are disposed concentrically with both claws between the outer diameter holding claws and the inner diameter holding claws, and when the second plate member descends a predetermined distance downward, When the rod member provided on the second plate member slides the ring member downward in the vertical direction, the plurality of split cores are fitted into the frame with a predetermined size, and when the ring member slides downward in the vertical direction, The outer diameter holding claws slide away in the radial direction from the lower end surfaces of the plurality of divided cores, and the plurality of divided cores are immersed in the frame. Shrink fitting device.   A first plate member that is placed on a horizontal surface and forms a base of the entire apparatus, a plurality of first guide members that are erected on the first plate member, and a first plate that is erected on the first plate member A column member having one column and a second column standing on an upper end surface of the first column, a second plate member guided by the first guide member to be slidable in a vertical direction, and the first plate A plurality of second guide members erected on the member, and a tapered inner hole having a diameter reduced in the vertical direction and guided by the second guide member so as to be slidable in the vertical direction; A ring member that is controlled to slide upward in the vertical direction by a restriction member fixed to the upper end of the ring, and is interposed between the first plate member and the ring member to attach the ring member upward in the vertical direction. Force A first urging member, a tapered portion that engages with the tapered inner hole of the ring member, an inner hole that extends vertically downward from an upper end surface with which the restricting member abuts, and a vertically lower side from the lower end of the inner hole A plurality of vertical planes passing through the axial center and having a tapered inner hole that expands in diameter, and is divided into equal angles on a horizontal plane and fitted into the tapered inner hole of the ring member in a state where the divided surfaces are close to each other. An outer diameter holding claw, a cylindrical portion having a guide hole into which the columnar member is inserted, and a guide portion formed above the cylindrical portion to guide the outer diameter holding claw so as to be slidable in the radial direction. The cylindrical guide member and the plurality of vertical planes passing through the axial center are divided at equal angles on the horizontal plane, and the diameter is expanded in the radial direction via the plurality of second urging members in a state where the division surfaces are close to each other. Second cylindrical member A split hollow cylindrical inner diameter holding claw to be mounted; a cylindrical frame that opens downward in the vertical direction and is heated to a predetermined temperature is suspended from the second plate member; When the plurality of split cores constituting the stator are disposed concentrically with both claws between the outer diameter holding claws and the inner diameter holding claws, and when the second plate member descends a predetermined distance downward, When the rod member provided on the second plate member slides the ring member downward in the vertical direction, the plurality of split cores are fitted into the frame with a predetermined size, and when the ring member slides downward in the vertical direction, The outer diameter holding claws slide away in the radial direction from the lower end surfaces of the plurality of divided cores, and the plurality of divided cores are immersed in the frame. The shrink-fit method.   A first plate member that is placed on a horizontal plane and forms the base of the entire apparatus, a plurality of first guide members that are erected on the first plate member, and a cylinder that is erected on the first plate member A member, a second plate member guided by the first guide member so as to be slidable in the vertical direction, and a plurality of second guide members standing on the first plate member; A ring member having a tapered inner hole having a diameter and being guided by the second guide member so as to be slidable in the vertical direction and fixed to the upper end of the second guide member so as to be slid upward in the vertical direction. A first biasing member that is interposed between the first plate member and the ring member and biases the ring vertically upward, and a tape that engages with the tapered inner hole of the ring member. A plurality of vertical holes passing through the shaft center, having an inner hole extending vertically downward from an upper end surface with which the portion and the regulating member abut, and a tapered inner hole expanding from the lower end of the inner hole downward in the vertical direction A cylinder having an outer diameter holding claw that is divided into equal angles on a horizontal plane by a plane and that is fitted into the tapered inner hole of the ring member in a state where the divided surfaces are close to each other, and a guide hole into which the cylindrical member is fitted. A cylindrical guide member formed on the upper end of the cylindrical portion and having a guide portion that guides the outer diameter holding claw so as to be slidable in the radial direction, and extends from the ring member in the axial direction of the cylindrical member A holding shaft that is slidably held in the vertical direction by the driving member, a regulating portion that is provided at the lower end of the holding shaft and has a larger radial dimension than the holding shaft, and a vertical direction that is provided at the upper end of the holding shaft. Upward A stepped taper shaft member having a taper shaft that expands in diameter, and a second taper member interposed between the drive member and the stepped taper shaft member to urge the stepped taper shaft member vertically upward. The taper shaft with the biasing member and a plurality of vertical planes having a tapered inner diameter that decreases in the vertical direction downward and is divided at an equal angle on the horizontal plane by the vertical plane passing through the axis and in the state where the division planes are close to each other A cylindrical frame that opens downward in the vertical direction and is heated to a predetermined temperature is suspended from the second plate member, wound with a coil, and constitutes a stator as a whole. A plurality of split cores arranged concentrically with the claws between the outer diameter holding claws and the inner diameter holding claws, and when the second plate member slides a predetermined distance downward in the vertical direction, the second plate members Provided in The rod member slides the ring member downward in the vertical direction, the plurality of split cores are fitted into the frame with predetermined dimensions, and the driving member abuts against the restricting portion, whereby the inner diameter holding claw and the The stepped taper shaft member slides the inner peripheral portion of the stator vertically downward against the urging force of the second urging member, and further the ring member slides vertically downward, The outer diameter holding claws slide in the radial direction along with the downward sliding in the vertical direction, and are separated from the lower end surfaces of the plurality of divided cores so that the plurality of divided cores are immersed in the frame. Fitting method.   A shrink-fit fastening body of the plurality of split cores and the frame, manufactured by the method according to claim 3 or 4.

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