JP2008141799A - Rotor for rotary electric machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive rotor for a rotary electric machine, which fully exhibits magnetic characteristics and enables fixation of a magnet by simple manufacturing process without using an adhesive agent. <P>SOLUTION: The rotor for the rotary electric machine includes laminated cores 1 having a penetration hole 2 at the center portion allowing a shaft 3 to pass therethrough, and a plurality of substantially circular arc-shaped magnets 5 are arranged on the outer circumferential portion of the laminated cores 1. The laminated cores 1 are constituted by laminating a large number of substantially disk-like steel plates 11 having the shaft insertion hole 12 formed at the center portion thereof. The laminated cores includes, inside of the respective steel plates 11, a projection part forming steel plate 11, located between the mutually adjacent magnets 5, wherein the claw-shaped projecting part 13 abutting on the magnets 5 on both sides is formed only in one portion of the outer circumferential portion, allowing the projection forming steel plate 11 to be provided in any layer so as to interpose the claw-shaped projection part 13 between the mutually adjacent magnets 5 in at least one portion. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention includes a substantially cylindrical laminated iron core provided with a through-hole through which a shaft passes at the center, and a plurality of substantially arc-shaped magnets are arranged along the circumferential direction of the outer circumference of the laminated iron core. The present invention relates to a rotor for a rotating electrical machine.

  Conventionally, in this type of rotor for a rotating electrical machine, when a plurality of substantially arc-shaped magnets are disposed along the outer periphery of the rotor core, an adhesive is applied to the surface of the rotor core and the joint between the magnets. The magnet is fixed with. However, it is difficult to manage the adhesive for fixing the magnet. For example, when using a laminated core in which approximately disc-shaped steel plates are laminated as the rotor core, the surface of the iron core should be adequate before applying the adhesive. Even if it is cleaned, hardening-inhibiting substances such as oily components that hinder the hardening of the adhesive are likely to remain in the iron core gap. This causes a problem that the magnet is peeled off during rotation.

  Therefore, in order to deal with this problem, in the prior art, a magnet mounting hole for mounting a magnet is provided on the surface facing the stator of the rotor core, leaving a thin portion, and the magnet is inserted into the magnet mounting hole from the axial direction. The thing fixed by doing is provided (for example, refer patent document 1).

  Moreover, in another prior art, the protrusion part which protrudes from the outer peripheral part of a rotor core is provided, and the magnet is inserted between these protrusion parts from the axial direction, and the magnet is fixed (for example, refer patent document 2). .

JP 2001-309591 A JP 2001-169485 A

  However, in the thing of patent document 1, since the thin part which covers a magnet is located in the path | route of the magnetic flux generate | occur | produced from the magnet, the distance (air gap) of an opposing surface with a stator increases, and the magnetic flux which arises in an air gap As a result, the magnetic force characteristic of the magnet cannot be fully exhibited. Even when the thin portion is made thin, it is very difficult to make the thickness equal to or less than the plate thickness in the manufacturing method using an iron core press.

  Moreover, in patent document 2, although there is no part which obstruct | occludes the path | route of the magnetic flux generate | occur | produced from a magnet on the magnet surface, it is necessary to ensure the slight clearance required in order to insert a magnet from an axial direction between protrusion parts. . For this reason, after the magnet is inserted, in order to prevent the magnet from vibrating and being damaged by the gap, it is necessary to insert a resin member between the magnet and the rotor core to fill the gap. As a result, the manufacturing process becomes complicated and the number of members increases and the cost increases, and the resin member is present in the magnetic path on the back yoke side of the magnet. There was a problem that the characteristics of the magnet could not be fully exhibited.

  The present invention has been made in order to solve the above-mentioned problems, and can fully exhibit the characteristics of the magnet. Moreover, the magnet can be securely fixed by a simple manufacturing process, and inexpensive rotation can be achieved. It aims at providing the rotor for electric machines.

  In order to achieve the above object, the present invention comprises a substantially cylindrical laminated iron core provided with a through-hole through which a shaft passes at the center, and the outer circumference of the laminated iron core is substantially circular along the circumferential direction. A rotating electrical machine rotor in which a plurality of arc-shaped magnets are arranged employs the following configuration.

  That is, in the present invention, the laminated iron core is configured by laminating a large number of substantially disc-shaped steel plates in which the shaft insertion hole is formed at the center thereof. Includes protrusion-formed steel plates in which claw-like protrusions for magnet locking that are located between magnets adjacent to each other in the direction and abut against the magnets on both sides thereof are formed only at one location on the outer periphery, The protrusion-formed steel sheet is provided in any layer so that at least one nail-like protrusion is interposed between adjacent magnets.

  According to the present invention, each magnet can be securely fixed to the outer peripheral portion of the laminated core simply by press-fitting the shaft into the through hole of the laminated core. For this reason, it is not necessary to use an adhesive agent as in the prior art or to provide a thin portion covering the magnet. In addition, since the magnet can be fixed without inserting the magnet between the claw-shaped projections from the axial direction, an extra gap for inserting the magnet between the claw-shaped projections is not required, and the resin for filling the gap There is no need for a separate member or adhesive. Therefore, the magnet 5 can be securely fixed to the laminated core 1 over a long period of time while fully exhibiting the characteristics of the magnet, and the magnet can be fixed by a simple manufacturing process. It becomes possible to provide.

Embodiment 1 FIG.
1 is a perspective view showing the entire rotor for a rotating electrical machine according to Embodiment 1 of the present invention, FIG. 2 is a plan view of the rotor viewed from the axial direction, and FIG. 3 is one layer of a laminated core of the rotor. FIG. 4 is a perspective view showing a state in which the laminated core is disassembled for each layer, and FIG. 5 is a view showing a state in which a state in which a magnet is fixed to the laminated core is developed along the circumferential direction.

  The rotor for a rotating electrical machine according to the first embodiment includes a substantially cylindrical laminated iron core 1, and a shaft 3 is inserted through a through hole 2 provided at the center of the laminated iron core 1. Further, on the outer peripheral portion of the laminated iron core 1, substantially arc-shaped magnets 5 are arranged at equal intervals at a plurality of locations (10 locations in this example) along the circumferential direction, and each magnet 5 is fixed by a claw-shaped projection 13 described later. Has been.

  The laminated core 1 is configured by laminating a number of substantially disc-shaped steel plates 11 made of silicon steel plates or the like along the axial direction. And in the steel plate 11 of each layer, the insertion hole 12 of the shaft 3 is formed in the center part. Moreover, in this example, since the bottom surface in the thickness direction of each magnet 5 is formed in a flat shape, the outer peripheral portion of the steel plate 11 of each layer is notched in a straight line, and the whole is a regular decagonal shape. A claw-like protrusion 13 for locking the magnet is provided at one corner of the outer peripheral portion and is located between the adjacent magnets 5 and simultaneously abuts on the magnets 5 on both sides thereof.

  Furthermore, the steel plates 11 of each layer are arranged in a state where the phases are sequentially shifted every 36 degrees along the circumferential direction with the insertion hole 12 as the center. Thereby, in this example, the steel plate 11 for ten layers arrange | positioned mutually shifted in the circumferential direction is made into 1 unit, and this is repeated in the same state in the lamination direction. Therefore, as shown in FIG. 5, when attention is paid to the position of the claw-shaped protrusions 13, one claw-shaped protrusion 13 is arranged for every 10 layers between the adjacent magnets 5, and along the circumferential direction. When viewed, the claw-like projections 13 are arranged in a spiral while being shifted in the axial direction by one layer every 36 degrees. Thus, in this Embodiment 1, since the nail | claw-shaped projection part 13 is formed in each steel plate 11, all the steel plates 11 are the projection part formation steel plates in a claim.

  Here, as shown in FIG. 6 (a), the laminated core 1 pulls out the claw-like projections 13 of the steel plates 11 of the respective layers in the direction away from the center of the through-holes 2, so The magnet arrangement space can be expanded. Therefore, as shown in FIG. 6B, the magnet 5 can be inserted in this direction from the outer periphery toward the center of the through hole 2.

  Next, a procedure for fixing the magnet 5 to the laminated core 1 in the rotor for a rotating electrical machine having the above configuration will be described with reference to FIG.

  First, the claw-like protrusions 13 of the steel plates 11 of the laminated core 1 are pulled out in the direction away from the center of the through hole 2. As a result, the gap between the adjacent claw-shaped projections 13 can be widened, and the magnet 5 is arranged in the space between the claw-shaped projections 13 thus expanded (FIGS. )reference).

  Next, while pressing the magnet 5 against the center of the through-hole 2, the nail-like protrusion 13 pulled out at the same time is pushed back toward the center of the through-hole 2 so that each magnet 5 has no gap between the adjacent nail-like protrusions 13. Positioning is performed (see (c) in the same figure). Subsequently, by pressing the shaft 3 into the through-hole 2, the steel plates 11 are integrated and configured as the laminated iron core 1, and at the same time, the magnets 5 are formed on the surface of the laminated iron core 1 by the claw-shaped protrusions 13. It is pressed and fixed (see FIG. 4D).

  Thus, according to this Embodiment 1, each magnet 5 can be reliably fixed to the outer peripheral part of the laminated iron core 1 only by press-fitting the shaft 3 into the through hole 2. For this reason, it is not necessary to use an adhesive agent as in the prior art or to provide a thin portion that covers the magnet 5. Further, since the magnet can be fixed without inserting the magnet between the claw-like projections 13 from the axial direction, an extra gap for inserting the magnet between the claw-like projections 13 is not required, and the gap is filled. No additional resin member or adhesive is required. Therefore, the magnet 5 can be securely fixed to the laminated iron core 1 for a long time while fully exhibiting the characteristics of the magnet 5, and the magnet 5 can be fixed by a simple manufacturing process. It becomes possible to provide a child.

  In the first embodiment, the claw-shaped protrusions 13 are formed on all the steel plates of each layer to form the protrusion-formed steel plate 11, and the protrusion-formed steel plates 11 of each layer are sequentially phased every 36 degrees along the circumferential direction. Although the claw-like projections 13 need only be interposed between the magnets 5 in such a number that the magnets 5 can be stably fixed, the respective layers are necessarily formed as the projection-formed steel plates 11. Rather, for example, as shown in FIG. 8 in which the rotor is developed along the circumferential direction so that at least one claw-like projection 13 is interposed between the magnets 5 adjacent to each other, the claw-like projection 13 is It is also possible to adopt a configuration in which the protrusion-formed steel sheet 11 formed with the claw-like protrusions 13 is appropriately inserted and arranged while a plurality of non-projection-formed steel sheets 41 are laminated.

Embodiment 2. FIG.
9 is a plan view showing a steel plate for one layer of a laminated core of a rotor for a rotating electrical machine, FIG. 10 is a perspective view showing a state in which the laminated core is disassembled for each layer, and FIG. 11 shows the rotor viewed from the axial direction. It is a top view, and the same code | symbol is attached | subjected to the component corresponding or equivalent to Embodiment 1 shown in FIG. 1 thru | or FIG.

  As shown in FIG. 9 and FIG. 10, the steel plate 11 of each layer constituting the laminated iron core has an insertion hole 12 of the shaft 3 formed at the center thereof, and claw-like protrusions 13 at two locations on the outer peripheral portion. Is formed. In this case, the two claw-like projections 13 are set so that the distance between them is slightly larger than the circumferential width of each magnet 5. Moreover, as shown in FIG. 11, with respect to the magnet 5 disposed between the two claw-shaped projections 13, the magnet 5 cannot be directly fixed, and the magnets are located on the outer sides of the both claw-shaped projections 13. Each claw-shaped protrusion 13 abuts on the side surface portion 5 and serves to fix the magnet 5.

  For example, in FIG. 10, the magnet that is positioned between the two claw-shaped projections 13 of the second steel plate 11 from the top has a claw-shaped projection 13 on the right side of the first steel plate 11 on the left side. And the claw-like protrusion 13 on the left side of the third-layer steel plate 11 is fixed to the right side surface thereof.

  In this way, by disposing the steel plates 11 of each layer by shifting along the circumferential direction by the phase angle of the magnet 5 (in this case, 36 degrees), the claw-shaped protrusions 13 spiral on the circumferential surface of the laminated core 1. The magnet 5 is fixed by press-fitting the shaft 3 as in the first embodiment.

  That is, in order to fix the magnet 5 to the laminated core 1, as shown in FIG. 12, first, the claw-like projections 13 of the respective steel plates 11 of the laminated core 1 are pulled out in the direction away from the center of the through hole 2 and adjacent to each other. After widening the gap between the claw-shaped projections 13 (see FIG. 1A), the magnet 5 is disposed in the space between the claw-shaped projections 13 (see FIG. 1B).

  Next, while pressing the magnet 5 against the center of the through-hole 2, the nail-like protrusion 13 pulled out at the same time is pushed back toward the center of the through-hole 2 so that each magnet 5 has no gap between the adjacent nail-like protrusions 13. Positioning is performed (see (c) in the same figure). Subsequently, by pressing the shaft 3 into the through-hole 2, the steel plates 11 are integrated and configured as the laminated iron core 1, and at the same time, the magnets 5 are formed on the surface of the laminated iron core 1 by the claw-shaped protrusions 13. Pressed and fixed.

  As described above, in the second embodiment as well, similarly to the first embodiment, each magnet 5 can be reliably fixed to the outer peripheral portion of the laminated core 1 simply by press-fitting the shaft 3 into the through hole 2. It is not necessary to use an adhesive. In addition, since the magnet 5 can be disposed without inserting the magnet 5 from the axial direction between the claw-shaped protrusions 13, a gap for inserting the magnet 5 between the claw-shaped protrusions 13 is not necessary. There is no need for a separate resin or adhesive to fill the surface. Therefore, since the magnet 5 can be fixed by a simple manufacturing process, an inexpensive rotor for a rotating electrical machine can be provided.

Embodiment 3 FIG.
FIG. 13 is a plan view showing a steel plate for one layer of the laminated core of the rotor for a rotating electric machine according to Embodiment 3 of the present invention, and FIG. 14 is a cross-sectional view taken along the lines AA and BB in FIG. FIG. 15 is a perspective view showing a state in which the laminated core is disassembled for each layer, and the same reference numerals are given to components corresponding to or corresponding to those of the first embodiment shown in FIGS.

The feature of this third embodiment is that, in order to integrally connect the steel plates 11 constituting the laminated iron core 1, the peripheral portions of the insertion holes 12 of the steel plates 11 are caulked in a semi-cut shape so as to be circular in plan view. The formed convex portion 15 and two elongated holes 16 each having a larger width than the convex portion 15 and along the peripheral edge of the insertion hole 12 are formed. And the convex part 15 and the long hole 16 are shifted and provided along the circumferential direction by the same angle θ as the circumferential arrangement angle θ of the magnet 5 (36 degrees in this example). The long holes 16 and the long holes 16 are opposed to each other with respect to the center O of the insertion hole 12.
Other configurations are the same as those in the first embodiment.

  When the steel plates 11 of each layer are arranged in a state where the phase is shifted every 36 degrees along the circumferential direction with the insertion hole 12 as the center, and these steel plates 11 are laminated, FIG. 15 and FIGS. 16 (a1) and (a2) As shown in FIG. 5, the convex portion 15 of the upper steel plate 11 is fitted into the long hole 16 (shown by a broken line) of the lower steel plate 11. Further, the convex portion 15 of the lower steel plate 11 is fitted into the long hole 16 of the lower steel plate 11. In this way, the steel plates 11 between the upper and lower layers of each layer are connected to each other by the convex portions 15 and the long holes 16 so that the entire laminated core 1 is integrated.

  Therefore, when the magnet 5 is attached to the laminated core 1, the claw-like protrusions 13 of the steel plates 11 of the laminated core 1 are moved away from the center of the insertion hole 12, as shown in FIGS. 16 (b1) and (b2). When pulled out, each convex portion 15 moves along the shape of the long hole 16, so that the gap between the adjacent claw-like projections 13 is widened while the magnets 5 are mounted while keeping the steel plates 11 of each layer connected to each other. can do.

  As described above, in the second embodiment, since the convex portion 15 can move along the long hole 16, the wide and narrow adjustment of the magnet arrangement space between the claw-like projections 13 can be easily performed. Further, when the laminated core 1 manufactured by the iron core mold is manufactured by the pressing process, it can be handled in an integrated state thereafter, so that it is easier to handle the steel plate 11 than to handle a loose steel plate, and productivity is improved. improves.

Embodiment 4 FIG.
FIG. 17 is a plan view showing a steel plate for one layer of the laminated core of the rotor for a rotating electrical machine according to the fourth embodiment of the present invention, and corresponds to or corresponds to the first embodiment shown in FIGS. Parts are denoted by the same reference numerals.

The feature of the fourth embodiment is that, as in the first embodiment, one claw-like projection 13 is provided on each layer of the steel plate 11, but a part of the steel plate 11 is formed at the base of the claw-like projection 13. The thin-walled portion 18 is formed by cutting it into a U-shape, whereby the claw-shaped protrusion 13 is configured to have elasticity. Further, as shown in the drawing, the claw-like protrusion 13 itself can be made more elastic with respect to the circumferential direction if it is partially cut out in a U-shape.
Other configurations are the same as those of the first embodiment.

  When the thickness of the magnet 5 and the dimension in the width direction greatly vary with respect to the magnet installation space secured between the two claw-shaped protrusions 13 in the circumferential direction, there is a gap around the magnet 5 or the magnet 5, the stress may concentrate due to the contact state with the claw-shaped protrusion 13, and in the worst case, part of the magnet 5 may be damaged and fall off.

  On the other hand, when the thin-walled portion 18 is formed by partially cutting off the base of the claw-like projection 13 as in the fourth embodiment, the claw-like projection 13 is brought into elastic contact with the magnet 5. Therefore, the magnet 5 can always be fixed without a gap, and the magnet 5 can be reliably fixed without stress concentration.

  In addition to the configuration illustrated in FIG. 17, for example, as illustrated in FIG. 18, it is also possible to partially cut the steel plate 11 in an arc shape at the base of the claw-shaped protrusion 13 to form the thin portion 18. The same effects can be obtained. Furthermore, as shown in FIG. 19, even when two claw-shaped projections 13 are formed on the outer peripheral portion of the steel plate 11, the steel plate 11 is partially cut in an arc shape at the base of these claw-shaped projections 13. It is also possible to form the thin-walled portion 18 by lacking, and the same operational effects can be achieved.

Embodiment 5. FIG.
20 is a perspective view showing the entire rotor for a rotating electrical machine according to Embodiment 5 of the present invention, and FIG. 21 is a plan view of the rotor seen from the axial direction. The embodiment shown in FIGS. Constituent elements corresponding to or corresponding to the first embodiment are denoted by the same reference numerals.

A feature of the fifth embodiment is that steel plates 21 as thrust restricting members that are in contact with the axial end surfaces of the respective magnets 5 are respectively provided at the upper and lower ends in the axial direction of the laminated core 1. In other words, the upper and lower steel plates 21 are formed with protrusions 22 that contact the end surfaces of the magnets 5 in the axial direction on the outer periphery thereof. Thereby, since each magnet 5 is restricted not only in the circumferential direction but also in the axial direction, each magnet 5 can be more reliably fixed to the laminated core 1.
Other configurations are the same as those in the first embodiment.

  In the fifth embodiment, the steel plate 21 having the projections 22 is provided as the thrust restricting member. However, the thrust restricting member is configured by a simple disk or regular polygon plate that abuts the end surface in the axial direction of each magnet 5. It is also possible.

  The present invention is not limited to the configurations of the above-described first to fifth embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in the first to fifth embodiments described above, ten magnets 5 are arranged in the laminated iron core 1, but the present invention is not limited to the number of such magnets 5, and a plurality of magnets are provided. It is possible to apply to what arranged 5. In addition, the configurations of Embodiments 1 to 5 can be combined as appropriate.

It is a perspective view which shows the whole rotor for rotary electric machines in Embodiment 1 of this invention. It is the top view which looked at the same rotor from the axial direction. It is a top view which shows the steel plate for 1 layer of the laminated core of the same rotor. It is a perspective view which shows the state which decomposed | disassembled the laminated iron core of the same rotor for every layer. It is a figure which shows the state which expand | deployed the state which fixed the magnet to the laminated iron core of the same rotor along the circumferential direction. It is explanatory drawing in the case of fixing a magnet to the laminated iron core of the same rotor. It is explanatory drawing of the procedure which fixes a magnet to the laminated iron core of the rotor. FIG. 10 is a diagram illustrating a modification of the rotor for a rotating electrical machine according to the first embodiment of the present invention and illustrating a state in which a state in which a magnet is fixed to a laminated core is developed along a circumferential direction. It is a top view which shows the steel plate for 1 layer of the laminated iron core of the rotor for rotary electric machines in Embodiment 2 of this invention. It is a perspective view which shows the state which decomposed | disassembled the laminated iron core of the same rotor for every layer. It is the top view which looked at the same rotor from the axial direction. It is explanatory drawing of the procedure which fixes a magnet to the laminated iron core of the rotor. It is a top view which shows the steel plate for 1 layer of the laminated iron core of the rotor for rotary electric machines in Embodiment 3 of this invention. It is sectional drawing along the AA line and BB line of FIG. In Embodiment 3 of this invention, it is a perspective view which shows the state which decomposed | disassembled the laminated iron core for every layer. In the same rotor, the connection state of the steel plates of each layer of the laminated core is shown. FIG. (A1) is a plan view, and FIG. (A2) is a cross-sectional view taken along the line CC in FIG. (B1) is a plan view, and (b2) is a cross-sectional view taken along the line DD of FIG. (B1). It is a top view which shows the steel plate for 1 layer of the laminated iron core of the rotor for rotary electric machines in Embodiment 4 of this invention. It is a top view which shows the modification of the steel plate for 1 layer of the laminated iron core of the rotor for rotary electric machines of Embodiment 4 of this invention. It is a top view which shows the other modification of the steel plate for 1 layer of the laminated iron core of the rotor for rotary electric machines of Embodiment 4 of this invention. It is a perspective view which shows the whole rotor for rotary electric machines in Embodiment 5 of this invention. It is the top view which looked at the same rotor from the axial direction.

Explanation of symbols

1 laminated iron core, 2 through hole, 3 shaft, 5 magnet,
11 steel plate (projection forming steel plate), 12 insertion hole, 13 claw-like projection, 15 convex,
16 long hole, 18 thin part, 21 steel plate (thrust restricting member).

Claims (5)

Rotating electrical machine rotation provided with a substantially cylindrical laminated iron core with a through-hole through which the shaft passes in the center, and a plurality of substantially arc-shaped magnets arranged along the circumferential direction on the outer circumference of this laminated iron core In the child, the laminated iron core is formed by laminating a number of substantially disk-shaped steel plates each having a shaft insertion hole formed in the center thereof. Magnets adjacent to each other are included, including protrusion-formed steel plates in which claw-shaped protrusions for magnet locking that are located between adjacent magnets and abut against the magnets on both sides thereof are formed only at one location on the outer periphery. A rotor for a rotating electrical machine, wherein the protrusion-formed steel plate is provided in any layer so that at least one nail-like protrusion is interposed therebetween. Rotating electrical machine rotation provided with a substantially cylindrical laminated iron core with a through-hole through which the shaft passes in the center, and a plurality of substantially arc-shaped magnets arranged along the circumferential direction on the outer circumference of this laminated iron core In the child, the laminated iron core is formed by laminating a number of substantially disk-shaped steel plates each having a shaft insertion hole formed in the center thereof. Magnets adjacent to each other are included, including protrusion-formed steel plates that are formed between two adjacent magnets and have nail-like protrusions for magnet locking that are in contact with only one of the magnets at two locations on the outer periphery. A rotor for a rotating electrical machine, wherein the protrusion-formed steel plate is provided in any layer so that at least two claw-shaped protrusions are interposed therebetween. In the peripheral part of the insertion hole of each steel sheet, a circular convex part for connecting steel sheets, and a long hole having a mouth width larger than the convex part and along the peripheral edge of the insertion hole are formed together, 3. The rotation according to claim 1, wherein the convex portion and the elongated hole are provided so as to be shifted in position along the circumferential direction by the same angle as a circumferential arrangement angle of the magnet. Rotor for electric machine. The rotor for a rotating electrical machine according to any one of claims 1 to 3, wherein a thin-walled portion in which a part of the steel plate is cut out is formed at a base of the claw-shaped protrusion. . The thrust control member which contact | abuts the axial direction end surface of each said magnet is provided in the axial direction upper and lower ends of the said laminated iron core, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. Rotating machine rotor.

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