JP5452315B2 - Retaining plate for rotating body - Google Patents

Description

  The present invention relates to a rotating plate holding plate represented by an end plate of a motor that is provided at both ends of a motor and supports laminated rotor cores by applying a restraining force.

  In a rotationally driven object typified by a motor, a restraining plate is often provided at both ends of the rotational shaft for the purpose of restraining the rotating body from being displaced in the direction of the rotational axis during the rotational driving. In particular, in a typical motor, end plates are provided as restraining plates at both ends of the rotating shaft for the purpose of restraining the phenomenon that the laminated rotor core, which is a rotating body, is displaced in the direction of the rotating shaft. ing.

  As disclosed in Patent Document 1 and Patent Document 2, the end plate of such a motor is often a circular plate formed of flat plate-like parts, and the end plate is placed on the surface of the rotating body. By bringing them into contact with each other, a binding force was applied to the laminated rotor core that is the rotating body.

  These flat end plates are generally manufactured by punching a sheet-like rolled plate by press working. However, when an end plate is manufactured by press working, warping or the like due to residual stress often occurs in the end plate, and as a result, the end plate is reliably faced to the laminated rotor core that is a rotating body. When such a flat end plate is used, there is often a problem that a restraining force cannot be reliably applied to the rotating body.

  Further, Patent Document 3 and Patent Document 4 propose a technique in which the end plate is not shaped like a flat plate but a plate having a tapered surface. These end plates are only the outer peripheral edge, and apply a restraining force to the laminated rotor cores.

  In recent years, in particular, in order to improve the performance of automobiles and the like, there has been an increasing demand for weight reduction of rotationally driven objects such as motors. The end plate proposed in Patent Documents 3 and 4 is difficult to meet the demand.

  Further, since the rigidity cannot be sufficiently ensured simply by reducing the thickness of the holding plate, a technique for securing the rigidity by forming the holding plate in a concentric circular shape having a concavo-convex cross section has recently been developed. Furthermore, there is a demand for miniaturization, and there is a direction to make the depth of the unevenness as shallow as possible from the viewpoint of space restriction.

  On the other hand, in motors used in automobiles, etc., the purpose of improving performance is to increase the outer shape of the rotor with the rotor core, which is the rotating body, and to increase the rotational speed (number of rotations). There is also a tendency for the centrifugal force to be increased. When the centrifugal force increases, if the rotating body is not firmly restrained, a problem may occur that the rotating body is displaced in the direction of the rotating shaft by the centrifugal force, leading to breakage of parts. For this reason, the restraining force with respect to the rotating body by the restraining plate including the end plate is required to be higher than ever.

JP 2007-259583 A JP 2006-67675 A JP 2008-289329 A JP 2008-86187 A

  The present invention has been made as a solution to the above-mentioned conventional problems. In addition to ensuring rigidity, the present invention adds to the rotating body as the rotational speed increases even if the rotating speed of the rotating body increases. It is an object of the present invention to provide a rotating body restraining plate capable of sufficiently increasing the restraining force.

According to the first aspect of the present invention, an attachment hole through which the rotating shaft is inserted is formed at the center and rotates integrally with the rotating shaft, and contacts with the rotating body disposed on one side surface of the rotating body. A rotating plate holding plate made of a disk that applies a restraining force to the rotating body, wherein the disk has a step on the outer peripheral side of the mounting hole peripheral portion having a flat surface that contacts the rotating body and the mounting hole peripheral portion. A concentric circular section having a concavity and convexity formed by an intermediate portion that is continuous through and not in contact with the rotating body, and an outer edge portion that has a flat surface that is in contact with the rotating body through a step on the outer peripheral side of the intermediate portion. are formed, said outer peripheral side position D ₂ of the mounting hole peripheral portion, is disposed at a position that satisfies the following equation when the inner periphery diameter of the disc was D _1, an outer diameter and D ₃ This is a rotating plate holding plate.

According to a second aspect of the invention, the inner circumferential difference in diameter D ₁ of the outer peripheral-side position D ₂ and the disc of the mounting hole periphery, the difference between the inner circumferential diameter D ₁ and the outer peripheral diameter D ₃ of the disc , 0.45 to 0.68 times. 2. The rotating body restraining plate according to claim 1, wherein

  The invention according to claim 3 is the rotating plate restraining plate according to claim 1 or 2, wherein the thicknesses of the peripheral portion of the mounting hole, the intermediate portion, and the outer edge portion are all the same.

  According to a fourth aspect of the present invention, there is provided the rotating body restraining plate according to the first or second aspect, wherein the thickness of the peripheral portion of the mounting hole is formed thinner on the outer peripheral side than on the inner peripheral side.

  The invention according to claim 5 is characterized in that the plate thickness at the outer peripheral side position of the intermediate portion is equal to or greater than the plate thickness at the outer peripheral side position of the peripheral portion of the mounting hole. It is a holding plate.

  A sixth aspect of the present invention is the rotating body restraining plate according to the fourth or fifth aspect, wherein the thickness of the intermediate portion is formed so that the outer peripheral side is thicker than the inner peripheral side.

  According to a seventh aspect of the invention, the disc is formed by cold forging, and the thickness of the peripheral portion of the mounting hole is such that the inner peripheral side is thicker than the thickness before processing. The plate for the rotating body according to any one of claims 4 to 6, wherein a plate thickness on the outer peripheral side is formed thinner than a plate thickness before processing.

  The invention according to claim 8 is characterized in that the disc is an end plate of a motor, and the rotating body is a rotor core of a laminated motor. It is a holding plate.

  A ninth aspect of the present invention is the rotating body restraining plate according to any one of the first to eighth aspects, wherein the circular plate is formed of a cold rolled material of an aluminum alloy material.

According to the restraining plate of the rotating body according to claim 1 of the present invention, by forming the concentric circular section having a concavo-convex cross section, rigidity can be ensured and the outer peripheral side position D of the peripheral portion of the mounting hole of the circular plate. ₂ is disposed at the diameter calculation position calculated by the above-described equation using the inner diameter D ₁ and the outer diameter D ₃ of the disk, so that even if the rotational speed of the rotating body increases, its rotation As the number increases, the restraining force applied to the rotating body by the outer edge portion can be sufficiently increased.

According to clamping plates of the rotating body according to a second aspect of the present invention, the inner circumferential difference in diameter D ₁ of the outer peripheral-side position D ₂ and disc of the mounting hole periphery of the disc, the outer peripheral diameter D ₃ of the disc the inner circumferential difference in diameter D _1, by a 0.45-.68 times can further increase the restraining force applied to the rotating body by the outer edges in accordance with the rotational speed of the increase in the motor or the like.

  According to the restraining plate for a rotating body according to claim 3 of the present invention, since the thickness of the disc is the same at all positions, the manufacture is easy.

  According to the restraining plate of the rotating body according to claim 4 of the present invention, the deformation rigidity of the peripheral portion of the mounting hole can be lowered by reducing the thickness of the outer peripheral side of the peripheral portion of the mounting hole, and the direction of the rotating body The bending deformation that bends easily occurs, and as a result, the restraining force of the outer edge portion on the rotating body can be increased.

  According to the control plate for a rotating body according to claim 5 of the present invention, the centrifugal force at the time of rotation increases, and as a result, the restraining force on the rotating body by the outer edge can be further increased.

  According to the restraining plate of the rotating body according to claim 6 of the present invention, it is possible to suppress a reduction in the centrifugal force during rotation by suppressing a weight decrease at a position farthest from the rotating shaft of the intermediate portion of the disc, The restraining force with respect to the rotating body by the outer edge portion can be reliably ensured.

  According to the control plate of the rotating body according to claim 7 of the present invention, since it is not necessary to perform machining by cutting, complicated formation of a disk by inexpensive cold forging without being affected by the cost increase due to cutting. Processing can be easily performed.

  According to the control plate for a rotating body according to claim 8 of the present invention, the present invention can be applied to a motor, and the binding force applied to the laminated rotor cores can be increased in accordance with an increase in the rotational speed of the motor. .

  According to the restraining plate for a rotating body according to claim 9 of the present invention, the weight can be reduced by forming the disc with a cold-rolled aluminum alloy material. In addition, since warpage is unlikely to occur during press cutting, cutting performance is also improved.

It is a perspective view which shows the whole shape of the holding plate which concerns on embodiment of this invention. It is the sectional view on the AA line of FIG. 1 including the rotary body which shows the state which applies a restraining force to a rotary body using the holding plate which concerns on one Embodiment of this invention. It is the sectional view on the AA line of FIG. 1 which shows the holding plate which concerns on different embodiment of this invention. It is the sectional view on the AA line of FIG. 1 which shows the holding plate which concerns on further different embodiment of this invention. It is explanatory drawing which shows the radial direction stress (sigma) r distribution when rotating the restraining board of the rotary body of this invention, and the analysis result of the deformation | transformation form of a peripheral part of an attachment hole of a disc, an intermediate part, and an outer edge part. It is explanatory drawing which shows the theoretical calculation value of the circumferential direction stress (sigma) theta and radial direction stress (sigma) r of a disk without a level | step difference, (a) is the theoretical calculation value of circumferential direction stress (sigma) theta, (b) is radial direction stress (sigma) r. The theoretical calculation values of are shown respectively. It is the sectional view on the AA line of FIG. 1 including the rotary body which shows the state which applies a restraining force to a rotary body using the control board which concerns on further different embodiment of this invention. It is the sectional view on the AA line of FIG. 1 including the rotary body which shows the state which applies a restraining force to a rotary body using the control board which concerns on further different embodiment of this invention. It is the sectional view on the AA line of FIG. 1 including the rotary body which shows the state which applies a restraining force to a rotary body using the control board which concerns on further different embodiment of this invention. It is the sectional view on the AA line of FIG. 1 including the rotary body which shows the state which applies a restraining force to a rotary body using the control board which concerns on further different embodiment of this invention. It is the sectional view on the AA line of FIG. 1 including the rotary body which shows the state which applies a restraining force to a rotary body using the control board which concerns on further different embodiment of this invention. It is a longitudinal cross-sectional view which shows the analysis model used for the analysis of an Example. It is a graph which shows the relationship between the rotation angular velocity (rotation speed) (omega) obtained by the analysis of Example 1, and the maximum MISES stress. 6 is a graph showing a relationship between a rotational angular velocity (number of rotations) ω and an end portion restraining force P obtained by analysis of Example 1. FIG. Is a graph showing changes in the maximum MISES stress to differences outer peripheral side position _{D 2} of the mounting hole periphery of the rotational angular velocity 20000 rpm. Is a graph showing changes in the end binding P for differences outer peripheral side position D ₂ of the mounting hole periphery of the rotational angular velocity 20000 rpm. It is a graph which shows the appropriate arrangement position of the outer peripheral side position of the attachment hole periphery part obtained by the analysis of Example 1. FIG. 6 is a graph showing a relationship between a rotational angular velocity (number of rotations) ω and an end portion restraining force P obtained by analysis of Example 1. FIG.

  In recent years, in motors used in automobiles, etc., for the purpose of improving performance, the outer shape of a rotor in which a rotor core as a rotating body is laminated and the rotation speed (the number of rotations) have been increased. The applied centrifugal force also tends to increase, and as a result, it may lead to damage to parts such as a motor. Therefore, the present inventor has ensured sufficient rigidity and the rotational speed (number of rotations) of the rotating body. In order to develop a technology related to a rotating body restraining plate that can apply a sufficient restraining force to the rotating body even if the height of the rotor increases, earnestly advanced experiments and research.

  As a result, the peripheral part of the mounting hole having a flat surface that comes into contact with the rotating body, the intermediate part that continues to the outer peripheral side of the peripheral part of the mounting hole through a step and does not contact the rotating body, and the outer peripheral side of the intermediate part By adopting a concentric circular disk with a concave-convex cross section consisting of an outer edge having a flat surface that contacts the rotating body continuously through a step as a restraining plate for the rotating body, sufficient rigidity is ensured. In addition, even if the rotational speed (number of rotations) of the rotating body is increased by arranging the outer peripheral side position of the periphery of the mounting hole at an appropriate position, the outer edge portion sufficiently restrains the rotating body. The present inventors have found that power can be applied and have completed the present invention.

  In order to further increase the out-of-plane restraining force generated with respect to the rotational motion, the present inventor can effectively reduce the deformation rigidity of the peripheral portion of the mounting hole of the disk. I found out. Specifically, in order to further increase the binding force in the out-of-plane direction, it has also been found that it is effective to form the plate thickness in the periphery of the mounting hole thinner on the outer peripheral side than on the inner peripheral side.

  Hereinafter, the present invention will be described in more detail based on embodiments shown in the accompanying drawings.

  1 and 2 show an embodiment of the present invention, FIG. 1 is a perspective view showing the overall shape of a holding plate, and FIG. 2 shows a state in which a restraining force is applied to a rotating body using the holding plate. It is the sectional view on the AA line of FIG. 1 including a body.

  For example, in a motor to which the present invention is applied, for the purpose of restraining a phenomenon in which a rotor core in which electromagnetic steel plates that are rotating bodies 8 are laminated is displaced in the axial direction of its rotating shaft (not shown). End plates are provided as holding plates 1 on both ends of the rotating shaft. The restraining plate 1 is formed of a disc 2 formed around a mounting hole 6 through which the rotating shaft is inserted. The disc 2 rotates integrally with the rotating shaft and has one side surface. It acts to apply a restraining force to the rotating body 8 by making surface contact with the rotating body 8 arranged on the side.

  This circular plate 2 has an annular plate-shaped mounting hole peripheral portion 3 having a flat surface 3b in surface contact with the rotating body 8 and a step 7 on the outer peripheral side of the circular plate-shaped mounting hole peripheral portion 3. An annular plate-shaped intermediate portion 4 that is continuous and does not contact the rotating body 8, and a flat surface 5 b that continues to the outer peripheral side of the annular plate-shaped intermediate portion 4 via a step 7 and contacts the rotating body 8. It is formed in a concentric circular shape with a concave-convex cross section consisting of an annular plate-shaped outer edge portion 5 having Thus, sufficient rigidity can be ensured by forming the disc 2 in a concentric circular shape with a concave-convex cross section.

  In addition, three 6a shown in FIG. 1 are the locking grooves provided in the circumference | surroundings of the attachment hole 6, Comprising: The locking piece (not shown) provided in the circumference | surroundings of the rotating shaft is locked. Thus, the holding plate 1 can rotate integrally with the rotating shaft that is driven to rotate.

  In the embodiment shown in FIG. 2, the plate thicknesses of the mounting hole peripheral part 3, the intermediate part 4, and the outer edge part 5 constituting the disk 2 are all the same, and the mounting hole peripheral part in surface contact with the rotating body 8. 3 and one outer side surface of the outer edge 5 are flat surfaces 3b and 5b. In the embodiment shown in FIG. 2, the cross-sectional shapes of the mounting hole peripheral portion 3, the intermediate portion 4, and the outer edge portion 5 are all linear, but the cross-sectional shape of the intermediate portion 4 does not necessarily have to be linear. For example, it may be a curved shape such as an arc shape swelled on the rotating body 8 side or the opposite side. Further, as shown in FIGS. 3 and 4, ribs 9 may be formed for reinforcement on the inner peripheral side of the mounting hole peripheral portion 3, but in the case of the embodiment shown in FIG. 4, The length is a condition that it is a length until it comes into contact with the rotating body 8.

  The holding plate 1 may be formed of any material that is non-magnetic material such as metal or resin and can ensure strength. When used as a plate, it is particularly desirable that it be formed of an aluminum plate. Further, from the viewpoint of preventing plastic deformation during rotation, it is desirable that the aluminum plate material has a higher 0.2% proof stress. Furthermore, in consideration of the fact that warpage is unlikely to occur during press cutting and the flat surfaces 3b and 5b are easily formed, a cold made of an aluminum material such as 3000 series, 5000 series, or 6000 series defined in AA to JIS standards. Most preferably, it is formed of a hot rolled material.

  If the restraint plate 1 is formed of a cold rolled material made of an aluminum alloy material, the weight can be reduced as compared with the case where the restraint plate 1 is manufactured using another metal material. Further, when the restraining plate 1 is used as an end plate of a motor, since aluminum itself is a nonmagnetic material, an added value effect that leakage of magnetic field lines can be suppressed can be obtained.

  Among the constituent requirements of the present invention, the most important requirement is the position where the outer peripheral side position 3a of the mounting hole peripheral portion 3 of the disk 2 is arranged. Even if the rotational speed (the number of rotations) of the rotating body 8 is increased by arranging the outer peripheral side position 3a of the mounting hole peripheral portion 3 at an appropriate position, the outer edge portion 5 provides sufficient restraining force to the rotating body 8 Can be added.

  When the position where the outer peripheral side position 3a of the peripheral portion 3 of the mounting hole of the disc 2 is arranged is set to the inner peripheral side with respect to the geometric average value of the outer peripheral diameter and the inner peripheral diameter of the disc 2, the outer edge 5 to the rotating body 8 When the restraining force to be applied becomes very small and the outer peripheral side position 3a of the peripheral portion 3 of the mounting hole is further arranged on the inner peripheral side, the holding plate 1 itself moves in the opposite direction to the rotating body 8 along with the rotational movement thereof. The target binding force cannot be obtained at all. Therefore, in the present invention, the position at which the outer peripheral side position 3a of the mounting hole peripheral part 3 of the disc 2 is arranged is set to a position on the outer peripheral side with respect to the geometric mean value of the outer peripheral diameter and inner peripheral diameter of the disc 2.

Moreover, the restraining force by the pressing plate 1 is expressed due to the radial stress σr when the pressing plate 1 is rotated. This radial stress σr becomes a maximum value at the position of the geometric mean value of the outer peripheral diameter and the inner peripheral diameter of the disk 2, and generally decreases monotonously from the outer peripheral side toward the outer peripheral side of the disk 2. In the outermost periphery of the disk 2, it becomes 0. At least the condition for obtaining the radial stress σr of 50% or more of the maximum value is the diameter calculation position D ₂ calculated by the following equation using the outer peripheral diameter D ₃ and the inner peripheral diameter D ₁ of the disc 2: Is to place.

Also, the disc 2 preferably positions than to place the outer peripheral side position 3a of the mounting hole peripheral portion 3, the disc 2 of the mounting hole periphery 3 the outer peripheral-side position D ₂ and the inner periphery of the diameter D ₁ of the said disc difference, the outer peripheral diameter _{D 3} and the inner circumferential difference in diameter _{D 1} of the said disc, a position within the range of 0.45 to 0.68 times.

  Hereinafter, the more detailed reason which limited the position which arrange | positions the outer peripheral side position 3a of the attachment hole peripheral part 3 of the disc 2 as mentioned above is demonstrated.

  FIG. 5 shows the radial stress σr distribution (the darker indicates that σr is larger) when the restraining plate of the rotating body of the present invention is rotated, and the peripheral portion 3 of the mounting hole of the disk 2 during rotation. It is explanatory drawing which shows the analysis result of the deformation | transformation form of the intermediate | middle part 4 and the outer edge part 5. FIG. As described above, the disc 2 constituting the holding plate 1 of the rotating body 8 according to the present invention includes the mounting hole peripheral portion 3, the intermediate portion 4, and the outer edge portion 5, and includes the mounting hole peripheral portion 3 and the outer edge. The part 5 is in surface contact with the rotating body 8 at flat surfaces 3b and 5b formed on one side surface thereof. Further, the holding plate 1 and the rotating body 8 rotate in the same direction with the rotation axis inserted through the attachment hole 6 as the central axis.

  Along with the rotation, radial stress σr due to centrifugal force is applied to the peripheral portion 3 of the mounting hole, and a step 7 is formed between the intermediate portion 4 and a bending moment M1 is applied. The mounting hole peripheral portion 3 is deformed so as to have a concave shape in the upward direction of FIG. 5 due to the bending moment M1.

  On the other hand, in the intermediate portion 4, in order to suppress the deformation of the peripheral portion 3 of the mounting hole, the bending moment M1 due to the reaction force P applied from the rotating body 8 and the radial stress σr caused by the centrifugal force and the outer edge portion 5 The bending moment M2 in the reverse direction due to the step 7 is generated, and the intermediate portion 4 is deformed so as to have a convex shape upward in FIG.

  Here, assuming a simple flat disk 2 in which no step 7 is formed, the circumferential stress σθ and the radial stress σr at a position radially away from the center of the disk by a radius D / 2 are theoretically Therefore, the following equation can be used.

以上の３式で、νはポアソン比、ρは素材の密度、ωは回転速度、ｇは重力加速度である。

In the above three equations, ν is the Poisson's ratio, ρ is the material density, ω is the rotational speed, and g is the gravitational acceleration.

As shown in FIG. 2, the disc 2 diameter (outside diameter of the disc 2) and D _3, to the diameter of the mounting hole 6 formed in its center (inner circumference of the disc 2) and D ₁ The theoretical calculation values of the radial stress σr and the circumferential stress σθ are as shown in the tables shown in FIGS. 6A and 6B at the respective diameter positions of the disk 2. In these tables, the vertical and horizontal axes are dimensionless.

  Comparing the tables of FIGS. 6A and 6B, the circumferential stress σθ shows a relatively higher value than the radial stress σr, and the inner peripheral edge (mounting hole 6) of the disk 2 is shown. The outer peripheral side) is the maximum value. For this reason, the plastic deformation start condition of the rotating disk 2 depends on the circumferential stress σθ of the inner peripheral edge of the disk 2. Further, in the case of the disc 2 having a constant plate thickness, it is understood that the circumferential stress σθ does not depend on the plate thickness of the disc 2 but greatly depends on the diameter of the disc 2 (the outer peripheral diameter of the disc 2). .

  The restraining plate of the rotating body of the present invention requires that the outer peripheral side position 3a of the peripheral portion 3 of the mounting hole is disposed at an appropriate position, and the plastic deformation start condition of the restraining plate 1 even if the placement position is changed. It can be seen that there is no significant effect.

On the other hand, the radial stress σr includes a D ₃ (outside diameter of the disc 2) of the disc 2 the diameter of the mounting hole 6 formed in its center diameter (of the disc 2 inner circumference) of the D _1, synergy It can be seen that the maximum value is shown at the position where the average value is obtained, and the value decreases rapidly at the position on the inner peripheral side (center side). In order to increase the restraining force applied to the rotating body 8 at the outer edge portion 5, it is effective to increase the bending moment M1, and the step 7 at the boundary between the mounting hole peripheral portion 3 and the intermediate portion 4 and the radial stress σr are reduced. It can be said that increasing the size is effective.

  However, increasing the level difference 7 at the boundary between the mounting hole peripheral portion 3 and the intermediate portion 4 leads to an increase in the space in the thickness direction of the holding plate 1 and an increase in the weight of the holding plate 1. It can be said that it is not a preferable measure.

  On the other hand, if the bending moment M1 is increased by arranging the outer peripheral side position 3a of the peripheral portion 3 of the mounting hole at an appropriate position and making the radial stress σr as close as possible to the maximum value, space constraints and weight increase are minimized. It can be said that the restraining force applied to the rotating body 8 can be increased.

  To summarize the above-described contents, when the outer peripheral side position 3a of the mounting hole peripheral portion 3 is arranged at the position of the geometric mean value of the outer peripheral diameter and inner peripheral diameter of the disc 2 formed around the mounting hole 6. It can be seen that the radial stress σr accompanying the centrifugal force becomes the largest. On the contrary, if the outer peripheral side position 3a of the mounting hole peripheral part 3 is arranged on the inner peripheral side from the position of the geometrical average value of the outer peripheral diameter and the inner peripheral diameter of the disc 2, the radial stress σr rapidly decreases. If the variation is taken into consideration, it is understood that the outer peripheral side position 3a of the mounting hole peripheral portion 3 may be arranged on the outer peripheral side from the position of the geometric mean value of the outer peripheral diameter and the inner peripheral diameter of the disc 2.

The radial stress σr of the disk 2 generally decreases monotonically as it goes toward the outer periphery of the disk 2, and becomes 0 at the outermost periphery of the disk 2. At least the outer peripheral side position 3a of the mounting hole peripheral portion 3 for obtaining the radial stress σr of 50% or more of the maximum value is expressed by the following equation using the theoretical solution of the radial stress σr shown in the equation above. Determined.

  In addition to the bending moment M1 caused by the radial stress σr, the restraining force exerted on the rotating body 8 by the outer edge 5 of the disk 2 is also affected by the bending rigidity of the mounting hole peripheral part 3 and the deformation rigidity of the intermediate part 4. . That is, as the radial length of the mounting hole peripheral portion 3 becomes longer, the mounting hole peripheral portion 3 is more likely to be deformed by receiving the bending moment M1 having a concave shape in the upward direction of FIG. When the radial length of the hole peripheral portion 3 is shortened, the mounting hole peripheral portion 3 is likely to be deformed by receiving the bending moment M2 in which the intermediate portion 4 is convex upward in FIG.

  Further, the influence of the outer peripheral side position 3a of the mounting hole peripheral part 3 on the deformation rigidity of the mounting hole peripheral part 3 and the intermediate part 4 and the influence on the bending moment M1 applied to the outer peripheral side position 3a of the mounting hole peripheral part 3 are considered. In this case, the binding force on the rotating body 8 by the outer edge portion 5 of the disc 2 is such that the outer peripheral side position 3a of the mounting hole peripheral portion 3 is arranged at the position of the arithmetic average value of the outer peripheral diameter and inner peripheral diameter of the disc 2. It turns out that it becomes the highest by doing.

Further, the restraining force of the outer peripheral portion 5 of the disc 2 on the rotating body 8 is such that the outer peripheral side position 3a of the mounting hole peripheral portion 3 is on the inner peripheral side of the arithmetic average value of the outer peripheral diameter and inner peripheral diameter of the disc 2. Compared with the case where it arrange | positions to, the direction arrange | positioned to an outer peripheral side is hard to fall. In consideration of manufacturing variations of the restraining plate 1 itself, the outer peripheral side position 3a of the peripheral portion 3 of the mounting hole of the disc 2 is disposed if the condition for obtaining a binding force of at least 80% or more of the maximum value is within the proper range. A more preferable position is that the difference between the outer peripheral side position D ₂ D of the mounting hole peripheral portion 3 of the disk ₂ and the inner peripheral diameter D ₁ of the disk is the difference between the outer peripheral diameter D ₃ and the inner peripheral diameter D ₁ of the disk. It can be said that a position within a range of 0.45 to 0.68 times the difference is a desirable position. The reason for this will be described in detail in the section of the embodiment.

  The flat surface 5 b of the outer edge portion 5 of the disk 2 is provided to apply a restraining force to the outer peripheral portion of the rotating body 8. For this reason, it is desirable that the outer peripheral diameter of the disc 2 is matched with the outer peripheral diameter of the rotating body 8 as much as possible. Further, since the restraining force by the outer edge portion 5 of the disc 2 is most strongly applied from the inner peripheral side portion of the outer edge portion 5, the length (width) in the radial direction of the outer edge portion 5 is increased, and the flat surface 5b is formed. If it is too wide, the position where the restraining force is applied greatly will be inside the outer peripheral portion of the rotating body 8. The purpose of applying the restraining force to the rotating body 8 is to firmly support the outer peripheral portion of the rotating body 8, and in this sense, the length (width) in the radial direction of the outer edge portion 5 should be the minimum necessary. desirable. Although it depends on the size and thickness of the disc 2, it is specifically about 2 to 10 mm.

  Next, different embodiments of the present invention will be described in detail with reference to FIGS. 7 to 9 show different embodiments of the present invention, respectively, and are cross-sectional views taken along the line AA of FIG. 1 including a rotating body showing a state in which a restraining force is applied to the rotating body using a control plate having a different shape. FIG.

  The holding plate 1 of the embodiment shown in FIG. This circular plate 2 also has an annular plate-shaped mounting hole peripheral portion 3 having a flat surface 3 a that comes into surface contact with the rotating body 8, and a step 7 on the outer peripheral side of the circular plate-shaped mounting hole peripheral portion 3. An annular plate-shaped intermediate portion 4 that is continuous and does not contact the rotating body 8, and a flat surface 5 a that continues to the outer peripheral side of the annular plate-shaped intermediate portion 4 via a step 7 and contacts the rotating body 8. The above-described configuration is the same as that of the embodiment shown in FIG. 2 described above.

  The embodiment shown in FIG. 7 differs from the embodiment shown in FIG. 2 in the cross-sectional shapes of the mounting hole peripheral portion 3 and the intermediate portion 4, that is, the plate thickness. The plate thickness of the peripheral portion 3 of the mounting hole is formed so as to gradually decrease from the inner peripheral side to the outer peripheral side, and the outer peripheral side position 3a is thinner than the inner peripheral side position 3c. . On the other hand, the thickness of the intermediate portion 4 is formed so as to gradually increase from the inner peripheral side to the outer peripheral side, and the outer peripheral side position 4a is thicker than the inner peripheral side position 4c. .

  The greatest feature of this embodiment is that the thickness of the mounting hole peripheral portion 3 is formed so as to gradually decrease from the inner peripheral side toward the outer peripheral side. If the plate thickness of the peripheral portion 3 of the mounting hole is configured in this way, the deformation rigidity of the peripheral portion 3 of the mounting hole is reduced, and bending deformation in which the outer peripheral side of the peripheral portion 3 of the mounting hole is bent in the direction of the rotating body 8 is likely to occur.

  In addition, the thickness of the intermediate portion 4 is formed so as to gradually increase as it goes from the inner circumference side to the outer circumference side. This is because the centrifugal force at the time of rotation of the holding plate 1 is reduced and the binding force applied to the rotating body 8 is reduced.

  Moreover, in this embodiment, the plate | board thickness of the outer peripheral side position 4a of the intermediate part 4 is thicker than the plate | board thickness of the outer peripheral side position 3a of the attachment hole periphery part 3. FIG. By setting the plate thickness of the outer peripheral side position 4a of the intermediate portion 4 and the plate thickness of the outer peripheral side position 3a of the mounting hole peripheral portion 3 in this relationship, the centrifugal force during rotation of the holding plate 1 increases, and the outer edge The restraining force with respect to the rotating body 8 by the part 5 can be increased. In addition, if the plate | board thickness of the outer peripheral side position 4a of the intermediate part 4 is thickness at least equivalent to the plate | board thickness of the outer peripheral side position 4a of the attachment hole periphery part 3, the binding force with respect to the rotary body 8 by the outer edge part 5 will be increased. be able to.

  Further, the plate thickness of the holding plate 1 of the embodiment shown in FIG. 7 is the plate thickness of the inner peripheral side position 3c of the mounting hole peripheral portion 3, the plate thickness of the outer peripheral side position 4a of the intermediate portion 4, and the plate of the outer edge portion 5. The thicknesses are all the maximum thickness because the processing is performed using a plate material made of the same material as the plate material used for manufacturing the holding plate 1 of the embodiment shown in FIG. In the embodiment shown in FIG. 7, the plate thickness processing of the mounting hole peripheral portion 3 and the intermediate portion 4 is performed by cutting, so the mass of the holding plate 1 is the embodiment shown in FIG. Compared to the control plate 1 of the form, it is possible to reduce the weight by the thickness removed by cutting.

  As with the restraining plate 1 of the embodiment shown in FIG. 7, the restraining plate 1 of the embodiment shown in FIG. 8 gradually increases in thickness from the inner peripheral side toward the outer peripheral side. Although it is formed so as to be thin, the thickness of the intermediate portion 4 is all uniform. In the pressing plate 1 of the embodiment shown in FIG. 8, the cutting process is performed only on the peripheral portion 3 of the mounting hole. Therefore, compared with the pressing plate 1 of the embodiment shown in FIG. Can be reduced.

  As with the restraining plate 1 of the embodiment shown in FIG. 8, the restraining plate 1 of the embodiment shown in FIG. 9 gradually increases as the thickness of the mounting hole peripheral portion 3 moves from the inner peripheral side to the outer peripheral side. Although it is formed to be thin, the processing is not performed by cutting, but by press forming such as cold forging.

  9 is also processed using a plate material made of the same material as the plate material used to manufacture the hold plate 1 of the embodiment shown in FIG. 2, but the thickness of the peripheral portion 3 of the mounting hole is processed. Is formed such that the inner peripheral side plate thickness is thicker than the plate thickness before processing, and the outer peripheral side plate thickness is thinner than the plate thickness before processing. When such processing is performed, the plate thickness of the inner peripheral side position 3c of the peripheral portion 3 of the mounting hole is increased, so that the stress at the inner peripheral side position 3c can be further reduced.

  In addition, the embodiment of FIGS. 7 to 9 is formed so that the plate thickness of the peripheral portion 3 of the mounting hole gradually decreases as it goes from the inner peripheral side to the outer peripheral side, and the embodiment of FIG. The thickness of the intermediate portion 4 is formed so as to gradually increase as it goes from the inner peripheral side to the outer peripheral side, but the plate thickness is not necessarily gradually increased from one side to the other side. For example, as shown in FIG. 10 and FIG. 11, it may be processed and formed stepwise or partially inclined.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not limited by the following examples, and the present invention is implemented with appropriate modifications within a range that can meet the gist of the present invention. These are all included in the technical scope of the present invention.

Example 1
As shown in FIG. 12, the restraining plate of the rotating body targeted by the present invention is modeled by an axial reference element, and the reaction force (end restraining force) P at the outer edge portion and the surface contact portion of the rotating body at the time of the rotational motion. Asked. The rotating body is modeled by a rigid wall, and is divided into a surface contact portion with the peripheral portion of the mounting hole and a surface contact portion with the outer edge portion, and the outer edge portion and the surface of the rotating body at the time of rotational movement are arranged. The end restraint force P at the contact portion was investigated.

In Example 1, by disposing the outer peripheral diameter D ₂ of an outer peripheral side position of the mounting hole peripheral portion mounting hole periphery to different positions in the radial direction of the disk, obtain a proper end binding P The range of positions that could be investigated. Although it is a reference, the plastic start condition during the rotational motion was also evaluated by the maximum MISES stress.

  In this analysis, it was assumed that the disk was formed of an aluminum alloy material, and its elastic modulus was 68600 MPa and the Poisson's ratio was 0.3. Other analysis conditions are shown in Table 1. Note that there is no restriction on the inner periphery of the peripheral portion of the mounting hole. For the analysis, general-purpose static implicit software ABAQUS was used.

  FIG. 13 shows the relationship between the rotational angular velocity (number of revolutions) ω and the maximum MISES stress obtained by the analysis, and FIG. 14 shows the relationship between the rotational angular velocity (number of revolutions) ω and the end restraining force P. According to the analysis results shown in FIG. 13 and FIG. 14, the maximum MISES stress and the edge restraining force P both increase according to the rotational angular velocity (rotation number) ω, but the arrangement position of the outer peripheral side position around the mounting hole is It can be seen that only the end restraining force P has an influence.

Also, a change in the outer peripheral side position of the mounting hole periphery of the rotation angular velocity 20000rpm maximum MISES stress (MPa) and the end portion restraining force P for difference _{D 2} (the outer peripheral diameter of the mounting hole periphery) (N), respectively 15 And shown in FIG. As shown in FIG. 15, the maximum MISES stress is not possible to change the arrangement of the outer peripheral-side position D ₂ of the mounting hole periphery, the plastic deformation starting conditions with the rotary motion it can be seen that no effect. On the other hand, the end portion restraining force P, as shown in FIG. 16, has been changed by the arrangement of the outer peripheral-side position D ₂ of the mounting hole periphery, the outer peripheral-side position D ₂ of the mounting hole periphery maximum at about 109mm It can be seen that the end restraining force P decreases as the value of D ₂ increases or decreases.

The ratio of the inner circumferential difference in diameter D ₁ of the outer peripheral-side position D ₂ and disc mounting hole periphery for the difference of the inner circumferential diameter D ₁ and the outer peripheral diameter D ₃ of the disc mounting hole formed at the center, the edge The relationship of the part restraining force P is shown in FIG. FIG. 17 also shows the geometric average position of the outer peripheral diameter D ₃ and the inner peripheral diameter D ₁ of the disc in the same manner. According to FIG. 17, end binding P is the outer circumferential side position D ₂ of the mounting hole periphery, by disposing the outer peripheral side than the geometric mean value of the inner peripheral diameter D ₁ and the outer peripheral diameter D ₃ of the disc It can be seen that a reliable end restraining force P is obtained. Further, the outer peripheral side position D ₂ of the mounting hole periphery, the inner periphery difference in diameter D ₁ of the outer peripheral-side position D ₂ and disc of the mounting hole periphery of the discs, the inner periphery and the outer peripheral diameter D ₃ of the disc the difference in diameter _{D 1,} by forming a position within the range of 0.45 to 0.68 times, end binding P is found to be a more than 80% of its maximum value.

(Example 2)
In the second embodiment, as in the first embodiment, as shown in FIG. 12, the restraining plate of the rotating body targeted by the present invention is modeled by an axial reference element, and the surface contact between the outer edge portion and the rotating body at the time of the rotating motion. The reaction force (end restraint force) P at the part was determined. The rotating body is modeled by a rigid wall, and is divided into a surface contact portion with the peripheral portion of the mounting hole and a surface contact portion with the outer edge portion, and the outer edge portion and the surface of the rotating body at the time of rotational movement are arranged. The end restraint force P at the contact portion was investigated.

  In Example 2, the thickness of the peripheral part of the mounting hole is compared with the reference example (No. 1) in which the outer peripheral side is thinner than the inner peripheral side and the thickness of the peripheral part of the mounting hole is uniform. Then, it was investigated whether a more appropriate end portion restraining force P could be obtained.

  Also in Example 2, in the analysis, it was assumed that the disk was formed of an aluminum alloy material, the elastic modulus was 68600 MPa, and the Poisson's ratio was 0.3. Other analysis conditions are shown in Table 2. Note that there is no restriction on the inner periphery of the peripheral portion of the mounting hole. For the analysis, general-purpose static implicit software ABAQUS was used.

  FIG. 18 shows the relationship between the rotational angular velocity (number of rotations) ω and the end portion restraining force P obtained by the analysis. According to this result, the thickness of the peripheral portion of the perforated hole is formed thinner than the inner peripheral side of the outer peripheral side (No. 2 to 4), so that the reference thickness of the peripheral portion of the mounting hole is uniform. (No. 1) shows that a higher edge restraining force P is obtained.

DESCRIPTION OF SYMBOLS 1 ... Holding plate 2 ... Disk 3 ... Mounting hole peripheral part 3a ... Outer peripheral side position 3b ... Flat surface 3c ... Inner peripheral side position 4 ... Middle part 4a ... Outer peripheral side position 4c ... Inner peripheral side position 5 ... Outer edge part 5b ... Flat surface 6 ... Mounting hole 6a ... Locking groove 7 ... Step 8 ... Rotating body 9 ... Rib

Claims (9)

From a disk that is formed around the mounting hole through which the rotating shaft is inserted, rotates together with the rotating shaft, and contacts the rotating body arranged on one side surface thereof and applies a restraining force to the rotating body A rotating plate holding plate,
The disc includes a peripheral part of the mounting hole having a flat surface that contacts the rotating body, an intermediate part that continues to the outer peripheral side of the peripheral part of the mounting hole via a step and does not contact the rotating body, and an intermediate part thereof Is formed in a concentric circular shape with a concavo-convex shape composed of an outer edge portion having a flat surface which is continuous on the outer peripheral side through a step and contacts the rotating body,
Rotary body outer peripheral side position D ₂ of the mounting hole periphery, characterized in that it is arranged at a position that satisfies the following equation when the inner periphery diameter of the disc was D _1, an outer diameter and D ₃ Restraining plate.

Inner circumferential difference in diameter _{D 1} of the outer peripheral-side position _{D 2} and the disc of the mounting hole periphery, the outer periphery diameter _{D 3} and the inner circumferential difference in diameter _{D 1} of the said disc, .45-.68 The holding plate for a rotating body according to claim 1, wherein the holding plate is doubled.   3. The rotating body restraining plate according to claim 1, wherein the plate thicknesses of the peripheral part of the mounting hole, the intermediate part, and the outer edge part are the same.   The plate of the periphery of the mounting hole is formed so that the outer peripheral side is thinner than the inner peripheral side thereof.   The plate for a rotating body according to claim 4, wherein a plate thickness at an outer peripheral side position of the intermediate portion is equal to or greater than a plate thickness at an outer peripheral side position of a mounting hole peripheral portion.   6. The rotating body restraining plate according to claim 4, wherein the thickness of the intermediate portion is formed such that the outer peripheral side is thicker than the inner peripheral side.   The disk is formed by cold forging, and the thickness of the peripheral portion of the mounting hole is such that the inner peripheral side is thicker than the plate thickness before processing, and the outer peripheral side plate The plate for rotating a rotating body according to any one of claims 4 to 6, characterized in that the thickness is formed thinner than the plate thickness before processing.   8. The rotating body restraining plate according to claim 1, wherein the disk is an end plate of a motor, and the rotating body is a rotor core of a stacked motor.   9. The rotating body restraining plate according to claim 1, wherein the disk is formed of a cold-rolled aluminum alloy material.

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