WO2013147073A1 - Eddy-current-type reduction gear - Google Patents
Eddy-current-type reduction gear Download PDFInfo
- Publication number
- WO2013147073A1 WO2013147073A1 PCT/JP2013/059359 JP2013059359W WO2013147073A1 WO 2013147073 A1 WO2013147073 A1 WO 2013147073A1 JP 2013059359 W JP2013059359 W JP 2013059359W WO 2013147073 A1 WO2013147073 A1 WO 2013147073A1
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- Prior art keywords
- braking
- pole piece
- support member
- magnet
- pole pieces
- Prior art date
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
- H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
- H02K49/043—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with a radial airgap
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/10—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current
- H01F7/11—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current reducing or eliminating the effects of eddy currents
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/145—Stator cores with salient poles having an annular coil, e.g. of the claw-pole type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
- H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
- H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
- H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
- H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
- H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
- H02K49/046—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type with an axial airgap
Definitions
- the present invention relates to an eddy current type speed reducer (hereinafter referred to as a retarder) for vehicles mounted as an auxiliary brake on, for example, a large-sized / medium-sized bus or truck.
- a retarder eddy current type speed reducer
- it is intended to reduce the operating force required for switching between braking on and braking off (hereinafter referred to as the required operating force).
- an engine brake and an exhaust brake are mounted as auxiliary brakes in addition to a foot brake (friction brake) which is a main brake.
- a foot brake vibration brake
- the capacity of engine brakes and exhaust brakes has been reduced as the engine mounted on a vehicle has been reduced in displacement, and therefore, the number of cases where a retarder has been introduced to strengthen the auxiliary brakes has increased.
- Retarders are broadly divided into methods using electromagnets and methods using permanent magnets in order to generate a magnetic field that provides braking force. Recently, permanent magnet type retarders that do not require energization during braking have become mainstream. It has become. This permanent magnet type retarder is classified into two types, a drum type and a disk type, according to the shape of the braking member to which the braking force is provided.
- Patent Literature 1 and Patent Literature 2 disclose a general configuration of a permanent magnet type retarder mounted on a large vehicle.
- Patent Document 1 discloses a drum-type retarder.
- a cylindrical braking drum 2 as a braking member is fixed to a rotating shaft 1 such as a propeller shaft.
- a ring-shaped magnet support member 4 provided with a plurality of permanent magnets 3 in the circumferential direction is arranged inside the brake drum 2.
- a ferromagnetic pole piece 5 is disposed between the group of permanent magnets 3 and the braking drum 2 at the same angular position as the permanent magnet 3.
- These pole pieces 5 are supported by a support body 6 in which a nonmagnetic support member 6 a is interposed between the pole pieces 5.
- Patent Document 2 discloses a disk-type retarder. As shown in FIG. 11, this retarder has a disc-shaped braking disk 7 as a braking member fixed to the rotating shaft 1.
- annular magnet support member 4 provided with a plurality of permanent magnets 3 in the circumferential direction is disposed so as to face the main surface 7a of the brake disk 7.
- a ferromagnetic pole piece 5 is disposed between the group of permanent magnets 3 and the braking disk 7 at the same angular position as the permanent magnet 3.
- These pole pieces 5 are supported by a support body 6 in which a nonmagnetic support member 6 a is interposed between the pole pieces 5.
- the brake support is switched on and off by moving the magnet support member to a predetermined position.
- FIGS. 10 and 11 (c) are diagrams showing a magnetic circuit configuration during non-braking.
- Patent Document 3 proposes a retarder for reducing the required operating force required for the rotation of the magnet support member when switching between braking on and braking off.
- the retarder proposed in Patent Document 3 is configured such that an outer magnet ring and an inner side are arranged such that a plurality of permanent magnets are arranged at predetermined intervals in the circumferential direction from the brake drum side, facing the inner peripheral surface of the brake drum. Magnet rings are provided so that the permanent magnets face each other.
- the plurality of permanent magnets are arranged such that the magnetic poles are oriented in the circumferential direction and the magnetic poles facing in the circumferential direction are the same polarity.
- the inner magnet ring the plurality of permanent magnets are arranged such that the magnetic poles are directed in the diameter direction and the magnetic poles adjacent in the circumferential direction are alternately opposite in polarity.
- the inner circumferential surface of the outer magnet ring is formed with recesses extending from the permanent magnet at both ends in the circumferential direction extending along the permanent magnet, and the outer magnet ring is further provided at both ends of the recess.
- the dug-down part dug down is formed avoiding the permanent magnet.
- Patent Document 4 A retarder configured as described above was proposed (Patent Document 4).
- the retarder proposed in Patent Document 4 since the number of parts does not change, there is no problem that the manufacturing cost increases. However, when trying to further reduce the cost and size of the entire apparatus, the retarder proposed in Patent Document 4 lacks the force of the air cylinder. On the other hand, if an air cylinder that satisfies a predetermined pushing and pulling force is employed, the cost and size cannot be reduced.
- JP-A-1-298948 Japanese Patent Laid-Open No. 1-234044 JP 2007-82338 A Japanese Patent No. 4581186
- the problem to be solved by the present invention is that the conventional retarder for reducing the required operating force required for switching between braking on and braking off has a large number of parts. Further, if the size of the device is further reduced, the air cylinder force is insufficient.
- the retarder of the present invention aims to reduce the required force when switching between braking on and braking off at the lowest possible cost while reducing the number of parts and further reducing the size of the device. It was made.
- the retarder of the present invention In the single row swirl type retarder having the configuration shown in FIG. 10 or the disc type retarder having the configuration shown in FIG.
- a plurality of pole pieces are notched on the front end side in the turning direction of the magnet support member when switching from braking off to braking on and facing the permanent magnet.
- the main feature is that it has a department.
- the plurality of pole pieces are opposed to the permanent magnet on the front end side in the turning movement direction of the magnet support member when switching from braking off to braking on. Since the notch is provided on the side, the flow of the magnetic flux from the permanent magnet to the pole piece for each or the same pole changes. This makes it possible to reduce the required force when switching between braking on and braking off by changing the peak position of the attractive force and repulsive force acting between the permanent magnet and pole piece for each or different poles. It becomes.
- a plurality of pole pieces are arranged on the front end side of the turning direction of the magnet support member when switching from braking off to braking on and on the side facing the permanent magnet.
- (A)-(d) is a figure explaining the example of the shape of the pole piece employ
- the paper surface right side is the perspective view seen from the front lower direction of the circumferential direction
- (E) is the figure which looked at the example of the combination of the pole piece to employ
- (A) is an operation required force required for switching from braking off to braking on by rotation in the direction opposite to the rotation direction of the brake drum (hereinafter simply referred to as reverse direction) in the case shown in FIG.
- required by numerical analysis, (b) is a figure similar to (a) in the case shown in FIG.3 (b).
- FIG. 4 is a view similar to FIG. 3 when the brake drum rotates in the same direction (hereinafter referred to as a forward direction). It is the same figure as Fig.2 (a) at the time of rotation of a forward direction.
- An angle formed by a straight line connecting the front and rear ends on the inner peripheral side of the pole piece when the notch portion is not provided from the axis center of the rotation shaft when viewed from the cross-sectional direction of the rotation shaft (hereinafter referred to as the pole piece) Angle)) divided by the angle formed by the straight line connecting the front and rear ends of the permanent magnet at the position facing the pole piece (hereinafter referred to as magnet angle), the required operating force ratio and the braking torque. It is the figure which showed the relationship of ratio / magnetic leakage torque ratio.
- FIG. 10 It is a figure explaining the conventional drum type retarder of a single row turning system, (a) is sectional drawing of a rotating shaft direction, (b) is explanatory drawing of the magnetic circuit structure at the time of braking, (c) is at the time of non-braking It is explanatory drawing of a magnetic circuit structure. It is a figure similar to FIG. 10 explaining the conventional disc type retarder. It is a figure which shows the moving direction of a magnet support member and the shape of a pole piece in the conventional retarder of a single row turning system, (a) shows the time of forward rotation, (b) shows the time of reverse rotation.
- An object of the present invention is to reduce the required operating force when switching between braking on and braking off at as low a cost as possible without increasing the number of parts and further reducing the size of the device. To do.
- the object is to provide notches on the front end side of the plurality of pole pieces in the turning direction of the magnet support member and on the side facing the permanent magnet of the group of pole pieces arranged in the circumferential direction. Realized by.
- FIG. 12 is a view showing the moving direction of the magnet support member 4 in the conventional retarder of the single row swivel type using the pole piece 5 having the shape shown in FIG.
- FIG. 14 shows an operation necessary for switching between braking-on and braking-off in the case of applying the technique proposed by the applicant in Patent Document 4 in the conventional retarder of the single-row turning system shown in FIG. It is the figure which showed the result of having calculated
- FIG. 14 is a diagram corresponding to FIG. 6 of Patent Document 4, and a result equivalent to that of the single-row swirl type retarder shown by the solid line in FIG. 6 of Patent Document 4 is obtained.
- the demagnetizing field accompanying the eddy current generated in the braking drum and the magnetic field from the permanent magnet repel each other when switching from braking-off to braking-on. Since a force to push the permanent magnet is applied, it can be confirmed that the force by the air cylinder may be small.
- the inventors have suppressed the peak by dispersing the flow of magnetic flux between the permanent magnet and the pole piece, which is the source of the required operating force when switching from braking off to braking on of the permanent magnet type retarder. Repeated examination.
- an air cylinder that satisfies the specified push / pull force and can be reduced in cost and size can be adopted. This is because the weight and weight can be reduced.
- FIGS. 1A to 1D show examples of notches provided on the pole piece on the front end side in the turning direction of the magnet support member when switching from braking off to braking on and on the side facing the permanent magnet. .
- FIG. 1 (a) to 1 (c) are examples in which a notch 5a having the same cross section is provided in the axial direction of the rotating shaft, (a) the cross section is rectangular, and (b) the cross section is cross section. Is a triangular shape, and FIG. 6C shows an example in which the cross section is an arc shape.
- FIG. 1 (d) shows an example in which a notch 5a having a rectangular cross section is provided in the axial direction of the rotation axis.
- the notch 5a provided at the position of the pole piece 5 is braked as compared to the conventional shape shown in FIG.
- the required operating force is reduced when switching from off to braking on.
- FIG. 2 is a diagram showing the result of obtaining the required operating force required when switching from braking-off to braking-on by rotating in the reverse direction under the same conditions as in FIG. 14 (b).
- (a) shows the case where the pole pieces 5 provided with the notches 5a shown in FIG. 1 (a) and the pole pieces 5 shown in FIG. 13 without the notches are alternately arranged. (See FIG. 3A).
- FIG. 3B shows the case where the pole piece 5 provided with the notch 5a shown in FIG. 1A is arranged all around (see FIG. 3B).
- FIG. 2 (b) in which the pole piece 5 provided with the notch 5a is arranged around the entire circumference is different from the pole piece 5 provided with the notch 5a.
- the required force for operation is smaller than that of FIG. 2A in which the pole pieces 5 not provided with the notches are alternately arranged.
- FIG. 6 is a diagram showing the result of obtaining the required operating force required for switching from braking-off to braking-on by forward rotation under the same conditions as in FIG. 14 (a), and provided with a notch 5a. This is a case where the pole pieces 5 and the pole pieces 5 not provided with notches are alternately arranged (see FIG. 5A).
- FIG. 7A is a diagram showing the result of calculating the required force required for switching from braking-off to braking-on by forward rotation by numerical analysis
- FIG. 7B shows braking from braking-on by reverse rotation. It is the figure which showed the result of having calculated
- the required operating force when switching from braking on to braking off by reverse rotation is the position where braking is off in the case of the minimum number of revolutions (0 rpm) among the numerical analysis. It turns out that it becomes the maximum.
- the inventors calculated the maximum required operating force at the time of switching from braking off to braking on and switching from braking on to braking off by dividing the pole piece angle ⁇ 1 by the magnet angle ⁇ 2 (hereinafter referred to as ( The pole piece angle / magnet angle) ratio (see FIG. 8) was changed and obtained by numerical analysis.
- the inventors obtained the maximum braking torque and magnetic leakage torque when the rotational speed is 3600 rpm (see FIG. 4) by numerical analysis by changing the (pole piece angle / magnet angle) ratio.
- FIG. 9 shows the relationship between the required operating force, braking torque, magnetic leakage torque, and (pole piece angle / magnet angle) ratio.
- the (pole piece angle / magnet angle) ratio is in the range of 1.047 to 1.13, the operation at the time of switching from braking off to braking on and the switching from braking on to braking off is performed. It can be seen that a reduction in braking torque can be reduced with a small magnetic leakage torque while balancing the required force.
- FIG. 2 The results shown in FIG. 2, FIG. 4, FIG. 6, FIG. 7, FIG. 9 and FIG. 14 are obtained when 32 permanent magnets are installed in the circumferential direction. A similar tendency is obtained in the range of 16 to 48.
- the notches 5a formed in the pole piece 5 may all have the same shape as in the example described above. However, as shown in FIG. 1 (e), for example, the similarity increases in order in the circumferential direction. It may be a shape. Further, the combination shown in FIG. 1E may be repeated.
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- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
Description
図10に示した構成の単列旋回方式のリターダ、或いは、図11に示した構成のディスク型のリターダにおいて、
円周方向に配置した前記ポールピース群の内、複数のポールピースの、制動オフから制動オンに切り替える際の磁石支持部材の旋回移動方向前端部側でかつ永久磁石と相対する側に、切欠き部を設けたことを最も主要な特徴としている。 The retarder of the present invention
In the single row swirl type retarder having the configuration shown in FIG. 10 or the disc type retarder having the configuration shown in FIG.
Of the plurality of pole piece groups arranged in the circumferential direction, a plurality of pole pieces are notched on the front end side in the turning direction of the magnet support member when switching from braking off to braking on and facing the permanent magnet. The main feature is that it has a department.
2 制動ドラム
3 永久磁石
4 磁石支持部材
5 ポールピース
6 支持体
6a 支持部材
7 制動ディスク
7a 主面 DESCRIPTION OF
Claims (5)
- 回転軸に一体的に取り付けた制動ドラムと、
この制動ドラムに対向して支持され、制動ドラムの円周方向に磁極の向きが互いに逆向きとなるよう、一定の間隔を存して永久磁石を配置した強磁性体の磁石支持部材と、
前記永久磁石群と前記制動ドラムとの間に、これら永久磁石と基本的には同じ角度位置に配置した強磁性体のポールピース群を、このポールピース群の各ポールピース間に設けた非磁性体の支持部材を介在させて設置した支持体を備え、
前記磁石支持部材を所要角度、回転軸を中心とする円周方向の旋回移動可能に構成した単列旋回方式の渦電流式減速装置、
或いは、
回転軸に一体的に取り付けた制動ディスクと、
この制動ディスクの主面と対向すべく設けられ、制動ディスクの円周方向に磁極の向きが互いに逆向きとなるよう、一定の間隔を存して永久磁石を配置した強磁性の磁石支持部材と、
前記制動ディスクと前記永久磁石群との間に、これら永久磁石と基本的には同じ角度位置に配置した強磁性体のポールピース群を、このポールピース群の各ポールピース間に設けた非磁性体の支持部材を介在させて設置した支持体を備え、
前記磁石支持部材を所定角度、回転軸を中心とする円周方向の旋回移動可能に構成したディスク型の渦電流式減速装置、
において、
円周方向に配置された前記ポールピース群の内、複数のポールピースの、制動オフから制動オンに切り替える際の磁石支持部材の旋回移動方向前端部側でかつ永久磁石と相対する側に、切欠き部を設けたことを特徴とする渦電流式減速装置。 A braking drum integrally attached to the rotating shaft;
A ferromagnetic magnet support member that is supported opposite to the brake drum and has permanent magnets arranged at a certain interval so that the magnetic poles are opposite to each other in the circumferential direction of the brake drum,
A non-magnetic ferromagnetic pole piece group disposed between the permanent magnet group and the brake drum between each pole piece of the pole piece group. A support body installed with a body support member interposed therebetween,
Single-row swirl type eddy current reduction device configured to allow the magnet support member to swivel in the circumferential direction around the required angle and rotation axis,
Or
A braking disk integrally attached to the rotating shaft;
A ferromagnetic magnet support member provided so as to face the main surface of the brake disk and having permanent magnets arranged at a certain interval so that the magnetic poles are opposite to each other in the circumferential direction of the brake disk; ,
A non-magnetic ferromagnetic pole piece group disposed between the brake disk and the permanent magnet group between the pole pieces in the pole piece group. A support body installed with a body support member interposed therebetween,
A disk-type eddy current type decelerating device configured such that the magnet support member is pivotable in a circumferential direction around a predetermined angle and a rotation axis;
In
Of the group of pole pieces arranged in the circumferential direction, a plurality of pole pieces are cut on the front end side in the turning direction of the magnet support member when switching from braking off to braking on and on the side facing the permanent magnet. An eddy current type speed reducer characterized by providing a notch. - 複数のポールピースに設ける前記切欠き部が同一形状であることを特徴とする請求の範囲第1項に記載の渦電流式減速装置。 2. The eddy current type reduction device according to claim 1, wherein the notches provided in a plurality of pole pieces have the same shape.
- 複数のポールピースに設ける前記切欠き部が異なる形状であることを特徴とする請求の範囲第1項に記載の渦電流式減速装置。 2. The eddy current type reduction device according to claim 1, wherein the notch portions provided in the plurality of pole pieces have different shapes.
- 前記ポールピースは、前記切欠き部を有するものと、切欠き部を有しないものが交互に配置されていることを特徴とする請求の範囲第2項又は第3項に記載の渦電流式減速装置。 4. The eddy current type deceleration according to claim 2, wherein the pole piece has the notch portion and the pole piece that does not have the notch portion are alternately arranged. 5. apparatus.
- 回転軸の横断面方向から見た場合に、回転軸の軸中心から前記切欠き部を設けないとした場合のポールピースの内周側の前後端を結んだ直線がなす角度を、当該ポールピースと相対する位置の永久磁石の外周側の前後端を結んだ直線がなす角度で除した値が、1.047以上、1.13以下であることを特徴とする請求の範囲第1~4項の何れかに記載の渦電流式減速装置。 When viewed from the cross-sectional direction of the rotating shaft, the angle formed by the straight line connecting the front and rear ends on the inner peripheral side of the pole piece when the notch is not provided from the axial center of the rotating shaft The value obtained by dividing by the angle formed by the straight line connecting the front and rear ends of the outer peripheral side of the permanent magnet at a position opposite to is in a range from 1.047 to 1.13. The eddy current type reduction gear according to any one of the above.
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KR1020147027168A KR101653897B1 (en) | 2012-03-29 | 2013-03-28 | Eddy-current-type reduction gear |
CN201380015434.2A CN104205590B (en) | 2012-03-29 | 2013-03-28 | Eddy current type deceleration device |
JP2014508053A JP5825428B2 (en) | 2012-03-29 | 2013-03-28 | Eddy current reducer |
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JP2012-077727 | 2012-03-29 | ||
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JP2004035041A (en) * | 2002-07-02 | 2004-02-05 | Kao Corp | Container |
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2013
- 2013-03-28 KR KR1020147027168A patent/KR101653897B1/en active IP Right Grant
- 2013-03-28 JP JP2014508053A patent/JP5825428B2/en active Active
- 2013-03-28 CN CN201380015434.2A patent/CN104205590B/en active Active
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JP2004153925A (en) * | 2002-10-30 | 2004-05-27 | Sumitomo Metal Ind Ltd | Ferromagnetic plate and eddy current type reduction gear |
JP2004222405A (en) * | 2003-01-14 | 2004-08-05 | Sumitomo Metal Ind Ltd | Ferromagnetic plate and eddy current type reduction gear |
JP2004350411A (en) * | 2003-05-22 | 2004-12-09 | Isuzu Motors Ltd | Eddy current type reduction gear |
JP2007110804A (en) * | 2005-10-12 | 2007-04-26 | Isuzu Motors Ltd | Eddy current decelerator |
Also Published As
Publication number | Publication date |
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KR101653897B1 (en) | 2016-09-02 |
JPWO2013147073A1 (en) | 2015-12-14 |
KR20140141612A (en) | 2014-12-10 |
CN104205590A (en) | 2014-12-10 |
JP5825428B2 (en) | 2015-12-02 |
CN104205590B (en) | 2017-06-16 |
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