JP3194864B2 - Method and apparatus for coating rotor magnet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for coating a rotor magnet for coating a permanent magnet and mounting a cylindrical member on the rotor.

[0002]

2. Description of the Related Art In general, a motor includes a stator core (stator core) provided with windings corresponding to a predetermined number of phases;
And a rotor provided with a plurality of permanent magnets on the outer peripheral surface and rotatably disposed in the stator core. This type of rotor usually includes a shaft (rotating shaft) and a yoke, and a plurality of permanent magnets are arranged on the outer peripheral surface of the yoke at a predetermined angle, and the permanent magnet is
It is pressed and held on the outer peripheral surface of the yoke by being covered with a cylindrical member made of fiber reinforced resin.

[0003]

Incidentally, the above-mentioned cylindrical member often has variations in mechanical strength characteristics. For this reason, with a cylindrical member having the property of easily expanding at a predetermined pressure, it is not possible to secure a tightening force necessary to prevent the permanent magnet from floating from the rotor. On the other hand, in the case of a cylindrical member having a characteristic that it is difficult to expand at a predetermined pressure,
A permanent magnet cannot be inserted into this cylindrical member, and even if the cylindrical member can be covered, cracks may occur in the cylindrical member due to centrifugal force generated when the rotor rotates when actually used as a motor. The problem of being formed has been pointed out.

SUMMARY OF THE INVENTION The present invention solves this kind of problem. In this invention, a permanent magnet disposed on the outer periphery of a rotor is reliably and efficiently coated with a cylindrical member having a predetermined tightening force. It is an object of the present invention to provide a method and an apparatus for coating a magnet for a rotor, which can easily achieve a high efficiency.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a method of manufacturing a cylindrical member in which a diameter of a cylindrical member is expanded by a fluid having a predetermined pressure. Is measured, the measured displacement amount and the cylindrical portion
Based on the fluid pressure acting on the timber, when the cylindrical member is determined to be good, the rotor is inserted into the cylindrical member. On the other hand, when it is determined that the cylindrical member is defective , the diameter expanding step of the cylindrical member is stopped.

For this reason, only the cylindrical member having a predetermined tightening force can be selected and used for coating the permanent magnet, and the tightening force is insufficient, so that the permanent magnet floats from the outer periphery of the rotor or excessive tightening force. Is not applied, and the insertion failure of the permanent magnet does not occur.

[0007] The measuring means for measuring the displacement of the cylindrical member is provided with an advancing and retracting rotating body which slidably contacts the outer peripheral surface of the cylindrical member. Therefore, when the cylindrical member is mounted on the apparatus, the rotating body does not interfere with the cylindrical member, and the cylindrical member can be mounted smoothly.

[0008]

FIG. 1 is an exploded perspective view of a motor 10 covered by a rotor magnet coating method and apparatus according to an embodiment of the present invention. The motor 10 has a stator core 14 on which three-phase windings 12a to 12c are mounted.
And a rotor 16 rotatably disposed in the hollow portion 14a of the stator core 14.

The stator core 14 is formed by integrally laminating a plurality of laminated steel plates 18. On the inner peripheral surface of the stator core 14, a plurality of steel plates 18 for arranging the windings 12a to 12c are provided. Slots 20 are provided at predetermined angular intervals and arranged in parallel in the axial direction.

The rotor 16 includes a shaft 22 and a yoke 24.
Groove portions 24a are formed at predetermined intervals on the outer peripheral surface of the yoke 24, and the permanent magnet 2 is formed in each groove portion 24a.
6 are arranged. The cylindrical member 28 is mounted on the rotor 16 in a state where the cylindrical member 28 integrally covers the permanent magnet 26 via the coating device 30 according to the present embodiment. The cylindrical member 28 is formed by winding a fiber reinforced resin.

As shown in FIG. 2 and FIG.
Reference numeral 0 denotes a first casing member 34 having an inner peripheral surface 32 where a cylindrical member 28 is inserted and arranged and a predetermined gap is formed between the first casing member 34 and the outer peripheral surface of the cylindrical member 28. A second casing member 36 that is relatively movable with respect to the first casing member 34 and a clamping means 38 that couples the first casing member 34 and the second casing member 36 in a sealed state while accommodating the cylindrical member 28 and the rotor 16. Expanding means 40 for expanding the diameter of the cylindrical member 28 by pressing the cylindrical member 28 against the inner peripheral surface 32 via a predetermined hydraulic pressure (fluid pressure); and expanding the diameter of the cylindrical member 28. wherein by the measuring means 42 for measuring the displacement amount in the diameter direction, and the measured displacement amount cylindrical member 28
Good / bad determining means 44 for determining the quality of the cylindrical member 28 based on the hydraulic pressure acting on the rotor 16, and when the result of the determination is good, the rotor 16 is moved with the cylindrical member 28 expanded. Driving means 45 is provided for being inserted into the cylindrical member 28 integrally with the permanent magnet 26.

As shown in FIG. 4, the coating apparatus 30 includes a movable jig 46 for positioning and supporting the end face 16a of the rotor 16.
And an insertion groove 48 for inserting the entire permanent magnet 26 disposed in the groove 24a of the rotor 16 is provided.
A holding jig 5 which is press-fitted into the insertion end 28a of the cylindrical member 28 integrally with the movable jig 46 to expand the insertion end 28a to a diameter larger than the outer diameter of the opening of the insertion groove 48.
0.

The movable jig 46 has a substantially disk shape.
An engagement surface 52 on which the end surface 16a of the rotor 16 is mounted, and a plurality of first protrusions 54 provided corresponding to each permanent magnet 26
And a concave portion 56 is formed between the first protrusions 54. The diameter of the first protrusion 54 is set so as to expand the cylindrical member 28 to a diameter larger than the outer diameter of the opening of the insertion groove 48, and the tip of the first protrusion 54 has a tapered surface having a small diameter. 54a are formed.

The holding jig 50 has a substantially cylindrical shape having an axial length corresponding to the length of the permanent magnet 26, and communicates with a through hole 58 in which the rotor 16 is provided. Are formed. A plurality of divided second protrusions 60 are provided at the lower end of the holding jig 50. The second protrusion 60 fits into the recess 56 of the movable jig 46 and is integrally formed with the first protrusion 54 by the cylindrical member 2.
The diameter of the second projection 60 is set so as to increase the diameter of the second groove 8 to a diameter larger than the outer diameter of the opening of the insertion groove 48.

A fixing means 62 is attached to the outer peripheral edge of the holding jig 50.
Is provided. The fixing means 62 includes a plurality of pin members 64 fixed to the holding jig 50 and a locking piece 66 rotatably disposed about the pin member 64. The locking piece 66 is substantially It is formed in a semicircular shape.

The first casing member 34 is held on a base 70 and is formed in a substantially cylindrical shape with a bottom having an opening 72 above. A projection 74 is provided in the opening 72 (see FIG. 7). ). A clearance groove 76 is formed around the inner peripheral surface of the projection 74, and a locking flange 78 is provided on the lower end side of the projection 74 so as to protrude outwardly. A support 80 is provided.

At the lower end of the first casing member 34, a fluid passage 82 forming the diameter expanding means 40 in the horizontal direction is provided.
Is formed, and the other end of the conduit 84 having one end connected to the fluid passage 82 is connected to a hydraulic pump 88 controlled by a controller 86 (see FIG. 2). As shown in FIG. 7, the fluid passage 82 communicates with the inside of the first casing member 34 via a hole 90, and the driving means 4
5 is slidably inserted through an O-ring 93 while being held in a liquid-tight manner.

The lower set member 92 has a substantially cylindrical shape, and has a large-diameter portion 94 at the upper end. At the lower end of the lower set member 92, a push-up cylinder 96 is provided.
The push-up cylinder 96 is connected to a hydraulic pump 88 via conduits 97a and 97b (see FIG. 2).

As shown in FIG. 5, the measuring means 42
An equal angle (for example, 120
°) a plurality of holes 100 spaced apart by an interval and penetrating in the radial direction of the first casing member 34;
A cylindrical support member 102 inserted into the first casing member 34 and fixed to the side peripheral portion of the first casing member 34;
, A detection rod 106 protruding from the length measurement device 104 toward the center of the first casing member 34 so as to freely advance and retreat, and a roller rotatably provided at the tip of the detection rod 106. Measuring element (rotating body) 1
08.

The length measuring device 104 is a magnescale,
The detection rod 106 is moved by an arrow A through an elastic member (not shown).
The length measuring device 10
4 is connected to the arithmetic unit 112 (FIG. 2).
reference). The calculation unit 112 calculates the amount of displacement of the cylindrical member 28 in the diameter direction detected by each length measuring device 104 as a distortion δ, and sends the calculation result to the pass / fail determination unit 44.

The pass / fail determination means 44 determines whether the calculated distortion δ is within a predetermined allowable range, and sends the determination result to the controller 86. Specifically, as shown in FIG. 6, when a predetermined hydraulic pressure P acts on the cylindrical member 28 via the diameter expanding means 40, the distortion δ of the cylindrical member 28 becomes δ.
If it is within the range of 1 to δ2, it is determined to be good.

The second casing member 36 is held by a revolving unit which will be described later, is formed in a substantially bottomed cylindrical shape having an opening 114 below, and has a lower end protruding outwardly for locking. A flange portion 116 is provided. An upper set member 118 constituting the driving means 45 is slidably inserted into the upper end side of the second casing member 36 in a state of being held in a liquid-tight manner via an O-ring 120 (see FIG. 10). The upper set member 118 is connected to a rod 124 extending downward from a press-fit cylinder 122 mounted on a swing unit (described later) (see FIGS. 2 and 3).

At the lower end of the upper set member 118, an uneven large diameter portion 126 is provided. The large diameter portion 126 is engaged with the upper end surface of the second casing member 36 to hold the second casing member 36. are doing. The press-fit cylinder 122 is connected to the hydraulic pump 88 via conduits 128a and 128b (see FIG. 2).

The clamp means 38 includes a plurality of cylinders 130 fixed to the base 70, and a clamp member 134 is connected to a rod 132 extending from each cylinder 130 toward the center of the first casing member 34. A grip 136 is provided at the tip of the clamp member 134,
The first and second casing members 34 and 36 are fixed in a liquid-tight manner by the grip portion 136 integrally holding the flange portion 78 of the first casing member 34 and the flange portion 116 of the second casing member 36. You.

In FIG. 2 and FIG.
Is provided with an elevating cylinder 142, and this elevating cylinder 142 is connected to the hydraulic pump 88 via conduits 144a and 144b. A rod 146 extending upward from the lifting cylinder 142 is connected to a guide rod 148, and a guide cylinder 149 that guides the guide rod 148 so as to be movable up and down is fixed to the base 70. The turning unit 150 is rotatably disposed on the guide rod 148, and a turning motor 154 is fixed to the upper end of the guide rod 148 via a mounting member 152. A first gear 158 is fixed to a rotating shaft 156 projecting downward from the swing motor 154, and the first gear 158 meshes with a large-diameter second gear 160 provided in the swing unit 150.

The turning unit 150 is provided with a first mounting portion 162 and a second mounting portion 164 separated from each other by a predetermined angle, and the press-fitting cylinder 122 constituting the driving means 45 is provided on the first mounting portion 162 in a downward direction. Fixed towards.
The second mounting portion 164 is provided with a support rod 166 for transferring the jig downward, and a large-diameter portion 168 is formed at a lower end of the support rod 166. The support rod 166 has
The holding jig 50 and the movable jig 46 are detachably held.

Next, the coating apparatus 30 constructed as described above
Will be described in relation to the coating method according to the present embodiment.

First, as shown in FIG. 7, with the lower set member 92 raised, the cylindrical member 28 is disposed with a gap formed between the cylindrical member 28 and the inner peripheral surface 32 of the first casing member 34. You.

In this case, as shown in FIG.
In each of the length measuring devices 104 constituting the detection rod 2, a detection rod 106 that can move back and forth in the direction of arrow A via an elastic member (not shown).
A rotatable roller probe 108 is attached to the tip of the roller. Therefore, the cylindrical member 28 is connected to the first casing member 34.
When the lower end of the cylindrical member 28 comes into contact with the roller measuring element 108, the roller measuring element 108 moves toward the length measuring device 104 (in the direction of arrow A1) while rotating (in FIG. 5, See the position of the solid line from the two-dot chain line). Therefore,
The cylindrical member 28 is smoothly and reliably connected to the first casing member 3.
4 can be obtained.

Next, the holding jig 50 and the movable jig 46 are integrally transferred via the transfer means 140. At this time, the holding jig 50 is held by the large-diameter portion 168 of the support rod 166 by the locking piece 66, and the second projection 60 of the holding jig 50 is fitted into the concave portion 56 of the movable jig 46. The movable jig 46 is held by the holding jig 50 by the frictional force.

Then, under the action of the swing motor 154, the first
And the turning unit 1 via the second gears 158 and 160
The support rod 166 is arranged coaxially with the first casing member 34 by pivoting 50 by a predetermined angle. Then
The elevating cylinder 142 is driven, the guide rod 148 descends integrally with the rod 146, and the first and second projections 54, 60 of the movable jig 46 and the holding jig 50 held by the support rod 166 are cylindrical. The member 28 is expanded in diameter and inserted into the end 28a of the cylindrical member 28 (see FIG. 8).

Then, the locking piece 66 is rotated so that the locking piece 66 is engaged with the projection 74 of the first casing member 34, and the locking piece 66 is moved from the large-diameter portion 168 of the support rod 166. break away. As a result, the holding jig 50 is held by the first casing member 34, and the movable jig 4
6 is placed on the large diameter portion 94 of the lower set member 92, and the support rod 1
Only 66 is raised.

As shown in FIG. 9, each groove 2 of the rotor 16
4a, the permanent magnet 26 is disposed,
6 and the permanent magnet 26 are integrally inserted into the through hole 58 and the insertion groove 48 of the holding jig 50. For this reason, the rotor 16
The end surface 16a is positioned and supported on the engagement surface 52 of the movable jig 46, and each permanent magnet 26 is placed corresponding to each first projection 54 of the movable jig 46.

Further, the second casing member 36 is disposed above the first casing member 34 via the turning motor 154 (see FIG. 10), and is further lowered by the action of the lifting / lowering cylinder 142, thereby lowering the first casing member. 34. For this reason, the flange portion 78 of the first casing member 34 and the flange portion 116 of the second casing member 36 abut against each other, and a grip provided at the tip of each clamp member 134 under the action of each cylinder 130 constituting the clamp means 38. A portion 136 integrally clamps the flange portions 78 and 116. Thereby, the first casing member 34 and the second casing member 36 are connected in a sealed state.

Next, as shown in FIG.
When the pressure oil is supplied to the fluid passage 82 that constitutes the pressure oil, the pressure oil is introduced into the first casing member 34 from the hole 90. Therefore, the cylindrical member 28 provided on the first casing member 34 is pressed and held by the inner peripheral surface 32, and the diameter is forcibly expanded.

As shown in FIG. 5, when a predetermined oil pressure P acts on the cylindrical member 28, the cylindrical member 28 is expanded in diameter and deformed in the direction of arrow A1. For this reason, the roller probe 108
Is pressed by the cylindrical member 28 and moves integrally with the detection rod 106 in the direction of the arrow A1, and the length measuring device 104 detects the amount of displacement of the cylindrical member 28.

The amount of displacement measured by each length measuring device 104 is sent to a calculation unit 112 via a cable 110, and the calculation unit 112 calculates a strain δ in the diameter direction of the cylindrical member 28. Further, the distortion δ calculated by the calculation unit 112
Is sent to the pass / fail determination means 44, and it is determined whether or not the distortion δ is within a predetermined allowable range (see FIG. 6), and the result is sent to the controller 86.

When it is determined that the result is good, the controller 86 drives the press-fit cylinder 122 while the cylindrical member 28 is expanded, while the push-up cylinder 9
6 is driven downward or extinguished. For this reason, the upper set member 118 connected to the rod 124 is lowered,
The large diameter portion 126 of the upper set member 118 is
And the plurality of permanent magnets 26 are pressed integrally downward.
The rotor 16 and the permanent magnet 26 descend integrally with the movable jig 46 and are inserted into the cylindrical member 28 whose diameter is maintained by hydraulic pressure (see FIG. 12). At that time, the first
Excess pressure oil in the casing member 34 is led to the second casing member 36 side from the gap between the rotor 16 and the holding jig 50.

After the operation of inserting the rotor 16 and the permanent magnet 26 into the cylindrical member 28 is completed, the pressure oil in the first casing member 34 is supplied to the hydraulic pump 88 via the fluid passage 82 constituting the diameter expanding means 40. Is returned to. As a result, the pressure in the first casing member 34 is reduced to the atmospheric pressure, and the diameter of the cylindrical member 28 is reduced.
6 is coated. Then, under the action of the clamping means 38, the clamping member 134 is
The second casing member 36 is moved up via the lifting cylinder 142 while being separated from the first and second casing members 36 and 36.

Therefore, as shown in FIG.
The support rod 166 constituting the first jig 40 is disposed on the first casing member 34, and the locking piece 66 is rotated to hold the holding jig 50.
Is held by this support rod 166. Then, the support rod 166 is raised integrally with the holding jig 50 and the first
After being separated from the casing member 34, the lower set member 92 is integrally raised with the rotor 16 under the action of the lifting cylinder 96 (see FIG. 14), and the rotor 16 is taken out of the first casing member 34.

Further, as shown in FIG.
An extra end of the cylindrical member 28 extending outward from both ends of the rotor 16 is cut off, and the movable jig 46
Be removed from. Thereby, the permanent magnet 2 of the rotor 16 is
The covering operation of the cylindrical member 28 with respect to 6 is completed.

In this case, in this embodiment, the cylindrical member 28
Is expanded by the fluid pressure under the action of the diameter expanding means 40, the amount of displacement in the diameter direction due to the diameter expansion of the cylindrical member 28 is measured by the length measuring device 104 constituting the measuring means 42. Then, the measurement result is sent to the calculation unit 112 to calculate the displacement amount of the cylindrical member 28.
At 4, the quality of the cylindrical member 28 is determined.

Here, the quality of the cylindrical member 28
Is determined to be good, the rotor 16 and the permanent magnet 26 are pressed under the action of the driving means 45 to push the cylindrical member 28
When the quality determining means 44 determines that the cylindrical member 28 is defective, the diameter expanding step of the cylindrical member 28 is stopped.

Therefore, only the cylindrical member 28 having a predetermined tightening force can be selected and used for the coating process of the permanent magnet 26.
Does not float from the outer periphery of the rotor 16 or an excessive tightening force is applied, thereby preventing the permanent magnet 26 from being poorly inserted. Thereby, the cylindrical member 2 having a predetermined tightening force is attached to the permanent magnet 26 disposed on the outer periphery of the rotor 16.
8 can be surely and efficiently coated, and an effect that the efficiency of the coating operation can be easily achieved can be obtained.

In the present embodiment, the fluid passage 82 constituting the diameter expanding means 40 is provided in the first casing member 34. However, the fluid passage 82 may be used instead of the fluid passage 82, or may be provided together with the fluid passage 82 in the second casing member. A fluid passage 82a (see a two-dot chain line in FIG. 2) may be provided on the member 36 side.

[0046]

According to the method and the apparatus for coating a magnet for a rotor according to the present invention, only a cylindrical member having a predetermined tightening force can be selected and used for coating a permanent magnet. There is no possibility that the magnet floats from the outer periphery of the rotor or that an excessive tightening force is applied, and the permanent magnet is not properly inserted. Thus, the permanent magnet disposed on the outer periphery of the rotor can be reliably and efficiently coated with the cylindrical member having the predetermined tightening force, and the efficiency of the coating operation can be easily increased.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a schematic configuration of a motor incorporating a rotor coated by a coating method and apparatus according to an embodiment of the present invention.

FIG. 2 is an explanatory perspective view of the coating apparatus.

FIG. 3 is a schematic side view of the coating apparatus.

FIG. 4 is an exploded perspective view of a movable jig, a holding jig, and the motor that constitute the coating apparatus.

FIG. 5 is a longitudinal sectional view of a measuring unit and a first casing member that constitute the coating apparatus.

FIG. 6 is an explanatory diagram of a permissible range determined by a pass / fail determination unit constituting the coating apparatus.

FIG. 7 is an explanatory view of a state in which a cylindrical member is disposed on the first casing member.

FIG. 8 is an explanatory view showing a state in which a holding jig and a movable jig are provided on the first casing member.

FIG. 9 is an explanatory diagram of a state immediately before a rotor and a permanent magnet are arranged on the first casing member.

FIG. 10 is an explanatory view showing a state where the rotor and the permanent magnet are disposed on the first casing member.

FIG. 11 is an explanatory view showing a state where a second casing member is connected to the first casing member and pressure oil is supplied.

FIG. 12 is an explanatory diagram of a state where the rotor is press-fitted.

FIG. 13 is an explanatory diagram of a state where the press-fitting of the rotor is completed.

FIG. 14 is an explanatory diagram when the coated rotor is taken out of the first casing member.

FIG. 15 is an explanatory view when an extra cylindrical member is cut from the rotor after coating.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Motor 16 ... Rotor 24a ... Groove part 26 ... Permanent magnet 28 ... Cylindrical member 30 ... Coating device 34, 36 ... Casing member 38 ... Clamping means 40 ... Diameter expanding means 42 ... Measuring means 44 ... Pass / fail judgment means 45 ... Driving means 46 .. Movable jig 50 holding jig 82 fluid passage 86 controller 88 hydraulic pump 102 support member 104 length measuring device 106 detection rod 108 roller measuring element 112 arithmetic unit

Continuation of front page (72) Inventor Mamoru Sasaki 1-10-1 Shinsayama, Sayama-shi, Saitama Honda Engineering Co., Ltd. (56) References JP-A-62-123943 (JP, A) JP-A-5-31630 ( JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02K 1/27 H02K 15/03

Claims (4)

(57) [Claims] 1. A rotor for mounting a cylindrical member on a rotor having a rotating shaft provided in the center and a plurality of permanent magnets arranged on an outer periphery thereof at a predetermined angular interval and covering the permanent magnet. a coating method of a magnet, a step of diameter of the cylindrical member by <br/> supplying a predetermined pressure of fluid inside the cylinder member, enlarged displacement in the diameter direction by the cylindrical member Measuring the amount of displacement, the measured amount of displacement and the flow acting on the cylindrical member.
Based on the pressure of the body, the step of determining the quality of the cylindrical member, when the judgment result is good, the state in which the cylindrical member is expanded, the rotor the permanent magnet and integrally A step of inserting the permanent magnet into the cylindrical member, and a step of coating the permanent magnet with the cylindrical member by discharging the fluid to reduce the diameter of the cylindrical member. Coating method. 2. The method according to claim 1, wherein the step of expanding the diameter of the cylindrical member is stopped when the result of the determination is negative. 3. A rotor for mounting a cylindrical member on a rotor having a rotating shaft provided at the center and a plurality of permanent magnets provided at an outer periphery thereof at a predetermined angular interval and covering the permanent magnet. a coating apparatus of a magnet, Tokoro inside the cylindrical member in order to increase the diameter of the cylindrical member
Expanding means for supplying a fluid at a constant pressure ; measuring means for measuring a diametrically changed position due to expanding the cylindrical member; and measuring the displacement and the flow acting on the cylindrical member.
Based on the pressure of the body, and acceptability determining means for determining acceptability of said cylindrical member, said determination when the result is good, in a state where the cylindrical member has an enlarged diameter, integral with the permanent magnet the rotor And a driving means for inserting the magnet into the cylindrical member. 4. A coating apparatus according to claim 3, wherein said measuring means comprises: a rotating body slidably in contact with an outer peripheral surface of said cylindrical member; and a diametrical direction of said cylindrical member based on a displacement of said rotating body. And a length measuring device for detecting a displacement amount of the magnet.