JP3224194B2 - Coating device for 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 rotor magnet coating apparatus for coating a rotor with 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] In this case, in order to securely press and hold the permanent magnet on the outer peripheral surface of the yoke, it is necessary to strongly adhere the cylindrical member to the permanent magnet. The diameter is set to be considerably smaller than the diameter. For this reason, the mounting operation of the cylindrical member, that is, the coating operation of the permanent magnet, becomes considerably complicated.

Therefore, as disclosed in Japanese Patent Application Laid-Open No. 7-336966, the rotor and the permanent magnet are inserted into the cylindrical member in a state where the diameter of the cylindrical member is forcibly expanded by fluid pressure. A method of discharging the fluid and covering the permanent magnet with the cylindrical member is known.

[0005]

By the way, in the above-mentioned prior art, first, as schematically shown in FIG. 16A, the rotor 2 and the permanent magnet 3 are supported by the holding jig 4 and the movable jig 5. The cylindrical member 6 is disposed in a casing 7, and the end of the cylindrical member 6 is clamped by an O-ring 8 mounted on the casing 7, the holding jig 4 and the movable jig 5.

Next, a fluid is supplied into the casing 7, and the rotor 2 and the permanent magnet 3 are integrated with the movable jig 5 while the cylindrical member 6 is expanded in diameter through the fluid pressure. Is inserted into.

At this time, as shown in FIG. 16B, when the movable jig 5 is inserted into the cylindrical member 6, the diameter of the cylindrical member 6 is reduced between the movable jig 5 and the holding jig 4. The cylindrical member 6 is pulled linearly between the claws 4a of the holding jig 4. For this reason, the permanent magnet 3 inserted into the cylindrical member 6 integrally with the movable jig 5 is in sliding contact with the linear portion of the cylindrical member 6, and the surface of the permanent magnet 3 and the cylindrical member 6 are damaged. Problem has been pointed out.

The present invention solves this kind of problem. When a permanent magnet is inserted into a cylindrical member, the cylindrical member and the permanent magnet are reliably prevented from slidingly contacting each other. An object of the present invention is to provide a rotor magnet coating apparatus capable of coating a magnet and efficiently mounting the cylindrical member.

[0009]

In order to solve the above-mentioned problems, the present invention provides a method in which a plurality of permanent magnets are provided on an outer periphery of the rotor , the permanent magnets being separated by a predetermined angular interval.
Coating of rotor magnet to cover and mount cylindrical member
An apparatus, wherein the permanent magnet is disposed on an outer periphery of the rotor.
An insertion groove for inserting a magnet is provided, and
Between the grooves, it is press-fitted into the insertion-side end of the cylindrical member.
The insertion side end has a diameter larger than the outer diameter of the opening of the insertion groove.
A holding jig provided with a claw portion for expanding the diameter;
Protrusions for positioning and supporting the end face and grooves corresponding to the claws
Parts are provided alternately with the rotor and the permanent magnet.
A movable jig inserted into the cylindrical member,
The protrusion projects radially outward of the movable jig,
Pressing into the insertion end of the cylindrical member integrally with the claw
The diameter of the cylindrical member is increased by the claws to be larger than the diameter of the cylindrical member.
A bulging portion is provided, and the bulging portion is
It is set to be smaller than the width of the projection, and
It has a peripheral surface .

Therefore, when the movable jig is inserted into the cylindrical member together with the rotor and the permanent magnet, the cylindrical member is further expanded outward by the bulging portion formed on the projection of the movable jig. Is done. This prevents the permanent magnet from slidingly contacting the cylindrical member whose diameter decreases from the protrusion to the claw portion of the holding jig, and reliably prevents the permanent magnet and the cylindrical member from being damaged, thereby preventing the permanent magnet from being damaged. The coating operation is performed smoothly and efficiently.

[0011]

FIG. 1 shows a motor 1 coated by a rotor magnet coating apparatus 30 according to an embodiment of the present invention.
0 shows an exploded perspective view. The motor 10 includes a stator core 14 on which three-phase windings 12a to 12c are mounted, and a rotor 16 rotatably disposed in a 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 spaced apart by a predetermined angle and juxtaposed 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, the coating apparatus 30 includes a movable jig 32 for positioning and supporting the end face 16a of the rotor 16.
And an insertion groove 34 for inserting the entire permanent magnet 26 disposed in the groove 24a of the rotor 16 is provided.
A holding jig 3 which is press-fitted into the insertion side end 28a of the cylindrical member 28 integrally with the movable jig 32 to expand the insertion side end 28a to a diameter larger than the outer diameter of the opening of the insertion groove 34.
6, with the rotor 16 and the permanent magnet 26 engaged with the movable jig 32, the movable jig 32 is connected to the rotor 16 and the permanent magnet 26 under the guiding action of the holding jig 36. A pressing means 38 for integrally inserting the cylindrical member 28 into the cylindrical member 28.

The movable jig 32 has a substantially disk shape.
It has an engagement surface 40 on which the end face 16a of the rotor 16 is placed, and a plurality of protrusions 42 provided corresponding to each permanent magnet 26, and a groove 44 is formed between the protrusions 42. A bulged portion 45 having a diameter set to increase the diameter of the cylindrical member 28 to a diameter larger than the diameter of the cylindrical member 28 expanded by the holding jig 36 is formed in the protrusion 42. This bulge 45
It is set smaller than the width dimension of the projection 42 and has an arc-shaped outer peripheral surface.

The holding jig 36 has a substantially cylindrical shape having an axial length corresponding to the length of the permanent magnet 26, and communicates with a through hole 46 in which the rotor 16 is provided. Are formed. At the lower end of the holding jig 36, a plurality of divided claws 48 are provided. The claw portion 48 is fitted into the groove portion 44 of the movable jig 32 to increase the diameter of the cylindrical member 28 to be larger than the outer diameter of the opening of the insertion groove 34 integrally with the protrusion portion 42.
The diameter is set so as to be located inward of the second bulging portion 45 (see FIGS. 3 and 4).

A fixing means 50 is attached to the outer peripheral edge of the holding jig 36.
Is provided. The fixing means 50 includes a plurality of pin members 52 fixed to the holding jig 36 and a locking piece 54 rotatably disposed around the pin member 52. The locking piece 54 is substantially It is formed in a semicircular shape.

As shown in FIG. 5 to FIG.
Is an inner peripheral surface 60 in which a gap H is formed between the cylindrical member 28 and the outer peripheral surface thereof.
A first casing member 62 having a first casing member 62, a second casing member 64 movable relative to the first casing member 62, the first casing member 62 and the second casing member 64, 28 and rotor 1
Clamping means 66 for accommodating and sealingly sealing 6
And fluid supply means 68 for expanding the diameter of the cylindrical member 28 by pressing the cylindrical member 28 against the inner peripheral surface 60 via hydraulic pressure.

The first casing member 62 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). ). An escape 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 outward. A ring-shaped support portion 80 for arranging 79 is provided.

At the lower end side of the first casing member 62, a fluid passage 82 constituting the fluid supply means 68 is formed in the horizontal direction, and the other end of a conduit 84 connected to this fluid passage 82 at one end. Are connected to a hydraulic pump 88 controlled by a controller 86 (see FIG. 5). Fluid passage 8
2 communicates with the inside of the first casing member 62 through a hole 90, in which a lower set member 92 constituting the pressing means 38 is held in a liquid-tight manner via an O-ring 93. In this state, it is slidably inserted (see FIG. 7).

The lower set member 92 has a substantially columnar 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.

The second casing member 64 is held by a swing unit to be described later and is formed in a substantially cylindrical shape having a bottom with an opening 99 at its lower end. A flange 100 is provided. An upper set member 102 constituting the pressing means 38 is slidably inserted into the upper end side of the second casing member 64 via an O-ring 103 (see FIG. 10) while being held in a liquid-tight manner. The upper set member 102 is connected to a rod 106 extending downward from a press-fit cylinder 104 mounted on a swing unit (described later).

At the lower end of the upper set member 102, an uneven large diameter portion 108 is provided (see FIGS. 6 and 10).
The large diameter portion 108 is engaged with the upper end surface of the second casing member 64 to hold the second casing member 64.
The press-fit cylinder 104 is connected to the hydraulic pump 88 via conduits 109a and 109b (see FIG. 5).

The clamp means 66 includes a plurality of cylinders 110 fixed to the base 70, and a clamp member 114 is connected to a rod 112 extending from each cylinder 110 toward the center of the first casing member 62. A grip portion 116 is provided at the tip of the clamp member 114,
The first and second casing members 62 and 64 are fixed in a liquid-tight manner by the gripping portion 116 integrally holding the flange portion 78 of the first casing member 62 and the flange portion 100 of the second casing member 64. You.

In FIG. 5, the conveying means indicated by reference numeral 120 includes an elevating cylinder 122, which is connected to the controller 86 via pipes 124a and 124b. A rod 126 extending upward from the lifting cylinder 122 is connected to a guide rod 128, and a guide cylinder 129 for guiding the guide rod 128 so as to be able to move up and down is fixed to the base 70. Guide rod 1
28, a swing unit 130 is arranged to be able to swing freely, and the upper end of the guide rod 128 is attached to the mounting member 13.
The turning motor 134 is fixed via the second motor 2. The first gear 13 is attached to a rotating shaft 136 projecting downward from the turning motor 134.
8 is fixed, and the first gear 138 is
The second gear 140 meshes with the large-diameter second gear 140 provided on the second gear 30.

The turning unit 130 is provided with a first mounting portion 142 and a second mounting portion 144 separated from each other by a predetermined angle, and the press-fitting cylinder 104 constituting the pressing means 38 is provided on the first mounting portion 142 in a downward direction. Fixed towards.
A jig transport support rod 146 is provided on the second mounting portion 144 downward, and a large-diameter portion 148 is formed at a lower end of the support rod 146. The support rod 146 has
The holding jig 36 and the movable jig 32 are detachably held.

Next, the coating apparatus 30 constructed as described above
Will be described.

First, as shown in FIG. 7, with the lower set member 92 raised, the cylindrical member 28 is disposed with a gap H formed between the cylindrical member 28 and the inner peripheral surface 60 of the first casing member 62. After that, the holding jig 36 and the movable jig 32 are integrally transferred via the transfer means 120. At that time, the holding jig 3
6 is a large diameter portion 14 of the support rod 146
8 and the claw portion 48 of the holding jig 36.
Are fitted in the grooves 44 of the movable jig 32, and the movable jig 32 is held by the holding jig 36 by the frictional force.

Then, under the action of the swing motor 134, the first
And the turning unit 1 via the second gears 138, 140
The support rod 146 is arranged coaxially with the first casing member 62 by rotating the 30 by a predetermined angle. Then
The elevating cylinder 122 is driven, the guide rod 128 is lowered integrally with the rod 126, and the projection 42 and the claw 48 of the movable jig 32 and the holding jig 36 held by the support rod 146 move the cylindrical member 28. The diameter is increased and inserted into the end 28a of the cylindrical member 28 (see FIG. 8).

Then, the locking piece 54 is rotated to engage with the projection 74 of the first casing member 62, and the locking piece 54 is moved from the large-diameter portion 148 of the support rod 146. break away. As a result, the holding jig 36 is held by the first casing member 62, and the movable jig 3
2 is placed on the large diameter portion 94 of the lower set member 92, and the support rod 1
Only 46 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 46 and the insertion groove 34 of the holding jig 36. For this reason, the rotor 16
The end surface 16a of the movable jig 32 is positioned and supported on the engaging surface 40 of the movable jig 32, and each permanent magnet 26 is placed corresponding to each projection 42 of the movable jig 32 (see FIG. 10). .

Next, after the second casing member 64 is disposed above the first casing member 62 via the turning motor 134, the second casing member 64 is lowered under the action of the elevating cylinder 122 to engage with the first casing member 62. I do. For this reason,
The flange portion 78 of the first casing member 62 and the flange portion 100 of the second casing member 64 are in contact with each other, and the grip portion 116 provided at the tip of each clamp member 114 under the action of each cylinder 110 constituting the clamp means 66. The flange portions 78 and 100 are integrally held. Thereby, the first casing member 62 and the second casing member 64
Are hermetically connected.

Next, as shown in FIG. 11, when pressure oil is supplied to the fluid passage 82 constituting the fluid supply means 68, the pressure oil is introduced into the first casing member 62 from the hole 90. You. Therefore, the cylindrical member 28 provided on the first casing member 62 is pressed and held by the inner peripheral surface 60, and is forcibly expanded in accordance with the gap H.

With the cylindrical member 28 expanded, the press-fit cylinder 104 is driven while the push-up cylinder 96 is driven.
Is driven downward or extinguished. For this reason, the upper set member 102 connected to the rod 106 is lowered,
The large diameter portion 108 of the upper set member 102 is
And the plurality of permanent magnets 26 are pressed integrally downward.
The rotor 16 and the permanent magnet 26 are placed on a movable jig 32, and are inserted into a cylindrical member 28 which is integrally lowered with the movable jig 32 and held in a large diameter. At that time, the excess pressure oil in the first casing member 62 is removed from the gap between the rotor 16 and the holding jig 36 by the second casing member 64.
Derived to the side.

In this case, in this embodiment, the movable jig 32
Has a bulging portion 45 protruding outward from the claw portion 48 of the holding jig 36. Therefore, as shown in FIG. 4, when the movable jig 32 is inserted into the cylindrical member 28 together with the rotor 16 and the permanent magnet 26, the bulging portion 45 formed on the projection 42 of the movable jig 32 is formed. As a result, the diameter of the cylindrical member 28 is further expanded outward.

As a result, as shown in FIGS. 3 and 4, the cylindrical member 28 whose diameter is reduced from the projection 42 toward the claw 48 of the holding jig 36 does not come into sliding contact with the permanent magnet 26. Therefore, the permanent magnet 26 and the cylindrical member 28 can be reliably prevented from being damaged, and the effect of coating the permanent magnet 26 smoothly and efficiently can be obtained.

As shown in FIG. 12, after the operation of inserting the rotor 16 and the permanent magnet 26 into the cylindrical member 28 is completed, the inside of the first casing member 62 through the fluid passage 82 constituting the fluid supply means 68 is provided. The pressure oil is returned to the hydraulic pump 88 side. Thus, the pressure in the first casing member 62 is reduced to the atmospheric pressure, the diameter of the cylindrical member 28 is reduced, and the permanent magnet 26 is covered with the cylindrical member 28. Next, the clamp member 114 is separated from the first and second casing members 62 and 64 under the action of the clamp means 66, and the second casing member 64 is further raised via the elevating cylinder 122.

Therefore, as shown in FIG.
The support rod 146 which constitutes 20 is disposed on the first casing member 62, and the locking piece 54 is rotated to hold the holding jig 36.
Is held by this support rod 146. Then, the support rod 146 is raised integrally with the holding jig 36, and
After being separated from the casing member 62, the lower set member 92 is raised integrally with the rotor 16 under the action of the push-up cylinder 96 (see FIG. 14), and the rotor 16 is taken out of the first casing member 62.

Further, as shown in FIG.
Extra ends of the cylindrical member 28 extending outward from both ends of the rotor 16 are cut off, and the movable jig 32 is
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.

[0040]

In the rotor magnet coating apparatus according to the present invention, since the protrusion provided on the movable jig is formed with a bulge projecting outward from the claw of the holding jig. When the movable jig is inserted into the cylindrical member together with the rotor and the permanent magnet, the diameter of the cylindrical member is further expanded outward by the bulging portion of the projection. With this configuration, the permanent magnet does not slidably contact the cylindrical member whose diameter is reduced from the protrusion to the claw portion of the holding jig, and the permanent magnet and the cylindrical member are reliably prevented from being damaged with a simple configuration. Thus, the operation of coating the permanent magnet is performed smoothly and efficiently.

[Brief description of the drawings]

FIG. 1 is an exploded explanatory view showing a schematic configuration of a motor incorporating a rotor covered by a covering device according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a main configuration of the coating apparatus.

FIG. 3 is a partial cross-sectional plan view of a holding jig and a movable jig that constitute the coating apparatus.

FIG. 4 is a partial longitudinal sectional view for explaining the operation of the holding jig and the movable jig.

FIG. 5 is an explanatory perspective view of the coating apparatus.

FIG. 6 is a front view of the coating apparatus.

FIG. 7 is an explanatory view of a state in which a cylindrical member is provided on a 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 view showing a state where a rotor and a permanent magnet are disposed on the first casing member.

FIG. 10 is an explanatory view showing a state in which the rotor and the permanent magnet are disposed in 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 press-fitting operation of the rotor is completed.

FIG. 13 is an explanatory diagram when a holding jig is detached from the first casing member.

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.

FIG. 16 is an explanatory view of a coating apparatus according to the related art; FIG. 16A is a partial longitudinal sectional view of the coating apparatus according to the related art; and FIG. 16B is a part of the coating apparatus according to the related art. It is a plane explanatory view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Motor 16 ... Rotor 24a ... Groove part 26 ... Permanent magnet 28 ... Cylindrical member 30 ... Coating device 34 ... Insertion groove 36 ... Holding jig 38 ... Pressing means 40 ... Engaging surface 42 ... Projection part 45 ... Swelling part 62, 64 casing member 66 clamping means 68 fluid supply means

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-336965 (JP, A) JP-A-7-336966 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02K 15/03 H02K 1/27

Claims (1)

(57) [Claims] An apparatus for coating a rotor magnet for coating a rotor having a plurality of permanent magnets disposed on an outer periphery thereof at predetermined angular intervals and covering the permanent magnet with a cylindrical member. An insertion groove for inserting the permanent magnet disposed on the outer periphery of the rotor is provided, and between the insertion grooves, the insertion side end of the cylindrical member is press-fitted to insert the insertion side end. A holding jig provided with a claw for expanding the diameter to be larger than the outer diameter of the opening of the groove; a protrusion for positioning and supporting the end surface of the rotor; and a groove corresponding to the claw are provided alternately. comprising a movable jig to be inserted into data and the permanent magnet integrally with the cylindrical member, the protruding portion protrudes radially outward of the movable jig,
Pressed into the insertion-side end of the cylindrical member integrally with the claw portion
To expand the diameter of the cylindrical member to a diameter larger than the diameter of the cylindrical member.
A swelling portion is provided to reduce the diameter, and the swelling portion is set to be smaller than a width dimension of the protrusion.
A magnet coating device for a rotor, wherein the coating device has a circular arc-shaped outer peripheral surface .