JP3332044B2 - Bearing motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel bearing motor in which a pulse motor drive mechanism and a bearing mechanism are structurally integrated, and is used for driving and supporting various rotary shafts. .

[0002]

2. Description of the Related Art Generally, a rotary drive shaft B of an OA device or a robot device is rotatably supported on a support member T by a bearing mechanism F as shown in FIG. Are driven to rotate at a predetermined speed. However, the configuration as shown in FIG. 13 requires a considerable space for installing the motor M, the transmission and deceleration mechanism C, and the like, and it is extremely difficult to reduce the size of the OA equipment and the robot equipment.

On the other hand, in order to solve the above-mentioned problem, a motor built-in type drive bearing device D has recently been developed in which a motor M and a bearing mechanism F are integrated and the number of revolutions is controlled by a drive installed outside. Then, as shown in FIG. 14, a method of directly connecting the drive bearing device D to the rotary drive shaft B is used.

FIG. 15 shows an example of a drive bearing device D with a built-in motor, in which a cylindrical stator S is disposed on both sides of a cylindrical rotor R and a brushless motor which does not use a permanent magnet. M, the cylindrical rotor R is rotatably supported by a high-load capacity bearing F, and the brushless motor M, the bearing H, and the like are compactly stored in a case K.

In the drive bearing device D with a built-in motor shown in FIG. 15, since the motor M and the bearing mechanism F are integrated, the space required for installing the drive unit is smaller than that in FIG. It can be considerably smaller. But,
The drive bearing device D with a built-in motor shown in FIG. 15 has a structure in which the motor M and the bearing mechanism F are simply housed integrally in the case K, and the components of the motor M and the bearing mechanism F It has not yet reached the stage of reducing the number of constituent members of the apparatus by sharing the constituent members of the present invention with each other. As a result, there is a certain limit to the miniaturization of the drive bearing device D, and it is not possible to greatly reduce the size and simplification of the device, and there is a problem that the manufacturing cost rises conversely.

A conventional drive bearing device with a built-in motor D
Are for heavy loads used for driving large robots and the like, and are not suitable for rotational driving of OA equipment with relatively light loads.

Further, a conventional drive bearing device with a built-in motor D
Since the rotational inertia of the cylindrical rotor R is large, the cylindrical rotor R lacks startup characteristics such as high speed and high acceleration, and the inner diameter of the cylindrical rotor R is considerably larger than the outer diameter of the drive rotary shaft B. Therefore, there is a disadvantage that the coupling mechanism between the drive rotary shaft B and the drive bearing device D becomes complicated.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem in the conventional motor-equipped drive bearing device D, namely, in terms of structure, the motor M and the bearing mechanism F are simply integrated into a case. Because they are only stored, there is a certain limit to downsizing and manufacturing cost reduction of the drive bearing device, and it is not possible to reduce the size and cost more drastically. -In addition to poor starting characteristics such as high acceleration, it is not suitable for light loads, the coupling mechanism between the drive bearing device and the rotary drive shaft becomes complicated, and the motor M
And a bearing mechanism F can not in sequence overlapped in the radial direction, by the center axis direction of the thickness of the bearing device D solves such problems increases, also serves as a constituent member of the motor and the bearing to each other and, An object of the present invention is to provide a completely new bearing motor (drive bearing device) for a light load, which is significantly reduced in size and weight and reduced in cost, and has excellent starting characteristics.

[0009]

The present invention has a circular flange shape having a thickness in which a spacer insertion hole 32 is provided at the center and an outer wall body 17 is provided at an outer peripheral end, and a thrust is provided on the upper and lower surfaces on the inner peripheral side. Circular ball rolling groove 3 forming a bearing
5 and 35, and circular main magnetic poles 11 and 11 formed by radially arranging a plurality of magnetic pole pieces on the outer upper surface and lower surface,
Further, the main stator 10 has coil insertion grooves 34, 34 on the upper and lower surfaces on the outer peripheral side, and has a circular flange shape provided with a drive shaft insertion hole through which an end of the rotary drive shaft B is inserted. The two ball rolling grooves 35 are arranged in opposition to the two ball rolling grooves 35 and form a thrust bearing at a position corresponding to the two ball rolling grooves 35.
9 and two guide plates 6, 6 and a short cylindrical shape,
The guide plate 6 is inserted into the spacer insertion hole 32 of the main stator 10 to support and fix the inner peripheral sides of the two guide plates 6 disposed opposite to each other at both ends thereof, and is also supported and fixed to the inserted rotation drive shaft B. The spacer 7, a plurality of balls 8, 8 inserted between the ball rolling grooves 35 of the main stator 10 and the ball rolling grooves 29 of the guide plates 6, and a circular flange shape;
On its outer peripheral side, there is provided a circular magnet body formed by radially arranging magnet pieces N times the number of magnetic poles of the main magnetic pole 11 in the up and down direction, and the magnet body is attached to the main stator 1.
And two permanent magnet plates 5, 5 whose inner peripheral sides are fixed to the respective guide plates 6, the upper surface of the outer peripheral side of the main stator 10, Two coils 4, 4 disposed in the coil insertion grooves 34, 34 formed on the lower surface and a circular flange shape, and the same number of pole pieces as the two main magnetic poles 11 are radially arranged on the inner surface thereof. The upper and lower surfaces of the main stator 10 are disposed in a state where each of the auxiliary magnetic poles 2 faces the main magnetic pole 11 and is located outside each of the coils 4 and the permanent magnet plates 5 in the thickness direction. A spacer 7, a ball 8, a main magnetic pole 11, an auxiliary magnetic pole 2, and a coil are provided from the center axis side of the rotation drive shaft B to the outside in the radial direction. The basic configuration of the present invention is that 4 are arranged in order. It is.

[0010]

The upper and lower permanent magnets 5, the two guide plates 6, and the spacers 7 make the rotor of the pulse motor a main stator 10 having upper and lower main magnetic poles 11, the coil 4 and the auxiliary magnetic pole 2. The upper and lower auxiliary stators 1 form the stator of the pulse motor, respectively. Further, the main stator 1
A thrust bearing mechanism is formed by the upper and lower surfaces of the inner periphery of the ball 0, the ball 8 and the two guide plates 6. By inputting a predetermined pulse input from a controller (not shown) to the coil 4 through the terminal member 15, the rotor of the pulse motor is rotated by a predetermined rotation angle (or continuously rotated at a predetermined rotation speed), The rotation drive shaft B inserted in the spacer 7 is rotationally driven by the spacer 7.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 are longitudinal sectional views of the bearing motor according to the present invention, showing the case where the positions of the cut surfaces are different as shown in FIG. FIG. 4 is an exploded perspective view of the present bearing motor.

1 to 4, A is a bearing motor, B is a rotary drive shaft, 1 is an auxiliary stator, 2 is an auxiliary magnetic pole, 3 is a chip holder, 4 is a coil, 5 is a permanent magnet plate, 6 Is a guide plate, 7 is a spacer, 8 is a ball, 9 is a retainer, 10 is a main stator, 11 is a main magnetic pole, 12 is a guide pin, 13 is an assembly bolt, 14 is a fixing bolt, and 15 is a terminal member.

The bearing motor A comprises a main flange 10 having a circular flange shape, upper and lower balls 8 disposed on both upper and lower surfaces on the inner peripheral side of the stator 10, and upper and lower balls for holding the balls 8 therebetween. A guide plate 6;
A flat plate-shaped upper and lower permanent magnet plate 5 disposed above and below the main stator 10, and an upper and lower auxiliary stator 1 disposed opposite to the permanent magnets. The upper and lower coils 4 and the like disposed above and below the outer peripheral side of the main stator 10 are integrally assembled.

That is, the main stator 10 and the two auxiliary stators 1
And both coils 4 form a stator of the stepping motor, and both permanent magnet plates 5, both guide plates 6 and spacers 7 form a rotor of the stepping motor. Further, a bearing mechanism is formed by both inner circumferential surfaces of the main stator 10, both guide plates 6, both balls 8 and the spacer 7, and the main constituent members of the motor and the bearing mechanism are commonly used.

As shown in FIGS. 5 and 8, the auxiliary stator 1 is formed of a high-permeability magnetic material (for example, soft iron or the like) in the shape of a circular cap, and has an insertion hole 16 for the drive shaft B at the center. Has been drilled. On the inner surface of the auxiliary stator 1, a circular auxiliary magnetic pole 2 in which 50 magnetic pole pieces are radially arranged at regular intervals is formed concentrically.
The space between the auxiliary magnetic pole 2 and the outer wall 17 is a space 18 for inserting the coil 4, and the inner part of the auxiliary magnetic pole 2 is a space 19 for inserting the chip holder 3. 5 and 8, reference numeral 12 denotes a guide pin, reference numeral 13 denotes an assembly bolt, reference numeral 20 denotes a guide pin insertion hole, reference numeral 21 denotes an assembly bolt insertion hole, reference numeral 22 denotes a lead wire drawing groove, and reference numeral 23 denotes fixing of the chip holder 3a. It is a pin insertion hole.

The auxiliary stator 1 is provided in two sets, one for the lower part and the other for the upper part. The upper and lower auxiliary stators 1 are substantially the same.

As shown in FIGS. 5 and 8, the chip holder 3 is formed in a flange shape from a liquid crystal polymer resin or the like, and a concave portion 24 for fitting an electronic chip member 26 is formed on the upper surface thereof. Is provided. A fixing pin 25 is formed on the lower surface of the chip holder 3, and the holder 3 is fixed to the auxiliary stator 1 by fitting the fixing pin 25 into the insertion hole 23. . 5 and 8, reference numeral 26 denotes an electronic chip member. Also,
Necessary wiring is provided between the concave portions 24 by a so-called surface plating method or a double molding method .

The chip holder 3 is a lower chip holder 3
And an upper chip holder 3 are provided, both of which fix substantially the same member or different electronic chip members.
A plurality of chip fitting recesses.

The coil 4 is formed by winding a lead wire a plurality of times into a ring having a rectangular cross section, and is inserted into the coil insertion space 18 of the auxiliary stator 1. Also, two coils 4 are prepared, and the lower coil 4
And the upper coil 4 are substantially the same.

The permanent magnet plate 5 is made of neodymium-iron-boro.
And pole pieces formed of ferromagnetic material such as samarium-cobalt type , and 100 pole pieces vertically magnetized in the order of NSNS are arranged radially at a predetermined pitch. Further, three engagement notches 27 are formed on the inner peripheral edge of the permanent magnet plate 5, and the notches 27 are formed as described later.
The engaging projection 28 provided on the outer surface side of the guide plate 6 is engaged. The outer diameter of the permanent magnet plate 5 and the plane shape of the pole piece are the same as the outer diameter of the auxiliary pole 2 and the plane shape of the pole piece. In the present embodiment, the number of pole pieces of the permanent magnet plate 5 is twice the number of pole pieces of the main stator 10 and the auxiliary stator 1, but the number of pole pieces can be set arbitrarily.

As the permanent magnet plate 5, two sets of an upper magnet plate 5 and a lower magnet plate 5 are prepared, and both are substantially the same. However, the upper magnet plate 5 is arranged at an electrical angle of π / 2 (1 .1) in the vertical direction with respect to the lower magnet plate 5 when the bearing motor A is assembled, as described later.
8 °).

As shown in FIGS. 6 and 7, the guide plate 6 is formed of a non-magnetic metal material such as stainless steel or a hard plastic or the like in the form of a flange. Are formed. Also, the guide plate 6
Is formed in a two-step shape on the outer surface side, and engages with a notch 27 for engagement of the magnet plate 5 at an inner high step portion fitted into the insertion hole of the permanent magnet plate 5. Engaging projection 28 is formed. 6 and 7, reference numeral 30 denotes an insertion hole for the fixing bolt 14, and reference numeral 31 denotes an insertion hole for a locking pin of the spacer 7 described later.

The guide plate 6 has two sets of an upper guide body 6 and a lower guide body 6, both of which are substantially the same.

The ball 8 is a so-called rolling ball, and a steel ball or a hard plastic ball is used. The retainer 9 holds the balls 8 at predetermined intervals, and is made of a hard plastic, a metal material, or the like. The ball 8 and the retainer 9 are 2
A set is prepared.

As shown in FIG. 7, the main stator 10 is formed of a highly magnetically permeable material such as soft iron into a substantially flange-like shape having a central portion provided with an insertion hole 32 for a spacer 7 to be described later.
An outer wall body 33, upper and lower main magnetic poles 11, a coil insertion groove 34, a ball rolling groove 35, and the like are provided. That is, an outer wall 33 having a predetermined height is integrally formed on the outer peripheral edge of the substantially flat circular base in the vertical direction. A coil insertion groove 34 having a rectangular cross section is formed in a ring shape on the upper surface and the lower surface on the outer side of the base, respectively, and the coil 4 is inserted therein. Further, main magnetic poles 11 having the same shape as the auxiliary magnetic poles of the auxiliary stator 1 are formed on the upper surface and the lower surface closer to the inside of the base. The ball rolling groove 35
Are formed on the inner peripheral edge of the base, and the rolling grooves 35
Needless to say, the outer surfaces are hardened by nitriding or the like. Further, near the inner side of the outer wall body 33 of the main stator 10, the lead wire drawing groove 22 of the auxiliary stator 1 is provided.
A vertical through-hole 40 is formed at a position corresponding to.

A pin insertion hole 36 for implanting the guide pin 12 and a bolt insertion hole 37 for inserting the assembly bolt are provided on the upper and lower end surfaces of the outer wall body 33 of the main stator 10, respectively. They are provided at equal angular pitches at different locations.

As shown in FIG. 7, the spacer 7 is a member for connecting the upper and lower guide plates 6 and for inserting and fixing the rotary drive shaft B. The spacer 7 is made of non-magnetic material such as stainless steel or hard synthetic resin material. The main stator 10 is formed into a cylindrical shape and is inserted into the spacer insertion hole 32 of the main stator 10.

As shown in FIG. 7, a screw hole 38 into which the fixing bolt 14 of the upper guide plate 6 is screwed, and a positioning pin which fits into the pin insertion hole 31 of the upper guide plate 6 are formed on the upper end surface of the spacer 7. 39 are formed.

Similarly, a screw hole 38 into which the fixing bolt 14 of the lower guide plate 6 is screwed is formed in the lower end surface of the spacer 7.
And a positioning pin 39 that fits into the pin insertion hole 31 of the lower guide plate 6. However, the screw hole 38 and the positioning pin 39 on the lower end face of the spacer are formed at a position deviated from the formation position of the screw hole 38 and the positioning pin 39 on the upper end face by an angle of 1.8 ° when viewed vertically. Thus, the phase difference between the upper and lower permanent magnet plates 5 fixed to the upper and lower ends of the spacer 7 is regulated so as to be the electrical angle π / 2.

Next, the assembly of the bearing motor A of the present invention will be described. 4 to 8, first, guide pins 12 are planted in pin insertion holes 20 of outer wall bodies 17 of two sets of auxiliary stators 1, respectively. Next, each auxiliary stator 1
The chip holder 3 is inserted into the inside, and the fixing pin 25 is fitted into the fixing pin insertion hole 23 and fixed. In addition, necessary lead wires and the like are drawn out to the outside through the drawing groove 22 and connected to each terminal member 15. Further, the chip holder 3 and the terminal member 1
The electrical connection between the wires 5 can be made by a method other than the lead wire, for example, using a printed lead.

Next, the coil 4 is inserted into the coil insertion groove 18, and a lead wire is drawn out through the drawing groove 22.

On the other hand, the chip holder 3 on the auxiliary stator 1
Apart from the mounting of the main stator 10, the upper guide pin 12 is implanted on the outer wall 33 of the main stator 10, and the spacer 7 is attached to the main stator 1.
0, into the spacer insertion hole 32, assemble the members in the order of the upper retainer 9, the upper ball 8, the upper guide plate 6, and the upper permanent magnet plate 5, and finally, fix the upper fixing bolts 14. By tightening, the upper guide plate 6 is fixed to the spacer 7.

Next, the main stator 10 is turned over, and the members are assembled in the order of the lower retainer 9, the lower ball 8, the lower guide plate 6, and the lower permanent magnet plate 5 in the same manner as described above, and the lower part is fixed. The lower guide plate 6 is fastened and fixed to the lower end surface of the spacer 7 by tightening the bolt 14.

Then, the guide pin 12 is inserted into the pin insertion hole 36, and the positioning pin 39 of the spacer 7 is inserted into the pin insertion hole 31 of the guide plate 6. By mating,
Assemble.

Similarly, after assembling the main stator 10 and the upper auxiliary stator 1 by inserting the guide pins 12 into the guide pin insertion holes 20, each assembly bolt 13 is tightened, and・ Fix the upper and lower auxiliary stator 1 to both lower surfaces.

In the present invention, the assembly of the main stator 10 and the upper and lower auxiliary stators 1, and the assembly of the spacer 7 and the upper and lower guide plates 6 are all performed by the guide pins 12 and the positioning pins 39. And so on, the positioning of each member can be performed extremely easily.

FIG. 9 shows the upper and lower main magnetic poles 1 of the main stator 10.
1 shows the positional relationship between the upper and lower permanent magnet plates 5 and the auxiliary magnetic poles 2 of the upper and lower auxiliary stators 1. The electrical angle between the upper and lower permanent magnet plates 5 is π / 2 (1.8). °) phase shift is provided. In this embodiment, the magnetic poles of the pulse motor are 50 poles, but the number of poles may be appropriately increased or decreased according to the controllability of the pulse motor.

FIG. 10 is a perspective view of the connection terminal member 15. The terminals are formed of a liquid crystal polymer resin, and are fitted and fixed in fitting notches 44 formed on the outer wall surface of each auxiliary stator 1. A plurality of through holes 45 are formed in the terminal member 15 in a horizontal direction, and so-called through-hole plating is applied to the inside thereof. Further, on both side surfaces of the terminal member 15, a plating pattern larger than the diameter of the through hole 45 and a wiring pattern 46 for connecting the through holes 45 to each other are formed. The electrical connection with 3 is made automatically by fitting the terminal member into the fitting notch 44.

FIG. 11 shows another embodiment of the present invention, and shows a so-called radial type bearing motor. In this embodiment, the spacer 7 is fixed to the rotation axis B.
And a ring shape on both end faces of the spacer 7
The guide plate 6 is screwed. Also, the rotation drive shaft B
The two guide plates 6 and the permanent magnet plates 5 form a rotor of the pulse motor.

FIG. 12 shows a third embodiment of the present invention, which is a kind of a so-called radial type bearing motor. In this embodiment, the end of the rotary drive shaft B
The step 47 is provided by expanding the diameter of the step.
The guide plate 6 is screwed. In addition, the extension
A ball rolling groove 41 is formed on the outer peripheral surface 47a of the
A ball rolling groove 43 is formed on the inner peripheral end surface of the main stator 10, and the rotary drive shaft B, the two guide plates 6, and the two permanent magnet plates 5 form a rotor of the pulse motor. The rotation drive shaft B is made of a non-magnetic material such as stainless steel.

Next, the operation of the present invention will be described. Referring to FIG. 1, the end of the rotary drive shaft B is inserted into the spacer 7 of the bearing motor A, and is supported and fixed thereto.
When a control input is applied from a controller (not shown) via the upper and lower terminal members 15, a pulse current flows into both coils 4, and the rotor composed of the permanent magnet plate 5, the guide plates 6, and the spacer 7 is driven. Then, similarly to a known pulse motor, the motor rotates according to the number and cycle of input pulses.

[0042]

According to the present invention, the guide plate 6 and the spacer 7 constituting the inner peripheral end of the main stator 10 constituting the stator of the stepping motor and the rotor are members constituting the bearing. Since they are shared, the number of components of the bearing motor can be reduced as compared with the conventional motor-equipped drive bearing device, so that the bearing motor can be significantly reduced in size and size and the manufacturing cost can be reduced.

In the present invention, the main stator 10
Since the members are assembled symmetrically above and below the center, the types of members constituting the bearing motor are greatly reduced, and the assembly becomes extremely simple.
Manufacturing costs can be reduced.

Further, in the present invention, the rotor is constituted by the flange-shaped upper / lower permanent magnet plate 5, the cylindrical spacer 7, the flange-shaped upper / lower guide plate 6, and the like. Rotational moment of inertia is reduced, high acceleration and responsiveness of speed control are obtained, and a motor bearing adapted to light load can be easily manufactured.

In addition, the electrical angle π
The positioning pins 39 are provided with an angle deviation of / 2, and the guide pins 6 are guided to fix each of the guide plates 6 supporting and fixing the permanent magnet plate 6 to the spacers 7. Can easily maintain the angle deviation of the electrical angle π / 2. As a result, the conditions required for the self-starting and reversible operation of the step motor can be realized very easily.
When press-fitting, the angle deviation does not go out of order.

In addition, the chip holder 3 is incorporated into each auxiliary stator 1 and the various chips 26 and the wiring between the coil 4 and the terminal member 15 attached to the chip holder 3 are all housed inside the step motor. And As a result, part or all of the drive circuit conventionally provided outside the step motor can be included in the motor bearing in a form very close to the bearing, and the size of the entire apparatus can be reduced.

In the present invention, since a part of the components of the motor M is used as a component of the bearing mechanism, no components other than the ball 8 and the retainer 9 are required at all, so that the manufacturing cost can be reduced and the center axis of the spacer 7 can be reduced. Each member is arranged in the order of the center diameter of the slide bearing mechanism, the center diameter of the permanent magnet 5, the center diameter of the coil 4, and the center diameter of the outer wall 17 of the main stator 10 outward (from the center axis of the shaft B). Therefore, a bearing motor in which the thickness dimension of the bearing motor in the axial direction is reduced and the ratio of the outer diameter to the inner diameter is selected to be large can be obtained.

In the present invention, since the terminal member is formed of a liquid crystal polymer resin and has a plurality of through-hole plated through-holes, a metal portion for connection from inside and outside is provided. There is no need for it, and the shape can be a shape without special projections. Further, since a plating pattern larger than the through hole diameter and a wiring pattern between the through holes are formed on both end surfaces of the terminal member, connection from inside and outside of the motor is facilitated.

[0049] Provide upper and lower through holes 40 in main stator 10
And the auxiliary stator groove 22 is provided,
Wires can be routed completely inside the bearing motor
You. As a result, the power input line and the signal input line are connected to the terminal 15.
Operation and control of the bearing motor are completed just by connecting
All can be done, lead wires and pulling out to the outside of the bearing motor
There are no running lines.

The bearing motor according to the present invention has a so-called
Easy conversion to a bearing motor with a dial structure
And a part of the rotary drive shaft B is replaced with a bearing motor.
Can be used as a component of the system, greatly simplifying the structure
In addition, the manufacturing cost can be reduced. As described above, the present invention has excellent practical utility.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional view of the bearing motor as viewed in FIG.

FIG. 2 is a vertical cross-sectional view of the bearing motor as viewed from a roll in FIG. 4;

FIG. 3 is a vertical sectional view of the bearing motor as viewed from a haha in FIG. 4;

FIG. 4 is an exploded perspective view of the bearing motor.

FIG. 5 is a partially enlarged view of the exploded perspective view of FIG. 4;

6 is a partially enlarged view of the exploded perspective view of FIG.

FIG. 7 is a partially enlarged view of the exploded perspective view of FIG. 4;

8 is a partially enlarged view of the exploded perspective view of FIG.

FIG. 9 is an explanatory diagram showing a positional relationship among a main magnetic pole, an auxiliary magnetic pole, and a permanent magnet.

FIG. 10 is a perspective view of a connection terminal member.

FIG. 11 is a longitudinal sectional view in which a part of a radial type bearing motor is omitted.

FIG. 12 is a longitudinal cross-sectional view of a radial type bearing motor according to another embodiment with a part thereof omitted.

FIG. 13 is an explanatory diagram of a drive unit and a bearing unit of a conventional drive shaft.

FIG. 14 shows an example of use of a conventional drive bearing device with a built-in motor.

FIG. 15 is a partial longitudinal sectional view of a conventional drive bearing device with a built-in motor.

[Explanation of symbols]

A is a bearing motor, B is a rotary drive shaft, 1 is an auxiliary stator, 2 is an auxiliary magnetic pole, 3 is a chip holder, 4 is a coil,
5 is a permanent magnet plate, 6 is a guide plate, 7 is a spacer, 7a is a spacer outer peripheral surface, 8 is a ball, 9 is a retainer, 10 is a main stator, 11 is a main magnetic pole, 12 is a guide pin, 13 is an assembly bolt, 14 Is a guide fixing bolt, 15 is a terminal member, 16 is an insertion hole, 17 is an outer wall, 18 is a coil insertion groove, 19 is a chip holder insertion space, 20 is a guide pin insertion hole, 21 is a bolt insertion hole, and 22 is a bolt insertion hole. Lead wire outlet groove,
23 is a fixing pin insertion hole of the chip holder, 24 is a chip fitting recess, 25 is a fixing pin, 26 is an electronic chip member,
7 is a notch for engagement, 28 is an engagement protrusion, 29 is a rolling groove, 3
0 is a fixing bolt insertion hole, 31 is a pin insertion hole, 32 is a spacer insertion hole, 33 is an outer wall body, 34 is a coil insertion groove, 35
Is a ball rolling groove, 36 is a pin insertion hole, 37 is a bolt insertion hole, 38 is a screw hole, 39 is a positioning pin, 40 is a vertical through hole, 41 is a ball rolling groove, 42 is a support piece, and 43 is a ball. Rolling groove, 44 is a fitting notch, 45 is a through hole, 46
Is a wiring pattern, 47 is a step, and 48 is a collar.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yutaka Sugimoto 1-26-14 Ishimaru, Minoh-shi, Osaka Examiner Osamu Kawabata (56) References JP-A-4-304133 (JP, A) JP-A-5- 38117 (JP, A) Japanese Utility Model 1987-51977 (JP, U) Japanese Utility Model Application Hei 4-61455 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H02K 16/00 H02K 37 / 12

Claims (6)

(57) [Claims] (1)The spacer insertion hole (32) is also outside at the center.
It has the thickness which provided the outer wall body (17) at the peripheral endCircular
It has a flange shape and is located on the upper and lower surfaces on the inner peripheral side.Thrust bearing
FormCircular ball rolling groove (35), (35)
And also outsideOn the top and bottom ofEmit multiple pole pieces
Main magnetic poles arranged in a circle (11), (11)
Further, coil insertion grooves (34) are provided on the upper and lower surfaces on the outer peripheral side,
(34)EachEstablishmentMain stator (10),Rotary drive
A circle having a drive shaft insertion hole through which the end of the shaft (B) is inserted
It is shaped like a collar,Both ball rolling of the main stator (10)
The moving grooves (35) are disposed opposite to each other.Together with both bows
Thrust bearing at the position corresponding to the rolling groove (35)
FormEquipped with a circular ball rolling groove (29)2 sheetsof
Guide plate (6), (6)When,It has a short cylindrical shape,The main
Of theta (10)SpacerInserted into the insertion hole (32)
At both endsOf both guide plates (6)
The inner peripheral side is supported and fixed, and the inserted rotary drive shaft
(B)WhatSupport fixeddidSpacer (7) and the main stay
Ball rolling groove (35) of the tab (10) and both guide plates
(6) inserted between the ball rolling groove (29)plural
Ball (8), (8)With a circular collar,Its circumference
BesideUp and down directions of N times the number of magnetic poles of the main magnetic pole (11)
Circular magnet consisting of radially arranged magnet pieces magnetized
With bodyAnd the magnet body isMain stator (1
0) Opposed to both main poles (11)Installed in a sloppy condition
ThatOn the inner circumferenceEach of the aboveFixed to guide plate (6)2 sheets
ofPermanent magnet plate (5), (5)And the main stator (1)
0) on the upper and lower outer peripheral sidesFormed coil insertion groove
(34), into (34)ArrangedTwoCoil (4),
(4)And a circular collar, the inner surface of whichBothMain magnet
Circular composed of the same number of pole pieces as the poles (11) arranged radially
An auxiliary magnetic pole (2);BothCoil (4) andBothPerpetual
Outside the thickness direction of the magnet plate (5)RespectivelyLocated andeachSupplement
With the auxiliary magnetic pole (2) facing the main magnetic pole (11),
On the stator (10)Face andTo the bottomRespectivelyStuckTwo
Auxiliary stator (1), (1)Composed ofAnd said rotation
Slide radially outward from the center shaft side of the drive shaft (B).
Pacer (7), ball (8), main pole (11) and auxiliary
It is noted that the magnetic pole (2) and the coil (4) were arranged in order.
Bearing motor. 2. The main stator (10) is provided with an outer wall (17) serving as a magnetic path to the auxiliary stator (1) at an outer peripheral end thereof, and a surface hardening process is performed on the vicinity of the ball rolling groove (35). The bearing motor according to claim 1, wherein the bearing motor is a main stator. 3. A fixing mechanism for mounting a spacer (7) on both guide plates (6) supporting and fixing a permanent magnet plate (5) with their respective vertically opposed positions shifted by an electrical angle of π / 2. The bearing motor according to claim 1, further comprising: 4. An auxiliary stator (1) having a ring-shaped chip holder (3) made of a liquid crystal polymer resin on an inner peripheral portion thereof, wherein the chip holder (3) has an electronic chip. A plurality of chip fitting recesses (2) for fixing the member (26)
2. The bearing motor according to claim 1, wherein said bearing motor has a structure in which the wiring between the electronic chip members is performed by plating or double molding on or in the surface of the liquid crystal polymer resin. 5. A ball rolling groove (35) of said main stator (10) and a ball rolling groove (2) of said both guide plates (6).
9) and the ball (8) inserted between the ball rolling grooves (35) and (29) to form a thrust bearing mechanism, and the inner diameter of the spacer (7) is adjusted by all other members. The center diameter of the ball (8) of the thrust bearing mechanism, the center diameter of the permanent magnet plate (5), the center diameter of the coil (4), which is smaller than the inner diameter and goes outward from the center axis of the spacer (7). The bearing motor according to claim 1, wherein each member is arranged in the order of the center diameter of the outer wall (17) of the main stator (10). 6. An arc-shaped notch (44) is provided on an outer peripheral surface of the auxiliary stator (1), and a part of a holding portion for the coil insertion space (18) and the auxiliary magnetic pole (2) is provided. Is formed with a groove (22), and the notch (4) is formed.
A terminal (15) corresponding to the shape is inserted and fixed in 4).
The bearing motor according to claim 1, wherein the main stator (10) is provided with upper and lower through holes (40) corresponding to the grooves (22).