CN106537737B - The manufacturing method and fixture of direct drive motor - Google Patents

Abstract

The present invention provides the manufacturing method and fixture of a kind of direct drive motor that can be obtained higher running accuracy and rotate detection accuracy.The manufacturing method of direct drive motor has: inner housing (3) for manufacturing direct drive motor (10)；Configure the rotor flange (5) in the outside of inner housing；By rotor flange (5) so that it rotates the bearing (11) that free mode supports relative to inner housing (3)；And rotary transformer (27), the manufacturing method includes: that the rotation circle (23) of bearing (11) is embedded into rotor flange (5), filler, and the process being fixed using the fixture of the radial width (W1) between the outer peripheral surface of radial width (A) and rotor flange (5) and the inner peripheral surface of rotary transformer rotor (33) between the outer peripheral surface for defining rotor flange (5) and the inner peripheral surface of retainer plate (21) are filled in gap between rotation circle (23) and rotor flange (5).

Description

The manufacturing method and fixture of direct drive motor

Technical field

The present invention relates to a kind of manufacturing method of direct drive motor and fixtures.

Background technique

It is known that, conventionally, there is direct drive motor (hereinafter also referred to DD motor), uses and directly transmit rotary force To rotary body, make the rotary body relative to driving method (the direct-connected drive of motor load rotated by rotary body to prescribed direction Flowing mode).This DD motor includes motor part, bearing, rotation detector (rotary transformer) and shell, global shape It is shaped generally as cylindric.In order to realize the miniaturization of conveying device, check device and lathe for using DD motor etc., preferably Using the flat knot of the axial height of the setting area (so-called occupied area) or the shell for the shell that can reduce the DD motor Structure.Therefore, it proposes in the past in order to reduce the occupied area of DD motor by motor part, bearing, rotation detector (rotation Transformer) in the axial direction file configuration structure (referring for example to patent document 1).

Patent document 1: Japanese Unexamined Patent Publication 2012-178926 bulletin

Summary of the invention

However, being configured to rotor flange and being set to conveying device, check device and lathe etc. by the socket joint of rotary body Hole carries out in the chimeric DD motor of socket joint, and the wobble accuracy of output shaft directly influences the running accuracy of rotary body.In the past, it was The wobble accuracy for improving DD motor, pursues always the raising of the dimensional accuracy of each component.On the other hand, for each component Surplus that is chimeric and needing to allow the dimensional tolerance of each component.Therefore, because the DD motor that the surplus of each component installs group Precision be lower than the dimensional accuracy of each component, possibly can not obtain required running accuracy.

The present invention was completed to solve the above problem, and its purpose is to provide one kind can obtain higher rotation The manufacturing method and fixture of the direct drive motor of precision.

To solve the above-mentioned problems, the first form of the invention provides a kind of manufacturing method of direct drive motor, should Direct drive motor has: motor part, with stator and the rotor that can be rotated relative to the stator；First shell Body is fixed with stator；Second shell configures in the outside of first shell, and is fixed with rotor；Bearing, by second Shell by make its relative to first shell rotation it is free in a manner of support；Retainer plate compacting part, together with first shell Axis clamps up the retainer plate of bearing；And rotation detector, it is used to detect the rotation status of motor part, above-mentioned direct drive The manufacturing method of dynamic motor include: in the axial specified position of second shell, will constitute multiple permanent magnets of rotor along Circumferential be in the process for concentrically configuring and fixing at predetermined intervals；The rotation circle of bearing is embedded into second shell, in bearing Rotation circle and second shell between gap in fill filler, and use the outer peripheral surface and bearing for defining second shell The process that the fixture of radial width between the inner peripheral surface of retainer plate is fixed；In the axial regulation of the outer peripheral surface of first shell Position, by the multiple motor iron-cores for constituting stator circumferentially at predetermined intervals in the process for concentrically configuring and fixing； First shell is inserted into the process of the retainer plate of bearing；And consolidating for bearing is clamped by first shell and retainer plate compacting part Fixed circle, and the process of the retainer plate of fixing bearing in the axial direction.

First form according to the present invention is able to suppress the output shaft side end of the second shell of direct drive motor The deviation of radial width between the inner peripheral surface of the retainer plate of outer peripheral surface and bearing, so that higher rotation essence can be obtained by obtaining The direct drive motor of degree.

In addition, the second form of the invention be in the manufacturing method of the direct drive motor of the first form, can also be with It is that in direct drive motor, rotation detector includes rotary transformer rotor and is opposed to the rotary transformer rotor The rotary transformer stator of configuration, the manufacturing method of direct drive motor further include: rotary transformer rotor is directly fixed In the process of second shell；And the process that rotary transformer stator is directly fixed on retainer plate compacting part.

Second form according to the present invention is able to suppress because the position of rotary transformer rotor and rotary transformer stator is inclined Difference and to the detection accuracy of the rotary angle position of second shell generate influence, thus obtain can accurately detect it is electronic The direct drive motor of the rotation status in machine portion.

In addition, third form of the invention be in the manufacturing method of the direct drive motor of the second form, can also be with It is, further includes: rotary transformer rotor is embedded into second shell, and is become using the outer peripheral surface and rotation for defining second shell The process that the fixture of radial width between the inner peripheral surface of depressor rotor is fixed.

Third form according to the present invention is able to suppress the outer peripheral surface and rotary transformer rotor of the outlet side of second shell Inner peripheral surface between radial width deviation, so that obtaining further can accurately detect the rotation status of motor part Direct drive motor.

In addition, the 4th form of the invention provides a kind of fixture, it is used in the manufacturing method of direct drive motor, it should Direct drive motor has: motor part, with stator and the rotor that can be rotated relative to the stator；First shell Body is fixed with stator；Second shell configures in the outside of first shell, and is fixed with rotor；Bearing, by second Shell by make its relative to first shell rotation it is free in a manner of support；Retainer plate compacting part, together with first shell Axis clamps up the retainer plate of bearing；And rotation detector, it is used to detect the rotation status of motor part, the fixture packet Include: circular groove portion is embedded in for second shell；And columned protrusion, it is inserted in for the retainer plate of bearing, circular slot Portion includes: peripheral side wall surface, centered on the rotary shaft of motor part；And inner circumferential side wall surface, radius are less than peripheral side The radius of wall surface, the radial width that circular groove portion is configured to the groove portion of the annular shape are greater than the output shaft side of second shell The radial width in portion, and the periphery face contact of the output shaft side end of peripheral side wall surface and second shell, the slot of the annular shape The bottom in portion is contacted with the axial end face of the output shaft side end of second shell, and columned protrusion has with the rotation of motor part Periphery wall surface centered on shaft, columned protrusion are configured to from the bottom surface of circular groove portion to the columned protrusion The height of output shaft side end is greater than from the axial end face of the output shaft side end of second shell to the output shaft side end face of bearing Height, the inner circumferential face contact of the retainer plate of periphery wall surface and above-mentioned bearing, by the peripheral side wall surface of circular groove portion with Radial distance between the periphery wall surface of columned protrusion, it is specified that the retainer plate of the outer peripheral surface and bearing of second shell inner circumferential Radial width between face.

4th form according to the present invention is able to suppress the output shaft side end of the second shell of direct drive motor Higher running accuracy can be obtained to obtain in the deviation of radial width between the inner peripheral surface of the retainer plate of outer peripheral surface and bearing Direct drive motor.

In addition, the 5th form of the invention is the fixture in the 4th form, it is also possible to rotate in direct drive motor Detector includes rotary transformer rotor and is opposed to the rotary transformer stator of configuration with the rotary transformer rotor, passes through Radial distance between the inner circumferential side wall surface and peripheral side wall surface of circular groove portion, it is specified that second shell outer peripheral surface and rotation Radial width between the inner peripheral surface of transformer rotor.

5th form according to the present invention is able to suppress the output shaft side end of the second shell of direct drive motor The output shaft side end of the deviation and second shell of radial width between the inner peripheral surface of the retainer plate of outer peripheral surface and bearing The deviation of radial width between outer peripheral surface and the inner peripheral surface of rotary transformer rotor can be improved motor part to obtain The direct drive motor of the detection accuracy of rotation status.

In addition, the 6th form of the invention be in the manufacturing method of the direct drive motor of the first form, can also be with It is that the retainer plate compacting part of direct drive motor is made of non-magnetic material.Using this structure, it is able to suppress because coming from The magnetic line of force of motor part wraps to rotation detector and to the shadow of the detection accuracy of the rotary angle position of second shell generation It rings, so as to accurately detect the rotation status of motor part.

In addition, the 7th form of the invention be in the manufacturing method of the direct drive motor of the first form, can also be with It is that the rotation detector of direct drive motor is for detecting the single of the increment type of relative displacement of the rotor relative to stator Rotary transformer.Using this structure, the axial height size of direct drive motor can be reduced, so as to realize directly The miniaturization of drive motor in the axial direction.

In addition, the 8th form of the invention be in the manufacturing method of the direct drive motor of the 7th form, can also be with Be that direct drive motor has: power factor test section, detection power factor when powering on to motor part is 0 Position；And commutation control unit, according to power factor be 0 position and from rotary transformer export increment information come Control the commutation of the motor part.It, also can be high even only carrying the structure of single rotary transformer using this structure Detect to precision the rotation status of direct drive motor.

In addition, the 9th form of the invention be in the manufacturing method of the direct drive motor of the first form, can also be with It is that in direct drive motor, motor part, bearing and rotation detector are arranged in the axial direction of bearing.Using this Structure is able to suppress direct drive motor expansion in the radial direction, so as to realize the reduction of occupied area.

In addition, the tenth form of the invention be in the manufacturing method of the direct drive motor of the first form, can also be with It is that the second shell of direct drive motor has: flange part, extends in an axial end surface side of the rotation circle of bearing； And rotation circle compacting part, it configures in another axial end surface side of the rotation circle.Using this structure, even if just in case filling out The bonding force decline for filling the filler of the chimeric surface in bearing and second shell, can also prevent bearing to be detached from from second shell.

In addition, the 11st form of the invention be in the manufacturing method of the direct drive motor of the first form, can also To be, the second shell of direct drive motor is shaped generally as cylindrical shape, and is integral structure seamless in the axial direction. Using this structure, do not make second shell in the axial direction enlargement also can bearing support, directly drive electricity so as to realize The miniaturization of motivation.

Form according to the present invention is capable of providing a kind of system of direct drive motor that can get higher running accuracy Make method and fixture.

Detailed description of the invention

Fig. 1 is the sectional view for indicating the structure of direct drive motor of the present embodiment.

Fig. 2 is the structure for indicating the rotary angle position to direct drive motor of the present embodiment and being controlled Block diagram.

Fig. 3 is fixing means of the bearing relative to rotor flange for illustrating direct drive motor of the present embodiment Figure.

Fig. 4 is an exemplary figure for indicating the shape of fixture of the present embodiment.

Fig. 5 is an exemplary figure for indicating the manufacturing step of direct drive motor of the present embodiment.

Fig. 6 is the figure of the first step in the manufacturing method for indicate direct drive motor of the present embodiment.

Fig. 7 is the figure of the second step in the manufacturing method for indicate direct drive motor of the present embodiment.

Fig. 8 is the figure of the third step in the manufacturing method for indicate direct drive motor of the present embodiment.

Fig. 9 is the figure of the fourth step in the manufacturing method for indicate direct drive motor of the present embodiment.

Figure 10 is the figure of the 5th process in the manufacturing method for indicate direct drive motor of the present embodiment.

Figure 11 is the schematic structural diagram using the check device of direct drive motor of the present embodiment.

Figure 12 is the schematic structural diagram using the lathe of direct drive motor of the present embodiment.

Symbol description

3 inner housings (first shell)

5 rotor flanges (second shell)

7 shells

9 motor parts

10 DD motor

11 bearings

13 stators (stator)

15 rotors (rotor)

20 control units

21 inner rings (retainer plate)

An axial end face (axial end face) for 21a inner ring (retainer plate)

The axial other end (another axial end face) of 21b inner ring (retainer plate)

23 outer rings (rotation circle)

An axial end face (axial end face) for the outer ring 23a (rotation circle)

The axial other end (another axial end face) of the outer ring 23b (rotation circle)

25 rolling elements

27 rotary transformers (rotation detector)

29 inner ring compacting parts (retainer plate compacting part)

33 rotary transformer rotors

35 rotary transformer stators

41 power factor test sections

43 commutation control units

51 flange parts (rotor flange)

52 groove portions

53 outer ring compacting parts (rotation circle compacting part)

60 inner ring fixed parts

61 flange parts (inner housing)

80 workbench

81 inspection objects (conveying object)

82 video cameras (inspection portion)

91 workpieces (object)

100 check devices

101 lathes

200 by rotary body

200a socket joint hole (by rotary body)

300 fixtures

301 groove portions (fixture)

302 peripheral side wall surfaces (groove portion)

303 bottoms (groove portion)

304 inner circumferential side wall surfaces (groove portion)

305 protrusions (fixture)

306 periphery wall surfaces (protrusion)

307 through holes

S rotary shaft

Specific embodiment

Mode for carrying out the present invention (embodiment) is described in detail referring to attached drawing.The present invention is not limited to following Content documented by embodiment.In addition, can be easy to think comprising those skilled in the art in the structural element of following record Structural element, substantially the same structural element arrived.Moreover, the structural element recorded below can be appropriately combined.

Fig. 1 is the sectional view for indicating the structure of direct drive motor 10 of the present embodiment.It directly drives electronic Machine (hereinafter referred to as DD motor) 10 can not be direct by rotary force via speed reducer structure (such as reduction gearing, transmission belt etc.) Rotary body is passed to, rotates the rotary body along prescribed direction.

The DD motor 10 of present embodiment is configured to usually said external-rotor motor.As shown in Figure 1, DD is electronic Machine 10 has: shell 7 comprising the cricoid inner housing (first shell) 3 for being fixed on base station 1 and configuration are in the inner housing 3 Outside cricoid rotor flange (second shell) 5；Motor part 9 is assembled between inner housing 3 and rotor flange 5, Rotate rotor flange 5 relative to inner housing 3；And bearing 11, rotor flange 5 is supported in a manner of it can rotate interior Shell 3.

Inner housing 3 and rotor flange 5 are respectively formed as the different substantially cylindrical shape of diameter, relative to rotary shaft S in same Configure to heart shaped.Rotor flange 5 is seamless integral structure in the axial direction (being up and down direction in Fig. 1) of rotary shaft S.That is, Rotor flange 5 is configured in the axial direction of rotary shaft S on from lower end to the complete cycle of upper end continuous substantially cylindric, upper End can install various workpiece (not shown).By rotating rotor flange 5 by motor part 9, can make various workpiece with It is rotated in prescribed direction together.In this way, rotor flange 5 due to motor part 9 movement and revolved centered on rotary shaft S Transhipment is dynamic, therefore has the function as output shaft.In addition, inner housing 3 be configured in the axial direction of rotary shaft S from lower end to It is continuous substantially cylindric on the complete cycle of bearing 11, and clamping together with inner ring compacting part (retainer plate compacting part) 29 should Bearing 11.In addition, in the present embodiment, inner housing 3 and rotor flange 5 are made of magnetic material, inner ring compacting part 29 by Non-magnetic material is constituted.Its reason will be described hereinafter.

Motor part 9 is configured at the lower part of shell 7 (near base station 1).Motor part 9 includes: be fixed on inner housing 3 outer The stator (stator) 13 of circumferential surface；And be fixed on rotor flange 5 inner peripheral surface, with stator 13 be opposed to configuration rotor (rotor)15.Stator 13 has multiple motor iron-cores 17, between circumferentially (direction of rotation of rotor flange 5) is to provide Every (such as at equal intervals) in concentrically arranging, it is fixed in each motor iron-core 17 by stator line made of conducting wire coiled multiple times Circle 19.Stator 13 is connect with the wiring for supplying the electric power from control unit 20 (Fig. 2), by the wiring to stator coil 19 supply electric power.Rotor 15 is by circumferentially (direction of rotation of rotor flange 5) at predetermined intervals (such as at equal intervals) in concentric The multiple permanent magnets arranged to shape are constituted.When being powered by control unit 20 to stator coil 19, according to not come a bright left side Hand law applies rotary force to rotor flange 5, and rotor flange 5 is rotated along prescribed direction.In addition, DD of the present embodiment The rotor flange 5 of motor 10 be set to conveying device, check device and lathe etc. and held by the socket joint hole 200a of rotary body 200 It inserts and is fitted into, make to be rotated by rotary body 200.Hereinafter, being defined being installed in rotor flange 5 by the axial end portion of 200 side of rotary body For output shaft side end.

Bearing 11 is axially disposed the position compared with motor part 9 far from base station 1.Bearing 11 includes with can be opposite The mode of rotation is opposed to the inner ring (retainer plate) 21 configured and outer ring (rotation circle) 23 and is arranged in a manner of it can roll Multiple rolling elements 25 between the inner ring 21 and outer ring 23.Bearing 11 preferably can individually carry axial load and torque The bearing of load both sides, such as four-point contact ball, three-point contact ball bearing, deep groove ball bearings or crossed roller can be used Bearing etc..It is preferably the bearing of segmenting structure without using common inner ring or outer ring using crossed roller bearing And the bearing being all structure as a whole using Internal and external cycle.Inner ring 21 is clamped by inner housing 3 and inner ring compacting part 29, and outer ring 23 is fixed In the inner peripheral surface of rotor flange 5.The supporting structure of bearing 11 will be explained below.

In addition, DD motor 10 is in the top of bearing 11 (i.e. in the axial direction compared with bearing 11 far from the position of base station 1) It is provided with rotary transformer (rotation detector) 27, is used to detect rotation status (such as the revolving speed, rotation side of motor part 9 To or rotation angle etc.).Thereby, it is possible to make the various workpiece for being installed on rotor flange 5 accurately rotate predetermined angular, high-precision Ground is positioned at target position.It is protected in addition, rotary transformer 27 is isolated from the outside by lid 31, lid 31 is in circle Plate is set to the top of the inner ring compacting part 29 linked with inner housing 3.

In the present embodiment, DD motor 10 uses following structures: by motor part 9, bearing 11 and rotation transformation The file in a manner of arranging in the axial direction of rotary shaft S (up and down direction in Fig. 1) of device 27 configures in shell 7.As a result, in DD In motor 10, due to can inhibit the increase radially centered on rotary shaft S, so can be realized the setting face of shell 7 The reduction of product (so-called occupied area).And DD motor not only the setting area reduction of shell but also axial height are required in recent years It is also sized to reduce.

In the present embodiment, single rotary transformer 27 is only configured in shell 7.Rotary transformer 27 is increment Formula rotary transformer detects relative displacement of the rotor 15 relative to stator 13.Rotary transformer 27 includes: that rotary transformer turns Son 33, it is annular in shape；And rotary transformer stator 35, it is opposed to configure with the inside of rotary transformer rotor 33, have There are the circular shape centered on rotary shaft S, the magnetic resistance change rate between detection and rotary transformer rotor 33.In this way, logical It crosses using the structure for being only configured with single rotary transformer 27 in shell 7, with the configuration absolute type rotation of axially file The structure of both rotary transformers of transformer with increment type rotary transformer is compared, and the axial high of DD motor 10 can be reduced Spend size.

Rotary transformer rotor 33 is solid without being directly mounted at rotary transformer rotor via other component by bolt 33a Determine portion 5a and integrated, rotary transformer rotor fixed part 5a is formed in the inner peripheral surface of rotor flange 5.In addition, rotation transformation Device stator 35 by bolt 35a without being directly mounted at rotary transformer stator fixed part 29a integration via other component, Rotary transformer stator fixed part 29a is formed in the outer peripheral surface of inner ring compacting part 29.

Using the above structure, magnetic resistance can generate variation according to the position of rotary transformer rotor 33.Therefore, rotor flange 5 It often rotates a circle, is exactly a cycle of the fundametal compoment of magnetic resistance change rate.The rotation of rotary transformer 27 output and rotor flange 5 Angle position accordingly generates the signals of rotating transformer (increment information) of variation.

Fig. 2 is the frame for indicating the structure of the rotary angle position for controlling DD motor 10 of the present embodiment Figure.DD motor 10 is connect with the control unit 20 of the movement for controlling the DD motor 10.The control unit 20 includes: function Rate factor test section 41 detects the position that power factor is 0 when powering on to motor part 9；And commutation control unit 43, the position for being 0 based on the power factor and signals of rotating transformer are come the commutation that controls motor part 9.

In the present embodiment, the detection of power factor test section 41 powers on to motor part 9 (stator coil 19) When power factor be 0 rotary transformer rotor 33 position, the position that this is detected is set as base position.Then, will The base position is output to commutation control unit 43.Commutation control unit 43 is obtained to be believed by the rotary transformer that rotary transformer 27 detects Number, the commutation for flowing through the motor current of motor part 9 is controlled based on the variation of the signals of rotating transformer and base position Periodically.Absolute type rotary transformer is not needed when detecting the commutation timing of motor current as a result, because exhausted without carrying To formula rotary transformer and increment type rotary transformer both rotation detectors.Therefore, single rotation transformation can be used Device structure, so as to inhibit the axial height of DD motor 10.

Then, the supporting structure of the outer ring of bearing 11 (rotation is enclosed) 23 is illustrated.In the inner peripheral surface of rotor flange 5 On, it along complete cycle is formed with the comparable outer ring fixed part 50 of axial height of its width Yu bearing 11, in the outer ring fixed part 50 27 lateral edge complete cycle of rotary transformer be formed with flange part 51, the diameter of the flange part 51 is less than the outer ring (rotation of bearing 11 Circle) 23 outer diameter and protrude inwardly.Bearing is had a diameter larger than in addition, being formed in 9 side of motor part of outer ring fixed part 50 The groove portion 52 of the outer diameter of 11 outer ring (rotation circle) 23.

Flange part 51 extends in an axial end face (27 side end face of the rotary transformer) side 23a of outer ring (rotation circle) 23.It is excellent Select flange part 51 to be formed in the following manner: the inner peripheral surface 51b of the flange part 51 is located at the outer of the inner peripheral surface of outer ring (rotation circle) 23 Side, and it is located at the inside of the corner portion of outer ring (rotation circle) 23.Thereby, it is possible to by the reliably bearing support 11 of flange part 51 Outer ring (rotation circle) 23.

In addition, being equipped with outer ring compacting part (the rotation circle pressure with the elastic force expanded to the outer direction in groove portion 52 Tight component) 53, axial other end (9 side end face of the motor part) 23b of the outer ring compacting part 53 in outer ring (rotation circle) 23 Side extends.The outer diameter of groove portion 52 is more slightly larger than the maximum outside diameter of the outer ring of bearing 11 (rotation circle) 23, even if bearing 11 itself is permitted Perhaps load, which is applied to outer ring compacting part 53, so that it is fallen off.In addition, C-shaped can be used as outer ring compacting part 53 Elastic ring also can be used in locating snap ring.

In addition, bearing 11 outer ring (rotation circle) 23 and be formed in rotor flange 5 outer ring fixed part 50 between Filled with filler (such as molding agent, adhesive) in gap, solidified by the filler, bearing 11 and rotor flange 5 is fixed.

In this way, the outer ring (rotation circle) 23 of bearing 11 is arranged at the convex of the axial upper and lower (both ends) of outer ring fixed part 50 Edge 51 and outer ring compacting part 53 clamp in the axial direction, by the gap that is filled between bearing 11 and outer ring fixed part 50 Filler solidification and be fixed.

Then, the supporting structure of the inner ring (retainer plate) 21 of bearing 11 is illustrated.In rotor flange 5 and bearing 11 After outer ring (rotation circle) 23 is fixed, the inner ring (retainer plate) 21 of bearing 11 is clamped by inner housing 3 and inner ring compacting part 29, And fastened with multiple bolt 35b, the inner ring (retainer plate) 21 of simultaneously bearing support 11 is thus fixed in the axial direction.In addition, In In present embodiment, inserting the bolt 35b that inner housing 3 and inner ring compacting part 29 are fixed is and is used for rotary transformer Stator 35 is fixed on the different another component of bolt 35a of inner ring compacting part 29.

The outer diameter of inner ring compacting part 29 is greater than the internal diameter of the inner ring (retainer plate) 21 of bearing 11.Inner ring compacting part 29 Outer edge extends in an axial end face (27 1 side end face of the rotary transformer) side 21a of inner ring (retainer plate) 21.Inner ring compressed part Part 29 is preferably formed in such a way: the outer edge of the inner ring compacting part 29 is located at the interior of the outer peripheral surface of inner ring (retainer plate) 21 Side, and it is located at the outside of the corner portion of inner ring (retainer plate) 21.Thereby, it is possible to by the reliably support shaft of inner ring compacting part 29 Hold 11 inner ring (retainer plate) 21.

In addition, along complete cycle being formed with the axial height of its width and bearing 11 from upper end on the outer peripheral surface of inner housing 3 Spend comparable inner ring fixed part 60, the inner ring fixed part 60 9 lateral edge complete cycle of motor part be formed with flange part 61, this is convex The diameter of edge 61 is greater than the internal diameter of the inner ring (retainer plate) 21 of bearing 11 and protrudes outward.

Flange part 61 extends in axial other end (9 side end face of the motor part) side 21b of inner ring (retainer plate) 21.Flange Portion 61 is preferably formed in such a way: the outer peripheral surface 61b of the flange part 61 is located at the inside of the outer peripheral surface of inner ring (retainer plate) 21, And it is located at the outside of the corner portion of inner ring (retainer plate) 21.Thereby, it is possible to by flange part 61 reliably bearing support 11 Enclose (retainer plate) 21.

In addition, bearing 11 inner ring (retainer plate) 21 and be formed in inner housing 3 inner ring fixed part 60 between gap Middle filling filler (such as molding agent, adhesive), being solidified by the filler makes bearing 11 be fixed on inner housing 3.

In this way, the inner ring (retainer plate) 21 of bearing 11 is by inner ring compacting part 29 and the axial direction that inner ring fixed part 60 is arranged in The flange part 61 of lower end clamps in the axial direction, passes through the filler in the gap that is filled between bearing 11 and inner ring fixed part 60 Solidify and is fixed.

In addition, in DD motor 10 of the present embodiment, in order to make the rotor flange 5 as output shaft relative to Non-rotary structural portion based on inner housing 3 and inner ring compacting part 29 is rotated with higher running accuracy, need improve by The precision of the radial width for the structural body that bearing 11 and rotor flange 5 are constituted.In addition, in order to higher accuracy detection rotor method Rotation of the orchid 5 relative to inner housing 3 and rotary transformer stator 35 needs to improve the rotary transformer for being installed on rotor flange 5 The precision of the radial width of rotor 33.

Then, opposite relative to the fixing means and rotary transformer rotor 33 of rotor flange 5 to bearing 11 referring to Fig. 3 It is illustrated in the fixing means of rotor flange 5.Fig. 3 is to illustrate that the bearing 11 of DD motor 10 of the present embodiment is opposite In the figure of the fixing means of rotor flange 5.

The structural portion of DD motor 10 is constituted for bearing 11 and rotor flange 5, inner housing 3, inner ring compacting part 29 etc. More demanding dimensional accuracy, but surplus is needed when assembling each component in order to allow the dimensional tolerance of each component.Due to The surplus, the chimeric surface when combining each component between each component generate gap.In particular, between bearing 11 and rotor flange 5 Chimeric surface, that is between the outer ring of bearing 11 (rotation circle) 23 and the outer ring fixed part 50 for being formed in rotor flange 5 It generates gap (such as 20 μm~200 μm), and in the case that the gap generates deviation in the circumferential, it can be to DD motor 10 Running accuracy has an impact.Therefore, in the present embodiment, as shown in Figure 3, carry out regulation rotor flange 5 using fixture 300 Output shaft side end outer peripheral surface and bearing 11 inner ring (retainer plate) 21 inner peripheral surface between radial width A, Yi Jizhuan Radial width W1 between the outer peripheral surface of the output shaft side end of sub- flange 5 and the inner peripheral surface of rotary transformer rotor 33.

Specifically, the outer ring (rotation is enclosed) 23 of bearing 11 is embedded into the outer ring fixed part 50 for being formed in rotor flange 5, Bearing 11 outer ring (rotation circle) 23 and be formed in rotor flange 5 outer ring fixed part 50 between gap in fill filler (such as molding agent, adhesive), and outer ring compacting part 53 is installed, by the flange part of outer ring compacting part 53 and rotor flange 5 51 clamp the outer ring (rotation circle) 23 of bearing 11 in the axial direction.Then, with bolt 33a that rotary transformer rotor 33 is temporarily fixed In the rotary transformer rotor fixed part 5a for being formed in rotor flange 5.In this state, carry out regulation rotor using fixture 300 Radial width A between the inner peripheral surface of the inner ring (retainer plate) 21 of the outer peripheral surface and bearing 11 of the output shaft side end of flange 5, with And the output shaft side end of rotor flange 5 outer peripheral surface and rotary transformer rotor 33 inner peripheral surface between radial width W1, It is fixed up in the gap between the outer ring fixed part 50 for being filled in the outer ring 23 of bearing 11 and being formed in rotor flange 5 Filler solidification, and rotary transformer rotor 33 is fixed with bolt 33a.

Fig. 4 is an exemplary figure for indicating the shape of fixture 300 of the present embodiment.Example shown in Fig. 4 In, the circular groove portion 301 being embedded in for rotor flange 5 is formed in fixture 300.The groove portion 301, which has with rotary shaft S, is Peripheral side wall surface 302 and its radius R2 that the radius of the heart is R1 are less than the inner circumferential side wall surface 304 of radius R1, peripheral side wall surface 302 with the periphery face contact of the output shaft side end of rotor flange 5, the axis of the output shaft side end of bottom 303 and rotor flange 5 It is contacted to end face.In addition, groove portion 301 is configured to the radial direction between the peripheral side wall surface 302 of groove portion 301 and inner circumferential side wall surface 304 The radial width W1 of distance, that is groove portion 301 is greater than radial width W2 (the W1 > of the output shaft side end of rotor flange 5 W2)。

In addition, in fixture 300, the columned protrusion 305 be inserted in for the inner ring (retainer plate) 21 of bearing 11 is to motor 9 side of portion is prominent.The protrusion 305 is configured to the periphery wall surface 306 with the radius centered on rotary shaft S for R3, from groove portion 301 Bottom 303 to output shaft side end height H1 be greater than from the axial end face of the output shaft side end of rotor flange 5 to bearing The inner peripheral surface of the inner ring (retainer plate) 21 of the height H2 (H1 > H2) of 11 output shaft side end face, periphery wall surface 306 and bearing 11 Contact.But the axial end face of the height H1 in protrusion 305 and the output shaft side end from rotor flange 5 is defeated to bearing 11 In the lesser situation of difference of the height H2 of the end face of shaft side, the periphery wall surface 306 of protrusion 305 and the inner ring of bearing 11 are (fixed Circle) 21 area of inner circumferential face contact becomes smaller, and the axle center of bearing 11 may be made obliquely to fix relative to rotary shaft S.Therefore, more It is preferred that the height H1 of protrusion 305 is from the axial end face of the output shaft side end of rotor flange 5 to 9 side of motor part of bearing 11 End face height H3 or more (H1 >=H3).

In addition, the height H4 of the inner circumferential side wall surface 304 of the groove portion 301 of fixture 300 is from the output shaft side of rotor flange 5 The axial end face in portion to rotary transformer rotor fixed part 5a height H5 more than and less than from the output shaft side of rotor flange 5 The axial end face in portion to the output shaft side of bearing 11 end face height H2 (H5≤H4 < H2), and inner circumferential side wall surface 304 with The inner circumferential face contact of rotary transformer rotor 33.

By using the fixture 300 of above structure, (the radius of the peripheral side wall surface 302 of groove portion 301 can be provided out R1)-(the radius R3 of the periphery wall surface 306 of the protrusion 305)=(outer peripheral surface and bearing 11 of the output shaft side end of rotor flange 5 Inner ring (retainer plate) 21 inner peripheral surface between radial width A).

Moreover, can provide out (the half of the peripheral side wall surface 302 of groove portion 301 by using the fixture 300 of above structure Diameter R1)-(the radius R2 of the inner circumferential side wall surface 304 of groove portion 301)=(outer peripheral surface of the output shaft side end of rotor flange 5 and rotation Turn the radial width W1 between the inner peripheral surface of transformer rotor 33).

In addition, fixture 300 may not be it is such centered on the rotary shaft S of DD motor 10 as shown in Figure 3 and Figure 4 Throughout the shape of complete cycle, such as it is also possible at least (such as circumferential in three directions radially extended from rotary shaft S On every 120 ° of three directions) on, can provide the outer peripheral surface of the output shaft side end of rotor flange 5 and the inner ring of bearing 11 The outer peripheral surface of the output shaft side end of radial width A and rotor flange 5 between the inner peripheral surface of (retainer plate) 21 and rotation become The shape of radial width W1 between the inner peripheral surface of depressor rotor 33.In addition, fixture 300 is also possible to hollow structure, and only Want can to provide out the outer peripheral surface of the output shaft side end of rotor flange 5 and the inner ring (retainer plate) 21 of bearing 11 inner peripheral surface it Between radial width A and rotor flange 5 output shaft side end outer peripheral surface and rotary transformer rotor 33 inner peripheral surface it Between radial width W1, so that it may use any materials.

Next, bearing 11 outer ring (rotation circle) 23 and be formed in rotor flange 5 outer ring fixed part 50 between The filler solidification filled in gap, and it is fixed on bearing 11 after rotor flange 5, unload fixture 300.

In such manner, it is possible to inhibit the outer peripheral surface of the output shaft side end of rotor flange 5 and the inner ring (retainer plate) 21 of bearing 11 Inner peripheral surface between radial width deviation, can be improved the running accuracy of DD motor 10.It is further possible to inhibit rotor The deviation of radial width between the outer peripheral surface of the output shaft side end of flange 5 and the inner peripheral surface of rotary transformer rotor 33, because This also can be improved the precision of the rotation detection of DD motor 10.

Here, in DD motor 10 of the present embodiment, inner housing 3 and inner ring compacting part 29 are defined as structure At the structural body of the fixed part of DD motor 10, rotor flange 5 is defined as to constitute the structural body of the rotating part of DD motor 10.

For example, being made of in the structural body for constituting rotating part the outer ring compacting part of the rotor flange component of lower part and top And by needing to insert multiple bolts in the structure of the outer ring (rotation is enclosed) of outer ring compacting part and rotor flange component clamping bearing Etc. fixing outer ring compacting part and rotor flange component.In such a configuration, pass through outer ring compacting part and rotor flange Component clamps the outer ring (rotation circle) of bearing and by fastening bolt come fixing bearing, but if using such structure, The number of components for then constituting DD motor increases, and is may cause because allowing the surplus of dimensional tolerance of each component in assembling DD electricity Dimensional accuracy reduces when motivation.

In the present embodiment, as described above, constitute DD motor 10 rotating part structural body, that is, rotor flange 5 be Seamless integral structure, is configured in the axial direction of rotary shaft S from lower end in the axial direction (up and down direction in Fig. 1) of rotary shaft S Portion to upper end is continuously substantially cylindric along complete cycle.Therefore, the dimensional accuracy when group installs DD motor 10 is able to suppress to drop It is low, and by inhibiting between the output shaft side end of rotor flange 5 and the inner peripheral surface of the inner ring (retainer plate) 21 of bearing 11 The deviation of radial width is able to suppress the i.e. motor air gap in gap between stator (stator) 13 and rotor (rotor) 15 Rotation changes, and then is able to suppress cogging torque.In addition, the number of components for constituting DD motor 10 is reduced, therefore can Reduce the cost and manufacturing cost of DD motor 10.It can also enough inhibiting the outer peripheral surface of the output shaft side end of rotor flange 5 The deviation of radial width between the inner peripheral surface of rotary transformer rotor 33, therefore can be improved the rotation inspection of DD motor 10 The precision of survey.

In addition, in the present embodiment, being only configured with single rotary transformer in shell 7 as described above, using 27 structure can reduce the axial height of rotor flange 5 so can reduce the axial height size of DD motor 10 therewith Size.Thereby, it is possible to reduce the usage amount of the material of rotor flange 5, it is cost effective to facilitate DD motor 10.

Then, it is said referring to of the present embodiment manufacturing method of the Fig. 5 to Figure 10 to above-mentioned DD motor 10 It is bright.Fig. 5 is an exemplary figure for indicating the manufacturing step of DD motor 10 of the present embodiment.Fig. 6 is to indicate this reality The figure of first step in the manufacturing method for the DD motor 10 that the mode of applying is related to.Fig. 7 is to indicate DD of the present embodiment The figure of the second step in the manufacturing method of motor 10.Fig. 8 is the manufacture for indicating DD motor 10 of the present embodiment The figure of the third step in method.Fig. 9 is the 4th work in the manufacturing method for indicate DD motor 10 of the present embodiment The figure of sequence.Figure 10 is the figure of the 5th process in the manufacturing method for indicate DD motor 10 of the present embodiment.

In first step, as shown in fig. 6, the multiple permanent magnets for constituting rotor 15 are pasted and fixed on rotor flange 5 Inner peripheral surface axial specified position.In the present embodiment, by each permanent magnet circumferentially (rotation side of rotor flange 5 To) it at predetermined intervals (such as at equal intervals) is in concentrically to configure and fix (the step ST101 of Fig. 5).This consolidates permanent magnet It is, for example, fixing means known to adhesive etc. due to the fixing means of rotor flange 5, the present invention is not limited to the fixation sides Method.In addition, the example that permanent magnet is pasted and fixed on to the inner peripheral surface of rotor flange 5 is shown in the present embodiment, but It is that permanent magnet can also be embedded in rotor flange 5 and circumferentially be in concentrically to configure.In addition, rotary transformer rotor 33 are temporarily fixed to be formed in the rotation of the inner peripheral surface of rotor flange 5 bolt 33a in a manner of being able to carry out position adjustment Transformer rotor fixed part 5a.

In the second step, as shown in fig. 7, by the output for the rotor flange 5 for having fixed rotor 15 in first step Axis direction end is axially embedded into the groove portion 301 of fixture 300, and the rotary transformer for being temporarily fixed to rotor flange 5 turns The inner peripheral surface of son 33 is inserted in the inner circumferential side wall surface 304 of the groove portion 301 of fixture 300, and bearing 11 is axially inserted in fixture 300 Protrusion 305.Then, between the outer ring (rotation circle) for being formed in bearing 11 is between 23 and the outer ring fixed part 50 of rotor flange 5 Filler (such as molding agent, adhesive) is filled in gap, and outer ring compacting part 53 is mounted on to the slot for being formed in rotor flange 5 In portion 52, the outer ring (rotation circle) of bearing 11 is clamped in the axial direction by the flange part 51 of outer ring compacting part 53 and rotor flange 5 23 (the step ST102 of Fig. 5).Then, the bolt 33a of fixed rotary transformer rotor 33 is formally tightened.For this purpose, in fixture 300 It is provided with multiple through holes 307 for passing through for tightening the tool of bolt 33a.

In addition, describing the groove portion that the output axis direction end of rotor flange 5 is embedded into fixture 300 in the above description In 301, and bearing 11 is inserted in the example of the protrusion 305 of fixture 300, but bearing 11 can also be assembled in rotor in advance In the state of flange 5, the output axis direction end of rotor flange 5 is embedded into the groove portion 301 of fixture 300, by 11 sets of bearing Enter the protrusion 305 of fixture 300.In addition, describing in the outer ring (rotation circle) 23 and the outer ring of rotor flange 5 for being formed in bearing 11 Fill the example of filler in gap between fixed part 50, but can also in advance in the outer ring of bearing 11 (rotation circle) 23 or The outer ring fixed part 50 of rotor flange 5 coats assemble rotor flange 5 and bearing 11 after adhesive.But in this case, having can The adhesive coated in advance, rotor flange 5 and axis can be rubbed in certain edge parts in assemble rotor flange 5 and bearing 11 Holding the gap between 11 can not fully be filled up by adhesive.It is therefore preferable that rotor flange 5 and bearing 11 are assembled in folder In the state of tool 300, between the outer ring (rotation circle) for being formed in bearing 11 is between 23 and the outer ring fixed part 50 of rotor flange 5 Filler is filled in gap.

In addition, in the above description, describing in the state that rotary transformer rotor 33 is temporarily fixed to rotor flange The lower example for being embedded in fixture 300, but can also be in the inner circumferential side wall surface that rotary transformer rotor 33 is inserted in groove portion 301 After fixture 300 is embedded into rotor flange 5 in the state of 304, rotary transformer rotor 33 is fixed on rotor flange 5. But in this case, in order to be readily inserted into bolt 33a for fixing, the through hole 307 of preferred fixture 300 has It is enough the size for passing through bolt 33a.Then, the filler filled in the gap between bearing 11 and rotor flange 5 is solid Change and be fixed on bearing 11 after rotor flange 5, unloads fixture 300.As long as in addition, unloading the time of fixture 300 aftermentioned The fourth step before, so that it may be any time.

In the third step, as shown in figure 8, the multiple motor iron-cores 17 for constituting stator 13 are pasted and fixed on inner housing The axial specified position of 3 outer peripheral surface.In the present embodiment, by the circumferentially (rotation of rotor flange 5 of each motor iron-core 17 Turn direction) it at predetermined intervals (such as at equal intervals) is in concentrically to configure and fix (the step ST103 of Fig. 5).In each motor Iron core 17 is fixed with stator coil 19 made of conducting wire coiled multiple times.Motor iron-core 17 is fixed on consolidating for inner housing 3 by this Determine method and is, for example, fixation side known to adhesive etc. by the fixing means that stator coil 19 is fixed on motor iron-core 17 Method, the present invention is not limited to the fixing means.

In the fourth step, as shown in figure 9, the inner ring fixed part 60 that will be formed in the outer peripheral surface of inner housing 3 is inserted into axis Hold 11 inner ring (retainer plate) 21 (the step ST104 of Fig. 5).Then, in the inner ring (retainer plate) 21 of bearing 11 and in being formed in Filler (such as molding agent, adhesive) is filled in gap between the inner ring fixed part 60 of shell 3.

In the 5th process, as shown in Figure 10, by the inner ring (retainer plate) 21 of bearing 11 by inner housing 3 and inner ring compressed part Part 29 clamps, and is fastened with multiple bolt 35b, and thus the inner ring (retainer plate) 21 of bearing 11 is fixed in the axial direction and supports (the step ST105 of Fig. 5).Then, the filler solidification filled in the gap between bearing 11 and inner housing 3, and make bearing 11 are fixed on inner housing 3.

In addition, the example that filler is filled in the gap between bearing 11 and inner housing 3 is described in the above description, But bearing 11 and the fixing means of inner housing 3 are without being limited thereto, and other known fixing means also can be used.In addition, by Inner housing 3 and inner ring compacting part 29 clamp the inner ring (retainer plate) 21 of bearing 11 and are fastened energy with multiple bolt 35b In the case where enough obtaining enough fixing intensities, without furthermore with filler or other fixing means.

In this way, in the present embodiment, the outer of the output shaft side end of rotor flange 5 has been inhibited in the second step The deviation of radial width between the inner peripheral surface of the inner ring (retainer plate) 21 of circumferential surface and bearing 11, therefore even if bearing 11 inner ring The interval in the gap between (retainer plate) 21 and the inner ring fixed part 60 for being formed in inner housing 3 generates deviation, theoretically can also be with Say the running accuracy that will not influence DD motor 10.

Then, rotary transformer stator 35 is integrally installed at by bolt 35a and is formed in inner ring compacting part 29 The rotary transformer stator fixed part 29a of outer peripheral surface, and mounting cup 31, base station 1 etc. are completed DD motor 10 (Fig. 1 reference).Separately Outside, the set-up time of rotary transformer stator 35 is not limited to after the 5th process, such as can also be before the 5th process, in advance Form the state that rotary transformer stator 35 is installed on to inner ring compacting part 29.It is fixed that the present invention is not limited to above-mentioned rotary transformers The installation method of son 35.

In addition, the structural body (rotor flange, inner housing, bearing, inner ring compacting part etc.) of usually DD motor is by magnetic Property material constitute.In contrast, rotary transformer 27 is to detect rotor flange 5 by carrying out magnetic strength survey as described above The device of rotary angle position, therefore unroll may be to the rotary angle position of rotor flange 5 for the magnetic line of force from motor part 9 Detection accuracy generate adverse effect.

Here, such as in the structure that the structural body for constituting fixed part is made of an inner shell member, in order to avoid warp It is unrolled generated influence, is needed via it by the magnetic line of force from motor part for the inner shell member being made of magnetic material Rotary transformer stator is installed on inner shell member by his installing component being made of non-magnetic material etc..

In the present embodiment, as described above, clamped together by inner housing 3 and with the inner housing 3 bearing 11 by non- The inner ring compacting part 29 that magnetic material is constituted constitutes fixed part, also, insert inner housing 3 and inner ring compacting part 29 are consolidated Fixed bolt 35b is different from for rotary transformer stator 35 to be fixed on to the bolt 35a of inner ring compacting part 29 another Component.That is, being the structure for not generating conducting between the inner housing 3 being made of magnetic material and rotary transformer stator 35.

Thereby, it is possible to inhibit due to unrolling from the magnetic line of force of motor part 9 to the rotary angle position of rotor flange 5 Detection accuracy generate influence, so as to improve rotor flange 5 rotary angle position detection accuracy.Further, since not It needs that other component is arranged between rotary transformer stator 35 and inner ring compacting part 29, so being able to suppress rotary transformer The deviation of the installation site of stator 35, so as to further increase rotor flange 5 rotary angle position detection accuracy.This Outside, rotor flange 5 is also to be made of single component, can generally cut down the number of components for constituting DD motor 10, therefore The cost and production cost of DD motor 10 can be further decreased.

Figure 11 is the schematic structural diagram using the check device 100 of DD motor 10 of the present embodiment.DD is electronic The upper end of the rotor flange 5 of machine 10 and disk-shaped workbench 80 link, and by the movement of rotor flange 5, revolve workbench 80 Turn.It is separated in the edge part of the workbench 80 and is equally spaced apart configuration inspection object (conveying object) 81.In this configuration, pass through The operating of DD motor 10 rotates inspection object 81 together with workbench 80 and is conveyed, and has DD motor so constituting 10 and workbench 80 conveying device.In addition, the top in the edge part of workbench 80 is configured with video camera (inspection portion) 82, For observing each inspection object 81 for rotating (conveying) together with workbench 80 one by one.Also, it is clapped by the video camera 82 It takes the photograph, thus, it is possible to be checked based on shooting image inspection object 81.Using the structure, can be improved inspection object 81 are moved to the position precision when lower section of video camera 82, and can be realized the miniaturization of check device 100.

Figure 12 is the schematic structural diagram using the lathe 101 of DD motor 10 of the present embodiment.DD motor 10 Rotor flange 5 upper end and disk-shaped workbench 80 link, by the movement of rotor flange 5, rotate workbench 80.In The edge part of the workbench 80, which separates, is equally spaced apart configuration workpiece (object) 91.In addition, on the side of workbench 80 Edge for example configures charging manipulator (processing department), is used to implement to load as new component 92,93 to workpiece 91 Processing, the rotation for capableing of cooperating platform 80 are implemented to process to workpiece 91.Using the structure, can be improved processing pair It is moved to the position precision when position of charging manipulator as object 91, and realizes the miniaturization of lathe 101.

As described above, according to the present embodiment, DD motor 10 includes: motor part 9, with stator 13 With the rotor 15 that can be rotated relative to the stator 13；Inner housing (first shell) 3, is fixed with stator 13；Rotor flange (the Two shells) 5, it configures in the outside of inner housing (first shell) 3, and be fixed with rotor 15；Bearing 11, by rotor flange (second shell) 5 is so that it is supported relative to the free mode of the rotation of inner housing (first shell) 3；Inner ring compacting part is (fixed Enclose compacting part) 29, clamp the inner ring (retainer plate) 21 of bearing 11 in the axial direction together with inner housing (first shell) 3；With And rotary transformer 27, it is used to detect the rotation status of motor part 9.When manufacturing the DD motor 10, by bearing 11 Outer ring (rotation circle) 23 is embedded into the outer ring fixed part 50 for being formed in rotor flange (second shell) 5, in the outer ring (rotation of bearing 11 Turn-take) 23 and be formed in rotor flange 5 outer ring fixed part 50 between gap in fill filler (such as molding agent, bonding Agent), and outer ring compacting part 53 is installed, by outer ring (rotation is enclosed) 23 of bearing 11 in the axial direction by 53 He of outer ring compacting part In the state that the flange part 51 of rotor flange 5 clamps, the periphery of the output shaft side end of rotor flange 5 is provided using fixture 300 Radial width A between the inner peripheral surface of the inner ring (retainer plate) 21 of face and bearing 11, and be fixed until being filled in bearing Until filler solidification in gap between 11 outer ring 23 and the outer ring fixed part 50 for being formed in rotor flange 5.As a result, can Enough inhibit the diameter between the outer peripheral surface of the output shaft side end of rotor flange 5 and the inner peripheral surface of the inner ring (retainer plate) 21 of bearing 11 To the deviation of width, so as to improve the running accuracy of DD motor 10.

In addition, according to the present embodiment, rotary transformer 27 include rotary transformer rotor 33 and with the rotation transformation Device rotor 33 is opposed to the rotary transformer stator 35 of configuration, provides the output shaft side end of rotor flange 5 using fixture 300 Radial width W1 between outer peripheral surface and the inner peripheral surface of rotary transformer rotor 33, rotary transformer rotor 33 is directly fixed on Rotary transformer stator 35 is directly fixed on inner ring compacting part (retainer plate compacting part) by rotor flange (second shell) 5 29.Therefore, to rotor flange (due to being able to suppress the position deviation because of rotary transformer rotor 33 and rotary transformer stator 35 Two shells) 5 rotary angle position detection accuracy generate influence, so as to accurately detect the rotation of motor part 9 Turn state.Furthermore it is possible to inhibit constitute DD motor 10 number of components increase, so as to cut down DD motor 10 at Sheet and production cost.

In addition, according to the present embodiment, inner ring compacting part (retainer plate compacting part) 29 is made of non-magnetic material, by This is also able to suppress due to the magnetic line of force from motor part 9 wraps to rotary transformer stator 35 to rotor flange (second shell Body) 5 rotary angle position detection accuracy generate influence, so as to more precisely detect the rotation of motor part 9 State.

In addition, according to the present embodiment, rotary transformer 27 is the opposite position for detecting rotor 15 relative to stator 13 The single rotary transformer of the increment type of shifting.Therefore, the axial height size that can reduce shell 7, can be realized DD motor 10 miniaturization in the axial direction.

In addition, according to the present embodiment, comprising: power factor test section 41, detection power on to motor part 9 When power factor be 0 position；And commutation control unit 43, the position for being 0 according to power factor and from rotary transformer 27 The signals of rotating transformer of output controls the commutation of the motor part 9.Using this structure, in changing for detection motor current Absolute type rotary transformer is not needed when phase timing.It therefore, there is no need to carry absolute type rotary transformer and increment type rotation Change both rotation detectors of depressor, and single rotating transformer structures can be used.Therefore, it can accurately detect The rotation status of motor part 9, and it is able to suppress the axial height of DD motor 10.

In addition, according to the present embodiment, motor part 9, bearing 11 and rotary transformer 27 are arranged in the axial direction of bearing 11 Column configuration.Thereby, it is possible to inhibit the enlargement radially centered on rotary shaft S, the setting of DD motor 10 can be reduced Area (so-called occupied area).

In addition, according to the present embodiment, rotor flange (second shell) 5 has: flange part 51, in the outer ring of bearing 11 An axial end face side 23a for (rotation circle) 23 extends；And outer ring compacting part (rotation circle compacting part) 53, it is configured in The side axial other end 23b of outer ring (rotation circle) 23.Using this structure, turn even if contingency is filled in bearing 11 and is formed in When the bonding force decline of the filler in gap between the outer ring fixed part 50 of sub- flange (second shell) 5, can also it prevent Rotor flange (second shell) 5 falls off.

In addition, according to the present embodiment, rotor flange (second shell) 5 is shaped generally as cylindrical shape, and is in axis Seamless integral structure upwards.Using this structure, it is enlarged in the axial direction to be able to suppress rotor flange (second shell) 5, and And can bearing support 11, so as to realize the miniaturization of DD motor 10.

More than, embodiment is illustrated, but embodiment is not limited to above content.In addition, in this embodiment party What is illustrated in formula is the structure for having single bearing 11, even if being that the structures of multiple bearings is applied in combination (to be also included within axis Hold the case where distance member is provided between bearing) it can also obtain same effect.

Claims (11)

1. a kind of manufacturing method of direct drive motor, the direct drive motor have: motor part, with stator with And the rotor that can be rotated relative to the stator；First shell is fixed with the stator；Second shell is configured described The outside of first shell, and it is fixed with the rotor；Bearing, by the second shell so that it is relative to the first shell Body rotates free mode and supports；Retainer plate compacting part clamps the bearing in the axial direction together with the first shell Retainer plate；And rotation detector, it is used to detect the rotation status of the motor part, the direct drive motor Manufacturing method is characterised by comprising:

In the axial specified position of the second shell, multiple permanent magnets of the rotor will be constituted circumferentially between regulation Every in the process for concentrically configuring and fixing；

The rotation circle of the bearing is embedded into the second shell, between the rotation circle and the second shell of the bearing Gap in fill filler, and the inner peripheral surface of the retainer plate using the outer peripheral surface and the bearing for defining the second shell Between radial width the process that is fixed of fixture；

In the axial specified position of the outer peripheral surface of the first shell, multiple motor iron-cores of the stator will be constituted along week To at predetermined intervals in the process for concentrically configuring and fixing；

The first shell is inserted into the process of the retainer plate of the bearing；And

The retainer plate of the bearing is clamped by the first shell and the retainer plate compacting part, and it is fixed in the axial direction described in The process of the retainer plate of bearing,

The fixture is characterised by comprising:

Circular groove portion is embedded in for the second shell；And

Columned protrusion is inserted in for the retainer plate of the bearing,

The groove portion of the annular shape includes:

Peripheral side wall surface, centered on the rotary shaft of the motor part；And

Inner circumferential side wall surface, radius are less than the radius of the peripheral side wall surface,

The radial width that the groove portion of the annular shape is configured to the groove portion of the annular shape is greater than the output shaft side of the second shell The radial width of end, and the periphery face contact of the output shaft side end of the peripheral side wall surface and the second shell, should The bottom of circular groove portion is contacted with the axial end face of the output shaft side end of the second shell,

The columned protrusion has the periphery wall surface centered on the rotary shaft of the motor part,

The columned protrusion is configured to the output shaft side from the bottom surface of the groove portion of the annular shape to the columned protrusion The height of end is greater than from the axial end face of the output shaft side end of the second shell to the output shaft side end face of the bearing Height, the inner circumferential face contact of the retainer plate of the periphery wall surface and the bearing,

By between the peripheral side wall surface of the groove portion of the annular shape and the periphery wall surface of the columned protrusion Radial distance, it is specified that radial width between the inner peripheral surface of the retainer plate of the outer peripheral surface of the second shell and the bearing.

2. the manufacturing method of direct drive motor according to claim 1, it is characterised in that:

In the direct drive motor, the rotation detector includes rotary transformer rotor and turns with the rotary transformer Son is opposed to the rotary transformer stator of configuration,

The manufacturing method of the direct drive motor further include:

The process that the rotary transformer rotor is directly fixed on the second shell；And

The process that the rotary transformer stator is directly fixed on the retainer plate compacting part.

3. the manufacturing method of direct drive motor according to claim 2, which is characterized in that further include:

The rotary transformer rotor is embedded into the second shell, and using define the outer peripheral surface of the second shell with The process that the fixture of radial width between the inner peripheral surface of the rotary transformer rotor is fixed.

4. the manufacturing method of direct drive motor according to claim 1, it is characterised in that:

The retainer plate compacting part of the direct drive motor is made of non-magnetic material.

5. the manufacturing method of direct drive motor according to claim 1, it is characterised in that:

The rotation detector of the direct drive motor is for detecting the rotor relative to the opposite of the stator The single rotary transformer of the increment type of displacement.

6. the manufacturing method of direct drive motor according to claim 5, it is characterised in that:

The direct drive motor has:

Power factor test section detects the position that power factor is 0 when powering on to the motor part；And

Commutation control unit, the position for being 0 according to the power factor and the increment information exported from the rotary transformer To control the commutation of the motor part.

7. the manufacturing method of direct drive motor according to claim 1, it is characterised in that:

In the direct drive motor, the axis of the motor part, the bearing and the rotation detector in the bearing It is arranged upwards.

8. the manufacturing method of direct drive motor according to claim 1, it is characterised in that:

In the direct drive motor, the second shell has:

Flange part extends in an axial end surface side of the rotation circle of the bearing；And

Rotation circle compacting part, configures in another axial end surface side of the rotation circle.

9. the manufacturing method of direct drive motor according to claim 1, it is characterised in that:

In the direct drive motor, the second shell is shaped generally as cylindrical shape, and is the nothing in the axial direction The integral structure of seam.

10. a kind of fixture is used in the manufacturing method of direct drive motor, which has: motor Portion, with stator and the rotor that can be rotated relative to the stator；First shell is fixed with the stator；Second shell Body configures in the outside of the first shell, and is fixed with the rotor；Bearing, by the second shell so that its Free mode is rotated relative to the first shell to support；Retainer plate compacting part, in axis together with the first shell Clamp up the retainer plate of the bearing；And rotation detector, it is used to detect the rotation status of the motor part, it is described Fixture is characterised by comprising:

Circular groove portion is embedded in for the second shell；And

Columned protrusion is inserted in for the retainer plate of the bearing,

The groove portion of the annular shape includes:

Peripheral side wall surface, centered on the rotary shaft of the motor part；And

Inner circumferential side wall surface, radius are less than the radius of the peripheral side wall surface,

The radial width that the groove portion of the annular shape is configured to the groove portion of the annular shape is greater than the output shaft side of the second shell The radial width of end, and the periphery face contact of the output shaft side end of the peripheral side wall surface and the second shell, should The bottom of circular groove portion is contacted with the axial end face of the output shaft side end of the second shell,

The columned protrusion has the periphery wall surface centered on the rotary shaft of the motor part,

The columned protrusion is configured to the output shaft side from the bottom surface of the groove portion of the annular shape to the columned protrusion The height of end is greater than from the axial end face of the output shaft side end of the second shell to the output shaft side end face of the bearing Height, the inner circumferential face contact of the retainer plate of the periphery wall surface and the bearing,

By between the peripheral side wall surface of the groove portion of the annular shape and the periphery wall surface of the columned protrusion Radial distance, it is specified that radial width between the inner peripheral surface of the retainer plate of the outer peripheral surface of the second shell and the bearing.

11. fixture according to claim 10, it is characterised in that:

In the direct drive motor, the rotation detector includes rotary transformer rotor and turns with the rotary transformer Son is opposed to the rotary transformer stator of configuration,

By the radial distance between the inner circumferential side wall surface and the peripheral side wall surface of the groove portion of the annular shape, it is specified that institute State the radial width between the outer peripheral surface of second shell and the inner peripheral surface of the rotary transformer rotor.