CN100499324C - Stepping motor and method of manufacturing the same - Google Patents
Stepping motor and method of manufacturing the same Download PDFInfo
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- CN100499324C CN100499324C CNB2004800182004A CN200480018200A CN100499324C CN 100499324 C CN100499324 C CN 100499324C CN B2004800182004 A CNB2004800182004 A CN B2004800182004A CN 200480018200 A CN200480018200 A CN 200480018200A CN 100499324 C CN100499324 C CN 100499324C
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Abstract
The present invention provides a stepping motor and a method of producing the motor, where the number of parts and assembly man-hour can be reduced. A stepping motor (1) has a bobbin (22) that integrally holds a yoke (2) and a connector housing (26) that is disposed at axially one end of the bobbin (22) and integrally holds a pin (25) for connecting a coil (23) wound on the bobbin (22) to an outside conductive body. The bobbin (22) and the connector housing (26) are integrally formed by resin.
Description
Technical field
The present invention relates to possess the stepper motor and the manufacture method thereof of reel and connector shell.
Background technology
As this stepper motor (stepping motor), known product for example patent documentation 1 (spy opens flat 5～No. 284747 communiques) is described.This stepper motor possesses: shaping reel (reel) should keep magnetic pole plate (yoke) and integratedly by the ester moulding of polybutylene terephthalate (PBT) (PBT); And electric connector (connector shell), be configured in an end of this shaping reel axis direction, and should be kept for integratedly connecting the coiling (coiling) that is wound on the above-mentioned reel the end electric terminal (pin) and by PETG (PET) ester moulding, and by ultrasonic wave with above-mentioned shaping reel and the welding each other of the mutual opposed resin surface of electric connector.
Yet, in above-mentioned existing stepper motor, because shaping reel and electric connector split constitute, so there is following problem: for electric connector being fixed in the shaping reel, must be undertaken by ultrasonic fusing or additive method as mentioned above, thereby can not realize components number and the assembling minimizing in man-hour.
Patent documentation 1: the spy opens flat 5～No. 284747 communiques
Summary of the invention
The present invention can realize that to provide a kind of components number and the stepper motor and the manufacture method thereof of the minimizing of assembling man-hour are problem in view of the above problems.
In order to solve above-mentioned problem, the stepper motor of the 1st embodiment of the present invention (technical scheme 1 described stepper motor) possesses: reel is kept for constituting the yoke of magnetic circuit integratedly; And connector shell, be configured on the end of axis direction of this reel, be kept for integratedly being connected pin on the external conductor, it is characterized in that above-mentioned reel and above-mentioned connector shell utilize resin integrally formed being wound on coiling on the above-mentioned reel.
The 2nd embodiment of the present invention (technical scheme 2 described stepper motors), in above-mentioned the 1st embodiment, it is characterized in that above-mentioned reel has flange part, it is to the outstanding winding position with the above-mentioned coiling of restriction on above-mentioned axis direction in the radial direction outside; Above-mentioned connector shell has terminal face is set, its be configured in the above-mentioned flange part adjacency of the end of above-mentioned axis direction in the above-mentioned reel, and be formed on the radial direction inner side with respect to the outer peripheral edges of this flange part; Above-mentioned pin formation as described below: one end thereof becomes that from above-mentioned terminal face to be set outstanding, the portion of terminal that connects above-mentioned coiling end, and with approaching above-mentioned terminal face is set by this portion of terminal of bending, make the whole above-mentioned portion of terminal that comprises above-mentioned coiling connecting portion with respect to the outer peripheral edges of above-mentioned flange part, be positioned at the position of radial direction inboard, above-mentioned terminal be provided with face and and this terminal be provided with between the above-mentioned flange part of face adjacency, be provided with auxiliary reel portion, it is provided with face with respect to above-mentioned terminal and is formed on the radial direction inner side, and the coiling that is connected on the above-mentioned portion of terminal can be wound thereon.
The 3rd embodiment of the present invention (technical scheme 3 described stepper motors), in above-mentioned the 1st embodiment, it is characterized in that above-mentioned reel has flange part, it is to the outstanding winding position with the above-mentioned coiling of restriction on above-mentioned axis direction in the radial direction outside; Above-mentioned connector shell has terminal face is set, its be configured in the above-mentioned flange part adjacency of the end of above-mentioned axis direction in the above-mentioned reel, and be formed on the radial direction inner side with respect to these flange part outer peripheral edges; Above-mentioned pin formation as described below: one end thereof become from above-mentioned terminal be provided with face outstanding, connect the portion of terminal of above-mentioned coiling end, and the upper end that comprises the connecting portion of above-mentioned coiling in this portion of terminal is positioned at the position of radial direction inboard with respect to the outer peripheral edges of above-mentioned flange part.
The 4th embodiment of the present invention (technical scheme 4 described stepper motors), in above-mentioned the 3rd embodiment, it is characterized in that, above-mentioned terminal be provided with face and and this terminal be provided with between the above-mentioned flange part of face adjacency, auxiliary reel portion is set, it is provided with face with respect to above-mentioned terminal and is formed on the radial direction inner side, and the coiling that is connected on the above-mentioned portion of terminal can be wound thereon.
The 5th embodiment of the present invention (manufacture methods of technical scheme 5 described stepper motors), above-mentioned the 1st～the 4th each described stepper motor of embodiment, in the manufacture method, it is characterized in that the resin by continuous supply is shaped above-mentioned reel and above-mentioned connector shell integratedly.
The 6th embodiment of the present invention (manufacture methods of technical scheme 6 described stepper motors), in the manufacture method of above-mentioned the 1st～the 4th each described stepper motor of embodiment, it is characterized in that, after with above-mentioned reel ester moulding, thereby itself and this reel is become one above-mentioned connector shell ester moulding.
The 7th embodiment of the present invention (manufacture methods of technical scheme 7 described stepper motors), in the manufacture method of above-mentioned the 1st～the 4th each described stepper motor of embodiment, it is characterized in that, after with above-mentioned connector shell ester moulding, thereby itself and this connector shell is become one above-mentioned reel ester moulding.
The 8th embodiment technical scheme 8 described stepper motors of the present invention), it is characterized in that possessing: the reel that is wound with coiling; Above-mentioned yoke, the end face setting from the inner peripheral surface of this reel along the axis direction of this reel; And casing, mode with the outer circumferential side that surrounds this yoke, above-mentioned reel and above-mentioned coiling forms tubular, and be close to above-mentioned yoke outer peripheral edges and constitute magnetic circuit with this yoke, on above-mentioned casing, on an end of axis direction, be provided with being connected to motor and be provided with under the state of parts and the flange that parts link be set with this motor.
In addition, the 8th embodiment of the present invention in each, also can have following formation: " possess: the reel that is wound with coiling in above-mentioned the 1st～the 4th embodiment; The above-mentioned yoke that end face from the inner peripheral surface of this reel along the axis direction of this reel is provided with; And casing, mode with the outer circumferential side that surrounds this yoke, above-mentioned reel and above-mentioned coiling forms tubular, and be close to above-mentioned yoke outer peripheral edges and constitute magnetic circuit with this yoke, on above-mentioned casing, on an end of axis direction, be provided with being connected to motor and be provided with under the state of parts and the flange that parts link be set with this motor.”
The 9th embodiment of the present invention (technical scheme 9 described stepper motors), in above-mentioned the 8th embodiment, it is characterized in that, be wound with the reel of above-mentioned coiling, above-mentioned yoke and above-mentioned casing, in making above-mentioned flange, be provided with under the state that the bearing surface of parts butt exposes, link by the resin one with said motor.
In addition, the 9th embodiment of the present invention, in each or above-mentioned the 8th embodiment of above-mentioned the 1st～the 4th embodiment, also can have following formation: " reel of the above-mentioned coiling of reeling, above-mentioned yoke and above-mentioned casing; in making above-mentioned flange, be provided with under the state that the bearing surface of parts butt exposes, link by the resin one with said motor.”
The 10th embodiment of the present invention (technical scheme 10 described stepper motors) possesses: the reel that is wound with coiling; The yoke of surrounding this reel and being provided with; And cooling mechanism, one end thereof is close to above-mentioned yoke, is being connected to motor and is provided with and is attached at this motor under the state of parts flange on the parts is set being provided with on another end, it is characterized in that, be wound with the reel of above-mentioned coiling, above-mentioned yoke and above-mentioned cooling mechanism, in making above-mentioned flange, be provided with under the state that the bearing surface of parts butt exposes, link by the resin one with said motor.
In addition, the 10th embodiment of the present invention in each of above-mentioned the 1st～the 4th embodiment, also can have following formation: " possess: the reel that is wound with coiling; The yoke of surrounding this reel and being provided with; And cooling mechanism, one end thereof is close to above-mentioned yoke, is being connected to motor and is provided with and is attached at this motor under the state of parts flange on the parts is set being provided with on another end, it is characterized in that being wound with the reel of above-mentioned coiling, above-mentioned yoke and above-mentioned cooling mechanism, in making above-mentioned flange, be provided with under the state that the bearing surface of parts butt exposes, link by the resin one with said motor.。”
The stepper motor of the 11st embodiment of the present invention (technical scheme 11 described stepper motors), possess: the yoke of magnetic material system has along the magnetic pole piece of the inner peripheral surface configuration of the reel that is wound with coiling with along the plate-like portion of the end face configuration of above-mentioned reel axis direction; Casing with magnetic material system, has the cylindrical portion that under the above-mentioned plate-like portion in this yoke being configured in inboard state, is entrenched on these plate-like portion outer peripheral edges, and and above-mentioned yoke constitute the part of magnetic circuit together, it is characterized in that, on the outer peripheral edges of above-mentioned plate-like portion, setting is the concavity portion of recessed shape with respect to these outer peripheral edges, on above-mentioned cylindrical portion, is provided with the binding recess that the above-mentioned concavity portion of submerging forms under the state of the outer peripheral edges that are embedded in above-mentioned plate-like portion.
In addition, the 11st embodiment of the present invention, in each or the above-mentioned the 8th or the 9th embodiment of above-mentioned the 1st～the 4th embodiment, also can have following formation: possess: the yoke of magnetic material system has along the magnetic pole piece of the inner peripheral surface configuration of the reel that is wound with coiling with along the plate-like portion of the end face configuration of above-mentioned reel axis direction; Casing with magnetic material system, has the cylindrical portion that under the above-mentioned plate-like portion in this yoke being configured in inboard state, is entrenched on these plate-like portion outer peripheral edges, and and above-mentioned yoke constitute the part of magnetic circuit together, it is characterized in that, on the outer peripheral edges of above-mentioned plate-like portion, setting is the concavity portion of recessed shape with respect to these outer peripheral edges, on above-mentioned cylindrical portion, is provided with the binding recess that the above-mentioned concavity portion of submerging forms under the state of the outer peripheral edges that are embedded in above-mentioned plate-like portion.”
The stepper motor of the 12nd embodiment of the present invention (technical scheme 12 described stepper motors), has stator, the rotor rotation is plugged in the said stator freely, axle is screwed on the above-mentioned rotor in the mode that can freely advance and retreat along its axis direction, the Be Controlled body is installed in the front end of above-mentioned axle, on above-mentioned Be Controlled body, form the restrained portion of rotation of non-circular cross sectional shape, and on said stator, form rotation condition portion to be embedded in this form of rotating restrained portion, it is characterized in that, the abrasion that the tubular that has flange is installed in the rotation condition portion of said stator reduce the axis direction latch for printed circuit, the restrained portion of the rotation of above-mentioned Be Controlled body slides with respect to the cylindrical portion that these abrasion reduce the axis direction latch for printed circuit, thereby and above-mentioned Be Controlled body be connected to the flange part that abrasion reduce the axis direction latch for printed circuit backward movement of above-mentioned axle stopped.
In addition, the stepper motor of the 12nd embodiment of the present invention, in each of each or above-mentioned 8-the 11st embodiment of above-mentioned the 1st～the 4th embodiment, also can have following formation: " have stator; rotor rotation is plugged in the said stator freely; axle is screwed on the above-mentioned rotor in the mode that can freely advance and retreat along its axis direction; the Be Controlled body is installed in above-mentioned front end; the restrained portion of rotation of formation non-circular cross sectional shape on above-mentioned Be Controlled body; and on said stator, form rotation condition portion to be embedded in this form of rotating restrained portion, it is characterized in that, the abrasion that the tubular that has flange is installed in the rotation condition portion of said stator reduce the axis direction latch for printed circuit, the restrained portion of the rotation of above-mentioned Be Controlled body slides with respect to the cylindrical portion that these abrasion reduce the axis direction latch for printed circuit, thereby and above-mentioned Be Controlled body be connected to the flange part that abrasion reduce the axis direction latch for printed circuit backward movement of above-mentioned axle stopped.”
Moreover, as above-mentioned Be Controlled body, can enumerate for example valve body of valve.Moreover, can consider two D shearing sections shape etc. as non-circular cross sectional shape.
The 13rd embodiment of the present invention (technical scheme 13 described stepper motors) in above-mentioned the 12nd embodiment, is characterized in that, in the edge portion that forms tubular on the above-mentioned Be Controlled body in case cover at least above-mentioned abrasion reduce the axis direction latch for printed circuit around.
In addition, the 13rd embodiment of the present invention, in each of each or above-mentioned the 8th～the 12nd embodiment of above-mentioned the 1st～the 4th embodiment, also can have following formation: " form the edge portion of tubular on the above-mentioned Be Controlled body in case cover at least above-mentioned abrasion reduce the axis direction latch for printed circuit around.”
According to the 1st～the 4th embodiment of the present invention, owing to make reel and connector shell integrally formed by resin, so with possess reel and connector shell respectively separately, and wait the existing product that connects reel and connector shell to compare by ultrasonic fusing during assembling, can realize components number and the assembling minimizing in man-hour.
Moreover, compare with fetch the existing situation that is connected reel and connector shell by ultrasonic wave, do not produce the worry of the intensity decreases that failure welding brings at the connecting portion of reel and connector shell, can realize the raising of reliability on the intensity.And then, owing to do not have high-octane ultrasonic vibration to act on the generation of reel and connector shell, so do not make reel and connector shell produce damaged worry by this ultrasonic vibration yet.And then, though it is higher to be used for machine (ultrasonic wave is met sb. at the airport) price general charged of ultrasonic fusing,, reduce so can realize the cost of its appropriate section owing to do not need to use the ultrasonic wave of such high price to meet sb. at the airport.
According to the 2nd embodiment of the present invention,, become this coiling and be stabilized the state that remains on auxiliary reel portion by coiling being wound on auxiliary reel portion.Therefore, can be easily from reel towards the upper end end of coiling of the root of portion of terminal.That is, can be easily the end of coiling be pricked in portion of terminal, moreover, remain on auxiliary reel portion because coiling is stable, also become easy on the reel so coiling is wound on.
Moreover, extend to the auxiliary reel portion of lower position and be wound on state in this auxiliary reel portion because coiling becomes from the root of portion of terminal, so will wind the line for example solder after portion of terminal, even it is provided with under the state of face near terminal, also can prevent to relax from the coiling that portion of terminal is extended from this portion of terminal of its root bending as far as possible.Therefore, can prevent that the slack that winds the line is clipped in portion of terminal and terminal and is provided with between the face and is cut off, cover layer that maybe should coiling is by strip off, and the coiling and the portion of terminal of its strip off part form short circuit.
Moreover, after with the portion of terminal bending, the connecting portion that forms in portion of terminal owing to the solder that will wind the line as mentioned above is than the position of the more close radial direction of flange part outer peripheral edges inboard, so when the outer peripheral edges along the reel flange part for example cover with casing, can prevent that the connecting portion of portion of terminal or its coiling from contacting with casing.
In addition, in order to prevent to go up working tension to coiling, preferably with portion of terminal to auxiliary reel portion side, be flange part lateral bending song.
Moreover, the connection of coiling on portion of terminal is except above-mentioned solder, also can carry out reliably by welding such as electric arc, plasma, laser, the portion of terminal that comprises the connecting portion that produces by this welding, by from this portion of terminal of its root bending so that it is provided with face near terminal, also with respect to the outer peripheral edges of flange part, be positioned at the inner side of radial direction.
According to the 3rd embodiment of the present invention, the end is pricked after portion of terminal winding the line, for example weld by upper end side from portion of terminal, constitute coiling is connected connecting portion on the upper end of this portion of terminal, but because the upper end that comprises the portion of terminal of this connecting portion constitutes the inner side that is positioned at radial direction with respect to the outer peripheral edges of the flange part of reel, make it near terminal face is set so need not jogged terminal end portion, the upper end of portion of terminal that just can prevent to comprise connecting portion is outstanding from the outer peripheral edges of flange part.Therefore, can realize the minimizing in the crooked man-hour that needs.
And, owing to do not need to the bent portion of terminal of the flange part lateral bending of reel, so no longer need the required axis direction space of this bending.Therefore, can reduce the corresponding axis direction length in above-mentioned space, so can realize the miniaturization of stepper motor.
According to the 4th embodiment of the present invention, the 3rd embodiment with respect to the invention described above, because for the formation of auxiliary reel portion is set between the flange part that at terminal face is set and is adjacent, so reel and remain under the state of auxiliary reel portion will winding the line, can easily the end that should wind the line be pricked in portion of terminal, or it easily is wound on the reel.
According to the 5th embodiment of the present invention, under yoke and pin being inserted the state that makes in the mould that reel and connector shell be shaped, by in this mould, supplying with continuously resin, can make the reel of the state that keeps yoke integratedly and keep the connector shell of state of pin roughly simultaneously integrally formed integratedly.Therefore, can the short time cheaply make excellent strength and do not have the problems such as breakage that cause by ultrasonic vibration etc., the product that reliability is high.
According to the 6th embodiment of the present invention, under the state that yoke is inserted in the mould that makes the reel shaping,, the reel of the state that keeps yoke integratedly is shaped by in this mould, providing resin.In addition, after reel is shaped, make under the state in the mould that connector shell is shaped this reel and pin being inserted (insert), by in this mould, providing resin, the connector shell that can be shaped and become one with reel and keep the state of pin integratedly.
Therefore, require a large amount of production at reel as common component, connector shell requires under the situation of Multi-varieties and Small-batch Production according to purposes etc., use for example a plurality of ester moulding machines to produce in a large number about reel, use minority ester moulding machine insertions such as reel to be shaped on one side on one side about connector shell, can realize the raising of production efficiency thus.Promptly, because connector shell is a Multi-varieties and Small-batch Production, even so become in the integral body that constitutes by reel and connector shell under the situation of Multi-varieties and Small-batch Production, also its part allotment can be produced to a large amount of, so can realize the raising of production efficiency, can realize the reduction of cost thus.
According to the 7th embodiment of the present invention, under will selling the state that inserts in the mould that makes the connector shell shaping,, the connector shell of the state that keeps pin integratedly is shaped by in this mould, providing resin.In addition, after connector shell is shaped, under this connector shell and yoke being inserted the state that makes in the mould that reel is shaped, by in this mould, providing resin, the reel that can be shaped and become one with connector shell and keep the state of yoke integratedly.
Therefore, require a large amount of production at connector shell as common component, reel requires under the situation of Multi-varieties and Small-batch Production according to purposes etc., use for example a plurality of ester moulding machines to produce in a large number about connector shell, use minority ester moulding machine insertions such as connector shell to be shaped on one side on one side about reel, can realize the raising of production efficiency thus.Promptly, because reel is a Multi-varieties and Small-batch Production, even so become in the integral body that constitutes by reel and connector shell under the situation of Multi-varieties and Small-batch Production, also its part allotment can be produced to a large amount of, so can realize the raising of production efficiency, can realize the reduction of cost thus.
According to the of the present invention the 8th and the 9th embodiment, even stream has electric current all the time in coiling, all the time produce from this coiling under the situation of Joule heat, its heat also is passed to yoke via reel, and then be passed to casing, moreover the heat that produces in coiling directly is passed to the casing that surrounds periphery as radiant heat.In addition, be passed to the heat of casing, the motor that can be expelled to this flange butt via the flange of this casing is provided with parts.
Therefore, because the heat dispersion of the heat that produces in coiling improves, rise so can reduce the temperature of coiling itself, can prevent to dissolve the defective insulation that produces, and can prevent that reel, yoke and housing etc. from producing thermal deformations owing to the insulating coating of this coiling.And, because the coiling temperature descends,, can prevent the decline of motor characteristics such as moment of torsion so on magnet, can not produce the heat demagnetization near for example rotor of this coiling.
Therefore, the problems such as defective insulation, thermal deformation and motor characteristics deterioration that high temperature causes that can prevent to wind the line.
According to the 9th embodiment of the present invention, because reel, yoke and the casing of the coiling of reeling link by the resin one, so can obtain to possess the formation of the firm stator of these coilings, reel and casing.
Moreover, even around casing, wait under the situation about covering by above-mentioned resin, owing to be in the flange with motor the state that the bearing surface of parts butt exposes be set, thereby the heat that produces in the coiling is escaped to motor via this flange parts are set, so can prevent from around coiling and coiling, to be full of heat.
Therefore, even linking under the situation of reel, yoke and casing by the resin one, the problems such as defective insulation, thermal deformation and motor characteristics deterioration that the high temperature that also can prevent to wind the line causes.
According to the 10th embodiment of the present invention, the heat that produces in coiling is passed to yoke via reel, and directly is passed to yoke as radiant heat.In addition, be passed to the heat of yoke, be passed to the cooling mechanism of being close to this yoke, and then be expelled to motor via the flange of this cooling mechanism parts are set.
Therefore, because the heat dispersion of the heat that produces in coiling improves, even so wait around yoke or the cooling mechanism by above-mentioned resin covering, also identical with the above-mentioned the 8th or the 9th embodiment, the problems such as defective insulation, thermal deformation and motor characteristics deterioration that the high temperature that can prevent to wind the line causes.
And, because the reel, yoke and the cooling mechanism that are wound with coiling link by the resin one, so can obtain to possess the formation of the firm stator of these coilings, reel and cooling mechanism.
According to the 11st embodiment of the present invention, owing on the outer peripheral edges of the plate-like portion in yoke concavity portion is set, be arranged on the binding recess of the above-mentioned concavity portion of submerging under the state that is embedded in above-mentioned outer peripheral edges on the cylindrical portion in casing, be close to the outer peripheral edges of plate-like portion so can make the inner peripheral surface of cylindrical portion reliably
Promptly, under the state that makes the chimeric dried plate-like portion outer peripheral edges of cylindrical portion, even vacating some gaps on chimeric between the inner peripheral surface of the outer peripheral edges of plate-like portion and cylindrical portion, part by making cylindrical portion is submerged in the concavity portion of plate-like portion as linking recess, also can reduce the length of cylindrical portion circumferencial direction, can make the inner peripheral surface of cylindrical portion be close to the outer peripheral edges of plate-like portion thus.In this case, can make the concavity portion that recess also is close to plate-like portion that links.
And, become the state of the concavity portion that is sticked in plate-like portion owing to link recess, thus the state of being close between the outer peripheral edges of the inner peripheral surface of cylindrical portion and plate-like portion can be kept reliably, and can connect yoke and casing securely.
Therefore, can prevent as far as possible that the magnetic line of force of yoke and casing interface from leaking, can realize that the efficient of stepper motor improves, and can connect yoke and casing securely.
Moreover, owing to can make in the cylindrical portion part undergauge by linking recess corresponding to the plate-like portion outer peripheral edges, even so link recess less deflection takes place, also can fully dwindle the diameter of cylindrical portion inner peripheral surface, thereby the inner peripheral surface of cylindrical portion is close on the outer peripheral edges of plate-like portion securely with respect to the diameter of plate-like portion outer peripheral edges.Promptly, with compare by in cylindrical portion, forming the prior art (with reference to Figure 36) that recess is close on the outer peripheral edges of plate-like portion cylindrical portion away from the part of plate-like portion, even it is less to link the deflection inhibition ground of recess, the inner peripheral surface of cylindrical portion is close on the outer peripheral edges of plate-like portion reliably.
Therefore, after forming the binding recess, owing to the interval that also can enlarge between coiling and the casing, so the dielectric voltage withstand impedance between these coilings and the casing can be maintained sufficiently high state.In addition, in the prior art, for above-mentioned dielectric voltage withstand impedance is maintained more than the setting, perhaps reduce the winding number of coiling, perhaps increase the outer peripheral edges of plate-like portion and the diameter of cylindrical portion inner peripheral surface, but so also can need not in the present invention, produce so can prevent following drawback: the moment of torsion of the stepper motor that the winding number that is wound the line by minimizing causes reduces, or because the maximization of the stepper motor that the diameter of the outer peripheral edges of increase plate-like portion and cylindrical portion inner peripheral surface causes.
According to the of the present invention the 12nd and the 13rd embodiment, axis direction latch for printed circuit performance abrasion reduce and the axis direction card ends two functions because abrasion reduce, so reduce the existing stepper motor (with reference to Figure 39) of two parts of parts and axis direction latch for printed circuit compares with the needs abrasion, except one of components number is promptly enough, be installed in stator side owing to will wear away reduction axis direction latch for printed circuit, so reduce parts to be installed in the existing stepper motor of valve body side different with will wearing away, because even the stroke of axle is longer, need be corresponding to the cylindrical portion of its length lengthening abrasion reduction axis direction latch for printed circuit, so can reduce the material cost of stepper motor yet.And, be installed in stator side owing to will wear away reduction axis direction latch for printed circuit, so in the forming process of Be Controlled body, only make itself and integrally formed the getting final product of axle, therefore integrally formed with also must make abrasion reduction parts and axis direction latch for printed circuit except that axle existing stepper motor is compared, the Be Controlled body required time of shaping shortens, and can reduce the manufacturing cost of stepper motor.
According to the 13rd embodiment of the present invention, can suppress the following state of affairs and take place: for example flow through the fluid of valve that the advance and retreat by the Be Controlled body open and close etc., the gap that reduces between axis direction latch for printed circuit and the Be Controlled body by abrasion enters in the stator.
Description of drawings
Fig. 1 is for representing as the reel of the stepper motor shown in the 1st execution mode of the present invention and the cutaway view of connector shell.
Fig. 2 is the reel of this stepper motor of expression and the front view of connector shell.
Fig. 3 is the reel of this stepper motor of expression and the vertical view of connector shell.
Fig. 4 is the figure of connector shell of this stepper motor of expression, for the IV of Fig. 1 to view.
Fig. 5 A is the front view of the yoke of this stepper motor of expression.
Fig. 5 B is the sectional view of the yoke of this stepper motor of expression.
Fig. 6 is the figure of the manufacture method of this stepper motor of expression, is the front view of expression from the state of the coiling coiling end, upper end of portion of terminal.
Fig. 7 is the figure of manufacture method of this stepper motor of expression, will be wound on after coiling on the portion of terminal is wound on auxiliary reel portion for being illustrated in, and passes the front view of the state behind the groove of flange part.
Fig. 8 is the figure of manufacture method of this stepper motor of expression, will be wound on after coiling on the portion of terminal is wound on auxiliary reel portion for being illustrated in, and passes the groove of flange part, and then the front view of the state of reeling in the 1st coiling portion.
Fig. 9 is the figure of manufacture method of this stepper motor of expression, for being illustrated in being wound on after coiling on the portion of terminal is wound on auxiliary reel portion, passes the groove of flange part, and then is wound on the front view of the state in the 1st coiling portion.
Figure 10 is the figure of manufacture method of this stepper motor of expression, is expression will wind the line the state in the 2nd coiling portion of also being wound on and the front view of the state behind the upper end of portion of terminal formation connecting portion.
Figure 11 is the figure of the manufacture method of this stepper motor of expression, for expression will have the portion of terminal bending of connecting portion so that the front view of the state of face to be set near terminal.
Figure 12 is the view sub-anatomy of this stepper motor.
Figure 13 is the cutaway view of this stepper motor.
Figure 14 is the cutaway view of the example of other manufacture methods of expression reel of this stepper motor and connector shell.
Figure 15 is for representing as the reel of the stepper motor shown in the 2nd execution mode of the present invention and the cutaway view of connector shell.
Figure 16 is the reel of this stepper motor of expression and the front view of connector shell.
Figure 17 is the reel of this stepper motor of expression and the vertical view of connector shell.
Figure 18 is arranged on the reel and connector shell of this stepper motor with regular state for expression will wind the line, and the front view of the state after the upper end of portion of terminal forms connecting portion.
Figure 19 is the cutaway view of this stepper motor.
Figure 20 is the cutaway view of the example of other manufacture methods of expression reel of this stepper motor and connector shell.
Figure 21 is for representing to possess the cutaway view as the flow control valve of the stepper motor shown in the 3rd execution mode of the present invention.
Figure 22 A is the front view of the yoke of this stepper motor of expression.
Figure 22 B is the figure of yoke of this stepper motor of expression, is the cutaway view along B～B line of Figure 22 A.
Figure 23 is for having the view sub-anatomy of reel, yoke and the casing of coiling in this stepper motor.
Figure 24 is for having the cutaway view of the state of the reel of coiling and yoke in casing assembling in this stepper motor of expression.
Figure 25 is for possessing the cutaway view of the stator of coiling, reel, yoke, casing and housing in this stepper motor of expression.
Figure 26 is the front view of the outward appearance of this stepper motor of expression.
Figure 27 is the figure of the outward appearance of this stepper motor of expression, is the front view of other examples of expression housing.
Figure 28 is for representing as the view sub-anatomy that has reel, the 1st yoke, the 2nd yoke and the cooling mechanism of coiling in the stepper motor shown in the 4th execution mode of the present invention.
Figure 29 assembles the cutaway view of the state behind reel, the 1st yoke, the 2nd yoke and the cooling mechanism that has coiling in this stepper motor for expression.
Figure 30 possesses the cutaway view of the stator of coiling, reel, the 1st yoke, the 2nd yoke, cooling mechanism and housing in this stepper motor for expression.
Figure 31 is the cutaway view of expression as the stepper motor shown in the 5th execution mode of the present invention.
Figure 32 is the major part cutaway view of this stepper motor.
Figure 33 is the view sub-anatomy of this stepper motor.
Figure 34 is the figure of this stepper motor of expression, is the cutaway view along IV～IV line of Figure 31.
Figure 35 A is the front view of the yoke of this stepper motor of expression.
Figure 35 B is the sectional view of the yoke of this stepper motor of expression.
Figure 36 is the cutaway view of conduct with respect to the stepper motor of the conventional example subrepresentation of this stepper motor.
The positive view of the stepper motor that Figure 37 A represents as the 6th execution mode of the present invention for expression.
Figure 37 B is the figure of this stepper motor of expression, is the cutaway view along B～B line of Figure 37 A.
Figure 38 A is the detailed vertical view that the abrasion of this stepper motor reduce the axis direction latch for printed circuit.
Figure 38 B is the detailed front view that the abrasion of this stepper motor reduce the axis direction latch for printed circuit.
Figure 38 C is the details drawing that the abrasion of this stepper motor reduce the axis direction latch for printed circuit, is the cutaway view along C～C line of Figure 38 A.
Figure 39 A is the positive view of an example of the existing stepper motor of relative this stepper motor of expression.
Figure 39 B is the relative figure of an example of the existing stepper motor of this stepper motor of expression, is the cutaway view along B～B line of Figure 39 A.
Description of reference numerals
1 stepper motor
21 yokes
The 21b outer peripheral edges
22 reels
The 22a flange part
23 coilings
25 pins
The 25a portion of terminal
The 25c connecting portion
26 connector shells
The 26a terminal is provided with face
26b assists reel portion
100 valve bodies
101 are provided with face
The A21 coiling
The A22 reel
A23 yoke the 1st yoke (yoke)
The A23d outer peripheral edges
The A24 casing
A24b, A26b flange
A24e heat-transfer area (bearing surface)
A25,27 housings
The A26 cooling mechanism
A230 the 2nd yoke (yoke)
The B4 casing
B21 yoke (magnetic pole plate)
The B21b outer peripheral edges
B21c hollow plectane portion (plate-like portion)
The B21d magnetic pole piece
B21f concavity portion
The B22 reel
The B23 coiling
The B41 surrounding wall portion
B41a links recess
The C2 stator
C2a rotation condition portion
The C3 axle
C5 valve body (Be Controlled body)
C5a rotates restrained portion
C5b edge portion
The C9 abrasion reduce the axis direction latch for printed circuit
The C9a cylindrical portion
The C9b flange part
Embodiment
(the 1st execution mode)
On one side illustrate as the 1st execution mode that is used to implement optimal way of the present invention with reference to Fig. 1～Figure 13 on one side.
The stepper motor of in the 1st execution mode, representing 1, as Figure 12 and shown in Figure 13, for possessing the formation of stator 2, rotor 3, casing 4 and a pair of ball bearing 5, wherein this ball bearing 5 axle 31 of keeping being disposed at rotor 3 axle center parts makes it can rotate freely with respect to stator 2 and rotor 3.
The yoke 21 of Gou Chenging like this as Fig. 1～shown in Figure 3, keeps 4 parts by reel 22, and the inner peripheral surface of magnetic pole piece 21d exposes to the inside to constitute the inner peripheral surface of reel 22.Moreover, each yoke 21 is configured on the same axis, and a pair of state that the hollow plectane 21c of portion is cooperated that becomes in the middle of being positioned at is removed around each hollow plectane 21c of portion and the part of the inner peripheral surface of each magnetic pole piece 21d is covered by the resin that constitutes reel 22, and remains fixing by this resin.
Moreover, terminal be provided with face 26a and and this terminal be provided with between the flange part 22a of face 26a adjacency, be formed with the auxiliary 26b of reel portion, it is provided with face 26a with respect to terminal and is formed on the radial direction inner side, and wind the line 23 can be wound thereon.
And then on connector shell 26, the position of a side relative with reel 22 forms basic plectane 26c of portion and receptacle portion 26d successively in that face 26a is set across terminal.The basis plectane 26c of portion forms with reel 22 coaxial shape ground, and the outer peripheral edges 21b of the yoke 21 in outer peripheral face and the reel 22 forms same diameter.Receptacle portion 26d, the cross section is formed by the cylindrical shell of oblong shape roughly, have above-mentioned in the not shown external plug of contact insert wherein.
Each portion of terminal 25a, the direction with axis direction surface quadrature that is provided with among the face 26a to terminal is outstanding, along the circumferential direction become the row configuration, and upper end is separately given prominence to the outside of radial direction more than the outer peripheral edges 21b of the flange part 22a in the reel 22 and the outer peripheral face of the basic plectane 26c of portion.
Moreover each portion of terminal 25a is as Figure 10～shown in Figure 13, after 23 solders that will wind the line, to the auxiliary 26b of reel portion lateral buckling, so that face 26a to be set near terminal.That is, portion of terminal 25a becomes the state that forms the connecting portion 25c of hole enlargement by winding the line 23 solder in the upper end, but not making the integral body that comprises this connecting portion 25c with terminal face 26a is set contacts, and bends from root.Moreover under the state of this bending, the whole portion of terminal 25a that comprises connecting portion 25c constitutes the inner side that is positioned at radial direction with respect to the outer peripheral face of the outer peripheral edges 21b of the flange part 22a in the reel 22 and the basic plectane 26c of portion.In addition, the end of coiling 23 is wound on this portion of terminal 25a, so that its front end becomes the upper end side of portion of terminal 25a.
Moreover, above-mentioned each yoke 21 is assembled in the reel 22, so that notch part 21e is positioned at the position that face 26a is set corresponding to terminal, and then, be positioned on the outer peripheral edges of 2 flange part 22a that terminal is provided with face 26a side, as shown in Figure 3. in position, form a plurality of coiling 23 groove 22d that pass that are used to make corresponding to portion of terminal 25a.
Each outer contact 25b, as shown in Figure 4, along among the receptacle portion 26d roughly the longitudinally in the cross section of oblong shape be configured to row.
Moreover, on connector shell 26, as shown in figure 12, on the end face of reel 22 sides, form one the dead eye 26e that keeps in the above-mentioned a pair of ball bearing 5.This dead eye 26e forms with reel 22 coaxial shape ground.
Moreover, on the shaft core position of lid 42, form to keep another the bearing teat 42a in the above-mentioned a pair of ball bearing 5, on the end face 42b of this bearing teat 42a, form and make and through hole 42c that rotor 3 incorporate axles 31 insert and connect.Therefore, even under reel 22 and connector shell 26 incorporate states, also can pack into as described below: in reel 22, insert rotor 3, and rotate bolster 31 freely by a pair of ball bearing 5 with axle 31.
In addition, yoke 21 and casing 4 are formed by magnetics such as iron.
Next, the manufacture method of the stepper motor 1 that constitutes as mentioned above is described.
At first, when making incorporate reel 22 and connector shell 26, under above-mentioned several yokes 21 and pin 25 being inserted the state that makes in the not shown mould that these reels 22 and connector shell 26 be shaped, by in this mould, injecting continuously same resin, make the reel 22 of the state that keeps each yoke 21 integratedly and keep respectively selling the connector shell 26 of 25 state integratedly roughly simultaneously integrally formed.
In addition, as shown in Figure 6 and Figure 7, will wind the line 23 end from the upper end of portion of terminal 25a towards below root reel after, this coiling 23 guided to the auxiliary reel 26b of portion of oblique below and reels at this auxiliary reel 26b of portion from the root of portion of terminal 25a about 1～2 enclose.In addition, also can will wind the line 23 reeling on the auxiliary 26b of reel portion 1～2 the circle after, reeled towards the top from the root of portion of terminal 25a in the end of this coiling 23.In addition, as Fig. 7～shown in Figure 9, will be wound on coiling 23 on the auxiliary 26b of reel portion, guide to the 1st 22b of coiling portion, and be wound on the 1st 22b of coiling portion via groove 22d with the flange part 22a of this auxiliary reel 26b of portion adjacency.
Moreover, be wound on the coiling 23 after the 1st 22b of coiling portion goes up, groove 22d via flange part 22a guides to the auxiliary 26b of reel portion once more, behind 1～2 circle of reeling on this auxiliary reel 26b of portion, thereby ties towards front ground coiling from the root of the 25a of another terminal portion.
Thus, about other coiling 23, be wound on above-mentioned different portion of terminal 25a after, be wound on the auxiliary 26b of reel portion, as shown in figure 10, be wound on the 2nd 22c of coiling portion.In addition, with coiling 23 end solder on each portion of terminal 25a.At this moment, owing to upper end side solder, so form the connecting portion 25c of hole enlargement at the leading section of each portion of terminal 25a from portion of terminal 25a.
Then, as shown in figure 11, with each portion of terminal 25a from its root to the auxiliary 26b of reel portion lateral buckling.At this moment, make the whole portion of terminal 25a that comprises connecting portion 25c face 26a is set but be not in contact with it near terminal.
Next, as shown in figure 12, make a ball bearing 5 be embedded in the dead eye 26e of connector shell 26, and the base end part of the axle 31 in the rotor 3 is inserted this ball bearing 5.And then the periphery ground that casing 4 covers reels 22 and connector shell 26 covers it, and the leading section of axle 31 is inserted another ball bearing 5 and through hole 42c makes its perforation, and another ball bearing 5 is embedded in bearing teat 42a in the described casing 4.In addition, casing 4 is fixed in ball bearing 5 and/or connector shell 26, finishes the stepper motor 1 that one possesses connector 24 thus by fixing meanss such as binding agent, welding, screw elements.
In the stepper motor 1 and manufacture method thereof that constitute as mentioned above, because reel 22 and connector shell 26 are integrally formed by same resin, so with possess reel and connector shell respectively separately, and wait the existing product that connects reel and connector shell to compare by ultrasonic fusing during assembling, can realize components number and the assembling minimizing in man-hour.
Moreover, compare with fetch the existing situation that is connected reel and connector shell by ultrasonic wave, do not have can realize the raising of reliability on the intensity because of produce the worry of the intensity decreases that failure welding brings at the connecting portion of reel 22 and connector shell 26.And then, owing to there is not high-octane ultrasonic vibration to act on reel and connector shell, do not make reel 22 and connector shell 26 produce damaged worry by this ultrasonic vibration yet.And then the ultrasonic wave price general charged of meeting sb. at the airport is higher, but owing to do not need to use the machine of such high price, reduces so can realize the cost of its appropriate section.
And then, 23 be wound on the auxiliary 26b of reel portion by winding the line, become this coiling 23 and be stabilized the state of assisting on the 26b of reel portion that remains on.Therefore, will wind the line 23 be wound on the auxiliary 26b of reel portion after, be wound on again under the situation on the portion of terminal 25a, can easily this coiling 23 be wound on the portion of terminal 25a.Moreover, coiling 23 is wound on the 1st 22b of coiling portion of reel 22 and the 2nd 22c of coiling portion also becomes simple.
Moreover, owing to extending and be wound on to oblique below, 23 roots from portion of terminal 25a that wind the line assist on the 26b of reel portion, so will wind the line 23 solders after on the portion of terminal 25a, even bending this portion of terminal 25a and it is provided with near terminal under the situation of face 26a, also can prevent to relax from the coiling 23 that portion of terminal 25a extends from its root as far as possible.Therefore, 23 the slack of can preventing to wind the line is clipped in portion of terminal 25a or connecting portion 25c and terminal and is provided with between the face 26a and is cut off, and cover layer that maybe should coiling 23 is by strip off, and the coiling 23 of its strip off part and portion of terminal 25a or connecting portion 25c form short circuit.
Moreover, after with portion of terminal 25a bending, since connecting portion 25c be positioned at than corresponding to the outer peripheral edges of flange part 22a, be the position of more close radial direction inboard, position of the outer peripheral edges 21b of yoke 21, form short circuit so can prevent this connecting portion 25c from contacting with casing 4.
Moreover, about 23 the connections on portion of terminal 25a that wind the line,, also can carry out reliably by the welding of electric arc, plasma, laser etc. except above-mentioned solder.Moreover, about comprising the portion of terminal 25a of the connecting portion 25c that produces by this welding, by from its root bending this portion of terminal 25a so that it is provided with face 26a near terminal, also be positioned at the inner side of radial direction with respect to the outer peripheral edges 21b of flange part 22a.
Moreover, in above-mentioned the 1st execution mode, used by in the mould that reel 22 and connector shell 26 are shaped, injecting same resin continuously, the method that reel 22 and connector shell 26 roughly are shaped simultaneously, but also can be as shown in figure 14, use is after with reel 22 ester mouldings, thus the method that itself and this reel 22 is become one connector shell 26 ester mouldings again.Moreover, also can use after connector shell 26 ester mouldings, thus the method that itself and this connector shell 26 is become one reel 22 ester mouldings again.
Promptly, as after with reel 22 ester mouldings, thereby the method that itself and this reel 22 is become one connector shell 26 ester mouldings, following method is for example arranged: under the state that each yoke 21 is inserted in the mould that makes reel 22 shapings, by in this mould, injecting resin, the reel 22 of the state that keeps each yoke 21 integratedly is shaped, thereafter, this reel 22 and each are being sold under 25 states that insert in the mould that makes connector shell 26 shapings, by in this mould, injecting resin, the connector shell 26 that can be shaped and become one with reel 22 and keep respectively selling 25 state integratedly.
Under the situation of this method, require a large amount of production at reel 22 as common component, connector shell 26 requires under the situation of Multi-varieties and Small-batch Production according to purposes or client etc., use for example a plurality of ester moulding machines to produce in a large number about reel 22, using minority ester moulding machine reel 22 grades to be inserted on one side on one side about connector shell 26 is shaped, can realizes the raising of production efficiency thus.Promptly, because connector shell 26 is a Multi-varieties and Small-batch Production, even so become under the situation of Multi-varieties and Small-batch Production in the integral body of reel 22 and connector shell 26, also its part allotment can be produced to a large amount of, so can realize the raising of production efficiency, can realize the reduction of cost thus.
On the other hand, as after with connector shell 26 ester mouldings, thereby the method that itself and this connector shell 26 is become one reel 22 ester mouldings, following method is arranged: under the state that each pin 25 is inserted in the mould that makes connector shell 26 shapings, by in this mould, injecting resin, be shaped integratedly and keep respectively selling the connector shell 26 of 25 state, thereafter, under the state that this connector shell 26 and each yoke 21 are inserted in the mould that makes reel 22 shapings, by in this mould, injecting resin, the reel 22 that can be shaped and become one with connector shell 26 and keep the state of each yoke 21 integratedly.
Under the situation of this method, require a large amount of production at connector shell 26 as common component, reel 22 requires under the situation of Multi-varieties and Small-batch Production according to purposes or client etc., use for example a plurality of ester moulding machines to produce in a large number about connector shell 26, using minority ester moulding machine connector shell 26 grades to be inserted on one side on one side about reel 22 is shaped, can realizes the raising of production efficiency thus.Promptly, because reel 22 is a Multi-varieties and Small-batch Production, even so become under the situation of Multi-varieties and Small-batch Production in the integral body of reel 22 and connector shell 26, also its part allotment can be produced to a large amount of, so can realize the raising of production efficiency, can realize the reduction of cost thus.
Moreover, even reel 22 and connector shell 26 under the situation that the time is shaped with staggering as mentioned above, also preferably use same ester moulding.But also can use different resins.In this case, can use only resin respectively at reel 22 and connector shell 26.
(different modes that is used to carry out an invention)
Next, on one side illustrate on one side as being used to implement the 2nd execution mode～the 6th execution mode of different modes of the present invention with reference to accompanying drawing.
(the 2nd execution mode)
At first, with reference to Figure 15～Figure 19 the 2nd execution mode is described.Wherein, the key element identical with the inscape represented in above-mentioned the 1st execution mode used identical mark, omit its explanation.
The difference of the stepper motor of representing in stepper motor of representing in the 2nd execution mode 10 and the 1st execution mode 1 is. do not bend portion of terminal 25a, but the upper end that comprises the portion of terminal 25a of connecting portion 25c constitutes outer peripheral edges with respect to flange part 22a, be the position that the outer peripheral edges 21b of yoke 21 is positioned at the radial direction inboard.
Promptly, portion of terminal 25a, as Figure 15～shown in Figure 19, because terminal is provided with face 26a and is formed on the inner side of radial direction with respect to the outer peripheral edges of flange part 22a, the outer peripheral edges from flange part 22a are outstanding upward so comprise the upper end of portion of terminal 25a of connecting portion 25c.
Moreover, owing to do not need to bend portion of terminal 25a, to correspondingly lack and bend required part so terminal is provided with axis direction length that the axis direction length of face 26a forms the face of representing than the 1st execution mode on ground that is provided with.
In addition, the connecting portion 25c of coiling 23 as Figure 18 and shown in Figure 19, carries out arc welding by the upper end side from portion of terminal 25a among the portion of terminal 25a, is formed on the upper end of portion of terminal 25a.
In the stepper motor 10 that constitutes as mentioned above, be positioned at position owing to comprise the upper end of the portion of terminal 25a of connecting portion 25c, so need not face bending portion of terminal 25a to be set along terminal than the more close radial direction of the outer peripheral edges inboard of the flange part 22a of reel 22.Therefore, can reduce the required man-hour of bending of portion of terminal 25a.
And, because terminal is provided with the required appropriate section of bending that the axis direction length of face 26a has been lacked portion of terminal 25a, so can realize the miniaturization of stepper motor 10.
In addition, though in above-mentioned the 2nd execution mode, be connected on the portion of terminal 25a, also can connect reliably by other welding such as plasma or laser by will wind the line 23 end of arc welding.Moreover if possible, also can will be wound the line by solder 23 is connected on the portion of terminal 25a.
In above-mentioned the 2nd execution mode, as shown in figure 20, can use equally after reel 22 ester mouldings, thereby the method that itself and this reel 22 is become one connector shell 26 ester mouldings, perhaps use after connector shell 26 ester mouldings, thus the method that itself and this connector shell 26 is become one reel 22 ester mouldings.Just, about the details of these methods, since identical with the content shown in Figure 14, so omit explanation.
(the 3rd execution mode)
Below, with reference to Figure 21～Figure 26 the 3rd execution mode of the present invention is described.
Stepper motor shown in the 3rd execution mode as shown in figure 21, is installed on the valve body (motor is provided with parts) 100, so that constitute the flow control valve of regulating the flow of mist in the petrol engine.In addition, these flow control valve control idler revolutions.
Stator A2 as shown in figure 25, possesses: coiling A21; Be wound with the reel A22 of this coiling A21; Yoke A23, the axis direction end face from the inner peripheral surface of this reel A22 along this reel A22 is provided with; Casing A24, cylindric formation to be surrounding the outer circumferential side of this yoke A23, reel A22 and coiling A21, and closely is contacted with among the yoke A23 along the outer peripheral edges A23d (with reference to Figure 22 A, Figure 22 B, Figure 23) of the A23a of hollow plectane portion (flat part) of the axis direction end face of reel A22 and with this yoke A23 and constitutes magnetic circuit; With the housing A25 of ester moulding, one links this casing A24, has reel A22 and the yoke A23 of coiling A21.
Reel A22, as shown in figure 23, by cylindrical portion A22a and integrally formed to the outside of radial direction with the A22b of jaw portion, the A22b of circular extension from each end of axis direction of this cylindrical portion A22a.On the other hand, coiling A21 is wound between each A22b of jaw portion among the cylindrical portion A22a.
Yoke A23 as Figure 22 A, Figure 22 B and shown in Figure 23, is formed by magnetic plates such as iron plates, becomes to have the shape to a plurality of (this execution mode being 6) magnetic pole piece A23c of axis direction bending forming from the inner peripheral A23b of the hollow plectane A23a of portion.Moreover the outer peripheral edges A23d of the hollow plectane A23a of portion circle forms bigger than the circular outer circumference diameter of the A22b of jaw portion among the reel A22.
So the yoke A23 that constitutes is set to, as Figure 23～shown in Figure 25, the inner peripheral surface of outer peripheral face by making each magnetic pole piece A23c and the cylindrical portion A22a of reel A22 is chimeric, and hollow plectane A23a of portion and the A22b of jaw portion that constitutes reel A22 axis direction end face are close to, to sandwich this reel A22 from the axis direction both sides.In addition, because that the outer peripheral edges A23d of the hollow plectane A23a of portion forms is bigger than the outer peripheral edges diameter of the A22b of jaw portion, so be positioned at than the outer peripheral edges of the A22b of this jaw portion more by the position in the radial direction outside.
In addition, by having the coiling reel A22 of A21 and the 1st stator that pair of magnetic yoke A23 constitutes, with state that the coaxial shape of the 2nd stator of same formation overlaps under, in the insertion casing A24.
Casing A24, as shown in figure 23, form by magnetics such as iron, by the cylindrical portion A24a of the outer peripheral edges A23d that is embedded in each yoke A23 and from the end of this cylindrical portion A24a to the outside of radial direction with circular extension, and the flange A24b that is connected on the face that is provided with 101 of valve body 100 is integrally formed.On flange A24b, form the through hole A24c that along the circumferential direction uniformly-spaced makes bolt A6 (with reference to Figure 21) insert and connect.
Moreover casing A24 as shown in figure 24, under the state of insertion the above-mentioned the 1st and the 2nd stator, by with cylindrical portion A24a undergauge, is close on the outer peripheral edges A23d of each yoke A23 inner circumferential surface reliably.
Housing A25, as shown in figure 25, form by ester moulding, with covering pack into the end face side of the 1st and the 2nd axis stator direction of outer circumferential side, lamination of casing A24 of the 1st and the 2nd stator shown in Figure 24 and other end side etc., and by this ester moulding, one links reel A22, yoke A23 and the casing A24 with coiling A21.But, with the surface of the face that is provided with 101 butts of valve body 100, remove heat-transfer area (bearing surface) A24e that the resin metal covering that constitutes housing A25 exposes among the flange A24b thereby become.That is, among the flange A24b, heat-transfer area A24e directly is connected to the face of setting 101.In addition, become the state of the flange part A25a covering of being made among the flange A24b by the resin that constitutes housing A25 with the surface (upper surface) of heat-transfer area A24e opposition side, on the position corresponding with the through hole A24c of flange A24b in this flange part A25a, coaxial shape ground is formed with and the identical through hole A25b of this through hole A24c diameter.
Moreover housing A25 for having the shape of seal, is used to prevent that mist from leaking when stepper motor 1 is connected with the peristome of 100 the lateral surface from flow control chamber 102 to valve body.That is, housing A25 as Figure 25 and shown in Figure 26, forms in the outer peripheral face of upper surface, cylindrical portion A24a of the flange A24b that covers fully among the casing A24 and this cylindrical portion A24a axis direction peristome with flange A24b opposition side.
On the other hand, rotor A 3, as shown in figure 21, form cylindric, its axis direction both ends via ball bearing A51 be bearing in make on the housing A25 its rotation freely.Moreover, on the outer peripheral face of rotor A 3, near the magnetic pole piece A23c of each yoke A23 magnet A31 is set, and on inner peripheral surface, form internal thread A3a.
Output shaft A4 forms the external screw thread A4a that the internal thread A3a with rotor A 3 screws togather on outer peripheral face, follow the rotation of rotor A 3 and move along axis direction.Moreover an end side at the axis direction of output shaft A4 makes the valve A 41 that is formed by encapsulants such as resins integrally formed.In addition, output shaft A4 is fixed on by bolt A6 at stepper motor 1 under the state on the face that is provided with 101 of valve body 100, with valve port 104 coaxial shapes configurations, and by moving along axis direction, the aperture of regulating valve ports 104 by valve A 41.
Bolt A6, through hole A25b by inserting and connect the flange part A25a in housing A25 and the through hole A24c of the flange A24b among the casing A24, screw in and be anchored on the screwed hole that forms on the face that is provided with 101 of valve body 100, the heat-transfer area A24e of flange A24b is close on the face of setting 101 reliably, and stepper motor 1 is fixed on the valve body 100 reliably.
Moreover in Figure 21, A52 is a lid, is fixed on the housing A25 by screw element A53, with the peristome of output shaft A4 side among the covering stator A2, and is used for preventing the rotation of output shaft A4.
In the flow control valve that possesses the stepper motor 1 that constitutes as mentioned above,, determine the amount of movement of output shaft A4 axis direction, so can be by the aperture of valve A 41 fine adjustment valve ports 104 owing to the anglec of rotation according to rotor A 3.
Moreover in stepper motor 1, by using in open loop, even have electric current to flow through all the time in coiling A21, A21 always produces under the situation of Joule heat from coiling, and its heat also is passed to yoke A23 via reel A22, and then is passed to casing A24.Moreover the heat that produces in coiling A21 directly is passed to the casing A24 that surrounds periphery by radiant heat.In addition, be passed to the heat of casing A24, can be expelled to valve body 100 via the face that is provided with 101 that this flange A24b is close to from the flange A24b of this casing A24.
Therefore, though being covered by resinous housing A25 on every side of casing A24 also can improve the heat dispersion of the heat that produces in coiling A21.Therefore, owing to can reduce the temperature of coiling A21 self, thus can prevent the defective insulation that causes by insulation coverlay dissolving, and the thermal deformation of can prevent to wind the line A21, reel A22, yoke A23, housing A25 etc.And, because the temperature of coiling A21 descends, so needn't worry that producing heat on the magnet A31 near the rotor A 3 of this coiling A21 demagnetizes, and can prevent motor characteristics deteriorations such as moment of torsion.
In addition, in above-mentioned the 3rd execution mode, constitute the whole outer peripheral face that covers cylindrical portion A24a among the casing A24 with resinous housing A25, but also can constitute as shown in figure 27, with this housing A25 ester moulding and the part of the outer peripheral face of cylindrical portion A24a is exposed.
Under situation about constituting like this, because the part with cylindrical portion A24a among the casing A24 of good materials such as the iron formation of thermal conductivity becomes the state that is exposed in stepper motor 1 atmosphere on every side, so can effectively the heat that is passed to casing A24 be discharged to above-mentioned atmosphere side.Therefore, can prevent the variety of issue that rises and produce by the temperature of above-mentioned coiling A21 more reliably.
(the 4th execution mode)
Below, with reference to Figure 28～Figure 30 the 4th execution mode of the present invention is described.Wherein, the inscape identical with the 3rd execution mode used identical mark, simply its explanation.
The difference of the 4th execution mode and above-mentioned the 3rd execution mode is, casing 24A is not set but constitutes magnetic circuit by the 1st yoke A23 and the 2nd yoke A230 on each reel A22, and possess cooling mechanism A26.
The 1st yoke A23 is yoke A23 shown in Figure 23 in above-mentioned the 3rd execution mode, and locational back-to-back yoke A23 is identical with being configured in, so represent in Figure 28～Figure 30 with this mark " A23 ".
The 2nd yoke A230 is above-mentioned yoke A23 shown in Figure 23, and is corresponding with the yoke A23 that is configured in the axis direction both ends, uses identical mark for the position identical with this yoke A23, represents in Figure 28～Figure 30.
Promptly, the 1st yoke A23 is set, as shown in figure 28, make the inner peripheral surface of each magnetic pole piece A23c along the cylindrical portion A22a of reel A22, be provided with and the continuous hollow plectane A23a of portion of each magnetic pole piece A23c, so that its outer surface (end face of reel A22 axis direction) along the A22b of jaw portion of this reel A22.
On the other hand, the 2nd yoke A230 is formed by the parts that one has the urceolus A23e of portion cylindraceous, and the 23e of this urceolus portion forms and extends to the direction identical with each magnetic pole piece A23c with the coaxial shape of this hollow plectane A23a of portion from the outer peripheral edges A23d of the hollow plectane A23a of portion.
Following the 2nd yoke A230 that is provided with: make under the state of each magnetic pole piece A23c alternate configurations of each magnetic pole piece A23c and the 1st yoke A23 along the inner peripheral surface of the cylindrical portion A22a of reel A22, make the outer surface (another end face of reel A22 axis direction) along the A22b of another jaw portion of this reel A22 with the continuous hollow plectane A23a of portion of each magnetic pole piece A23c, and make and the A23e of urceolus portion that this hollow plectane A23a of portion is continuous extends along the outer circumferential side of axis direction at reel A22 towards an A22b of jaw portion from the A22b of another jaw portion, and make the inner peripheral surface of its leading section be close to the outer peripheral edges A23d of the 1st yoke A23.
In addition, by reel A22 with comprise the 1st stator that the yoke of the 1st yoke A23 that surrounds the setting of this reel A22 ground and the 2nd yoke A230 constitutes with coiling A21, with the 2nd stator of same formation, lamination under the state that each the 1st yoke A23 is close to back-to-back.In addition, under this state, preferably also make the leading section closely contact each other of the A23e of urceolus portion among each the 2nd yoke A230.
Cooling mechanism A26, integrally formed by the metal that thermal conductivitys such as iron are high, have cylindrical portion A26a and flange part A26b.
The following cylindrical portion A26a that is provided with: make the outer peripheral face of the A23e of urceolus portion among its outer peripheral face and the 2nd yoke A230 form roughly the same diameter, with the state of the coaxial shape of the 2nd yoke A230 configuration under, an end of axis direction and the hollow plectane A23a of portion of (below among the figure) the 2nd a yoke A230 are closely contacted.
Flange part A26b forms from another end of cylindrical portion A26a axis direction to the expansion of the outside of radial direction, and with the state of the face that is provided with 101 butts of valve body 100 under be connected with this valve body 100.But, because the flange part A24b of flange part A26b and the 3rd execution mode is same formation, so, in Figure 28～Figure 30, use the mark shown in the 3rd execution mode in the same old way about through hole A24c and heat-transfer area A24e.
Moreover, the housing A27 of ester moulding is set so that one links reel A22, the 1st yoke A23, the 2nd yoke A230 and the cooling mechanism A26 with coiling A21.In addition, constitute the stator A2 identical by reel A22, the 1st yoke A23, the 2nd yoke A230, cooling mechanism A26 and housing A27 with the stator A2 shown in the 3rd execution mode with coiling A21.
Wherein, because housing A27 is the formation identical with the flange A24b of the 3rd execution mode, so, in Figure 29 and Figure 30, use the mark shown in the 3rd execution mode in the same old way about flange part A25a and through hole A25b.
Moreover, because the formation of the rotor A shown in Figure 21 3, output shaft A4 etc. is identical with the 3rd execution mode except that stator A2, so omit explanation as the diagram and the formation of the 4th execution mode.
In the stepper motor 1 that constitutes as mentioned above, the heat that produces at each coiling A21 is passed to the 1st and the 2nd yoke A23, A230 via each reel A22, and directly is passed to the A23e of urceolus portion of the 2nd yoke A230 as radiant heat.In addition, be passed to the heat of each yoke A23, A230, be passed to the 2nd yoke A230 that is positioned at cooling mechanism A26 side via these each yoke A23, A230 of being close to mutually, and be expelled to valve body 100 from the flange part A26b of this cooling mechanism A26 via the cooling mechanism A26 that is close to the 2nd yoke A230.
Therefore, owing to can improve the heat dispersion of the heat that produces among the A21 in coiling, thus same with above-mentioned the 3rd execution mode, the problems such as deterioration in characteristics of the defective insulation that can prevent to cause, thermal deformation, motor by coiling A21 high temperature.
In addition, can play the action effect identical with the 3rd execution mode.
In addition, in the 4th execution mode, also constitute the whole outer peripheral face that covers each A23e of urceolus portion of upper-lower position with resinous housing A27, but also can similarly constitute, housing A27 is set the part of the outer peripheral face of each A23e of urceolus portion is exposed with shown in Figure 27.
(the 5th execution mode)
Below, Yi Bian with reference to Figure 31～Figure 35 B the 5th execution mode of the present invention is described on one side.
Stator B2 possesses: a plurality of yokes (magnetic pole plate) B21 is used to constitute magnetic circuit; A pair of resinous reel B22 keeps these yokes B21 integratedly, and connects along axis direction; Coiling B23 is wound on each reel B22 and connector B24, is configured in an end side of a reel B22 axis direction.Moreover, connector B24 is for possessing the formation of a plurality of (in this execution mode being 6) pin B25 and resinous connector shell B26, wherein, the coiling B23 that pin B25 is used for being wound on each reel B22 is connected not shown interior contact (external conductor), and connector shell B26 keeps these pins B25 integratedly.By for example solder connecting pin B25 and coiling B23.
Yoke B21, shown in Figure 35 A and Figure 35 B, integrally formed by magnetics such as iron, possess: the notch part B21e that coaxial shape is formed with the B21c of hollow plectane portion (plate-like portion) of circular inner peripheral B21a and outer peripheral edges B21b, forms to the part of a plurality of (this execution mode being 6) magnetic pole piece (utmost point tooth) B21d of axis direction bending forming and the 21b of outer peripheral edges portion among the linearity excision hollow plectane B21c of portion from the inner peripheral B21a of this hollow plectane B21c of portion.
That is, by magnetic pole piece B21d and the integrally formed yoke B21 of the hollow plectane B21c of portion, wherein, magnetic pole piece B21d is along the inner peripheral surface configuration of reel B22 described later, and the hollow plectane B21c of portion is along the axis direction end face configuration of reel B22.
And then, at yoke B21, remove on the outer peripheral edges B21b of notch part B21e, a plurality of (in this execution mode being 3) are set with respect to the B21f of concavity portion of these outer peripheral edges B21b to the recessed shape of inner peripheral B21a side.
Each B21f of concavity portion forms circular-arc concavity, and be arranged among the outer peripheral edges B21b, near an end and 2 positions of the other end and the substantial middle position between this two positions of notch part B21e.
The yoke B21 of Gou Chenging like this as Figure 31～shown in Figure 34, is provided with 2 corresponding to 1 reel B22.That is, yoke B21 shown in figure 32, by the configuration hollow plectane B21c of portion on each end face of axis direction of reel B22, along the inner peripheral surface alternate configurations magnetic pole piece B21d of reel B22, and is provided with 2 corresponding to 1 reel B22.Moreover, be configured in the hollow plectane B21c of portion on the adjacent end face of each reel B22, connect with mutual back-to-back state.
Moreover each yoke B21 is configured on the same axis, and the outer peripheral edges of each hollow plectane B21c of portion cover with the resin that the part of removing the inner peripheral surface of each magnetic pole piece B21d is configured a pair of reel B22, and remain fixing by this resin.
And then the central hollow plectane B21c of portion of back-to-back butt is arranged to each B21f of concavity portion and is in same position.
Each reel B22, shown in figure 32, by cylindrical portion B22a be the flange part B22b of discoideus hole enlargement from each end of axis direction of this cylindrical portion B22a integrally formed, inner peripheral surface along cylindrical portion B22a disposes above-mentioned magnetic pole piece B21d, and along the above-mentioned hollow plectane B21c of portion of cross-sectional configurations in the axis direction of each the flange part B22b outside.
Moreover each reel B22 by integrally formed with resin (for example PBT), becomes the state that connects along axis direction under the state of putting into above-mentioned each yoke B21.In addition, reel B22 and connector shell B26 described later are also integrally formed.
Moreover, each yoke B21, outstanding along the outer peripheral edges of each the flange part B22b of part from reel B22 of the outer peripheral edges B21b that removes notch part B21e among the hollow plectane B21c of portion to the outside of radial direction.And then, each B21f of concavity portion, be formed among the hollow plectane B21c of portion from each flange part B22b on the outstanding part in the outside of radial direction.
Connector shell B26, in axis direction one side of the reel B22 that connects, B22 is integrally formed with same resin with this reel.
Moreover connector shell B26 as shown in figure 33, on the end face of reel B22 side, is formed with one the dead eye B26a that keeps among the above-mentioned a pair of ball bearing B5.This dead eye B26a be formed on the coaxial position of the center line C of reel B22 on.
Casing B4 is integrally formed by magnetics such as iron, possesses surrounding wall portion cylindraceous (cylindrical portion) B41 and seals the tabular lid B42 of an end of this surrounding wall portion B41.Surrounding wall portion B41 forms inner circumferential surface and is embedded in the outer peripheral edges B21b of each yoke B21 and the outer peripheral face B26b of connector shell B26, and lid B42 is connected to reel B22 and the end face end opposition side that is formed with connector shell B26 that connects among the stator B2.
Moreover on the shaft core position of lid B42, the bearing teat B42a of another among the above-mentioned a pair of ball bearing B5 of formation maintenance forms the through hole B42c that makes with B31 insertion of the incorporate axle of rotor B3 and perforation on the end face B42b of this bearing teat B42a.
And then, on the surrounding wall portion B41 of casing B4, make this surrounding wall portion B41 be embedded in the outer peripheral edges B21b of yoke B21 and the outer peripheral face B26b of connector shell B26, and under the state of reel B22 and the end face end opposition side that is formed with connector shell B26 that lid B42 is connected to connect among the stator B2, be formed with the binding recess B41a that forms with the mode plastic deformation among each B21f of concavity portion of the outer peripheral edges B21b of the yoke B21 that submerges.
Moreover in Figure 34, B22d is the groove that the coiling B23 of the peripheral part of the flange part B22b that is arranged on reel B22 is passed.
Next, the manufacture method of the stepper motor 1 that constitutes as mentioned above is described.
At first, after in the not shown mould that reel B22 and connector shell B26 are shaped, inserting above-mentioned a plurality of yoke B21 and pin B25, resin is injected in this mould.Thus, pack into reel B22 and connector shell B26 of each yoke B21 and each pin B25 finishes.
In addition, as Figure 31 and shown in Figure 33, after the B23 that will wind the line is wound up on each reel B22, the end solder of each coiling B23 is sold on the end of B25 at each.
Moreover, a ball bearing B5 is entrenched among the dead eye B26a of connector shell B26, and the base end part of the axle B31 among the rotor B3 is inserted among this ball bearing B5.And then, the surrounding wall portion B41 that another ball bearing B5 is entrenched in the casing B4 that bearing teat B42a forms is entrenched on the outer peripheral face B26b of the outer peripheral edges B21b of yoke B21 and connector shell B26, and the leading section that makes a B31 is outstanding laterally from another ball bearing B5 and through hole B42c, on reel B22 and the end face end opposition side that is formed with connector shell B26 that lid B42 is connected to connect among the stator B2.
Next, as Figure 32 and shown in Figure 34, so that it submerges, form the binding recess B41a that is close to this each B21f of concavity portion by part riveting corresponding with each B21f of concavity portion of each hollow plectane B21c of portion among the surrounding wall portion B41 being gone among this each B21f of concavity portion.
Thus, casing B4 becomes via each yoke B21 and is securely fixed in state on the stator B2, and becomes with this stator B2, rotates the state of supporting rotor B3 freely via each ball bearing B5.
In addition, can use fixing meanss such as binding agent, welding, screw element and then connect box B4 and stator B2 securely.Moreover, as mentioned above, stator B2 is defined as possess yoke B21, the parts of reel B22, coiling B23 and connector B24, but also can be with the inscape of casing B4 as stator B2.
In the stepper motor 1 that constitutes as mentioned above, because the B21f of concavity portion is set on the outer peripheral edges B21b of the hollow plectane B21c of portion, and the binding recess B41a that forms in the mode among the B21f of concavity portion that submerges is set on surrounding wall portion B41, so can make the inner peripheral surface of surrounding wall portion B41 be close to the outer peripheral edges B21b of the hollow plectane B21c of portion reliably.
Promptly, surrounding wall portion B41 is embedded under the state of outer peripheral edges B21b of the hollow plectane B21c of portion, even vacating some gaps on chimeric between the inner peripheral surface of these outer peripheral edges B21b and surrounding wall portion B41, part by making surrounding wall portion B41 is submerged among the B21f of concavity portion of the hollow plectane B21c of portion as linking recess B41a, also can reduce the length of surrounding wall portion B41 circumferencial direction, can make the inner peripheral surface of this surrounding wall portion B41 be close to the outer peripheral edges B21b of the hollow plectane B21c of portion.At this moment, can make binding recess B41a also be close to the B21f of concavity portion.
And, owing to link the state that recess B41a becomes the B21f of concavity portion that is sticked in the hollow plectane B21c of portion, so can keep the state of being close between the outer peripheral edges B21b of the inner peripheral surface of surrounding wall portion B41 and the hollow plectane B21c of portion reliably, and can connect yoke B21 and casing B4 securely.
Therefore, can constitute the part of magnetic circuit by above-mentioned each yoke B21 and surrounding wall portion B41, this magnetic circuit is: the magnetic pole piece B21d of magnetic force from a yoke B21 corresponding with this coiling B23 that produces in a coiling B23 flow to the regulation magnetic pole of rotor B3, flow to the magnetic pole piece B21d of another yoke B21 from this magnetic pole, and can flow to a yoke B21 once more via surrounding wall portion B41 from this another yoke B21.And, can prevent as far as possible that the magnetic line of force of yoke B21 and casing B4 interface from leaking.Thus, the efficient that can realize stepper motor 1 improves.
Moreover, owing to can utilize and link recess B41a and make among the surrounding wall portion B41 part undergauge corresponding to the hollow plectane B21c of portion, so as linking recess B41a, even be less deflection, also can fully dwindle the diameter of surrounding wall portion B41 with respect to the diameter of the outer peripheral edges B21b of the hollow plectane B21c of portion, the inner peripheral surface of surrounding wall portion B41 is close on the outer peripheral edges B21b of the hollow plectane B21c of portion securely.
In addition, in existing stepper motor, as shown in figure 36, the structure that closely contacts for surrounding wall portion (cylindrical portion) d1 of the hollow plectane c2 of portion that makes each yoke c by recess d2 and casing d.Promptly, form recess d2 by a part of pushing the surrounding wall portion d1 between the hollow plectane c2 of portion to coiling a side, utilize this recess d2 to make the inner peripheral surface of surrounding wall portion d1 be close to the outer peripheral edges of the hollow plectane c2 of portion, the magnetic line of force that can suppress the interface of surrounding wall portion d1 and each hollow plectane c2 of portion thus leaks.Moreover in Figure 36, b is a reel, and c1 is a magnetic pole piece, and e is a rotor.
Yet, even under the situation that forms recess d2, sometimes also because its after forming resilience and make the part of surrounding wall portion d1 leave the outer peripheral edges of the hollow plectane c2 of portion, thereby can not make the inner peripheral surface of surrounding wall portion d1 fully be close to the outer peripheral edges of the hollow plectane c2 of portion.In order to prevent such problem, needing increases recess d2 amount of plastic deformation to the inside, but in this case, because surrounding wall portion d1 is near coiling a, so the dielectric voltage withstand impedance between coiling a and the casing d reduces.
In addition, in this case,, need to reduce the winding number of coiling a for the fully dielectric voltage withstand impedance between acquisition coiling a and the casing d, or the diameter of the inner peripheral surface of the outer peripheral edges of the increase hollow plectane c2 of portion and surrounding wall portion d1.But this following new problem will occur: under the situation of the winding number that reduces coiling a, the moment of torsion that rotor e produces reduces, and under the situation of the diameter of the inner peripheral surface of outer peripheral edges that increase the hollow plectane c2 of portion and surrounding wall portion d1, can cause stepper motor to maximize.
Be directed to this, in the present embodiment, suppress lessly, the inner peripheral surface of surrounding wall portion B41 is close on the outer peripheral edges B21b of the hollow plectane B21c of portion reliably even will link the deflection of recess B41a.
Therefore, even after forming binding recess B41a, also the dielectric voltage withstand impedance between coiling B23 and the casing B4 can be maintained sufficiently high state.Can prevent following drawback thus: reduce owing to the winding number that reduces coiling B23 makes the moment of torsion of stepper motor, or make the stepper motor maximization owing to increase the diameter of the inner peripheral surface of the outer peripheral edges B21b of the hollow plectane B21c of portion and surrounding wall portion B41.
And then, because in the outer peripheral edges B21b of the hollow plectane B21c of portion, the B21f of concavity portion is set near the end of notch part B21e and 2 positions of the other end and this 3 place, substantial middle position between this two positions, so by with notch part B21e near each B21f of concavity portion corresponding form binding recess B41a after, corresponding with the B21f of concavity portion of substantial middle position and form and link recess B41a, can suppress undergauge on one side, Yi Bian make surrounding wall portion B41 undergauge corresponding to the part of outer peripheral edges B21b corresponding to the surrounding wall portion B41 of the part of notch part B21e.
Therefore, even under situation, surrounding wall portion B41 is close on the outer peripheral edges B21b of the hollow plectane B21c of portion reliably with notch part B21e.
In addition, though in above-mentioned the 5th execution mode, for the formation of 3 B21f of concavity portion is set on yoke B21, the B21f of this concavity portion can be 1, also can be for more than 2 a plurality of.
Wherein, as mentioned above, under notch part B21e is situation more than 1, be preferably near the notch part B21e among the outer peripheral edges B21b everybody and install the B21f of concavity portion, the B21f of concavity portion more than 1 is set between the B21f of these concavity portions, and on surrounding wall portion B41, forms the binding recess B41a of each B21f of concavity portion that submerges.
(the 6th execution mode)
Below, Yi Bian with reference to Figure 37 A～Figure 38 C the 6th execution mode of the present invention is described on one side.
Figure 37 A and Figure 37 B are the figure of an execution mode of expression stepper motor of the present invention, and Figure 37 A is its positive view, and Figure 37 B is the cutaway view of the B～B line along Figure 37 A.Figure 38 A～Figure 38 C is the details drawing that the abrasion of the stepper motor shown in Figure 37 A and Figure 37 B reduce the axis direction latch for printed circuit, and Figure 38 A is its vertical view, and Figure 38 B is its front view, and Figure 38 C is the cutaway view of the C～C line along Figure 38 A.
Promptly, this stepper motor 1, shown in Figure 37 A and Figure 37 B, having stator C2 roughly cylindraceous (is equivalent to above-mentioned mark 2, B2, the stator that A2 represents), be inserted with the rotor cylindraceous (not expression in Figure 37 A～Figure 38 C still is equivalent to the rotor of representing with above-mentioned mark 3, A3, B3) that can rotate freely on the stator C2 by electromagnetic force.And then, screwed togather a C3 at this its axis direction of rotor upper edge (arrow M, N direction) free to advance or retreatly.At this, on the inner peripheral surface of above-mentioned rotor, form internal thread part, and on the outer peripheral face of axle C3, form external thread part, the external thread part of axle C3 is screwed together in the internal thread part of rotor.Moreover, front end at axle C3 is equipped with the valve body C5 of plastic valve as the Be Controlled body by the ester moulding one, on valve body C5, shown in Figure 37 B, form restrained C5a of rotation of two D shearing section shapes (be a kind of of non-circular cross sectional shape, 2 places on the circumference be cut into the cross sectional shape of D font).On the other hand, the form with restrained C5a of the rotation that is embedded in valve body C5 forms the rotation condition C2a of portion on stator C2.And then, on valve body C5, shown in Figure 37 A, the edge C5b of portion cylindraceous forms and covers abrasion reduction axis direction latch for printed circuit C9, valve seat (represent in Figure 37 A and Figure 37 B, still be equivalent to the valve seat of above-mentioned mark 106 (Figure 21)) is set opposed to each other in the place ahead of valve body C5.Therefore, if above-mentioned rotor both forward and reverse directions rotation, then axle C3 advances or retreats along the axis direction of axle C3 with the restrained state of its rotation, follow in this, thereby valve body C5 near or make the flow of valve increase or reduce away from above-mentioned valve seat.
But, on the C2a of rotation condition portion of stator C2, shown in Figure 37 A and Figure 37 B, be equipped with and form the metal abrasion reduction of the tubular that has flange axis direction latch for printed circuit C9, abrasion reduce axis direction latch for printed circuit C9, shown in Figure 38 A～Figure 38 C, comprise that a couple cylindrical portion C9a of D shearing sections shape and an end are arranged on the flange part C9b on this cylindrical portion C9a continuously.
Because stepper motor 1 has above formation, so if axle C3 advances and retreat along its axis direction (arrow M, N direction), then restrained C5a of the rotation of valve body C5 moves along the axis direction of axle C3 with respect to the C2a of rotation condition portion of stator C2, but, abrasion reduce axis direction latch for printed circuit C9 on the C2a of rotation condition portion of stator C2 because being installed, restrained C5a of the rotation of valve body C5 slides with respect to this cylindrical portion C9a, so abrasion between the two reduce.Moreover, if axle C3 retreats along its axis direction (arrow N direction), then valve body C5 is to stator C2 side shifting, but because being installed, abrasion reduce axis direction latch for printed circuit C9 on the C2a of rotation condition portion of stator C2, so thereby valve body C5 is connected to this flange part C9b upward makes the backward movement of a C3 stop at assigned position.
Thus, in this stepper motor 1, abrasion reduction axis direction latch for printed circuit C9 performance reduces the axis direction advance and retreat of following a C3 and the abrasion reduction function of the abrasion that produce, and the axis direction card that performance makes the backward movement of a C3 stop at assigned position ends function.
In addition, in existing stepper motor, shown in Figure 39 A and Figure 39 B, on valve body C5, the metallic abrasion that form tubular reduce the periphery that parts C6 is inlaid in restrained the C5a of rotation of valve body C5.Moreover, when retreating, stop at assigned position to rotor-side (arrow N direction) at axle C3 in order to make its backward movement, be installed in structure on the valve body C5 for forming metallic axis direction latch for printed circuit C7 one cylindraceous.
Yet in above-mentioned existing stepper motor, owing to need abrasion to reduce parts C6 and two parts of axis direction latch for printed circuit C7, the material cost of its appropriate section has to rise.And, because reducing parts C6, abrasion are installed in valve body C5 side, so abrasion reduce all necessary setting-in of parts C6 thereon in the whole stroke of axle C3, particularly under the long situation of the stroke (displacement of valve body C5) of axle C3, correspondingly need long abrasion to reduce parts C6, from this aspect the material cost of stepper motor also risen.
And, when making this stepper motor, in the forming process of valve body C5, the operator is by making its shaping under the state in axle C3, abrasion being reduced parts C6 and axis direction latch for printed circuit C7 insertion shaping dies, must make these 3 parts integrally formed, so the time lengthening that valve body C5 is shaped and needs, the manufacturing cost of stepper motor significantly rises.In addition, though consider to make the forming process automation of valve body C5, need to spend shortage actuality on this aspect of high cost in the early stage by robot manipulating task.
Be directed to this, in this embodiment since will axis direction latch for printed circuit C7 as another parts, can reduce components number, so can reduce material cost etc.
And, because reducing axis direction latch for printed circuit C9, abrasion are installed in stator C2 side rather than valve body C5 side, so even for example the stroke (displacement of valve body C5) of axle C3 is longer, do not need cylindrical portion C9a yet, see the material cost that yet can reduce stepper motor 1 from this point according to its length lengthening abrasion reduction axis direction latch for printed circuit C9.
Moreover, as mentioned above,, abrasion are installed in stator C2 side rather than valve body C5 side because reducing axis direction latch for printed circuit C9, so when making this stepper motor 1, only that axle C3 is integrally formed just enough on valve body C5 in the forming process of valve body C5.Its result is, the existing stepper motor (with reference to Figure 39 A and Figure 39 B) also integrally formed with axis direction latch for printed circuit C7 with also must make abrasion reduction parts C6 except axle C3 compared, because the time that valve body C5 is shaped to be needed shortens, so can reduce the manufacturing cost of stepper motor 1.
And then, reduce axis direction latch for printed circuit C9 owing to form the C5b of edge portion (skirt) on valve body C5 to cover abrasion, so can suppress the generation of the following state of affairs: the fluid that flows through valve enters in the stator C2 by the gap that abrasion reduce between axis direction latch for printed circuit C9 and the valve body C5.
In addition, though in the above-described embodiment, be illustrated as the situation of Be Controlled body, also can apply the present invention to possess the stepper motor 1 of valve body C5 Be Controlled body in addition about using valve body C5.For example, can be with the active head lamp of automobile (in order to prevent the motor-vehicle accident at night in advance, at the parting of the ways or corner etc. based on the inclination angle or the speed of a motor vehicle of steering wheel, can with about or pull reflective mirror up and down and make optical axis towards head lamp that the mode of direction of advance is controlled) in the link of reflective mirror use as the Be Controlled body.
Moreover, in the above-described embodiment, about adopting two D shearing sections shape to be illustrated as the situation of the cross sectional shape of restrained C5a of the rotation of valve body C5, but the cross sectional shape of restrained C5a of the rotation of valve body C5 is so long as non-circular cross sectional shape, the rotation of valve body C5 is just restrained, and all it doesn't matter so adopt any cross sectional shape.For example, also can adopt at the cross sectional shape of the cross sectional shape that sets the overshooting shape cross section more than the place on the circumference of circular cross-section as restrained C5a of the rotation of valve body C5.
Industrial applicibility
According to the present invention, since by resin that reel and connector shell is integrally formed, institute With with possess separately respectively reel and connector shell, and when assembling is by ultrasonic fusing etc. The existing product that connects reel and connector shell is compared, and can realize components number and group Fill the minimizing in man-hour.
Claims (1)
1. stepper motor possesses: reel is kept for constituting the yoke of magnetic circuit integratedly and has the coiling portion of the coiling that is used for reeling on periphery; And connector shell, be configured on the end of axis direction of this reel, be kept for integratedly being connected pin on the external conductor with being wound on coiling on the above-mentioned reel,
Above-mentioned reel has flange part, and it is outstanding with the winding position in the above-mentioned coiling of the restriction portion on above-mentioned axis direction to the radial direction outside,
Above-mentioned connector shell has terminal face is set; Its with an end of above-mentioned axis direction that is configured in above-mentioned reel on above-mentioned flange part adjacency; And the outer peripheral edges with respect to this flange part are formed on the inner side of radial direction; Above-mentioned pin formation as described below: one end thereof becomes from above-mentioned terminal the portion of terminal that face is outstanding, connect the end of above-mentioned coiling is set; And the whole above-mentioned portion of terminal that comprises the connecting portion of above-mentioned coiling is positioned on the position of radial direction inboard with respect to the outer peripheral edges of above-mentioned flange part
Above-mentioned terminal be provided with face and and this terminal be provided with between the above-mentioned flange part of face adjacency, be provided with auxiliary reel portion, it is provided with face with respect to above-mentioned terminal and is formed on the radial direction inner side, the coiling that is connected on the above-mentioned portion of terminal is wound thereon, be winding to after the initial end of coiling that is connected the above-mentioned coiling on the above-mentioned portion of terminal is wound in the above-mentioned auxiliary reel portion in the above-mentioned coiling portion, and the coiling terminal part that is wound up into the above-mentioned coiling in the above-mentioned coiling portion is connected to above-mentioned portion of terminal after being wound up in the above-mentioned auxiliary reel portion.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP184611/2003 | 2003-06-27 | ||
| JP2003184611A JP4186728B2 (en) | 2003-06-27 | 2003-06-27 | Stepping motor |
| JP297749/2003 | 2003-08-21 | ||
| JP347174/2003 | 2003-10-06 | ||
| JP353748/2003 | 2003-10-14 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1813393A CN1813393A (en) | 2006-08-02 |
| CN100499324C true CN100499324C (en) | 2009-06-10 |
Family
ID=34184319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004800182004A Active CN100499324C (en) | 2003-06-27 | 2004-06-18 | Stepping motor and method of manufacturing the same |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4186728B2 (en) |
| CN (1) | CN100499324C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4923646B2 (en) * | 2006-03-17 | 2012-04-25 | 三菱マテリアルシーエムアイ株式会社 | motor |
| JP2013158219A (en) | 2012-01-31 | 2013-08-15 | Nippon Densan Corp | Motor unit |
| JP6054754B2 (en) * | 2013-01-15 | 2016-12-27 | ミネベア株式会社 | Stepping motor |
| JP2015130760A (en) * | 2014-01-08 | 2015-07-16 | 日本電産サンキョー株式会社 | Coil bobbin and motor |
| CN205081661U (en) * | 2015-09-22 | 2016-03-09 | 大陆汽车电子(芜湖)有限公司 | Stator assembly and contain step drive motor of this stator assembly |
-
2003
- 2003-06-27 JP JP2003184611A patent/JP4186728B2/en not_active Expired - Lifetime
-
2004
- 2004-06-18 CN CNB2004800182004A patent/CN100499324C/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP4186728B2 (en) | 2008-11-26 |
| JP2005020938A (en) | 2005-01-20 |
| CN1813393A (en) | 2006-08-02 |
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