CN206575260U - Stepper motor - Google Patents
Stepper motor Download PDFInfo
- Publication number
- CN206575260U CN206575260U CN201720271117.2U CN201720271117U CN206575260U CN 206575260 U CN206575260 U CN 206575260U CN 201720271117 U CN201720271117 U CN 201720271117U CN 206575260 U CN206575260 U CN 206575260U
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- Prior art keywords
- stator
- armature spindle
- stepper motor
- magnetic guiding
- contact pin
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- 238000005299 abrasion Methods 0.000 description 1
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- 238000004870 electrical engineering Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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Abstract
The stepper motor that the utility model is provided, including magnetic guiding loop；Stator, is sheathed in magnetic guiding loop；Stator includes stator body, pole piece and coil；It is configured at the stator bonnet of stator body rear end；Stator bonnet and stator body integrated injection molding, and stator body is integrally formed by overmolded mode and pole piece；It is provided with rear side of stator bonnet in opening neck, opening neck and is connected with contact pin, the first end of contact pin is connected with overhang, the second end of contact pin is used for socket power.The stepper motor that the utility model is provided, by the way that contact pin is removably connected in the opening neck of stator bonnet, can avoid contact pin from being assembled into when being covered after stator and the problems such as contact pin deformation, contact pin are shifted occur.
Description
Technical field
The utility model is related to electrical engineering field, and in particular to a kind of stepper motor.
Background technology
Stepper motor mainly includes two classes：One class is the rotating stepper motor for output torque, and another kind of is for defeated
Go out the linear stepping motor of linear motion.Linear stepping motor is alternatively referred to as linear stepping motor, is to be directly changed into electric energy
A kind of thrust device of linear mechanical motion.Linear stepping motor has a wide range of applications in automotive field, for example, for controlling
The direction of illumination of car light or the steering for controlling wheel.With advances in technology, linear stepping motor have toward miniaturization,
The trend of lightness development.
The typical structure of the stepper motor of prior art is as described below：Stator is set with the magnetic guiding loop being made of metal,
Stator includes stator body, pole piece and coil.Pole piece is embedded in stator body, and coil is wrapped on stator body, stator master
Body and magnetic guiding loop un-rotatably coordinate.The rear end of stator body is provided with stator bonnet, and stator bonnet is used for fixing plug pin.Insert
One end of pin and overhang connection, the other end are used for and power supply connection.Rotor magnet is set with stator, when contact pin even electricity
When, coil produces rotating excitation field, and rotor magnet rotates in the presence of rotating excitation field.The centre of rotor magnet is provided with and rotor
The armature spindle that magnet is rotated coaxially.Rotating stepper motor can directly pass through armature spindle output torque.Linear stepping motor is also needed
In the centrally disposed screwed hole of armature spindle, the two ends of armature spindle is supported respectively by bearing, make to circumferentially rotate confined regulation
Head is located in the screwed hole of armature spindle and sets external screw thread on regulation head, and external screw thread engages cooperation with screwed hole, makes rotor
The linear motion for being converted into adjusting head of magnet, is outwards exerted a force by the front end for adjusting head.
The stepper motor (including linear stepping motor and rotating stepper motor) of prior art, stator body and stator bonnet
Using identical plastics in same injection mold integrated injection molding, and be combined into one with pole piece and contact pin in forming process
Body.Specifically, before the injection mold cavity injected plastic toward stator body and stator bonnet, after stator body and stator
A lot of pole piece and multiple contact pins are pre-positioned in the injection mold of lid, then plastics are injected into dies cavity, makes stator body, determine
Sub- bonnet, pole piece and contact pin are combined into one in injection mold.
When plastics are molded in injection mold, the pressure ratio in mould is larger, and plastics can be with liquid in injection moulding process
Form flowing.Contact size applied to small linear stepper motor is smaller, the small contact pin of size in injection mold with
During injection-moulded plastic is combined into one, impacted, easily deformed or even mobile by mould inner pressure and fluid, shadow
Ring the shaping qualification rate of product.In addition, the cooling procedure after the product of injection molding is taken out out of mould can shrink deformation,
Make contact pin by larger deformation force, can also influence the performance of contact pin.
In addition, the linear stepping motor of prior art, because rotor magnet, armature spindle and regulation head are disposed coaxially on magnetic guiding loop
Center, cause being relatively large in diameter for magnetic guiding loop, be unfavorable for the Miniaturization Design of motor.Reduce magnetic conduction ring diameter when needing to meet
During demand, then need by adjust head diameter do it is as far as possible small.When regulation head diameter significantly reduces, in order to meet regulation head
Thrust requirements, the then material requirements for exchanging section header and the processing technology for adjusting head require all higher, and this can cause to adjust head
Cost be substantially improved, the cost for also resulting in linear stepping motor is substantially improved.
In addition, adjusting head in the prior art for metal shaft, it can be produced than larger vibration and axial movement in the course of work.
To improve such case, it will usually which in one end of regulation head against a spring, and spring is applied to the pretightning force of armature spindle, meeting again
Aggravate the fretting wear of armature spindle.
Utility model content
The utility model aims to provide a kind of stepper motor, to solve the above-mentioned technology that the stepper motor of prior art is present
At least one in problem.
The stepper motor that the utility model is provided, including：Magnetic guiding loop；Stator, is sheathed in magnetic guiding loop；Stator includes stator
Main body, pole piece and coil；It is configured at the stator bonnet of stator body rear end；Characterized in that, stator bonnet and stator body
Integrated injection molding, and stator body is integrally formed by overmolded mode and pole piece；It is provided with rear side of stator bonnet
Be open neck, is connected with contact pin in opening neck, the first end of contact pin is connected with overhang, and the second end of contact pin is used to insert
Connect power supply.
Further, the stepper motor also includes：Coordinate to block the protection cap of magnetic guiding loop rear end with stator bonnet；Protection
Lid includes：End cap portions, lid is located in the opening of opening neck；Arc joint portion, is configured at least part edge of end cap portions simultaneously
Extend forward, engaged with the rear end with magnetic guiding loop.
Further, the stepper motor also includes：Connector body, including annular sleeve and with annular sleeve integrated injection molding
Connection end；Connector body is configured to the injected plastics material covering for making at least part outer face of end cap portions not be connected device main body
Configuration；Annular sleeve is coated to the outer of the magnetic guiding loop fitted together, stator bonnet and protection cap in injection molding process
On side face；The front end of magnetic guiding loop protrudes from the front end of annular sleeve；Connection end is from annular sleeve to the direction away from annular sleeve center
Extension, connection end has the inner space at the second end for accommodating contact pin.
Further, end cap portions are located in annular sleeve, and the rear end of annular sleeve is provided with the opening towards end cap portions.
Further, the stepper motor also includes：Rotor magnet, is set in stator body；Front shaft sleeve, relative to magnetic conduction
The center line of ring is un-rotatably configured at the front end of magnetic guiding loop；Armature spindle, is configured on the center line of rotor magnet and with turning
Sub- magnet un-rotatably coordinates；The front end of armature spindle is extend into the centre bore of front shaft sleeve；Head is adjusted, is axially slidably covered
It is located in the centre bore of front shaft sleeve；Wherein, the front end of regulation head is stretched out from the front end of front shaft sleeve, adjusts rear end and the armature spindle of head
Coordinated by helicitic texture.
Further, magnetic guiding loop has the first cylindrical part and the first end wall positioned at the first cylindrical part front end, and stator is arranged
In the first cylindrical part；Front shaft sleeve has the second cylindrical part and the second end wall positioned at the second cylindrical part rear end；Second cylindrical part
In the centre bore for being located in the first end wall, regulation head and the centre bore of the second cylindrical part are slidably matched；Second end wall has clamping
Part between the first end wall and stator body；Between the second end wall and the first end wall and/or the second end wall and stator master
The projection and recess being engaged are provided between body, to limit the rotation of front shaft sleeve.
Further, projection is arranged on the outer peripheral edge of the second end wall and extended radially outward.
Further, the center-hole diameter of the second end wall is less than the center-hole diameter of the second cylindrical part, the middle part of armature spindle
Supported by the centre bore of the second end wall；The shrinkage pool for supporting rotor shaft rear end is configured with front side of stator bonnet.
Further, the stepper motor also includes being provided with the clamp of U-lag, and clamp is located in magnetic guiding loop and is clamped in the
Between two end walls and stator body；Annular groove is provided with armature spindle, U-lag is fastened in annular groove to limit the axle of armature spindle
To movement.
Further, it is provided with one of both periphery walls of the hole wall of the centre bore of the second cylindrical part and regulation head
The guiding rib being slidably matched with guide groove is provided with the guide groove axially extended, another one.
Further, be provided with armature spindle with the second end wall against the shaft shoulder, be provided with and rotor shaft rear end in shrinkage pool
Against steel ball.
Further, the material of rotor magnet is injection molded magnets, and armature spindle is metal shaft；Or, the material of rotor magnet
For injection molded magnets, the material of armature spindle is the resin with self lubricity；Rotor magnet and armature spindle pass through interference fit, Nian Jie
Or overmolded mode is integrally formed.
Further, the rear end face of regulation head is provided with the screwed hole axially extended, and armature spindle is located at front shaft sleeve
Part in centre bore is provided with external thread section, and external thread section engages cooperation with screwed hole, and the rotation of armature spindle is converted into
Adjust the linear motion of head.
The stepper motor that the utility model is provided, the rear side of the stator bonnet formed in injection sets opening neck, contact pin
With being covered after being installed to stator by way of opening neck removably clamping, being not only easy to contact pin outside injection mold
Be assembled into after stator and cover, can also avoid in the prior art contact pin be integrally formed in injection mold with stator bonnet easily
Contact pin deformation, contact pin displacement of generation etc. cause the underproof problem of product.In addition, because in injection mold without the concern for contact pin
Orientation problem, the manufacture difficulty and manufacturing cost of injection mold can also be greatly reduced.
Brief description of the drawings
Embodiment of the present utility model is further described hereinafter with reference to accompanying drawing, in the accompanying drawings：
Fig. 1 shows the sectional structure for the stepper motor that the utility model first embodiment is provided；
Fig. 2 shows the stereochemical structure of the clamp for the stepper motor that the utility model first embodiment is provided,
Fig. 3 shows the decomposition texture for the stepper motor that the utility model first embodiment is provided；
Fig. 4 shows the stereochemical structure for the stepper motor that the utility model first embodiment is provided；
Fig. 5 shows the stereochemical structure of the connector body of the stepper motor of the utility model first embodiment；
Fig. 6 shows in the stepper motor of the utility model first embodiment that contact pin is connected to the structure in open card groove；
Fig. 7 shown in the stepper motor of the utility model first embodiment, contact pin and the structure of opening exact separation；With
And,
Fig. 8 shows the sectional structure for the stepper motor that the utility model second embodiment is provided.
Embodiment
Referring to Fig. 1, the sectional structure for the stepper motor that the utility model first embodiment is provided is shown.As illustrated,
The stepper motor includes：Magnetic guiding loop 1, stator 2, rotor magnet 3, armature spindle 31, front shaft sleeve 4, regulation first 5 etc..Need explanation
It is that unless otherwise explained, involved Directional words "front", "rear" is signified with arrow A in Fig. 1 in the utility model embodiment
Direction be before, direction signified the arrow B using in Fig. 1 is used as reference direction after.
In a kind of stepper motor of miniaturization, understand that magnetic guiding loop 1 is preferably by magnetic metal (example with reference to known technology
Such as iron) it is made.Stator 2 is sheathed in magnetic guiding loop 1 and un-rotatably coordinated with magnetic guiding loop 1.Stator 2 include stator body 21,
It is embedded the pole piece 22 in stator body 21, and the coil 23 being wrapped on stator body 21.Stator body 21 preferably by
Injection molding.Pole piece 22 is arranged in pairs, and the outer peripheral edge of each pole piece 22 is adjacent to the internal perisporium of magnetic guiding loop 1, and each pole piece 22
It is circumferentially distributed to have multiple pole teeth.A coil 23 is wound with stator body 21 between each pair pole piece 22, in stator body 21
Rear end be also configured with stator bonnet 7, stator bonnet 7 is used for the rear end for blocking stator body 21, can also partly block and lead
The rear end of magnet ring 1.Stator bonnet 7 is additionally operable to install multiple contact pins 72.The first end (upper end in Fig. 1) of each contact pin 72 be used for and
Overhang is connected, and the second end 722 (lower end in Fig. 1) is used for socket power.
By in Fig. 1 and Fig. 3 it can also be seen that the present embodiment in, stator bonnet 7 it is consistent with the material of stator body 21 simultaneously one
Body injection molding.In addition before injection molding stator body 21 and stator bonnet 7, the correspondence stator body 21 in injection mold
Chamber in, be pre-placed each pole piece 22 so that stator body 21 is integrally formed by overmolded mode with pole piece 22.
That is, by being once molded, making stator body 21 and stator bonnet 7 be molded and be combined into one with pole piece 22.With reference to referring to Fig. 6
And Fig. 7, the rear side of stator bonnet 7 is provided with opening neck 71.Contact pin 72 is removably connected in opening neck 71, contact pin 72
It is preferably to be interference fitted between opening neck 71.It is appreciated that to fix the position of contact pin 72, contact pin 42 can be with
Coordinate clamping with multiple opening necks 71.
In the stepper motor that the present embodiment is provided, stator bonnet 7 and the integrated injection molding of stator body 21 are formed in injection
The rear side of stator bonnet 7 opening neck 71 is set, contact pin 72 passes through the side with the clamping of opening neck 71 outside injection mold
Formula is installed on stator bonnet 7, rather than is combined into one in injection mold with stator bonnet 7.So, it can not only avoid
The incidental contact pin deformation of institute, contact pin are moved when contact pin 72 is integrally formed in injection mold with stator bonnet 7 in the prior art
Position etc. causes the underproof problem of product, and the manufacture difficulty and manufacturing cost of injection mold can also be greatly reduced.In addition, inserting
Pin 72 can use automation equipment to be caught in automatically in open card groove 71, not only be easy to contact pin 72 being assembled on stator bonnet 7,
Also ensure the assembling quality of contact pin 72.In addition, contact pin 72 and the clamping of opening neck 71, are not only easy to enter the position of contact pin 72
Row adjustment, is also convenient for exchanging the contact pin 72 of damage.
With reference to Fig. 1 and Fig. 3 is referred to, to avoid the junction of the first end of contact pin 72 and end turn exposed, and avoid inserting
Pin 72 comes off from opening neck 71, and the stepper motor also includes protection cap 8, and protection cap 8 coordinates to block magnetic conduction with stator bonnet 7
The rear end of ring 1.Protection cap 8 has the end cap portions 81 that lid is located in the opening of opening neck 71, and the end cap portions 81 are preferably with leading
The center line of magnet ring 1 is perpendicular.End cap portions 81 can close the opening of opening neck 71, prevent contact pin 72 from opening neck 71
Opening comes off.End cap portions 81 are preferably rounded, form the rear end cap of stepper motor.It is provided with the part edge of end cap portions 81
The arc joint portion 82 extended forward, arc joint portion 82 be used for and magnetic guiding loop 1 rear end preferably in an interference fit
With reference to so that the space relative closure where the first end of contact pin 72.Another part edge of end cap portions 81 is also provided with
The flange 83 extended forward, flange 83 is used to engage with stator bonnet 7.
With reference to reference to Fig. 1, Fig. 3, to Fig. 5, the stepper motor also includes connector body 9, and connector body 9 is including annular
Set 91 and the connection end 92 with the integrated injection molding of annular sleeve 91.Connector body 9 is configured to make at least part of end cap portions 81
Outer face 811 is not connected the configuration of the injected plastics material covering of device main body 9.
Specifically, annular sleeve 91 is coated to the magnetic guiding loop 1 fitted together, stator bonnet 7 in injection molding process
On the outer peripheral face of protection cap 8, connector body 9, magnetic guiding loop 1, stator bonnet 7 and protection cap 8 is set to be fixedly combined integrally.
As can be seen from Figure, the front end of magnetic guiding loop 1 protrudes from the front end of annular sleeve 91, makes the endless all standing magnetic guiding loop 1 of annular sleeve 91
Outer peripheral face, be conducive to the radiating of motor.What is more important, the backend arrangement of annular sleeve 91 is into making at least portion of end cap portions 81
Exceptionally end face 811 (such as central area of outer face 811) is not injection molding the configuration of material covering, makes end cap portions 81 in stepping electricity
The outside of machine can be observed.In the present embodiment, end cap portions 81 are located in annular sleeve 91, and the rear end of annular sleeve 91 is provided with court
To the opening 910 of end cap portions 81, make end cap portions 81 visible through opening 910.Preferably, opening 910 can be circular hole, circular hole
Diameter can be equal to the outer circumference diameter of round nose cap 81 or be slightly less than the outer circumference diameter of round nose cap 81.It is appreciated that
In other embodiments, end cap portions 81 can be outstanding from the rear end of annular sleeve 91, and end cap portions 81 can also be made visible.
In the forming process of connector body 9 of the prior art, the injection-moulded plastic for constituting connector body 9 is completely covered
The outer surface (the whole outer faces for including the end cap portions 81 of protection cap 8) of protection cap 8 so that the end cap portions 81 of protection cap 8 are even
The interior meeting of mould of device main body 9 is connect by larger axial compressive force and axial compressive force can be passed to stator bonnet 7, can be led to again
Cross stator bonnet 7 and pass to rotor part and miscellaneous part, so easily cause motor internal part deformation, and cause rotor
The problems such as 31 clamping stagnation of axle.The present embodiment makes the end cap of protection cap 8 by the way that connector body 9 is configured to it can be seen from Fig. 1
Portion 81, which is not formed in the configuration of the injected plastics material covering of connector body 9, the forming process that can avoid connector body 9, to be made
The problems such as end cap portions 81 bear motor internal part deformation, armature spindle clamping stagnation caused by larger axial compressive force.In addition, by making
The outer face 811 of end cap portions 81 is exposed, during injection molding connector body 9, and the outer face 811 of end cap portions 81 can be in mould
Used as locating surface, the shaping to connector body 9 is especially advantageous.
Connection end 92 extends from annular sleeve 91 to the direction away from the center of annular sleeve 91.Connection end 92, which has, accommodates contact pin
The inner space at 72 the second end 722, to protect the second end 722 of contact pin 72, it is to avoid it deforms.
With return reference to Fig. 1, in the present embodiment, rotor magnet 3 is set in stator body 21 and drives rotation by stator 2.
Armature spindle 31 is configured on the center line of rotor magnet 3 and un-rotatably coordinated with rotor magnet 3.Preferably, rotor magnet 3
Material be injection molded magnets by injection molding, armature spindle 31 is metal shaft, and rotor magnet 3 and armature spindle 31 can pass through interference
Coordinate, bonding or overmolded mode are integrally formed.Or in other embodiments, the material of rotor magnet 3 is injection
Magnet, the material of armature spindle 31 is the resin (such as using the polyphenylene sulfide for being mixed with kollag) with self lubricity,
Both rotor magnet 3 and armature spindle 31 can respectively after injection molding again be interference fitted or bonding by way of be integrally formed,
Or after one of which injection molding, another one makes the two be combined into one in overmolded mode.
There is front shaft sleeve 4 in the front-end configuration of magnetic guiding loop 1, front shaft sleeve 4 is un-rotatably matched somebody with somebody relative to the center line of magnetic guiding loop 1
It is placed in the front end of magnetic guiding loop 1.The front end of armature spindle 31 is extend into the centre bore of front shaft sleeve 4.Set in the centre bore of front shaft sleeve 4
There is regulation first 5, circumferentially rotating for regulation first 5 is limited, and regulation first 5 is axially slidably set in the centre bore of front shaft sleeve 4
In.That is, the stepper motor of the present embodiment is more specifically linear stepping motor.As can be seen from Figure, the front end of regulation first 5
Stretched out from the front end of front shaft sleeve 4, the rear end of regulation first 5 is located in the centre bore of front shaft sleeve 4, the rear end of regulation first 5 and armature spindle
31 are coordinated by helicitic texture.Preferably, in the present embodiment, the spiral shell axially extended is provided with the rear end face of regulation first 5
Pit 50.The part in the centre bore of front shaft sleeve 4 of armature spindle 31 is provided with external thread section, external thread section and screwed hole 50
Engagement coordinates, by the linear motion for being converted into regulation first 5 of armature spindle 31, and by adjusting first 5 front end to stress
Part applies push-pull effort.It is appreciated that in other embodiments, external thread section can also be arranged on to the rear end of regulation first 5, screw thread
Hole is arranged on armature spindle 31.Preferably, the working of plastics that regulation first 5 can be formed using injection.
The operation principle of the stepper motor provided using the present embodiment is as described below：
Coil 23 is powered after the socket power of contact pin 72, and multipole is constituted using the pole tooth on a part for magnetic guiding loop 1, pole piece 22
Rotating excitation field is closed, the rotor driven axle 31 in the presence of rotating excitation field of rotor magnet 3 is rotated together.Because of turning for regulation first 5
Dynamic to be limited, under the helicitic texture effect between regulation first 5 and armature spindle 31, the rotation of armature spindle 31 is converted into regulation head
5 linear motion, makes the front end of regulation first 5 flexible relative to front shaft sleeve 4, to adjusting first 5 front end while regulation first 5 is flexible
Connection or against stressed member apply push-pull effort.
The stepper motor by the screw drive structure between armature spindle 31 and regulation first 5 by being moved out to the outer of magnetic guiding loop 1
Portion, so not only improves the radial dimension of reduction magnetic guiding loop 1, does not result in also and adjusts being greatly reduced for first 5 diameter, also would not
Cause the cost of regulation first 5 and stepper motor too high, solving the linear stepping motor of prior art, can not to take into account magnetic guiding loop straight
The problem that footpath reduces and motor cost is reduced.In addition, by by the screw drive structure between armature spindle 31 and regulation first 5
External screw thread is arranged on armature spindle 31, and internal thread is arranged in regulation first 5, can further be reduced armature spindle 31, be adjusted first 5
Manufacture difficulty and cost.
Present embodiment illustrates magnetic guiding loop 1 and the preferred structure of front shaft sleeve 4.As shown in figure 1, the magnetic guiding loop 1 has the
One cylindrical part 11 and the first end wall 12 positioned at the front end of the first cylindrical part 11, stator 2 are set in the first cylindrical part 11, pole piece 22
Outer peripheral edge and the internal perisporium of the first cylindrical part 11 be adjacent to.Front shaft sleeve 4 has the second cylindrical part 41 and positioned at the second cylindrical part 41
Second end wall 42 of rear end.The second cylindrical part 41 is preferably located in the outer peripheral edge of the second end wall 42 and interior it can be seen from Fig. 1
Position between periphery.Second cylindrical part 41 is located in the centre bore of the first end wall 12, the cylindrical part 41 of regulation first 4 and second
Centre bore is slidably matched.Second end wall 42 has the part being clamped between the first end wall 12 and the stator body 21 of stator 2, with
Realize the axially position of front shaft sleeve 4.
For limit front shaft sleeve 4 rotation, can between the second end wall 42 and the first end wall 12, and/or, the second end wall 42
The projection being engaged and recess structure are set between the stator body 21 of stator 2.The projection can for example be provided in second
End-tooth on the end face of end wall 42, recess is to be arranged on being used on the first end wall 12 or stator body 21 to accommodate the recessed of end-tooth
Shape structure.Or as shown in figure 3, projection 421 is preferably provided on the outer peripheral edge of the second end wall 42 and along footpath in the present embodiment
To stretching out, recess 20 is then arranged on stator body 21 and for accommodating projection 421.As can be seen from Figure, projection 421
And recess 20 is respectively two, it will be understood that the number of projection 421 and recess 20 can also be respectively one or more.Separately
Outside, it will be understood that in other unshowned embodiments, projection 421 is arranged on the outer peripheral edge of the second end wall 42 and along footpath
To when stretching out, recess 20 can also be configured on the wall of the second end wall of direction 42 of the first end wall 12.Furthermore, it is possible to manage
The configuration of solution, projection and recess also has many kinds, as long as the center line that can limit front shaft sleeve 4 relative to magnetic guiding loop 1 is rotated.
The preferred structure of limitation regulation first 5 and the relative rotation of front shaft sleeve 4 is also show in the present embodiment.As shown in figure 3,
The guide groove 410 axially extended is provided with the hole wall of the centre bore of the second cylindrical part 41, on the periphery wall of regulation first 5
It is provided with the guiding rib 510 being slidably matched with guide groove 410.It is appreciated that in other embodiments, guide groove and guiding rib exist
Position in second cylindrical part 41 and regulation first 5 can be exchanged.In addition, the guide groove 410 and the number of guiding rib 510 that are engaged
It can also set according to actual needs.
Referring again to Fig. 1, the center-hole diameter of the second end wall 42 is less than the centre bore of the second cylindrical part 41 in the present embodiment
Diameter, so, the middle part of armature spindle 31 be located in the centre bore of the second end wall 42 and can by second end wall 42 centre bore
Supporting.Meanwhile, second end wall 42 may also function as the effect of first 5 retracted position of limitation regulation.In addition, before stator bonnet 7
Side is configured with the shrinkage pool 70 for the rear end of support of rotor shaft 31.
The preferred embodiment of the axial movement of limitation armature spindle 31 is also show in the present embodiment.With reference to referring to figs. 1 to
Fig. 3, the stepper motor also includes the clamp 6 for being provided with U-lag 60, and clamp 6 is located in magnetic guiding loop 1 and is clamped in the second end wall 42
Between the stator body 21 of stator 2.Annular groove 310 is provided with armature spindle 31, the U-lag 60 of clamp 6 is fastened on annular
To limit the axial movement of armature spindle 31 in groove 310, so as to effectively control the axial float of armature spindle 31.By setting clamp 6,
Extra spring part can not be set in the rear end of armature spindle 31, can be prevented effectively from because spring part is applied to the pretension of armature spindle 31
Power and the abrasion caused.Preferably, clamp 6 can select the metal material with self-lubricating property to be made or by with profit certainly
The resin of slip is molded to be formed, and annular groove 310 and U-lag 60 coordinate for gap.
The assembling process for the stepper motor that the utility model first embodiment is provided is as described below：Rotor magnet 3 passes through note
Modeling or interference fit are combined into one with armature spindle 31.Stator body 21 and the integrated injection molding of stator bonnet 7, stator body
Pole piece 22 is embedded wherein in 21 forming processes.Contact pin 72 is inserted in the opening neck 71 of stator bonnet 7, in stator body
Coiling forms coil 23 on 21, and the first end of the end of coil 23 and contact pin 72 is connected.Clamp 6 is inserted to the ring of armature spindle 31
After in shape groove 310, rotor magnet 3 is put into inside stator body 21, the rear end of armature spindle 31 is inserted the shrinkage pool of stator bonnet 7
In 70.Regulation first 5 is set in front shaft sleeve 4, the screw thread engagement of regulation first 5 and armature spindle 31 coordinates, by front shaft sleeve 4 in stator
It is installed in place in main body 21.Afterwards, magnetic guiding loop 1 is installed in the front end of stator body 21, protection is installed in the rear end of stator bonnet 7
Lid 8.Then, the above-mentioned component being assembled together is subjected to local shell injection, injection molding connector body 9, connector master
The forming process of body 9 is reliably combined together with magnetic guiding loop 1, stator bonnet 7 and protection cap 8, makes the end cap portions 81 of protection cap 8
It is exposed.
Referring to Fig. 8, the second preferred embodiment of the present utility model is shown.Second preferred embodiment and above-mentioned the
It is in place of the main difference of one preferred embodiment in the axial limiting mode of armature spindle 31.As illustrated, the second preferred reality
Apply and clamp be not provided with example, but be provided with armature spindle 31 with front shaft sleeve 4 against the shaft shoulder 311, to limit armature spindle
31 forward movement；Be provided with the shrinkage pool 70 of stator bonnet 7 with the rear end of armature spindle 31 against steel ball 61, for limiting rotor
Axle 31 is moved rearwards by.The contact area of steel ball 61 and armature spindle 31 is small, and the friction to reduction armature spindle 31 is favourable.This kind spacing
Mode is particularly suitable for use in the motor that armature spindle 31 and rotor magnet 3 be made of plastics, because the rotor that plastics are made
Axle 31 and the lighter weight of rotor magnet 3, under vibrating conditions, axial impact force is smaller, weares and teares also smaller, now passes through the shaft shoulder
311 and steel ball 61 to armature spindle 3 carry out axial limiting can meet requirement.
In summary, the stepper motor that the utility model embodiment is provided, can support without using ball bearing, manufacture and fill
It is simple with technique, and reduce manufacturing cost.Led by the way that the screw drive structure between armature spindle 31 and regulation first 5 is moved out to
The outside of magnet ring 1, not only improves the radial dimension of the magnetic guiding loop 1 of reduction linear stepping motor, will not also bring cost significantly
Rise.Contact pin 72 is removably connected in the opening neck 71 of stator bonnet 7, can avoid the rotation stepping electricity of prior art
In machine and linear stepping motor contact pin 72 by it is overmolded integral with stator bonnet 7 when occur that contact pin is deformed, contact pin is shifted
The problems such as.Rotor magnet 3, armature spindle 31 and regulation first 5 can use moulding so that the stepper motor quality is lighter, shakes
It is dynamic smaller.In addition, connector body 9 is using local injection molding, and make the end cap portions 81 of protection cap 8 exposed, be both avoided that electricity
Machine internal structure stress deformation also helps positioning during injection.
It is understood that various embodiments above of the present utility model be merely to illustrate that principle of the present utility model and
The exemplary embodiment of use, the utility model is not limited thereto.For those skilled in the art, not
In the case of departing from spirit of the present utility model and essence, various changes and modifications can be made therein, and these variations and modifications are also regarded
For within protection domain of the present utility model.Protection domain of the present utility model is only by the language table of appended claims
The implication and its equivalents stated are limited.
Claims (13)
1. a kind of stepper motor, including：Magnetic guiding loop (1)；Stator (2), is sheathed in the magnetic guiding loop (1)；Stator (2) bag
Include stator body (21), pole piece (22) and coil (23)；It is configured at the stator bonnet (7) of the stator body (21) rear end；
Characterized in that, the stator bonnet (7) and the stator body (21) integrated injection molding, and the stator body (21) is logical
Overmolded mode is crossed to be integrally formed with the pole piece (22)；Opening neck is provided with rear side of the stator bonnet (7)
(71) contact pin (72), the first end of the contact pin (72) and the end of the coil (23), are connected with the opening neck (71)
Portion is connected, and the second end (722) of the contact pin (72) is used for socket power.
2. stepper motor according to claim 1, it is characterised in that also include：
Coordinate to block the protection cap (8) of the magnetic guiding loop (1) rear end with the stator bonnet (7)；
The protection cap (8) includes：End cap portions (81), lid is located in the opening of the opening neck (71)；Arc joint portion
(82), it is configured at least part edge of the end cap portions (81) and extends forward, with the rear termination with the magnetic guiding loop (1)
Close.
3. stepper motor according to claim 2, it is characterised in that also include：
Connector body (9), including annular sleeve (91) and the connection end (92) with the annular sleeve (91) integrated injection molding；Institute
Stating connector body (9) is configured to make at least part outer face (811) of the end cap portions (81) not to be connected device main body (9)
The configuration of injected plastics material covering；
The annular sleeve (91) is coated to the magnetic guiding loop (1), the stator bonnet fitted together in injection molding process
(7) and on the outer peripheral face of protection cap (8)；The front end of the magnetic guiding loop (1) protrudes from the front end of the annular sleeve (91)；
The connection end (92) extends from the annular sleeve (91) to the direction away from the annular sleeve (91) center, the company
Connecing end (92) has the inner space at the second end (722) for accommodating the contact pin (72).
4. stepper motor according to claim 3, it is characterised in that the end cap portions (81) are located at the annular sleeve (91)
Interior, the rear end of the annular sleeve (91) is provided with the opening (910) towards the end cap portions (81).
5. stepper motor according to claim 1, it is characterised in that also include：
Rotor magnet (3), is set in the stator body (21)；
Front shaft sleeve (4), the center line relative to the magnetic guiding loop (1) is un-rotatably configured at the front end of the magnetic guiding loop (1)；
Armature spindle (31), is configured on the center line of the rotor magnet (3) and un-rotatably matches somebody with somebody with the rotor magnet (3)
Close；The front end of the armature spindle (31) is extend into the centre bore of the front shaft sleeve (4)；
Adjust in head (5), the centre bore for being axially slidably set in the front shaft sleeve (4)；
Wherein, the front end of the regulation head (5) is stretched out from the front end of the front shaft sleeve (4), the rear end of the regulation head (5) and institute
Armature spindle (31) is stated by helicitic texture to coordinate.
6. stepper motor according to claim 5, it is characterised in that
The magnetic guiding loop (1) has the first cylindrical part (11) and the first end wall positioned at the first cylindrical part (11) front end
(12), the stator (2) is set in first cylindrical part (11)；
The front shaft sleeve (4) has the second cylindrical part (41) and the second end wall positioned at the second cylindrical part (41) rear end
(42)；
Second cylindrical part (41) is located in the centre bore of first end wall (12), the regulation head (5) and described the
The centre bore of two cylindrical parts (41) is slidably matched；Second end wall (42) have be clamped in first end wall (12) with it is described
Part between stator body (21)；Between second end wall (42) and first end wall (12) and/or described second
The projection being engaged (421) and recess (20) are provided between end wall (42) and the stator body (21), with limit it is described before
The rotation of axle sleeve (4).
7. stepper motor according to claim 6, it is characterised in that the projection (421) is arranged on second end wall
(42) on outer peripheral edge and extend radially outward.
8. stepper motor according to claim 6, it is characterised in that
The center-hole diameter of second end wall (42) is less than the center-hole diameter of second cylindrical part (41), the armature spindle
(31) middle part is supported by the centre bore of second end wall (42)；
The shrinkage pool (70) for supporting the armature spindle (31) rear end is configured with front side of the stator bonnet (7).
9. stepper motor according to claim 6, it is characterised in that also including the clamp (6) for being provided with U-lag (60),
The clamp (6) is located in the magnetic guiding loop (1) and is clamped between second end wall (42) and the stator body (21)；
Annular groove (310) is provided with the armature spindle (31), the U-lag (60) is fastened in the annular groove (310) to limit
The axial movement of the armature spindle (31).
10. stepper motor according to claim 6, it is characterised in that the hole of the centre bore of second cylindrical part (41)
It is provided with one of both periphery walls of wall and regulation head (5) in the guide groove (410) axially extended, another one
It is provided with the guiding rib (510) being slidably matched with the guide groove (410).
11. stepper motor according to claim 8, it is characterised in that be provided with the armature spindle (31) and described
Two end walls (42) against the shaft shoulder (311), be provided with the shrinkage pool (70) with the armature spindle (31) rear end against steel ball
(61)。
12. stepper motor according to claim 5, it is characterised in that
The material of the rotor magnet (3) is injection molded magnets, and the armature spindle (31) is metal shaft；Or, the rotor magnet
(3) material is injection molded magnets, and the material of the armature spindle (31) is the resin with self lubricity；
The rotor magnet (3) turns into one with the armature spindle (31) by interference fit, Nian Jie or overmolded mode
Body.
13. stepper motor according to claim 5, it is characterised in that the rear end face of the regulation head (5) is provided with along axle
To the screwed hole (50) of extension, the part in the centre bore of the front shaft sleeve (4) of the armature spindle (31) is provided with outside
Thread segment, the external thread section engages cooperation with the screwed hole (50), and the rotation of the armature spindle (31) is converted into institute
State the linear motion of regulation head (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720271117.2U CN206575260U (en) | 2017-03-20 | 2017-03-20 | Stepper motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720271117.2U CN206575260U (en) | 2017-03-20 | 2017-03-20 | Stepper motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206575260U true CN206575260U (en) | 2017-10-20 |
Family
ID=60054927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720271117.2U Withdrawn - After Issue CN206575260U (en) | 2017-03-20 | 2017-03-20 | Stepper motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206575260U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525764A (en) * | 2019-02-01 | 2020-08-11 | 宁波火山电气有限公司 | Light inertia permanent magnet motor and manufacturing method thereof |
-
2017
- 2017-03-20 CN CN201720271117.2U patent/CN206575260U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111525764A (en) * | 2019-02-01 | 2020-08-11 | 宁波火山电气有限公司 | Light inertia permanent magnet motor and manufacturing method thereof |
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| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 241009 Anhui city of Wuhu Province Silver Lake Economic and Technological Development Zone No. 27 North Road Patentee after: WeiPai automotive electronics (Wuhu) Co.,Ltd. Address before: 241009 Anhui city of Wuhu Province Silver Lake Economic and Technological Development Zone No. 27 North Road Patentee before: Continental automotive electronics (Wuhu) Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171020 Effective date of abandoning: 20240607 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20171020 Effective date of abandoning: 20240607 |