CN100517914C - Motor apparatus having rotational position detector - Google Patents
Motor apparatus having rotational position detector Download PDFInfo
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- CN100517914C CN100517914C CNB2005100897944A CN200510089794A CN100517914C CN 100517914 C CN100517914 C CN 100517914C CN B2005100897944 A CNB2005100897944 A CN B2005100897944A CN 200510089794 A CN200510089794 A CN 200510089794A CN 100517914 C CN100517914 C CN 100517914C
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Abstract
The motor 1 is provided with a yoke housing 4, a gear housing 41 for accommodating a worm shaft 42 and a worm wheel 43, and a brush holder 7 having a holder body 7b disposed between the yoke housing 4 and the gear housing 41 and holding brushes 10a, 10b. A fixed contact (contact members 31-33) slidably provided on a movable conductive plate provided on the end face of the worm wheel 43 contacts and does not contact the movable conductive plate in response to the rotation of the worm wheel 43. A communication hole 51d is formed at the end on the yoke housing side of the gear housing 41, and makes the interior of the gear housing 41 communicate with the yoke housing. The fixed contact is provided in the brush holder 7, and extends into the gear housing 41 through the communication hole 51d.
Description
Technical field
The present invention relates to have the electric machine of rotational position detector, particularly be suitable for the electric machine of wiper (wiper) system of vehicle.
Background technology
Traditionally, employed electric machine has electric motor units that is provided with armature and the gear unit that is provided with reducing gear.In reducing gear, the surface of gear (wheel gear) is provided with have the particular conductivity pattern on it switch boards of (conductor pattern), and the gear housing of gear unit is provided with fixed terminal (for example with reference to JP-060-44371-U).In the electric machine of this type, as the switch detector, electric machine is suitable for such as wiper motor like this according to the switch boards of the position of rotation of gear and the contact between the fixed terminal.That is, the electric machine of this type is provided with so-called returning automatically and stops (return-and-stop) mechanism.When wiper control is closed to stop the operation of wiper system, electric machine is not to stop immediately, but specific on the window that Wiper arm is moved to vehicle stops after leaving the position.
In above-mentioned electric machine according to JP-06-44371-U, the gear housing comprises housing body, and described housing body is provided with the reception sunk part and is used to receive gear etc., and lid, and described lid is fixed on to receive on the sunk part and is used to cover described reception sunk part.On the base section that receives sunk part, form receiving unit.The output shaft of electric machine is inserted in the holding portion and by described receiving unit and supports.Gear is used for the rotation of gear is converted to the motor switching mechanism, the fixed terminal that back and forth rock motion of output shaft and covers order assembling on the axial direction of receiving unit, promptly on the depression direction of receiving unit.
But, the mechanical moving structure of receiving unit setting such as movement conversion mechanism and such as the electric structure of fixed terminal and the switch boards of the gear in single space wherein.Like this, mechanical travel mechanism and electric structure just must be set, to avoid the interference between them, the electricity wire structures is set at outside the gear housing thus.Correspondingly, be fixed on connector unit (wiring) outside the gear housing with the splicing ear of fixed terminal be connected to the splicing ear of brush with the excitation armature, to make wire structures elongated and complicated, increase the number of parts and the number of the course of work, and the reliability that has reduced the waterproof of wire structures.
Summary of the invention
The present invention is implemented and is used to address the above problem, and purpose provides a kind of electric machine, and the wire structures of described electric machine is short and simple, and the water proofing property of wire structures can be easy to and obtain reliably and the further operability of improvement assembling.
Electric machine has electric motor units, connector part and deceleration unit.Electric motor units is provided with inner terminal and encourages by inner terminal.Connector part has external terminal.Deceleration unit is provided with worm shaft, worm gear, switch boards and gear housing.Worm shaft rotatably is driven by electric motor units.Worm shaft reduces and exports the rotation of worm shaft.The rotation of switch boards and worm gear one also has predetermined conductor pattern to contact to be connected and to disconnect with inner terminal and the external terminal position of rotation according to worm shaft between external terminal and inner terminal.The gear housing is fixed to electric motor units and surrounds worm shaft, worm gear and switch boards therein.The gear housing is provided with intercommunicating pore, and the outer surface of described intercommunicating pore by electric motor units covers and allow inner terminal and external terminal pass through towards switch boards.
According to an aspect of the present invention, provide a kind of electric machine, having comprised: electric motor units is provided with: a plurality of terminals; The yoke housing of cylinder form has flange portion on the circumference of the opening portion of the yoke housing of cylinder form; Brush holder, have retainer main part, flange portion, contact base portion part and connector part, integrally formed by resin material, described retainer main part keeps brush, described flange portion extends radially outwardly in flange shape mode from described retainer main part, and described contact base portion part is extended from described flange portion, and in the described connector part exposed terminal at least one, to be connected to the external control unit, described electric motor units encourages by terminal; Contact portion, described contact portion is electrically connected at least one in the described terminal, and is partly supported by described contact base portion; And deceleration unit, described deceleration unit is provided with: worm shaft, described worm shaft rotatably drives by described electric motor units, worm gear, be used to reduce and export the rotation of worm shaft, switch boards, the rotation of described switch boards and worm gear one also has predetermined conductive pattern and is used for contacting with described contact portion according to the position of rotation of worm gear, thereby terminal is electrically connected to each other, terminal is disconnected each other; And the gear housing, described gear housing is fixed to electric motor units and surrounds worm shaft, worm gear and switch boards therein; And intercommunicating pore communicates with each other the interior space of electric motor units and gear housing, and described intercommunicating pore is separated by described electric motor units and gear housing and space outerpace, described intercommunicating pore by the contact base portion part of brush holder and contact portion by wherein giving prominence to towards switch boards.
Others of the present invention and/or advantage will perhaps be recognized by implementing the present invention from following and partly can obtain explanation from specification.
Description of drawings
Wherein:
Fig. 1 is the perspective view of electric machine according to an embodiment of the invention;
Fig. 2 is the viewgraph of cross-section according to the major part of the electric machine of described embodiment;
Fig. 3 is the plan view according to the brush holder of the electric machine of described embodiment;
Fig. 4 is the end view of the brush holder of electric machine according to an embodiment of the invention;
Fig. 5 is the upward view according to the brush holder of the electric machine of described embodiment;
Fig. 6 is according to the contact terminal of described embodiment and the viewgraph of cross-section of the coupling part between the contact component;
Fig. 7 is the schematic cross-sectional view according to the electric machine of described embodiment;
Fig. 8 is the explanation view according to the mechanism of the switch boards of the electric machine of described embodiment; And
Fig. 9 is the schematic circuit diagram according to the electricity structure of the electric machine of described embodiment.
Embodiment
In following, described according to electric machine of the present invention.Electric machine 1 is to be used to start wiper system (particularly rear wiper system).As shown in Figure 1, electric machine 1 is provided with electric motor units 2 and gear unit 3 (deceleration unit).
Retainer main part 7b roughly is installed in the open side part of yoke housing 4.As shown in Figure 2, retainer main part 7b is provided with centre bore to keep bearing 8 therein.Bearing 8 rotatably supports the leading end sidepiece part of the rotating shaft 9 of armature 6.In addition, retainer main part 7b keeps brush 10a, the 10b of electric motor units 2, and it is used to encourage armature 6.Brush 10a, 10b are set within the yoke housing 4 and with rectifier (rectifier) 11 pressure and contact, and described rectifier 11 is fixed on the rotating shaft 9.Flange portion 7c radially outward extends from retainer main part 7b with flange shape form.Extension 7d extends at the Width Dw of electric motor units 2 to the radially outer position of the arch section 4a of relative rotation axi 9 wall yoke housings 4 from the part of flange portion 7c.
Shown in Fig. 2,4, contact base portion part 7f extends and corresponding extension 7d and/or flange portion 7c from the part of the armature retainer resin body 7a between retainer main part 7b and connector part 7e, and it is away from yoke housing 4 (downward in the drawings).As shown in Figure 5, contact base portion part 7f is set among butt joint (butt) the calmodulin binding domain CaM B, wherein yoke housing 4 and gear housing 41 dock each other in conjunction with so that brush holder resin body 7a to be set betwixt, with on the thickness direction Dt of electric motor units 2 (on the downside among Fig. 5) than one of the more close flat part 4b of another one (another one flat part 4b) of flat part 4b (a flat part 4b).Contact base portion part 7f has plate-like shape, and it approaches (with reference to Fig. 1) on the thickness direction Dt of electric motor units 2.
As shown in Figure 5, brush holder 7 further is provided with 5 terminal 21-25, and it can lead the metallic plate manufacturing by electricity.Among the implanted brush holder resin body of each the terminal 21-25 7a to expose its part.
Shown in Fig. 2,4 and 5, brush holder 7 further is provided with contact component 31-33.Contact component 31-33 electricity respectively is connected to the whose forwardmost end portions of contact terminal 22a-24a, promptly rises part 22b-24b.Especially, each contact component 31-33 can be led the metallic plate manufacturing and is used as the sheet spring by the electricity with certain elasticity.Shown in Fig. 4,6, each contact component 31-33 is provided with base portion end sections 31b-33b, sloping portion 31c-33c and guiding end sections 31d-33d.Each base portion end sections 31b-33b is provided with through hole 31a-33a.Guiding end sections 31d-33d is formed on the front end of sloping portion 31c-33c.Sloping portion 31c-33c extends to guiding end sections 31d-33d was bent and tilted to contact base portion part 7f with elasticity a surface from base portion end sections 31b-33b.As shown in Figure 6, contact component 31-33 is inserted through through hole 31a-33a and they is fixed (cottering) with pin and be respectively fixed to and rise on the part 22b-24b by rising part 22b-24b.Contact base portion part 7f is provided with assembly hole 7g on an other surface, assembly hole 7g aligns with rise part 22b-24b like this.Contact portion 31-33 is being fixed to pin on the rise part 22b-24b, assembling fixture is inserted among the assembly hole 7g to rise part 22b-24b from the relative bottom sides upper support of usefulness pin fixation side.Contact component 31-33 side is alignd to extend parallel to each other by side.In the present embodiment, contact terminal 22a-24a and contact component 31-33 form three fixed contacts, keep to the side to align on the plane that is parallel to flat part 4b in described fixed contact limit.
As shown in Fig. 3-5, brush holder 7 is provided with seal 34 on brush holder resin body 7a.Seal 34 roughly centers on flange portion 7c, extension 7d etc. by elastomer manufacturing and setting.
As shown in Figure 1, 2, gear parts 3 be provided with gear housing 41, worm shaft 42, worm gear 43, sector gear (equipment gear) 44, apart from holding plate 45 and output shaft 46.In the present embodiment, worm shaft 42 and worm gear 43 forms the rotation that reducing gears and worm gear reducer mechanism are reduced with the rotation that reduces armature 6 and output.
As mentioned above, receive sunk part 51a on the thickness direction Dt of electric motor units 2 towards other flat part 4b opening, promptly in Fig. 2 forward.Like this, contact base portion part 7f and the relative worm gear 43 of fixed contact (contact terminal 22a-24a and contact component 31-33) than the more close described flat part 4b of other flat part 4b (among Fig. 2 backward) is set in the base section side that receives among the sunk part 51a.In addition, as shown in Figure 6, be provided with contact surface S on the position on the base section of the reception sunk part 51a of housing body 51, described contact surface S contacts with contacting base portion part 7f, the position of the corresponding contact in described position base portion part 7f.Contact surface S is formed on the inner surface of housing body 51 the guiding end sections that the assembly hole 7g of contact base portion part 7f relatively surpasses contact terminal 22a-24a.Like this, the guiding end sections of contact base portion part 7f contacts with contact surface S.In addition, on the position on the base section of the reception sunk part 51a of the housing body 51 of corresponding assembly hole 7g relatively contact surface S be provided with depression.In described depression, form chamber K as being used for the insulated part from housing body 51 insulation with contact terminal 22a-24a.
Receive sunk part 51a and comprise worm screw receiving unit 51e, wheel receiving unit 51f, output shaft receiving unit 51g etc., it communicates with each other therein.
Worm screw receiving unit 51e is formed extending on the line stretcher of rotating shaft 9, and rotatably supports worm shaft 42 therein.Joint 53 connects worm shaft 42 and rotating shaft 9 rotates them with one.
As shown in Figure 2, the relative worm screw receiving unit of wheel receiving unit 51f 51e is arranged on connector part 7e and is arranged on the identical side, and rotatably supports worm gear 43 therein.The part of worm gear 43 cooperates with worm shaft 43.Worm gear 43 is set up the thickness direction Dt that such rotation is parallel to electric motor units 2.As shown in Figure 8, on a side surface of the worm gear 43 relative, be provided with switch boards 54 with the lower surface that receives sunk part 51a.Switch boards 54 has specific conductive pattern thereon, and this is traditionally known.Especially, switch boards 54 forms with worm gear 43-body.Guiding end sections 31d-33d pressure and the sliding contact switch boards 54 of contact component 31-33.Specific conductive pattern on each leading end part 31d-33d of contact component 31-33 and the switch boards 54 contacts or disengages according to the position of rotation of worm gear 43.
Output shaft receiving unit 51g is formed on the opposite flank with the relative worm screw receiving unit of wheel receiving unit 51f 51e from connector part 7e.As shown in Figure 1, output shaft receiving unit 51g in be provided with output shaft support section 51h in the heart and stretch out with cylinder form on thickness direction Dt at electric motor units 2.Output shaft receiving unit 51g rotatably supports output shaft 46.The base portion end sections of output shaft 46 is set among the output shaft receiving unit 51g, outside the outstanding output shaft receiving unit 51g of the guiding end sections of output shaft 46.The fore-end of output shaft 46 is associated with the wiper of vehicle (rear portion wiper) W and starts the wiper W of described vehicle, and its signal is presented among Fig. 1.
Then, the electricity structure of electric machine 1 and the being used to external control unit of controlling wiper system describes with reference to Fig. 9.Electric machine 1 and external control unit are tied connector part 7e and are connected to each other by the outconnector of external control unit is taken.
The terminal part 21,23,24 that is exposed among the connector part 7e is connected respectively to the selector switch 61 that is arranged in the vehicle driver seat.Terminal 22 ground connection.The terminal 24 that is exposed among the connector part 7e is connected to power supply E, i.e. the battery of vehicle.In the present embodiment, selector switch 61, form outer control unit with power supply E.
Selector switch 61 has " off " the position P1 that is used for disable motor device 1 and opens " on " position P2 of electric machine 1.Selector switch 61 is connected to terminal 23 with terminal 21 when forwarding off-position (off position) P1 to, when forwarding open position (on position) P2 to terminal 21 is connected to power supply E.
In the electric machine with aforesaid electricity wiring, when selector switch 61 forwarded open position P2 to, the brush 10a of electric motor units 2 was connected to power supply E with operating electrical machines device 1.That is, output shaft 46 crankmotions are to carry out wiper W.
When selector switch 61 when open position P2 switches to off-position P1, the direct connection between brush 10a and the power supply E is interrupted, brush 10a is connected to contact component 32 by terminal 23.Herein, if be in the specific angular position to be connected contact component 31 and contact component 32 with the switch boards 54 of worm gear 43 one rotations, the terminal 23 that is connected to brush 10a passes through contact component 31,32 ground connection, and electric machine 1 stops like this.
In the position that connects contact component 32 and contact component 33, the terminal 23 that is connected to brush 10a is not connected to power supply E by contact component 32,33 if switch boards 54 is in the specific angular position.Like this, electric machine 1 continues operation.Then, when the specific angular position of switch boards 54 arrival of one and worm gear 43 rotations, the terminal 23 that is connected to brush 10a is connected to ground by contact component 31,32, and electric machine 1 stops like this.Promptly, selector switch 61 switches on the off-position P1 from open position P2, and the position of rotation of the switch boards 54 that detects by the contact between contact component 31-33 (contact portion 31d-33d) and the switch boards 54 stops switch boards 54 and worm gear 43 automatically on specific angular position.
When switch boards 54 and worm gear 43 are in the specific angular position, state as shown in Figure 9, wiper W are configured to and are in such as in the locational specific off-position of the lower end of rear window.Like this, by selector switch 61 is switched to off-position P1 from open position P2, wiper W stops on the specific off-position automatically.
Then, favourable action and the effect according to the electric machine of the above embodiments will describe following.
(1) fixed contact (contact terminal 22a-24a and contact component 31-33) is arranged in the brush holder 7, and electrical devices is collected in the brush holder 7 with brush 10a, 10b like this.Like this, even be connected under the situation of brush 10b at contact terminal 22a and contact component 31, the wire structures that is used to connect them can be reduced to the terminal 22,25 that only is arranged on the brush holder 7.In addition, even when contact terminal 22a-24a and contact component 31-33 are connected to external control unit (selector switch 61, with power supply E), the wire structures that is used for connecting them can be reduced to the terminal 21-25 that only is arranged on brush holder 7 with brush 10a, 10b.
In addition, the intercommunicating pore 51d that is configured on the yoke housing 4 sides part of the housing body 51 of brush holder 7 by being formed on gear housing 41 of fixed contact (contact terminal 22a-24a and contact component 31-33) extends to the reception sunk part 51a of gear housing 41.Like this, just can provide wiring that contact terminal 22a is connected with brush 10b with contact component 31, promptly terminal 22,25, and shorter and obtain water proofing property easily and firmly than the traditional electric machine with the wiring outside the gear housing.
In addition, the relative worm gear 43 of fixed contact (contact terminal 22a-24a and contact component 31-33) is arranged on the base section side that receives sunk part 51a; Thus, be arranged on fixed contact on the base section lateral parts in the assembled main body of yoke housing 4, housing body 51 and brush holder 7 and do not hinder worm gear 43 etc. and be installed to and receive among the sunk part 51a, and no matter projection to the layout that receives the fixed contact among the sunk part 51a.That is, with after fixed contact being protruded into reception sunk part 51a, just can at an easy rate worm gear 43 grades be installed among the reception sunk part 51a at assembling yoke housing 4, housing body 51 and brush holder 7.Herein, fixed contact has elasticity on the direction perpendicular to the surface of switch boards 54, and described switch boards 54 is integrally formed on the worm gear 43, with as the sheet spring to contact with switch boards 54 pressure.Then, on fixed contact being set to the base section that receives sunk part 51a after, worm gear 43 can be installed on the elasticity direction; Fixed contact can be easy to and stably contact with switch boards 54 pressure thus.
(2) brush holder 7 is provided with connector part 7e, and described connector part 7e is arranged on outside yoke housing 4 and the gear housing 41, is connected to connector part 7e will control unit (selector switch 61, with power supply E) outward; Electrical devices is collected in the brush holder 7 further thus.Like this, the terminal of brush 10a, 10b, fixed contact and connector part 7e wire structures be reduced to terminal 21-25, this forms relatively with the electric machine that wherein connector part and brush holder are provided with respectively.Especially, by forming brush holder 7 to implant terminal 21-25 terminal 21-25 is placed among the brush holder resin body 7a that is molded by inserting mould therein, the electrical insulation performance of terminal 21-25 is fixed more reliably.
(3) the relative worm-wheel shaft 42 of connector part 7e be set at worm gear 43 same side on.Like this, the structure that is used to shorten the distance between connector part 7e and the fixed contact (contact terminal 22a-24a and contact component 31-33) moves with the structure that is used to be provided with fixed contact, described fixed contact be formed on switch boards 54 sliding contacts on the worm gear 43, relatively worm shaft 42 and worm gear 43 same side with not with worm shaft 42 interferences.Correspondingly, just fixed contact can be set and not connect up (terminal 22-24) to be connected contact and the connector part 7e that is fixed with worm shaft 42 interferences and shortening.In addition, for example, fixed contact can be arranged between retainer main part 7b and the connector part 7e, and brush holder 7 can form less relatively size like this.
(4) brush holder 7 has with the integrally formed base portion part 7f that contacts of retainer main part 7b and receives among the sunk part 51a to extend to by intercommunicating pore 51d with fixed contact (contact terminal 22a-24a and contact component 31-33).That is, fixed contact supports by contact base portion part 7f, and described contact base portion part 7f and retainer main part 7b are integrally formed, receive among the sunk part 51a to extend to.Be provided to like this be formed on worm gear 43 on switch boards 54 mutually the fixed contact of sliding contact can support near the worm gear 43 in the gear housing 41; Fixed contact can be easy to and contact with switch boards 54 phase pressures reliably thus.In addition, with retainer main part 4b integrally formed contact the number that base portion part 7f has reduced the parts of electric machine 1.
(5) contact base portion part 7f and retainer main part 7b are directly supported by housing body 51 from the other surface that contact base portion part 7f (lower surface Fig. 5,6) relative with switch boards 54 contacted fixed contacts (contact terminal 22a-24a and contact component 31-33) by the resin material manufacturing.Like this, housing body 51 receives the reaction force of the pressure contact force of fixed contacts, contact thus that base portion part 7f is prevented from being out of shape and fixed contact can be more easily with reliably be formed on worm gear 43 on switch boards 54 phase pressures contact.
In addition, the contact base portion part 7f of support fixation contact (contact terminal 22a-24a and contact component 31-33) yoke housing 4 and gear housing 41 butt joints therein are bonded to each other to extend from brush holder resin body 7a (extension 7d between retainer main part 7b and the connector part 7e and/or flange portion 7c) among the butt joint calmodulin binding domain CaM B that brush holder resin body 7a is set betwixt.Like this, yoke housing 4 and gear housing 41 limit brush holder resin body 7a betwixt to reduce the distortion of brush holder resin body 7a; Position of rotation accuracy of detection and the switching precision by fixed contact can be guaranteed thus.
In addition, in butt joint calmodulin binding domain CaM B, yoke housing 4, gear housing 41 and brush holder resin body 7a form anti-hydrospace therein.Like this, anti-hydrospace makes the electrical devices waterproof of fixed contact (contact terminal 22a-24a and contact component 31-33) on being installed to brush holder resin body 7a.
(6) fixed contact comprises the contact terminal 22a-24a of the part of the terminal 22-24 that is arranged in the brush holder 7, and the leading end (rising part 22b-24b) that anchors to contact terminal 22a-24a is gone up and have the contact component 31-33 of elasticity to contact with switch boards 54 pressure from anchor point on the guiding end sections.In addition, contact base portion part 7f is provided with assembly hole 7g on its another one surface, like this assembly hole 7g with guide the end section aligned, i.e. rising part 22b-24b is to be fixed to contact element 31-33 on the rising part 22b-24b.Like this, just can be easy to by the base section that supports rising part 22b-24b on rising part 22b-24b with pin fixed contact spare 31-33 by the assembling fixture that is inserted through assembly hole 7g.
In addition, the base section of the reception sunk part 51a of housing body 51 is provided with depression to form chamber K therein, and the guiding end sections that is exposed to the contact terminal 22a-24a (rising part 22b-24b) of housing body 51 and contact component 31-33 thus in assembly hole 7g is from housing body 51 electrical insulation by the electric conducting material manufacturing.Like this, for example, there is no need in relatively large length, to form assembly hole 7g between contact terminal 22a-24a and contact component 31-33, to obtain electrical insulation, assembly hole 7g can form less relatively length like this, and contact base portion part 7f can be formed on less relatively thickness.
(7) be arranged on the chamber K that is formed in the housing body 51 and be used as insulated part; The specific features that is used for insulated part does not thus need, and the effect (6) that rises can realize by simple relatively structure.
(8) yoke housing 4 has less relatively thickness (on the direction perpendicular to flat part 4b) on the thickness direction Dt of electric motor units 2, and the rotation of worm gear 43 is set up the thickness direction Dt that is parallel to electric motor units 2; Thus, the gear housing 41 that worm gear 43 is installed therein can be formed on the thickness direction Dt of electric motor units 2 and have less relatively thickness.In addition, fixed contact (contact terminal 22a-24a and contact component 31-33) is kept to the side to be arranged on the plane parallel with flat part 4b by the limit; Gear housing 41 can form less relatively thickness thus.In addition, can share relatively large accommodation space on the Width Dw of electric motor units 2 in gear housing 41, the electrical insulation among the fixed contact can be easy to obtain thus.
(9) fixed contact is kept to the side to be provided with to be roughly parallel to by the limit and is extended (contact terminal 22a-24a is parallel to each other, and contact component 31-33 is parallel to each other) each other; Fixed contact can be installed in the less relatively space thus, and fixing contact can penetrate among the intercommunicating pore 51d that is formed on less relatively size.Like this, just can simplify gear housing 41 housing body 51 design and be easy to assemble brush holder 7 and gear housing 41 (housing body 51).
(10) connector part 7e is set on the side of an arch section 4a of yoke housing 4, and shown in the signal of Fig. 7, the profile of connector part 7e is set within the scope T (with reference to Fig. 7) between a pair of flat part 4b on the thickness direction Dt of electric motor units 2.Like this, connector part 7e allows electric machine 1 to have less relatively thickness.
(11) in fixed contact (contact terminal 22a-24a and contact component 31-33), the base portion end sections 31b-33b of sloping portion 31c-33c is arranged on a flat part 4b side by relative worm shaft 42, promptly than another one flat part 4b a more close flat part 4b is set, the rotation of described other flat part 4b and armature 6 is coaxial.Like this, fixed contact can be arranged on the base section side that receives sunk part 51a at an easy rate, like this fixed contact on the thickness direction Dt of the electric motor units 2 except guiding end sections 31d-33d not with worm gear 43 interferences.
(12) output shaft 46 supports by being formed on the output shaft holding portion 51h that holds in the main body 51.Like this, particularly under the situation by the aluminium alloy manufacturing, compare by the structure that lid supported that is fixed on the housing body with output shaft as in the present embodiment holding main body 51, output shaft 46 can be easy to and be supported tightly.In addition, sector gear 44 relative worm gears 43 are set on the open side that receives among the sunk part 51a, and fixed contact is set on the surface of worm gear 43 like this, and sector gear 44 is set on the other surface of worm gear 43.Like this, fixed contact not with sector gear 44 interferences, the layout of fixed contact and sector gear 44 can be easy to be designed like this.In addition, in assembling yoke housing 4, housing body 51 and brush holder 7, just fixed contact can be arranged on the bottom sides that receives sunk part 51a, progressively worm gear 43 and sector gear 44 be installed among the reception sunk part 51a then; The assembling of electric machine 1 becomes easy thus.
The foregoing description can followingly be made amendment.
In the above-described embodiment, contact terminal 22a-24a and contact component 31-33 form fixed contact.But other component parts can form fixed contact, as long as fixed contact is set in the brush holder 7 with among the reception sunk part 51a that extends to gear housing 41 by intercommunicating pore 51d.For example, terminal 22-24 and contact terminal 31-33 can be integrally formed, and the part of so corresponding contact terminal 22a-24a and contact terminal 31-33 forms fixed contact.In this structure, the number of parts can be reduced.In addition for example, the terminal part 22-24 of corresponding contact terminal 22a-24a can be from forming separately with the other parts institute of the integrally formed terminal 22-24 of contact terminal 31-33.In this structure, terminal 22-24 is not provided with contact terminal 22a-24a, and is connected to contact terminal 31-33 on the position outside the reception sunk part 51a of gear housing 41.
The connector part 7e that is formed in the brush holder 7 is not limited thereto structure, and can form (retainer main part 7b) separately from brush holder 7.
In the above-described embodiment, connector part 7e has relative worm shaft 42 is arranged on structure on the side identical with worm gear 43.But the layout of connector part 7e is not limited thereto structure, and can be modified, and connector part 7e is provided with worm shaft 42 (connector part 7e is set on the side respect to one another with worm gear 43 relative worm shafts 42 like this) betwixt with worm gear 43 like this.
In the above-described embodiment, brush holder 7 has the structure of contact base portion part 7f, and itself and retainer main part 7b are integrally formed to be entered and hold sunk part 51a and support fixation contact to extend through intercommunicating pore 51d.But the invention is not restricted to this structure, and can be modified to other structure.For example, the contact base portion of support fixation contact part can form and be fixed to brush holder to extend to by intercommunicating pore 51d the reception sunk part 51a from retainer main part branch separately.Alternatively, can be fixed to the gear housing from the formed contact base portion part of retainer main part separately.In addition, brush holder can be only in the external support fixed contact of the reception sunk part 51a of gear housing 41.
In the above-described embodiment, housing body 51 directly supports contact base portion part 7f.But described structure can be modified, and contacts base portion part 7f like this and does not directly contact with housing body 51.
In the above-described embodiment, contact base portion part 7f is provided with assembly hole 7g.But described structure can be modified, and contacts base portion part 7f like this assembly hole 7g is not set.In addition, can be alternatively fixing by fixing the contact component 31-33 of the guiding end sections that is fixed to contact terminal 22a-24a with pin in the above-described embodiment by spot welding etc.In this case, assembly hole 7g can be used to insert anchor clamps and is used for spot welding.
In the above-described embodiment, the part of the housing body 51 of corresponding assembly hole 7g is provided with depression so that chamber K to be provided, and described chamber K is as insulated part.But, the invention is not restricted to this structure, and the part of the housing body 51 of corresponding assembly hole 7g can be provided with by formed other insulated part of other parts (for example insulating sealer etc.).
In the above-described embodiment, yoke housing 4 is formed flat pattern, with the motor of the wiper system within the door that is suitable for being installed in vehicle.But the shape of yoke housing 4 is not limited thereto structure and can be revised as cylindrical or other.
In the above-described embodiment, fixed contact is kept to the side to be provided with extend parallel to each other (contact terminal 22a-24a is parallel to each other, and contact component 31-33 is parallel to each other) by the limit.Contact component can be configured to extend on different directions from each other.In addition, the contact component 31-33 with shape identical with the above embodiments can have the length configurations differing from one at them.
Electric machine according to the present invention is not limited to be used for the electric machine 1 that the rear portion wiper system of the above embodiments is used, and can be applied to anterior wiper system naturally.In this case, for example, electric machine can be formed, and do not have fan-shaped except 44 and apart from holding plate 45 with worm gear 43 rotating output shafts, output shaft is connected to anterior wiper by the linkage that is installed on the vehicle.In addition, can be applied to other system (such as power window system and sunshade ceiling system) except wiper system according to electric machine of the present invention.In addition, the sector gear 44 that connects worm gear 43 and output shaft 46 can be modified to other equipment gear parts, such as the simple reduction gearing according to the use of electric machine.
Although present invention has been described with reference to preferred embodiments, those of ordinary skill is appreciated that under the situation that does not deviate from the spirit and principles in the present invention and can makes amendment and change the present invention that its scope is limited by appended claims.
Claims (18)
1. an electric machine (1) comprising:
Electric motor units (2) is provided with:
A plurality of terminals (21-25);
The yoke housing (4) of cylinder form has flange portion on the circumference of the opening portion of the yoke housing (4) of cylinder form; And
Brush holder (7), has retainer main part (7b), flange portion (7c), contact base portion part (7f) and connector part (7e), integrally formed by resin material, described retainer main part (7b) keeps brush (10a, 10b), described flange portion (7c) extends radially outwardly in flange shape mode from described retainer main part (7b), described contact base portion part (7f) is extended from described flange portion (7c), and at least one in described connector part (7e) exposed terminal (21-24), to be connected to the external control unit
Described electric motor units (2) is energized by terminal (21,25);
Contact portion (31-33), described contact portion (31-33) is electrically connected at least one in the described terminal (21-24), and is supported by described contact base portion part (7f); And
Deceleration unit (3), described deceleration unit (3) is provided with:
Worm shaft (42), described worm shaft (42) rotatably drive by described electric motor units (2),
Worm gear (43) is used to reduce and export the rotation of worm shaft (42),
Switch boards (54), the rotation of described switch boards (54) and worm gear (43) one also has predetermined conductive pattern and is used for contacting with described contact portion (31-33) according to the position of rotation of worm gear (43), thereby terminal (22-24) is electrically connected to each other and terminal (22-24) is disconnected each other; And
Gear housing (41), described gear housing (41) are fixed to electric motor units (2) and surround worm shaft (42), worm gear (43) and switch boards (54) therein; And intercommunicating pore (51d) communicates with each other the interior space of electric motor units (2) and gear housing (41), and described intercommunicating pore (51d) is separated with space outerpace by described electric motor units (2) and gear housing (41), and described intercommunicating pore (51d) allows the contact base portion part (7f) of brush holder (7) and contact portion (31-33) pass through wherein outstanding towards switch boards (54).
2. electric machine according to claim 1 (1) is characterized in that, switch boards (54) is fixed on the side surface of worm gear (43).
3. electric machine according to claim 1 (1) is characterized in that, connector part (7e) is exposed to outside the yoke housing (4).
4. electric machine according to claim 1 (1) is characterized in that:
Gear housing (41) and connector part (7e) are set on the same side of worm shaft (43).
5. electric machine according to claim 1 (1) is characterized in that:
Gear housing (41) supports contact base portion part (7f) to hold because of the reaction force that contact was produced between contact portion (31-33) and the switch boards (54).
6. electric machine according to claim 1 (1) is characterized in that:
Terminal (21-25) is fixed on the brush holder (7), and described terminal and contact portion (31-33) form separately, and is connected in contact portion (31-33) and the brush (10a, 10b) at least one.
7. electric machine according to claim 1 (1) is characterized in that:
Contact portion (31-33) be cantilever spring and be configured to its guiding end sections (31d-33d) contact with switch boards (54) pressure.
8. electric machine according to claim 6 (1) is characterized in that:
The part of terminal (22-24) is embedded in the described contact base portion part (7f); And
Described contact base portion part (7f) is provided with assembly hole (7g), described assembly hole (7g) exposes terminal (22-24) wherein, and described assembly hole (7g) forms so that assembling fixture is inserted wherein, and described assembling fixture is used for contact portion (31-33) is fixed to terminal (22-24).
9. electric machine according to claim 8 (1) is characterized in that:
Gear housing (41) can be led the material manufacturing by electricity and is provided with insulated part (K), described insulated part (K) with assembly hole (7g) from gear housing (41) electrical insulation.
10. electric machine according to claim 9 (1) is characterized in that: insulated part (K) is formed in the chamber in the depression on the inner surface of gear housing (41).
11. electric machine according to claim 1 (1) is characterized in that:
Yoke housing (4) has flat pattern with bigger radial thickness on having than the thickness direction (Dt) in electric motor units (2) on the Width (Dw) of electric motor units (2);
Contact portion (31-33) is set up the thickness direction (Dt) perpendicular to electric motor units (2).
12. electric machine according to claim 11 (1) is characterized in that, a plurality of contact portions (31-33) are set parallel to each other.
13. electric machine according to claim 11 (1) is characterized in that:
Connector part (7e) is set on the side of yoke housing (4) on the Width (Dw) of electric motor units (2); And
Connector part (7e) is shaped to be arranged within the radial thickness of the yoke housing (4) on the thickness direction (Dt) of electric motor units (2).
14. electric machine according to claim 11 (1), it is characterized in that, contact portion (31-33) is provided with sloping portion (31c-33c), described sloping portion (31c-33c) tilts towards switch boards (54), the base portion end sections (31b-33b) of sloping portion (31c-33c) remains on the position of moving on the Width (Dw) of worm shaft (42) in electric motor units (2) by brush holder (7), and the guiding end sections (31d-33d) of sloping portion (31c-33c) contacts with switch boards (54) phase pressure.
15. electric machine according to claim 1 (1) is characterized in that, gear housing (41) further is provided with:
Receiving unit (51a), described receiving unit (51a) hold worm gear (43) and unlimited towards the other side surface of worm gear (43) therein; And
Cover (52), described cover (52) covers receiving unit (51a).
16. electric machine according to claim 15 (1), it is characterized in that, in the space between a lower surface that the contact base portion part (7f) of brush holder (7) and contact portion (31-33) extend to receiving unit (51a) and the side surface of worm gear (43), lower surface is relative with cover (52).
17. electric machine according to claim 15 (1) is characterized in that, deceleration unit (3) further is provided with:
Output shaft (46), described output shaft (46) rotatably support by gear housing (41), and a part of projection of output shaft (46) exceeds outside the gear housing (41) like this; And
Equipment gear (44), described equipment gear (44) are set between worm gear (43) and the cover (52) and are transferred to output shaft (46) with the rotation with worm gear (43).
18. electric machine according to claim 17 (1) is characterized in that:
Equipment gear (44) is converted to the rotation of worm gear (43) crankmotion of output shaft (46); And
Output shaft (46) is used to start for motor vehicle wiper (W).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004244157 | 2004-08-24 | ||
| JP2004244159 | 2004-08-24 | ||
| JP2004244157 | 2004-08-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1741351A CN1741351A (en) | 2006-03-01 |
| CN100517914C true CN100517914C (en) | 2009-07-22 |
Family
ID=36093613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100897944A Expired - Fee Related CN100517914C (en) | 2004-08-24 | 2005-08-09 | Motor apparatus having rotational position detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100517914C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4710663B2 (en) * | 2006-03-13 | 2011-06-29 | 日新電機株式会社 | Polyphase switch |
| EP2597760B1 (en) * | 2010-09-02 | 2019-07-17 | Mitsuba Corporation | Wiper motor |
| JP5759719B2 (en) * | 2010-12-28 | 2015-08-05 | アスモ株式会社 | Brush motor with reduction gear |
| BR112014010815B1 (en) * | 2011-11-04 | 2019-09-17 | Mitsuba Corporation | ELECTRIC MOTOR APPLIANCE AND ASSEMBLY METHOD |
| JP5959499B2 (en) * | 2013-12-27 | 2016-08-02 | マブチモーター株式会社 | motor |
| JP6503255B2 (en) * | 2015-07-30 | 2019-04-17 | 株式会社ミツバ | Motor device |
| JP7039363B2 (en) * | 2018-03-30 | 2022-03-22 | 日本電産サンキョー株式会社 | motor |
-
2005
- 2005-08-09 CN CNB2005100897944A patent/CN100517914C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1741351A (en) | 2006-03-01 |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20180920 Address after: Aichi Prefecture, Japan Patentee after: DENSO Corp. Address before: Shizuoka Patentee before: ASMO Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090722 |