WO2015004795A1 - モータ装置 - Google Patents
モータ装置 Download PDFInfo
- Publication number
- WO2015004795A1 WO2015004795A1 PCT/JP2013/069116 JP2013069116W WO2015004795A1 WO 2015004795 A1 WO2015004795 A1 WO 2015004795A1 JP 2013069116 W JP2013069116 W JP 2013069116W WO 2015004795 A1 WO2015004795 A1 WO 2015004795A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- brush holder
- case
- motor
- wall
- gear
- Prior art date
Links
- 238000003825 pressing Methods 0.000 claims abstract description 30
- 230000009467 reduction Effects 0.000 abstract description 14
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000003780 insertion Methods 0.000 description 25
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- 230000007246 mechanism Effects 0.000 description 18
- 230000004308 accommodation Effects 0.000 description 15
- 229910000831 Steel Inorganic materials 0.000 description 12
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- 238000005266 casting Methods 0.000 description 3
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- 238000001746 injection moulding Methods 0.000 description 3
- 244000185238 Lophostemon confertus Species 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
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- 230000020169 heat generation Effects 0.000 description 2
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- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/14—Means for supporting or protecting brushes or brush holders
- H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/38—Brush holders
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
- H02K13/006—Structural associations of commutators
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/14—Means for supporting or protecting brushes or brush holders
- H02K5/143—Means for supporting or protecting brushes or brush holders for cooperation with commutators
- H02K5/148—Slidably supported brushes
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/081—Structural association with bearings specially adapted for worm gear drives
Definitions
- the present invention relates to a motor apparatus including a yoke in which a rotating shaft is accommodated, a case in which an output shaft rotated by the rotating shaft is accommodated, and a brush holder accommodated in the case.
- a motor device provided with a motor portion and a gear portion has been used as a drive source of a wiper device mounted on a vehicle such as a car.
- the motor unit includes a rotating shaft that rotates by the supply of drive current, and the gear unit includes a speed reducing mechanism that decelerates the rotation of the rotating shaft, and an output shaft that outputs the rotation of the speed reducing mechanism.
- the gear portion having the speed reduction mechanism by providing the gear portion having the speed reduction mechanism, a large output can be obtained while being small, and the in-vehicle performance is improved.
- the technology indicated, for example in patent documents 1 and 2 is known.
- the motor unit (motor device) described in Patent Document 1 includes a DC motor (motor unit) having a motor output shaft (rotational shaft), a reduction mechanism including a worm and a worm wheel, and an output for outputting the rotation of the reduction mechanism. And a wheel accommodating portion (gear portion) having an axis. Then, in the cited reference 1, the motor fixing portion integrally provided in the housing (case) forming the wheel accommodating portion is fitted to the opening portion of the casing (yoke) forming the DC motor, It uses a connecting structure to fix the screw with and.
- the motor (motor device) described in Patent Document 2 includes a motor unit having a rotating shaft, a reduction mechanism including a worm shaft and a worm wheel, and a reduction unit including an output shaft for outputting the rotation of the reduction mechanism (gear And a brush holder housed in a holder housing portion integrally provided in a gear housing (case) forming the speed reduction portion.
- a base extending in a direction orthogonal to the axial direction of the rotation shaft is integrally provided on the brush holder, and the base is held between the yoke housing (yoke) and the gear housing, It uses a coupling structure that fixes screws under the condition.
- the base of the brush holder is held between the yoke and the case, so that the base and the case between the base and the case, the yoke and the case It is necessary to securely seal (seal) three places between Therefore, it is necessary to improve the forming accuracy of the case, the brush holder and the like, which causes an increase in the manufacturing cost.
- An object of the present invention is to provide a motor device which can simplify the manufacturing process of the motor device as well as to reduce the size and weight of the motor device.
- a motor device comprising a yoke in which a rotation shaft is accommodated, a case in which an output shaft rotated by the rotation shaft is accommodated, and a brush holder accommodated in the case.
- the first yoke inner wall and the second yoke inner wall forming the first case, the first case inner wall and the second case inner wall forming the case, and the yoke on the case side, the first yoke inner wall and the first case
- a press rod portion disposed between the inner wall and the brush holder is provided to extend in the axial direction of the rotary shaft, and is opposed to the inner wall of the second yoke in the radial direction of the rotary shaft, and the case of the yoke Provided in the brush holder so as to extend in the axial direction of the rotating shaft, and from the axial direction of the rotating shaft by the pressing collar portion Pressurized, having an axial positioning projection for positioning in the axial direction with respect to the casing of the brush holder.
- first yoke inner wall and the second yoke inner wall extend from the opening to the bottom of the yoke.
- four magnets are mounted on the first yoke inner wall and the second yoke inner wall.
- a projection that is crushed by the pressing rod is formed on the pressing ridge side of the axial positioning projection.
- the yoke is positioned in the radial direction with respect to the case by the radial positioning convex portion of the brush holder. Further, the axial positioning convex portion of the brush holder is pressed from the axial direction of the rotation shaft by the pressing rod portion, and the brush holder is positioned in the axial direction with respect to the case. Therefore, the yoke and the case do not have to be engaged with each other in a concavo-convex manner, and an increase in the size of the connection portion between the both can be avoided. As a result, the size and weight of the motor device can be reduced. Further, since it is not necessary to interpose the brush holder in the connection portion between the yoke and the case, it is possible to obtain sufficient sealing performance, and consequently, the manufacturing process of the motor device can be simplified.
- FIG. 2 is a partial cross-sectional view taken along the line AA of FIG. It is an enlarged view of the broken-line circle B part of FIG. It is a perspective view showing a stopper plate. It is the figure which looked at the gear case single-piece
- FIG. 2 is a cross-sectional view showing a single gear case taken along the line DD in FIG. 1; It is a top view which shows the detail of a switching plate. It is the perspective view which looked at the connector unit from the gear part side. It is the perspective view which looked at the connector unit from the motor part side. It is the perspective view which looked at the brush holder from the gear part side.
- FIG. 10 is a plan view showing a gear portion of a rear wiper motor according to Embodiment 2.
- FIG. 1 shows a plan view of a rear wiper motor mounted on a vehicle
- FIG. 2 shows a partial sectional view taken along the line AA of FIG. 1
- FIG. 3 shows an enlarged view of a broken circle B in FIG. .
- a rear wiper motor 10 as a motor device is used as a drive source of a rear wiper device (not shown) mounted on a rear hatch of a vehicle, and includes a motor portion 20 and a gear portion 30. .
- the motor unit 20 and the gear unit 30 are integrally connected by a pair of fastening screws 11.
- the rear wiper motor 10 is disposed in a narrow space such as a rear hatch, and makes a wiper blade (not shown) provided on a rear glass (a windshield) (not shown) reciprocate wiping operation (rocking drive) within a predetermined angle range. It has become.
- the motor unit 20 is configured as a 4-pole motor with a brush.
- the motor unit 20 includes a motor case (yoke) 21.
- the motor case 21 is formed in a bottomed cylindrical shape by deep-drawing (pressing) a steel plate that is a magnetic body.
- the motor case 21 includes an opening 21a and a bottom 21b, and a pair of arcs 21c and a pair of straight portions 21d are provided between the opening 21a and the bottom 21b.
- the arc portions 21c and the straight portions 21d are disposed to face each other with the shaft center (armature shaft 24) of the motor case 21 interposed therebetween, whereby the cross section of the motor case 21 is formed in a substantially oval shape. Accordingly, the width dimension of the motor case 21, that is, the thickness dimension in the left-right direction in FIG.
- a first yoke inner wall 21e and a second yoke inner wall 21f are provided inside the arc portion 21c and the linear portion 21d, respectively, and the first yoke inner wall 21e and the second yoke inner wall 21f form the inner side of the motor case 21. doing.
- the respective yoke inner walls 21 e and 21 f extend from the opening 21 a to the bottom 21 b of the motor case 21.
- the motor case 21 can be made straight from the opening 21a to the bottom 21b without a stepped portion, and the formability (ease of pressing) of the motor case 21 is improved. Further, as shown in FIG.
- the motor case 21 is formed in an advantageous shape in terms of the improvement of the formability and the reduction in size and weight.
- a collar 21h having an insertion hole 21g through which each fastening screw 11 is inserted is integrally provided on the opening 21a side (gear case 31 side) of the motor case 21, a collar 21h having an insertion hole 21g through which each fastening screw 11 is inserted is integrally provided.
- the flange portion 21h comes into surface contact with the abutting surface 34g formed in the brush holder accommodating portion 34 of the gear case 31.
- a seal member (not shown) is interposed between the flange portion 21h and the abutting surface 34g, whereby the intrusion of rain water or the like into the rear wiper motor 10 is prevented.
- each pressing collar 21i butts the motor case 21 to the gear case 31 to the gear case 31.
- each yoke inner wall 21e, 21f of the motor case 21 and each case inner wall 34c of the brush holder accommodating portion 34 in the gear case 31. , 34d (see FIG. 5).
- each pressing flange 21i is configured to press the axial positioning convex portion 72e of the brush holder 70 from the axial direction of the armature shaft 24.
- the distance W1 between the respective second yoke inner walls 21f is substantially the same as the distance W2 (see FIG. 5) between the respective second case inner walls 34d of the brush holder accommodating portion 34 (W1 ⁇ W2).
- a total of four magnets 22 each having a substantially arc-shaped cross section are attached to the inside of the motor case 21, that is, the first yoke inner wall 21e and the second yoke inner wall 21f.
- Each magnet 22 is, for example, a ferrite magnet, and is fixed at equal intervals (90 degrees intervals) along the circumferential direction of the motor case 21, and an armature (rotation) is provided inside each magnet 22 via a predetermined gap.
- the child 23 is rotatably accommodated.
- the proximal end side of the armature shaft (rotational axis) 24 is fixed to the center of rotation of the armature 23 so as to pass therethrough.
- a commutator 25 is fixed at a substantially central portion along the axial direction of the armature shaft 24.
- the commutator 25 includes ten segments 25a.
- an armature core 26 forming the armature 23 is fixed, and the armature core 26 is provided with ten teeth and provided with ten slots 26a between the teeth. .
- a plurality of armature coils 26b are wound around each slot 26a in a predetermined winding manner and a predetermined number of turns. The coil end of each armature coil 26b is electrically connected to each segment 25a.
- a plurality of power supply brushes (brushes) 25 b (only one is shown in FIG. 1) is in sliding contact with each segment 25 a of the commutator 25.
- Each feeding brush 25b is movably provided on the brush holder 70 housed in the brush holder housing portion 34 of the gear case 31, and a driving current from the connector unit 50 is supplied to each feeding brush 25b.
- the motor unit 20 and the connector unit 50 are electrically connected via the respective feeding brushes 25b, the commutator 25 and the armature coil 26b, whereby an electromagnetic force is generated in the armature coil 26b, and the armature 23 (armature The shaft 24) is adapted to rotate.
- FIG. 2 in order to make an explanation intelligible, illustration of each electric power feeding brush 25b and the brush holder 70 is abbreviate
- the proximal end side of the armature shaft 24 is rotatably accommodated in the motor case 21 and supported only by the radial bearing 27 provided on the bottom 21 b of the motor case 21. Between the base end side of the armature shaft 24 and the bottom 21 b, no thrust bearing is provided for supporting the armature shaft 24 in the axial direction.
- the radial bearing 27 is formed, for example, in a substantially cylindrical shape by a sintered material, thereby providing low noise, impact resistance and self-lubricity, and further, generation of wear powder is difficult.
- the radial bearing 27 can be formed of a plastic material or the like excellent in heat resistance, instead of the sintered material.
- a worm gear 24a (not shown in detail) is integrally provided on the tip end side of the armature shaft 24, and the worm gear 24a rotates in the gear case 31 as the armature shaft 24 rotates.
- the worm gear 24 a is formed in a spiral shape and is engaged with the gear teeth 32 a of the worm wheel 32.
- the worm gear 24a and the worm wheel 32 constitute a speed reduction mechanism.
- the worm wheel 32 rotates in a decelerated state more than the worm gear 24a with the rotation of the worm gear 24a, and decelerates and outputs a torque-increased rotation to the outside.
- a bearing fixing portion 24b having a concavo-convex shape (serration shape) in the radial direction of the armature shaft 24 is formed.
- the inner ring member 28a of the ball bearing (bearing member) 28 is fixed to the bearing fixing portion 24b by press fitting.
- the ball bearing 28 includes an inner ring member 28a and an outer ring member 28b, and a plurality of steel balls 28c are provided between the inner ring member 28a and the outer ring member 28b. Between the inner ring member 28a and the outer ring member 28b, in addition to the steel balls 28c, there is a pair of annular cover members 28d for preventing the lubricating grease (not shown) applied to the steel balls 28c from leaking to the outside. It is provided.
- the outer ring member 28 b of the ball bearing 28 is sandwiched between the bearing fitting portion 36 of the gear case 31 and the stopper plate 60 mounted on the gear case 31.
- the ball bearing 28 has a function as a radial bearing and a thrust bearing. Therefore, also between the tip end side of the armature shaft 24 and the gear case 31, no thrust bearing is provided for supporting the armature shaft 24 in the axial direction.
- the rear wiper motor 10 is configured as a small and lightweight four-pole motor, the amount of heat generation is larger than, for example, a large two-pole motor having the same output.
- the thrust bearings are not provided on both axial end sides of the armature shaft 24, the sliding loss of the armature shaft 24, that is, the frictional resistance with the thrust bearing is eliminated by that amount, thereby preventing an increase in unnecessary heat generation. I am trying to do it.
- the bearing fitting portion 36 is provided in the vicinity of the connector unit housing portion 35 (see FIG. 1) in the gear case 31, and is formed annularly in the gear case 31.
- the bearing fitting portion 36 opens toward the motor portion 20 (motor case 21) side, and the ball bearing 28 is fitted to the bearing fitting portion 36 from the motor portion 20 side.
- a through hole 37 coaxial with the bearing fitting portion 36 is provided on the opposite side to the motor portion 20 side of the bearing fitting portion 36, and the through hole 37 includes the motor portion 20 and the gear portion 30.
- a stopper plate insertion portion 38 into which the stopper plate 60 is inserted is provided on the motor fitting 20 side of the bearing fitting portion 36 in the gear case 31.
- the stopper plate insertion portion 38 is open toward the gear cover side (the front side in FIG. 3), and the stopper plate insertion portion 38 is from the opening side of the gear case 31 where the gear cover (not shown) is not attached.
- the stopper plate 60 can be inserted.
- FIG. 4 shows a perspective view of the stopper plate.
- the stopper plate 60 is formed in a substantially U-shape by pressing a steel plate, and includes a support main body 61 and a pair of inserted parts 62.
- the support main body portion 61 is formed with a notch portion 61 a for holding the armature shaft 24 (broken line in the drawing) in a non-contact state when mounted to the stopper plate insertion portion 38.
- the pair abuts against the outer ring member 28b of the ball bearing 28 to thereby fix the ball bearing 28 to the bearing fitting portion 36.
- the bearing support convex portion 61b is provided.
- Each of the insertion portions 62 is provided at a position offset from the position of the support main body 61 along the axial direction of the armature shaft 24 by a predetermined amount.
- the stopper plate 60 has a spring property by forming the stopper plate 60 substantially in a step-like shape by a steel plate, thereby elastically pressing the outer ring member 28 b of the ball bearing 28, and the gear case 31 of the ball bearing 28. I try to prevent the rattling in the inside surely.
- each bearing support convex portion 61b is disposed in the upper direction in the drawing from the center position of the ball bearing 28 with respect to the mounting direction (vertical direction in FIG. 4) of the stopper plate 60. As a result, the rattling of the ball bearing 28 in the gear case 31 can be more effectively prevented without being influenced by the variation in the manufacturing accuracy of each component.
- Guide tapers 61c and 62a are provided on the opening side of the notch portion 61a and on the tip end side (lower side in the figure) of the insertion portion 62, and the guide tapers 61c and 62a are connected to the stopper plate insertion portion 38 of the stopper plate 60. It is designed to function as an installation guide for Thereby, the mounting operation of the stopper plate 60 to the gear case 31 is facilitated, and the manufacturing process of the rear wiper motor 10 is simplified.
- the stopper plate 60 axially supports the armature shaft 24 and no thrust bearings are provided on both axial end sides of the armature shaft 24, the shaft of the armature shaft 24 is assembled after the rear wiper motor 10 is assembled. There is no need for position adjustment in the direction. In addition, high precision is not required for setting the clearances of portions of the gear case 31 and the motor case 21 facing both axial end sides of the armature shaft 24. Therefore, the manufacturing process of the rear wiper motor 10 is simplified to significantly reduce the manufacturing cost. It has become possible.
- FIG. 5 is a view of the gear case alone as viewed in the direction of arrow C in FIG. 1
- FIG. 6 is a cross-sectional view showing the gear case alone taken along line DD in FIG.
- the gear portion 30 is provided with a gear case (case) 31 formed in a substantially bathtub shape by casting and forming a molten aluminum material or the like, as shown in FIGS.
- the gear case 31 includes a bottom 31a and a wall 31b, and the side opposite to the bottom 31a is a mounting opening 31c.
- the mounting opening 31 c is closed by a gear cover, and the worm wheel 32, the connector unit 50, and the like are accommodated in the gear case 31 from the mounting opening 31 c.
- a brush holder accommodating portion 34 is integrally provided on the motor unit 20 side of the gear case 31.
- the brush holder housing portion 34 is formed in a tubular shape so as to extend along the axial direction of the armature shaft 24 (see FIG. 1), and the cross sectional shape thereof is the same as the cross sectional shape of the motor case 21 (see FIG. 2) , Is formed in a substantially oval shape.
- the brush holder accommodating portion 34 includes a pair of arc-shaped wall portions 34a and a pair of straight wall portions 34b.
- a first case inner wall 34c and a second case inner wall 34d are provided respectively on the inner side of the arcuate wall 34a and the linear wall 34b, and the case inner walls 34c and 34d form the inside of the brush holder housing 34 ing.
- the first case inner wall 34 c and the second case inner wall 34 d extend along the axial direction of the armature shaft 24.
- the first case inner wall 34c on one side is formed with a recess 34e into which the housing wall 71b of the brush holder 70 and the holder side first ground terminal ET1 (see FIG. 10) enter.
- a stepped portion 34f is formed in which the holder side second ground terminal ET2 (see FIG. 11) of the brush holder 70 is positioned.
- the recess 34 e and the step 34 f are both extended in the axial direction of the armature shaft 24 (the housing direction of the brush holder 70).
- an abutment surface 34g is provided, which is brought into abutment with the flange 21h (see FIG. 2) of the motor case 21 to make surface contact.
- the distance between the first case inner walls 34c on the side of the butting surface 34g of the brush holder housing 34 is set to a distance L2 slightly longer than the distance L1 (see FIG. 2) between the first yoke inner walls 21e (see FIG. 2) L2> L1). Further, the distance between the second case inner walls 34d on the side of the butting surface 34g of the brush holder housing portion 34 is set to be substantially the same distance W2 as the distance W1 (see FIG.
- a total of four positioning protrusions 34 h are integrally provided on the side opposite to the motor unit 20 side along the axial direction of the brush holder housing 34.
- Each positioning projection 34h is disposed at a connecting portion between each arcuate wall portion 34a and each linear wall portion 34b, that is, at each of four corner portions inside the brush holder accommodating portion 34 formed in a substantially oval shape.
- the positioning projections 34 h are arranged to face each other across the axial center of the brush holder housing 34.
- each positioning protrusion 34 h is formed in a substantially triangular shape in cross section along the radial direction of the armature shaft 24, and protrudes toward the inside of the brush holder accommodation portion 34.
- Each positioning protrusion 34 h includes a tip end surface SF ⁇ b> 1 facing in the axial direction of the armature shaft 24 and a pair of outer side surfaces SF ⁇ b> 2 facing in the radial direction of the armature shaft 24.
- Each positioning projection 34h is adapted to be engaged with each positioning recess 71d (see FIG. 10) of the brush holder 70, the tip end surface SF1 abuts on the bottom surface SF3 of the positioning recess 71d, and each outer surface SF2 abuts on the inner side surfaces SF4 of the positioning recess 71d.
- the brush holder 70 can be positioned at the regular position in the brush holder accommodating portion 34 without rattling.
- Each first case inner wall 34c and each second case inner wall 34d are inclined at a minute angle with respect to an axis (not shown) of the armature shaft 24 extending in the left and right direction in FIG.
- This inclination is a draft slope PS1 for smoothly extracting a mold (not shown) used when casting and forming the gear case 31.
- the distance between the second case inner walls 34d is set to W3 on each positioning projection 34h side, and is set to W2 slightly longer than W3 on the abutment surface 34g side. (W2> W3).
- the draft slope PS1 of the brush holder housing portion 34 is set to "about 2.0 °".
- the distance between the first case inner walls 34c is also set to have the same magnitude relationship as the distance between the second case inner walls 34d.
- the draft angle PS1 of the brush holder housing portion 34 is set to “about 2.0 °” over the entire circumference of the brush holder housing portion 34.
- a connector unit accommodating portion 35 for accommodating the connector unit 50 is integrally formed adjacent to the brush holder accommodating portion 34.
- the connector unit housing portion 35 includes motor side wall portions 35 a located on the side of the positioning projections 34 h of the brush holder housing portion 34.
- a stopper plate insertion portion 38 is formed on the side opposite to the motor portion 20 side along the axial direction of the armature shaft 24, and the gear portion side wall portion 35b is extended from the bottom portion 31a to the mounting opening 31c. ing.
- the connector main body 51 (see FIGS. 8 and 9) of the connector unit 50 is accommodated between the motor side wall 35a and the gear side wall 35b.
- the motor side wall 35a and the gear side wall 35b are inclined at a minute angle with respect to a line segment (not shown) extending in a direction (vertical direction in FIG. 6) orthogonal to the axis of the armature shaft 24. ing.
- This inclination is a draft PS2 for smoothly extracting a mold (not shown) used in casting and forming the gear case 31.
- the distance between the wall portions 35a and 35b is set to T1 on the bottom 31a side and T2 slightly longer than T1 on the mounting opening 31c side (see FIG. 6). T2> T1).
- the draft slope PS2 of the connector unit housing portion 35 is set to "about 1.5 °".
- a recess 35c which is recessed in the radial direction of the armature shaft 24 is provided between the motor side wall 35a and the gear side wall 35b and between the positioning projections 34h.
- Each insertion convex part 51e (refer FIG.8, 9) of the connector unit 50 entraps into the hollow part 35c in the state which accommodated the connector unit 50 in the connector unit accommodating part 35.
- the connector unit 50 is positioned at the regular position of the connector unit housing portion 35 by positioning so that the insertion convex portion 51e is engaged with the recessed portion 35c. It can be positioned accurately on the
- the connector unit housing portion 35 includes a connector support portion 35 d that supports the connector connection portion 52 of the connector unit 50.
- the connector support portion 35d is formed in a bottomed box shape having an opening on the same side as the opening side of the mounting opening 31c.
- the connector support portion 35 d includes a bottom wall 35 e and a side wall 35 f, and the bottom wall 35 e is configured to support the bottom wall 52 e of the connector connection portion 52.
- the side wall portion 35f (right side in FIG. 1) supports the support projection 52g and the like (see FIG. 9) provided on the side wall portion 52d of the connector connection portion 52.
- FIG. 7 shows a plan view showing details of the switching plate.
- a worm wheel 32 is rotatably provided in the gear case 31, and the worm wheel 32 is formed in a substantially disc shape by injection molding of a resin material such as plastic.
- Gear teeth 32a are integrally provided on an outer peripheral portion of the worm wheel 32, and a worm gear 24a is engaged with the gear teeth 32a.
- One axial end of a wheel shaft 32b made of a steel rod having a circular cross section is fixed to the rotation center of the worm wheel 32, and the other axial end of the wheel shaft 32b is provided to the bottom 31a of the gear case 31. It is rotatably supported by the boss 31d (see FIGS. 5 and 6).
- a switching plate 32c made of a conductive steel plate is mounted on the bottom 31a side of the worm wheel 32, as shown by the hatched portion in FIG. 7, a switching plate 32c made of a conductive steel plate is mounted.
- the switching plate 32c is formed in a substantially annular shape, and includes a recess 32d that is recessed inward in the radial direction of the switching plate 32c, and a protrusion 32e that protrudes inward in the radial direction.
- the tip end sides of two contact plates CP1 and CP2 provided on the connector unit 50 come into sliding contact with the switching plate 32c as the worm wheel 32 rotates.
- the switching plate 32c having the concave portion 32d and the convex portion 32e is attached to the worm wheel 32, and the contact plates CP1 and CP2 are provided to slide on the switching plate 32c.
- a short circuit state (energized state) or a non-energized state is sent to an on-vehicle controller (not shown).
- the on-vehicle controller can grasp the rotational state of the worm wheel 32, that is, the swing position of the wiper blade, and stop the wiper blade at a predetermined stop position.
- an output shaft 33 made of a steel rod having a circular cross section is accommodated in a portion (left side in the drawing) of the gear case 31 away from the worm wheel 32.
- the output shaft 33 is rotatably supported by a boss 31 e (see FIGS. 5 and 6) provided on the bottom 31 a of the gear case 31.
- the base end side of the output shaft 33 is provided in the gear case 31, and the tip end side (the back side in FIG. 1) of the output shaft 33 is extended to the outside of the gear case 31.
- the proximal end of the wiper blade is attached (fixed) to an extended portion (not shown) extended to the outside of the output shaft 33.
- a motion conversion mechanism 40 for converting the rotational motion of the worm wheel 32 into the swinging motion of the output shaft 33.
- the motion conversion mechanism 40 includes a swing link 41, a connection plate 42 and a sliding contact plate 43.
- the swing link 41 is formed in a plate shape by punching a steel plate or the like, and one longitudinal end side of the swing link 41 is fixed to the proximal end side of the output shaft 33.
- the other end side in the longitudinal direction of the swing link 41 is rotatably connected to one end side in the longitudinal direction of the connection plate 42 via the first connection pin P1.
- the other end side in the longitudinal direction of the connection plate 42 is rotatably connected at a position eccentric to the rotation center of the worm wheel 32 via a second connection pin P2.
- the length dimension of the swing link 41 is set to a length dimension of approximately half (approximately 1 ⁇ 2) with respect to the length dimension of the connecting plate 42.
- the connection plate 42 is also formed into a plate shape by punching a steel plate in the same manner as the swing link 41.
- the output shaft 33 can be swung within a predetermined angular range as the worm wheel 32 rotates in one direction.
- the output shaft 33 is adapted to rotate as the armature shaft 24 rotates.
- the rotational force that has been decelerated and increased in torque is transmitted to the second connection pin P2, and the second connection pin P2 rotates about the wheel shaft 32b.
- the other longitudinal end of the connecting plate 42 is also rotated about the wheel shaft 32b, whereby the longitudinal one end of the connecting plate 42 is restricted by the swing link 41 via the first connecting pin P1. , Swing around the output shaft 33.
- the sliding contact plate 43 is formed in a plate shape from a resin material such as plastic excellent in self-lubricity, and is mounted on the gear cover side (the front side in FIG. 1) of the connection plate 42.
- a sliding contact portion 43a in sliding contact with the gear cover is integrally provided at a central portion in the longitudinal direction of the sliding contact plate 43, and grease (not shown) is applied to the sliding contact portion 43a.
- FIG. 8 is a perspective view of the connector unit as viewed from the gear portion side
- FIG. 9 is a perspective view of the connector unit as viewed from the motor portion side.
- the connector unit 50 is formed in a predetermined shape by injection molding of a resin material such as plastic, and is formed in a box shape with a connector main body 51 formed in a plate shape and a bottom. And the connector connector 52.
- the cross-sectional shape of the connector body 51 along the short direction is tapered toward the housing direction (lower side in FIGS. 8 and 9) with respect to the connector unit housing 35 (see FIG. 6) of the connector unit 50. .
- the plate thickness dimension of the storage direction front end side (the lower side in FIGS. 8 and 9) along the short side direction of the connector main body 51 is T1
- the storage along the short side direction of the connector main body 51 is set to a plate thickness dimension T2 slightly thicker than the plate thickness dimension T1 at the front end side in the accommodation direction (T2> T1).
- the front surface 51a and the back surface 51b of the connector main body 51 are respectively made with respect to the axial direction of the armature shaft 24. It is an inclined surface inclined by "about 1.5 °". Therefore, when housing connector body 50 in connector unit housing 35 (see FIG. 6), connector main body 51 is guided by wall portions 35a and 35b while front surface 51a is on the back surface of gear portion side wall portion 35b. The surface 51b is in contact with the motor side wall 35a by surface contact so as to be in close contact with each other. That is, even in the case of the assembly work by the hand of the operator, the connector unit 50 can be easily accommodated in the connector unit accommodation portion 35, and the connector unit 50 can be accurately positioned at the regular position of the connector unit accommodation portion 35. It has become.
- a through cylinder portion 51c through which the armature shaft 24 (see FIG. 1) penetrates is formed.
- the inner diameter of the through cylinder 51c is set to be slightly larger than the outer diameter of the ball bearing 28 (see FIG. 3).
- the height dimension H along the axial direction of the through cylinder portion 51c is set to be larger than the plate thickness dimensions T1 and T2 of the connector main portion 51 (H> T2> T1).
- the surface 51 a side (left side in FIG. 3) of the through cylinder 51 c enters inside the formation wall 38 a forming the stopper plate insertion portion 38. That is, the position of the tip end surface TS of the through cylinder portion 51c is disposed on the inner side of the stopper plate insertion portion 38 than the position of the inlet surface OS of the formation wall portion 38a.
- a contact plate support 51d is integrally provided on the side of the through cylinder 51c opposite to the connector connection 52, and the contact plate support 51d extends from the surface 51a of the connector body 51 in the axial direction of the armature shaft 24. Projected into Two contact plates CP1 and CP2 are attached to the contact plate support portion 51d, and each of the contact plates CP1 and CP2 is viewed from one side (the lower direction in FIGS. 8 and 9) of the connector body 51 respectively. It is inserted and fixed.
- An earth terminal ET is integrally provided on the back surface 51b side of the contact plate CP2 as shown in FIG.
- the ground terminal ET is electrically connected to the motor side wall 35a (see FIG. 6) of the gear case 31 in a state where the rear wiper motor 10 is assembled.
- a pair of female terminals TM2 through which a drive current from an external connector flows is provided on the connector connection portion 52 side of the through cylinder portion 51c.
- the proximal end (see FIG. 9) of each male terminal TM1 whose distal end is exposed in the connector connection portion 52 is electrically connected to the proximal end of each female terminal TM2 by spot welding or the like.
- Each brush holder side male terminal TM3 (see FIG. 10) provided on the brush holder 70 is inserted into the tip end of each female terminal TM2 when the rear wiper motor 10 is assembled.
- each brush holder side male type terminal TM3 is inserted from the back surface 51b side of the connector main portion 51 to each female type terminal TM2 so as to be electrically connected. Further, each brush holder side male terminal TM3 of the brush holder 70 is connected to each female terminal TM2 from a direction orthogonal to the connection direction of the external connector to the connector connection portion 52. As a result, when the external connector is connected to the connector connection portion 52, the electrical connection between each brush holder side male terminal TM3 and each female terminal TM2 is prevented from being loosened.
- each jumper wire JP is electrically connected to each male type terminal TM1 and each female type terminal TM2 by spot welding etc., and the other end side of each jumper wire JP is spot welded to each contact plate CP1, CP2 And so on.
- each insertion convex portion 51e is projected in the direction of accommodation in the gear case 31, and can be inserted between the positioning projections 34h provided on the bottom portion 31a side of the gear case 31 (see FIG. 5) without any gap. Thereby, each insertion convex part 51e engages with the hollow part 35c without rattling.
- a tapered portion 51 f is provided on the leading end side in the housing direction of each insertion convex portion 51 e and on each positioning projection 34 h side.
- Each tapered portion 51 f guides the engaging operation of each insertion convex portion 51 e to the recessed portion 35 c, and when housing the connector unit 50 in the connector unit housing portion 35, the tapered portion 51 f is on the bottom 31 a side of the gear case 31.
- the positioning projections 34h to be disposed are in sliding contact with the positioning projections 34h.
- the taper portion may be provided not only on each insertion convex portion 51e as described above, but also on each insertion convex portion 51e and each positioning projection 34h, or may be provided only on each positioning projection 34h good.
- the connector side connection guide hole adjacent to the through cylinder portion 51c on the side of the contact plate supporting portion 51d of the through cylinder portion 51c of the connector body 51 and on the rear side of the housing direction along the short direction of the connector body 51 51g is provided.
- the connector side connection guide hole 51g is disposed at a position offset from the axial center of the through cylinder 51c.
- the connector side connection guide hole 51g is provided to penetrate along the thickness direction of the connector main body 51, and the cross section of the connector side connection guide hole 51g has a substantially square shape with corner portions chamfered in an arc shape. It is formed.
- the holder side connection guide projection 71c (see FIG. 10) of the brush holder 70 is inserted into the connector side connection guide hole 51g, whereby the brush holder for the brush holder accommodation portion 34 It is designed to prevent 70 mis-assembly.
- the incorrect attachment of the brush holder 70 means that the brush holder 70 is attached to the brush holder accommodating portion 34 in a state of being vertically inverted, for example.
- the connector connection portion 52 includes a connection portion main body 52a, and a pressing cap 52b for fixing each male terminal TM1 to the connection portion main body 52a.
- the connection portion main body 52a is provided with a connection opening 52c to which an external connector is connected and a side wall 52d.
- a bottom wall 52e is provided on the pressing cap 52b located on the opposite side to the connection opening 52c. That is, the connection opening 52c and the bottom wall 52e are disposed opposite to each other along the connection direction of the external connector (vertical direction in FIGS. 8 and 9), and the bottom wall 52e supports the connector via the respective support protrusions 52f. It is supported by the bottom wall 35e (see FIG. 1) of the portion 35d.
- the side wall 52d is supported by the side wall 35f (see FIG. 1) of the connector support 35d via the support protrusions 52g.
- the pressing cap 52b is also provided with a pair of support protrusions 52h that abut on the side wall portion 35f of the connector support portion 35d.
- each male terminal TM1 is exposed inside the connection portion main body 52a, whereby a plurality of female terminals (on the external connector side) are provided on the distal end side of each male terminal TM1. (Not shown) are electrically connected.
- each brush holder of the brush holder 70 with respect to each female terminal TM2 from the motor unit 20 side (see FIG. 9) of the connector unit 50.
- Side male terminal TM3 (see FIG. 10) is electrically connected to the switching plate 32c (see FIG. 7) on the gear portion 30 side (see FIG. 8) of the connector unit 50. The tip side is in contact.
- FIG. 10 is a perspective view of the brush holder as viewed from the gear portion side
- FIG. 11 is a perspective view of the brush holder as viewed from the motor portion side.
- the brush holder 70 is formed in a predetermined shape by injection molding of a resin material such as plastic, and is formed in a substantially oval shape so that it can be mounted inside the brush holder accommodating portion 34.
- a unit 71 is provided.
- An outer peripheral wall portion 72 extending in the axial direction of the armature shaft 24 is integrally provided on an outer peripheral portion of the base portion 71.
- the outer peripheral wall 72 includes a pair of flat walls 72 a substantially flat in the circumferential direction of the base 71 and a pair of curved walls 72 b substantially curved in the circumferential direction of the base 71. Have.
- the flat wall portions 72 a and the curved wall portions 72 b are disposed to face each other with the base portion 71 as a center.
- the outer peripheral wall 72 of the brush holder 70 is tapered toward the housing direction (left side in FIGS. 10 and 11) of the brush holder 70 with respect to the brush holder housing 34.
- the distance between the flat wall portions 72a is W3 at the front end side (the left side in FIGS. 10 and 11) of the brush holder 70 in the housing direction, and the rear direction side in the housing direction of the brush holder 70 (FIG. 10) , 11, the right side) has W2 slightly larger than W3 (W2> W3).
- the distance between the curved wall portions 72b is also in the same size relationship as the distance between the flat wall portions 72a, whereby the brush holder 70 has a tapered shape in the housing direction.
- each flat wall portion 72 a and each curved wall portion 72 b are formed in the radial direction of the armature shaft 24 by tapering the brush holder 70 in the accommodation direction. It is an inclined surface inclined by about 2.0 °. Therefore, the brush holder 70 is guided by the respective first case inner walls 34c and the respective second case inner walls 34d (see FIG. 5) when housed in the brush holder housing portion 34, and the respective curved wall portions 72b correspond to the respective first cases.
- the flat wall portions 72a are in surface contact with the second case inner walls 34d on the inner wall 34c so as to be in close contact with each other.
- the brush holder 70 can be easily accommodated in the brush holder accommodating portion 34, and the brush holder 70 can be accurately positioned at the regular position of the brush holder accommodating portion 34. It has become.
- a through hole 71a is formed through which the armature shaft 24 (see FIG. 1) passes.
- the inner diameter of the through hole 71a is set to be slightly larger than the outer diameter of the ball bearing 28 (see FIG. 3), whereby the armature provided with the ball bearing 28 is assembled when the rear wiper motor 10 is assembled.
- the shaft 24 can pass through the base portion 71.
- a housing wall 71b for housing the varistor VS as an electric component is integrally provided on the connector unit 50 side of the base 71 and near the curved wall 72b from the through hole 71a.
- the accommodation wall 71b is protruded to the outer side than the curved wall 72b, whereby the accommodation wall 71b is one first case inner wall 34c when the brush holder 70 is accommodated in the brush holder accommodation 34. It is fitted into and engaged with a recess 34e (see the right side in FIG. 5) formed in the.
- a holder-side connection guide protrusion 71c is integrally formed on the connector unit 50 side of the base portion 71 and closer to the other curved wall portion 72b from the through hole 71a and further upward in FIG. 10 with respect to the axial center of the through hole 71a. It is provided.
- the holder side connection guide protrusion 71c is disposed at a position offset from the axial center of the through hole 71a.
- the holder-side connection guide protrusion 71c is tapered toward the connector unit 50.
- the cross-sectional shape of the holder-side connection guide protrusion 71c is arc-shaped at the corner portion like the connector-side connection guide hole 51g (see FIG. 9) It is formed in the substantially rectangular shape chamfered to.
- the holder side connection guide protrusion 71c enters the connector side connection guide hole 51g, and finally, the root of the holder side connection guide protrusion 71c Is fitted in the connector side connection guide hole 51g. Therefore, the brush holder of the brush holder 70 is inserted until the tip of the holder side connection guide protrusion 71c enters the connector side connection guide hole 51g and the root of the holder side connection guide protrusion 71c is fitted to the connector side connection guide hole 51g. The insertion movement in the mounting direction to the housing portion 34 is guided. Thereby, the attachment property to the brush holder accommodating part 34 of the brush holder 70 can further be improved.
- the holder side connection guide protrusion 71c and the connector side connection guide are directed in the housing direction of the brush holder 70.
- the holes 51 g do not face each other, so the brush holder 70 can not be accommodated in the brush holder accommodating portion 34. In this manner, erroneous assembly of the brush holder 70 is prevented.
- the protrusion amount S1 of the holder side connection guide protrusion 71c from the base portion 71 is larger than the protrusion amount S2 of the brush holder side male terminal TM3 from the base portion 71 (S1> S2).
- a total of four positioning depressions 71d are integrally formed on the facing surface 71i facing the gear case 31 on the connector unit 50 side of the base 71, that is, on the tip side along the housing direction of the brush holder 70 in the brush holder housing 34. It is provided.
- the positioning depressions 71d are arranged opposite to each other across the axis (the through hole 71a) of the opposing surface 71i, and each corner of the base 71, that is, each flat wall 72a forming the outer peripheral wall 72 and each curved wall 72b Are located at each connection part of the.
- the positioning projections of the positioning hollow 71 d and the brush holder housing 34 34 h are opposed in the housing direction of the brush holder 70.
- the positioning recess portion 71d as well as the positioning protrusion 34h four may not be provided, and at least two may be provided so as to face each other across the axial center of the opposing surface 71i.
- Each positioning recess 71 d is formed of a bottom surface SF3 facing in the axial direction of the armature shaft 24 and a pair of inner side surfaces SF4 facing in the radial direction of the armature shaft 24.
- the bottom surface SF3 is formed by a part of the opposing surface 71i of the base portion 71, and each of the inner side surfaces SF4 is formed by a projecting wall 71e formed in a substantially L shape projecting from the opposing surface 71i to the connector unit 50 side.
- the positioning projections 34h are respectively inserted into the positioning depressions 71d and engaged with each other.
- the bottom surface SF3 abuts on the end surface SF1 and the inner surface SF4 abuts on the outer surfaces SF2 so that backlash of the brush holder 70 with the gear case 31 is suppressed.
- guide tapers 71f are respectively provided on the tip end sides of the projecting walls 71e forming the positioning depressions 71d.
- Each guide taper 71 f guides the engaging operation of each positioning projection 34 h to each positioning recess 71 d.
- the guide taper may be provided not only on the tip side of each projecting wall 71e, but also on both the tip side of each projecting wall 71e and the tip side (tip surface SF1 side) of each positioning projection 34h. You may provide only in the front end side of each positioning protrusion 34h.
- a pair of brush holder side male terminals TM3 are provided adjacent to the varistor VS on the accommodation wall 71b side of the base 71.
- Each brush holder side male terminal TM3 penetrates the base portion 71 in the axial direction of the armature shaft 24, and is inserted into and fixed to the base portion 71.
- the distal end side of each brush holder side male terminal TM3 is disposed on the connector unit 50 side of the base portion 71 as shown in FIG. 10, and the proximal end side of each brush holder side male terminal TM3 is as shown in FIG.
- the varistor VS and one side of a pair of choke coils CC as electrical components are electrically connected to the connector unit 50 side of each brush holder side male terminal TM3.
- One choke coil CC is provided on the base portion 71, and the other choke coil CC is provided on the flat wall portion 72a so as to lie, and each choke coil CC does not cross the through hole 71a.
- a pair of capacitors CD as an electrical component are electrically connected to the motor unit 20 side of each brush holder side male type terminal TM3, and each brush holder side male type is connected to each capacitor CD
- the holder side first ground terminal ET1 is also electrically connected.
- the holder side first ground terminal ET1 is housed in the brush holder housing portion 34 of the brush holder 70, it enters into the concave portion 34e (see the right side in FIG. 5) formed in one first case inner wall 34c. , And is electrically connected to the brush holder accommodating portion 34.
- a pair of power supply brushes 25b and a circuit breaker CB as an electrical component are disposed on the motor section 20 side of the base section 71 and near the other curved wall section 72b from the through hole 71a.
- Each feeding brush 25b is movably held by a pair of brush boxes 71g integrally provided to the base portion 71, and the circuit breaker CB is a holding claw 71h integrally provided between the brush boxes 71g of the base portion 71. Is held by
- the other side of one choke coil CC is electrically connected to one feeding brush 25b via the circuit breaker CB, and the other side of the other choke coil CC is the other feeding It is electrically connected to the brush 25b.
- a holder side second ground terminal ET2 is also electrically connected to the circuit breaker CB, and the holder side second ground terminal ET2 is a brush holder in a state in which the brush holder 70 is housed in the brush holder housing portion 34. It is electrically connected to the step 34f while being engaged with and positioned by the step 34f (see FIG. 5) of the housing 34.
- drive current from the external connector is supplied from each brush holder side male type terminal TM3 to each power supply brush 25b.
- a radial positioning projection 72c is integrally provided on each flat wall 72a so as to extend in the axial direction of the armature shaft 24.
- Each radial positioning convex portion 72c is projected on the opposite side to the protrusion direction of the holder side connection guide protrusion 71c (see FIG. 10), that is, toward the motor portion 20 side, and the opening 21a of the motor case 21 (see FIG. 2) ) Into the interior of the motor case 21.
- each radial direction positioning convex part 72c performs positioning with respect to the gear case 31 of motor case 21 with respect to the radial direction.
- each radial positioning convex portion 72c is opposed to each second yoke inner wall 21f (see FIG. 2) inside each linear portion 21d from the radial direction of the armature shaft 24, and each second yoke inner wall 21f It comes in contact with the As described above, the motor case 21 is accurately positioned in the radial direction with respect to the gear case 31 via the brush holder 70 fixed to the gear case 31 with high accuracy.
- each radial positioning convex portion 72c is a length that protrudes a predetermined amount (for example, 10 mm) from the brush holder accommodating portion 34 to the motor case 21 side in a state where the brush holder 70 is accommodated in the brush holder accommodating portion 34. Is set (see FIGS. 12 and 13). Further, tapered surfaces 72d are respectively formed on the tip end portions of the respective radial direction positioning convex portions 72c, whereby the motor case 21 can be easily attached to the gear case 31.
- a predetermined amount for example, 10 mm
- each axial positioning convex portion 72e is integrally provided so as to extend in the axial direction of the armature shaft 24.
- Each axial positioning convex portion 72e is projected to the opposite side to the side (see FIG. 10) on which each positioning recess 71d is provided (ie, toward the motor portion 20 side), and a total of 4 corresponding to each positioning recess 71d.
- the axial positioning projections 72e are also arranged at the connection portions of the four corners of the base 71, that is, the flat walls 72a and the curved walls 72b forming the outer peripheral wall 72.
- Each axial positioning convex portion 72e is pressed from the axial direction of the armature shaft 24 by each pressing flange portion 21i (see the shaded portion in FIG. 2) of the motor case 21 when the motor case 21 is attached to the gear case 31. It has become so. Thereby, each axial direction positioning convex part 72e performs positioning with respect to the gear case 31 of the brush holder 70 to the axial direction.
- the end portions of the axial positioning projections 72 e that is, the pressing ridges 21 i of the axial positioning projections 72 e are crushed by the pressing ridges 21 i
- a plurality of minute projections (projections) 72f are formed.
- Each of the microprotrusions 72f slightly protrudes toward the pressing ridges 21i and has a tapered shape so as to be easily crushed by the pressing ridges 21i.
- each axial positioning convex portion 72e is set to a length that substantially enters the inside of the brush holder accommodating portion 34 when the brush holder 70 is accommodated in the brush holder accommodating portion 34 (FIG. 12). , 13).
- each minute projection 72 f is protruded from the brush holder accommodation portion 34 to the motor case 21 side.
- the minute projections 72f are crushed by the pressing flange portions 21i. Therefore, rattling of the brush holder 70 is suppressed more reliably, and the brush holder 70 is positioned at the regular position in the brush holder accommodating portion 34.
- FIG. 12 is a perspective view showing a connecting procedure of the gear case and the motor case
- FIG. 13 is a schematic view showing a connecting portion of the gear case and the motor case.
- the description of the power supply brush 25 b and the like mounted on the brush holder 70 is omitted, and the brush holder 70 is simplified.
- the gear case 31 in which the brush holder 70 is accommodated in the brush holder accommodation portion 34 is prepared, and the motor case 21 in which the armature 23 is accommodated is prepared.
- the motor unit 20 is made to face the gear unit 30.
- the portion of the armature shaft 24 to which the largest diameter ball bearing 28 (see FIG. 3) is attached is the through hole 71a (see FIG. 10) of the brush holder 70 and the through cylindrical portion 51c of the connector unit 50 (see FIG. 8) do not touch it.
- the flange portion 21h of the motor case 21 is abutted against the abutting surface 34g of the brush holder accommodating portion 34.
- each fastening screw 11 is screwed into each female screw portion 34i of the gear case 31 with a predetermined tightening torque while inserting each fastening screw 11 into each insertion hole 21g of the flange portion 21h.
- the minute projections 72f are crushed by the pressing flanges 21i, and the brush holder 70 is accommodated in the brush holder accommodating portion 34 without rattling, and the connection between the gear portion 30 and the motor portion 20 is completed.
- a seal member is interposed between the flange portion 21 h and the abutting surface 34 g.
- the motor case 21 is a gear case by the radial positioning convex portion 72 c of the brush holder 70. Positioned radially with respect to 31. Further, the axial positioning convex portion 72 e of the brush holder 70 is pressed from the axial direction of the armature shaft 24 by the pressing flange portion 21 i, and the brush holder 70 is positioned in the axial direction with respect to the gear case 31.
- the motor case 21 and the gear case 31 do not have to be engaged with each other in a concavo-convex manner, and the enlargement of the connection portion between the both can be avoided. Further, since it is not necessary to interpose the brush holder 70 in the connection portion between the motor case 21 and the gear case 31, sufficient sealing performance can be obtained, and consequently, the manufacturing process of the rear wiper motor 10 can be simplified.
- FIG. 14 is a plan view showing the gear portion of the rear wiper motor according to the second embodiment.
- the rear wiper motor (motor device) 80 according to the second embodiment is different from the rear wiper motor 10 (see FIG. 1) according to the first embodiment in the position and motion conversion mechanism of the output shaft 33.
- the structure of 90 is different.
- the output shaft 33 of the rear wiper motor 80 is disposed on the opposite side to the armature shaft 24 side across the worm wheel 32 of the gear case (case) 81.
- the dimension along the axial direction of the armature shaft 24 can be reduced as compared with the first embodiment.
- the motion conversion mechanism 90 of the rear wiper motor 80 includes a pinion gear 91, a motion conversion member 92, a connection plate 42, and a sliding contact plate 43.
- the pinion gear 91 is fixed to the proximal end side of the output shaft 33 and is configured to swing along with the output shaft 33.
- the motion conversion member 92 includes a sector gear 92a meshing with the pinion gear 91, and an arm 92b rotatably coupled to the eccentric position of the worm wheel 32 via the second connection pin P2.
- a first connection pin P1 is provided at a central portion of the sector gear 92a, and a connection plate 42 is provided between the first connection pin P1 and the output shaft 33.
- one longitudinal end of the connecting plate 42 is rotatably connected to the proximal end of the output shaft 33, and the other longitudinal end of the connecting plate 42 is rotatably connected to the first connecting pin P1. It is done.
- the connecting plate 42 according to the second embodiment keeps the distance between the output shaft 33 and the first connecting pin P1 constant and maintains the meshing between the pinion gear 91 and the sector gear 92a.
- the rotational motion of the worm wheel 32 is converted to the swinging motion of the output shaft 33.
- the arm 92b of the motion conversion member 92 also rotates about the wheel shaft 32b.
- the sector gear 92a pivots about the first connection pin P1
- the pinion gear 91 meshing with the sector gear 92a, that is, the output shaft 33 pivots.
- the present invention is not limited to the above embodiments, and it goes without saying that various changes can be made without departing from the scope of the invention.
- the cross-sectional shapes of the motor case 21 and the brush holder housing portion 34 are each formed in a substantially oval shape, but the present invention is not limited to this. It can also be formed into a shape or a rectangular shape. The point is that any shape may be used as long as the radial positioning convex portion 72c can be inserted into the motor case 21 and the pressing flange portion is formed on the motor case 21 side.
- the brush holder 70 is provided with the positioning recess 71 d and the gear case 31 is provided with the positioning projection 34 h.
- the present invention is not limited to this. Also good. That is, the positioning holder may be provided on the brush holder 70, and the positioning recess may be provided on the gear case 31.
- the connector unit 50 is provided with the insertion convex portions 51e, and the gear case 31 is provided with the recessed portion 35c.
- the present invention is not limited to this, and the concavo-convex relationship is reversed. It is good. That is, the recess may be provided in the connector unit 50 and the insertion convex may be provided in the gear case 31.
- the connector main body 51 of the connector unit 50 and the connector connection portion 52 are integrally provided such that the connection direction of the brush holder 70 and the connection direction of the external connector are orthogonal (90 degrees).
- the present invention is not limited to this, and may cross at, for example, 60 degrees according to the shape (wide or narrow) of the mounting space on which the rear wiper motor 10 is mounted.
- the reduction gear mechanism including the worm gear 24a and the worm wheel 32 is adopted.
- the present invention is not limited thereto, and, for example, a planetary gear reduction gear as a reduction gear mechanism.
- the sun gear may be a gear on the input side (the armature shaft 24 side), and the ring gear may be a gear on the output side (the output shaft 33 side).
- a ferrite magnet is used as each magnet 22.
- the present invention is not limited to this, and a plate-like magnet made of a neodymium magnet or the like can be adopted.
- the number of magnets, the number of segments, the number of slots, etc. may be freely set according to the specifications required for the motor unit.
- the microprotrusions 72f are provided at the tip end portions of the axial positioning projections 72e.
- the minute projections 72f are shown to be tapered, but the present invention is not limited to this, and the minute projections 72f may be formed in a thin plate or the like extending toward the motor case 21. Also good. The point is that the shape is not limited as long as the rigidity is crushed by the pressing flange 21i of the motor case 21.
- the present invention is not limited to this, and a power window device mounted on a vehicle such as an automobile, an electric sun roof device, an electric motor
- a power window device mounted on a vehicle such as an automobile, an electric sun roof device, an electric motor
- the present invention can also be applied to a motor device used as a drive source of a seat device or the like.
- the motor device is used to drive a wiper member forming a wiper device mounted on a vehicle such as a car and wipe the window glass.
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Abstract
Description
Claims (4)
- 回転軸が収容されるヨーク、前記回転軸により回転される出力軸が収容されるケース、前記ケース内に収容されるブラシホルダを備えたモータ装置であって、
前記ヨークを形成する第1ヨーク内壁および第2ヨーク内壁と、
前記ケースを形成する第1ケース内壁および第2ケース内壁と、
前記ヨークの前記ケース側に設けられ、前記第1ヨーク内壁と前記第1ケース内壁との間に配置される押圧鍔部と、
前記回転軸の軸方向に延びるよう前記ブラシホルダに設けられ、前記第2ヨーク内壁と前記回転軸の径方向から対向し、前記ヨークの前記ケースに対する径方向への位置決めを行う径方向位置決め凸部と、
前記回転軸の軸方向に延びるよう前記ブラシホルダに設けられ、前記押圧鍔部により前記回転軸の軸方向から押圧され、前記ブラシホルダの前記ケースに対する軸方向への位置決めを行う軸方向位置決め凸部と、
を有する、モータ装置。 - 請求項1記載のモータ装置において、
前記第1ヨーク内壁および前記第2ヨーク内壁は、前記ヨークの開口部から底部に亘って延在される、モータ装置。 - 請求項1記載のモータ装置において、
前記第1ヨーク内壁および前記第2ヨーク内壁には、4つのマグネットが装着される、モータ装置。 - 請求項1記載のモータ装置において、
前記軸方向位置決め凸部の前記押圧鍔部側に、当該押圧鍔部により押し潰される突起部が形成される、モータ装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2013/069116 WO2015004795A1 (ja) | 2013-07-12 | 2013-07-12 | モータ装置 |
CN201380078123.0A CN105379075A (zh) | 2013-07-12 | 2013-07-12 | 电动机装置 |
JP2015526113A JPWO2015004795A1 (ja) | 2013-07-12 | 2013-07-12 | モータ装置 |
US14/903,387 US20160156243A1 (en) | 2013-07-12 | 2013-07-12 | Motor apparatus |
EP13889080.1A EP3021462A4 (en) | 2013-07-12 | 2013-07-12 | Motor device |
Applications Claiming Priority (1)
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PCT/JP2013/069116 WO2015004795A1 (ja) | 2013-07-12 | 2013-07-12 | モータ装置 |
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WO2015004795A1 true WO2015004795A1 (ja) | 2015-01-15 |
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PCT/JP2013/069116 WO2015004795A1 (ja) | 2013-07-12 | 2013-07-12 | モータ装置 |
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US (1) | US20160156243A1 (ja) |
EP (1) | EP3021462A4 (ja) |
JP (1) | JPWO2015004795A1 (ja) |
CN (1) | CN105379075A (ja) |
WO (1) | WO2015004795A1 (ja) |
Cited By (4)
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FR3050969A1 (fr) * | 2016-05-09 | 2017-11-10 | Valeo Systemes Dessuyage | Arbre de rotation et groupe motoreducteur equipe d'un tel arbre pour un systeme d'essuyage d'un vehicule automobile |
JP2018042432A (ja) * | 2016-09-09 | 2018-03-15 | 株式会社ミツバ | 電動モータ、及び減速機付モータ |
JP2019129566A (ja) * | 2018-01-23 | 2019-08-01 | 株式会社ミツバ | モータ装置 |
WO2023119801A1 (ja) * | 2021-12-21 | 2023-06-29 | パナソニックIpマネジメント株式会社 | 電動機及び端子 |
Families Citing this family (3)
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JP6981006B2 (ja) * | 2017-02-03 | 2021-12-15 | 日本電産株式会社 | モータ |
CN114069957A (zh) * | 2020-08-07 | 2022-02-18 | 日本电产(大连)有限公司 | 驱动装置和电气设备 |
CN117439318B (zh) * | 2023-12-20 | 2024-03-26 | 常州市凯迪电器股份有限公司 | 双向提前换向的永磁直流电机 |
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- 2013-07-12 JP JP2015526113A patent/JPWO2015004795A1/ja active Pending
- 2013-07-12 US US14/903,387 patent/US20160156243A1/en not_active Abandoned
- 2013-07-12 EP EP13889080.1A patent/EP3021462A4/en not_active Withdrawn
- 2013-07-12 WO PCT/JP2013/069116 patent/WO2015004795A1/ja active Application Filing
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FR3050969A1 (fr) * | 2016-05-09 | 2017-11-10 | Valeo Systemes Dessuyage | Arbre de rotation et groupe motoreducteur equipe d'un tel arbre pour un systeme d'essuyage d'un vehicule automobile |
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JP2019129566A (ja) * | 2018-01-23 | 2019-08-01 | 株式会社ミツバ | モータ装置 |
WO2023119801A1 (ja) * | 2021-12-21 | 2023-06-29 | パナソニックIpマネジメント株式会社 | 電動機及び端子 |
Also Published As
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EP3021462A4 (en) | 2017-05-10 |
JPWO2015004795A1 (ja) | 2017-03-02 |
EP3021462A1 (en) | 2016-05-18 |
US20160156243A1 (en) | 2016-06-02 |
CN105379075A (zh) | 2016-03-02 |
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