JP2589014Y2 - Drive device for electric retractable outside mirror for vehicles - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving device for an electrically retractable outside mirror for a vehicle.

[0002]

2. Description of the Related Art As shown in FIG. 25, a conventional driving device of this type includes a device main body 82 comprising a housing 81a and a cover 81, in which a drive assembly 83 and a support shaft are provided. An assembly 84 and a switch mechanism 85 are provided, and a drive assembly 83 includes a drive motor 86
, A planetary gear reducer 87 is provided on the output side, and a first clutch mechanism 89 is provided on an output shaft 88 of the planetary gear reducer 87. The clutch mechanism 89 includes a clutch plate 90 fixed to an output shaft 88.
Is provided with an engagement protrusion 92, a gear 91 is rotatably provided on the output shaft 88, and an engagement recess 93 is provided on the gear 91, and the gear 91 is provided with a spring 9.
4, the engaging projections 92 are engaged with the engaging recesses 93, and the two are connected.

The support shaft assembly 84 has a support shaft 95, and a clutch mechanism 9 is provided below the support shaft 95.
6 are provided. The clutch mechanism 96 includes the bracket 9
7 and a clutch plate 98, and a concave portion 99 is formed on the upper surface of the bracket 97 at a position where the circumference is divided into three equal parts. A ball fitting recess 100 is formed on the lower surface of the clutch plate 98 at a position obtained by dividing the circumference into three equal parts, and a gear 101 is formed on the clutch plate 98. Bracket 9
Reference numeral 7 denotes a mounting leg portion, which is mounted on the apparatus main body 82, and a ball 103 rotatably fitted into a ball fitting recess 100 of a clutch plate 98 is provided with a ball fitting recess 9 of a bracket 97.
9, the gear 101 is meshed with the gear 91. The clutch plate 98 is pressed by a spring 104 via a spring receiving member 105 and a thrust bearing 106.

When the drive motor 86 is driven,
After the output shaft 88 of the drive motor 86 rotates a predetermined amount, the gear 91 rotates, and the support shaft 95
Rotates. Due to this rotation, the ball 103 of the clutch mechanism 96 escapes from the ball fitting concave portion 99 of the bracket 97, the support shaft 95 rises, and the engaging concave portion of the flange 109 disengages from the engaging protrusion of the upper bracket 108.
Rotates, and the stay 114 rotates, and the outside mirror fixed to the stay 114 is stored.

[0005]

However, in the conventional example, during storage, the clutch plate 98 is rotated, the ball 103 is disengaged from the ball fitting recess 99, and the support shaft 95 is lifted up against the spring 104. The engagement recess of the flange 109 of the support shaft 95 is disengaged from the engagement protrusion of the upper bracket 108, and the clutch plate 98 rotates to the storage position. At the time of return, the clutch plate 98 rotates in the opposite direction to that at the time of storage.
6 stops, but in this case, a force is exerted on the ball 103 to fall into the ball fitting recess 99, and the gear 101 and the gear 91 try to rotate. However, since the gear 91 is fixed to the output shaft 88, the gear 101 and the gear 91 do not rotate.

For this reason, the timing of turning off the cutoff switch of the power supply circuit of the drive motor 86 cannot be set widely, and there is no backlash, so that the gear teeth are difficult to fit during assembly and the assemblability is poor. there were.

The present invention solves the above-mentioned problems. The timing of turning off the cutoff switch of the power supply circuit of the drive motor can be set widely from immediately before the set to the set position. An object of the present invention is to provide a drive device for a vehicle electric retractable outside mirror that can rotate a drive gear and improve assemblability when gear teeth are out of alignment.

[0008]

In order to achieve the above-mentioned object, the present invention provides a drive assembly and a support shaft assembly in an apparatus main body. The drive assembly is provided with a drive motor and the drive motor. of the reduction mechanism provided on the output side, a predetermined angle rotatable Yu the output shaft of the driving gear of the speed reduction mechanism
The support shaft assembly includes a support shaft connected to the stay, a locking mechanism for locking the support shaft to the apparatus main body, and a support mechanism for lifting the support shaft against a spring. A clutch mechanism for releasing the stop and a driven gear fixed to a member on the support shaft side of the clutch mechanism, and the locking mechanism is provided on a plurality of engagement portions formed on the lower surface of the flange of the support shaft, A plurality of engagement portions formed on the upper surface of the bracket are releasably engaged, one of these engagement portions is formed as an engagement recess and the other is an engagement protrusion, and the clutch mechanism is provided with a device body. Center on the top of the lower bracket
With a flat surface on each end of this plane
A plurality of recesses having slopes are formed, a plurality of ball fitting recesses are formed on the lower surface of the clutch plate fixed to the support shaft, and the balls rotatably fitted in the ball fitting recesses.
A speed reduction mechanism is configured to be inserted into the recess, and an intermediate gear meshing with the driven gear and an intermediate gear meshing with the driving gear are coaxially arranged vertically above and below the drive assembly and the support shaft assembly. Further, the driven gear is characterized in that the driven gear has a thickness capable of maintaining the meshing relationship with the intermediate gear meshing with the intermediate gear when the support shaft is lifted.

[0009]

With this configuration, when retracted, the clutch plate rotates, the ball comes off the ball fitting recess, the support shaft lifts up against the spring, and the engaging portion of the support shaft comes off the engaging portion of the upper bracket. The clutch plate rotates to the retracted position. When returning, the clutch plate rotates in the opposite direction to the retracted state, the power supply circuit of the drive motor is shut off immediately before setting, and this drive motor stops, but in this case, the ball falls into the ball fitting recess. The force to be engaged acts to rotate the driven gear, intermediate gear and drive gear. However, since the drive gear of the speed reduction mechanism is mounted so as to be rotatable with respect to the output shaft, the driven gear, the intermediate gear, and the drive gear rotate, and the engaging portion of the support shaft meshes with the engaging portion of the upper bracket. Fixed.

[0010] For this reason, the timing of turning off the cutoff switch of the power supply circuit of the drive motor can be set widely from immediately before setting to the set position. Can be rotated together, and assemblability is also improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIG. 1 is an explanatory view of an arrangement of an outside mirror in a vehicle, and FIG. 2 is a longitudinal sectional view of a drive device of an electrically retractable outside mirror for a vehicle according to the present invention.

An outside mirror 1 is held by a stay 2, and a lower end of the stay 2 is attached to a support shaft 4 of a driving device 3 fixed to the vehicle body. Is rotated to store the outside mirror 1.

As shown in FIG. 2, the driving device 3 includes a device main body 11 composed of a housing 5 and a cover 10. The cover 10 covers an opening 12 of the housing 5. 5 is fixed. In the apparatus body 11, a drive assembly housing 6, a support shaft assembly housing 7, and a gear assembly housing 8 connected to the two housings 6, 7 are formed. A partition 9 is provided between the support shaft assembly accommodating portion 7 and the support shaft assembly accommodating portion 7. The cover 10 has a shaft support hole 14 formed in the drive assembly housing 6 and a shaft support hole 15 formed in the support shaft assembly housing 7, respectively. Shaft holes 16 and 17 are formed in the surface of the cover 10 opposite to the end face. In addition, a support hole 1 that is inserted into the support shaft
8 are provided. Also, as shown in FIG.
On the upper surface of the upper surface, a stopper 57 having a flat circular arc shape is provided so as to protrude from the periphery of the bearing hole 18. Further, as shown in FIG. 9, a switch mounting portion 71 is formed above the support shaft assembly housing portion 7 of the housing 5.
At the lower end of the mounting leg insertion portion 72, three mounting leg insertion portions 72 are formed.
3 is protruding. Further, a washer engaging portion 71a is protruded from the lower surface of the switch mounting portion 71.

A drive assembly 21 including a drive motor 19 and a speed reduction mechanism 20 provided on the output side of the drive motor 19 is fixedly accommodated in the drive assembly housing portion 6. The shaft 22 is supported in the shaft support hole 14 via a bush 22b. The gear mounting portion 22a of the output shaft 22 has a semicircular cross section as shown in FIG. 7, and the hole 23a of the driving gear 23 mounted on the gear mounting portion 22a is not circular but approximately 23 mm.
A hole having an angle of 0 degrees. The drive gear 23 is formed by inserting a gear mounting portion 22a into a hole 23a of the output shaft 22.
Is attached to the drive gear 23 is approximately 230 ° rotatable such so that play with respect to the output shaft 22 is provided.

In the gear assembly accommodating portion 8, a reduction mechanism 26, which is a gear assembly having a large-diameter intermediate gear 24 and a small-diameter intermediate gear 25 formed coaxially, is rotatable by a bearing shaft 27. The bearing shaft 27 has both ends inserted and fixed in the shaft holes 16 and 17. The intermediate gear 24 meshes with the drive gear 23.

A clutch mechanism 28, a spring 29, a switch mechanism 30, and a support shaft 4
Are accommodated. That is, the clutch mechanism 28 includes a lower bracket 33 and a clutch plate 34. The bracket 33 includes a disk-shaped bracket body 36 as shown in FIGS. A mounting leg 37 is formed on the periphery of the bracket, and a concave portion 38 is formed on the upper surface of the bracket body 36 at a position obtained by dividing the circumference into three equal parts. These recesses 38 it across the central flat bottom surface portion 38a
Each reverse slope 38b, is obtained by forming a 38c.

The clutch plate 34 has an output shaft hole 39 at the center thereof, and a ball fitting recess 40 is formed on the lower surface of the clutch plate 34 at a position where the circumference is divided into three equal parts. A driven gear 35 is fixed to the clutch plate 34.

The bracket 33 is attached to the mounting leg 3.
7, the ball 42 attached to the cover with the screw 41 and rotatably fitted to the ball fitting recess 40 of the clutch plate 34 is inserted into the recess 38 of the bracket 33,
The driven gear 35 meshes with the intermediate gear 25, and has a thickness such that when the driven gear 35 moves up and down together with the support shaft 4, the engagement with the intermediate gear 25 does not come off.

The support shaft 4 has a flange 43 at its upper end as shown in FIGS. An engagement recess 44 as an engagement portion is formed on the lower surface of the flange 43 at a position where the circumference is divided into three equal parts, and a support shaft-side stopper having a flat fan shape at the center side is formed on the lower surface of the support shaft 4. The support shaft side stopper 47 has an angle of 90 degrees. A flat surface 45 is formed in the middle of the support shaft 4, and a stay engagement hole 46 is formed in the center of the flange 43.

The upper bracket 48 is shown in FIGS. The upper bracket 48 is provided with a disk-shaped bracket body 49, and a circular recess 50 is formed in the bracket body 49, and the circumference of the circular recess 50 is divided into three equal parts. Screw insertion portions 51 are formed in these screw insertion portions 51, and holes 5 are formed in these screw insertion portions 51.
2 are formed. The circular recess 50 has a hole 53 at the center and a pair of arc holes 54 centered on the center O of the hole 53. This arc-shaped hole 54 is 140
It has an opening angle of degrees. Also, the bracket body 49
An engagement projection 55 is formed on the lower surface of the at a position obtained by dividing the circumference into three equal parts.

The upper bracket 48 is fixed to the upper surface of the housing 5 with a screw 56 using the hole 52 of the screw insertion portion 51. In this case, a fixed stopper 57 protruding from the upper surface of the housing 5 is provided. It penetrates the circular arc hole 54 on the right side of the upper bracket 48 and protrudes into the circular concave portion 50.

The support shaft 4 is provided with a bush 58 provided in the hole 53 of the upper bracket 48 and the bearing hole 18 of the housing 5.
And the lower end of the support shaft 4 is inserted into the output shaft hole 39 of the clutch plate 34.
An E-ring 58 is fitted on a portion projecting downward.
The flange 43 of the support shaft 4 is overlapped with the upper bracket 48, and the support shaft side stopper 47 is
8 is inserted into the circular concave portion 50, and the engaging protrusion 55 is engaged with the engaging concave portion 44, and these constitute the locking mechanism 80. The shaft portion 4a supported by the support hole 18 is made liquid-tight by an O-ring 59.

Further, the flange 43 of the support shaft 4 is
23 is mounted.
Holes 61 are provided in the upper surface portion 60a of the flange cover 60 at positions where the circumference is divided into three equal parts, and an annular projection 62 is formed at the upper part of the periphery of these holes 61. The peripheral portion 60 b of the flange cover 60 presses the O-ring 65 inserted into the O-ring insertion portion 63 of the peripheral portion of the upper bracket 48 and the O-ring insertion recess 64 formed by the upper surface of the housing 5. Liquid tightness with the upper bracket 48 is maintained.

The switch mechanism 30 is provided with a switch assembly 66 as shown in FIG. 9, and the switch assembly 66 is turned on and off by a pattern contact with an external switch portion 68 by rotation of the inner switch portion 67. The external switch 68 has a plurality of mounting legs 69 around its periphery.
These mounting legs 69 have holes 70 formed therein.

When the intermediate portion of the support shaft 4 is inserted into and engaged with the hole 67a of the inner switch 67, the switch assembly 66 is attached to the lower end of the switch mounting portion 71 of the housing 5. The projection 73 provided on the mounting leg insertion portion 72 is inserted into the hole 70 of the mounting leg portion 69, and is attached to the housing 5.

A thrust washer 75 is connected to the external switch 68 of the switch assembly 66 via a washer 74.
A spring 29 is interposed between the thrust washer 75 and the driven gear 35. In addition,
In the washer 74, a washer locking portion 71 a on the lower surface of the switch mounting portion 71 is inserted and locked in the locking hole 74 a.

A base member 75A attached to the lower end of the stay 2 is fixed to the upper surface of the flange cover 60.

That is, stud bolts 76 are stuck on the upper surface of the flange 43 of the support shaft 4, and these studs 76 project above the holes 61 of the flange cover 60, and are stuck on the flange cover 60. Base member 75
A, the studs 76 are inserted into holes 77 provided in the base member 75A, and the base member 75 is attached to the support shaft 4 by tightening the nut member 78. In this case, the annular protrusion 62 formed on the flange cover 60 is crushed by the base member 75 to achieve waterproofing.

Next, storage of the outside mirror will be described. When the drive motor 19 is driven, the drive gear 23 rotates after the output shaft 22 rotates a predetermined amount, and the intermediate gear 24,
25 rotates the driven gear 35 through the clutch plate 34
And the support shaft 4 rotates by a fixed angle.

The ball 42 of the clutch mechanism 28 by this rotation to escape the fitting recess 38 of the lower bracket 33 as shown in FIG. 24, surface portion 33 of the lower bracket 33
Roll on a. At the same time, the support shaft 4 is lifted against the spring 29 and the locking projection 55 is
4, the support shaft 4 rotates, and the stay 2 rotates. Then, the support shaft 4 descends and the locking protrusion 55 moves down because the ball 42 goes down the slope 38 b of the concave portion 38 just before the storage position.
Engages with the engagement recess 44 of the flange 43 and stops at the storage position.

At the time of return, the clutch plate 34 rotates in the opposite direction to that at the time of storage, and the power supply circuit of the drive motor 19 is cut off immediately before setting, and this drive motor 19 stops.
In this case, force acts the ball 42 tries Ochikomo the ball fitting recess 38, the driven gear 35, the intermediate formate Ya 24,2
5 and driving formic ya 23 tends to rotate. However, in order to drive formic Ya 23 of the speed reduction mechanism 20 is attached with a predetermined rotatable idler with respect to the output shaft 22, a driven formic Ya 35, the intermediate formate Ya 24, 25 and the drive gears 23 to rotate the support The engagement recess 44 of the shaft 4 is engaged with the engagement projection 55 of the upper bracket.
It is engaged with and fixed.

[0033] For this, the timing to turn off the interruption switch of the power circuit of the drive motor 1 9 can be widely set and from the set immediately before to the set position, and when leprosy not fit the teeth of the gears during the assembly by the backlash is present, The drive gears can be rotated together, and the assemblability is improved.

[0034]

As described above, according to the present invention, a drive assembly and a support shaft assembly are provided in an apparatus main body, and the drive assembly is provided with a drive motor and a reduction mechanism on the output side of the drive motor. The drive gear of this reduction mechanism is provided with a play that is rotatable at a predetermined angle with respect to the output shaft, and the support shaft assembly is connected to the support shaft connected to the stay and the support shaft. The clutch mechanism comprises a locking mechanism for stopping, a clutch mechanism for lifting the support shaft against the spring and releasing the locking by the locking mechanism, and a driven gear fixed to a member on the support shaft side of the clutch mechanism. The mechanism is configured such that a plurality of engaging portions formed on the upper surface of the upper bracket are detachably engaged with a plurality of engaging portions formed on the lower surface of the flange of the support shaft, and one of these engaging portions is engaged. Constructed with the other part of the engaging recess in the engaging recess And a clutch mechanism, a flat plane at the center on the upper surface of the fixed lower bracket of the apparatus main body
A plurality of recesses are formed at both ends of this plane, each having an inclined surface formed in the opposite direction, and a plurality of ball fitting recesses are formed on the lower surface of the clutch plate fixed to the support shaft. rotatably fitted ball engagement recess constructed by inserting into the recess, between the drive assembly and the support shaft assembly,
A reduction mechanism is provided in which an intermediate gear meshing with the driven gear and an intermediate gear meshing with the driving gear are coaxially arranged vertically, and further, the driven gear is in a state in which the support shaft is lifted with respect to the intermediate gear meshing with the driven gear. In this case, the clutch plate rotates and the ball is disengaged from the ball fitting recess during storage, and the support shaft is lifted up against the spring, thereby engaging the support shaft. The portion is disengaged from the engagement portion of the upper bracket, and the clutch plate rotates to the storage position. At the time of return, the clutch plate rotates in the opposite direction to the retracted state, the power supply circuit of the drive motor is cut off immediately before setting, and this drive motor stops, but in this case,
The force that the ball tries to fall into the ball fitting recess works.
Driven formic Ya, to rotate the intermediate gear and the drive gear. However, since the drive gear of the speed reduction mechanism is mounted so as to be rotatable with respect to the output shaft, the driven gear, the intermediate gear, and the drive gear rotate, and the engaging portion of the support shaft meshes with the engaging portion of the upper bracket. Fixed.

For this reason, the timing of turning off the cut-off switch of the power supply circuit of the drive motor can be set widely from immediately before setting to the set position. In addition, when the gear teeth do not fit properly during assembly due to rattling, the drive gear Can be rotated together, and assemblability is also improved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an arrangement of an outside mirror in a vehicle.

FIG. 2 is a longitudinal sectional view of the driving device of the electric retractable outside mirror for a vehicle according to the present invention.

FIG. 3 is an explanatory diagram of a gear train in the drive device.

FIG. 4 is a plan view of the driving device.

FIG. 5 is a partially omitted perspective view of the driving device.

FIG. 6 is a longitudinal sectional view of a housing in the drive device.

FIG. 7 is a partially sectional plan view of a gear train in the drive device.

FIG. 8 is an exploded perspective view of a stopper mechanism in the driving device.

FIG. 9 is an exploded perspective view of a switch assembly in the drive device.

FIG. 10 is a plan view of a lower bracket in the drive device.

FIG. 11 is a sectional view of the lower bracket.

12 is a view as seen from the direction of the arrow in FIG. 11A.

FIG. 13 is an arrow view from the direction of FIG. 11B.

FIG. 14 is a front view of a support shaft.

FIG. 15 is a plan view of the support shaft.

FIG. 16 is a bottom view of the support shaft.

FIG. 17 is a plan view of the upper bracket.

FIG. 18 is a sectional view of the upper bracket.

FIG. 19 is a bottom view of the upper bracket.

FIG. 20 is a view as seen in the direction of the arrow in FIG. 17C.

FIG. 21 is a plan view of a flange cover.

FIG. 22 is a sectional view of the flange cover.

FIG. 23 is an enlarged view of a part D in FIG. 22;

FIG. 24 is an explanatory diagram illustrating a relationship between a clutch mechanism and a locking mechanism.

FIG. 25 is a longitudinal sectional view of a conventional driving device for an electrically retractable outside mirror for a vehicle.

[Explanation of symbols]

 4 Support Shaft 11 Device Main Body 21 Drive Assembly 28 Clutch Mechanism 32 Support Shaft Assembly 33 Lower Bracket 34 Clutch Plate 38 Recess 40 Ball Fitting Recess 42 Ball 80 Locking Mechanism

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References Japanese Utility Model Hei 1-1171745 (JP, U) Japanese Utility Model Hei 1-147137 (JP, U) Japanese Utility Model Sho 53-9557 (JP, Y2)

Claims (1)

(57) [Scope of request for utility model registration] A drive assembly and a support shaft assembly are provided in an apparatus body, a drive motor, a drive motor and a reduction mechanism provided on an output side of the drive motor, and a drive gear of the reduction mechanism is output. Play that can be rotated by a predetermined angle with respect to the axis
The support shaft assembly is provided with a support shaft connected to the stay, a locking mechanism for locking the support shaft to the apparatus body, and a locking mechanism for lifting the support shaft against a spring. A clutch mechanism for releasing the engagement and a driven gear fixed to a member on the support shaft side of the clutch mechanism,
A locking mechanism engages a plurality of engaging portions formed on an upper surface portion of an upper bracket with a plurality of engaging portions formed on a lower surface portion of a flange of a support shaft in a releasable manner. The clutch mechanism is configured such that one is an engagement recess and the other is an engagement protrusion, and the clutch mechanism has a flat flat surface in the center on the upper surface of the lower bracket to which the apparatus main body is fixed, and has opposite ends on both ends of this flat surface.
A recess forming the orientation of the slope as well as a plurality form, to form a plurality of balls engaging recess on the lower surface of the clutch plate that is fixed to the support shaft, wherein the recess of the ball fitted rotatably into the ball fitting recess insert and configured to, between the drive assembly and the support shaft assembly is provided with a speed reduction mechanism formed by arranging the intermediate gear meshing with the intermediate gear and a drive gear meshing with the driven gear vertically coaxially, further A driven gear having a thickness capable of maintaining a meshing relationship with an intermediate gear meshing with the intermediate gear when the support shaft is lifted, for driving an electrically retractable outside mirror for a vehicle. apparatus.