JP2519680Y2 - Drive system for electric retractable outside mirror for vehicle - Google Patents

Description

[Detailed description of the device]

[0001]

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

[0002]

2. Description of the Related Art As shown in FIG. 24, a conventional drive device of this type includes a device main body 82 composed of a housing 81a and a cover 81. Inside the device main body 82, a drive assembly 83 and a support shaft are provided. An assembly 84 and a switch mechanism 85 are provided, and the drive assembly 83 is a drive motor 86.
A planetary gear speed reducer 87 is provided on the output side of the above, and a first clutch mechanism 89 is provided on the output shaft 88 of the planetary gear speed reducer 87. The clutch mechanism 89 includes a clutch plate 90 fixed to the output shaft 88.
An engaging projection 92 is provided on the output shaft 88, and a gear 91 is rotatably provided on the output shaft 88. An engaging recess 93 is provided on the gear 91.
4, the engaging projection 92 engages with the engaging recess 93, and the two are joined.

Further, the support shaft assembly 84 includes a support shaft 95, and the clutch mechanism 9 is provided below the support shaft 95.
6 are provided. This clutch mechanism 96 is a bracket 9
7 and a clutch plate 98, and a recess 99 is formed on the upper surface of the bracket 97 at a position where the circumference is divided into three equal parts. Further, a ball fitting recess 100 is formed on the lower surface of the clutch plate 98 at a position where the circumference is divided into three equal parts, and a gear 101 is formed on the clutch plate 98. Bracket 9
7 is attached to the device main body 82 by its attachment leg portion, the ball 103 rotatably fitted in the ball fitting concave portion 100 of the clutch plate 98 is inserted into the concave portion 99 of the bracket 97, and the gear 101 is the gear 91. Meshes with. The clutch plate 98 is pressed by the spring 104 via the spring receiving member 105 and the thrust bearing 106.

A stopper mechanism 107 is provided above the support shaft assembly 84. This stopper mechanism 10
7 includes a bracket 108 fixed to the upper surface of the apparatus main body as shown in FIG.
A concave portion 109 is formed in the concave portion 109, and both end surfaces of the concave portion 109 are formed as stopper portions 110, and a stopper 112 is provided on the lower surface of the flange 111 of the support shaft 95. The stopper 112 is formed in the concave portion 109. I have inserted it.

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 passes through the gear 101.
Rotates. By this rotation, the ball 103 of the clutch mechanism 96 comes out of the fitting concave portion 99 of the bracket 97, the support shaft 95 rotates, and the stay 114 rotates.
Fourteen fixed outside mirrors are stored.

On the other hand, when the outside mirror collides with an obstacle and an unreasonable load is applied to the stay 114, the clutch mechanism 89 releases the engagement and the clutch is disengaged, and the drive motor 83 side. The rotation of the support shaft 95 is not transmitted to the drive shaft, and the drive motor 86 is prevented from being burnt or the like.

Moreover, in the above drive device, the switch assembly 11 of the switch mechanism 85 is formed by the arrangement of other components.
5 is mounted below the spring 104, and the switch assembly 115 is screw 11
Had to be fixed by 6.

[0008]

However, in the conventional example, the switch assembly 115 includes the spring 104.
Since it is assembled at a position lower than the above, and it is close to the gear 101, it is likely to be contaminated with oil or the like of the gear 98. Further, since the switch assembly 115 needs to be fixed with the screw 116, misalignment occurs. It was easy to wake up. Furthermore, the wiring with the drive motor 86 becomes long, and there is a problem that assembly is difficult.

The present invention solves the above problems, and the switch assembly can be installed at a position above the spring so that it is not contaminated by gear oil and the screw is Provided is a drive device for an electric retractable outside mirror for a vehicle, which enables the switch assembly to be attached to the housing without needing any misalignment, shortens the wiring with the drive motor, and facilitates assembly. Aim to do.

[0010]

In order to achieve the above object, the present invention provides a drive motor (19) in a device body (11) and a speed reducer provided on the output side of the drive motor (19). a mechanism (20, 26) drive assembly and a (21), against the support shaft by operating the clutch mechanism (28) by the drive of the drive assembly (21) and (4) the spring (29) Pushing up and locking mechanism (80)
A support shaft assembly (32) that unlocks the support shaft (4) and rotates the support shaft (4), and an inner switch part (67) that is incorporated in the support shaft assembly (32) and rotates together with the support shaft (4).
And has external switch unit (68), and a plurality of mounting legs in a circumferential portion of the external switch unit (67) and a switch assembly (66) forming a (69), the switch assembly (6
6) is supported in the hole (67a) of the inner switch part (67)
With the intermediate portion of the shaft (4) inserted and engaged, the mounting leg (6
9) Remove the switch mounting part (71) of the housing (5).
Inserted into the leg insertion part (72), the hole of the mounting leg part (69)
A protrusion (73) provided on the mounting leg insertion portion (72) on (70)
Is attached to the housing (5), and
Switch to external switch (68) via washer (74).
Abut the last washer (75) and attach the thrust washer.
The spring between the gear (75) and the driven gear (35).
(29) is interposed, and the washer (74) is
The lower surface of the switch mounting portion (71) is provided in the locking hole (74a).
The washer locking part (71a) is inserted and locked.
Characterized in that it.

[0011]

With this construction, the switch assembly can be assembled at a position higher than the spring, and since it is far from the gear, it is not contaminated by the oil of the gear, and the switch assembly has its mounting legs. Part is inserted and locked in the mounting leg insertion part of the switch mounting part of the housing, the thrust washer is brought into contact with the external switch part through the washer, and the thrust washer is held by the biasing force of the spring so that it can be mounted on the housing. In addition, because it does not require a screw, there is no misalignment,
Wiring to the drive motor is also shortened, making assembly easier.

[0012]

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

FIG. 1 is a layout explanatory view of an outside mirror in a vehicle, and FIG. 2 is a vertical cross-sectional view of a drive device for an electric retractable outside mirror for a vehicle according to the present invention.

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

As shown in FIG. 2, the driving device 3 is provided with a device body 11 composed of a housing 5 and a cover 10. The cover 10 covers an opening 12 of the housing 5, and a screw 13 is used to cover the housing. It is fixed to 5. A drive assembly accommodating portion 6, a support shaft assembly accommodating portion 7, and a gear assembly accommodating portion 8 connected to both accommodating portions 6 and 7 are formed in the apparatus main body 11. A partition wall 9 is provided between the support shaft assembly accommodating portion 7. The cover 10 is formed with a shaft bearing hole 14 located in the drive assembly housing portion 6 and a shaft bearing hole 15 located in the support shaft assembly housing portion 7, and the end surface of the partition wall 9 is formed. Axial holes 16 and 17 are formed in the surface of the cover 10 that opposes the end face. In addition, the support hole 1 through which the support shaft assembly accommodating portion 7 is removed is provided in the apparatus body 11.
8 is provided. In addition, as shown in FIG.
A stopper 57 having a planar arc shape is provided on the upper surface of the above so as to be located at the peripheral portion of the bearing hole 18. Further, a switch mounting portion 71 is formed on the support shaft assembly accommodating portion 7 of the housing 5 as shown in FIG.
Mounting leg insertion portions 72 are formed at three lower ends of the mounting leg insertion portion 1, and the projections 7 are formed on the bottoms of the mounting leg insertion portions 72.
3 is protruding. A washer engaging portion 71a is provided on the lower surface of the switch mounting portion 71 so as to project therefrom.

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 housed and fixed in the drive assembly housing portion 6, and the output of the speed reduction mechanism 20 is fixed. The shaft 22 is supported in the shaft support hole 14 via a bush 22b. The gear attachment portion 22a of the output shaft 22 has a semicircular cross section as shown in FIG. 7, and the hole portion 23a of the drive gear 23 attached to the gear attachment portion 22a is not a circle but about 23
A hole having an angle of 0 degree. The drive gear 23 has a hole 23a into which the gear mounting portion 22a is inserted to output the output shaft 22.
The drive gear 23 is rotatable about 230 degrees with respect to the output shaft 22.

A deceleration mechanism 26, which is a gear assembly formed by coaxially forming a large-diameter intermediate gear 24 and a small-diameter intermediate gear 25 in the gear assembly accommodating portion 8, is rotatable by a bearing shaft 27. The support shaft 27 is supported and provided, and both ends of the support shaft 27 are inserted and fixed in the shaft holes 19 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 provided in the support shaft assembly accommodating portion 7.
A support shaft assembly 32 having a and is housed. That is, the clutch mechanism 28 includes a lower bracket 33 and a clutch plate 34, and the bracket 33 includes a disc-shaped bracket main body 36 as shown in FIGS. 10 to 13, and the bracket main body 36. A mounting leg portion 37 is formed on the peripheral portion of the bracket, and a concave portion 38 is formed on the upper surface portion of the bracket main body 36 at a position where the circumference is divided into three equal parts. These recesses 38 are formed by forming slopes 38b and 38c in opposite directions at both ends of a bottom surface portion 38a having a flat center.

Further, the clutch plate 34 has an output shaft hole 39 in 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 has its mounting leg portion 3
7, the ball 42, which is attached to the cover with the screw 41 and is rotatably fitted in the ball fitting concave portion 40 of the clutch plate 34, is inserted into the concave portion 38 of the bracket 33,
The driven gear 35 meshes with the intermediate gear 25.

The support shaft 4 is provided with a flange 43 at the upper end thereof as shown in FIGS. An engaging recess 44 is formed on the lower surface of the flange 43 at a position that divides the circumference into three equal parts, and a planar fan-shaped stopper 47 is formed on the central side of the lower surface of the support shaft 4. The angle of the stopper 47 is 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. 17 to 20. The upper bracket 48 is provided with a disc-shaped bracket main body 49, and a circular recess 50 is formed in the bracket main body 49, and the circumference of the circular recess 50 is divided into three equal parts. Screw insertion parts 51 are formed in these screw insertion parts 51 and holes 5 are formed in these screw insertion parts 51.
2 is formed. A hole 53 and a pair of arc-shaped holes 54 centered on the center O of the hole 53 are formed in the center of the circular recess 50. This arcuate hole 54 is 140
It has an opening angle of degrees. Also, the bracket body 49
Engaging projections 55 are formed on the lower surface of the device at positions 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 by using the hole 52 of the screw insertion portion 51. In this case, the stopper 57 projecting from the upper surface of the housing 5 has a stopper 57. It penetrates through the arcuate hole 54 on the right side of 48 and projects into the circular recess 50.

The support shaft 4 is provided with a hole 53 in the upper bracket 48 and a bush 58 provided in the support 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 to the portion protruding further downward.
The flange 43 of the support shaft 4 is superposed on the upper bracket 48, the stopper 47 of the support shaft 4 is inserted into the circular recess 50 of the upper bracket 48, and the engagement protrusion 55 is inserted into the engagement recess 44. They are engaged with each other, and these constitute the locking means 80. The shaft portion 4a supported by the support hole 18 is liquid-tight by an O-ring 59.

Further, the flange 43 of the support shaft 4 is shown in FIG.
A flange cover 60 shown in FIG. 23 is attached.
The upper surface 60a of the flange cover 60 is provided with holes 61 at positions that divide the circumference into three equal parts, and projections 62 on the ring are formed at the upper peripheral portions of these holes 61. The peripheral portion 60b of the flange cover 60 has an O-ring 6 inserted into an O-ring insertion concave portion 64 formed by the O-ring insertion portion 63 of the peripheral portion of the upper bracket 48 and the upper surface of the housing 5.
5, holding down the housing 5 and the upper bracket 48
Maintains liquid tightness between.

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 the pattern contact with the external switch portion 68 by the rotation of the inner switch portion 67. The external switch portion 68 has a plurality of mounting leg portions 69 on its peripheral portion.
Are formed, and holes 70 are formed in these mounting legs 69.

In the switch assembly 66, the mounting leg portion 69 of the switch assembly 66 is inserted into the hole 67a of the inner switch portion 67 so that the intermediate portion of the support shaft 4 is inserted and engaged with the lower end portion of the switch mounting portion 71 of the housing 5. It is inserted in the mounting leg insertion portion 72 of the above, and the projection 73 provided in 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.

Then, the thrust washer 75 is attached to the external switch portion 68 of the switch assembly 66 via the washer 74.
Are in contact with each other, and a spring 29 is interposed between the thrust washer 75 and the driven gear 35. In addition,
The washer 74 has a lock hole 74a through which a washer lock portion 71a on the lower surface of the switch mounting portion 71 is inserted and locked.

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 studded on the upper surface of the flange 43 of the support shaft 4, and the stud bolts 76 project upward from the holes 61 of the flange cover 60 and are mounted on the flange cover 60. Base member 75
A is mounted on the support shaft 4 by inserting the stud bolt 76 into the hole 77 formed in the base member 75A and tightening the nut member 78. In this case, the ring-shaped projection 62 formed on the flange cover 60 is crushed by the base member 75 to ensure waterproofing.

Next, the storage of the outside mirror will be described.

When the drive motor 19 is driven, the output shaft 2
After 2 rotates a predetermined amount, the drive gear 23 rotates, the driven gear 35 rotates via the intermediate gears 24 and 25, and the clutch plate 34 and the support shaft 4 rotate by a certain angle.

By this rotation, the ball 42 of the clutch mechanism 28 comes out of the fitting recess 38 of the lower bracket 33,
The support shaft 4 is lifted up against the spring 29, the locking projection 55 comes out of the locking recess 44, the support shaft 4 rotates, the stay 2 rotates, and the outside mirror 1 is stored.

According to the above embodiment, the switch assembly 6
6 is attached to a position above the spring 29, and the driven gear 3 is moved away from the driven gear 35.
5 does not become dirty with oil or the like, and the switch assembly 66 inserts and locks its mounting leg portion 69 into the mounting leg insertion portion 72 of the switch mounting portion 71 of the housing 5, and the washer 74 is attached to the external switch portion 68. Through thrust washer 75
The thrust washer 75 to the spring 29.
Since the screw is not required so that it can be attached to the housing 5 by being held by the urging force of No. 3, there is no positional deviation, the wiring with the drive motor 19 is shortened, and the assembly is easy.

[0035]

As described above, according to the present invention, the drive motor (19) and the reduction mechanism (20, 26) provided on the output side of the drive motor (19) are provided in the apparatus body (11).
And a drive mechanism (21) provided with a drive mechanism (21), and a clutch mechanism (28) is actuated by the drive of the drive assembly (21) to push up the support shaft (4) against the spring (29) to lock the mechanism. A support shaft assembly (32) for unlocking the support shaft (4) by unlocking the support shaft (80), and an inner switch part which is incorporated in the support shaft assembly (32) and rotates together with the support shaft (4). (67) and external switch section (68)
And a switch assembly (66) in which a plurality of mounting legs (69) are formed around the outer switch portion (67), and the switch assembly (66) is an inner switch portion.
Insert the middle part of the support shaft (4) into the hole (67a) of (67).
Attach the mounting leg (69) to the housing (5) in the engaged state.
Insert it into the mounting leg insertion part (72) of the switch mounting part (71)
Insert the mounting leg into the hole (70) of the mounting leg (69).
Housing by inserting the protrusion (73) provided on (72)
It is attached to (5), and the external switch (6
8) through the washer (74) to the thrust washer (7
5) abut, thrust thruster (75) and driven gear
Insert the spring (29) between the
And the washer (74) has its locking hole (74a).
The washer locking part on the lower surface of the switch mounting part (71).
(71a) is inserted and locked, so that the switch assembly can be assembled at a position higher than the spring, and since it is far from the gear, it is not contaminated with oil of the gear, etc. The switch assembly inserts and locks its mounting leg into the mounting leg insertion part of the switch mounting part of the housing, abuts the thrust washer on the external switch via the washer, and holds this thrust washer by the biasing force of the spring. By doing so, since no screw is required so that the housing can be attached to the housing, there is no misalignment, the wiring to the drive motor is shortened, and assembly is facilitated.

[Brief description of drawings]

FIG. 1 is an explanatory view of the layout of outside mirrors in a vehicle.

FIG. 2 is a vertical sectional view of a drive device for an 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 system.

FIG. 4 is a plan view of the drive unit.

FIG. 5 is a perspective view of the drive unit with a part thereof omitted.

FIG. 6 is a vertical sectional view of a housing in the drive system.

FIG. 7 is a partial cross-sectional plan view of a gear train in the drive system.

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

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

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

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

FIG. 12 is a view from the direction of FIG. 11A.

FIG. 13 is a 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 an 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 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 part D of FIG. 22.

FIG. 24 is a vertical cross-sectional view of a drive device for a conventional electric retractable outside mirror for a vehicle.

FIG. 25 is a perspective view of a stopper mechanism of the drive unit in an exploded state.

[Explanation of symbols]

4 Support Shaft 5 Housing 11 Device Main Body 19 Drive Motor 20 Reduction Mechanism 21 Drive Assembly 23 Drive Gear 24 Intermediate Gear 25 Intermediate Gear 26 Reduction Mechanism 28 Clutch Mechanism 29 Spring 32 Support Shaft Assembly 35 Driven Gear 66 Switch Assembly 67 Internal Switch 68 External switch 80 Locking mechanism

Claims (1)

(57) [Scope of utility model registration request] 1. A drive motor (1 ) is provided in an apparatus body (11) .
9) and a drive assembly (2 ) including a reduction mechanism (20, 26) provided on the output side of the drive motor (19)
1) and the driving of the drive assembly (21) actuates the clutch mechanism (28) to push up the support shaft (4) against the spring (29) to release the locking by the locking mechanism (80). Support shaft assembly for rotating the support shaft (4)
(32) , an inner switch part (67) incorporated in the support shaft assembly (32) and rotating with the support shaft (4) , and an outer switch part (68) , and an outer switch part.
A plurality of mounting legs in a circumferential portion (67) and a formed switch assembly (66) to (69), the switch assembly (6
6) is supported in the hole (67a) of the inner switch part (67)
With the intermediate portion of the shaft (4) inserted and engaged, the mounting leg (6
9) Remove the switch mounting part (71) of the housing (5).
Inserted into the leg insertion part (72), the hole of the mounting leg part (69)
A protrusion (73) provided on the mounting leg insertion portion (72) on (70)
Is attached to the housing (5), and
Switch to external switch (68) via washer (74).
Abut the last washer (75) and attach the thrust washer.
The spring between the gear (75) and the driven gear (35).
(29) is interposed, and the washer (74) is
The lower surface of the switch mounting portion (71) is provided in the locking hole (74a).
The washer locking part (71a) is inserted and locked.
A drive device for an electric retractable outside mirror for a vehicle, comprising: