JPH0520935U - Drive system for electric retractable outside mirror for vehicle - Google Patents

Abstract

(57) [Summary] [Purpose] The outside mirror is retained even during storage, and the rattling of the outside mirror that occurs during storage is eliminated. [Structure] The locking mechanism 80 is configured to engage and disengage a plurality of engaging projections 55 formed on an upper surface of an upper bracket 48 in a plurality of engaging recesses 44 formed on a lower surface of a flange 43 of a support shaft 4. And the clutch mechanism 28 is formed in the recess 38 in the upper surface of the lower bracket 33 fixed to the apparatus body.
And a plurality of ball fitting recesses 40 are formed on the lower surface of the clutch plate 34 fixed to the support shaft.
The ball 42, which is rotatably fitted in the ball fitting recess 40, is inserted into the recess 38 to form the clutch mechanism 28 and the locking mechanism 8.
0 is stored when the ball 42 is inserted into the recess 38,
The engagement projection 55 of the locking mechanism 80 is set in a positional relationship of slidingly contacting the surface portion 48 a of the upper bracket 48.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a drive device for an electric retractable outside mirror for a vehicle.

[0002]

[Prior Art]

 As shown in FIG. 26, a conventional drive device of this type includes a device main body 82 including a housing 81a and a cover 81, and a drive assembly 83 and a support shaft assembly 84 are provided in the device main body 82. And a switch mechanism 85 are provided, the drive assembly 83 is provided with a planetary gear reducer 87 on the output side of the drive motor 86, and a first clutch mechanism 89 is provided on the output shaft 88 of the planetary gear reducer 87. It is provided. The clutch mechanism 89 is provided with a clutch plate 90 fixed to the output shaft 88. The clutch plate 90 is provided with an engaging projection 92, and the output shaft 88 is rotatably provided with a gear 91. The gear 91 is provided with an engaging concave portion 93, and the gear 91 is pressed by a spring 94 so that the engaging projection 92 engages with the engaging concave portion 93 so that the both are coupled.

Further, the support shaft assembly 84 includes a support shaft 95, and a clutch mechanism 96 is provided below the support force shaft 95. The clutch mechanism 96 includes a bracket 97 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. The bracket 97 is attached to the main body 82 of the apparatus by its mounting legs, and the ball 103 rotatably fitted in the ball fitting concave portion 100 of the clutch plate 98 is inserted in the concave portion 99 of the bracket 97. The gear 101 meshes with the gear 91. The clutch plate 98 is pressed by the spring 104 via the spring receiving member 105 and the thrust bearing 106.

A locking mechanism 107 is provided above the support shaft assembly 84. As shown in FIG. 27, this locking mechanism 107 is provided with an upper bracket 108 fixed to the upper surface of the apparatus main body 82, and the lower surface of this upper bracket 108 is divided into three equal parts around the circumference. An engaging projection 109, which is an engaging portion, is formed on the. Further, the support shaft 95 has a flange 110 at its upper end, and a lower surface of the flange 110 is formed with an engaging recess 111 at a position where the circumference is divided into three equal parts, and the engaging projection 109 is provided. Are engaged with the engaging recess 111.

When the drive motor 86 is driven, the output shaft 88 of the drive motor 86 rotates, then the gear 91 rotates, and the support shaft 95 rotates via the gear 101. By this rotation, the ball 103 of the clutch mechanism 96 escapes from the fitting recess 99 of the bracket 97, the support shaft 95 rises and the engagement recess 111 disengages from the engagement projection 109, and the support shaft 95 rotates and the steering shaft 95 rotates. The -114 rotates, and the outside mirror fixed to the stem 114 is stored.

[0006]

[Problems to be solved by the device]

 However, in the conventional example, as shown in FIG. 27, the engaging projection 109 of the locking mechanism 107 has the upper side on which the engaging recess 111 is formed before the ball 103 is stored in the recess 99. There is no holding force because it is separated from the surface of the bracket 108, and there is a time lag, which appears as rattling during operation, so it remains rattled even if the outside mirror moves to the storage position. There was a problem.

The present invention solves the above-mentioned problems, and even when stored, the outside mirror is retained, and the rattling of the outside mirror that occurs during storage can be eliminated. The purpose is to provide a drive device for an outside mirror.

[0008]

In order to achieve the above object, the present invention provides a drive motor and a speed reduction mechanism provided on the output side of the drive motor in the apparatus body. A drive assembly that is provided, and a drive shaft assembly that drives the drive mechanism to push up the support shaft against a spring to release the lock by the lock mechanism and rotate the support shaft. And a plurality of engaging portions formed on the lower surface of the flange of the support shaft, and a plurality of engaging portions formed on the upper surface of the upper bracket are disengageably engaged with each other. One of the engaging parts is configured as an engaging concave part and the other is an engaging projection, and the clutch mechanism is formed on the upper surface of the lower bracket fixed to the device main body with a plurality of concave parts and fixed to the support shaft. On the lower surface of the clutch plate A ball that is rotatably fitted in the ball fitting recess is inserted in the recess to lock the clutch mechanism and the locking mechanism during storage when the ball is inserted in the recess. It is characterized in that the engaging projection of the mechanism is set in a positional relationship of slidingly contacting the surface of the portion where the engaging recess is formed.

[0009]

[Action]

 With this structure, when the ball is inserted into the recess, the engaging projection of the locking mechanism makes sliding contact with the surface of the portion where the engaging recess is formed. The outside mirror is retained. Therefore, it is possible to eliminate the rattling of the outside mirror that occurs during storage.

[0010]

【Example】

 Hereinafter, the present invention will be described 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 steering wheel-2, and the lower end portion of the steering wheel-2 is attached to a support shaft 4 of a driving device 3 fixed to the vehicle body side. Thus, the stage-2 is rotated to store the outside mirror-1.

As shown in FIG. 2, the drive device 3 includes a device body 11 including a housing 5 and a cover 10. The cover 10 covers an opening 12 of the housing 5, and the screw 10 It is fixed to the housing 5 by 13. 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 body 11. A partition wall 9 is provided between the portion 6 and the supporting shaft assembly 3D accommodating portion 7. The cover 10 is formed with a shaft support hole 14 located in the drive assembly housing portion 6 and a shaft support hole 15 located in the support shaft assembly housing portion 7, respectively, and the partition wall 9 is formed. The end face and the cover 10 which opposes this end face are provided with shaft holes 16 and 17 respectively in the face portions. Further, the device body 11 is provided with a bearing hole 18 through which the support shaft assembly accommodating portion 7 is pulled out. Further, as shown in FIG. 6, a stopper 57 having a planar arc shape is provided on the upper surface of the housing 5 so as to be located at the peripheral portion of the bearing hole 18. Further, as shown in FIG. 9, a switch mounting portion 71 is formed on the upper portion of the support shaft assembly accommodating portion 7 of the housing 5, and the lower end portion of the switch mounting portion 71 has three mounting leg insertion portions 72. Are formed, and projections 73 are provided on the bottoms of these mounting leg insertion portions 72. 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. The output shaft 22 of the reduction mechanism 20 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 portion 23a of the drive gear 23 mounted on the gear mounting portion 22a is not circular but approximately 230 It is a hole having an angle of degrees. The drive gear 23 is attached to the output shaft 22 by inserting the gear attachment portion 22a into the hole 23a thereof, and 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 housing portion 8, is rotatable by a bearing shaft 27. The support shaft 27 is inserted into and fixed to the shaft holes 19 and 17 at both ends. The intermediate gear 24 meshes with the drive gear 23.

A support shaft assembly 32 including a clutch mechanism 28, a spring 29, a switch mechanism 30, and a support shaft 4 is housed in the support shaft assembly housing portion 7.

That is, the clutch mechanism 28 includes a lower bracket 33 and a clutch plate 34, and the lower bracket 33 includes a disc-shaped bracket body 36 as shown in FIGS. 10 to 13. A mounting leg portion 37 is formed on the peripheral portion of the bracket main body 36, 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, 38c in opposite directions at both ends of a bottom surface 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 lower bracket 33 is attached to the cover with a screw 41 by its attachment leg portion 37, and a ball 42 rotatably fitted in a ball fitting recess 40 of the clutch plate 34 is attached to the lower bracket 33. It is inserted in the recess 38 of the lower bracket 33, and the driven gear 35 meshes with the intermediate gear 25.

As shown in FIGS. 14 to 16, the support shaft 4 has a flange 43 at the upper end thereof. On the lower surface of the flange 43, an engaging recess 44 as an engaging portion is formed at a position that divides the circumference into three equal parts. On the lower surface of the support shaft 4, a flat fan-shaped support shaft side stopper is provided at the center side. -47 is formed, and the angle of this support shaft side stopper -47 is 90 degrees. Further, a flat surface 45 is formed on the intermediate portion of the support shaft 4.

The upper bracket 48 is shown in FIGS. 17 to 20. The upper bracket 48 has a disc-shaped bracket body 49, and a circular recess 50 is formed in the bracket body 49. The circumference of the circular recess 50 is divided into three equal parts. Screw insertion portions 51 are formed at the positions, and holes 52 are formed in these screw insertion portions 51. A hole 53 and a pair of arc-shaped holes 54 centering on the center O of the hole 53 are formed in the center of the circular recess 50. The arcuate hole 54 has an opening angle of 140 degrees. Further, on the lower surface portion of the bracket main body 49, an engaging projection 55 which is an engaging portion is formed at a position where the circumference is divided 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, the fixed side protruding from the upper surface of the housing 5 is fixed. The stopper-57 penetrates the circular arc-shaped hole 54 on the right side of the upper bracket 48 and projects into the circular recess 50.

Further, the support shaft 4 penetrates the hole 53 of the upper bracket 48 and the bush 58 provided in the support hole 18 of the housing 5, and the lower end portion of the support shaft 4 is the output shaft hole of the clutch plate 34. An E-ring 58 is fitted in a portion which is inserted into the clutch 39 and projects downward from the clutch plate 34. The flange 43 of the support shaft 4 is overlapped with the upper bracket 48, the support shaft side stopper 47 is inserted into the circular recess 50 of the upper bracket 48, and the engaging projection 55 is located in the engaging recess 44. They are engaged with each other, and these constitute the locking mechanism 80. The shaft portion 4a supported by the support hole 18 is liquid-tight by an O-ring 59.

Further, a flange cover 60 shown in FIGS. 21 to 23 is attached to the flange 43 of the support shaft 4. 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 an annular projection 62 is formed on the upper peripheral portion of these holes 61. The peripheral portion 60b of the flange cover 60 holds down the O-ring 65 inserted into the O-ring insertion portion 63 formed by the upper surface of the housing 5 and the O-ring insertion portion 63 of the peripheral portion of the upper bracket 48, and the housing 5 The liquid tightness between the upper bracket 48 and the upper bracket 48 is maintained.

As shown in FIG. 9, the switch mechanism 30 includes a switch assembly 66. The switch assembly 66 is turned on and off by a pattern contact with an external switch portion 68 by rotation of an inner switch portion 67. The outer switch portion 68 has a plurality of mounting leg portions 69 formed on the peripheral portion thereof, and the mounting leg portions 69 have holes 70 formed therein.

In the switch assembly 66, the mounting leg portion 69 of the switch mounting portion 71 of the housing 5 is inserted into the hole 67 a of the inner switch portion 67 while the intermediate portion of the support shaft 4 is inserted and engaged. It is inserted into the mounting leg insertion portion 72 at the lower end portion, and the projection 73 provided on the mounting leg insertion portion 72 is inserted into the hole 70 of the mounting leg portion 69 to be mounted on the housing 5.

The thrust washer 75 is in contact with the external switch portion 68 of the switch assembly 66 via the washer 74, and the spring 29 is interposed between the thrust washer 75 and the driven gear 35. The washer 74 has a lock hole 74a in 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 stem-2 is fixed to the upper surface of the flange cover 60.

That is, the stud bolts 76 are planted on the upper surface of the flange 43 of the support shaft 4, and these stud bolts 76 project upward from the holes 61 of the flange cover 60, and the flange cover 60 is provided. The base member 75A is placed on the base plate 60, the stud bolt 76 is inserted into the hole 77 formed in the base member 75A, and the nut member 78 is tightened to attach the base member 75 to the support shaft 4. In this case, the base member 75 is used to crush the annular projection 62 formed on the flange cover 60 for waterproofing.

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

When the drive motor 19 is driven, after the output shaft 22 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 rotates 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 as shown in (a) and (b) of FIG. 24, and the lower bracket 33. Rolls on the surface portion 33a of. At the same time, 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, and the steering wheel-2 rotates. Then, before the storage position, the ball 42 moves down the inclined surface 38c of the recess 38, so that the support shaft 4 descends so that the locking projection 55 comes into contact with the lower surface 43a of the flange 43 and rotates while rubbing. Stop at the storage position in c). In this state, outside mirror-1 is stored. Therefore, when the ball 42 is inserted into the recess 38 and is stored, the engagement projection 55 of the locking mechanism 80 is brought into sliding contact with the surface portion 43a of the upper bracket 43, so that the frictional force due to the sliding contact is also provided during storage. Yes, Outside Mira-1 is retained. Therefore, it is possible to eliminate the rattling of the outside mirror-1 that occurs during storage.

Further, as shown in FIG. 25, by changing the position or angle of the inclined surface 38c of the recess 38 of the lower bracket 33 to a, b, c, the sliding starts slowly in the state of a. In the state of b, it can be slid earlier, and in the state of c, it can be slid later, and a holding force can be produced at each position.

[0034]

[Effect of the device]

 As described above, the present invention provides a drive assembly including a drive motor and a reduction mechanism provided on the output side of the drive motor in the main body of the apparatus, and a drive assembly of the drive assembly. And a support shaft assembly that rotates the support shaft by releasing the lock by the locking mechanism by pushing the support shaft against the spring by driving the clutch mechanism to drive the support shaft. The engaging portions formed on the upper surface of the upper bracket are releasably engaged with the plurality of engaging portions formed on the lower surface of the flange of, and one of these engaging portions is formed into the engaging concave portion. The other is configured as an engaging protrusion, and the clutch mechanism is formed with a plurality of recesses on the upper surface of the lower bracket fixed to the apparatus main body, and a plurality of balls are formed on the lower surface of the clutch plate fixed to the support shaft. Formed with a ball fitting recess and rotatably fitted into the ball fitting recess. -The clutch mechanism and the locking mechanism are formed by inserting the ball into the recess, and when the ball is inserted into the recess, the engaging projection of the locking mechanism causes Since it is set to slide on the surface, the engaging projection of the locking mechanism slides on the surface of the part where the engaging recess is formed when the ball is inserted into the recess. Even at, there is a frictional force due to sliding contact, and the outside mirror is retained. Therefore, it is possible to eliminate the rattling of outside mirrors that occurs during storage.

[Brief description of drawings]

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

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.

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

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

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

FIG. 6 is a vertical cross-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 in the drive system.

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

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 the flange cover.

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

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

FIG. 24A is an explanatory diagram illustrating a relationship between the clutch mechanism and the locking mechanism at the time of reset. (B) is an explanatory view for explaining the relationship between the clutch mechanism and the locking mechanism in operation. (C) is an explanatory view for explaining the relationship between the clutch mechanism and the locking mechanism during storage.

FIG. 25 is a development view showing the difference in the position and angle of the inclined portion of the concave portion of the clutch mechanism.

FIG. 26 is a conventional electric retractable outside mirror for a vehicle.
FIG. 3 is a vertical cross-sectional view of the driving device of FIG.

FIG. 27 is an explanatory diagram illustrating a relationship between a clutch mechanism and a locking mechanism of the drive system.

[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

Claims (1)

[Scope of utility model registration request] 1. A drive assembly having a drive motor and a speed reduction mechanism provided on the output side of the drive motor in a main body of the apparatus, and a clutch mechanism driven by the drive assembly. A support shaft assembly that is activated to push up the support shaft against the spring to release the lock by the locking mechanism and rotate the support shaft, and the locking mechanism is formed on the lower surface of the flange of the support shaft. The plurality of engaging portions are engaged with the plurality of engaging portions formed on the upper surface of the upper bracket in a disengageable manner, and one of the engaging portions serves as an engaging recess and the other serves as an engaging protrusion. In addition, the clutch mechanism is formed with a plurality of recesses on the upper surface of the lower bracket fixed to the apparatus main body, and with a plurality of ball fitting recesses on the lower surface of the clutch plate fixed to the support shaft. -Insert a ball that is rotatably fitted in the And the clutch mechanism and the locking mechanism are set in such a positional relationship that the engaging projections of the locking mechanism are in sliding contact with the surface of the portion where the engaging concave portion is formed when the ball is inserted into the concave portion and stored. A drive device for an electric retractable outside mirror for a vehicle characterized by the above.