JPH0637007Y2 - Automotive mirror device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mirror device for an automobile, and more particularly, to a frame for supporting a mirror horizontally rotating with respect to a base fixed to a door or a Funtund fender. The present invention relates to an automobile mirror device.

[Prior art]

The applicant of the present application proposed the mirror device for automobile shown in FIG. 5 in Japanese Patent Application No. 60-106892. In the vehicle mirror device shown in FIG. 5, a plate 2 is fixed to a base 1 fixed to a door or a front fender (not shown), and a shaft portion 2a is integrally hung on the plate 2. Further, a ring gear 3, an internal gear 4 and a rotor 5, which form a planetary gear mechanism, are attached to the shaft portion 2a,
A frame 7 for supporting the mirror 6 is assembled at its boss portion 7a. The ring gear 3 has an inner tooth 3a and is rotatably mounted on the shaft portion 2a, and its rotation is restricted by a friction engagement means composed of a friction plate 8, a disc spring 9 and a nut 10. , It is designed to rotate only when a turning force of a set value or more is applied. The internal gear 4 has external teeth 4a and is rotatably assembled on the lower end eccentric shaft portion 5a of the rotor 5, and the rotation of the rotor 5 causes the external teeth 4a and the internal teeth 3a of the ring gear 3 to rotate. It is eccentrically moved so that the meshing position sequentially moves in the circumferential direction. A projection 7b provided on the frame 7 is engaged with the internal gear 4 so as to be movable in the radial direction and integrally rotatable in the circumferential direction. The rotor 5 has teeth on the upper circumference.
5b is rotatably mounted on the shaft 2a and has teeth
An opening provided in the boss portion 7a of the frame 7 at 5b (not shown)
Through the worm 11. The worm 11 is integrally provided on the rotary shaft 12a of the electric motor 12 assembled to the frame 7, and the rotor 5 is rotated according to the rotation of the rotary shaft 12a.
To rotate.

Further, the frame 7 is rotatably assembled on the rotor 5 at its boss portion 7a, and the frame 7 and the rotor 5 are spring-loaded.
Axial movement is restricted by 13 and nuts 14. A detent mechanism including a ball 15, a spring 16 and the like is interposed between the base 1 and the frame 7.

In the automobile mirror device configured as described above, the electric motor 12 is driven by a remote operation from the vehicle interior to rotate the rotary shaft.
When 12a rotates, the rotor 5 is rotated via the worm 11, and the eccentric shaft portion 5a of the rotor 5 causes the internal gear 4 to move eccentrically, so that the external teeth 4a of the internal gear 4 and the internal teeth of the ring gear 3 are rotated. 3a
The meshing position of is sequentially moved in the circumferential direction. Thus, when the rotor 5 makes one revolution, the internal gear 4 rotates in the direction opposite to the rotation direction of the rotor 5 with respect to the ring gear 3 by the difference in the number of teeth of the outer teeth 4a and the inner teeth 3a. This rotation is transmitted from the internal gear 4 to the frame 7 via the protrusion 7b, so that the frame 7 is attached to the base 1
Rotate against. Therefore, in the mirror device, the frame 7 rotates with respect to the base 1 at a rotational speed determined by the rotational speed of the rotor 5 and the difference in the number of teeth 3a, 4a.

[Problems to be solved by the invention]

As is clear from the above description, in the vehicle mirror device shown in FIG. 5, the shaft portion 2a, the ring gear 3, the internal gear 4, the rotor 5, the boss portion 7a, etc. are arranged coaxially. Therefore, although it is compact, the boss portion 7a of the frame 7 is rotatably mounted on the rotor 5 rotatably mounted on the shaft portion 2a. Therefore, the rotor 5 is not mounted between the shaft portion 2a and the boss portion 7a.
A gap for ensuring the rotation of the shaft portion 2a and a gap for ensuring the rotation of the boss portion 7a on the rotor 5 are present, and the amount of backlash of the frame 7 held increases. When the rotor 5 rotates, the shaft portion 2a and the rotor 5 are in sliding contact with each other at the rotation speed of the rotor 5, and the rotor 5 and the boss portion 7a are at a speed that is the sum of the rotation speed of the rotor 5 and the rotation speed of the frame 7. Since they are in sliding contact, the above-mentioned gaps are increased due to the wear caused by each sliding contact, and the amount of backlash of the frame 7 is increased.

Further, in this automobile mirror device, the frame 7
However, it is difficult to increase the support rigidity of the frame 7 because it is supported by the base 1 only at one position of the boss 7a.

The above-mentioned problem similarly occurs in the automobile mirror device in which the shaft portion 2a is provided integrally with the frame and the boss portion 7a is provided integrally with the base, and the ring gear 3 does not have the boss portion. The same also occurs in a mirror device for an automobile in which the internal gear 4 is engaged with the member having the shaft portion and the internal gear 4 is engaged with the member having the shaft portion.

[Means for solving problems]

The present invention has been made to solve the above-mentioned problems, and the vehicle mirror device is mounted either on a base fixed to a door or a front fender or a frame mounted on the base and supporting the mirror. The upper and lower cylindrical parts of the shaft that are integrally hung on the upper and lower cylindrical parts are respectively rotatably cylindrically fitted with the upper and lower integrated boss parts provided integrally with the other member, and the ring gear having the inner teeth and the outer An internal gear having teeth and a rotor for sequentially eccentrically moving one of the gears toward the other gear in order to sequentially move the meshing position of the external tooth and the internal tooth in the circumferential direction are provided, and the rotor is rotated to rotate the rotor. A planetary gear mechanism configured to relatively rotate the both gears in the circumferential direction by the difference in the number of teeth of the outer teeth and the inner teeth is coaxially assembled to the intermediate portion of the shaft portion, and one of the planetary gear mechanisms is used. The gear through the frictional engagement means to the base or frame causes rotatably engaged, and a structure formed by integrally allowed rotatably engaged with the other gear in the circumferential direction on the frame or base.

[Function and effect of device]

In a mirror device for an automobile according to the present invention, a pair of upper and lower bosses are rotatably fitted into an upper cylindrical portion and a lower cylindrical portion of a shaft, respectively, and a ring gear, an internal gear, a rotor, etc. are provided in an intermediate portion of the shaft. Since the planetary gear mechanism consisting of is coaxially assembled, the shaft portion, the boss portion, the planetary gear mechanism, etc. are coaxially arranged, and it is of course compact, and between the shaft portion and the boss portion. Since there is only a gap that ensures rotation of the boss on the shaft, the amount of backlash of the frame is small. Further, since the shaft portion and the boss portion are in sliding contact with each other at a low speed decelerated by the planetary gear mechanism, wear due to the sliding contact is extremely small and the amount of backlash of the frame hardly increases. In addition, the upper cylinder part and the lower cylinder part of the shaft part that can be reduced in diameter slide with the fitting part of the boss part, and the diameter from the center of the shaft to the sliding surface can be reduced, and the rotational friction resistance can be reduced. , It can be rotated accurately with a small rotating force. Further, since the fitting portion of the shaft portion and the boss portion, that is, the support portion is located at two upper and lower positions, the distance between the support portions can be maximized in a predetermined space, and the support rigidity of the frame to the base is significantly improved. can do.

In addition, since a pair of upper and lower boss portions are cylindrically fitted to the upper and lower cylindrical portions of the shaft portion, the shapes of the shaft portion and the boss portion are both cylindrical and inexpensive to form. In addition, the sliding resistance at the fitting portion is small and the frame can be rotated with a small turning force.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

In FIGS. 1 and 2, the base 20 is fixed to a door (or a front fender) not shown, and is formed in an L shape as shown in FIG. A plate 21 is fixed to the base 20, and a cylindrical support shaft 22 is fixed to the plate 21 by caulking at its lower end. Support shaft
A ring gear 23, an internal gear 24, and a rotor 25, which form a planetary gear mechanism, are mounted on the 22 and a frame 27 that supports a mirror 26 is also mounted.

The ring gear 23 has inner teeth 23a and is rotatably assembled on the support shaft 22, and has a pair of plates 28 and 29 and a retaining ring 3.
The rotation thereof is restricted by a friction engagement means composed of 0, a disc spring 31, and a nut 32, and the rotation is made only when a turning force of a set value or more acts. The lower plate 28 is made of a material having a low coefficient of friction, is non-rotatably attached to a notch 22a extending in the axial direction provided in the support shaft 22, and is restricted from moving downward by a retaining ring 30. The upper plate 29 is made of a material having a high coefficient of friction, and supports the support shaft 22.
It is attached to the notch 22a so as to be axially movable and non-rotatable. The disc spring 31 is attached to the support shaft 22 so as to be movable in the axial direction, and is a nut screwed to the threaded portion of the support shaft 22.
The spring force is adjusted by 32.

The internal gear 24 has outer teeth 24a and is rotatably assembled with the rotor 25 on the support shaft 22, and when the rotor 25 rotates, the eccentric shaft portion 25a of the rotor 25 and the outer teeth 24a and the ring gear. Eccentric movement is performed so that the meshing position of 23 with the internal tooth 23a moves sequentially in the circumferential direction. In addition, the internal gear 24 has a protrusion 24b.
And the protrusion 24b is a recess 27a provided in the frame 27.
Are engaged with each other so as to be movable in the radial direction and integrally rotatable in the circumferential direction. A thrust plate 33 is interposed between the lower end of the internal gear 24 and the step portion of the rotor 25.

The rotor 25 is rotatably assembled on the support shaft 22 between the stepped bush 34 fixed by press fitting to the lower boss portion 27b of the frame 27 and the thrust plate 35 assembled on the support shaft 22, and is rotatably mounted on the lower part. It integrally has a wheel 25b that engages with the worm 36. The worm 36 is integrally fixed on the rotary shaft 37a of the electric motor 37 assembled to the frame 27,
It engages with the wheel 25b through an opening 27c provided in the frame 27.

The frame 27 includes an outer frame 27A that supports the frame 26, an inner frame 27B whose door side end faces the base 20, and an inner frame cover 27C that houses the planetary gear mechanism and the friction engagement means described above.
The outer frame 27A, the inner frame 27B and the inner frame cover 27C are integrally connected. Further, the frame 27 is a boss portion 27b of the inner frame 27B.
A bush that is rotatably fitted into the lower cylindrical portion of the support shaft 22 via the stepped bush 34 and is press-fitted into the inner hole of the upper boss portion 27d provided in the inner frame cover 27C. A spring 41, which is rotatably cylindrically fitted to the upper cylindrical portion of the support shaft 22 via 38, and biases the ball 40.
Is urged upward by the thrust plate 42 and nut
It is locked by 43. The ball 40 and the spring 41 are connected to the frame 2 by the recess 21a provided in the plate 21.
A detent mechanism for fixing the 7 to the base 20 at a position shown in FIG. 4 (a position where the solid line extends in the drawing, or a storage position in front of or behind the imaginary line) with a moderation feeling is configured. As shown in FIG. 3, the upper part of the end of the frame 27 on the door side has a notched shape and is separated from the base 20 by a predetermined amount to reduce wind noise during running and rain drops on the side glass. The removal effect is being obtained.

In the automobile mirror device configured as described above,
When the electric motor 37 is driven by remote control from the passenger compartment to rotate the rotating shaft 37a, the rotor 25 is rotated via the worm 36, and the eccentric shaft portion 25a of the rotor 25 eccentrically moves the internal gear 24. Thus, the meshing positions of the outer teeth 24a of the internal gear 24 and the inner teeth 23a of the ring gear 23 sequentially move in the circumferential direction. Thus, when the rotor 25 makes one revolution, the internal gear 24 rotates relative to the ring gear 23 in the direction opposite to the rotational direction of the rotor 25 by the difference in the number of teeth between the outer teeth 24a and the inner teeth 23a. This rotation is the internal gear 24
Is transmitted to the frame 27 via the protrusion 24b, the frame 27 rotates with respect to the base 20. Therefore, in the mirror device, the rotation speed of the rotor 25 and the teeth 23a, 24
The frame 27 rotates with respect to the base 20 at a rotation speed determined by the tooth difference of a.

By the way, in the above embodiment, a pair of upper and lower boss portions 27b, 27d are rotatably cylindrically fitted to the upper column portion and the lower column portion of the support shaft 22, respectively, and the ring gear 23 and the inner contact portion are provided in the middle portion of the support shaft 22. Planetary gear mechanism consisting of gear 24, rotor 25, etc. and a pair of plates 28/29, retaining ring 30, disc spring 31, nut 3
Since the frictional engagement means composed of 2 etc. is coaxially assembled, it goes without saying that the support shaft 22, the boss portions 27b and 27d of the frame 27, the planetary gear mechanism, etc. are coaxially arranged and are compact. That is, the boss portion 27 is provided between the support shaft 22 and the boss portions 27b and 27d.
Since there is only a gap for ensuring the rotation of b and 27d on the support shaft 22, the amount of backlash of the frame 27 is small.
Further, since the support shaft 22 and the boss portions 27b and 27d are in sliding contact with each other at a slow speed reduced by the planetary gear mechanism, the abrasion due to the sliding contact is extremely small and the amount of backlash of the frame 27 is hardly increased. Further, the support shaft 22 is configured to slide on the upper and lower cylindrical portions of the support shaft 22 that can be reduced in diameter by the fitting portion of the boss portions 27b and 27d, and the diameter from the shaft center to the sliding surface can be reduced, and the rotational friction can be reduced. The resistance can be reduced, and it can be rotated accurately with a small rotational force. Further, since the fitting portions between the support shaft 22 and the boss portions 27b and 27d, that is, the support portions are at two upper and lower locations, the distance between the support portions can be maximized in a predetermined space, and the support rigidity of the frame to the base can be increased. Can be greatly improved.

Further, since a pair of upper and lower boss portions 27b and 27d are cylindrically fitted to the upper column portion and the lower column portion of the support shaft 22, respectively, the support shaft 22 and the boss portions 27b and 27d are both formed in a cylindrical shape. It has a shape and can be formed at low cost, and the sliding resistance at the fitting portion is small, so that the frame 27 can be rotated with a small turning force.

Further, in the above embodiment, each member of the planetary gear mechanism and the friction engagement means is housed in the closed space R formed by the inner frame 27B of the frame 27 and the inner frame cover 27C, and rainwater, Since it is protected from dust etc., each function can be stably obtained for a long period of time.

[Modification]

In the above-described embodiment, the present invention is applied to an automobile mirror device in which the support shaft 22 is integrally provided on the base 20 and the boss portions 27b and 27d are integrally provided on the frame 27. The present invention can also be implemented in an automobile mirror device that is integrally provided and the boss is integrally provided on the base.

Further, in the above embodiment, the ring gear 23 of the planetary gear mechanism is engaged with the support shaft 22 through the friction engagement means and the inscribed gear 24 is engaged with the frame 27 to implement the present invention. It is also possible to implement the present invention by engaging with the frame side and the internal gear with the base side.

[Brief description of drawings]

1 to 4 are views showing an embodiment of the present invention,
1 is a longitudinal sectional view of an essential part taken along the line II of FIG. 2, FIG. 2 is a lateral sectional view of the essential part taken along the line II-II of FIG. 1, and FIG.
An overall view of the vehicle mirror device shown in FIGS.
FIG. 4 is a plan view of the same. Further, FIG. 5 is a longitudinal sectional view of an essential part of an automobile mirror device according to the prior application of the present invention. Explanation of symbols 20 …… Base, 22 …… Support shaft (shaft part), 23 …… Ring gear, 23a …… Internal teeth, 24 …… Internal gear, 24a …… External teeth, 25…
… Rotor, 26 …… Mirror, 27 …… Frame, 27b, 27d…
… Boss part, 28,29 …… plate, 30 …… retaining ring, 31 ……
Belleville spring, 32 ... nut.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Ryoichi Fukumoto 2-1, Asahi-cho, Kariya city, Aichi Prefecture Aisin Seiki Co., Ltd. (56) Reference JP-A-60-131343 (JP, A) JP-A-58 -118354 (JP, A) JP-A 61-294296 (JP, A) Actually developed Shou 60-114044 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. An upper cylindrical portion and a lower cylindrical portion of a shaft portion integrally hung on either one of a base fixed to a door or a front fender or a frame mounted on the base and supporting a mirror. A pair of upper and lower boss portions integrally provided on the other member are rotatably cylindrically fitted, and a ring gear having internal teeth, an internal gear having external teeth, and a meshing position of the external teeth and internal teeth are provided. A rotor for sequentially eccentrically moving one of the gears toward the other gear in order to move the gears in the circumferential direction is provided, and the rotation of the rotor causes the gears to move in the circumferential direction by a difference in the number of teeth between the external teeth and the internal teeth. A planetary gear mechanism configured to rotate relative to each other is coaxially assembled to the intermediate portion of the shaft portion, and either gear of the planetary gear mechanism can be rotated to the base or the frame via friction engagement means. To With engaged, automotive mirror device comprising integrally allowed rotatably engaged with the other gear in the circumferential direction on the frame or base.