JP3627375B2 - Braking force applying mechanism for vehicle outer mirror device - Google Patents

Description

[0001]
[Industrial application fields]
In the present invention, a bearing portion is formed in a housing fixed to a vehicle body, and a rotation shaft is supported on the bearing portion. The rotation shaft is mounted with a flange portion that carries an outer mirror and a rotation transmission gear that transmits a rotation transmission force. The present invention relates to an improvement in an outer mirror device for a vehicle having a shaft portion that is rotated between a use position and a storage position and that is biased in a direction in which a flange portion is pressed against a bearing portion.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in a vehicle outer mirror device, a bearing portion is formed on a housing fixed to a vehicle body, and a rotating shaft is supported on the bearing portion. The rotating shaft has a rotational transmission force with a flange portion that carries an outer mirror. A shaft portion having a rotation transmission gear for transmission is provided, and the shaft portion is rotated between the use position and the storage position, and the flange portion is biased in a direction in which it is pressed against the bearing portion. Are known.
[0003]
In this outer mirror device for a vehicle, a sliding contact plate as a sliding contact member subjected to hard chrome plating for wear resistance is screwed to a flange portion of a rotating shaft, and a friction clutch plate having a friction material is fixed to a bearing portion. In addition, a braking force applying mechanism that applies a braking force to the rotating shaft by a pressure contact force of the flange portion to the bearing portion is provided, thereby preventing blurring of the outer mirror.
[0004]
[Problems to be solved by the invention]
However, since the braking force applying mechanism of the conventional outer mirror device has a structure in which the slidable contact plate that has been subjected to the hard chrome plating is screwed to the flange portion, the fixing is troublesome and the mounting takes time. There is an inconvenience. There is also a problem that the screw comes loose due to a change over time and the sliding contact plate becomes loose.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a braking force for an outer mirror device that can quickly and easily attach a sliding contact member to a rotating shaft with a simple structure. Provide mechanism.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, a braking force applying mechanism for an outer mirror device according to the present invention has a bearing portion formed on a housing fixed to a vehicle body, and a rotating shaft is supported on the bearing portion. It has a flange portion that carries a mirror and a shaft portion on which a rotation transmission gear for transmitting a rotation transmission force is mounted, and is rotated between a use position and a storage position, and the flange portion is connected to the bearing portion. In the vehicle outer mirror device urged in the press-contact direction, a friction clutch plate that applies a braking force to the rotating shaft is provided in the bearing portion, and the rotating shaft is in sliding contact with the friction clutch plate. The sliding contact member is composed of a facing plate portion facing the friction clutch plate and a press-fit cylinder portion press-fitted into the rotary shaft from the axial direction. And a gap wall portion providing a gap between said shaft in order to alleviate the press-fitting force and press fitting wall portion in close contact with the rotating shaft. Preferably, one of the friction clutch plate and the facing plate portion of the sliding member is provided with a friction material, and the other is hard chrome plated. More preferably, the press-fitting wall portions and the gap wall portions are alternately formed in the direction around the axis of the rotary shaft, and the rotary shaft is formed with a knurl at a position where the press-fitting wall portion is in close contact.
[0007]
According to the present invention, the sliding contact member is press-fitted into the rotating shaft by inserting the sliding contact member into the rotating shaft from the axial direction of the rotating shaft. The sliding contact member is formed with a press-fitting cylinder portion, and the press-fitting cylinder portion is provided with a press-fitting wall portion and a gap wall portion. Therefore, when the sliding contact member is press-fitted into the rotary shaft, Since the deformation is allowed, the pressure input is relieved and the sliding contact member can be reliably press-fitted into the rotating shaft, and the sliding contact member is prevented from being cracked or cracked.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
[0009]
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1
In FIG. 1, reference numeral 1 denotes an upper housing incorporating a drive mechanism, 2 a lower housing, and 3 a rotating shaft. The rotating shaft 3 has a shaft portion 4 and a flange portion 5. The upper housing 1 is provided with a bearing portion 6, and 7 is a bearing hole through which the shaft portion 4 of the rotating shaft 3 is inserted. A screw insertion hole 8 is provided in the flange portion 5. The flange portion 5 is covered with a waterproof cover 9. A mounting flange 10 is fixed to the flange portion 5 by a screw member 11 through the cover 9, and a stay 12 carrying an outer mirror (not shown) is fixed to the mounting flange 10. An annular groove 13 is formed on the outer periphery of the bearing portion 6 and an engaging protrusion 14 is formed. An O-ring 15 is fitted into the annular groove 13, and a friction clutch plate 16 is fixed to the engagement protrusion 14. Reference numeral 16 ′ denotes a notch having a shape corresponding to the engagement protrusion 14.
[0010]
A washer 17, a rotating plate 18, a spring 19, a rotation transmission gear 20, and a clutch plate 21 are inserted into the shaft portion 4 of the rotating shaft 3. The rotating plate 18 is used to drive and stop a motor (not shown), and the rotating plate 18 has a rectangular insertion hole 18a and an engaging protrusion 18b. A limit switch 22 is provided in the upper housing 1 so as to face the rotation area of the rotary plate 18. As shown in FIG. 2, the shaft portion 4 is formed with a corner portion 4 a that fits into the rectangular insertion hole 18 a at a protruding base portion that protrudes from the flange portion 5, and an oval cut portion 4 b at the tip portion. Is provided. The clutch plate 21 is provided with an oblong insertion hole 21a corresponding to the cut portion 4b. An engagement protrusion 21 b is formed on the upper surface of the clutch plate 21, and the engagement protrusion 21 b is engaged with an engagement recess (not shown) formed on the lower surface of the rotation transmission gear 20. A screw groove 22 is formed at the end of the shaft portion 4, and a nut 23 is screwed into the screw groove 22, and the washer 17, the rotating plate 18, the spring 19, the rotation transmission gear 20, and the clutch plate 21 are connected to the nut 23. It has been retained by.
[0011]
The rotating shaft 3 is urged by the urging force of the spring 19 in the direction in which the flange portion 5 is in close contact with the friction clutch plate 16. A sliding contact member 24 is interposed between the friction clutch plate 16 and the flange portion 5 of the rotary shaft 3. The sliding contact member 24 has a facing plate portion 24 a that faces the friction clutch plate 16 and a press-fit cylinder portion 24 b that is press-fitted into the rotary shaft 3. The sliding contact member 24 is subjected to a high wear resistance surface treatment, for example, a hard chrome plating treatment for wear resistance. As shown in FIG. 3 in an enlarged manner, the friction clutch plate 16 is provided with a friction material plate 16a that gives a frictional force to the facing plate portion 24a by baking. The press-fit cylinder portion 24b has a linear press-fit wall portion 24c that is in close contact with the rotary shaft 3, and a curved gap wall portion 24d that relieves pressure input. The press-fitting wall portions 24c and the gap wall portions 24d are alternately formed in the circumferential direction of the shaft portion 4 of the rotary shaft 3, and the press-fitting cylinder portion 24b has an approximately straight side portion and a curved corner portion. It presents a square prism. As shown in an enlarged view in FIG. 2, the flange portion 5 has a linear close-contact wall portion 5a that is in close contact with the press-fitting wall portion 24c and a curved opposing wall portion 5b that faces the gap wall portion 24d with a gap therebetween. The close wall 5a is formed with a knurl 5c that extends in the press-fitting direction in order to reduce press-fitting and absorb variations in the press-fitting allowance. The sliding contact member 24 is press-fitted into the flange portion 5, and when the sliding contact member 24 is press-fitted into the flange portion 5, a deformation force is applied in the direction of arrow F as shown in FIG. . Thereby, since the deformation | transformation of the press injection cylinder part 24b is accept | permitted, press input is relieve | moderated and the sliding contact member 24 is press-fitted in the flange part 5 reliably. Reference numeral 25 denotes an E-ring.
[0012]
The details of the operational relationship of the vehicle outer mirror device are not directly related to the present invention and will not be described. For example, refer to Japanese Patent Application No. 7-73505 if necessary.
[0013]
Second Embodiment of the Invention
In the second embodiment of the present invention, as shown in FIGS. 5 and 6, close wall portions 5a and opposing wall portions 5b are alternately formed on the protruding base portion of the shaft portion 4, and knurled 5c is formed on the close wall portion 5a. Since the remaining components are the same as those of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.
[0014]
According to the first and second embodiments of the present invention, the press-fitting cylinder portion 24b is constituted by the linear press-fitting wall portion and the curved gap wall portion, so that the rotation shaft 3 and the sliding contact member 24 can rotate together. Certainty can be achieved.
[0015]
As described above, in the first and second embodiments of the invention, the lorete 5c is formed on the close wall portion 5a, but the knurling 5c may not be provided. In the first and second embodiments, the friction material plate 16a is provided on the friction clutch plate 16. However, the friction clutch plate 16 is subjected to hard chrome plating, and the sliding member 24 is provided with the friction material plate 16a. May be provided. Further, in the first and second embodiments of the present invention, the gap H is formed at the corner portion of the substantially quadrangular press-fit cylinder portion 24b. It can also be set as the structure which gives the clearance gap H to the side part.
[0016]
The outer mirror device is not only electrically operated between the front storage position in front of the windshield and the set position, but also electrically operated between the rear storage position on the side of the vehicle and the set position. Is possible.
[0017]
【The invention's effect】
Since the braking force applying mechanism of the outer mirror device according to the present invention is configured as described above, the sliding contact member can be quickly and easily attached to the rotating shaft with a simple structure. When press-fitting into the rotating shaft, deformation of the press-fitting cylinder portion is allowed, so that the pressure input is relaxed and the sliding contact member can be securely pressed into the rotating shaft, and cracking and cracking of the sliding contact member are prevented.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing a schematic configuration of a vehicle outer mirror device according to a first embodiment of the invention.
2 is an exploded perspective view showing a positional relationship between a rotating shaft and a sliding contact member shown in FIG. 1. FIG.
3 is an enlarged perspective view showing the shape of the friction clutch plate shown in FIG. 1. FIG.
4 is a partial cross-sectional view showing a press-fitting relationship between a rotating shaft and a sliding contact member shown in FIG. 1, and is a view partially omitting a detailed shape of the rotating shaft.
FIG. 5 is an exploded perspective view showing a schematic configuration of a vehicle outer mirror device according to a second embodiment of the invention.
6 is an exploded perspective view showing the positional relationship between the rotating shaft and the sliding contact member shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Upper housing 3 ... Rotary shaft 4 ... Shaft part 5 ... Flange part 6 ... Bearing part 16 ... Friction clutch plate 20 ... Rotation transmission gear 24 ... Sliding contact member 24a ... Face-to-face plate part 24b ... Press-fit cylinder part 24c ... Press-fit wall part 24d: gap wall

Claims (4)

A bearing portion is formed in a housing fixed to the vehicle body, a rotating shaft is supported on the bearing portion, and the rotating shaft is a shaft portion on which a flange portion that carries an outer mirror and a rotation transmission gear that transmits a rotation transmission force are mounted. In the vehicle outer mirror device that is rotated between the use position and the storage position and is biased in a direction in which the flange portion is pressed against the bearing portion,
The bearing portion is provided with a friction clutch plate that applies a braking force to the rotating shaft, and the rotating shaft is provided with a sliding contact member that comes into sliding contact with the friction clutch plate, and the sliding contact member faces the friction clutch plate. It is composed of a facing plate part and a press-fit cylinder part that is press-fitted into the rotary shaft from the axial direction, and the press-fit cylinder part is between the press-fit wall part that is in close contact with the rotary shaft and the shaft in order to reduce pressure input. A braking force applying mechanism for an outer mirror device for a vehicle, which includes a gap wall portion that gives a gap to the vehicle. 2. The vehicle outer mirror device according to claim 1, wherein a friction material is provided on one of the friction clutch plate and the facing plate portion of the sliding contact member, and hard chrome plating is applied on the other. Power application mechanism. The braking force applying mechanism of the outer mirror device for a vehicle according to claim 1, wherein the press-fitting wall portions and the gap wall portions are alternately formed in a direction around the axis of the rotary shaft. The braking force application mechanism of the outer mirror device for a vehicle according to claim 1, wherein a knurling is formed at a location where the press-fitting wall portion is in close contact with the rotating shaft.

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