JP2573404Y2 - Clock gear support device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gear supporting device used for a timepiece machine body.

[0002]

2. Description of the Related Art Hitherto, a structure has been known in which a gear is supported by a support shaft protruding from a support plate (base plate) side. At this time, the gears have bearing holes at both ends of the shaft portion to which the support shaft provided on the support plate is fitted, but in the conventional gear, the two bearing holes are independent without communicating, or It had the same diameter as the diameter of the bearing part and penetrated the shaft part.

[0003]

In the prior art, when lubricating a bearing portion for obtaining smooth rotation, if the bearing portions are independent, it is necessary to lubricate each of two locations. Forget about lubrication. If the bearing holes are in communication but have the same diameter, lubrication of both bearings can be achieved by lubricating the bearing in one place, but there is backlash in the axial direction of the gear.
Has a problem that the size becomes larger.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a supporting device which can maintain the play of the gear in the axial direction small and can reduce the number of steps of lubricating the gear bearing.

[0005]

In order to achieve the above object, the present invention comprises a support shaft provided on two support plates facing each other and a gear rotatably supported by both support shafts. The gear has a bearing hole in which the two support shafts are fitted and a communication hole smaller in diameter than the bearing hole communicating the two bearing holes.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the present invention will be described below with reference to the preferred embodiments shown in the accompanying drawings.

In FIG. 1, support shafts 3 and 4 are provided opposite to each other on two support plates 1 and 2 facing each other. Gear 5 rotatably supported by support shafts 3 and 4
Are formed with bearing holes 6 and 7 in which the two support shafts 3 and 4 are fitted. The both bearing holes communicate with each other through a communication hole 8 having a small diameter. The diameter of the communication hole 8 is a pore sufficiently smaller than the bearing holes 6 and 7.

According to this configuration, when lubricating the bearing holes 6 and 7 for lubrication purposes, only lubricating one of the bearing holes 6 is required.
The oil reaches the other bearing hole 7 through a communication hole 8 communicating the two bearing holes 6 and 7 by capillary action. Therefore, the number of lubrication steps is reduced, and forgetting to lubricate one is also prevented. Further, since the communication hole 8 has a smaller diameter than the support shafts 3 and 4, the axial movement of the gear 5 can be performed in the same manner as in the related art.
Is regulated by the contact of the tips of the support shafts 3 and 4 with the bottom surface of. The above embodiment is an example in which the present invention is applied to a normal gear constituting a wheel train of a timepiece. However, the present invention can of course be applied to a rotor constituting a small timepiece motor.

[0009]

According to the structure of the present invention, the number of lubricating points for lubricating the bearing portion of the gear can be reduced, and forgetting to lubricate one of the gears can be prevented. Further, since the communication hole is a hole having a smaller diameter than the support shaft, it is possible to restrict the movement of the gear in the axial direction as in the related art.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a support structure of a timepiece gear.

[Explanation of symbols]

 1, 2 support plate 3, 4 support shaft 5 gear 6, 7 bearing hole 8 communication hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A vehicle comprising: two support plates facing each other; a support shaft provided on the support plate; and a gear rotatably supported by the two support shafts. A timepiece gear supporting device, wherein a bearing hole in which a shaft is fitted and a communication hole smaller in diameter than the bearing hole communicating the two bearing holes are formed.