JP3901522B2 - Lubricating oil lubrication jig - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a lubrication jig for a fluid bearing that fills the bearing with lubricating oil in a fluid bearing manufacturing apparatus, and is particularly suitable for mass production.
[0002]
[Prior art]
Conventionally, when manufacturing a fluid dynamic bearing, the work of injecting and filling lubricating oil into the bearing unit is to seal one of the openings of the bearing unit with a cap or the like and place it in a vacuum atmosphere to vent the air in the bearing unit. After the other opening was immersed in the lubricating oil, the lubricating oil was injected by returning the atmosphere to atmospheric pressure.
[0003]
Hereinafter, a conventional method for lubricating a fluid dynamic bearing will be described.
As shown in FIG. 4, when injecting the lubricating oil 21, a cap 23 is disposed in one end opening 22 a of the bearing unit 22, and a screw hole 24 a provided in the end of the shaft body 24 is used to screw 25, the cap 23 is tightened and the opening 22a is sealed. Further, by making the atmosphere 26 into a vacuum environment, the air in the bearing unit 22 is evacuated, the other end opening 22b of the bearing unit 22 that is not sealed is immersed in a tank 27 containing the lubricating oil 21 , and gradually By returning the atmosphere 26 to atmospheric pressure, the lubricating oil 21 was drawn into the bearing unit 22 and lubricated.
[0004]
[Problems to be solved by the invention]
However, the above-described lubrication method requires the work of attaching the caps 23 to the respective bearing units 22 one by one, and the mounting work of the caps 23 has a problem that the production efficiency is remarkably deteriorated.
[0005]
In addition, it is difficult to attach the cap 23 to a product in which the shaft body 24 of the openings 22a and 22b of the shaft body unit 22 has no screw holes, and this lubrication method cannot be adopted. There were significant restrictions.
[0006]
An object of the present invention is to solve the above-mentioned problems and to provide a lubrication jig for a fluid bearing capable of greatly improving production efficiency without being limited to a product shape.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention closes the one end opening in a bearing unit having openings communicated with each other at both ends in a vacuum atmosphere and immerses the other end opening in lubricating oil. plurality, and by returning the atmosphere to atmospheric pressure, to hold the second end opening to a lubrication tool of the fluid bearing to fill the lubricant in the bearing unit, the bearing unit in the upper and lower directions a receiving plate having a bearing holding portion, a plurality of sealing portions having a ring-shaped sealing member for the opening at one end for sealing each of the bearing unit, retainer plate and disposed facing above the bearing holder comprising a said received while holding the bearing unit to the plate, by pressing the receiving plate at the pressing plate, the sea to the one end opening The one end opening of the bearing unit member is pressed is intended to be sealed.
[0008]
According to the above configuration, the plurality of bearing units are held by the bearing holding portion of the receiving plate, the holding plate is disposed on the receiving plate, and the one end opening is sealed by the sealing portion. It is possible to lubricate at the same time, the time required for the lubrication work can be shortened, and the production efficiency can be greatly improved.
[0009]
According to a second aspect of the present invention, in the configuration according to the first aspect, the sealing portion of the pressing plate includes a concave portion into which the one end opening of the bearing can be inserted, and a seal member disposed at the back of the concave portion. It has been done.
[0010]
According to the said structure, even if there is no screw hole which faces an opening part, it can seal easily by the recessed part of a pressing plate, and is not restrict | limited to the product shape of a bearing unit. Moreover, the conventional cap mounting operation is not required, and the production efficiency can be further improved.
[0011]
According to a third aspect of the present invention, in the configuration according to the first or second aspect, a locking convex portion is formed on the side surface of the bearing unit, and a through hole into which the bearing unit can be inserted into the bearing holding portion of the receiving plate; A locking portion capable of supporting the locking convex portion of the bearing unit is formed in the through hole, and a sealing plate is provided by installing a pressing plate on the receiving plate holding the bearing unit in the bearing holding portion. The bearing unit is configured to be held in a state where the one end opening of the bearing unit is sealed.
[0012]
According to the above configuration, the bearing unit can be easily supported from below by the locking portion of the through hole by forming the locking convex portion including the flange portion or the step portion on the bearing unit. The time required for the work can be shortened and the production efficiency can be improved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the hydrodynamic bearing according to the present invention will be described below with reference to FIGS.
[0014]
The bearing unit 1 has openings 1a and 1b communicating with each other at both upper and lower ends of a cylindrical body 1c, and a locking collar (locking protrusion) on the outer periphery of the intermediate position of the body 1c. Part) 1d is formed.
[0015]
The lubrication jig includes a receiving plate 2 having a plurality of bearing holding portions 3 for holding the bearing unit 1 and a plurality of sealed portions that are arranged on the receiving plate 2 and seal the upper end opening 1 a of the bearing unit 1. And a holding plate 4 having 5.
[0016]
The bearing holding portion 3 of the receiving plate 2 is formed with a plurality of through holes 6 at a predetermined pitch. The through holes 6 have a large diameter portion 6a into which the flange portion 1d can be inserted and accommodated on the upper surface side, and an intermediate portion. A step portion (locking portion) 6b for locking the flange portion 1d and a small-diameter portion 6c into which the lower body portion 1c can be inserted on the lower surface side are formed.
[0017]
The sealing portion 5 of the presser plate 4 is formed with a ring seal made of a recess 7 formed so as to face the bearing holding portion 3 and into which the upper body portion 1c can be inserted, and rubber or the like disposed on the bottom surface of the recess 7 (Seal member) 8.
[0018]
The operation of injecting the lubricating oil 9 into the bearing unit 2 using the lubrication jig is performed by inserting the bearing unit 1 into the bearing holding portion 3 of the receiving plate 2 and then holding the pressing plate 4 above the receiving plate 2. For example, by pressing by means of pressing jigs (not shown) arranged at the four corner positions, the upper end of each bearing unit 1 is inserted into the recess 7 and the ring seal 8 is pressed against the upper end opening 1a and sealed, The bearing unit 1, the receiving plate 2, and the holding plate 4 are integrated.
[0019]
An integrated said member, at least the atmosphere is arranged in an adjustable eg vacuum chamber 10 in the range of atmospheric pressure from the vacuum, by the atmosphere 10a of the vacuum chamber 10 in a vacuum environment, in the bearing unit 1 Remove air. Then, the lower end opening 1b that is not sealed is immersed in the lubricating oil 9 in the oil tank 11, the atmosphere 10a of the vacuum chamber 10 is gradually returned to atmospheric pressure, and the lubricating oil 9 is sucked into the bearing unit 1. Fill with lubricating oil 9.
[0020]
According to the said embodiment, by using the receiving plate 2 and the presser plate 4, the some bearing unit 1 can be lubricated simultaneously, and production efficiency can be improved significantly.
[0021]
Moreover, since the recessed part 7 which has the ring seal 8 was formed in the sealing part 5 of the holding | suppressing plate 4, the screw hole for fixing a cap etc. to the opening part to seal is unnecessary, and is limited to the product shape of the bearing unit 1. In addition, since it is not necessary to attach a cap or the like to the upper end opening 1a as in the prior art, the production efficiency can be greatly improved.
[0022]
Further, by forming the flange portion 1d on the body portion 1c of the bearing unit 1, the bearing unit 1 can be easily held in the step portion 6b formed in the through hole 6 of the receiving plate 2, and the production efficiency is improved. Can do.
[0023]
In the above-described embodiment, the flange portion 1d is formed as the locking convex portion, but it may be configured by a stepped portion, a plurality of protrusions, or the like. Moreover, although the step part 6b was formed in the through-hole 6 as a latching part, you may comprise by a ring-shaped convex part.
[0024]
【The invention's effect】
As described above, according to the first aspect of the present invention, the plurality of bearing units are held by the bearing holding portion of the receiving plate, the pressing plate is arranged on the receiving plate, and the one end opening is sealed by the sealing portion. Therefore, it is possible to simultaneously lubricate a plurality of bearing units at a time, the time required for the lubrication work can be shortened, and the production efficiency can be greatly improved.
[0025]
According to the second aspect of the present invention, even if there is no screw hole facing the opening, it can be easily sealed by the recess of the pressing plate, and the product shape of the bearing unit is not limited. Moreover, the conventional cap mounting operation is not required, and the production efficiency can be further improved.
[0026]
According to the third aspect of the present invention, the bearing unit is easily supported from below by the latching portion of the through hole by forming the latching convex portion including a flange portion or a stepped portion on the bearing unit. It is possible to reduce the time required for the lubrication work and improve the production efficiency.
[Brief description of the drawings]
1A and 1B show an embodiment of an oiling jig for a fluid dynamic bearing according to the present invention, wherein FIG. 1A is an exploded side sectional view before integration, and FIG. 1B is a side sectional view in an integrated state.
FIG. 2 is a partially enlarged cross-sectional view of a main part of the oil supply jig.
3A is a bottom view showing a holding plate of the oiling jig, and FIG. 3B is a plan view of a receiving plate.
FIG. 4 is a side cross-sectional view showing an oiling jig for a conventional fluid dynamic bearing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Bearing unit 1a, 1b Opening part 1c trunk | drum 1d collar 2 receiving plate 3 bearing holding part 4 holding plate 5 sealing part 6 through-hole 6a large diameter part 6b step part 6c small diameter part 7 recessed part 8 ring seal 9 lubricating oil 10 vacuum Chamber 10a Atmosphere 11 Oil tank

Claims (3)

In a vacuum atmosphere, by closing the one end opening in the bearing unit having openings communicated with each other at both ends, the other end opening is immersed in lubricating oil, and the atmosphere is returned to atmospheric pressure. , a lubricating jig of the fluid bearing to fill the lubricant in the bearing unit from the other end opening,
A receiving plate having a plurality of bearing holder that holds the bearing unit in the upper and lower directions, a plurality of sealing portions having a ring-shaped sealing member for the opening at one end for sealing each of the bearing unit, the bearing A holding plate disposed oppositely above the holding portion ;
With the bearing unit held on the receiving plate, the sealing plate is pressed against the one end opening by pressing the receiving plate with the pressing plate, and the one end opening of the bearing unit is sealed. An oil lubrication jig for a fluid dynamic bearing. Closure of the pressing plate has a recess for the one end opening allows insertion of the bearing, the fluid bearing according to claim 1, characterized in that it is constituted by the said sealing member disposed in the inner part of the recess Lubrication jig. A locking projection is formed on the side surface of the bearing unit,
A through hole into which the bearing unit can be inserted and a locking portion capable of supporting the locking convex portion of the bearing unit within the through hole are formed in the bearing holding portion of the receiving plate,
The holding unit is configured to hold the bearing unit in a state where one end opening of the bearing unit is sealed by the sealing portion by installing a pressing plate on the receiving plate holding the bearing unit in the bearing holding portion. An oiling jig for a fluid dynamic bearing according to claim 1 or 2.

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