JPS6314156Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a micro-quantity lubrication device.

In recent years, there has been a remarkable increase in the rotational speed of machine tool spindles, and the so-called DM/
The n value (dm: average diameter of the bearing, n: rotational speed) used to be 300,000 to 400,000, but now it is required to exceed 800,000. However, the conventionally used grease has the disadvantage of deteriorating quickly, and when the dm/n value exceeds 800,000, problems arise such as temperature rise and torque increase, so grease lubrication cannot be used. In addition to this, forced lubrication and mist lubrication are also known, but when the dm·n value reaches about 800,000, there are various problems.

Against this background, in recent years, so-called fine-fixed oil quantity lubrication has come to be adopted in place of the above-mentioned lubrication system. An example of this will be explained based on Fig. 1: 10 is a solenoid valve, 12 is a timer, 14 is a pump, 16 is a tank with a float switch, 18 is a pressure switch, and 20 is a metering piston. A fine constant oil amount supply unit 22 is thus constructed. Air is sent to the unit 22 via an air filter 24. Also, a vinyl pipe 26 or the like is used for piping from the unit to the bearing 28.

Then, the lubricating oil taken out from the tank 16 by the action of the solenoid 10 and the pump 14 is supplied into the air stream in minute and fixed amounts by the action of the metering piston 20, and this air flow causes the pipe 26 to
carries the lubricating oil from the nozzle 30 to the bearing 28
It refuels.

The above-mentioned fine constant oil quantity lubrication device constantly applies a very small amount of lubricating oil of about 0.01 to 0.03 cc/30 minutes to the bearings 28.
Therefore, it is necessary that there be no oil leakage or oil accumulation in the path from the fine oil supply unit 22 to the bearing 28, and for this purpose, there should be no joints in the pipe. It is necessary to avoid as much as possible the pipe diameter changing during the process. However, conventional nozzle assemblies have not been able to meet these demands.

That is, as shown in FIG.
The lubricating oil flows from the oil hole 36 through the oil hole 40 of the spacer 38 and from the nozzle 30 to the bearing 28.
It is now being injected into the air.

However, since there is a gap between the spacer 38 and the housing 34, and there is also a difference in diameter between the oil hole 36 of the housing 34 and the oil hole 40 of the spacer 38, smooth flow of lubricating oil is prevented. There is a risk that the lubricating oil will leak around the spacer 38 because the lubricating oil will be obstructed by this part.

The present invention has been developed against the background of such circumstances, and aims to eliminate the drawbacks of the conventional example described above, namely, to prevent oil leakage during the course of supplying a minute amount of lubricating oil sent from a minute oil amount supply unit. The object of this invention is to provide a nozzle assembly for a lubricating device that can control the amount of lubricating oil that can be reliably supplied to a bearing or the like without causing any build-up or accumulation.

In order to achieve the above object, in the present invention, a minute and fixed amount of lubricating oil is supplied from a finely controlled oil supply unit into a space of an object to be lubricated such as a bearing, and into a housing that holds the object to be lubricated. In a finely controlled oil quantity lubrication device that injects oil along with an air flow flowing through a pipe inserted from the outside, the housing has a nozzle piece mounting hole extending in a radial direction toward the object to be lubricated, and the nozzle piece mounting hole The nozzle piece is attached so that its position can be adjusted through the hole, and the nozzle piece has a small diameter nozzle hole on the tip side.
A pipe insertion hole communicating with the nozzle hole on the distal end side and having a diameter larger than the nozzle hole extends across the housing and the object to be lubricated, and the tip of the nozzle piece receives a nozzle piece formed in the part to be lubricated. The pipe protrudes into the space of the object to be lubricated through the hole, and the nozzle hole opens toward the lubricated part of the object to be lubricated, and the tip of the pipe is inserted into the pipe insertion hole, and the pipe is fixed by a pipe fixing means. The pipe is fixed in a state in which it enters the nozzle piece.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The embodiment shown in FIG. 3 is a case where the bearing is located deep inside the machine body and it is not possible to supply oil directly from the outside of the housing 50. A pipe insertion hole 52, which is a pipe insertion hole with a circular cross section, is formed in the housing 50 parallel to the axial direction of the bearing 28 (left-right direction in FIG. 3), and a nozzle piece mounting hole and a piece screw are formed parallel to the radial direction of the bearing 28. A female threaded hole 54 for screwing the piece, which is a mating hole, is continuously drilled in the pipe insertion hole 52. A ball bearing 28 and a pair of spacers 56, 58 are arranged on the inner peripheral side of the housing 50.
A piece insertion hole 60 serving as a nozzle piece receiving hole is drilled in the outer ring spacer 56 in the radial direction in alignment with the female threaded hole 54.

The nozzle piece 62 is inserted in the radial direction of the housing 50 through the female screw hole 54 for screwing the piece in the housing 50 and the piece insertion hole 60 of the outer ring spacer 56, and is fixed in a predetermined position by screwing the male screw into the female screw hole 54. has been done. Further, the nozzle piece 62 has a pipe insertion hole 64 extending parallel to the axial direction of the bearing 28, an oil hole 66 extending parallel to the radial direction of the bearing 28, and a nozzle 30 which is a nozzle hole extending parallel to the insertion hole 64. It has a U-shaped cross section. The nozzle 30 is located near the outer peripheral surface of the inner ring 29 of the bearing 28.

Pipe insertion hole 52 drilled in housing 50
A female thread is formed at the entrance part (left end in FIG. 3), and a male thread formed on the outer peripheral surface of the columnar part of this joint 70 is screwed. A female thread is formed on the inner peripheral surface of the cylindrical portion of the joint 70, and the male thread of the plug 72 is screwed into this. A vinyl pipe 26 is inserted into the pipe insertion hole 52, and is fixed and held in the housing 50 by a joint 70 and a plug 72, which are pipe fixing means.

According to this embodiment, the lubricating oil flow path from the fine oil quantity supply unit 22 to the nozzle 30 is composed of only one vinyl pipe 26 and the oil hole 66 of the nozzle piece 62, Since there are no seams or diameter differences between the parts, a constant small amount of lubricating oil supplied from the unit 22 is passed along the way (especially when the housing 50
The oil reaches the nozzle 30 without any leakage or accumulation at the boundary between the outer ring spacer 56 and the outer ring spacer 56. Furthermore, since the pipe 26 penetrates into the nozzle piece 62, there is no fear of oil leaking between the pipe 26 and the housing 50, between the housing 50 and the nozzle piece 62, or between the housing 50 and the spacer 56. do not have.

Further, since the pipe insertion hole 52 of the housing 50 and the piece insertion hole 60 of the outer ring spacer 56 do not restrict the amount of oil, they may have large diameters, and the pipe walls may not be rough. Therefore, there is also the advantage that the production costs for drilling are reduced. Further, the nozzle piece 56 is connected to the housing 5
Since the nozzle 30 is screwed at 0, by rotating it and moving it in the radial direction, the direction and position of the nozzle 30 can be selected at the optimum position with respect to the bearing 28.

Next, a second embodiment of the present invention will be described with reference to FIG. 4. In this embodiment, the method of fixing and holding the pipe 26 to the nozzle piece 62 is different from the above embodiment. That is, the joint 70 and the plug in the embodiment described above can be assembled by screwing the male thread 57 formed on the outer peripheral surface of the tip of the metal pipe 26' into the female thread 59 formed in the axial direction of the nozzle piece 62a. It fulfills 72 roles.

Hereinafter, embodiments in which oil is supplied from outside of the housing 50 will be sequentially described.

In the third embodiment shown in FIG.
A pipe insertion hole 64b extending in the radial direction and a nozzle 30 extending in the axial direction are continuously formed in the pipe 2b. The vinyl pipe 26 extends inside the pipe insertion hole 64b and is fixed and held in the housing 50 by a joint 70 and a plug 72, as in the first embodiment.

According to the embodiment, the finely controlled oil amount supply unit 2
Since the oil supply path from 2 to the nozzle 30 is substantially composed of only one vinyl pipe 26, there is no worry of oil leakage or oil accumulation along the way. Maza 5
6 grade processing is also easy.

In the fourth embodiment shown in FIG. 6, the present invention is applied to a double row roller bearing 28', and the nozzle piece 62 is
The shape of c has been devised. In detail,
The nozzle piece 62c consists of a large diameter part 63, a small diameter part 65, and a cylindrical part 67, and the large diameter part 63 has a male thread formed on its outer circumferential surface and a pipe insertion hole 64c in the center. On the other hand, the nozzle 30 is formed in the center of the narrow diameter portion 65 . This nozzle piece 62c is fixed in a predetermined position by screwing the male thread of the large diameter part into the female thread of the housing 50, and the small diameter part 65 passes through the insertion hole 31 formed in the outer ring 27 and is inserted into both rollers. It extends between columns 71. In addition, the vinyl pipe 26 is the nozzle piece 62.
c, attached to housing 50 by plug 72;

Further, in the fifth embodiment shown in FIG. 7, the large diameter portion 63a of the nozzle piece 62d is not formed with a male thread, and the nozzle piece 62d is inserted into the piece insertion hole 81 of the housing 50 and the piece insertion hole 31 of the outer ring 27. After being inserted, it is positioned at the position shown in this figure by a joint 67 that is screwed into the female thread of the housing 50 and a plug 72 that is screwed into this joint.

It should be noted that the present invention should not be interpreted as being limited to the above embodiments, and it goes without saying that changes and improvements can be made as appropriate without departing from the spirit thereof.

As described above, according to the present invention, there is no pipe joint in the middle of the lubricating oil supply path from the minute oil supply unit to the nozzle, so that the minute amount of lubricating oil supplied from the unit is The effect is that the lubricant is reliably sent to the nozzle without leaking or stagnation, and that the nozzle supplies the oil to the bearings and the like.

In addition, since the nozzle piece is connected to the tip of the pipe separately from the housing, the position of the nozzle hole can be set appropriately in the space of the object to be lubricated, and the lubricated parts of the object to be lubricated can be reliably lubricated. Oil is sprayed. Therefore, it is most suitable as a lubricating device that lubricates lubricating oil from a space such as between the inner and outer rings of a bearing or between an inner ring spacer and an outer ring spacer.

[Brief explanation of the drawing]

FIG. 1 is a system diagram showing an example of a fine constant oil amount lubrication device, and FIG. 2 is a sectional view showing an example of a conventional fine constant oil amount lubrication device. FIG. 3 is a sectional view showing the first embodiment of the present invention, and FIGS. 4, 5, 6, and 7 show the second, third, fourth, and fifth embodiments of the present invention, respectively. FIG. Explanation of symbols of main parts, 22...Fine constant oil amount supply unit, 26...Pipe, 28...Bearing, 30
... Nozzle (nozzle hole), 50 ... Housing,
52...Pipe insertion hole (pipe insertion hole), 54...
...Female screw hole (nozzle piece mounting hole), 60...piece insertion hole (nozzle piece receiving hole), 62, 62a
~62d...Nozzle piece, 64...Pipe insertion hole.

Claims (1)

[Claims for Utility Model Registration] 1. A small and fixed amount of lubricating oil supplied from a micro-regular oil supply unit into a space of an object to be lubricated, such as a bearing, from the outside into a housing that holds the object to be lubricated. In a micro-quantity lubricating device that injects oil along with an air flow flowing through an inserted pipe, the housing has a nozzle piece mounting hole extending in a radial direction toward the object to be lubricated, and the nozzle piece mounting hole A nozzle piece is attached through the hole so that its position can be adjusted, and the nozzle piece has a small diameter nozzle hole on the tip side.
A nozzle piece that communicates with the nozzle hole on the distal side, has a pipe insertion hole with a larger diameter than the nozzle hole, and extends across the housing and the object to be lubricated, and the tip of the nozzle piece is formed in the part to be lubricated. protrudes into the space of the object to be lubricated through a receiving hole, the nozzle hole is opened toward a lubricated part of the object to be lubricated, and the tip of the pipe is inserted into the pipe insertion hole to fix the pipe. A finely fixed oil quantity lubricating oil device, characterized in that the pipe is fixed in a state in which it enters the nozzle piece by means. 2 a female thread is formed in the nozzle mounting hole;
The fine oil quantity vertical sliding device according to claim 1, wherein the nozzle piece is formed with a male thread. 3. The object to be lubricated consists of a bearing and an inner ring spacer and an outer ring spacer attached thereto, and the nozzle piece receiving hole is formed in the outer ring spacer. The finely controlled oil amount lubrication device according to item 2. 4. The finely controlled oil amount lubrication device according to claim 1 or 2, wherein the object to be lubricated is a bearing, and the nozzle piece receiving hole is formed in the outer ring of the bearing. 5. The object to be lubricated consists of a bearing and an inner ring spacer and an outer ring spacer attached thereto, and the space between the outer ring spacer and the inner ring spacer is a space of the object to be lubricated. A finely controlled oil quantity lubrication device according to any one of claims 1, 2, or 3, which is a registered utility model. 6. The object to be lubricated consists of a bearing including an inner ring and an outer ring, and the space between the inner ring and the outer ring is the space of the object to be lubricated. The finely controlled oil amount lubrication device according to any one of Items 1 and 4. 7 The housing has a pipe insertion hole in the axial direction that is continuous with the nozzle piece receiving hole, and the pipe is inserted into the pipe insertion hole and the pipe is fixed with its tip inserted into the pipe insertion hole of the nozzle piece. Any one of claim 1, 2, 3, or 5 of the utility model registration claim, which is attached to the housing by means.
Micro-controlled oil quantity lubrication device described in . 8. The pipe fixing means includes a joint screwed into a female thread formed at the entrance of the pipe insertion hole, and a plug screwed into the joint to tighten and fix the pipe. The finely controlled oil amount lubrication device according to item 7. 9. The pipe fixing means includes a female thread formed at the entrance of the receiving hole of the nozzle piece and a male thread formed at the tip of the pipe, thereby fixing the pipe. The fine-fixed oil quantity lubrication device described in . 10 The pipe fixing means includes a joint that is threaded into a female thread formed at the entrance of the receiving hole of the nozzle piece, and a plug that is threaded into the joint to tighten and fix the pipe. The finely controlled oil amount lubrication device according to item 5. 11. The fine-controlled oil quantity lubrication system according to claim 6, wherein the pipe fixing means includes a plug that tightens and fixes the pipe by screwing into a female thread formed at the entrance of the receiving hole of the nozzle piece. Device. 12. The fine fixing device according to claim 6, wherein the pipe fixing means includes a joint that is screwed into the nozzle frame attachment hole, and a plug that is screwed into the joint to tighten and fix the pipe. Oil quantity lubrication device.