JP4354751B2 - Oil mist lubrication device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to improvements in a spray lubrication device that supplies various types of bearings, sliding of gears and other mechanical elements, and atomizes and supplies lubricating oil to rolling parts, and more specifically, while continuing operation of the mist lubrication device, In other words, the oil mist lubrication apparatus can manually supply oil without stopping the generation of mist.
[0002]
[Prior art]
Conventionally, such an oil mist lubrication device has been mentioned as one of the features that the piping is simple and that oil can be evenly distributed to each part. Therefore, it is suitable for lubrication of bearings and MQL (minimum oil amount lubrication) processing. While the demand for continuous operation is increased due to increased efficiency of machining, from the viewpoint of energy saving, machine operation is frequently stopped by stopping the machine operation frequently and stopping electricity and air (for example, , See Patent Document 1).
[Patent Document 1]
Japanese Patent Laid-Open No. 11-351361
[Problems to be solved by the invention]
However, in the conventional oil mist lubrication device, the operation is performed under air pressure. When replenishing the lubricating oil (lubricant), the operation is stopped and the internal pressure is released to the atmosphere. It is necessary to install an automatic oiling system separately.
[0004]
In addition, there is a difference between frequent machine stoppages for energy savings and machine stoppages for oiling. It is impossible to supply oil when energy-saving machine stops, considering its efficiency. Regarding oil supply, it is necessary to prepare an oil feeder, so it is difficult to respond when the number of machines is small, and there is a problem that the equipment cost burden becomes large when the number of machines increases. .
[0005]
Furthermore, in recent years, with the promotion of MQL lubrication, the amount of lubricating oil consumed has greatly decreased, and automatic lubrication tends to be avoided in terms of the balance between lubrication frequency and automatic lubrication equipment costs. There is a demand for a low-cost oil mist lubrication device that can supply oil while continuing operation.
[0006]
The present invention has been made in view of such conventional problems and demands. In other words, while continuing the operation of the mist lubrication device, in other words, without stopping mist generation, it is possible to manually supply oil and Providing a low-cost oil mist lubrication device that can supply the exact amount of oil calculated according to the lubrication purpose by collecting and re-spraying raw oil, etc., that causes the dispersion of oil in the oil tank chamber It is aimed at.
[0007]
[Means for Solving the Problems]
In order to solve the conventional problems as described above and achieve the intended purpose, the structure of the present invention includes a direction switching valve and / or a pressure regulating valve arranged in series in an air supply path, A mist generator disposed on the downstream side of the direction switching valve and / or the pressure regulating valve; a metering oil supply means disposed in a branch of the direction switching valve via an air bypass; and the metering oil supply An oil mist lubrication device comprising a metered oil supply line piped from the means to the mist generator, and an oil tank arranged to communicate with the mist generator, wherein the oil tank contains lubricating oil or lubricant. An oil tank chamber to be stored, a mist chamber partitioned through a partition wall in the oil tank chamber to store mist generated by the mist generator, and formed in the partition wall to communicate the mist chamber and the oil tank chamber. Communication hole and one end side An oil supply cylinder that is disposed so as to be displaceable in the mist chamber so that the other end is seated on the communication hole and opens and closes the communication hole according to a displacement operation of the oil supply cylinder. In oil mist lubrication equipment.
[0008]
The oil supply cylinder has an upper end supported by a mounting hole of the mist chamber and a lower end of which is screwed up and down to be seated on the communication hole, and an upper end opening of the cylinder main body is closed. An oil supply plug that is screwed as much as possible, an exhaust hole that penetrates from the bottom surface of the screwed portion of the oil supply plug toward the outer peripheral side surface, and a lower end surface of the cylinder body that closes the connecting hole when seated on the partition wall And a seal groove that holds a packing such as an O-ring displaceably between the cylinder body and the oil filler plug and changes the tightening force of the packing according to a change in internal pressure. Is good.
[0009]
In the oil mist lubrication device of the present invention configured as described above, the oil tank includes an oil tank chamber for storing lubricating oil or a lubricant, and a partition in the oil tank chamber to store the mist generated by the mist generator. A compartmented mist chamber, a communication hole formed in the partition wall for communicating the mist chamber and the oil tank chamber, one end side facing the outside of the mist chamber, and the other end side seated on the communication hole An oil cylinder disposed in the mist chamber so as to be displaceable, and by opening and closing the communication hole according to the displacement operation of the oil cylinder, the oil cylinder is not seated (when the communication hole is open). The mist chamber communicates with the oil tank chamber, and oil that has not been misted (raw oil) or oil that has condensed from the mist state (condensed oil) is efficiently dropped and refluxed into the oil tank chamber. Get and refuel In Sunda seating state (when closing the communication hole), since the oil tank chamber is directly communicated with the oil supply cylinder is independent of the mist chamber allows oil from the cylinder to the oil tank chamber.
[0010]
The oil supply cylinder has an upper end supported by a mounting hole of the mist chamber and a lower end of which is screwed up and down to be seated on the communication hole, and an upper end opening of the cylinder main body is closed. An oil supply plug that is screwed as much as possible, an exhaust hole that penetrates from the bottom surface of the screwed portion of the oil supply plug toward the outer peripheral side surface, and a lower end surface of the cylinder body that closes the connecting hole when seated on the partition wall And a seal groove that holds a packing such as an O-ring displaceably between the cylinder body and the oil filler plug and changes the tightening force of the packing according to a change in internal pressure. By simply turning the oil plug with fingers, the cylinder body moves downward while rotating with the oil plug, and the seal portion is seated on the partition wall so that the communication hole can be sealed. , Only detachment operation of the oil supply plug, while continuing the operation, in other words, without stopping the generation of the mist, so that the manual may fueling the oil tank chamber.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an example of an embodiment of the oil mist lubricating device according to the present invention will be described with reference to the drawings. In the figure, A is an oil mist lubrication device according to the present invention. As shown in FIG. 1, this oil mist lubrication device A includes a directional control valve 2 and a pressure regulator arranged in series in an air supply path 1. A valve 3 and a mist generator 4 disposed on the downstream side of the pressure regulating valve 3 are provided.
[0012]
The direction switching valve 2 is composed of, for example, a two-port solenoid valve, and the pressure regulating valve 3 includes a pressure reducing valve such as an air regulator.
[0013]
As the mist generator 4, either a Venturi type or a Vortex type may be used. For example, as a Venturi type, for oil dripping monitoring attached to a higher level of a pressurized oil tank (not shown). The site dome (not shown), a venturi mechanism (not shown) attached below the site dome, and a level switch (not shown) attached to the bottom of the pressurized oil tank. Good thing to use.
[0014]
In addition, a metering oil supply means 6 is disposed in the tributary of the direction switching valve 2 via an air bypass 5. The metering oil supply means 6 can be used either as a pump type or as a suction type. As the pump type, for example, a plunger pump communicating with an oil tank 8 described later and an air switching valve (not shown) are communicated. A combination with a three-port solenoid valve is mentioned.
[0015]
Incidentally, this three-port solenoid valve operates a plunger pump with compressed air generated by ON / OFF operation of the solenoid valve, and sucks a fixed amount of oil that has been cleaned from an oil tank through an oil filter (not shown), A fixed amount of oil is supplied to a sight dome (not shown) in the mist generator 4 through a fixed oil supply line 7.
[0016]
The oil tank 8 includes an oil tank chamber 8a for storing lubricating oil, and a mist chamber 8c defined in the oil tank chamber 8a via a partition wall 8b. The mist generated by the mist generator 4 is the same as the mist chamber 8c. It is to be housed inside.
[0017]
The partition wall 8b is formed with a communication hole 8d that allows the mist chamber 8c and the oil tank chamber 8a to communicate with each other, with one end projecting outside the mist chamber 8c and the other end seated in the communication hole 8d. Accordingly, an oil supply cylinder 9 is provided in the mist chamber 8c so as to be displaceable.
[0018]
Oil cylinder 9 has an upper end side is supported through a mounting hole 8c ₂ on the outer wall 8c ₁ of the mist chamber 8c, a cylinder body 9a which is engaged vertically movably threaded in order to seat the lower end side on the communication hole 8d , And an oil supply plug 9b screwed to close the upper end opening of the cylinder body 9a.
[0019]
Cylinder body 9a is helical portion of the male-like on an outer peripheral surface and (left-hand thread) 9a ₁ is circumferentially provided, the outer wall 8c ₁ of the mounting hole 8c ₂ below concentrically formed a female-shaped guide slots (left by being screwed into the screw) 8c _3, are vertically movable support.
[0020]
Further, on the outer peripheral surface of the upper end of the cylinder body 9a, the packing 10 via the annular groove 9a ₂ is circumferentially provided. This packing 10 is made of, for example, a cross-section Y-type or U-type packing, in which forms a seal of the spiral hole 8c _3.
[0021]
Furthermore, the upper of such packing 10, a stopper 9a ₃ for restricting the upward movement of the cylinder body 9a is formed. The stopper 9a ₃ abuts against the upper end 8c ₅ of the step groove 8c ₄ for sliding the cylinder formed larger in diameter than the mounting hole 8c ₂ formed in the outer wall 8c ₁ , thereby making the cylinder body 9a more than necessary. It is assembled to regulate the upper limit stroke.
[0022]
Further, a poppet type seal portion 9e is disposed on the lower end surface of the cylinder body 9a, and is assembled to seal the connecting hole 8d when seated on the partition wall 8b.
[0023]
Further, between the cylinder body 9a and the oil supply plug 9b, a seal groove portion 11 that holds a packing 10a such as an O-ring so as to be displaceable and changes the tightening force of the packing 10 according to a change in internal pressure. Is formed.
[0024]
As shown in FIG. 3, the seal groove portion 11 is formed of an annular hole that gradually narrows as it goes upward, so that the packing 10 is pushed up by the internal pressure and the tightening margin of the packing 10 is increased. It has been devised.
[0025]
On the other hand, the oil supply plug 9b is a male-like engagement portion (right-hand thread) 9b ₁ are continuously provided downward. The threaded portion 9b ₁ is intended to be freely screwed detachably to the upper end opening to the engraved females shaped guide slots (right-hand thread) 9a ₄ of the cylinder body 9a, engagement portion 9b ₁ to such exhaust hole 9c is formed from the bottom surface 9b ₂ so as to penetrate toward the outer peripheral side surface 9b _3.
[0026]
The exhaust hole 9c communicates with the outside air before the oil filler plug 9b is detached from the cylinder body 9a, and discharges the pressure in the cylinder body 9a to the atmosphere.
[0027]
In the oil mist lubrication device of the present embodiment configured as described above, first, the cylinder body 9a, which is a left-hand screw, rotates downward together with the oil supply plug 9b by turning the oil supply plug 9b counterclockwise with fingers. And the seal portion 9d is seated on the partition wall 8b, whereby the communication hole 8d can be sealed. At this time, a pressure volume having a predetermined pressure is produced inside the oil tank 8 and the cylinder body 9a.
[0028]
Further, by rotating the oil supply plug 9b in the same direction (counterclockwise), the cylinder body 9a stops rotating, and as soon as it cannot move downward, the oil supply plug 9b starts to loosen. continuing the rotation of the same direction, the threaded portion 9b ₁ of the oil supply plug 9b is before departing from the cylinder body 9a, communicating exhaust hole 9c is ambient air, to release the internal pressure of the pressure Boryuumu the atmosphere Can do.
[0029]
Thereafter, the oil supply plug 9b opens out of the upper end of the cylinder body 9a, and the oil supply operation can be performed from this opening. Therefore, while continuing the operation of the mist lubrication device, in other words, it is possible to manually supply oil without stopping the generation of mist, so that it is not necessary to separately provide an expensive automatic oil supply system.
[0030]
Next, when the oil plug 9b is screwed again after the oil supply operation is completed, the packing 10 in the seal groove 11 is loosened (see FIG. 3B), so that the oil plug 9b can be screwed into the cylinder body 9a first. it can.
[0031]
Further, by screwing the oil supply plug 9b in the same direction, in other words, as soon as the screwing into the cylinder body 9a is finished, the cylinder body 9a itself starts to rotate together and moves upward, and the seal portion 9e The seal of the communication hole 8d is released, and the mist chamber 8c and the oil tank chamber 8a have the same pressure. At that time, non-misted oil (raw oil) staying in the mist chamber 8c (on the partition wall 8b) or oil condensed from the mist (condensed oil) is returned to the oil tank chamber 8a through the communication hole 8d. It is done.
[0032]
Therefore, even if raw oil or the like stays in the mist chamber 8c, it can be forcibly recovered into the oil tank chamber 8a without providing a separate raw oil recirculation line, which causes variations in the oil amount. It is possible to prevent adverse effects such as raw oil (increase in fog amount).
[0033]
In particular, since most of the raw oil and the like is collected in the oil tank chamber 8a and resprayed, the amount of oil calculated according to the purpose of lubrication can be accurately supplied (even in a small amount).
[0034]
The oil mist lubrication apparatus A of the present invention is not limited to this embodiment, and can be freely modified within the scope of the object of the present invention, and the present invention encompasses all of them. It is.
[0035]
For example, the present invention is not limited to this embodiment, and an element (filter medium) 12 may be mounted in the cylinder body 9a as necessary. Further, the poppet seal on the upper surface of the partition wall 8b (on the mist chamber 8c side) may be used. The part that does not exist may be recessed in a conical shape toward the (poppet) seal part 9e.
[0036]
In this embodiment, a pump type is used for the metered oil supply means. However, the present invention is not limited to this, and when the metered oil supply unit 7 is a suction type, the metered oil supply line 7 is continuously (with a differential pressure). As a result, the air bypass path 5 can be made unnecessary. In the figure, 13 is a check valve and 14 is a mist outlet for lubrication.
[0037]
【The invention's effect】
The present invention is configured as described above, and the oil tank includes an oil tank chamber that contains lubricating oil or a lubricant, and a mist chamber that is partitioned through a partition wall in the oil tank chamber so as to contain mist generated by a mist generator. A communication hole formed in the partition wall to communicate the mist chamber and the oil tank chamber, and one end side faces the outside of the mist chamber, and the other end side is displaced into the mist chamber to be seated on the communication hole. A mist chamber and an oil tank chamber when the oil supply cylinder is not seated (when the communication hole is open) by opening and closing the communication hole according to a displacement operation of the oil supply cylinder. , And the oil that has not been made mist (raw oil) and the oil condensed from the mist state (condensed oil) can be dropped and recirculated into the oil tank chamber efficiently. Raw oil that causes variation The oil tank chamber is independent of the mist chamber and communicates directly with the oil cylinder when the oil cylinder is seated (when the communication hole is closed). In other words, there is an effect that the oil tank chamber can be manually refilled without stopping the generation of mist.
[0038]
The oil supply cylinder has an upper end supported by a mounting hole of the mist chamber and a lower end of which is screwed up and down to be seated on the communication hole, and an upper end opening of the cylinder main body is closed. An oil supply plug that is screwed as much as possible, an exhaust hole that penetrates from the bottom surface of the screwed portion of the oil supply plug toward the outer peripheral side surface, and a lower end surface of the cylinder body that closes the connecting hole when seated on the partition wall And a seal groove that holds a packing such as an O-ring displaceably between the cylinder body and the oil filler plug and changes the tightening force of the packing according to a change in internal pressure. By simply turning the oil plug with your fingers, the cylinder body moves downward while rotating with the oil plug, and the seal portion is seated on the partition wall to seal the communication hole. Therefore, the operation can be continued only by attaching and detaching the oil plug, in other words, without stopping the generation of mist, the oil tank chamber can be manually refueled. It has economic effects such as eliminating the need for installation.
[0039]
Thus, the oil mist lubrication device of the present invention can supply oil manually while continuing the operation of the mist lubrication device, and most of the raw oil that causes the oil amount variation is recovered and resprayed. It is possible to continuously atomize even a small amount of oil without changing the fog amount, and it is suitable for mass production because the structure is simple, and it can be provided to customers as a low price, etc. Implementing the present invention is of great practical value.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an oil mist lubricating device according to the present invention.
FIG. 2 is an enlarged longitudinal sectional view showing a main part of the oil mist lubricating device.
FIG. 3 (a) is an explanatory view showing a state where the packing margin of the packing is increased by being pushed up by the internal pressure, and FIG. 3 (b) is an explanatory view showing a state where the tightening margin of the packing is small.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Air supply path 2 Direction switching valve 3 Pressure control valve 4 Mist generator 5 Air bypass path 6 Metering oil supply means 7 Metering oil supply line 8 Oil tank 8a Oil tank chamber 8b Partition wall 8c Mist chamber 8c ₁ Outer wall 8c ₂ Mounting hole 8c ₃ Spiral Hole (left-hand thread)
8c ₄ step grooves (for cylinder sliding)
8d Communication hole 9 Lubrication cylinder 9a Cylinder body 9a ₁ spiral part (left screw)
9a ₂ annular groove 9a ₃ stopper 9a ₄ spiral hole (right screw)
9b Refueling plug 9b ₁ threaded part (right thread)
9b ₂ bottom surface 9b ₃ outer peripheral side surface 9c exhaust hole 9d seal part 10 packing 11 seal groove part 12 element 13 check valve 14 mist outlet

Claims (3)

A direction switching valve and / or a pressure regulating valve arranged in series in the air supply path, a mist generator arranged downstream of the direction switching valve and / or the pressure regulating valve, and an air bypass path A metering oil supply means arranged in a branch of the direction switching valve, a metering oil supply line piped from the metering oil supply means to the mist generator, and arranged to communicate with the mist generator. In an oil mist lubrication device comprising an oil tank,
The oil tank includes an oil tank chamber for storing lubricating oil or a lubricant, a mist chamber partitioned by a partition in the tank chamber to store mist generated by the mist generator, the mist chamber, and the oil tank chamber A communication hole formed in the partition wall, and an oil supply cylinder that is displaceably disposed in the mist chamber so that one end faces the outside of the mist chamber and the other end is seated in the communication hole. An oil mist lubrication device that opens and closes the communication hole according to a displacement operation of the oil supply cylinder. An oil tank chamber for containing lubricating oil or a lubricant, a mist chamber partitioned through a partition wall in the oil tank chamber, a communication hole for connecting the mist chamber and the oil tank chamber, and one end side facing the outside of the mist chamber And an oil tank that displaceably displaces in the mist chamber so that the other end side is seated on the communication hole, and has an oil tank that opens and closes the communication hole according to a displacement operation of the oil supply cylinder. A featured oil mist lubrication system. The oil supply cylinder has a cylinder main body whose upper end is supported by the mounting hole of the mist chamber and whose lower end is screwed up and down to be seated on the communication hole, and a screw to close the upper end opening of the cylinder main body. An oil plug that is attached, an exhaust hole that penetrates from the bottom surface of the threaded portion of the oil plug toward the outer peripheral surface, and a lower end surface of the cylinder body that closes the connecting hole when seated on the partition wall. A seal portion and a seal groove portion for holding a packing such as an O-ring displaceably between the cylinder body and the oil plug and changing a tightening force of the packing in accordance with a change in internal pressure are provided. The oil mist lubrication device according to claim 1 or 2, wherein

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