JPH0722629B2 - Rotary hook oiling device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for supplying lubricating oil to a sliding portion of a rotary hook, more specifically, an outer hook.

[Prior art]

As an oil supply device for a rotary hook, the one shown in FIG. 4 has been conventionally proposed.

That is, the rotary shaft 2 of the outer pot 1 is formed with a storage hole 2a having an inner peripheral surface inclined in a direction away from the axial direction as it goes upward, and the lower end thereof is provided with the lubricating oil 4a in the lubricating oil storage tank 4. Be immersed in.

Then, in the storage hole 2, the lubricating oil in the lubricating oil storage tank 4
An oil wick 3 whose lower end is immersed in 4a is stored.

Reference numeral 5 denotes a first supply hole formed in the bottom portion 1b of the outer pot 1 and having one end opened to the upper part of the storage hole 2a, 6 is formed in the side wall 1c of the outer pot 1, and the lower end has the other end of the first supply hole 5. A second supply hole communicating with the upper end of the second supply hole communicates with the rail groove 1a of the outer hook to supply lubricating oil to the sliding portion. 6a is the second supply hole 6
An oil core 7 inserted into the oil core 7 is an oil amount adjusting screw for abutting against the oil core 6a and changing its cross-sectional area to finely adjust the supply amount of the lubricating oil.

When the rotary shaft 2 of the outer pot 1 is rotationally driven, the lubricating oil in the storage tank 4 is supplied to the supply hole by the synergistic effect of the penetration of the oil core 3 in the storage hole 2a and the inclined surface of the storage hole 2a. Can be supplied.

Further, the oil amount adjusting screw provided in the middle of the supply path for guiding the lubricating oil to the rail groove 1a of the outer pot 1 enables fine adjustment of the oil amount of the lubricating oil supplied to the rail groove 1a of the outer pot 1. Has become.

[Problems to be Solved by the Invention]

However, the above-mentioned conventional technique has the following problems.

(A) It is difficult to obtain stable pump performance because the rotation of the outer hook rotating shaft varies due to the fitted state of the outer hook rotating shaft and the bearing portion.

(B) Since the pump operation is synchronized with the rotation of the outer hook rotating shaft, the lubricating oil supply amount is remarkably different between the high speed rotation and the low speed rotation.

(C) The supply amount cannot be properly adjusted in response to the decrease in the viscosity of the lubricating oil due to the deterioration of the lubricating oil.

(D) Cavitation phenomenon occurs in the high-speed drive of the pump, and the amount of lubricating oil supplied to the necessary locations becomes insufficient.

[Means for Solving the Problems]

An oil supply device for a rotary hook according to the present invention includes an oil feed passage inside, and an outer hook rotary shaft having a plurality of oil ports provided around the oil feed passage for supplying lubricating oil to the oil feed passage, and a fog on the oil feed passage. The atomizing mechanism for supplying the lubricating oil in the form of a stream is composed of an air supply source, a lubricating oil storage tank, a first conduit and a second conduit, and
One end of the first conduit is connected to the air supply hole through an air flow rate adjusting device, and the other end is opposed to the oil port of the rotary shaft of the outer pot, and one end of the second conduit provided with an oil amount adjuster. Is to solve the above-mentioned conventional problem by connecting the first conduit and immersing the other end in the lubricating oil in the lubricating oil storage tank.

[Action]

In the rotary hook oil supply device according to the present invention, the lubricating oil suctioned from the second conduit by atomizing the air flow from the air supply source into the first conduit is atomized, and the lubricating oil is supplied from the first conduit to the oil feed passage. It is fed from the sliding part of the outer pot via.

Example of Invention

 An embodiment of the present invention will be described with reference to the drawings.

1 to 3 are views showing an embodiment of the present invention.

In FIG. 1, reference numeral 1 denotes an outer pot having a sliding portion. At the lower end of the outer pot 1, an outer pot rotary shaft 8 having an oil feed passage 8b in the axial direction is connected and piped. A plurality of oil ports 8a for supplying lubricating oil are provided around the lower side surface of the shaft 8.

M is a spraying mechanism that sprays atomized lubricating oil to the above-mentioned oil port 8a, and is composed of a first conduit 9, a second conduit 10, and an air supply source 11.

The first conduit 9 and the second conduit 10 form a Y-shaped bifurcated tube integrally formed.

That is, as shown in FIG. 1, the first conduit 9 having a straight pipe shape
Has one end facing the oil port 8a and the other end connected to the air supply source 11 via an air flow rate adjusting device 11a.

Also, one end of the second conduit 10 having the same straight pipe shape has the first
The conduit 9 is integrally connected to a substantially central portion of the conduit 9, and the other end thereof is immersed in the lubricating oil 4a in the lubricating oil storage tank 4.

In addition, 10a is an adjusting pin as an oil amount adjuster provided in the second conduit 10, and the amount of oil is adjusted by advancing and retracting the pin.

Next, the operation will be described with reference to FIG.

The air supplied from the air supply source 11 first flows into the air flow rate adjusting device 1b as indicated by the arrow, and the flow rate is adjusted here and a predetermined amount of air is sent to the first conduit 9.

The supplied air is in the first conduit 9 in the arrow direction, that is,
The outer hook rotating shaft 8 moves toward the oil port 8 at a relatively high speed.

Therefore, the pressure in the first conduit becomes lower than the pressure in the second conduit, so that the lubricating oil 4a of the lubricating oil storage tank 4 is sucked into the first conduit 9 via the second conduit 10 and becomes the air flow. Mixed and atomized.

Then, the atomized lubricating oil is injected from the end of the first conduit 9 and reaches the oil feed passage 8b through the oil port 8a of the outer pot rotating shaft 8 and passes through the oil feed passage 8b to reach the outer pot 1. Is fed to a predetermined sliding part of the.

Here, when the atomized lubrication flows from the first conduit 9 to the oil port 8a,
The outer hook rotating shaft 8 is rotating, but as shown in FIG.
Since a plurality of 8a are provided on the peripheral edge of the outer hook rotating shaft 8 at a small interval, the atomized lubricating oil smoothly flows into the oil feed passage 8b.

Further, the adjustment of the oil supply amount is performed by the air amount adjustment device 11a and the oil amount adjustment pin 10a.

For example, when the viscosity of the lubricating oil decreases due to the deterioration of the lubricating oil, the lubricating oil supply amount increases, but the oil amount adjusting pin 10a
To reduce the amount of oil supply, or to adjust the air flow rate controller 11a
Thus, the air flow rate is reduced and the lubricating oil suction force in the first conduit 9 is reduced, so that an appropriate amount of oil supply can be easily obtained.

〔The invention's effect〕

According to the present invention, since the lubricating oil is atomized and supplied to the outer pot by the above-described structure and operation, the change in the amount of oil supply caused by the variation in the fitting between the rotary shaft and the bearing and the change in the pump performance due to the fluctuation in the rotational speed of the rotary shaft. It is possible to solve problems such as changes in the amount of lubrication due to changes in the amount of lubrication and insufficient amount of lubrication due to cavitation caused by high-speed pump drive, and it is possible to adjust the amount of lubrication appropriately in response to the decrease in lubricating oil viscosity due to deterioration of lubricating oil It is possible to continuously ensure a stable supply of lubricating oil.

In addition, the rotary shaft can be effectively cooled from the inside by causing the atomized lubricating oil in which the lubricant oil and the air are mixed to flow to the rotary shaft of the outer pot.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an embodiment of the present invention, FIG. 2 is a vertical sectional view showing an operating state of a rotary hook oil supply device according to the present invention, and FIG. 3 is a first conduit and an oil. FIG. 4 is a partially cutaway perspective view showing a related configuration of the mouth, and FIG. 4 is a vertical sectional view of a conventional kettle oil supply device. In the figure, 1 ... Outer pot 4 ... Lubricating oil storage tank 4a ... Lubricating oil 8 ... Outer pot rotating shaft 8a ... Oil port 8b ... Oil feed passage 9 ... First conduit 10 ... Second conduit 11 ...... Air supply source 11a …… Air amount adjusting device M …… Spraying mechanism

Claims (1)

[Claims] Claim: What is claimed is: 1. An outer pot rotary shaft having an oil feed passage therein, wherein a plurality of oil ports for supplying lubricating oil to the oil feed passage are fixedly provided.
A rotary hook oil supply device comprising a spray mechanism for supplying mist-like lubricating oil to the oil feed path, wherein the spray mechanism comprises an air supply source, a lubricating oil storage tank, a first conduit and a second conduit.
A first conduit, one end of which is connected to the air supply source through an air flow rate adjusting device, and the other end of which is opposed to an oil port of the outer pot rotating shaft, and an oil amount adjuster. One end of the second conduit provided with is connected to the first conduit, and the other end is immersed in the lubricating oil in the lubricating oil storage tank to introduce an air flow from the air supply source into the first conduit. Atomizing the lubricating oil sucked from the second conduit,
A rotary hook oil supply device characterized in that the atomized lubricating oil is sent to a swinging portion of an outer hook via a first conduit oil feed passage.