JPH02298444A - Oil feeder - Google Patents

Abstract

PURPOSE:To keep off drip of oil by sealing a pinlike floating plug in an oil pipeline between two oil feed parts and closing this oil pipeline, in an oil feeder which feeds oil to the yet upper oil feed part than that being not yet sealed. CONSTITUTION:Any drip of oil is kept back by sealing a pinlike floating plug 200 in an oil pipeline 8 lying between oil feed part 9 situated upward and another oil feed part 7 situated downward. The oil pipeline 8 leading to a turning shaft 15 from the oil feed part 7 comes to a two stage system, or an upper side nearer to the turning shaft 15 is thick in size and the lower side is thin respectively, and the upper large diametral part comes to a sealing chamber 26 of the floating plug 200. This floating plug 200 is of pin form thicker in diameter than the oil pipeline 8 in its small diametral part, and the lower end comes to a conical closing part 200a, and a groove 200 passing oil is installed in the tip. The floating plug 200 is sealed in the sealing chamber 26, and when oil is not yet supplied, it closes the small diametral oil pipeline 8 through this closing part 200a.

Description

[Detailed Description of the Invention] Industrial Application Field The present application relates to an improvement of a oil supply system, and is intended to prevent oil in an oil supply pipe from flowing down while oil supply is stopped using a centralized oil supply system. It is.

Conventional technology and its problems The rotating parts of each element constituting a machine must be lubricated either automatically or manually. Depending on the characteristics of each part, two methods are used: a continuous lubrication method that supplies an appropriate amount of oil continuously, and an intermittent method that supplies a predetermined amount of oil intermittently at predetermined time intervals. widely known.

For example, as in the work rest 100, a roller 5 is attached to each of the arm 2 that moves back and forth while slidingly contacting the body 1 and the cover 18 of the body, and the arm 4 that is pivotally supported by a pivot 3 and swings around the pivot 3. , is a device that grips a workpiece with three rollers 5 and stabilizes it, and the oil supply part 7 cannot be said to be completely opened, like the sliding part 6 between the body 1 and the arm 2, or the pivot part by the pivot 3. It also has an oil supply pipe 8 that communicates with the outside and supplies oil to the unsealed area, and further supplies oil to the oil supply part 9 of the roller 5 via the sliding part 6 and the oil supply part 7, and improves operability etc. Due to the problem, if continuous lubrication is performed in a device that performs lubrication with the roller 5 facing upward, that is, with the open oil supply section 7 positioned downward, oil will leak from the open oil supply section 7 into the work area. However, a large amount of oil must be sent to account for this oil leakage, which increases oil consumption, so an intermittent lubrication system is used instead of continuous lubrication.

The intermittent system eliminates the drawback of the continuous oil supply system, which requires a large amount of oil to be sent at all times. However, as described above, this system sends a predetermined amount of oil at predetermined time intervals, so during the interval when refueling is stopped, the sliding part 6 in the open state and the refueling The oil in the oil feed pipe 8 flows down from the section 7, and when refueling, it is necessary to take this flow into account when refueling, and although the total oil consumption is lower than in the continuous oil supply system, oil loss is avoided. Not only is the oil flowing down, the roller 5 may rotate in a dry state depending on the case, and this tendency gradually increases as the oil supply portion 7 wears down. Although the amount of oil flowing down can be reduced by making the diameter of the oil feed pipe 8 as thin as possible, there is a limit due to processing problems, and a satisfactory solution has not been obtained.

Means for Solving the Problems The present invention aims to improve the above-mentioned conventional drawbacks by providing an oil supply section that communicates with the outside from an oil supply source through an unsealed oil supply section, such as when a work rest is used facing upward. In a refueling device that refuels an oil supply section located further above the oil supply section, a pin-shaped floating stopper is enclosed in the oil supply pipe between the two oil supply parts, and the oil supply pipe is closed with this floating stopper. This prevents oil from flowing down and eliminates the drawbacks of the conventional method.

Example The present application will be described in detail below with reference to drawings showing examples.

FIG. 2 is a plan view of the work rest 100 with the cover 18 removed from the body 1, and shows the cylinder 10 attached to the body 1.
The arm 2 is connected to the piston rond] 1 and moves forward and backward while slidingly contacting the body 1 and the cover 1a by the action of the cylinder ↑0. A cam follower 13 attached to the rear end of the cam follower 13 is pivotally supported by a pivot 3 installed between 1a and 1a, and the cam follower 13 is brought into contact with the cam plate 12 by the biasing force of the spring 14, and the arm 2 moves back and forth to make a rocking motion at a predetermined angle. A roller 5 is rotatably attached to a rotary shaft 15 fixed to the tip of each arm 2, 4. The three rollers 5 move between the positions shown by solid lines and imaginary lines in FIG. 2 to grip a workpiece (not shown) by the forward and backward movement and swinging motion of the arms 2 and 4 caused by the operation of the cylinder 1o. The work rest 1 is used to provide a steady rest during workpiece machining, but the work rest 1
00 is used extremely frequently with the roller 5 facing upward.

In the work rest 100 as described above, the sliding contact portion 6 between the arm 2 and the body 1 and the cover 1a, the pivot point between the arm 4 and the pivot shaft 3, and the pivot point between the rotating shaft 15 and the roller 5 are each connected to the oil supply section 7. .9, each of the self-oiling sections 7 is constructed as follows, and oil leakage occurs as in the conventional case. First, the oil supply part 7 that supplies oil to the sliding contact part 6 of the arm 2 is connected to the oil supply port 16 that is opened in the body 1.
An opening 18 is formed in one side of an elliptical oil reservoir 17 provided corresponding to the phase 41 on both sides (the upper side in the drawing is the cam plate 12),
Furthermore, an opening 19 is provided so as to communicate with an oil reservoir 17 provided on the cam plate 12 on the other side, and this oil supply pipe 8 passes through the arm 2 and connects to the pivot point between the rotating shaft 5 and the roller 5. Refueling section 9 located in
The oil supply section 9 is provided with oil. In this way, the oil supply section 7 between the arm 2, the body 1, and the cover 18 is supplied with oil by storing oil in the oil reservoir 17, and although this part is sealed with an O-ring 2o, Since the moving parts 6 are not completely sealed and communicated with the outside air in order to lubricate them, when intermittent lubrication is performed as described above, the oil supply pipe 8 located above the oil sump 17
The oil inside will flow down.

Next, in the oil supply section 7 between the pivot 3 and the arm 4, as shown in FIG. After oiling is performed at the two bent left and right portions, the rotary shaft 15 is further reached and oiling is performed at the oil supply portion 7. As is clear from the drawings, the oil supply section 7 is not sealed in any way, so the flow of oil is similar to that of the oil supply section 7. In the present application, the above-described oil flow is prevented by sealing a pin-shaped floating stopper 200 in the oil supply pipe 8 between the oil supply section 9 located above and the oil supply section 7 located below. Since the oil supply portions 9 of all the arms 2 and 4 have the same configuration, the following explanation will be given only for the oil supply portion 9 of the arm 4.

The oil supply pipe line 8 that supplies oil to the oil supply part 7 reaches the oil supply part 9 through the above-mentioned path, but in this embodiment, the oil supply pipe line 8 from the oil supply part 7 to the rotating shaft 15 is shown in FIG. As shown in the figure, it is a two-stage type, with the upper side near the rotation axis 1-5 being thicker and the lower side being thinner, and one large diameter part is the floating stopper 20.
0, and it is preferable to form a tapered closed surface at the junction between the large diameter part and the small diameter part, since this will enhance the sealing effect. The floating plug body 200 has a pin shape with a diameter larger than that of the oil feed pipe 8 in the small diameter portion, and has a conical closing portion 200a at the lower end, and a groove 200b for allowing oil to pass through is provided at the tip. . It should be noted that if the closing part 200a is constructed by bonding a member with good sealing properties such as rubber,
Effective closure is achieved, and the same effect can also be obtained by cutting off the tip into a stalk shape instead of the groove 20ob. The floating stopper 200 having the above configuration is enclosed in the enclosure chamber 26,
When oil is not being supplied, the small diameter oil feed pipe 8 is closed by the closing portion 200a.

Next, the operation of the present invention will be explained, but since the operation is the same for each arm 2 and 4, the following explanation will be given only for arm 4. Supply port 21 from an oil supply source (not shown)
When oil is supplied to the oil supply section 7, the oil passes through the oil supply pipe line 8 and reaches the oil supply section 7.
The oil is supplied with oil and then passes through the oil supply pipe line 8 to the oil supply part 9. However, when the oil that has passed through the small diameter oil supply pipe line 8 reaches the joint with the large diameter part, the oil pressure of the sent oil causes the oil supply pipe to flow. The floating stopper 200 that closes the passage 8 is pushed up to open the closure and enters the sealing chamber 26, and the bearing 24 is supplied with oil from the oil supply pipe 8 bored in the rotating shaft 15 through the annular groove 23. In the above, the floating plug 200 is pushed up because the floating plug 200 is extremely small (length 30 + mm thickness 311 [1Φ) and has a light pin shape, and is suspended in fluid, that is, oil, using buoyancy. Since it is pushed up, the resistance when pushing up is extremely small, and there is no need for any special measures such as increasing the power of the hydraulic pump. The floating stopper 200 pushed up into the inclusion chamber 26 floats in the oil-filled containment chamber 200, and as described above, the inclusion chamber 26 has a wider cross-sectional area than the floating stopper 200. By enclosing the floating plug body 200, smooth oil supply is performed without causing any hindrance to the flow of oil.

When the predetermined amount of oil has been filled, the oil supply is temporarily stopped and the force that pushes up the floating plug body 200 naturally ceases to act.
The floating plug body 200 sinks due to its own weight and closes the oil feed pipe 8 again. Therefore, the oil supply pipe 8 is closed by the floating stopper 20.
0 and the weight of the oil in the oil supply pipe 8, and furthermore, when the liquid level in the oil supply pipe 8 from the closed part to the oil supply part 7 attempts to drop (oil leaks), the inside of the pipe 8 becomes negative pressure. Therefore, atmospheric pressure acts as a large closing force, and complete sealing is achieved so that no oil leaks from the oil supply section 7. The above explanation is for the case where the frequently used roller is facing upward, but if the roller 5 is used with the roller 5 facing downward and oil is supplied, the floating plug 200 will be in the opposite direction to that in FIG. Since the groove 200b is provided as described above, the floating stopper 2
00, the oil supply pipe 8 is not closed and oil supply is performed without any problem.

Next, the embodiment shown in FIG. 3 differs from the first embodiment in that the oil feed pipe 8 is of a two-stage type with a large diameter portion and a small diameter portion, and the oil feed pipe 8 is closed at the joint portion. On the other hand, in this embodiment, a pair of floating plugs 200 are enclosed in the large diameter portion without providing a small diameter portion, and the transition point from the oil feed pipe 8 drilled in the pivot 3 to the oil feed pipe 8 drilled in the arm 4 is This is intended to achieve substantially the same effect as constricting and closing the oil feed pipe 8, and the processing of the oil feed pipe 8 is facilitated.

Effects of the Invention As described in detail above, the present application provides an oil supply pipe between the oil supply section where oil leakage occurs and the oil supply section located on one side of the oil supply section.
A pin-shaped floating stopper with a small mass is inserted to close the oil supply pipe and prevent oil leakage while refueling is not being performed, so the oil supply pipe is always filled with oil and does not require intermittent lubrication. This eliminates the loss of oil when doing this or when starting work in the morning, and not only has extremely low operating resistance to open the closure, but the oil supply pipe can be made large in diameter, so there is less oil leakage during refueling. Furthermore, it has the advantage of being easy to process and maintenance-free for the oil feed pipe.

[Brief explanation of the drawing]

The drawings show an embodiment of the present application, and FIG. 1 is an enlarged sectional view taken along line 2--n in FIG. 2, FIG. 2 is a plan view with the cover removed, and FIG. 3 shows another embodiment. 1. Body, 2, 4. Arm, 3 Axis, 5. Roller, 7
．． 9... Oil supply part, 8... Oil feed pipe, 100 - Work rest, 200... Floating plug body

Claims (1)

[Claims] 1. In a oil supply device that supplies oil from an oil supply source to an oil supply part located further above the oil supply part through an unsealed oil supply part that communicates with the outside, such as when the work rest is used facing upward. An oil supply device in which a pin-shaped floating stopper is enclosed in the oil supply pipe between the two oil supply parts, and the oil supply pipe is closed with the floating stopper to prevent oil from flowing down.