KR970005993Y1 - Auto-lubricator - Google Patents

Abstract

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Description

Auto lubricator

1 is a perspective view showing the appearance of the automatic lubrication apparatus of the present invention

2 is a longitudinal sectional view of the automatic lubrication device of FIG.

3 is a view showing the assembly of the piston and the piston ring and the cross section of the piston ring according to the present invention

3A is a partial cross-sectional view taken along the line A-A of FIG.

4 is a cross-sectional view of an embodiment of a pressure sensing device and a current interruption device of the present invention;

5 is a cross-sectional view of another embodiment of the pressure sensing device and the current interrupting device of FIG.

6 is a cross-sectional view of the automatic lubrication device of the prior art

* Description of the symbols for the main parts of the drawings *

10, 10: automatic lubrication device 11, 111: housing

12, 112: lubricant 13, 113: oil hole

15, 115: piston 16, 116: gas chamber

17, 117: electrolytic cell 18, 118: control switch

19, 119: electrolyte 21, 121: warning light

24, 124: cover 26, 126: upper cap

27, 127: cylindrical portion 28, 128: inlet reinforcement

29: filling hole stopper 30, 130: electrolysis device

31, 131: upper electrode 33, 133: circuit board

34, 134: current blocking device 36, 136: pressure sensing device

37: groove 38: piston ring

39 fluorescent material 40 switch actuator

41: stem 42: storage groove

43: ring 44: compression spring

45: ball 46: spring

47: flexible membrane B: battery chamber

The present invention relates to an improvement of an automatic lubrication device for lubricating an appropriate amount of oil or grease on a rotating shaft or bearing of an industrial machine.

Two types of automatic lubricating oil devices known to date are spring type (US Patent No. 4,375,264) and gas pressure type (US Patent No. 3726473, Canadian Patent No. 1280700C, and Korean Patent No. 55954), depending on the pressure of the piston. Spring automatic lubrication device is simply lubricated by the pressure of the spring and the suction force according to the rotation of the bearing, there is a fluctuation in the oil supply during operation, the error due to the vibration of the machine at high speed rotation, as well as remote Although installation often fails to refuel, it is difficult to know whether it is impossible to refuel.

Gas pressure type automatic lubrication device has been developed to compensate for this disadvantage of the spring type automatic lubrication device. That is, in the conventional gas pressure type automatic lubrication device, when there is no fueling, there is no safety device or alarm device for the lubrication, and as a result, lubrication is impossible and the machine is destroyed or the plant is stopped.

In addition, in order to avoid such a problem, there was a case where a pressure relief valve was installed (US Patent No. 4,023,648), but there was no function to warn the operator of the state where the lubricant was not injected.

Conventional gas pressure type automatic lubrication device does not detect lubricating oil by clogging the lubricating oil inlet pipe or stuck foreign matter in the bearing housing. The internal pressure will rise excessively.

Therefore, if the manager fails to take the necessary measures in a timely manner, the mechanical wear of the lubrication point is severe and the machine is damaged.

In addition, when the internal pressure of the lubricating oil injector rises excessively, the lubricating oil injector ruptures, and the lubricating oil or the electrolyte for gas generation therein is scattered around the injector. These scattered electrolytes and lubricants not only contaminate machinery but can also contaminate the product, resulting in huge economic losses.

The fatal flaw of such automatic lubrication devices leads to a lack of reliability and limited application, as well as dilution of the concept of automation.

The present inventors have proposed an automatic lubrication device to solve the defect of the existing product in Korean Patent Application No. 93-15394. 6 shows such a configuration. The automatic lubrication apparatus 100 is installed inside the hollow housing 111 and the hollow housing 111 and filled with a lubricant 112, and has a bellows type lubricant container having an oil hole 113 formed at a lower end thereof. 114, the piston 115 provided in the upper part of the lubricant container 114, the gas chamber 116 provided in the upper part of the piston 115, the electrolyzer 117, and the control switch 118 are comprised. The electrolyte is contained in the electrolytic cell 117.

When the control switch 118 is turned on, a constant current is supplied to the electrolytic cell 117 to electrolyze the electrolyte 119 in the electrolyte 117 to generate gas, which enters the gas chamber 116 and expands the gas chamber 116. The piston 115 is pushed downward so that the lubricant 112 inside the lubricant container 114 is supplied through the oil inlet 113, and the automatic lubrication device 100 has a pressure in the gas chamber 116 set at a maximum pressure. It is characterized by having a pressure sensing device 136 and a current blocking device 134 to sense the rise if the above rises to cut off the current supply to the electrolytic cell 117.

The pressure sensing device 136 and the current blocking device 134 block the current to the electrolytic cell 117 while the warning light 121 flashes at a faster rate than usual, so that the operator can know that there is an abnormality in the lubrication state. .

In addition, the housing 111 is constituted by the lower portion 122 and the cover 124. The cover 124 has an opening for accessing the control switch formed on the top of the control switch 118, into which the upper cap 126 having an O-shaped ring 125 is fitted.

The piston 115 is configured such that the bottom thereof is integrally coupled with the upper surface of the lubricant container 114 and has the same inclination as the bottom surface of the housing 111 so that the lubricant contained in the lubricant container 114 can be completely filled with no residue. Have sides

An inlet reinforcing member 128 having a screw cylindrical portion 127 having an external screw is attached to the oil inlet 113 at the lower end of the housing 111 to prevent damage to the vicinity of the inlet due to vibration or shock during machine operation. It is. The electrolysis device 130 includes a battery (not shown), an electrolytic cell 117 containing an electrolyte 119, the electrode 131 and the lower electrode 132, and an amount of current supplied to the electrodes. It is composed of a control switch 118 and a circuit board 133 to be adjusted.

By the way, a problem in devising an automatic lubrication device (Fig. 8, 100) is contamination of the lubricant. If the internal pressure of the lubricator is abnormally increased in case of refueling, the electrolysis is stopped to prevent the pressure from rising anymore and the warning lamp flashes to inform the operator of the situation. There was a possibility of contamination, and the lubricant was filled in a separate bellows-type container so as to be insulated completely from the electrolyte or the generated gas.

Such a design has been considered for safety, but the cost of manufacturing the bellows-type container separately filled with lubricant and the complicated manufacturing process have caused the cost to increase and the productivity to fall.

Therefore, as a result of research to make a product that can be cheap and easy to produce high reliability, the following has been devised, and according to the present invention, the residual amount of lubricant can be easily identified even in a dark place.

In the present invention, if the piston of the conventional lubrication device (Fig. 6: 115) only pushes the bellows type lubricant container, and the bellows type lubricant container is not installed separately, it is possible to prevent contamination of the lubricant container. It was made with the idea that it could be done.

The object of the present invention is to solve the problems of the prior art, to provide an automatic lubrication device that is easy to manufacture, reliable, inexpensive, and also easily checks the amount of lubricant remaining in the dark.

The object of the present invention can be achieved by the construction of the present invention by inserting a flexible and elastic sealing member such as rubber between the piston and the housing wall to maintain airtightness as described in claim 1.

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

The automatic lubrication apparatus 10 of the present invention shown in FIG. 1 and FIG. 2 has a hollow housing 11 having an oil filling hole 13 formed at a lower end thereof, and a piston installed on the hollow housing 11. 15, a gas chamber 16 provided on the upper portion of the piston 15, an electrolytic cell 17, and a control switch 18. The electrolyzer 17 contains an electrolyte 19 which generates gas when a voltage is applied.

When the control switch 18 is turned on, a constant current is supplied to the electrolytic cell 17 to electrolyze the electrolyte 19 in the electrolytic cell 17 to generate gas, enter the gas chamber 16, expand the gas chamber 16, and expand the piston 15. ) Is pushed downward so that the lubricant 12 inside the housing 11 is supplied through the filling port 13.

When the pressure in the gas chamber 16 rises above the set maximum pressure, the pressure sensing device 36 detects this and the current interrupting device 34 blocks the supply of current to the electrolyzer 17. When the current blocking device 34 cuts off the current to the electrolytic cell 17, the warning lamp 21 blinks at a faster rate than usual, so that the operator can easily recognize the abnormality of the lubrication state.

The housing 11 and the battery chamber B are welded by, for example, an ultrasonic welding machine. An opening for accessing the control switch 18 is formed in the cover 24 of the battery chamber B, and the upper cover 26 is fitted through the gasket 25A so that foreign matter from the outside to the inside of the housing is formed. Prevent mixing

An injection hole reinforcing member 28 having a cylindrical portion 27 is attached to the injection hole 13 at the lower end of the housing 11 in order to prevent damage to the injection hole 13 part due to vibration or shock during operation of the machine.

The electrolysis device 30 is supplied with a battery (not shown), an electrolyzer 17 incorporating an electrolytic cell 19, an upper electrode 31, a lower electrode 32, and electrodes 31, 32. It is composed of a control switch 18 and a circuit board 33 to allow the operator to adjust the amount of current.

3 is a perspective view of the piston ring 38 assembled in the groove 37 (FIG. 2) formed on the outer surface of the piston 15. FIG. 3A is a partial sectional view taken along the line A-A of FIG. 3 and 3A, the piston ring 38 has an X-shaped cross section consisting of a convex portion 38A and a concave portion 38B. The zero ring is used for the airtightness and gasket of general industrial machine elements, while the X ring is used for the airtightness and activity of the mechanical elements of the aircraft. It has excellent lubricity and airtightness, as well as excellent oil removal. In addition, the X-ring can support two points on the cross section, which is superior to the concentricity and eccentricity prevention, compared to the one-point support type 0 ring, which helps to move the piston straightly.

The inventors record the pressure at which the air starts leaking by inserting a rubber ring by inserting a rubber ring around the piston (Figure 3), pushing the piston with the rubber ring into the housing, closing the lid, and then applying air pressure from the outside. By comparing the airtightness according to the structure and material of the sealing material. One side of the rubber ring was tested in various ways such as round, oval, square and X-shape. At f / cm ² , the X ring with cross section is 4 kg. Leakage was started at f / cm ² and other shapes were found to start leaking between these values.

As a result of comparing the pressure at which the stopped piston started to move, the cross section was the highest in the square, and the circular and the X were 0.3 kg each. f / cm ² and 0.2 kg. As f / cm ² , the X ring was the best in terms of dynamic friction.

This result can be explained by the special structure of the X ring, which is highly airtight because the two convex parts contact the wall, and the two convex parts are more tightly adhered to the wall under pressure, thereby ensuring airtightness. will be.

In other words, such an X ring can have the same effect as using two zero rings even if only one is used, which is most suitable for oil removal and airtightness of the cylinder inner wall. In addition, the X-shaped sealing ring has a small contact area with the housing wall, and can contain a lubricant between the two convex portions while maintaining a lubricated state because the contact area with the housing wall surface is smaller, so that the frictional friction is the least.

From the above experimental results, it was confirmed that attaching the rubber ring to the piston maintains hermeticity to some extent and can manufacture a practical automatic lubrication device. Then, the internal pressure of the lubrication device 5 to 6 kg. If it can be increased to f / cm ² , foreign matter may be inserted into the lubricating oil inlet pipe or the bearing housing to push the lubricating oil to its own pressure to reduce the labor of the manager even when oil is not supplied.

Therefore, a method of suppressing expansion of the housing was tested in order to further improve airtightness to withstand this pressure. That is, as a result of testing the housing made of fiber-reinforced synthetic resin, the 0 ring was 3 kg. up to f / cm ² , X ring weighs 7 kg. It was confirmed that airtightness was maintained even in f / cm ² or more.

In the case where the inner diameter of the housing is not expanded even when the internal pressure is increased by increasing the tensile strength of the housing material, even if the 0 ring, which is generally used, is used, the airtightness is slightly reduced, but it is not a big problem in practical use. However, the X ring is the best sealing material to prevent contamination of the lubricant.

In addition, when mixing rubber raw materials, a rubber ring is prepared by mixing phosphorescent or fluorescent finishes, or when the pigment is applied to the concave side of the X ring and the housing 11 is formed of a transparent or translucent material, the rubber ring is easily visible even in a dark place. do. Therefore, the position of the lubricator itself as well as the position of the lubricator itself can be easily identified by the position of the X ring that emits light, so that it is more convenient to manage the lubrication device installed in a difficult or dark place.

The piston ring 38 may be formed in two or more along the longitudinal direction of the piston 15 to ensure the seal and to allow the piston 15 to be lowered vertically.

The bottom shape of the piston 15 is formed at the same inclination angle as the inclination angle of the lower inclined surface 22 of the housing 11 so that all of the lubricant in the housing 11 can be lubricated without a residual amount. The inlet reinforcing member 28 is formed in the inlet 13 at the lower end of the housing 11 in order to prevent damage in the vicinity of the inlet due to vibration or shock during machine operation. The cylindrical portion 27 of the inlet reinforcing member 28 has a screw portion formed on the outer surface thereof, and a stopper 29 for preventing lubricating oil leakage during the lubrication device storage and transportation is fastened.

4 is an enlarged cross-sectional view of the configuration of the pressure sensing device 36 and the current blocking device 34. The pressure detecting device 36 includes the current blocking device 34 when the gas pressure exceeds the set maximum pressure level. It consists of a switch actuator 40 to operate.

The switch actuator 40 is provided on the upper part of the electrolytic cell upper electrode 31 and formed on the side wall of the stem 41 and the stem 41 which is only operated upward when the gas generated in the electrolytic cell 17 exceeds the set maximum pressure. It consists of the ring 43 accommodated in the ring accommodation groove 42, and the compression spring 44.

When the gas pressure is elevated above the set maximum, the stem 41 rises while compressing the spring 44 to activate the current blocking device 34 disposed thereon to block the flow of current to the electrolytic cell 17 and to warn the lamp. 21) to make the flashing faster.

5 shows the use of the switch actuator 40 'of another embodiment in the pressure sensing device 36 of the pressure sensing device 36 and the current interruption device 34 of FIG. The through hole 44 was formed in the bottom surface of '), the ball 45 was arrange | positioned at the upper part, and the reverse conical spring 46 was provided above the ball 45. As shown in FIG. By arranging a flexible membrane 47 at the upper end of the switch actuator 40 ', when the gas pressure is boosted above the set maximum, the ball 45 rises while compressing the spring 46, thereby increasing the pressure inside the switch actuator and thereby As the film 47 rises, the current blocking device 34 disposed above the flexible film 47 is operated to block the flow of current to the electrolytic cell 17 and to accelerate the blinking of the warning lamp 21.

Since the automatic lubrication device 10 of the present invention installs a sealing ring 38 on the outer circumference of the piston and uses the space below it as a lubricant container, a separate bellows type lubricant container is unnecessary, and the automatic lubrication due to the light emitting elastic ring It is easy to see the consumption of lubricants charged into the device and its interior.

Claims (6)

A hollow housing 11 having an oil filling hole 13 formed at a lower end thereof, a piston 15 provided at an upper portion of the hollow housing 11, a gas chamber 16 provided at an upper portion of the piston 15, It consists of an electrolyzer 17 and a control switch 18. When the control switch 18 is turned on, a constant current is supplied to the electrolyzer 17, and the electrolyte 19 in the electrolyzer 17 is electrolyzed to generate gas. In the automatic lubrication device in which the gas enters the gas expansion chamber 16, expands the gas expansion chamber 16 and pushes the piston 15 downward so that the lubricating oil 12 is supplied through the filling port 13. A sealing ring receiving groove is formed in the side wall of the piston 15 in the circumferential direction so that the elastic sealing ring 38 is accommodated in the groove, and a space between the inside of the housing 11 and the lower end surface of the piston 15 forms a lubricant container. Automatic lubrication apparatus characterized by the above-mentioned. The automatic lubrication apparatus according to claim 1, wherein the elastic sealing ring is a cross-section X-shaped ring. The pressure sensing and current interrupting device 32 according to claim 1 or 2, which interrupts the supply of current to the electrolytic cell when the pressure in the gas expansion chamber 16 rises above a predetermined maximum, and warns the worker thereof. The main body is provided with a warning light 21, and the pressure sensing and current interrupting device 32 interrupts the supply of current to the electrolytic cell when the pressure in the gas expansion chamber 16 rises above a predetermined maximum, and at the same time flashes the warning light 21. Automatic lubrication device, characterized in that to enable the operator to know the lubrication abnormality rapidly. 3. Automatic lubrication device according to claim 2, characterized in that the housing (11) is made of a transparent to translucent material capable of transmitting light, and the X-shaped elastic sealing ring is formed by compounding a photoluminescent pigment. The automatic lubrication apparatus according to claim 2, wherein the X-shaped elastic sealing ring is coated with a fluorescent material at least in the concave portion of the cross section. The automatic lubrication apparatus according to claim 1, wherein the housing is made of fiber reinforced synthetic resin.