KR100397071B1 - Automatic grrase pourer - Google Patents

Abstract

The present invention is to pressurize and terminate the hydraulic line in one hydraulic line so that the grease in the container can be discharged by a certain amount at regular intervals, the present invention is formed by shortening the distance between the supply end and the discharge end of the grease at the time of initial operation In order to smoothly operate, the operation time of filling the air into the passages formed inside the supply end and the discharge end of the device to drain the air and to reduce the remaining grease without being discharged from the inside of the device and press-in to discharge the grease The main drive source in double-winding of the piston is made by pressure, which makes it semi-permanent.

Description

Automatic grease pourer

The present invention relates to an automatic grease injector, and more particularly, to an automatic grease injector which discharges a predetermined amount of grease in a container by being pressurized and terminated by one hydraulic line.

In general, grease is used as a lubricating agent for the low speed and high speed lubrication parts of various construction and industrial machinery, and the grease has an advantage of easy lubrication and sealing, a semi-solid form, and viscosity, so that the lubrication effect lasts for a long time.

In general, grease is injected in a fixed amount at regular time without continuous lubrication, and a manual grease injector called grease gun is used for such injection.

The manual grease injection method using the grease gun involves injecting grease into the container, connecting the grease outlet to the grease nipple connected to the lubrication part to be injected, and rotating the handle by hand to transfer grease in the container to the lubrication part. Done.

A sufficient amount of grease is injected at one injection. If the lubrication part is poorly sealed, grease may leak out of the lubrication surface. In addition, in the case of a lubrication part without a sealing device such as a pin joint, the gap space where grease can be filled is not large enough so that most of the injected grease may remain in the grease feed path or leak out of the lubrication surface gap.

Therefore, effective lubrication is performed for a certain period of time after the grease injection, but as the grease is pushed out of the lubricating surface as time passes, the lubrication performance is deteriorated, and the operation of the operating parts may not be smooth, and wear may occur.

The structure and operation of such a conventional manual grease injection device is formed with a discharge chamber in the body of the injection device. The body is provided with a reciprocating plunger to pressurize the grease in the discharge chamber. One end of the body is provided with a ball and a spring that is open only when the grease in the discharge chamber is compressed and transported to the outside of the discharge chamber serves as a check valve.

Also, at the end of the plunger, a handle is hinged to facilitate its operation, and the end of the handle is hinged to the body by a link. According to this configuration, when the operator presses the handle, the plunger is moved to compress the grease in the discharge chamber, and the spring is compressed as the pressure is applied to the ball.

In this way, as the ball moves and the contact surface is opened, grease is transferred to the grease outlet through the gap around the ball. Conversely, if the plunger moves in the opposite direction after the discharge stroke of the grease and the volume of the discharge chamber increases, the spring expands as the pressure in the discharge chamber drops below atmospheric pressure.

As the spring expands, when the ball is moved to be in close contact with the contact surface, grease remaining in the discharge port cannot return to the discharge chamber, and the discharge chamber is in a vacuum state.

Thereafter, when the plunger continues to move upward, the grease suction port is opened and at the same time the grease in the container is supplied to the discharge chamber. As the grease flows into the discharge chamber, the degree of vacuum inside thereof decreases, that is, the pressure in the discharge chamber is increased, and the grease cannot be sufficiently layered therein. In this way, if grease is not completely layered in the discharge chamber, the amount of grease discharged in subsequent discharge strokes may be insufficient.

This phenomenon is also aggravated with higher grease viscosity. To solve this problem, the handle is equipped with a piston and a spring with a handle. Accordingly, the grease in the container is one in which grease can be forcibly supplied to the discharge chamber by a spring or by force.

In addition, when refilling the grease in the injection device, the container is released from the body, the handle is pulled back to retract the piston, and the syringe is sucked and filled with grease in the container.

However, such a recharging operation is very cumbersome and inconvenient, and when there are several parts to be injected with grease, this operation has to be repeated several times, thereby degrading workability.

On the other hand, recently supplemented with the disadvantages of the manual grease injection device described above, Korean Utility Model Application No. 98-12170 and European Patent Registration EP 0 857 910 A1 have been proposed or some of these automatic injection device has been developed.

Most of these automatic grease injection devices are driven by electric drive or hydraulic system, and only a small amount of grease is discharged every few hours and supplied to the lubrication unit to prevent the waste of grease and continuously lubricate the lubrication part. It is configured to prevent the trouble and reduce the trouble of manual grease filling device.

However, this automatic injection device is formed far from the grease inlet and outlet, so that the grease is filled in the passage formed in the inlet and outlet of the device to draw out air in order to operate the device smoothly during initial operation. It takes too much time to carry out the operation, and there are many disadvantages of remaining grease without being discharged from the inside of the device, and the main drive source of the piston to inject the grease is made by the elastic force of the spring. There was a limit to malfunction.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to shorten the distance between the inlet end and the outlet end of the grease so as to smoothly operate the device during the initial operation. Work time to remove air by filling the air, and to reduce residual grease without being discharged from the inside of the device, and to return the main drive source of the press-fitted piston to discharge the grease An automatic grease injection device is provided.

1 is a perspective view showing the appearance of the present inventors automatic grease injector.

Figure 2 is an exploded perspective view of the present inventors automatic grease injector.

3 is a front sectional view of an automatic grease injector to which the technique of the present invention is applied.

4A is a front sectional view of a housing that is a main part of the present invention, and FIG. 4B is a partially cutaway plan view.

5A is a cross-sectional view taken along the line A-A of FIG. 4A, FIG. 5B is a cross-sectional view taken along the line B-B of FIG. 4A, and FIG. 5C is a cross-sectional view taken along the line C-C of FIG. 4A.

Figure 6 is a perspective view showing the structure of the adapter which is the main part of the present invention.

Figure 7 is a perspective view showing the structure of the main piston which is the main part of the present invention.

8A to 8E are cross-sectional views showing an operating state of the automatic grease injector of the present invention.

※ Explanation of code for main part of drawing ※

20: manual injection passage

22: grease supply passage 22a: grease discharge passage

23: grease filling space 24: first space

25: second space part 26: connecting passage

26a: first connection path 26b: second connection path

27: main valve body installation space portion 27a: groove portion

28: flow rate / fluid supply passage 29: flow rate / fluid discharge passage

29a: first outlet 29b: second outlet

29c: transfer path 30: grease holder

31 body 32 fixed plate

33: uneven portion 34: grease inlet

35: spring ring 40: discharge amount adjustment member

40a: Adjust nut 41: Head part

42: grease amount adjusting portion 43: rod portion

44: stopper portion 50: piston

51: first groove 52: second groove

53: first rod 54: second rod

60: adapter 61: body

62: first groove 63: second groove

65: through hole 66: through hole

66a: stepped groove 80: main valve

80a: elastic spring 81: shaft

82: operator 83: pressure groove (83)

An object of the present invention is a grease holder having a fixing plate fixed to the housing below the body for fixing the grease container and having a grease inlet through which grease is supplied to the body and the center of the fixing plate; A grease supply passage is formed downwardly in communication with the recess where the grease holder is installed, and an end thereof is connected to the grease filling space and forms a grease discharge passage in a direction opposite to the grease supply passage. A first space is formed, and a second space part is formed on the other side, and a predetermined portion forms a main valve body installation space part parallel to the first space and connected by a connecting passage, but one side part is extended to the second space part to supply the flow rate / fluid supply. A housing in which a groove is formed to be connected to the furnace, a flow / fluid discharge path is formed to be spaced apart from the flow / fluid supply path, and the manual injection path is connected to the manual inlet at a predetermined portion; A grease plate having an upper portion wider and narrower toward a lower portion thereof and installed between the housing and the grease holder; Discharge amount adjusting member formed integrally with the head portion forming the oblique portion to which the adjust nut is screwed together, and a grease amount adjusting portion to be screwed together with the spiral portion formed on the inner circumferential surface of the second space and protruding a stopper portion at the end of the rod portion passing through the through hole. Wow; A first groove is formed at one side of the outer circumferential surface of the body, and a second groove is formed at one end thereof to be connected to the first groove, which is formed in communication with the inner space, and the rod of the piston penetrates through the other side of the second groove. An adapter forming a through hole communicating with the ball and the flow rate / fluid supply path; On one side of the outer circumferential surface is formed a plurality of first grooves at equal intervals, the first groove is formed in communication with the second groove in the center and the first rod is integrated with the first rod to the other side of the groove A piston consisting of a second rod; A main valve formed with an integrally formed actuator having one side tapered to one side of an axial rod having a predetermined length such that an elastic spring is installed and a pressurized groove formed in the axial rod direction at the center of the tapered surface; A check valve furnace installed at each of the grease supply passage and the grease discharge passage; It is achieved by an automatic grease injection device, characterized in that the furnace plug for preventing the removal of the components installed in the first space and the main valve body installation space.

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

1 is a perspective view showing the appearance of the automatic grease injector of the present invention, FIG. 2 is an exploded perspective view of the automatic grease injector of the present invention, and FIG. 3 is a front sectional view of the automatic grease injector to which the technique of the present invention is applied.

According to the present invention, the automatic grease injection apparatus 1 includes a grease holder 30 for fixing the grease container 100, a housing 20 for introducing and discharging grease in the grease container by a predetermined amount, and the discharge amount of the grease. A discharge amount adjusting member 40 for adjusting the pressure, a piston 50 installed inside the housing 20 to discharge grease introduced / supplied, an adapter 60 for preventing the flow of the piston 50, and It is composed of a main valve (80) for adjusting the operation direction of the piston (50).

The structure of the grease holder 30 is an O-ring is installed at the front end of the opening of the inner space of the body 31 into which the grease cylinder 100 is inserted, and a spring ring to prevent the grease cylinder 100 from being separated. 35 is installed and provided with a fixing plate 32 integrally fixed to the housing 20 below, the lower surface of the fixing plate 32 in forming the uneven portion 33, the fixed plate 32 and the uneven portion ( At the center of 33), a grease inlet 34 communicating with the space portion is formed.

The structure of the housing 20 forms a grease supply passage 22 downwardly in communication with the recessed portion 21 formed in the flat portion on which the grease holder 30 is installed, as shown in FIGS. 4 and 5. The end is connected to the grease filling space 23 and forms a grease discharge passage 22a in a direction opposite to the grease supply passage 22, and has a first space 24 on one side around the grease filling space 23. And a second space portion 25 on the other side, and a predetermined portion of the main valve body installation space portion 27 connected in parallel with the first space 24 and connected by a connection passage 26, but one side portion is formed. A groove portion 27a is formed to extend toward the second space portion 25 to be connected to the hydraulic supply path 28 and the flow rate / fluid discharge path 29 is formed to be spaced apart from the flow rate / fluid supply path 28 by a predetermined distance. It is a structure, and a predetermined part of the housing is connected to a manual inlet for filling grease into each passage before initial operation. A structure in which the passage mouth (20a).

The manual injection passage 20a has a structure connected to the grease supply passage 22, and the connection passage 26 includes a first connection passage 26a and a second connection passage 26b, and the flow rate / fluid The discharge passage 29 is connected to the main valve body installation space 27, and the flow / fluid discharge passage 29 also has the first discharge passage 29a and the second discharge passage 29b as in the connection passage 26. It consists of and is connected to one conveying path (29c).

On the other hand, the structure of the discharge amount adjusting member 40 is formed on the inner circumferential surface of the second space 25 which is in communication with the grease filling space 23 integrally with the head portion 41 formed with an oblique line to which the adjust nut 40a is screwed. A piston 50 is formed at an end of the rod portion 43 that forms a grease amount adjusting portion 42 to be screwed with the formed spiral portion, and penetrates through a hole of a partition wall partitioning the grease filling space 23 and the second space 25. The stopper part 44 which stops) is protruded.

On the other hand, the upper portion is wider and the passage (71) is formed narrower toward the lower portion and the passage 71 is formed an extension passage 72 extending horizontally so that the grease plate 70 between the housing 20 and the grease holder (30) ) Is installed.

Meanwhile, as shown in FIG. 6, the adapter 60 forms a first groove portion 62 extending in the longitudinal direction on one side of the outer circumferential surface of the body 61 and at one end thereof with the first groove portion 62. A second groove portion 63 having a hemispherical cross section is formed to be connected, but the second groove portion 63 is formed to communicate with the inner space 64, and the through hole through which the rod of the piston 50 passes in the other direction of the second groove portion 63. It is a structure in which 65 is formed.

Meanwhile, a portion where the inner space 64 and the through hole 65 are in contact with each other, for example, has a through hole 66 communicating with the flow rate / fluid supply path 28, but has an inner diameter in the outer surface direction than the through hole. This step is a structure in which the stepped grooves 66a formed slightly larger.

On the other hand, the piston 50 has a plurality of first grooves 51 are formed at equal intervals on one side where the O-ring is installed on the outer circumferential surface as shown in FIG. 7, but the first grooves 51 are The first rod 53 formed in communication with the second groove 52 of the center portion and the second rod 54 integrated with the first rod 53 on the other side of the first groove 51.

The main valve 80 has a structure in which the operator 82 having a tapered surface on one side thereof is formed integrally with one side of the shaft rod 81 having a predetermined length so that the elastic spring 80a is installed. One side of the ruler 82 is preferably used to form a pressurized groove 83 which is dug in the axial direction, and the grease supply passage 22 and the grease discharge passage 22a respectively have check valves 90 and 91. ) Is installed.

The first space 24 and the main valve body installation space 27 has a structure consisting of low-plugs (10, 11) to prevent the removal of components.

In the drawings, reference numeral 13 denotes an O-ring for maintaining airtightness, and 13, 14, and 15 are connection connecting members for connecting to a separate device.

Referring to the operation and effect of the automatic grease injection device 1 of the present invention configured as described above is inserted in the center portion 21 of the recessed portion 21 of the housing 20, as shown in Figure 8a attached to the center coincides with In this state, the fixing plate 32 is fixedly installed in the housing 20, and then the grease container 100 is inserted into the space provided in the body 31 of the grease holder 30 to insert the grease container 100 and the grease. The centers of the inlet 34 and the grease supply passage 22 are matched.

Connect the manual grease injector to the manual injection member connected to the grease supply path 22 to remove the air filled in each passage of the housing 20 in the state where the center is aligned as described above. Fill through.

As described above, at the same time as the air remaining inside the housing 20 is removed, the grease filled in the grease container is moved to the lower side, wherein the grease plate 70 installed between the housing 20 and the grease holder 30 is moved. Grease supply passage while the grease pressurizes and opens the 첵 valve 90 in which a predetermined portion is placed inside the extension passage 72 in a state in which pressure is generated because it is gathered toward the center by the passage 71 of the 22) It is drawn in.

The grease passing through the grease supply path 22 by opening the check valve 90 is introduced into the grease filling space 23 to fill the grease filling space 23, and at this time, grease filling the grease filling space 23. By the piston 50 is moved in one direction.

The piston 50 is moved in one direction because the pressure in the first space 24 is in a low pressure state, and when grease is filled in the first space 24, a separate flow rate connected to the flow / fluid supply connecting member 14 is provided. The flow rate supplied by the fluid supply device (not shown in the drawing) flows into the groove portion 27a along the flow rate / fluid supply path 28.

More specifically, as shown in the accompanying drawings, FIGS. 8A to 6, the high pressure flow rate / fluid introduced into the flow rate / fluid supply path 28 is formed through the center of the through hole 66 of the adapter 60 installed in the first space. Since they are installed in the same manner, they pass through the through-hole 66 on one side and enter the inner space 64 of the body 61 of the adapter 60, and are then transferred to the groove portion 27a through the through-hole 66 in the other direction. .

The high pressure flow rate / fluid to be transferred to the groove portion 27a is installed in the main valve body installation space 27 to attach the operator 82 of the main valve 80 closing the groove 27a to FIG. 8B. As shown in the drawing, the main valve 80 moved by the pressure of the flow rate / fluid is moved while pressing the elastic spring 80a fitted to the shaft rod 81.

At this time, since one side of the operator 82 is formed with a pressing groove 83 which is dug in the axial direction, the flow rate / fluid enters the pressing groove 83 to easily pressurize the main valve 80 to one side. Will be moved.

When the main valve 80 is pushed by the hydraulic pressure to open the groove 27a, the first connection path 26a and the hydraulic discharge path are opened at the same time while the second connection path 26b constituting the connection path 26 is opened. The 2nd discharge path 29b which comprises (29) is simultaneously closed.

Meanwhile, when the main valve 80 is moved as described above, as shown in FIG. 8C, the first connection path constituting the connection passage 26 is compressed while the flow rate / fluid in the main valve body installation space 27 is compressed. The low pressure flow rate / fluid is discharged to the tank connected by the connecting member 13 via the discharge transfer path 29c at 26a.

On the other hand, the high-pressure flow rate / fluid drawn through the open groove (27a) is moved to the inside of the main valve body installation space 27 and the housing through the second connection path (26b) constituting the open connection passage 26 It enters into the 1st space part 24 of (20).

At this time, the high pressure flow rate / fluid drawn into the first space part 24 is interrupted by the adapter 60 installed inside, which is shown in FIG. 6 of the body 61. As shown in FIG. 8D, the first groove portion 62 is formed to extend in the longitudinal direction, and is introduced into the inner space 64 via the second groove portion 63 formed perpendicularly to an end thereof. At this time, the piston 50 installed in the inner space of the adapter is moved by pressing in one direction.

Looking at the movement of the piston 50, the flow of high pressure flow / fluid introduced into the inner space of the adapter 60 is introduced into the second groove 52 formed in the piston through the first groove 51, the second groove ( As the flow rate / fluid drawn into 52 is filled in the first groove 52 having a small volume, the piston moves the flow rate / fluid in the opposite direction to the inlet direction by the pressure.

When the piston 50 is moved by a high pressure flow / fluid, the rod part 54 penetrating through the through hole 65 of the adapter 60 is introduced into the grease filling space 23 and the grease filled in the space is drawn. Will be compressed.

The compressed grease discharges grease to the grease inlet 22 and the grease outlet 22a due to the increased pressure in the sealed volume. At this time, the grease supply passage 22 and the grease discharge port 22a have a check valve. The grease is discharged through the grease discharge port 22a while opening the check valve 90a provided at the grease discharge port 22a and no longer flowing back to the grease supply passage 22 because 90 and 90a are provided.

On the other hand, adjusting the discharge amount of the grease is controlled by the discharge amount adjusting member 40 installed in the second space portion 25.

Looking at the operation of the grease discharge amount control 40, when the discharge amount adjusting member 40 is rotated in the clockwise direction, the grease amount adjusting portion 42 which is combined with the spiral formed on the inner circumferential surface of the second space 25, the piston 50 Moved toward the distance between the stopper portion 44 formed in the rod portion 43 and the end of the rod portion 54 of the piston 50 is closer, the discharge amount is reduced, on the contrary, when rotated counterclockwise, the discharge amount adjusting member ( 40 is far from the end of the piston 50, so that the space 23 is widened by that, the amount of grease discharge will increase.

On the other hand, when a predetermined amount of grease is discharged to the lubrication part by the piston 50, the high pressure hydraulic pressure is stopped and at the same time as the hydraulic pressure is stopped, as shown in FIG. The main valve 80 is restored to its original position by the pressure of the elastic means and the elastic force of the elastic means 80a.

At the same time as the main valve 50 is restored, the second connection path 29b and the groove 27a are closed while the first connection path 26a and the first discharge path 29a which are closed are opened.

The operation described above is repeated several times to automatically supply grease, and the operation method of extracting air remaining inside the housing 20 by the manual grease injector described above is described, but without using the grease injector. In addition, if the operation of the present invention is repeated several times, the passage in the housing 20 may be filled.

The present invention, which is configured and operated as described above, is capable of discharging the grease in the container by a certain period so as to be pressurized and terminated by one hydraulic line, and to form a short distance between the grease supply end and the discharge end. In order to discharge the grease and to reduce the remaining grease without being discharged to the outside and inside of the device to discharge air by filling grease in the passages formed in the supply and discharge ends of the device for smooth operation of the device. When the main drive source of the inflated piston is driven by pressure, it can be used semi-permanently.

Claims (5)

A grease holder having a fixing plate fixed to the housing at a lower side of the body having a spring-ring installed therein to prevent separation of the grease barrel, and having a grease inlet for supplying grease to the body and the center of the fixing plate; A grease supply passage is formed downwardly in communication with the recess where the grease holder is installed, and an end thereof is connected to the grease filling space and forms a grease discharge passage in a direction opposite to the grease supply passage. A first space is formed, and a second space part is formed on the other side, and a predetermined portion forms a main valve body installation space part parallel to the first space and connected by a connecting passage, but one side part is extended to the second space part to supply the flow rate / fluid supply. A housing in which a groove is formed to be connected to the furnace, a flow / fluid discharge path is formed to be spaced apart from the flow / fluid supply path, and the manual injection path is connected to the manual inlet at a predetermined portion; A grease plate formed between the housing and the grease holder, the upper part having a wider passage and a narrower passage toward the lower side, the passageway extending horizontally to form an extension passage; Discharge amount adjusting member formed integrally with the head portion forming the oblique portion to which the adjust nut is screwed together, and a grease amount adjusting portion to be screwed together with the spiral portion formed on the inner circumferential surface of the second space and protruding a stopper portion at the end of the rod portion passing through the through hole. Wow; A first groove is formed at one side of the outer circumferential surface of the body, and a second groove is formed at one end thereof to be connected to the first groove, which is formed in communication with the inner space, and the rod of the piston penetrates through the other side of the second groove. An adapter having a through hole communicating with the ball and the flow / fluid supply path; On one side of the outer circumferential surface is formed a plurality of first grooves at equal intervals, the first groove is formed in communication with the second groove in the center and the first rod is integrated with the first rod to the other side of the groove A piston consisting of a second rod; A main valve having one side formed with an integrally formed actuator having one side tapered to one side of an axial rod having a predetermined length such that an elastic spring is installed, and a pressurized groove formed in the axial rod direction at the center of the tapered surface; A check valve furnace installed at each of the grease supply passage and the grease discharge passage; Automatic grease injection device, characterized in that made of a low-plug to prevent the removal of the components installed in the first space and the main valve body installation space. The main valve of claim 1, wherein the connecting passage supplies the first connecting passage for supplying and feeding the flow rate / fluid supplied to the front end of the main valve body installation space to the first space and the flow rate / fluid supplied to the first space. Automatic grease injection device, characterized in that consisting of a second connecting passage for moving to the rear end of the body installation space. The automatic grease injection apparatus according to claim 1, wherein the flow rate / fluid discharge passage is formed of first and second discharge passages and connected to one transfer passage. The method of claim 1, wherein the adapter is orthogonal to the space portion and formed with a connection hole for connecting the flow rate / fluid supply path connected to the groove and the flow rate / fluid supply path for supplying the flow rate / fluid to the tank Automatic Grease Filler. The automatic grease injection apparatus according to claim 1, wherein a rectangular connection groove is formed between the connection passage formed in the housing and the first groove portion formed in the adapter.