KR900002232Y1 - Grease supply device - Google Patents

Abstract

No content.

Description

Grease Feeder

1 is a cross-sectional view of a grease supply device showing an embodiment of the present invention.

2 is a perspective view of the cylinder portion of the statue.

3 is a perspective view of a retainer and a diaphragm.

4 is a cross-sectional view of the diaphragm.

5th side view of the statue.

6th side view of the statue.

7 is an enlarged cross-sectional view near the solenoid valve.

8 and 9 are cross-sectional views of the valve.

* Explanation of symbols for main parts of the drawings

1: grease supply device body 6: cylinder

8,39: plunger 6a: resin part

6b: sleeve 5a: pneumatic chamber

10: retainer 12: diaphragm

14: return spring 15: neck body

16: opening end 18: solenoid valve

34 supply valve seat 35 exhaust valve seat

36 valve 37 rod

41: spring 42: coil

43: plunger operating room 46: flaw of illusion

The present invention relates to a plunger type grease supply device for supplying grease to sliding surfaces such as bearing parts.

The grease supply device is a device for forcibly supplying grease to a plurality of lubrication parts by using a plunger type pump, and is widely used, for example, to lubricate a vehicle or the like.

As an example of this kind in the past, Japanese Utility Model Publication No. 58-89692 has been described.

In this example, the grease feeder main body is provided with a large diameter air cylinder and a small diameter oil cylinder at the center of the shaft such as this air cylinder. In the air cylinder, a cup-shaped piston fitted with a ring packing is arranged to slide in the left and right directions, and an oil cylinder is fitted with a plunger to form a pump chamber by the plunger and the oil cylinder.

The plunger is brought into contact with the piston by a return spring elastically mounted between the main body and a spring washer provided at the right end thereof, and the piston is always pressed in the right direction.

The right side of the air cylinder has a supply hole connected to the air pressure source through the solenoid valve. When the solenoid valve is opened and compressed air is supplied, compressed air acts on the piston to resist the piston against the return spring. The grease, which was pre-loaded in the pump chamber, is supplied to each oil supply point from the discharge passage. When the supply is completed, the solenoid valve is closed and the plunger is returned to its original position by the return spring. The grease is removed from the grease container in the pump chamber at the return stroke, and the preparation for supply of the next grease is prepared. Done.

In such a known example, in order to move the plunger, the inner surface of the air cylinder must be processed into a smooth surface, which requires effort to process, and the ring packing attached to the piston has deteriorated as the properties of the air cylinder deteriorate over time. There was a concern that the contact force of the furnace would be lowered and air would leak, resulting in poor operation.

Moreover, the apparatus became large and could not substitute for the request for downsizing.

Therefore, the present invention aims to reduce the number of airborne processes and to prevent air leakage and miniaturization.

The gist of the present invention is a grease feeder that lifts grease in a grease container by reciprocating the plunger in a cylinder and supplies the lifted grease to each gas station, and a retainer is installed at the opposite end of the cylinder of the plunger. The diaphragm is provided so that the return spring is disposed between the main body of the grease supply unit and the retainer, and the opening of the diaphragm is fixed to the main body, and the pneumatic chamber is formed on the opposite side of the cylinder by the diaphragm. In order to control the supply of air pressure through the solenoid valve.

Therefore, since the pneumatic chamber installed on the opposite side of the cylinder of the plunger is divided into diaphragms, the leakage of air is completely excluded. Since the piston is not used, it does not require machining of the inner surface of the cylinder. In addition, miniaturization is possible.

Other features of the present invention describe the most suitable embodiment as follows according to the drawings.

1 and 2 show a grease supply device, the main body 1 of which is formed of a resin, and the left portion 1a and the right portion 1b having the longitudinal cut surface 2 interposed therebetween are screw 3. And nut 4 are configured.

On the right side of FIG. 1 in the main body 1, a large diameter diaphragm movable chamber 5 with a central axis in the left and right directions is provided, and the same axis as the diaphragm movable chamber 5 is provided in the main body 1. In this case, a small diameter cylinder 6 is formed, and the right side of the cylinder 6 protrudes in the diaphragm movable chamber 5.

The cylinder 6 is formed of a resin part 6a and a metal sleeve 6b disposed therein, which sleeve 6b is molded at the time of molding the main body 1, 6b) again protrudes by L from the left end of the resin portion 6a. (7) is an annular groove for improving the bonding strength formed on the outer surface of the sleeve 6b.

The left end of the metal plunger 8 is bitten in the cylinder 6, and the pump chamber 9 is formed of the plunger 8 and the cylinder 6. The plunger 8 is a diaphragm 12 and the diaphragm which will be described below so as to have the retainer 10 and the retainer 10 in which the wood-shaped portion faces the cylinder 6 side at the right end thereof. The pressurized metal sphere 13 for pressing (12) and the screw 11 are firmly attached.

A return spring 14 is elastically mounted between the retainer 10 and the left end of the diaphragm movable chamber 5, and the plunger 8 has always been pushed to the right, but the plunger 8 is not operating. If not, you are on the right side.

The diaphragm 12 is coated with a resin or rubber on a cloth, and is particularly wood-shaped, as shown in FIGS. 4 to 6, and has an opening 15a and a side portion 15b constituting the neck body 15. ) Is about 0.5 mm thick, and the open end 16 has a thickness of about 5 mm square, and the side portion 15b near the open end 16 is formed somewhat thicker than the other side.

In addition, the hole 15c is formed in the center of the bottom part 15b of the wood main body 15, and the two protrusions 15d are formed inward from the periphery, and the opening end part 16 is formed. Two protrusions 16a are formed on one side of the edge.

Moreover, the taper movable is constructed in the side part 15b of the neck main body 15, and the taper angle is large formed in the vicinity of the opening end part 16. As shown in FIG.

As described above, the diaphragm 12 is attached to the right end of the plunger 8 so that the bottom portion 15a of the neck body 15 is sandwiched between the retainer 10 and the pressurized metal ball 13. At the same time, the open end 16 is attached so as to be sandwiched between the left 1a and the right 1b constituting the main body 1 described above, and the opening end 16 is attached to the open end 16. ) Is folded 180 degrees from the wooden frame 15.

Thus, as shown in FIGS. 1 and 3, the diaphragm 12 shows a state where the side portion 15b of the neck body 15 is bent at a sharp angle.

Moreover, as the plunger 8 is displaced, the bent position is released.

The diaphragm 12 has a diaphragm movable chamber 5 formed with a return spring 5a on the left side and a pneumatic chamber 5b on the right side, which is connected to an air pressure source not shown in the figure. The passage 17 is open.

The passage 17 is provided with a solenoid valve 18. By opening and closing the solenoid valve 18, the pneumatic chamber 5b can select the atmospheric pressure release and the connection with the pneumatic source.

The solenoid valve 18 is shown well in FIG. 7, and the valve actuating chamber 32 which accommodates the valve 36 mounted above the right side 1b of the grease supply apparatus main body 1 is a pneumatic source (illustration. The air passage 17 is formed by the connection hole 33 which connects to (none). The valve actuating chamber 32 was provided with a supply side valve seat 34 on the connecting hole 33 side from below, and an exhaust side valve seat 35 was provided on the opposite side thereof. By shifting in the direction, it is selectively installed on either valve seat to open or close the hole formed therein.

The valve 36 is as shown in FIGS. 8 and 9, and is made of rubber or the like, and the rod 37 is inserted into and fixed to the valve 36. In both of these embodiments, the rod 37 is formed by heat-treating rubber, but in Fig. 4, the support piece 43 is disposed.

The plunger 39 was in contact with the rod 37 and the top at the bottom thereof, and the coil 42 was formed, and was disposed in the plunger movable chamber 43 with the magnetic rod 44 fitted at the top thereof. It is flat and opposes the lower surface of the magnetic rod 44.

The plunger 39 has one end engaged with an annular groove 46 formed outwardly near the lower end thereof, and the other end thereof is supplied with the valve 36 by a conical spring 41 which abuts against the lower end side of the coil 42. It is pressed in the direction which presses against the valve seat 34 direction. Furthermore, 45 and 45 are terminals for power supply. In the non-excited state in which no current flows in the coil 42, as shown in the drawing, the valve 36 is pushed against the supply side valve seat 34 by a spring 41 which presses the plunger 39 so that the supply side is closed. Since the exhaust side is opened, the pneumatic chamber 5b is opened to the atmosphere from the exhaust hole not shown. In this state, grease is filled in the pump chamber 9 beforehand.

When the solenoid valve 18 is energized, the coil 42 of the solenoid valve 18 is excited, and since the plunger 39 is displaced upward, the force applied to the valve 36 is weakened, and the compressed air is supplied to the valve 36. ) Is pushed up to flow into the pneumatic chamber 5b while pushing down the exhaust valve seat 35.

As the compressed air flows in, the pressure in the pneumatic chamber 5b increases and is pressed against the left side against the plunger 8 return spring.

As the plunger 8 moves, the grease filled in the cylinder 6 is pressurized and discharged from the discharge port 21. Then, the grease discharged from the discharge port 21 is supplied to each lubrication part via a distributor not illustrated.

When supply of this grease is complete | finished, the electricity supply to the solenoid valve 18 will stop, the force which continues to absorb the plunger 39 of the solenoid valve 18 will cease, and the valve 36 will turn to the spring 41 As a result, the valve seat 34 is seated on the supply side, and the pressurization of the compressed air is stopped, and the exhaust valve seat 35 is opened to discharge the compressed air in the pneumatic chamber 5b to the atmosphere. Accordingly, the plunger 8 is pressed to the right by the action of the return spring 14, so that the plunger 9 returns to its original position.

The inlet port 20 and the outlet port 21 are connected to the pump chamber 9 formed of the above-mentioned cylinder 6 and the plunger 8, and a check valve 22 is disposed in the inlet port 20, and the bar grease container described below. In communication with (26). On the other hand, the outlet 21 is connected to the grease supply end via the distributor which is not illustrated.

The upper part of the grease feeder main body 1 is equipped with a grease storage part 23, which is fitted to the support body 24 and the support body 24 which is fixed with a screw which is not illustrated in the main body 1. It is formed of the grease container 26 accommodated in the protective case 25. The center part of the support body 24 is provided with the screw part 27 which protruded upwards, and the supply port 28 which communicates with this screw part 27 side and the suction port 20 of the main body 1. Then, the grease container 26 is fixed by screwing the opening portion 29 of the grease container 26 downward to the screw portion 27, and the tip of the supply port 28 is covered by the cover of the grease container 26. (30) It breaks down so that the grease container 26 and the pump chamber 9 of the main body 1 may communicate.

In the above-described configuration, the grease supply device operates as follows.

Here, it is assumed that the pump chamber 9 is filled with grease in advance, and the plunger is returned to the state shown in FIG.

Now, when grease is supplied to each lubrication point, for example, the solenoid valve 8 is energized every predetermined driving distance of the vehicle, and the plunger 39 is displaced upward, so that the force exerted on the valve 36 is weakened. 36 is pushed up to flow into the pneumatic chamber 5b while pushing down the exhaust valve seat 36.

As the compressed air flows in, the pressure in the pneumatic chamber 5b increases, and the plunger 8 is pressed against the return spring 14 to the left.

By the movement of this plunger 8, grease filled in the cylinder 6 is pressurized and discharged from the discharge port. At this time, the backflow to the grease container 26 is prevented by the check valve 22.

Then, the grease discharged from the outlet 21 is supplied to each lubrication part via a distributor which is not illustrated.

When supply of this grease is complete | finished, energization to the solenoid valve 18 is stopped, the valve 36 is seated in the supply side valve seat 34, stops the pressurization of compressed air, and simultaneously releases the exhaust side valve seat 35. FIG. It opens and discharges the compressed air in the pneumatic chamber 5b to an atmospheric side. Accordingly, the plunger 8 is pressurized to the right by the action of the return spring 14, and the plunger 8 returns to its original position, at which time it is discharged by the discharge valve (not illustrated) provided at the front end of the discharge port 21. At the same time as the reverse flow of the grease is prevented, the grease is absorbed into the cylinder 6 via the check valve 22 in the grease container 26, and the preparation for the next supply is made.

The diaphragm 12 is bent according to the left and right movement of the plunger 8, but when the grease feeder does not operate, the diaphragm 12 is in a position as shown in FIG. 1, and the bent portion is the side portion 15b. It is close to the opening end 16 of the upper part, and is thicker than the other part, and it is not only sharpened by bending and bending, but also a plurality of acute bend points (so-called wrinkles) occur over the entire circumference. However, the number is not so many that it is possible to prevent the friction cut during reciprocating movement.

Claims (8)

In the grease supply apparatus 1 which the plunger 8 reciprocates in the cylinder 6, lifts grease in the grease container 26, and supplies the lifted grease to each oil supply site, The plunger 8 A retainer 10 is provided at the end of the cylinder opposite to the cylinder, and the retainer 10 has a return spring 14 disposed between the main body and the grease supply device 1, and at the same time, the diaper retains the retainer 10. The diaphragm 12 was attached, and the opening end 16 of this diaphragm 12 was fixed to the grease feeder 1 main body. The diaphragm 12 constituted a pneumatic chamber 5b on the opposite side of the cylinder. And a pneumatic chamber (5b), wherein the supply of pneumatic pressure is controlled via a solenoid valve (18). The diaphragm 12 according to claim 1 is a wood-shaped body, and the opening end 16 is made thicker, and the portion of the wooden base 15 near the opening end 16 is lower than that of the other wooden base 15. Grease feeder, characterized in that thickened. The grease supply apparatus as set forth in claim 1, wherein the diaphragm (12) is tapered to the neck body (15) and the taper angle is increased in the vicinity of the open end (16) to form two-stage paper. The grease supply apparatus according to claim 1, wherein the opening end portion (16) of the diaphragm (12) is folded in the grease supply apparatus main body (1) by folding it from the neck main body (15). The grease supply apparatus according to claim 1, wherein the grease supply apparatus main body (1) in which the cylinder (6) is formed is formed with a resin, and a hard sleeve (6b) is provided on the sliding side thereof. 6. A grease supply apparatus according to claim 5, wherein the sleeve (6b) is made of metal. 2. The solenoid valve (18) according to claim 1, wherein the solenoid valve (18) is provided with a valve (36) which can move up and down, and a supply side valve seat (34), an exhaust side valve seat (35) and a valve (36) which are selectively seated according to this displacement. Resisting the spring 41 and the spring 41 acting to press the valve 36 to the supply side valve seat 34 via the plunger 39 abuts against the integrated rod 37 and the plunger 39. A grease supply device, comprising: a coil (42) for changing the plunger (39). 8. The spring (41) is fitted with its one end in an annular groove (46) formed at the valve side of the plunger (39) outwardly near the lower end, and the other end is fitted with the lower end side of the coil (42). Grease feeder, characterized in that the contact.