KR200205381Y1 - A hydraulic cylinder with manual hydraulic pump - Google Patents

Abstract

The present invention integrates a manual hydraulic pump and a hydraulic double acting cylinder to eliminate oil leakage during operation, simplifying the construction, making it easy to manufacture, and convenient to use, and also to reduce manufacturing costs.

In order to achieve the above object, the present invention constitutes an inner cylinder 6 in which a piston rod 16 and a piston 10 are fitted in a cylinder body 4, and an outer cylinder 8 in which a piston 22 is elastically installed. A valve chamber 26 is formed at one lower end of the cylinder body 4, and a valve chamber in which an operating chamber 30 and a check valve 32 and 34 in which the spool 28 is fitted is formed in the valve body 26. 36, the spool 28 is raised and lowered by the eccentric cam 56, and the pump piston 60 is installed in the valve chamber 36.

Description

Hydraulic cylinder with manual hydraulic pump

The present invention is to make the manual hydraulic pump and the hydraulic double acting cylinder work in unison, eliminating oil leakage during operation and simplifying the construction to make the production quick and easy to use and reduce the production cost. .

In general, the manual pump device that is used in industrial sites or daily life is used in a number of configurations.

However, manual pump devices which are generally used have the following problems.

In other words, the manual hydraulic pump device is cumbersome and leaky because it uses a separate hydraulic hose piping and hydraulic cylinder, and the hydraulic jack (JACK) is composed of a manual pump and a hydraulic cylinder, but a single hydraulic cylinder It was cumbersome to use.

In addition, the conventional manual pump has a problem in that, even when the hydraulic cylinder is not loaded, the pumping operation must not only move the cylinder piston forward, but also have to return the external load, the return spring in the cylinder, or manually return the cylinder when it is retracted. .

In order to correct these problems, the present invention allows the cylinder piston to rise by a simple operation of the lever when there is no load, and when the lever is operated even when the cylinder descends due to an external load, when the external load is removed. In this case, the pumping lever is operated so that the cylinder piston can be lowered.

In order to achieve the above object, the present invention has a lower cylinder chamber and an upper cylinder chamber configured by the piston so that the piston can be lifted and installed in the cylinder, but the upper cylinder chamber is configured to form a connection hole in communication with the oil passage. Another outer cylinder is configured so that the outer cylinder chamber is configured, and the piston is installed on the outer cylinder chamber, and then the elastic cylinder is supported by a relatively strong spring, and a lower side of the outer cylinder has an operating chamber in which the spool is elastically installed. The valve chamber is configured to be in communication with the lower cylinder chamber and the outer cylinder chamber, and a valve chamber having inlet and outlet opening and closing valves is formed at one side of the operating chamber so that the valve chamber is in communication with the operating chamber and the oil passage. It is made up.

1 is a cross-sectional view of the present invention hydraulic cylinder.

2 is a cross-sectional configuration diagram of a hydraulic cylinder of the present invention, in which a piston is raised.

3 is a cross-sectional view of the hydraulic cylinder of the present invention, in which the piston descends

4 is a cross-sectional view of the main part of the present invention.

* Explanation of symbols for main parts of the drawings

2: hydraulic cylinder 4: cylinder body

6: inner cylinder 8: outer cylinder

9: outer cylinder chamber 10,22: piston

12: lower cylinder chamber 14: upper cylinder chamber

16: piston rod 18: connecting hole

20: oil hole 24,33,35: spring

26: valve body 28: spool

30: operation chamber 32, 34: check valve

36: valve chamber 38, 40: passage

42,44 passage 46 lower body

48: upper body 50: upper passage

52: lower passage 56: eccentric cam

58: operating lever 60: pump piston

62: pump lever

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

FIG. 1 is a cross-sectional view of the hydraulic cylinder 2 of the present invention, wherein the inner cylinder 6 and the outer cylinder 8 are configured on the cylinder body 4, and the piston 10 is fitted with the piston 10 on the inner cylinder 6. The lower cylinder chamber 12 and the upper cylinder chamber 14 are configured by 10, and the piston rod 16 integrally formed with the piston 10 passes through the cylinder body 4 to protrude outward. In addition, the upper cylinder chamber 14 formed in a relatively narrow space by the piston rod 16 is connected to the oil passage 20 formed in the cylinder body 4 through the connection hole 18 and the outer cylinder chamber 9 The piston 22 is also mounted on the top of the piston 22, but the piston 22 is rigidly installed by a spring 24 having a strong elasticity.

On the lower side of the cylinder body 4, the valve body 26 is protruded as shown in FIG. 4, but in the valve body 26, the operation chamber 30 and the check valve 32 and 34 (34) fitted with the spool 28 are fitted. ) Is formed valve chamber 36, the operating chamber 30 is in communication with the lower cylinder chamber 12 and the outer cylinder chamber 9 through the passage 38 (40), respectively, and oil It is in communication with the passage (20).

In addition, the check valves 32 and 34 configured in the valve chamber 36 are connected to the operation chamber 30 and the oil passage 20 through the through holes 42 and 44, respectively, and are fitted in the operation chamber 30. The spool 28 is composed of a lower body 46 and the upper body 48 to open and close the upper passage 50 and the lower passage 52 configured in the operation chamber 30, and the spring below the spool 28 (54) is installed so that the spool 28 is supported upward, and the upper end of the spool 28 penetrating the operating chamber 30 is in contact with the eccentric cam 56, and the eccentric cam 56 has an operating lever ( 58) is configured.

At the upper end of the valve body 26, the pump piston 60 is inserted into and out of the valve chamber 36, and the pump piston 60 is connected to the pump lever 62 to move the pump lever 62 up and down. The piston 10 moves up and down while the piston 60 moves in and out of the valve chamber 36.

Reference numeral 70 is a packing.

The present invention configured as described above operates the eccentric cam 56 holding the upper end of the spool 28 and then operates the pump lever 62 to raise and lower the piston 10 fitted to the inner cylinder 6.

In order to raise the piston rod 16, it is enough to operate the hydraulic cylinder 2 as follows.

That is, as shown in FIG. 2, when the operating lever 58 is pulled forward and rotated, the eccentric cam 56 connected to the operating lever 58 deeply touches the upper body 48 of the spool 28, and thus, the singer body 45 The upper passage 50 of the operation chamber 30 is sealed by the outer cylinder chamber 9 and the operating chamber 30 through the passage 40 to communicate with each other.

Therefore, the piston 22 fitted into the outer cylinder chamber 9 is lowered down by the strong repulsive force of the spring 24, and the oil filled in the outer cylinder chamber 9 passes through the passage 40 to the operating chamber ( 30 is introduced into the operation chamber 30 and the oil flows into the valve chamber 37 while pushing the check valve 32 and then flows into the oil passage 20 while pushing another check valve 34 again. .

At this time, the oil filled in the inner cylinder chamber 9 flows into the oil passage 20 without operating the pump lever 62, so that the repulsive force of the spring 24 holding the piston 22 is reduced. This is because it is stronger than the force of the springs 33 and 35 holding the (34).

As described above, some of the oil introduced into the oil passage 20 flows into the lower cylinder chamber 12 of the inner cylinder 6 through the operation chamber, and the other portion of the oil passage 20 formed in the cylinder body 4. And it is introduced into the upper cylinder chamber 14 through the connection hole 18.

However, since the cross-sectional area of the oil flowing into the lower cylinder chamber 17 and holding the piston 10 bottom surface is much larger, the piston 10 is raised.

Therefore, if the piston rod 10 is raised to a position where the load is not applied by the simple operation of the operating lever 58, and an external load (load greater than the holding force of the spool 24) is applied to the piston rod 16, the oil As soon as the movement of the gas is stopped, the rise of the piston rod 16 is also stopped, and thus the check valves 32 and 34 are also closed.

When the pump lever 62 is operated in the above state, both check valves 32 and 34 repeat the opening and closing operation, and the oil filled in the outer cylinder chamber 9 moves the operating chamber 30 and the valve chamber 36. The oil flowing into the oil passage 20 and the oil flowing into the oil passage 20 continues to flow into the lower cylinder chamber 12 to raise the loaded piston rod 16, and the piston rod 16 needs a height. When the pumping operation is stopped by rising as much as the oil tries to flow back by the load of the piston rod 16, but the oil passage 20 is blocked by the check valve 34, so that it does not fall and the necessary work in this state.

When the piston rod 16 is to be lowered, as shown in FIG. 3, when the operating lever 58 is rotated rearward to raise the spool 30 which is in contact with the cam 56, the piston rod 16 is lowered. Done.

That is, as shown in FIG. 3, when the spool 28 is raised, the lower body 46 of the spool 28 seals the lower passage 52 of the operating chamber 30, and at the same time, the operating chamber 30 and the lower cylinder. The seal 12 and the outer cylinder chamber 9 communicate with each other through the passages 38 and 40, and in the above state, the piston rod 16 is lowered because it is under load.

As the piston 10 is lowered by the external load, the oil filled in the lower cylinder chamber 12 flows into the operation chamber 30 through the passage 38, and some of the oil introduced into the operation chamber 30 passes through a check valve ( 32) (34) while opening the upper cylinder chamber 14 as much as the piston 10 descends through the oil passage 20 and the remaining portion is introduced into the outer cylinder chamber (9) through the passage (40) The piston 10 is lowered.

This operation proceeds until the internal load is completely removed from the piston rod 16. When the external load acting on the piston rod 16 is completely removed, the lowering of the piston rod 16 stops and at the same time the check valve 32 34 also blocks the through holes 42 and 44.

When the pump lever 62 is operated in the above state, the oil is introduced into the oil passage 20 by the opening and closing operation of the check valves 32 and 34, and then flows into the upper cylinder chamber 14 to lower the piston 10. When this is completed, the operation of the pump lever 62 may be stopped.

Therefore, the present invention integrates a manual hydraulic pump and a hydraulic double acting cylinder chamber so that there is no leakage of oil during operation and the configuration is simple, so that the production is quick and easy to use, and it is easy to use and also saves manufacturing cost. The operation of the pump and the operating lever freely raises and lowers the piston rod.

Claims (1)

The inner cylinder 6 and the inner cylinder 8 are configured in the cylinder body 4, and the lower cylinder chamber 12 and the upper cylinder chamber are inserted with the piston 10 having the piston rod 16 formed therein. The upper cylinder chamber 14 is in communication with the oil passage 20 through the connection hole 18, and the piston 22 in the outer cylinder chamber 9 formed in the outer cylinder 8 ) And then press the spring 24 to form a valve body 26 at the lower end of the cylinder body 4, and check the operation chamber 30 in which the spool 28 is inserted into the valve body 26. A valve chamber 36 in which valves 32 and 34 are formed is formed, and the spool 28 fitted in the operation chamber 30 is lifted by the eccentric cam 56, and the operation chamber 30 is a passage ( 38) (40) through the lower cylinder chamber 12 and the outer cylinder chamber (9), respectively, and the hydraulic piston pump characterized in that the pump piston (60) is installed on the valve chamber (36) Consisting of hydraulic cylinders.