KR20090064253A - Light type hydraulic jack - Google Patents

Light type hydraulic jack Download PDF

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Publication number
KR20090064253A
KR20090064253A KR1020070132912A KR20070132912A KR20090064253A KR 20090064253 A KR20090064253 A KR 20090064253A KR 1020070132912 A KR1020070132912 A KR 1020070132912A KR 20070132912 A KR20070132912 A KR 20070132912A KR 20090064253 A KR20090064253 A KR 20090064253A
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KR
South Korea
Prior art keywords
pressure oil
piston
high pressure
screw hole
assembled
Prior art date
Application number
KR1020070132912A
Other languages
Korean (ko)
Inventor
이재유
Original Assignee
이재유
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 이재유 filed Critical 이재유
Priority to KR1020070132912A priority Critical patent/KR20090064253A/en
Publication of KR20090064253A publication Critical patent/KR20090064253A/en

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C37/00—Other methods or devices for dislodging with or without loading
    • E21C37/06—Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
    • E21C37/08—Devices with pistons, plungers, or the like, pressed locally against the wall of the borehole
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1404—Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)

Abstract

A light weight hydraulic jack for the rock breaking is provided to reduce the manufacture unit cost by minimizing the failure rate. A light weight hydraulic jack for the rock breaking comprises: a steel body including a front panel(50), a curved shape back panel(40), a first high-pressure oil path, a second high-pressure oil path, a first low-pressure oil path, a second low-pressure oil path and screw-holes(16,26); a piston with a space part for the light weight, assembled inside an upper and lower part cylinder(10,20); a piston supporting unit supporting the piston with being assembled in screws(15,25) of the upper and lower part cylinder; a top plate(120) fixed on the body by welding; lateral plates(100,110) inserted in shifts(51,41) located both side of the body front and back panel by welding; and a bottom plate(130) fixed on the bottom of the body by welding.

Description

Light type hydraulic jack for rock crushing

1 is a reference perspective view (frontal reference) showing a completed state of the present invention.

Figure 2 is an exploded perspective view showing the internal structure of the present invention.

Figure 3 is a plan view showing a skeleton structure of the present invention.

Figure 4 is a cross-sectional view taken along the line A-A of Figure 3 showing the high pressure oil passage of the present invention.

Figure 5 is a cross-sectional view taken along the line B-B of Figure 3 showing the low pressure oil passage of the present invention.

6 is a cross-sectional view taken along line C-C of FIG. 3 showing a completed state of the present invention (before piston protruding).

Figure 9 is a cross-sectional view taken along the line C-C of Figure 3 (after piston protrusion) showing a completed state of the present invention.

The present invention relates to a lightweight hydraulic jack for rock crushing.

In civil engineering, starting from 2008, breaking rocks using breakers and blasting using explosives is prohibited in 2008, based on noise and vibration regulations. . As a result, there was an urgent need for a method of quietly crushing rocks within the scope of regulation even when working in residential areas. As a result of many studies, a special drilling device operated by the power of a fork lane was created. This is a device capable of drilling a diameter of about 200mm in the rock, the hydraulic jack is inserted into the hole formed by the equipment to operate the rock is broken.

By the way, the conventional rock crushing hydraulic jack structure has a weight of 35Kg or more based on two sets of pistons (diameter: 90mm, length: 150mm), and when the piston is assembled, the weight is 40Kg or more. There are many cases where it takes a lot of power to move around and safety accidents occur in this process. In other words, a typical civil construction site has a lot of uneven floors and a poor environment, and the worker is usually composed of elderly people. In and out, or the hydraulic jack is inserted into the hole while using both legs to support the work must be repeated while holding up, the worker easily feels fatigue and further reduced the concentration and work motivation. Therefore, safety accidents such as spraining ankle, injury to the wrist, injury to the spine or stretching of ligaments are frequently occurring along with the uneconomical disadvantage of not only poor working efficiency but also longer working hours. There is an urgent need of the related industry and government level to solve this problem because it is inevitable to cause serious problems such as musculoskeletal disorders.

In other words, the conventional hydraulic jack described above provides a cause that causes such a serious problem, since the main reason is that it is manufactured through conventional and unscientific techniques. That is, the conventional hydraulic jack housing is made of a single body of the entire body except the handle 140 in accordance with the drawings of the present invention, the weight of its own based on two sets of piston type can not but exceed 35kg I have a problem. In addition, the conventional hydraulic jack housing is very difficult to form a high pressure oil passage and a low pressure oil passage together with a hole into which the piston is inserted into the tub, so that the occurrence rate of defects is high, the manufacturing cost is high, and the maintenance is very difficult. Abandonment is also a big problem that needs to be improved. On the other hand, as the number of pistons increases, the weight of the hydraulic jack increases more. Therefore, there is no choice but to use a hydraulic jack with two or less pistons.

It is therefore an object of the present invention to provide a housing structure of a lightweight hydraulic jack of a new concept that can solve the problems and closed ends resulting from the above-described conventional rock breaking hydraulic jack housing structure.

The present invention for solving the above problems is configured as follows.

In the front is provided with a front plate 50 having a stage 51 for fixing the side plate 100, 110 on both sides by welding, the rear side plate 100 on both sides in the same way as the front plate 50 ) 110 is provided with a curved back plate 40 is formed with a stage 41 for fixing by welding, the high pressure oil hose connecting screw hole 11 is formed on the upper cylinder 10 and the high pressure oil The first high pressure oil passage 12 for supplying the high pressure oil for piston forward into the hole 14 through which the upper piston 90 is assembled while passing through the screw hole 11 for connecting the hose and the piston in the lower cylinder 20 A second high pressure oil passage 13 for supplying the high pressure oil in association with the hole 24 into which the 90a is assembled is formed, and the low pressure oil hose is connected at a position opposite to the screw hole 11 for connecting the high pressure oil hose. A screw hole 21 is formed and the screw hole 21 for connecting the low pressure oil hose The first low pressure oil passage 22 for supplying the low pressure oil for piston retraction into the hole 14 through which the upper piston 90 is assembled, and into the hole 24 where the piston 90a is assembled to the lower cylinder 20. A second low pressure oil passage 23 for supplying the low pressure oil is provided, and the piston clamp 80 is assembled in front of the piston assembly holes 14 and 24 of the upper and lower cylinders 10 and 20. Screws (15) and (25) are formed and screw holes (11) for fastening the handle (140) to the rear of the screw hole (11) for connecting the high pressure oil hose and the screw hole (21) for connecting the low pressure oil hose ( 16) (26) formed cast steel body (A);

A piston (90) (90a) which is assembled inside the upper and lower cylinders (10) and (20) and has a space (91) (91a) for light weight;

A piston clamp 80 for stably supporting the pistons 90 and 90a while being assembled to the screws 15 and 25 of the upper and lower cylinders 10 and 20;

Holes 121 and 122 having the same diameter as the high pressure oil hose connection screw hole and the low pressure oil hose connection screw hole 21 are formed, and a screw hole in which a bolt for fixing the handle 140 is assembled. An upper plate (120) fixed by welding on the body (A) with a hole (123) having the same diameter as the (16) (26);

Side plates 100 and 110 fixed by welding while being fitted to ends 51 and 41 formed on both sides of the front plate 50 and the rear plate 40 of the body A and welded under the body A. Characterized in that consisting of the bottom plate 130 is fixed to.

Next, look at the features and functions of the present invention.

The structure of the present invention as described above can be seen at a glance through the drawings, the main feature is one body (A) and the upper plate 120 and the lower plate 130, both side plates 100 are made of cast steel products Due to the prefabricated structure 110 and the spaces 91 and 91a formed inside the pistons 90 and 90a, a large amount of space is formed inside the hydraulic jack, thereby reducing the weight. In addition, the body (A) of the present invention is made of a cast steel can easily form the passage of each oil is so simple that it can not be compared with the manufacturing process of the conventional hydraulic jack housing is given a feature that almost no defect rate occurs. .

In the present invention, the curved back plate 40 is inserted into a hole having a diameter of 200 mm formed in the rock by the drilling device as described above, and the rounding is formed in the horizontal direction to make stable contact when the force is applied during the crushing operation. About 100 mm is preferable. In addition, the front plate 50 of the present invention has a flat shape because there is no contact with the drilled hole.

Meanwhile, referring to FIG. 1, two sets of pistons 90 and 90a of the upper and lower parts are assembled to the hydraulic jack of the present invention while being fixed by the piston clamp 80, and the high pressure oil hose is connected to the front of the upper plate 120. A screw hole 11 for connecting a low pressure oil hose and a screw hole 21 for connecting a low pressure oil hose are formed to connect a high pressure oil hose and a low pressure oil hose extended from a hydraulic booster (not shown) that amplifies the hydraulic power of the fork lane. It can be seen that the handle 140 is fixed by the bolt. See FIG. 6 and FIG. 7 to examine this in detail.

Fig. 6 shows a state in which the piston 90, 90a does not escape from the body A, that is, is not pressurized. In order to further reduce the weight, the interior of the piston 90, 90a has a space 91 (91a). Subsequently, each piston clamp 80 is firmly assembled by screws 15 and 25 of the upper and lower cylinders 10 and 20. Next, in order to crush the rock by advancing the pistons 90 and 90a, the high pressure oil of about 1,800 to 2,000 Kg / cm 2 is supplied to the first high pressure through the high pressure oil supply hose connected to the screw hole 11 for connecting the high pressure oil hose. As the high pressure oil is injected into the upper cylinder 10 through the oil passage 12, the high pressure oil is also injected into the lower cylinder 20 through the second high pressure oil passage 13.

Therefore, the piston 90, 90a is advanced as shown in FIG. At this time, the oil in the space (a) between the piston (90) (90a) and the upper and lower cylinders (10, 20) is transferred to the oil tank through the second low pressure oil passage (23) and the first low pressure oil passage (22). Returning is obvious. Next, when the piston 90, 90a is to be returned after the rock crushing operation, 200Kg / ㎠ through the low pressure oil supply hose which cuts off the supply of high pressure oil and is connected to the low pressure oil hose connecting screw hole 21 When the low pressure oil is supplied, the low pressure oil is filled into the space part a through the second low pressure oil passage 23 and the first low pressure oil passage 22. Therefore, the piston 90 can be in the original position as shown in FIG.

In the experimental example of the present invention, the inner diameter of the upper and lower cylinders 10, 20 is 90mm, the length is 150mm, the thickness is 13mm, and then assembling the piston as shown in Figure 6 oil injection of about 1,800 ~ 2,000Kg / ㎠ And the oil discharge experiment was carried out over 300 hours, the operation without any problem and the upper and lower cylinders were not broken or deformed or cracked, the upper plate 120 and the lower plate 130 and both sides (100) When the housing was completed with the thickness of 110) as 4 mm, a good result was obtained that the total weight reached 24 kg.

On the other hand, the inner diameter of the upper and lower cylinders (10, 20) is 90mm, length is 150mm, thickness is 11mm, and then assembling the piston as shown in Figure 6 to the oil injection and oil discharge experiment of about 1,800 ~ 2,000Kg / ㎠ 300 As it was conducted over time, the operation of the upper and lower cylinders also did not cause any breakage or deformation or cracks, and the upper and lower cylinders of the upper plate 120 and the lower plate 130 and the side plates 100 and 110 did not have any problems. The housing was completed with a thickness of 3 mm, and a good result was obtained with a total weight of 21 Kg. However, if the safety factor is sufficiently considered in the design, the former is slightly heavier than the latter, but may be more desirable as a real product.

And in the present invention, a technique for manufacturing the body (A) as a cast steel is well known and will not be described in detail. The upper and lower plates and side plates described above can be fixed through the welding of the body (A) and argon, which are cast steel products. Therefore, it can also be assembled using a screw, which is obviously within the scope of the present invention.

The present invention as described above, as the finishing work after covering the remaining portion except the body (A), which receives the most force during rock crushing work with the iron plate to be formed in the housing as well as the space is formed in the piston By reducing the weight, it is possible to solve the conventional problems and closed ends, and by manufacturing the body (A) as a cast steel product, the manufacturing method of the entire hydraulic jack is simple and the generation of defect rate can be minimized. It can have a useful effect.

Claims (1)

In the front is provided with a front plate 50 having a stage 51 for fixing the side plate 100, 110 on both sides by welding, the rear side plate 100 on both sides in the same way as the front plate 50 110 is provided with a curved back plate 40 formed with a stage 41 for fixing by welding, and a high pressure oil hose connection screw hole 11 is formed above the upper cylinder 10 and the high pressure oil is formed. The first high pressure oil passage 12 for supplying the high pressure oil for piston forward into the hole 14 through which the upper piston 90 is assembled while passing through the screw hole 11 for connecting the hose and the piston in the lower cylinder 20 A second high pressure oil passage 13 for supplying the high pressure oil in association with the hole 24 into which the 90a is assembled is formed, and the low pressure oil hose is connected at a position opposite to the screw hole 11 for connecting the high pressure oil hose. A screw hole 21 is formed and the screw hole 21 for connecting the low pressure oil hose is connected to the pipe. The first low pressure oil passage 22 for supplying the low pressure oil for piston retraction into the hole 14 through which the upper piston 90 is assembled, and into the hole 24 where the piston 90a is assembled to the lower cylinder 20. A second low pressure oil passage 23 for supplying the low pressure oil is provided, and the piston clamp 80 is assembled in front of the piston assembly holes 14 and 24 of the upper and lower cylinders 10 and 20. Screws (15) and (25) are formed and screw holes (11) for fastening the handle (140) to the rear of the screw hole (11) for connecting the high pressure oil hose and the screw hole (21) for connecting the low pressure oil hose ( 16) (26) formed cast steel body (A); A piston (90) (90a) which is assembled inside the upper and lower cylinders (10) and (20) and has a space (91) (91a) in order to reduce weight; A piston clamp 80 for stably supporting the pistons 90 and 90a while being assembled to the screws 15 and 25 of the upper and lower cylinders 10 and 20; Holes 121 and 122 having the same diameter as the high pressure oil hose connection screw hole and the low pressure oil hose connection screw hole 21 are formed, and a screw hole in which a bolt for fixing the handle 140 is assembled. An upper plate (120) fixed by welding on the body (A) with a hole (123) having the same diameter as the (16) (26); Side plates 100 and 110 fixed by welding while being fitted to ends 51 and 41 formed on both sides of the front plate 50 and the rear plate 40 of the body A and welded under the body A. Lightweight hydraulic jack for rock crushing, characterized in that consisting of a bottom plate 130 is fixed to.
KR1020070132912A 2007-12-14 2007-12-14 Light type hydraulic jack KR20090064253A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070132912A KR20090064253A (en) 2007-12-14 2007-12-14 Light type hydraulic jack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070132912A KR20090064253A (en) 2007-12-14 2007-12-14 Light type hydraulic jack

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KR20090064253A true KR20090064253A (en) 2009-06-18

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Application Number Title Priority Date Filing Date
KR1020070132912A KR20090064253A (en) 2007-12-14 2007-12-14 Light type hydraulic jack

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111215852A (en) * 2020-01-22 2020-06-02 武汉船用机械有限责任公司 Machining method for cylinder body of double-piston oil cylinder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111215852A (en) * 2020-01-22 2020-06-02 武汉船用机械有限责任公司 Machining method for cylinder body of double-piston oil cylinder
CN111215852B (en) * 2020-01-22 2021-08-17 武汉船用机械有限责任公司 Machining method for cylinder body of double-piston oil cylinder

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