KR200176738Y1 - Oil pulse impact wrench - Google Patents

Abstract

The present invention relates to a hydraulic pulse impact wrench, and to provide a pulse structure of the hydraulic pulse impact wrench that can reduce vibration and noise as much as possible. The hydraulic pulse unit is an armville attached to the driving blade for generating a predetermined pressure on the upper and lower rotation to receive the rotational force of the motor; A liner coupled to the armville and filled with hydraulic pressure therebetween and formed in an elliptical shape with protrusions having different widths on an inner circumferential surface thereof; A hydraulic plug coupled to the first hole of the front plate which is installed in contact with one side of the liner and for injecting hydraulic pressure from the outside; It is coupled to the second hole of the front plate, it consists of a relief valve for adjusting the hydraulic pressure between the liner and the ambil.

Description

Hydraulic Pulse Impact Wrench {OIL PULSE IMPACT WRENCH}

The present invention relates to various wrenches, and more particularly to a hydraulic pulse impact wrench that can reduce vibration and noise as much as possible.

Typically, when the bolt or screw is tightened by using a spanner, an impact wrench (Impact Wrench) is a mechanical implementation of this principle. The impact wrench is composed of an ambil, a hammer and a hammer cam, and converts the rotational force of the motor driven by the compressed air into a striking force and repeats the impact force to tighten the bolt or screw. That is, the hammer is accelerated by the rotational force of the motor to rotate around the ambil. Then, the accelerated hammer hits the protruding end of the ambil, and the ambil is rotated to fasten the bolt or screw.

However, the impact wrench having the above-described configuration rotates at high speed under no load by using a general air motor of one eccentric type, but increases torque deterioration under load and increases torque after completion of tightening. To generate an over torque.

And the impact of the impact of the hammer and the ambil of the impact wrench caused noise (more than 100db) and vibration aggravated the fatigue of the worker, and in particular caused the hearing loss and strapping caused by noise, vibration. In addition, due to the impact of the metal, wear and tear of parts, such as large consumption is not only frequent repair is required, the life of the wrench is shortened, durability has been a problem that is reduced.

Accordingly, an object of the present invention is to provide a hydraulic pulse impact wrench that can reduce vibration and noise as much as possible.

Another object of the present invention is to provide a hydraulic pulse impact wrench that does not generate any torque reaction force.

In order to achieve the above object, the hydraulic pulse unit of the present invention is rotated by receiving the rotational force of the motor and the driving blade is attached to generate a predetermined pressure on the upper and lower surfaces; A liner coupled to the armville and filled with hydraulic pressure therebetween and formed in an elliptical shape with protrusions having different widths on an inner circumferential surface thereof; A hydraulic plug coupled to the first hole of the front plate which is installed in contact with one side of the liner and for injecting hydraulic pressure from the outside; It is coupled to the second hole of the front plate, characterized in that consisting of a relief valve for adjusting the hydraulic pressure between the liner and the ambil.

1 is a perspective view showing the configuration of a hydraulic pulse impact wrench according to an embodiment of the present invention.

2 is a cross-sectional view of FIG.

Figure 3 is an exploded perspective view showing the configuration of the hydraulic pulse portion in the hydraulic pulse of the present invention.

Figure 4 is a cross-sectional view showing a coupling state of the hydraulic pulse portion of the present invention.

Figure 5 is a schematic diagram showing the operation of the hydraulic pulse portion in the hydraulic pulse wrench of the present invention

Explanation of symbols for the main parts of the drawings.

10: Amvil 14: liner case

16: relief valve 18: hydraulic plug

22: motor 34: rear plate

36: liner set 40: front plate

44: liner 48: driving blade

50: spring

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used for the same components, even if displayed on different drawings. In the following description, only parts necessary for understanding the operation according to the present invention are described, and it should be noted that the description of other parts will be omitted so as not to obscure the subject matter of the present invention.

1 and 2 illustrate a configuration of a hydraulic pulse impact wrench formed in a gun type according to an embodiment of the present invention. In the drawing, the hydraulic pulse impact wrench is composed of an air supply unit, an air motor unit, and a hydraulic pulse unit, among which the air supply unit is composed of a normal air injection pipe 30 and a silencer 32, and the air motor unit has a predetermined driving force by the air pressure. It consists of a conventional motor 22 that generates

Here, the hydraulic pulse portion of the present invention is composed of a plurality of parts as shown in FIGS. 3 and 4. That is, the hydraulic pulse part has an Ambil 10 that is rotated by receiving a predetermined driving force from the motor 22 of the air motor unit, the grooves 10a having a long hole shape are formed on the upper / lower end of the Ambil 10. Driving grooves 48 are coupled to each of the grooves 10a by springs 50, and the driving blades 48 operate up and down by the spring force of the springs 50 to generate hydraulic pressure filled between the ambil 10 and the liner 44. The Amvil 10 is fitted with a liner 44 to be in contact with the driving blade 48, and the hydraulic pressure 100 is always filled between the Ambil 10 and the liner 44. Here, looking at the shape of the liner 44, as shown in Figure 5 has an empty space therein, the space is an oval shape. The first and second protrusions 46a and 46b are formed on the circumferential surface of the liner 44 at intervals of 90 degrees while being symmetric with each other, and they are formed with different widths. That is, the height of the first protrusion 46a is higher than the second protrusion 46b but is narrower. The second protrusion 46b is wider than the first protrusion 46a to generate hydraulic pressure together with the driving blade 48. .

In addition, a front plate 40 having first holes 40a and 40b formed on the left end of the liner 44 is fastened and fixed. In this case, an oil plug 18 is coupled to the first hole 44a of the front plate, and a relief valve 16 is coupled to the second hole 44b. Here, the relief valve 16 regulates the pressure of the hydraulic pressure 100 filled between the Ambil 10 and the liner 44, and the hydraulic plug 18 prevents the leakage of the hydraulic pressure 100 filled. A rear plug 34 is fastened and fixed to the right end of the liner 44 coupled to the Ambil 10, and a liner setter 36 is fastened and fixed to the rear end 34. The rear plate 34 is fixed to the liner setter 36. Wherein the front plate 40, liner 44, Ambil 10 and rear plate 34, liner setter 36 is coupled to the interior of the liner case 14. Finally, the hydraulic pulse portion configured as described above is installed in the hydraulic pulse impact wrench is cut off from the outside by the casing 12. That is, a hydraulic pulse impact wrench having a configuration as shown in FIG. 1 is achieved.

Hereinafter, referring to the operating state of the hydraulic pulse impact wrench configured as described above, first, as shown in FIG. 2, when pulling the gun 26 of the hydraulic pulse impact wrench, compressed air is supplied to the air motor unit through the air injection pipe 30. The motor 22 generates a predetermined driving force by the compressed air. The driving force of the motor 22 is then transmitted to the shaft 24, and then the rotational force of the shaft 24 is transmitted to the liner 44. Next, the liner 44 rotates in a clockwise direction, so that the pressure of the hydraulic pressure 100 filled in the liner 44 gradually increases, and at the same time, a strong pulse acts on the driving blade 48 to drive the Amvil 10. . At this time, the operation as described above is repeatedly operated at a speed of several dozen times for 1 second to generate a strong fastening force.

Here, the pulse process generated in the Ambil 10 and the liner 44, that is, the torque generating mechanism of the hydraulic pulse portion will be described in detail with reference to FIG.

First, the one-pulse process of the hydraulic pulse portion is composed of four steps before the pulse (270 °), when the pulse (0 °), after the pulse (90 °, 180 °).

That is, in the pre-pulse phase (270 °), the Ambil 10 is stopped by a load, and the liner 44 rotates clockwise by the rotational force of the motor 22. At this time, the inner space of the liner 44 is reduced in the volume of the left / right space by the driving blade 48, the hydraulic pressure 100 is filled in the liner 44 is free to flow past the depression of the liner 44. The liner 44 then continues to rotate clockwise to enter the pulse (0 °) step. That is, in the pulsed step, the liner 44 rotates so that the four contacts, that is, the two contacts of the driving blade 48 and the Amvil 10 are exactly in contact with the first protrusion 46a and the second protrusion 46b. As shown, the portion of the high pressure 100a and the low pressure 100b is instantaneously generated inside the liner 44. Then, a large force is applied to the side of the driving blade 48 by the pressure difference of the hydraulic pressure 100, and thus the Ambil 10 rotates clockwise several times.

Thereafter, the liner 44 rotates clockwise to reach a post pulse phase (90 °). In this case, the liner 44 rotates so that the contact points are staggered so that the hydraulic pressure 100 flows freely. The liner 44 is then accelerated by the rotational force of the motor 22 and returns to the state before the initial (pulse) after the pulse (180 °) step. At this time, after the pulse 180 °, the hydraulic pressure 100 is not blocked because the contacts of the first protrusion 46a, the second protrusion 46b and the Ambil 10 of the liner are opposite to the center line. As a result, the above operation process is repeatedly performed several dozen times for about 1 second, and accordingly, the hydraulic pulse unit generates a predetermined torque.

As described above, in the detailed description of the present invention has been described with respect to specific embodiments, it is possible to apply the configuration of the hydraulic pulse portion to the stretch type hydraulic pulse impact wrench within the scope without departing from the scope of the present invention. It should be appreciated that those skilled in the art will understand the facts.

As described above, the hydraulic pulse impact wrench of the present invention generates high torque at low speed, decreases torque generation under load, and increases torque after the completion of tightening to prevent fine assembly. And due to the sliding operation inside the unit (UNIT) of the hydraulic pulse impact wrench, noise (80db or less) and vibration hardly occurs, thereby realizing a comfortable working environment. In addition, the hydraulic pulse impact wrench of the present invention is about 5 times more durable than a conventional impact wrench, and also has the advantage of not losing parts such as wear and dullness.

Claims (2)

An hydraulic pulse impact wrench comprising a hydraulic pulse part, an air motor part, and an air supply part, the hydraulic pulse part rotating with receiving high-speed rotational force by air pressure and having an driving blade attached to generate a predetermined pressure on the upper and lower surfaces; A liner coupled to the anvil and filled with hydraulic pressure therebetween, the liner having an elliptical shape having protrusions of different widths on an inner circumferential surface thereof; A hydraulic plug coupled to the first hole of the front plate which is installed in contact with one side of the liner and for injecting hydraulic pressure from the outside; And a relief valve coupled to the second hole of the front plate and configured to adjust hydraulic pressure between the liner and the anvil. The liner of claim 1, wherein long grooves are formed on one side of the anvil, and the grooves are coupled to each other by a driving blade, and the liner is in contact with a surface of the driving blade. Is coupled, the hydraulic pulse impact wrench, characterized in that the front plate and the rear plate is fastened to each side end of the liner is coupled to the inside of the liner case.