KR102177469B1 - Hydraulic rotary actuator - Google Patents

Abstract

The present invention relates to a hydraulic rotary actuator which can structurally solve an oil leakage problem through a completely novel moving vane and packing structure different from the conventional ones and maintain the same performance as in initial installation for a long time even when abrasion of a packing occurs, so that durability can be significantly improved. The hydraulic rotary actuator includes: a cylinder in which a front housing and a back housing at the front and back of a body are coupled to face each other to be symmetric about the body at the center; a rotating shaft having a diameter expansion part stepped at the center so as to be positioned in the body of the cylinder; a fixed vane fixedly installed in the cylinder; and a moving vane rotating the rotating shaft while being moved from side to side around the fixed vane. The cylinder has rotating flow paths integrally formed in a ring shape in the body, the front housing, and the back housing so that the moving vane is moved from side to side. The rotating flow path of the body has a rectangular cross-sectional shape and each of the rotating flow paths of the front housing and the back housing has a semi-circular cross-sectional shape. Each of the moving vane and the fixed vane is characterized in that front and back ends thereof are formed to protrude in a semi-circular shape so as to match with the cross-sectional shape of the rotating flow path of the cylinder so that left and right side surfaces are each formed in the shape where semi-circles are connected to face each other on the front and back of a central rectangle.

Description

Hydraulic oscillating actuator{HYDRAULIC ROTARY ACTUATOR}

The present invention relates to a hydraulic oscillating actuator, and more particularly, to a hydraulic oscillating actuator in which a movable vane coupled with a rotating shaft rotates left and right according to the supply of hydraulic oil based on a fixed vane fixedly installed in a cylinder and rotates the rotating shaft. will be.

In general, a device that converts pressure energy of hydraulic oil supplied by a hydraulic pump into mechanical energy is collectively referred to as a hydraulic motor or a hydraulic actuator.

These hydraulic actuators are largely classified into three categories according to the motion method, a hydraulic cylinder for linear reciprocating motion, a hydraulic rotary motor for continuous rotary motion, and a hydraulic motion for oscillating motion at a certain angle. There is a hydraulic rotary actuator.

The hydraulic oscillating actuator is widely used in various industrial fields because it has a fast response due to a mechanical force and can exert a large force while miniaturizing a device. These hydraulic oscillating actuators are also largely classified into two types according to the flow of hydraulic pressure as a power source, and there are vane type hydraulic oscillating actuators and piston type hydraulic oscillating actuators. The piston type has the advantage of being more resistant to oil leakage than the vane type, but has a disadvantage in that the overall device is large and complicated. Conversely, the vane type has a compact advantage of a simple structure but is weak against leakage.

Among them, as shown in FIG. 1, the vane-type hydraulic oscillating actuator has a movable vane 40 coupled with the rotating shaft 30 in the cylinder 10 with respect to the fixed vane 20, as shown in FIG. As a structure to rotate the rotary shaft 30, it can be divided into a double vane type and a triple vane type, although not shown in the drawing together with the single vane type of Fig. 1 according to the number of the fixed vanes 20 and the movable vanes 30. , As the number of vanes increases, the rotation angle decreases.

The biggest problem of the vane-type hydraulic oscillating actuator as described above is oil leakage, and occurs at the front end and side surfaces of the movable vane 40. That is, as shown in FIGS. 2 to 6, when hydraulic oil is supplied from the right direction based on the fixed vane 20, the movable vane 40 rotates forward. At this time, the packing 50 is provided at the front end and the side of the movable vane 40, but if the packing 50 does not operate properly, hydraulic oil may leak in the opposite direction beyond the tip and side of the movable vane 40 Therefore, it has a very significant impact on performance.

In order to solve the oil leakage problem of such a hydraulic oscillating actuator, the'multi-stage seal for rotary actuators' in Registration Patent Publication No. 10-1300483 and the'Seal structure and oscillation type actuator including the same' in Registration Patent Publication No. 10-1367693 are presented. Has become. That is, there is an objective of catching leakage more reliably with a plurality of multi-stage seal structures, and a purpose of solving the leakage problem by reinforcing the tip and side of the rectangular 3-stage seal structure.

However, the hydraulic oscillating actuator according to the prior art as well as the conventional registered patent described above has a shape of the movable vane 40 having a rectangular shape in cross section as shown in Figs. 2 to 6, and accordingly, the inside of the cylinder 10 The shape of the rotating flow path is also bound to have a rectangular shape in cross section.

Therefore, first, even if the packing 50 installed on the movable vane 40 seals the front end and the side of the movable vane 40, the problem that the rotational passage cannot be completely sealed, and the second shape and cylinder of the movable vane 40 10) Since the shape of the inner rotating flow path itself has a square shape in cross section, there is a problem that oil leakage easily occurs through the corners.

In this respect, in the case of the hydraulic oscillating actuator according to the prior art, whether the structure of the packing 50 fixed to the front end and the side of the movable vane 40 is single or multistage, a leakage problem occurs due to the fundamental shape problem of the packing 50 It has no choice but to be overcome through frequent replacement, so it has no choice but to go with the problem of durability.

The object of the present invention conceived to solve the above problems is to structurally solve the oil leakage problem through a completely new movable vane and packing structure different from the prior art, and even if abrasion of the packing occurs, the same as at the time of initial installation. It is to provide a hydraulic oscillating type actuator that can significantly improve durability by maintaining performance for a long time.

In order to achieve the above object, the hydraulic oscillating actuator according to the present invention has a hollow inside, and a cylinder coupled so that the front front housing and the rear rear housing of the front are viewed symmetrically back and forth with respect to the central body, It is inserted into the cylinder along the front and rear longitudinal direction so as to be rotatably installed, and a rotation shaft having an enlarged diameter stepped in the center so as to be located inside the body of the cylinder, and a fixedly installed so as to protrude from the inner peripheral surface of the cylinder toward the inner diameter direction. A fixed vane and a movable vane that is coupled to the outer circumferential surface of the rotating shaft to protrude toward an outer diameter, and rotates the rotating shaft while swinging from side to side with respect to the fixed vane according to the supply of hydraulic oil into the cylinder, , The cylinder is integrally formed in an annular shape so that the movable vane swings left and right inside the body, the front housing and the rear housing, and the rotation flow path of the body is rectangular in cross section, and the front housing and the rear housing Each of the rotating flow paths of the housing has a semicircular shape in cross section, and each of the movable vanes and the fixed vanes is formed to protrude in a semicircular shape so that the front and rear ends are formed in a cross-sectional shape with the rotation flow path of the cylinder, so that the left and right sides face each other in a semicircular shape in the center rectangle. It is characterized in that the shape is connected to see.

In addition, further comprising a pair of first packing parts respectively coupled to the left and right side surfaces of the movable vane so as to contact the inner circumferential surface of the rotation channel, the first packing unit, in a ring shape, the outer circumferential surface in contact with the inner circumferential surface of the rotation channel The first packing member and the first packing inserting member which is in contact with the outer circumferential surface to be mated with the inner circumferential surface of the first packing member and inserted in the inner diameter direction of the first packing member, and the first packing inserting member on the left or right side of the movable vane. 1 It is characterized in that it comprises a first packing fixing member fixedly coupled with a bolt together with the packing inserting member and fixing the first packing member to the left or right side of the movable vane.

In addition, the first packing member, the first inflow fixing groove is formed in a ring shape on the surface facing the first packing fixing member, the first packing fixing member, the surface facing the first packing member A first insertion rib is formed to protrude in a ring shape along the periphery, and the first insertion rib is inserted into the first inlet fixing groove of the first packing member to fix the first packing member.

In addition, the first packing fixing member has a first inflow gap in the outer diameter direction between the first insertion rib and the first inflow fixing groove because the thickness of the first insertion rib is smaller than the thickness of the first inflow fixing groove And a first inner diameter direction inflow interval in the inner diameter direction, respectively.

In addition, the first packing member is characterized in that the hydraulic oil is introduced at the first inflow interval in the outer radial direction so that the outer peripheral surface is pressed in the outer radial direction to expand.

In addition, the first packing fixing member is formed through a plurality of first operating inflow holes along the circumference of the side to communicate with the first inflow gap in the inner diameter direction, and the hydraulic oil is passed through each of the first operating inflow holes. It is introduced at a directional inflow interval to pressurize the inner circumferential surface of the first packing member in the inner diameter direction to expand it.

In addition, further comprising a pair of second packing parts respectively coupled to the left and right side surfaces of the fixed vane so as to contact the inner circumferential surface of the rotation channel, the second packing unit, in a ring shape, the outer circumferential surface in contact with the inner circumferential surface of the rotation channel The second packing member and the second packing inserting member which is in contact with the outer circumferential surface to be mated with the inner circumferential surface of the second packing member and inserted in the inner diameter direction of the second packing member, and the second packing inserting member on the left or right side of the fixed vane. 2 It characterized in that it comprises a second packing fixing member fixedly coupled with a bolt together with the packing inserting member, and fixing the second packing member to the left or right side of the fixing vane.

In addition, the second packing member has a second inflow fixing groove recessed in a ring shape on a surface facing the second packing fixing member, and the second packing fixing member is a surface facing the second packing member A second insertion rib is formed to protrude in a ring shape along a periphery, and the second insertion rib is inserted into a second inlet fixing groove of the second packing member to fix the second packing member.

In addition, in the second packing fixing member, the thickness of the second insertion rib is smaller than the thickness of the second inflow fixing groove, and a second inflow gap in the outer diameter direction between the second insertion rib and the second inflow fixing groove And a second inner diameter inflow interval in the inner diameter direction, respectively.

In addition, the second packing member is characterized in that the hydraulic oil is introduced at an interval in the second outer diameter direction, and the outer peripheral surface is pressed in the outer diameter direction to expand.

In addition, the second packing fixing member is formed through a plurality of second operating inflow holes along the circumference of the side to communicate with the second inflow gap in the inner diameter direction, and hydraulic oil is passed through each of the second operating inflow holes. It is introduced at a directional inflow interval to pressurize the inner peripheral surface of the second packing member in the inner diameter direction to expand it.

The hydraulic oscillating actuator according to the present invention structurally solves the oil leakage problem through a completely new movable vane and a first packing part structure different from the conventional one, and even if abrasion of the first packing member occurs, the first packing fixing member As the hydraulic oil flows through the first outer radial inflow interval of the first packing member, the outer peripheral surface of the first packing member is pressed and expanded in the outer diameter direction, thereby maintaining the same performance as in the initial installation for a long time, thereby improving durability significantly.

In addition, when hydraulic oil flows through the first outer radial inflow interval of the first packing member and the outer peripheral surface of the first packing member is pressed in the outer radial direction and expands, the first inner radial inflow interval of the first packing member As the hydraulic oil flows in, the inner peripheral surface of the first packing member is pressed in the inner diameter direction to expand, thereby reliably preventing problems such as twisting of the first packing member or displacement.

In addition, by changing the structure of the movable vane and the first packing part, the shape of the rotating flow path inside the cylinder, the structure of the fixed vane and the second packing part, a further reinforced leakage problem is prevented, as well as the performance and durability of the second packing part. There is an effect that can also bring improvement.

1 is a cross-sectional view showing a single vane type hydraulic swing type actuator according to the prior art,
2 is a perspective view showing a hydraulic swing type actuator according to the prior art,
3 is a cross-sectional view as viewed from line A-A' of the embodiment of FIG. 2,
4 is a cross-sectional view as viewed from line B-B' of the embodiment of FIG. 3,
Figure 5 is an exploded perspective view of the embodiment of Figure 2,
6 is a perspective view of a main part showing an enlarged view of a rotating shaft, a movable vane, and a packing in the embodiment of FIG. 5,
7 is a perspective view showing an embodiment of a hydraulic swing type actuator according to the present invention,
8 is a cross-sectional view as viewed from line C-C' of the embodiment of FIG. 7;
9 is a cross-sectional view as viewed from line D'D' of the embodiment of FIG. 8;
10 is an exploded perspective view of the embodiment of FIG. 7,
FIG. 11 is a perspective view showing an enlarged main part of a rotating shaft, a movable vane, and a first packing part in the embodiment of FIG. 10;
12 is a perspective view of a main part showing an enlarged embodiment of a first packing part or a second packing part installed on a movable vane or a fixed vane among the embodiments of FIG. 10,
13 is a cross-sectional view illustrating a process in which the first packing unit operates by applying the embodiment of FIG. 12 based on the embodiment of FIG. 8,
14 is a cross-sectional view illustrating a process in which the second packing unit operates by applying the embodiment of FIG. 12 based on the embodiment of FIG. 8,
FIG. 15 is a perspective view showing an enlarged main part of another embodiment of a first packing part or a second packing part installed on a movable vane or a fixed vane among the embodiments of FIG. 10;
16 is a cross-sectional view showing a process of operating the first packing unit by applying the embodiment of FIG. 15 based on the embodiment of FIG. 8,
17 is a cross-sectional view illustrating a process of operating a second packing unit by applying the embodiment of FIG. 15 based on the embodiment of FIG. 8.

Hereinafter, a preferred embodiment of the hydraulic oscillating actuator according to the present invention will be described in detail with reference to the accompanying drawings.

The hydraulic oscillating actuator according to the present invention includes a cylinder 100, a rotating shaft 200, a fixed vane 300, and a movable vane 400, as shown in FIGS. 7 to 17, and the cylinder 100 ) Is composed of a body 110, a front housing 120 and a rear housing 130, and an annular rotation channel 140 is formed therein. In addition, a first packing part 500 and a second packing part 600 are further included, and the first packing part 500 includes a first packing member 510, a first packing inserting member 520, and a first packing part. A packing fixing member 530 is included, and the second packing part 600 may include a second packing member 610, a second packing inserting member 620, and a second packing fixing member 630.

The cylinder 100 has a hollow cylindrical shape as shown in FIGS. 7 to 10, and the front front housing 120 and the rear rear housing 130 are symmetrical to each other back and forth based on the central body 110. Combined to look at it. At this time, the cylinder 100 is a rotating flow path 140 as shown in FIG. 8 so that the movable vane 400 to be described later swings inside the body 110, the front housing 120, and the rear housing 130. Is formed integrally in an annular shape, and in particular, as shown in FIGS. 9 and 10, the rotation channel 140 of the body 110 is rectangular in cross-section, and the rotation channel of the front housing 120 and the rear housing 130 Each of 140 has a semicircular shape in cross section. In addition, with reference to FIGS. 7 and 8, a control block (not shown) coupled to the upper portion of the cylinder 100 in the drawing provides a supply function of supplying hydraulic oil to the inside of the cylinder 100 and controls the supply of hydraulic oil. It performs a control function, and in other drawings, the control block is omitted.

The rotation shaft 200 is inserted into the cylinder 100 along the front and rear longitudinal direction to be rotatably installed as shown in Figs. 7 to 11, and is centrally positioned to be located inside the body 110 of the cylinder 100. In the enlarged diameter 210 is formed stepped. The rotation shaft 200 is coupled with a movable vane 400 to be described later through an expansion unit 210 to rotate according to the oscillation of the movable vane 400, and an operation unit (not shown) that operates according to the rotation angle is disposed on the output shaft. It is connected to receive the rotational force of the rotation shaft 200 to swing.

As shown in FIG. 9, between the outer circumferential surface of the expanding portion 210 of the rotating shaft 200 and the inner circumferential surface of the body 110 of the cylinder 100 becomes a rectangular rotating passage 140 in cross section, and such a rectangular rotating passage ( 140) A rotation passage 140 is formed in a semicircular shape on the facing surfaces of the front housing 120 and the rear housing 130 in the front and rear directions.

The fixed vane 300 is fixedly installed so as to protrude from the inner circumferential surface of the cylinder 100 toward the inner diameter as shown in FIGS. 8 to 10. This fixed vane 300 is to perform a stopper function when the movable vane 400 to be described later swings, and is to swing the movable vane 400 by a predetermined rotation angle. A second packing part 600 to be described later is also installed in the fixed vane 300, which may be installed in the same configuration as the first packing part 500 coupled to the movable vane 400 to be described later.

The movable vane 400 is coupled to the outer circumferential surface of the enlarged portion 210 of the rotation shaft 200 so as to protrude toward the outer diameter as shown in Figs. 8 to 11, and according to the supply of hydraulic oil into the cylinder 100 The rotation shaft 200 is rotated while swinging left and right based on the fixed vane 300. In the drawing, for convenience of explanation, a single vane type in which the number of fixed vanes 300 and movable vanes 400 are installed one by one is shown, but double vane type by increasing the number of fixed vanes 300 and movable vanes 400 Or it can be configured as a triple vane type. That is, the number of fixed vanes 300 and movable vanes 400 may be determined and designed according to the required rotation angle and torque.

Here, the fixed vane 300 is fixedly installed so as to protrude from the inner circumferential surface of the cylinder 100 toward the inner diameter, and the movable vane 400 is also coupled to protrude toward the outer circumferential surface of the expanding portion 210 of the rotating shaft 200 Therefore, each of the fixed vanes 300 and the movable vanes 400 should have a shape that matches the shape of the rotation channel 140 formed inside the cylinder 100, and the rotation channel 140 inside the cylinder 100 When hydraulic oil is supplied to and rotates while the movable vane 400 swings, a packing part must be provided so that the hydraulic oil supplied in the opposite direction beyond each of the fixed vane 300 and the movable vane 400 does not leak.

First, as shown in FIGS. 8 to 11, the front and rear ends of the movable vanes 400 protrude in a semicircular shape so that they are formed in a cross-sectional shape with the rotation passage 140 of the cylinder 100, so that the left and right sides are semicircles in front and rear in the center rectangle. They have a shape connected to face each other. That is, it has the same shape as the shape of the rotation passage 140 of the cylinder 100 described above.

At this time, a pair of first packing parts 500 are coupled to the left and right sides of the movable vane 400, that is, the first packing part 500 is the rotational passage 140 as shown in FIGS. 8, 10 and 11. A pair is provided to be coupled to each of the left and right side surfaces of the movable vane 400 to contact the inner peripheral surface of ). As shown in FIG. 12, the first packing part 500 has a first packing member 510 having an outer circumferential surface in contact with the inner circumferential surface of the rotation passage 140, and the first packing member 510 ), and the first packing inserting member 520 inserted in the inner diameter direction of the first packing member 510 and the first packing inserted into the left or right side of the movable vane 400 It is fixedly coupled with the member 520 by a bolt (B), and includes a first packing fixing member 530 for fixing the first packing member 510 to the left or right side of the movable vane 400.

The first packing member 510 is a member that is in close contact with the rotation channel 140 of the cylinder 100, and is a strong, tough and smooth non-flammable fluororesin having good chemical resistance and maintaining physical properties over a wide temperature range. Polymers are used. Therefore, the outer peripheral surface of the first packing member 510 should be manufactured and installed so that it protrudes in the outer diameter direction than the outer peripheral surface of the left and right sides of the movable vane 400 or the outer peripheral surface of the first packing fixing member 530.

In other words, the first packing member 510, as shown in Figs. 12 and 13, the first inlet fixing groove 511 is formed in a ring shape in a ring shape on the surface facing the first packing fixing member 530, , The first packing fixing member 530 has a ring shape along the circumference of the surface facing the first packing member 510, and the first insertion rib 531 is the first inflow of the first packing member 510 It is inserted into the fixing groove 511 to fix the first packing member 510.

A pair is provided on the left and right sides of the movable vane 400 that swings left and right through the configuration of the first packing part 500 as described above, and the first packing member 510 as a whole along the circumference of the rotation channel 140 It is able to prevent oil leakage due to adhesion. At this time, as the first packing member 510 of the first packing part 500 is worn out due to long use, a leakage problem may occur. To prevent this, the first packing member 510 It is necessary to configure it so that it can be pressed toward and expanded in the outer radial direction.

Accordingly, as shown in FIG. 13, the first packing fixing member 530 has a thickness of the first insertion rib 531 smaller than that of the first inflow fixing groove 511, and the first insertion rib 531 ) And a first inflow gap 532 in the outer diameter direction and a first inflow gap 533 in the inner diameter direction are formed between the first inflow fixing groove 511. At this time, the first packing member 510 flows into the first outer diameter inflow interval 532 and the outer peripheral surface is pressed in the outer diameter direction to expand. Through this, it is possible to further increase the adhesion effect between the inner circumferential surface of the rotation passage 140 of the cylinder 100 and the outer circumferential surface of the first packing member 510, thereby further minimizing the problem of oil leakage, and the first packing member 510 through long use. Even if abrasion occurs, it can have the same adhesion effect as in the initial installation due to the expansion effect by continuous pressure.

When the first packing member 510 is pressed and expanded only in the outer diameter direction, if the opposite force in the inner diameter direction does not act, even if the first packing member 510 is fixed to the first packing fixing member 530 Micro leakage may occur due to twisting or changing position. Therefore, it is necessary to secure the position of the first packing member 510 by expanding the pressure in the inner diameter direction in a direction opposite to the pressure expansion in the outer diameter direction of the first packing member 510.

That is, the first packing fixing member 530 penetrates so that a plurality of first operation inflow holes 534 communicate with the first inner diameter inflow gap 533 along the circumference of the side as shown in FIGS. 15 and 16. Is formed, the hydraulic oil flows from each of the first hydraulic oil inflow holes 534 into the first inner diameter inflow gap 533 to pressurize the inner peripheral surface of the first packing member 510 in the inner diameter direction to expand. Therefore, in order to increase the adhesion effect of the first packing member 510 with the inner circumferential surface of the rotation passage 140, hydraulic oil is introduced through the first outer-diameter inflow gap 532, so that the outer circumferential surface of the first packing member 510 is When the pressure is expanded in the direction, hydraulic oil flows into the first inner radial inflow interval 533 through the first operating oil inflow hole 534 of the first packing fixing member 530 so that the inner peripheral surface of the first packing member 510 By pressing and expanding in the inner diameter direction, the first packing member 510 is prevented from being twisted or its position is changed, so that the position can be reliably fixed.

On the other hand, the fixed vane 300 also has the same shape as the movable vane 400, and the front and rear ends have a semicircular shape so as to be cross-sectionally shaped with the rotational passage 140 of the cylinder 100 as shown in Figs. It is formed to protrude and has a shape in which the left and right sides are connected to each other so that the semicircles face each other in a central rectangle. That is, it has the same shape as the shape of the rotation passage 140 of the cylinder 100 described above.

At this time, a pair of second packing parts 600 are also coupled to the left and right sides of the fixed vane 300, that is, the second packing part 600 is the rotation channel 140 as shown in FIGS. A pair is provided so as to be coupled to each of the left and right side surfaces of the fixed vanes 300 so as to contact the inner circumferential surface. As shown in FIG. 12, the second packing part 600 has a second packing member 610 whose outer circumferential surface is in contact with the inner circumferential surface of the rotation channel 140 in a ring shape, and the second packing member 610 has an outer circumferential surface thereof. ) And the second packing inserting member 620 inserted into the inner diameter direction of the second packing member 610, and the second packing inserted into the left or right side of the fixed vane 300 A second packing fixing member 630 is fixedly coupled with the member 620 by a bolt (B), and fixes the second packing member 610 to the left or right side of the fixed vane 300.

Like the first packing member 510 described above, the second packing member 610 is a member that is in close contact with the rotation channel 140 of the cylinder 100 and is made of a strong, tough and smooth non-flammable fluororesin that has chemical resistance. A polymer polymer that maintains its physical properties in a good and wide temperature range is used. Therefore, the outer peripheral surface of the second packing member 610 should be manufactured and installed so that it protrudes in the outer diameter direction than the outer peripheral surface of the left and right side surfaces of the fixed vane 300 or the outer peripheral surface of the second packing fixing member 630.

That is, the second packing member 610 also, as shown in Figs. 12 and 14, the second inflow fixing groove 611 is formed in a ring shape on the surface facing the second packing fixing member 630 , The second packing fixing member 630 has a ring shape along the circumferential surface facing the second packing member 610, and the second insertion rib 631 is the second inflow of the second packing member 610 It is inserted into the fixing groove 611 to fix the second packing member 610.

Through the configuration of the second packing part 600 as described above, a pair is provided on the left and right sides of the fixed vane 300, respectively, and the second packing member 610 is in close contact with the entire circumference of the rotating passage 140 to leak oil. Can be prevented. At this time, as the second packing member 610 of the second packing part 600 is also worn due to long use, a leakage problem may occur. To prevent this, the second packing member 610 It is necessary to configure it so that it can be pressed toward and expanded in the outer radial direction.

Accordingly, the second packing fixing member 630 also has a thickness of the second insertion rib 631 being smaller than the thickness of the second inflow fixing groove 611 as shown in FIG. 14. A second inflow gap 632 in the outer diameter direction and a second inflow gap 633 in the inner diameter direction are formed between the 631) and the second inflow fixing groove 611, respectively. At this time, the second packing member 610 is expanded by pressing the hydraulic oil into the second outer diameter inflow interval 632 to press the outer peripheral surface in the outer diameter direction.

In addition, the second packing fixing member 630 penetrates so that a plurality of second operation inflow holes 634 communicate with the second inner diameter inflow gap 633 along the circumference of the side as shown in FIGS. 15 and 17. Is formed, the hydraulic oil is introduced from each of the second hydraulic oil inlet holes 634 into the second inner diameter inflow gap 633 to pressurize the inner peripheral surface of the second packing member 610 in the inner diameter direction to expand.

The configuration and function of the second packing part 600 installed in the fixed vane 300 is also the same as the first packing part 500 installed in the movable vane 400, but the difference between being fixed and moving by swinging However, there is no need to make a difference in composition in that both are identically intended to prevent leakage. In addition, as shown in Figs. 12 and 15, the fixed vane 300 and the movable vane 400 have the same shape, but the left and right sides of the fixed vane 300 or the movable vane 400 according to the required rotation angle It may be possible to apply different lengths.

As described above, the hydraulic oscillating actuator according to the present invention structurally solves the oil leakage problem through a completely new movable vane 400 and the first packing part 500 structure different from the conventional one, as well as the first packing member Even if abrasion of the 510 occurs, the hydraulic oil flows through the first outer-diameter inflow gap 532 of the first packing fixing member 530, and the outer peripheral surface of the first packing member 510 is pressed and expanded in the outer-diameter direction. There is an effect that can significantly improve durability by maintaining the same performance as during installation for a long time.

In addition, when hydraulic oil is introduced through the first outer diameter inflow gap 532 of the first packing fixing member 530 and the outer peripheral surface of the first packing member 510 is pressed and expanded in the outer diameter direction, the first packing fixing member As hydraulic oil flows through the first inner radial inflow interval 533 of 530, the inner peripheral surface of the first packing member 510 is pressed in the inner radial direction to expand so that the first packing member 510 is twisted or the position is displaced. There is an effect that can reliably prevent problems such as doing.

In addition, a change in the structure of the movable vane 400 and the first packing part 500 and the shape of the rotating flow path 140 inside the cylinder 100, the fixed vane 300 and the second packing part 600 Through this, as well as preventing a further reinforced leakage problem, there is an effect that can also bring improvement in performance and durability of the second packing part 600.

Embodiments of the present invention described above and shown in the drawings should not be construed as limiting the technical idea of the present invention. The protection scope of the present invention is limited only by the matters described in the claims, and those of ordinary skill in the technical field of the present invention can improve and change the technical idea of the present invention in various forms. Therefore, such improvements and changes will fall within the scope of the present invention as long as it is apparent to those of ordinary skill in the art.

B: bolt
100: cylinder 110: body
120: front housing 130: rear housing
140: rotating flow path
200: rotating shaft 210: expanding part
300: fixed vane
400: movable vane
500: first packing part
510: first packing member 511: first inflow fixing groove
520: first packing insertion member
530: first packing fixing member 531: first insertion rib
532: first outer diameter inflow interval 533: first inner diameter inflow interval
534: first operating oil inlet hole
600: second packing part
610: second packing member 611: second inflow fixing groove
620: second packing insertion member
630: second packing fixing member 631: second insertion rib
632: second outer diameter inflow interval 633: second inner diameter inflow interval
634: second operating oil inlet hole

Claims (11)

A cylinder in which the inside is hollow and the front front housing and the rear rear housing in the front are viewed symmetrically back and forth based on the central body, and are inserted in the cylinder along the longitudinal direction to be rotatably installed, A rotation shaft in which a diameter expansion part is stepped in the center so as to be located inside the body of the cylinder, a fixed vane fixedly installed so as to protrude from the inner circumferential surface of the cylinder toward the inner diameter, and the outer circumferential surface of the expanding part of the rotation shaft are combined so as to protrude toward the outer diameter And, it includes a movable vane for rotating the rotating shaft while swinging left and right based on the fixed vane according to the supply of hydraulic oil into the cylinder,
The cylinder,
A rotation channel is integrally formed in an annular shape so that the movable vane swings left and right inside the body, the front housing and the rear housing, and the rotation channel of the body has a rectangular shape in cross section, and the rotation channel of the front housing and the rear housing is Each has a semicircular shape in cross section,
Each of the movable vanes and the fixed vanes,
The front and rear ends are formed to protrude in a semicircular shape so that the rotation flow path of the cylinder and the cross-sectional shape are connected so that the left and right sides are connected to each other so that the semicircles face each other in a central rectangle,
Further comprising a pair of first packing portions respectively coupled to the left and right side surfaces of the movable vane so as to contact the inner circumferential surface of the rotation channel,
The first packing part,
A first packing member whose outer circumferential surface is in contact with the inner circumferential surface of the rotation channel in a ring shape,
A first packing inserting member that contacts the outer circumferential surface to fit into the inner circumferential surface of the first packing member and is inserted into the inner diameter direction of the first packing member,
And a first packing fixing member fixedly coupled to the left or right side of the movable vane with bolts together with the first packing inserting member, and fixing the first packing member to the left or right side of the movable vane Hydraulic oscillating actuator.
delete The method of claim 1,
The first packing member,
A first inflow fixing groove is formed in a ring shape on the surface facing the first packing fixing member,
The first packing fixing member,
A first insertion rib protrudes in a ring shape along a circumference of the surface facing the first packing member, and the first insertion rib is inserted into the first inlet fixing groove of the first packing member to fix the first packing member Hydraulic oscillation type actuator, characterized in that to.
The method of claim 3,
The first packing fixing member,
The thickness of the first insertion rib is smaller than the thickness of the first inflow fixing groove, and a first inflow gap in the outer diameter direction between the first insertion rib and the first inflow fixing groove and a first inflow gap in the inner diameter direction Hydraulic rocking actuator, characterized in that each formed.
The method of claim 4,
The first packing member,
Hydraulic oscillating actuator, characterized in that hydraulic oil is introduced at the first outer diameter inflow interval and the outer peripheral surface is pressurized in the outer diameter direction to expand.
The method of claim 4,
The first packing fixing member,
A plurality of first operating inflow holes are formed through the circumference of the side to communicate with the first inflow gap in the inner diameter direction, and hydraulic oil is introduced from each of the first hydraulic inflow holes into the first inflow gap in the inner diameter direction, and the first packing Hydraulic rocking actuator, characterized in that expanding by pressing the inner peripheral surface of the member in the inner diameter direction.
The method of claim 1,
Further comprising a pair of second packing portions respectively coupled to the left and right side surfaces of the fixed vane to contact the inner circumferential surface of the rotation channel,
The second packing part,
A second packing member in which the outer circumferential surface is in contact with the inner circumferential surface of the rotation channel in a ring shape,
A second packing inserting member that contacts the outer circumferential surface to fit into the inner circumferential surface of the second packing member, and is inserted into the inner diameter direction of the second packing member,
And a second packing fixing member fixedly coupled to the left or right side of the fixed vane with bolts together with the second packing inserting member, and fixing the second packing member to the left or right side of the fixed vane Hydraulic oscillating actuator.
The method of claim 7,
The second packing member,
A second inflow fixing groove is formed in a ring shape on the surface facing the second packing fixing member,
The second packing fixing member,
A second insertion rib protrudes in a ring shape along a circumference on a surface facing the second packing member, and the second insertion rib is inserted into a second inlet fixing groove of the second packing member to fix the second packing member Hydraulic oscillation type actuator, characterized in that to.
The method of claim 8,
The second packing fixing member,
The thickness of the second insertion rib is smaller than the thickness of the second inlet fixing groove, and a second inflow gap in the outer diameter direction between the second insertion rib and the second inflow fixing groove and a second inflow gap in the inner diameter direction Hydraulic rocking actuator, characterized in that each formed.
The method of claim 9,
The second packing member,
Hydraulic oscillating actuator, characterized in that the hydraulic oil is introduced at the second inflow interval in the outer radial direction and the outer peripheral surface is pressed in the outer radial direction to expand.
The method of claim 9,
The second packing fixing member,
A plurality of second operating inflow holes are formed through the side circumference to communicate with the second inner diameter inflow gap, and hydraulic oil is introduced from each of the second hydraulic inflow holes into the second inflow gap in the second inner diameter direction, and the second packing Hydraulic rocking actuator, characterized in that expanding by pressing the inner peripheral surface of the member in the inner diameter direction.

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