KR102079879B1 - Moving-vane separation type hydraulic rotary actuator - Google Patents

Abstract

The present invention relates to a moving vane separation-type hydraulic rotary actuator, which can separate a rotating shaft from a moving vane to ensure ease in processing, can be coupled after being processed to remarkably reduce the defect rate, can easily exchange the rotating shaft or the moving vane during usage as well as can structurally solve an oil leakage problem at the tip end and a side surface of the moving vane through a new packing structure. The present invention comprises: a cylinder having a hollow inside; a rotating shaft installed within the cylinder to be able to rotate in a front and rear longitudinal direction; a fixed vane fixedly installed to protrude in an inner diameter direction from an inner circumferential surface of the cylinder; a moving vane detachably installed and inserted into the rotating shaft to protrude in an outer diameter direction from an outer circumferential surface of the rotating shaft and rotating the rotating shaft while shaking left and right from the fixed vane as a working fluid is supplied into the cylinder; and a packing unit coupled to the tip end of the moving vane in contact with the inner circumferential surface of the cylinder and to front and rear surfaces of the actuating vane in contact with front and rear surfaces within the cylinder, respectively.

Description

Movable vane type hydraulic rotary actuator {MOVING-VANE SEPARATION TYPE HYDRAULIC ROTARY ACTUATOR}

The present invention relates to a hydraulic rotary actuator, and more particularly, a movable vane-type hydraulic type in which a movable vane coupled to a rotary shaft with a fixed vane fixedly fixed in a cylinder, swings left and right in response to the supply of pressure oil. It relates to a rotary actuator.

In general, a device for converting the pressure energy of the hydraulic oil supplied by the hydraulic pump into mechanical energy is collectively referred to as a hydraulic motor (hydraulic motor) or hydraulic actuator (hydraulic actuator).

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

The hydraulic rotary actuator is widely used in various industrial fields because it is fast in response to mechanical force and can make a large force while miniaturizing the device. These hydraulic rotary actuators are also classified into two types according to the flow of hydraulic power as a power source, and there are vane type hydraulic rotary actuators and piston type hydraulic rotary actuators. The piston type has the advantage of being resistant to leakage compared to the vane type, but has the disadvantage that the overall device is large and complex, on the contrary, the vane type has the disadvantage of being weak against leakage although having a compact advantage of a simple structure.

Among these vane type hydraulic rotary actuators, as shown in FIGS. 1 to 3, the movable vanes 40 integrally formed on the rotating shaft 30 based on the fixed vanes 20 in the cylinder 10 are left and right according to the supply of hydraulic pressure. As the structure to rotate the rotating shaft 30 by swinging, it can be divided into the single vane type of Figure 1, the double vane type of Figure 2 and the triple vane type of Figure 3 according to the number of fixed vanes 20 and movable vanes 30 As the number of vanes increases, the rotation angle becomes smaller.

The biggest problem of the vane-type hydraulic rotary actuator as described above is a difficulty in processing the movable vane 40 integrally formed on the rotating shaft 30 with the performance degradation due to leakage. First, a leakage problem occurs at the tip and side of the movable vane 40. That is, as shown in FIG. 1, when the hydraulic oil is supplied in the right direction with respect to the fixed vane 20, the movable vane 40 rotates forward. In this case, 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, the hydraulic oil may leak in the opposite direction beyond the front and the side of the movable vane 40. This, in turn, has a significant impact on performance.

In addition, in the case of the movable vane 40 integrally formed on the rotary shaft 30, the part where the movable vane 40 is formed is difficult to process at once as a lathe, and thus, a complicated machining process must be performed through a separate multi-axis machining center. There is this. In such a complicated process, the failure rate in processing of the shape of the movable vane 40 is high, and thus a problem arises in that the rotary shaft 30 on which the movable vane 40 is formed is disposed of as a whole.

The object of the present invention devised to solve the above problems, as well as structurally solve the problem of leakage of the tip and side of the movable vane through a new packing structure, of course by separating the rotating shaft and the movable vane separately It is to provide a movable vane-type hydraulic rotary actuator that can easily replace the rotating shaft or movable vanes during use, while reducing ease of failure by ensuring ease and combining after processing.

In order to achieve the above object, the movable vane-type hydraulic rotary actuator according to the present invention includes a cylinder having a hollow inside, a rotating shaft rotatably installed along the longitudinal direction in the inside of the cylinder, and an inner peripheral surface of the cylinder. A fixed vane fixedly installed to protrude toward the inner diameter direction, and detachably inserted into the rotating shaft so as to protrude toward the outer diameter direction from the outer circumferential surface of the rotating shaft, the left and right sides of the fixed vane according to the supply of hydraulic oil into the cylinder; And a packing part coupled to the front end of the movable vane in contact with the inner circumferential surface of the cylinder and the front and rear side surfaces of the movable vane respectively in contact with the inner front and rear side surfaces of the cylinder.

In addition, the rotating shaft is formed on the outer circumferential surface on which the movable vane is installed, the enlarged diameter portion having a diameter larger than the front and rear diameter is formed, and a vane installation surface cut in a plane is formed on one outer circumferential surface of the enlarged diameter portion, The vane insertion groove is recessed toward the inner diameter direction, and the movable vane extends in the outer diameter direction from the vane insertion portion to protrude toward the outer diameter direction from the vane insertion portion inserted into the vane insertion groove and from the vane installation surface. Characterized in that it comprises a vane moving portion formed.

In addition, the movable vane is characterized in that the step-expansion surface is formed to be stepped to extend the vane moving portion extending from the vane insertion portion.

The movable vane may further include a vane sealing member inserted into the vane inserting portion and interposed between the vane installation surfaces of the rotary shaft contacting the stepped extension surface of the vane moving portion.

In addition, the vane moving part of the movable vane is formed with a 'c' shaped packing groove which is opened downward on the side cross-section on the basis of the front and rear direction, and the packing part is' It characterized in that it comprises a '-shaped packing sealing member, and the' c 'shaped packing member which is opened downwardly inserted into the packing groove of the vane moving part to surround the outer side of the packing sealing member.

In addition, the vane moving portion of the movable vane is formed with a lateral expansion groove extending in a circular shape at the front lower and rear lower ends of each of the longitudinal sides of the packing groove, the packing sealing member of the packing portion, the side expansion groove of the packing groove And a lateral extension sealing member circularly extended at each of the front lower end and the rear lower end so as to respectively correspond to the packing member, and the packing member of the packing part is circular at each of the front lower end and the rear lower end so as to correspond to the lateral expansion groove of the packing groove, respectively. It characterized in that it comprises an extended side expansion packing member.

The movable vane-type hydraulic rotary actuator according to the present invention, through the new structure of the packing groove shape and the packing portion of the movable vane, also solves the problem of leakage of the tip and side of the movable vane structurally, and separates the rotating shaft and the movable vane separately. By separating and securing the ease of processing, by combining after processing significantly reduces the failure rate, there is an effect that can easily replace the rotating shaft or movable vanes when in use.

In particular, the movable movable vane structure for the rotating shaft forms the enlarged diameter portion, the vane installation surface and the vane insertion groove of the rotating shaft, and divides the movable vane into the vane insertion portion and the vane moving portion based on the step difference extension surface. In between the vane sealing member through the close contact between the rotating shaft and the movable vane can solve the problem of leakage.

1 is a cross-sectional view showing a single vane type hydraulic rotary actuator according to the prior art,
Figure 2 is a cross-sectional view showing a double vane type hydraulic rotary actuator according to the prior art,
3 is a cross-sectional view showing a triple vane type hydraulic rotary actuator according to the prior art,
Figure 4 is a perspective view showing an embodiment of the movable vane type separate hydraulic rotary actuator according to the present invention,
5 is a cross-sectional perspective view taken from the line AA ′ of the embodiment of FIG. 4,
FIG. 6 is a cross-sectional view taken along line AA ′ of the embodiment of FIG. 4;
7 is a perspective view illustrating main parts of an embodiment of a rotating shaft, a movable vane, and a packing part of the movable vane type separate hydraulic rotary actuator according to the present invention;
8 is an exploded perspective view of the embodiment of FIG.
9 is a cross-sectional view taken along line B-B 'of the embodiment of FIG.
FIG. 10 is a cross-sectional view of the movable vane and the packing part separated from the rotating shaft in the embodiment of FIG. 9.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the movable vane type separate hydraulic rotary actuator according to the present invention.

The movable vane separate hydraulic rotary actuator according to the present invention includes a cylinder 100, a rotating shaft 200, a fixed vane 300, a movable vane 400, and a packing part 500, as shown in FIGS. 4 to 10. It is done by In addition, the rotating shaft 200 includes an enlarged diameter portion 210, the vane installation surface 220 and the vane insertion groove 230, the movable vane 400 is a vane insertion portion 410, the vane moving portion 420 It may include a step extending surface 430 and the vane sealing member 440. In addition, the packing part 500 may include a packing sealing member 510 and a packing member 520.

The cylinder 100 has a cylindrical shape with a hollow inside, as shown in FIGS. 4 to 6, but the reference numeral may be divided into a front front housing, a central body, and a rear rear housing. The inner front and rear sides of the front housing and the rear housing are in contact with the front and rear sides of the movable vanes 400, which will be described later, and the front and rear housings and the inner circumferential surfaces of the body are in contact with the tip of the movable vanes 400. At this time, the packing part 500 to be described later is coupled on the front end and front and rear side of the vane moving part 420 of the movable vane 400 to be in close contact with the inner front and rear and inner peripheral surface of the cylinder 100 to prevent leakage during operation. In addition, the control block (not shown) coupled to the upper portion of the cylinder 100 in the drawings with reference to FIGS. 4 to 6 is a supply function for supplying the hydraulic oil into the cylinder 100, and to control the supply of the hydraulic oil Perform control functions.

As shown in FIGS. 4 to 11, the rotation shaft 200 is rotatably installed in the longitudinal direction of the cylinder 100. The rotary shaft 200 is detachably coupled to the movable vane 400 to be described later, and rotates according to the swing of the movable vane 400, and the output shaft is connected to an operating part (not shown) that operates according to the rotation angle (not shown). The rotation force of 200 is transmitted. Since the rotary shaft 200 is separated and processed separately from the movable vane 400 to be described later, there is an advantage that it can be easily processed by only a simple lathe, and the enlarged diameter portion 210 and the vane installation surface of the rotary shaft 200 to be described later ( 220 and the vane insertion groove 230 may be easily achieved through simple lathe machining and milling.

The fixed vane 300 is fixedly installed to protrude toward the inner diameter direction from the inner circumferential surface of the cylinder 100, as shown in FIGS. The fixed vane 300 performs a stopper function when the movable vane 400 swings, which will be described later, to swing the movable vane 400 by a predetermined rotation angle. Packing (not shown) is also installed in the inner diameter direction front end and the front and rear side of the fixed vane 300, which is the same as the packing part 500 coupled to the vane moving part 420 of the movable vane 400 to be described later. Can be installed as

The movable vane 400 is detachably inserted into the rotating shaft 200 so as to protrude toward the outer diameter direction from the outer circumferential surface of the rotating shaft 200 as illustrated in FIGS. 5 to 10, and moves into the cylinder 100. Rotating the rotating shaft 200 while swinging from side to side based on the fixed vane 300 in accordance with the supply of the hydraulic oil. Since the movable vanes 400 are processed separately from the rotating shaft 200, the movable vanes 400 may be simplified, and thus the movable vanes 400 may be inserted into the rotating shaft 200. .

More specifically, as the structure for inserting the movable vanes 400 to the rotary shaft 200, the rotary shaft 200 is shown in Figures 7 to 10, the expansion diameter 210, the vane installation surface 220 and The vane insertion groove 230 may be recessed, and the movable vane 400 may include a vane insertion unit 410 and a vane moving unit 420.

That is, the rotating shaft 200 is formed on the outer circumferential surface on which the movable vanes 400 are installed, the enlarged diameter portion 210 having a diameter larger than the front and rear diameters, and the vane cut in a plane on one side outer circumferential surface of the enlarged diameter portion 210. An installation surface 220 is formed, and the vane insertion groove 230 is recessed in the vane installation surface 220 toward the inner diameter direction. At this time, the movable vane 400 is the vane insertion portion 410 is inserted into the vane insertion groove 230 and the vane insertion portion 410 to protrude toward the outer diameter direction from the vane installation surface 220 And a vane moving part 420 extending in the outer diameter direction.

Here, the movable vane 400 is formed with a stepped extension surface 430 in which the vane moving portion 420 extending from the vane insertion portion 410 is stepped, and the stepped extension surface 430 is the It coincides with the vane installation surface 220 of the rotating shaft 200. Therefore, if the close contact between the vane installation surface 220 of the rotary shaft 200 in contact with the step expansion surface 430 can solve the problem of leakage between the rotary shaft 200 and the movable vane (400). To this end, the movable vane 400 is inserted into the vane inserting portion 410 and between the vane installation surface 220 of the rotating shaft 200 in contact with the stepped extension surface 430 of the vane moving portion 420. It may include a vane sealing member 440 interposed therein. The vane sealing member 440 is an elastic deformation body that is deformed when a pressure such as natural rubber, synthetic rubber or synthetic resin is applied as a function and a material such as an o-ring.

For convenience of description in the drawings, the number of the fixed vanes 300 and the movable vanes 400 is illustrated in the form of a single vane, but the fixed vanes 300 and the movable vanes as shown in FIGS. It is also possible to configure the number of double vanes or triple vanes by increasing the number of 400). That is, the number of the fixed vanes 300 and the movable vanes 400 may be determined and designed according to the required rotation angle and torque.

As described above, the movable vane 400 inserting structure for the rotating shaft 200 is first separated from the rotating shaft 200 and the movable vane 400 to secure the convenience of processing through simple machining, and the rotating shaft even when combined. Close contact between the 200 and the movable vanes 400 can solve the oil leakage problem. Secondly, even if any one of the rotary shafts 200 or the movable vanes 400 is defective in processing, the whole can be discarded. There is no need to significantly reduce the production cost, and third, only need to replace any one that has a problem even if the replacement is required due to wear or breakage of any one of the rotary shaft 200 or the movable vanes 400 due to long operation As a result, maintenance is very economical.

The packing part 500 is the movable vane which is in contact with the front end of the movable vane 400 in contact with the inner circumferential surface of the cylinder 100 and the inner front and rear sides of the cylinder 100, respectively, as shown in FIGS. 5 to 7. It is coupled to the front and rear sides of the 400 to prevent leakage during operation. When the hydraulic oil is supplied to the inside of the cylinder 100 to swing the movable vanes 400 to rotate the rotary shaft 200, the packing part 500 is coupled to the front and front and rear surfaces of the movable vanes 400, and the packing part ( 500 is in close contact with the inner circumferential surface of the cylinder 100 and the inner front and rear sides of the cylinder 100 to prevent leakage in the direction opposite to the direction in which the hydraulic oil is supplied.

The packing part 500 may include a sealing member 510 and a packing member 520, as shown in FIGS. 5 to 11. Sealing member 510 is a function and a material such as o-ring (o-ring), such as the above-mentioned vane sealing member 400, is an elastic deformation member deforms when a pressure such as natural rubber, synthetic rubber or synthetic resin is applied, packing member 520 is a member that is in close contact with the actual cylinder 100, a strong, tough and smooth non-flammable fluorine resin using a chemical polymer having good chemical resistance and physical properties maintained over a wide temperature range. In the present invention, the sealing member 510 and the packing member 520 have a specific feature in the shape thereof, and the packing groove 410 formed in the vane moving part 420 of the movable vane 400 is also corresponding thereto. It has a shape.

That is, as shown in FIGS. 8 to 10, the vane moving part 420 of the movable vane 400 is formed with a 'c'-shaped packing groove 421 having a lower side opening on the side cross section based on the front and rear direction, and the packing The part 500 includes a 'c'-shaped sealing member 510 having a downward opening to be inserted into the packing groove 421 of the vane moving part 420 and the vane moving part so as to surround the outside of the sealing member 510. It may include a 'c' shaped packing member 520 is opened downwardly inserted into the packing groove 421 of the 420.

In this case, the vane moving part 420 of the movable vane 400 is formed with a side extension groove 422 extending in a circular shape at the front lower and rear lower ends of each of the longitudinal sides of the packing groove 421, and also the packing part. The sealing member 510 of the 500 includes a lateral expansion sealing member 511 extended in a circular shape on each of the front lower end and the rear lower end so as to correspond to the lateral expansion groove 422 of the packing groove 421, respectively. In addition, the packing member 520 of the packing part 500 also has a side extension packing member 521 which is circularly extended at each of the front lower and rear lower ends so as to correspond to the side extension grooves 422 of the packing groove 421, respectively. It includes.

That is, the overall shape of the packing part 500 for packing the tip and front and rear sides of the vane moving part 420 of the movable vane 400 is a 'c' shape having a lower opening, and a circular shape at the bottom of the vertical sides of the 'c' shape. The expansion groove and the expansion member of each is provided. This structure is characterized in that, first, the packing portion 500 can be easily assembled in the order above the packing groove 421, and easily assembled, and the second side expansion groove 422, the side expansion sealing member 511 and the side surface. It is characterized by the fact that the position is clearly fixed even if it is pressurized by the elastic deformation in the inside through the expansion packing member 521, the third circular structure has the effect that the overall shape is expanded and deformed in a circular shape when the shape is changed to be described later Because there is.

In other words, the packing part 500 for packing the tip and front and rear sides of the vane moving part 420 of the movable vane 400 is in close contact with the inner circumferential surface and the inner front and rear sides of the cylinder 100 to operate according to the forward or reverse rotation. In this case, even if the packing part 500 is elastically deformed, the position is not changed and the fixed state is maintained while being pressed toward the inner circumferential surface and the inner front and rear side surfaces of the cylinder 100 to further increase the adhesion effect, thereby minimizing leakage problems. .

As described above, the movable vane separation type hydraulic rotary actuator according to the present invention has a shape of the packing groove 421 of the movable vane 400 and a new structure of the packing part 500 to leak oil at the tip and side of the movable vane 400. Not only solve the problem structurally, but also separate the rotary shaft 200 and the movable vane 400 to ensure the ease of processing, by combining after machining significantly reduce the failure rate by using the rotary shaft 200 or movable The vane 400 has an effect that can be easily replaced.

In particular, the structure of the removable movable vane 400 for the rotary shaft 200 forms the enlarged diameter portion 210, the vane installation surface 220 and the vane insertion groove 230 of the rotary shaft 200, and moves the movable vane 400. The vane insertion part 410 and the vane moving part 420 are divided based on the stepped extension surface 430, and the rotating shaft 200 is formed through the vane sealing member 440 between the rotating shaft 200 and the movable vane 400. ) And the close contact between the movable vane 400 can solve the oil leakage problem.

Embodiments of the present invention described above and illustrated 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 skilled in the art can change and change the technical idea of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it will be apparent to those skilled in the art.

100: cylinder
200: rotation axis 210: diameter part
220: vane installation surface 230: vane insertion groove
300: fixed vane
400: movable vane
410: vane insertion unit 420: vane moving unit
421: Packing groove 422: Side expansion groove
430: step expansion surface 440: vane sealing member
500: packing part
510: sealing member 511: side sealing member
520: packing member 521: side expansion packing member

Claims (6)

A cylinder having a hollow inside, a rotating shaft rotatably installed in the cylinder in the longitudinal direction, a fixed vane fixedly protruding from the inner circumferential surface of the cylinder toward the inner diameter direction, and an outer diameter direction from the outer circumferential surface of the rotating shaft The vane is detachably inserted into the rotary shaft so as to protrude toward the movable shaft, and the movable vane rotates the rotary shaft while swinging from side to side with respect to the fixed vane according to the supply of the hydraulic oil into the cylinder, and the contacting inner circumferential surface of the cylinder. And a packing part coupled to the front and rear side surfaces of the movable vane, the front end of the movable vane and the inner front and rear side surfaces of the cylinder, respectively.
The rotation axis is,
An enlarged diameter portion having a diameter larger than the front and rear diameter is formed on the outer circumferential surface on which the movable vane is installed, and a vane mounting surface cut in a plane is formed on one outer circumferential surface of the enlarged diameter portion, and the vane is inserted into the vane mounting surface toward the inner diameter direction. Grooves are formed,
The movable vane,
And a vane insertion portion inserted into and installed in the vane insertion groove, and a vane moving portion extending outwardly from the vane insertion portion so as to protrude toward the outer diameter direction from the vane installation surface.
The vane moving part of the movable vane,
A 'c' shaped packing groove is formed which is opened downward on the side cross section based on the front and rear directions,
The packing unit,
'C' shaped packing sealing member having an opening downwardly inserted into the packing groove of the vane moving part, and 'c' shaped packing member having an opening downwardly inserted into the packing groove of the vaning moving part so as to surround the outside of the packing sealing member. Including,
The vane moving part of the movable vane,
Circularly extending side extending grooves are formed at the front lower and rear lower ends of the longitudinal sides of the packing groove,
The packing sealing member of the packing part,
And a side extension sealing member extending in a circular shape at each of the front lower end and the rear lower end so as to correspond to the side extension grooves of the packing groove, respectively.
The packing member of the packing part,
Moving vane-type hydraulic rotary actuator, characterized in that it comprises a side expansion packing member circularly extended to each of the front lower and rear lower end to correspond to the side expansion groove of the packing groove, respectively.
delete The method of claim 1,
The movable vane,
Moving vane separate hydraulic rotary actuator, characterized in that the step extending surface is formed to extend stepwise the moving portion extending from the vane insertion portion.
The method of claim 3,
The movable vane,
And a vane sealing member inserted into the vane inserting portion and interposed between the vane installation surfaces of the rotary shaft contacting the stepped extension surface of the vane moving portion.
delete delete

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