KR20220067367A - Multi-functional Control valve for hydraulic motor - Google Patents

Abstract

A multifunctional control valve of a hydraulic motor of the present invention comprises: a poppet having a head part at one end part of a body part to open and close a passage; a plug into which the other end part of the poppet is selectively inserted and a plurality of through holes formed in an axial direction of the body part; a poppet spring provided between the poppet and the plug to provide elastic force to open the poppet; a damper into which the plug is slidably inserted; a casing into which the damper is slidably inserted; and a damper spring provided between the damper and the casing to provide elastic force to open the damper. An objective of the present invention is to provide the multifunctional control valve of a hydraulic motor that is easy to assemble, resistant to wear, and has improved flow characteristics.

Description

Multi-functional Control valve for hydraulic motor

The present invention relates to a multi-function control valve for a hydraulic motor, and more particularly, to a multi-function control valve for a hydraulic motor that is easy to assemble and has improved flow characteristics by improving an assembly structure and a shape of a flow hole.

In general, since multi-function valves used in construction machines have a very complex structure, the problem of improving the shape and structure of the valve is emerging. In particular, since the multifunctional integrated check valve of the variable displacement hydraulic motor that opens and closes two or more flow paths has a very compact structure, a structure that exhibits optimal performance in a given space is required.

However, in the conventional valve structure, it is difficult to improve the flow rate characteristics, and since there are many difficulties during assembly, substantial improvement is required.

Laid-Open Patent Publication No. 10-2011-0125502

An object of the present invention is to provide a multifunctional control valve for a hydraulic motor that is easy to assemble, is not easily worn, and has improved flow characteristics.

The multi-function control valve of the hydraulic motor of the present invention for achieving the above object, a poppet having a head at one end of the body to open and close the flow path; a plug in which the other end of the poppet is selectively inserted and a plurality of through-holes are formed in the body portion in an axial direction; a poppet spring provided between the poppet and the plug to provide an elastic force to open the poppet; a damper into which the plug is slidably inserted; a casing into which the damper is slidably inserted; and a damper spring provided between the damper and the casing to provide an elastic force to open the damper.

The poppet includes a cylindrical body, a head integrally formed at one end of the body to have a larger outer diameter than the body, a shaft extending from the other end of the body, and a nut fastened to the end of the shaft. may include

The plug includes a guide having a center hole formed therein and sliding on an inner circumferential surface of the damper, and a body integrally formed on an outer circumferential surface of one end of the guide and having a plurality of through-holes formed in the longitudinal direction, the center hole of the guide is formed to be stepped to support one end of the poppet spring and the nut.

The plurality of through-holes of the plug may include a plurality of first holes arranged at predetermined intervals and formed in a circular shape, and a plurality of second holes arranged between the plurality of first holes and formed through two circles overlapping each other. can

The damper includes a body part slidably inserted into the casing, a rib part integrally formed on an outer surface of one end of the body part to open and close a plurality of through-holes of the plug, and a body part formed inside the body part so that the plug It may include a guide groove that is slidably inserted.

The guide of the plug may be formed to have a tolerance of 0 to 0.1 mm between the guide groove of the damper, and the guide of the plug may further include a plurality of chamfers formed on an outer circumferential surface.

The casing includes a main body in which the damper spring is mounted and a central groove into which the damper is slidably inserted, and a flow path formed thinner than the main body at one end of the main body and formed with flow path holes on the circumference. can do.

The passage portion of the casing may be formed such that two circular holes communicate with each other to constitute one passage hole.

The passage portion of the casing may include a plurality of passage grooves in which each passage hole is opened to an end edge of the casing.

According to the multi-function control valve of the hydraulic motor of the present invention described above, it is very easy to assemble by improving the coupling structure of the poppet and the plug.

In addition, it is very easy to manufacture the plug by improving the shape of the through-hole of the plug.

In addition, by improving the shape of the plug guide, it can slide smoothly while reducing the tolerance between it and the damper.

In addition, by improving the shape of the channel hole of the casing, the flow characteristics are improved and the strength and durability are excellent.

1 is a view showing that a multi-function control valve of a hydraulic motor according to an embodiment of the present invention is mounted on a manifold.
Figure 2 is an assembled perspective view showing the multi-function control valve of the hydraulic motor according to an embodiment of the present invention.
3 is a longitudinal cross-sectional view showing a multi-function control valve of a hydraulic motor according to an embodiment of the present invention.
4 is an exploded perspective view showing a multi-function control valve of a hydraulic motor according to an embodiment of the present invention.
5 is a conceptual diagram illustrating two embodiments of a coupling structure of a poppet and a plug.
6 is a conceptual diagram illustrating two embodiments of a shape of a flow hole of a plug.
7 is a conceptual diagram illustrating two embodiments of a shape of a plug guide.
8 is a conceptual diagram illustrating three embodiments of a shape of a passage hole of a casing.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

The terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present invention, terms such as 'comprising' or 'having' are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, it should be noted that in the accompanying drawings, the same components are denoted by the same reference numerals as much as possible. In addition, detailed descriptions of well-known functions and configurations that may obscure the gist of the present invention will be omitted. For the same reason, some components are exaggerated, omitted, or schematically illustrated in the accompanying drawings.

Hereinafter, a multi-function control valve of a hydraulic motor according to an embodiment of the present invention will be described.

1 is a view showing that the multi-function control valve of the hydraulic motor according to an embodiment of the present invention is mounted on the manifold, Figure 2 is an assembled perspective view showing the multi-function control valve of the hydraulic motor according to an embodiment of the present invention , Figure 3 is a longitudinal cross-sectional view showing the multi-function control valve of the hydraulic motor according to an embodiment of the present invention, Figure 4 is an exploded perspective view showing the multi-function control valve of the hydraulic motor according to an embodiment of the present invention.

1 to 4, the multi-function control valve 100 of the hydraulic motor according to an embodiment of the present invention includes a poppet 110 having a head at one end of a body to open and close a flow path, and the other end of the poppet. is selectively inserted and a plurality of through-holes are formed in the body portion in the axial direction; a poppet spring 120 provided between the poppet and the plug to provide an elastic force to open the poppet; It includes a damper 140 , a casing 160 into which the damper is slidably inserted, and a damper spring 150 provided between the damper and the casing to provide an elastic force to open the damper.

First, the multi-function control valve 100 of the present invention may be mounted on a manifold 10 in which a plurality of flow paths are formed, as shown in FIG. 1 . In FIG. 1, the manifold 10 is shown cut to show the mounting grooves and flow paths.

A pair of multi-function control valves 100 may be mounted on the manifold 10 . The manifold 10 includes a first flow path 12 elongated vertically in the center, a pair of second flow paths 14 penetrating both sides of the first flow path 12 , and a pair of second flow paths 14 . ) may include a pair of third flow passages 16 elongated vertically on the outside.

The fluid introduced into the first flow path 12 may be introduced into the second flow path 14 by pushing the poppet 110, and the fluid flowing into the second flow path 14 may push the damper 140 and flow into the third flow path ( 16) can be introduced.

Threads are formed on the outer peripheral surfaces of the plug 130 and the casing 160 , and may be respectively fastened to and coupled to the two threads formed on the manifold 10 . The poppet 110 may be elastically moved by the poppet spring 120 with respect to the plug 130 fixed to the manifold 10 . In addition, the damper 140 may be elastically moved by the damper spring 150 with respect to the casing 160 fixed to the manifold 10 .

The poppet 110 may include a head 114 at one end of the body 112 to open and close the flow path between the first flow passage 12 and the second flow passage 14 .

5 is a conceptual diagram illustrating two embodiments of a coupling structure of a poppet and a plug, and FIG. 6 is a conceptual diagram illustrating two embodiments of a shape of a flow hole of a plug.

As shown in FIG. 5( a ), the poppet 110 has a cylindrical body part 112 and a head part integrally formed at one end of the body part 112 to have a larger outer diameter than the body part 112 . It may include a 114 and a groove 116 formed concavely on the inside of the body portion 112 to support the poppet spring 120 .

The body portion 112 is formed in a cylindrical shape as a whole, and for example, six chamfered surfaces may be formed on the outer circumferential surface.

In order to open and close the flow path between the first flow passage 12 and the second flow passage 14 , the head 114 may have a tapered curved surface. The head 114 may be integrally connected to the body 112 to form a smooth curved surface.

The groove part 116 may be concavely formed inside the other end of the body part 112 to have a depth of about half the length of the body part 112 . The inner diameter of the groove portion 116 is formed to be larger than the outer diameter of the poppet spring 120 , so that more than half of the poppet spring 120 may be inserted into the groove portion 116 to be compressed.

However, in the case of the assembly structure of Figure 5 (a), the poppet spring 120 may be shaken during assembly, it is difficult to assemble accurately, and there is a problem in that it is difficult to fit the initial elastic force when assembling the spring.

As shown in FIG. 5( b ), the poppet 110 has a cylindrical body part 112 and a head part integrally formed at one end of the body part 112 to have a larger outer diameter than the body part 112 . It may include a 114, a shaft portion 117 extending from the other end of the body portion 112, and a nut 118 fastened to the end of the shaft portion.

In the embodiment of FIG. 5( b ), the body part 112 includes a shaft part 117 instead of the groove part 116 . Accordingly, the length of the body part 112 may be reduced by about half compared to the case of the embodiment of FIG. 5( a ). Instead, the shaft portion 117 extends from the other end of the body portion 112 , and a screw thread is formed at the end of the shaft portion 117 , so that the nut 118 may be fastened. Therefore, even if the poppet spring 120 is elongated to restore the poppet 110 , the poppet 110 may not be easily removed from the plug 130 .

In the plug 130 , the other end of the poppet 110 may be selectively inserted and a plurality of through holes 132 and 133 may be formed in the body 131 in the axial direction.

Specifically, as shown in FIGS. 5 and 6 , the plug 130 has a guide 137 having a center hole 138 formed therein and sliding on the inner peripheral surface of the damper 140 , and one end of the guide on the outer peripheral surface. It may include a body portion 131 integrally formed and having a plurality of through holes 132 and 133 formed in the longitudinal direction.

The guide 137 is formed in a circular tube shape as a whole, and a center hole 138 into which the body part 112 of the poppet 110 is inserted and slid is formed therein. A step portion supporting the poppet spring 120 may be formed at one end of the inner circumferential surface of the center hole 138 . The poppet spring 120 may be supported on one side of the stepped portion, and the nut 118 may be supported on the other side of the stepped portion. The outer peripheral surface of the guide 137 may be inserted into the inner peripheral surface of the damper 140 to slide.

The body portion 131 is integrally formed on the outer peripheral surface of one end of the guide 137 . The inner circumferential surface of the body portion 131 constitutes the center hole 138 , and the outer diameter of the body portion 131 may be formed to be approximately twice larger than the outer diameter of the guide 137 . A plurality of through-holes 132 and 133 constituting the flow path may be formed in the body portion 131 in the longitudinal direction. The plurality of through holes 132 and 133 may be opened and closed by the damper 140 .

The plug 130 may further include a stepped portion 134 having a larger outer diameter than the body portion 131 in the connection portion between the body portion 131 and the guide 137 . A plurality of through holes 132 and 133 are also formed to extend inside the stepped portion 134 , and the rib portion 144 of the damper 140 is inserted into the side of the guide 137 side of the stepped portion 134 . A concave portion 135 (refer to FIG. 7 ) may be formed.

As shown in FIG. 6( a ), the plurality of through-holes of the plug 130 are arranged at a predetermined interval and formed in a circular shape, and a plurality of first holes 132 are arranged between the plurality of first holes and are arranged in two circles. It may include a plurality of second holes 133 penetrating each other in the form of a long hole connected to each other in the circumferential direction.

Since the first hole 132 is a simple circular hole, it can be easily drilled using a drill of a predetermined diameter. However, since the second hole 133 has a long hole shape with a curved side surface, it is difficult to process the second hole 133 such as to be precisely processed using an NC machine.

As shown in FIG. 6(b), the plurality of through-holes of the plug 130 are arranged at a predetermined interval and formed in a circular shape, and a plurality of first holes 132 are arranged between the plurality of first holes and are arranged in two circles. It may include a plurality of second holes 133 that are formed to overlap each other.

Since the second hole 133 in the embodiment of FIG. 6(b) is simply a form in which two parts of the circles overlap each other, the second hole 133 can be easily machined by drilling the circular through-hole twice in sequence. have.

As shown in FIG. 4 , the damper 140 includes a body portion 142 that is slidably inserted into the casing 160 and a plurality of through-holes ( It may include a rib portion 144 for opening and closing the 132 and 133, and a guide groove 143 formed inside the body portion 142 into which the plug 130 is slidably inserted.

The body portion 142 has a circular tube shape in which a guide groove 143 into which the guide 137 of the plug 130 is inserted is formed. One end of the body portion 142 is integrally formed with a rib portion 144 protruding outward in the radial direction, and the other end of the body portion 142 is blocked by an end closure portion 146 . One end of the outer circumferential surface of the rib part 144 may be formed as a tapered inclined surface to contact the concave part 135 of the plug 130 , thereby blocking the plurality of through-holes 132 and 133 .

7 is a conceptual diagram illustrating two embodiments of a shape of a plug guide, and FIG. 8 is a conceptual diagram illustrating three embodiments of a shape of a passage hole of a casing. In FIG. 7, a plurality of through-holes are omitted for convenience. In addition, in FIG. 8, the nut part integrally formed with the step part is omitted and illustrated.

As shown in FIG. 7( a ), the guide 137 of the plug 130 is simply formed in a circular cross-section, and is inserted into the guide groove 143 of the damper 140 having a circular inner circumferential cross-section to be slid. can At this time, a tolerance of about 0.5 mm may be formed between the outer peripheral surface of the guide 137 and the inner peripheral surface of the guide groove 143 for smooth sliding.

However, as shown, since the tolerance between the guide 137 and the guide groove 143 is large, as the plug 130 repeats the sliding operation within the damper 140, abrasion may occur, and in severe cases, it may stick to each other. There are concerns.

7( b ), the guide 137 of the plug 130 is formed to have a tolerance of 0 to 0.1 mm between the guide groove 143 of the damper 140 and the plug 130 . The guide 137 may further include a plurality of chamfers 139 formed on the outer circumferential surface.

In the embodiment of Figure 7 (b), the guide 137 may be formed with a pair of chamfered portions 139 in a planar shape facing each other on the outer circumferential surface. Since the contact area between the guide 137 and the guide groove 143 is reduced by the pair of chamfered portions 139, the tolerance between the guide 137 and the guide groove 143 is very 0 to 0.1 mm. can be made small. Since the contact area between the outer circumferential surface of the guide 137 and the inner circumferential surface of the guide groove 143 in the embodiment of FIG. Even if it is very small, the guide 137 can slide smoothly within the guide groove 143 .

On the other hand, as shown in FIG. 4, the casing 160 has a main body 161 in which a damper spring 150 is mounted and a central groove 162 into which the damper 140 is slidably inserted is formed. At one end of the part 161 , it may include a flow path part 163 formed thinner than the main body part and having flow path holes penetrated on the circumference.

The main body 161 is formed in the form of a circular tube having a central groove 162 therein, and threads are formed on the outer peripheral surface of the main body 161 , so that the casing 160 can be fastened to the manifold 10 . At one end of the main body 161, a flow passage 163 having a thickness thinner than that of the main body 161 is integrally formed, and the central groove 162 is blocked at the other end, and an outer diameter larger than that of the main body 161 is formed. The step portion 167 having a step may be integrally formed. In addition, a nut portion 168 in the form of a hexagonal column may be integrally formed on one side of the step portion 167 . The nut part 168 can be assembled or disassembled to the manifold 10 by turning the nut part 168 with a wrench from the outside of the manifold 10 .

As shown in FIG. 8( a ), a plurality of passage holes 164 in the form of circular through-holes on a circumference may be radially formed in the passage portion 163 of the casing 160 . For example, eight passage holes 164 may be formed at the same distance from each other.

As shown in FIG. 8B , two circular holes may communicate with each other in the flow path portion 163 of the casing 160 to form one flow path hole 164 . Compared with the embodiment of FIG. 8(a), the flow path hole 164 of FIG. 8(b) is formed so that the two flow path holes 164 of FIG. can be

In the case of FIG. 8(b), since the area of the flow path hole 164 is larger than that of the flow path hole of FIG. 8(a), the flow rate characteristic of the valve may be improved. On the other hand, since there are more portions in which the distance between the one end of the passage portion 163 and the passage hole 164 formed to have a smaller thickness than the body portion 161 and the passage hole 164 are increased, the strength of the portion is weak and may be deformed. there is a problem However, if the flow path portion 163 is formed to be thicker, the problem may be solved by reinforcing the weak strength portion.

As shown in FIG. 8(c) , a plurality of channel grooves 165 having a shape in which each channel hole is opened to an end edge of the casing 160 may be formed in the channel portion 163 of the casing 160 . have. Compared with the embodiment of Fig. 8 (a), the channel groove 165 of Fig. 8 (c) has the same width as the diameter of the channel hole 164 of Fig. 8 (a) up to the end of the casing 160 axially. It may be formed by cutting in the direction.

In the case of FIG. 8( c ), since the area of the flow path hole 164 is larger than that of the flow path hole of FIG. 8 ( a ), the flow rate characteristic of the valve may be improved. On the other hand, there may be a problem that the end edge of the casing 160 is weak. However, if the flow path portion 163 is formed to be thicker, the problem may be solved by reinforcing the weak strength portion.

In the above, an embodiment of the present invention has been described, but those of ordinary skill in the art can add, change, delete, or add components within the scope that does not depart from the spirit of the present invention described in the claims. Various modifications and changes of the present invention will be possible by this, and this will also be included within the scope of the present invention.

10: Manifold 12: 1st Euro
14: 2nd Euro 16: 3rd Euro
100: multi-function control valve
110: poppet 112: body part
113: chamfer 114: head
116: groove 117: shaft
118: nut
120: poppet spring
130: plug 131: body portion
132: Hall 1 133: Hall 2
134: step portion 135: concave portion
137: guide 138: central hall
139: chamfer
140: damper 142: body portion
143: guide groove 144: rib portion
146: end occlusion part
150: damper spring
160: casing 161: body portion
162: central groove 163: euro section
164: Euro Hall 165: Euro Home
167: step portion 168: nut portion

Claims (9)

a poppet having a head at one end of the body to open and close the flow path;
a plug in which the other end of the poppet is selectively inserted and a plurality of through-holes are formed in the body portion in an axial direction;
a poppet spring provided between the poppet and the plug to provide an elastic force to open the poppet;
a damper into which the plug is slidably inserted;
a casing into which the damper is slidably inserted; and
A multi-function control valve of a hydraulic motor comprising a damper spring provided between the damper and the casing to provide an elastic force to open the damper. According to claim 1,
The poppet is
A body part in the form of a cylinder,
a head integrally formed with an outer diameter greater than that of the body at one end of the body;
a shaft portion extending from the other end of the body portion;
The multi-function control valve of the hydraulic motor, characterized in that it comprises a nut fastened to the end of the shaft. 3. The method of claim 2,
the plug is
a guide having a center hole formed therein and sliding on the inner circumferential surface of the damper;
and a body part integrally formed on the outer peripheral surface of one end of the guide and having a plurality of through-holes formed in the longitudinal direction,
The center hole of the guide is formed to be stepped to support one end of the poppet spring and the nut. 4. The method of claim 3,
A plurality of through-holes of the plug
A plurality of first holes arranged at predetermined intervals and formed in a circle;
and a plurality of second holes arranged between the plurality of first holes and formed through two circles overlapping each other. 4. The method of claim 3,
The damper is
a body portion slidably inserted into the casing;
a rib portion integrally formed on an outer surface of one end of the body portion to open and close a plurality of through-holes of the plug;
The multi-function control valve of the hydraulic motor, characterized in that it is formed inside the body portion and comprises a guide groove into which the plug is slidably inserted. 6. The method of claim 5,
The guide of the plug is formed to have a tolerance of 0 to 0.1 mm between the guide groove of the damper,
The guide of the plug is a multi-function control valve of a hydraulic motor, characterized in that it further comprises a plurality of chamfers formed on the outer peripheral surface. According to claim 1,
The casing is
a main body in which the damper spring is mounted and a central groove into which the damper is slidably inserted;
The multi-function control valve of the hydraulic motor, characterized in that it comprises a flow path formed at one end of the body portion thinner than the body portion and through which the flow path holes are formed on the circumference. 8. The method of claim 7,
The multi-function control valve of the hydraulic motor, characterized in that the flow path portion of the casing is formed such that two circular holes are communicated with each other to constitute one flow hole. 8. The method of claim 7,
The passage portion of the casing
The multi-function control valve of a hydraulic motor, characterized in that each of the flow holes is formed with a plurality of flow channel grooves having a shape that is opened to the end edge of the casing.

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