KR200469567Y1

KR200469567Y1 - Valve apparatus for prevention from sagging of excavator Tongs

Info

Publication number: KR200469567Y1
Application number: KR2020130005857U
Authority: KR
Inventors: 황규관
Original assignee: 황규관
Priority date: 2013-07-15
Filing date: 2013-07-15
Publication date: 2013-10-23

Abstract

The present invention relates to an anti-sag valve device for an excavator.
The drooping prevention valve device of the excavator clamp of the present invention is formed in a hexahedral shape, the sole valve insertion groove 11 is formed on one side inward, the sole valve insertion groove ( A port insertion groove 12 is formed to communicate with 11), and B port insertion groove 13 is formed to communicate with the solenoid valve insertion groove 11 in parallel with the A port insertion groove 12, P port insertion groove 14 is formed so as to communicate with the solenoid valve insertion groove 11 in the opposite direction to the A port insertion groove 12, the sole valve insertion groove (parallel to the P port insertion groove 14) A body 10 having a T-port insertion groove 15 formed therein so as to communicate with 11); A solenoid valve for selectively opening and closing the B port insertion groove 13, A port insertion groove 12, P port insertion groove 14, and T port insertion groove 15 by inserting one side into the sole valve insertion groove of the body ( 20); A T port nipple (30) fastened to the T port insertion groove (15); A B port nipple (40) fastened to the B port insertion groove (13) and having an orifice member (19) having an orifice hole (19a) formed at the center thereof; P port nipple (50) is installed in the P port insertion groove (14), the opening and closing means for selectively moving or blocking the fluid only in the direction of the solenoid valve (20); It is installed in the A-port insertion groove 12, A port nipple 60 is provided therein opening and closing means for selectively moving or blocking the fluid only in the outward direction; is configured to include, the T port nipple 30, the B port nipple 40, the P port nipple 50, and the A port nipple 60 are characterized in that the lengths protruding outward from the body 10 are the same.
According to the present invention, it is possible to prevent the tongs from sagging or shaking when the tongs are not used together with the bucket on the excavator, and in particular, a solenoid valve is fastened to the center of the body, and several ports are connected to both sides thereof, but each port is fixed. By protruding by a distance it is possible to be connected smoothly without being interrupted in the process of connecting the hydraulic line without being interrupted to the connection of the hydraulic line.

Description

Valve apparatus for prevention from sagging of excavator Tongs}

The present invention relates to a deflection prevention valve device of an excavator tongs, and to prevent the tongs from sagging or shaking when the tongs installed with the bucket are not used, the solenoid valve is fastened to the center of the body, The two ports are connected but each port is projected by a certain distance so that the connection of the hydraulic line is not hindered in the process of connecting the hydraulic line, it is possible to be connected smoothly without interfering with each other in the excavator clamps .

An excavator is a kind of special vehicle that is equipped with a cap and a power unit on an unlimited orbit and can be operated on the ground and carry out the transportation work by piling up the gravel or the like of a predetermined area. The excavator is moved by the power transmitted from the power unit A work device for performing a predetermined job is constructed.

The working device is constructed so that a boom, an arm and a bucket, which are normally provided to be able to move jointly, can be moved by respective hydraulic cylinders, and hydraulic pressure from a hydraulic device is supplied to each cylinder through a hydraulic line.

In particular, it is possible to perform each operation according to the type and type of the bucket. For example, a working device having a polyp bucket can carry out loading and unloading of rock and wood, and a chromaxel bucket is adopted In the case of a work machine with a wood clamping device, wood is transported and loaded, while a worker with a strainer bucket carries out the processing of waste and house remodeling, It is possible to carry out scraper carrying light unloading work by a working device having a polyp clamp and slope surface excavation and soil pitting work by a working device having a loader bucket.

However, the above-described various types of working apparatuses can not simultaneously perform excavation work for puddling soil or re-collecting aggregate and wood carrying work.

That is, when performing the work according to the landscape construction, the above-mentioned excavation work and the timber transportation work must be performed in parallel. However, since the conventional work apparatus described above can not perform such an operation, There is a disadvantage that productivity is deteriorated due to a delay in working time due to replacement.

As a technique for solving such a problem, a bucket is provided on one side of an excavator boom and a tongue is provided on the other side of the excavator boom in a "work device for an excavator" (Korean Utility Model Utility Model No. 20-0201244, Patent Document 1) Are individually equipped with hydraulic cylinders so that individual adjustments can be made so that the bucket can be operated independently and the bucket and the clamp can be operated together.

In this structure, when the clamp is not used, only the bucket is used in a state in which the clamp is closely attached to the bucket by adjusting the hydraulic cylinder connected to the clamp.

However, when the bucket of the excavator is used solely, the oil pressure tightness of the hydraulic cylinder located on the side of the inner side of the boom is lowered and the gripper is sagged downward.

As a technique for solving such a problem, a "clamping device for an excavator" (Korean Unexamined Patent Application Publication No. 10-2011-0116866, Patent Document 2) discloses a clamping device for clamping a clamp and a clamp, Respectively.

However, if the tongs are used for a long time, even if the tongs are fixed by such fastening means, vibrations are generated in parts such as various pins provided at the connection point between the tongs and the boom due to deterioration of the airtightness, There is a problem that the tongs can not operate smoothly as a whole.

In order to solve this problem, Korean Patent Laid-Open No. 10-2013-0059725 and Patent Document 3 disclose a relief valve for mutually adjusting a hydraulic signal for rotating the bucket and a hydraulic signal for rotating the clamp And an example in which a check valve for preventing the hydraulic oil from dropping is disclosed.

However, the valve body for preventing the deflection of the excavator tiller still requires a simple solenoid valve, a body is prepared, a solenoid valve is inserted into the body, and a simple straight line hole, The check valve 7 and the nipple 6 are irregularly protruded to the outside of the body so that it is difficult to connect the hydraulic line to the check valve 7 Since the two nipples 7 are required for each one flow path such as the nipple 7 connected to the check valve 7 and the nipple 7 connected to the body, the assembling process is also very complicated, There was a problem that it increased.

KR 20-0201244 (Aug. 19, 2000) KR 10-2011-0116866 (October 26, 2011) KR 10-2013-0059725 (2013.06.07)

A sagging prevention valve device for an excavator of the present invention is intended to solve the problems caused by the conventional art as described above, and it is intended to prevent sagging or swaying of the pliers when the pug mounted on the excavator is not used.

In particular, a solenoid valve is fastened to the center of the body, and several ports are connected to both sides thereof so that each port protrudes by a predetermined distance so that the connection of the hydraulic lines is not disturbed and the hydraulic lines are not disturbed with each other. I want to be able to connect.

In addition, P and A ports have stoppers, seats, and poppets installed inside the holes without the need to install nipples at both ends of the check valves. To reduce, while minimizing the size of the component protruding out of the body to reduce the size is easily installed in tight spaces, it is easy to install the hydraulic line in each nipple without interference.

In addition, it is intended to facilitate the formation of the orifice hole by screwing the orifice provided with the orifice hole in the B port insertion groove.

In order to solve the above problems, the excavator clamp of the present invention is formed in a hexahedral shape, and the sole valve inserting groove 11 is formed on one side inward, and the other adjacent to the one side surface. A port insertion groove 12 is formed on the side so as to communicate with the sole valve insertion groove 11, B port insertion groove so as to communicate with the sole valve insertion groove 11 in parallel with the A port insertion groove (12). (13) is formed, and the P port insertion groove (14) is formed to communicate with the solenoid valve insertion groove (11) in a direction opposite to the A port insertion groove (12), and the P port insertion groove (14) A T port insertion groove 15 is formed to communicate with the sole valve insertion groove 11 in parallel with the B port insertion groove 13, the T port insertion groove 15, the A port insertion groove 12, Each of the P port insertion grooves 14 is formed with a first passage portion 16 having a constant diameter from the inside to the outside direction. The first expanding portion 17 having a larger diameter than the one passage portion 16 and the second expanding portion 18 having a larger diameter than the first expanding portion 17 are continuously formed in the outward direction, and the second expanded portion A thread is formed on the inner circumferential surface of the pipe portion 18, and a thread is formed on the inner circumferential surface of the first passage portion 16 of the B port insertion groove 13, and the first passage portion 16 of the B port insertion groove 13 is formed. The orifice member 19, which is engaged with the thread of the inner circumferential surface and has an orifice hole 19a formed in the center thereof, is screwed to the inner circumferential surface of the first passage portion 16. Between the first expansion unit 17 and the second expansion unit 18, an auxiliary expansion unit 17a having a larger diameter than the first expansion unit 17 and a smaller diameter than the second expansion unit 18 is formed. A body 10; A solenoid valve for selectively opening and closing the B port insertion groove 13, A port insertion groove 12, P port insertion groove 14, and T port insertion groove 15 by inserting one side into the sole valve insertion groove of the body ( 20); A passage is formed at the center in the longitudinal direction, and the outer diameter of one side corresponds to the inner circumferential surface of the second expansion portion 18 of the T-port insertion groove 15, and a thread is formed on the outer circumferential surface of the second expansion portion 18. T port nipple 30 is screwed into the (T), and inserted into the T port insertion groove 15; A passage is formed at the center in the longitudinal direction, the outer diameter of which corresponds to the inner circumferential surface of the second expansion portion 18 of the B-port insertion groove 13, and a thread is formed on the outer circumferential surface thereof so that the second expansion portion 18 is formed. A B port nipple (40) screwed into the B port and inserted into the B port insertion groove (13); It is installed in the P-port insertion groove 14, is formed in a cylindrical shape having a passage in the longitudinal direction in the center, the outer diameter corresponds to the inner diameter of the first expansion portion 17 of the P-port insertion groove 14 The first stopper 51 is inserted into the first expansion unit 17 and has a first stopper 51 having a first step 51a formed in the middle of the inner passage so as to increase an inner diameter from the inside to the outside, and the longitudinal direction at the center thereof. A passage is formed along the tip, and the tip portion is brought into close contact with the first stopper 51, and the outer diameter of the tip portion corresponds to the inner circumferential surface of the second expansion portion 18 of the P-port insertion groove 14, and the thread is formed on the outer circumferential surface thereof. And a first nipple body 52 having a second stepped portion 52a formed in the middle thereof so as to be screwed to the second expansion pipe 18, and to have a small inner diameter from the inner side to the outer side in the passage. 1 is installed inside the nipple body 52, one end of which is supported by the second step (52a), The passage is formed in the longitudinal direction in the hem, but the other end portion is provided in the first sheet 53 and the tapered portion 53a inclined toward the outer direction and the first nipple body 52. The end adjacent to the first stopper 51 is open, and the end adjacent to the first sheet 53 is blocked, but the inlet hole 54a is formed in the side wall, and the first sheet 53 The inclined portion 54b is formed to be inclined to coincide with the tapered portion 53a of the first sheet 53, and the third stepped portion 54c is formed therein, and the first nipple body ( 52) The first poppet 54 which is installed to be movable in the longitudinal direction from the inside, and both end portions of the first stepper 51a of the first stopper 51 and the third inside the first poppet 54; P-port nipple (50) consisting of a first spring (55) installed to be supported by the step (54c) to press the first poppet (54) in the outward direction .; It is installed in the A port insertion groove 12, is formed in a cylindrical shape having a passage in the longitudinal direction in the center, the inner end is supported by the end of the first expansion portion 17 of the A port insertion groove 12 The other end is provided in the second sheet 61 in which the tapered portion 61a inclined inwardly is formed, and inside the first expansion portion 17 of the A-port insertion groove 12, The outer end is open, the inner end is blocked, but the inlet hole 62a is formed in the side wall surface, and the end adjacent to the second sheet 61 is tapered portion 61a of the second sheet 61. The second inclined portion 62b is formed to be inclined with a fourth step 62c formed therein and is movable in the longitudinal direction within the first expansion portion 17. (62) and a passage is formed in the center in the longitudinal direction, the outer diameter of which is opposed to the auxiliary expansion portion (17a) of the A-port insertion groove (12). It is inserted into the auxiliary expansion tube (17a), one end is to be caught by the end of the secondary expansion tube (17a) of the A port insertion groove 12, the inner passage in the middle so that the inner diameter is reduced from the inner side to the outer direction A second stopper 63 having a fifth step 63a formed therein, and both ends thereof having a fifth step 63a of the second stopper 63 and a fourth stepped inside the second poppet 62. The second spring 64 is installed to be supported by 62c and presses the second poppet 62 in the outward direction, and a passage is formed along the longitudinal direction at the center thereof, and the front end thereof is formed in the second stopper 63. The outer diameter of the distal end portion corresponds to the inner circumferential surface of the second expansion portion 18 of the A-port insertion groove 12, and a thread is formed on the outer circumferential surface thereof so as to be screwed to the second expansion portion 18. It is configured to include; A port nipple (60) consisting of a nipple body (65).

At this time, the B port nipple 40, T port nipple 30, P port nipple 50 and A port nipple 60 is characterized in that the outer end is protruded by the same length from the outer peripheral surface of the body (10) do.

In addition, the excavator is connected to the bucket (2) and tongs (3) at the bottom of the boom (1), the outer cylinder device (4) and the inner cylinder device (5) on the outer surface and the inner surface of the boom 1, respectively The bucket 2 is connected to the outer cylinder device 4, the tongs 3 are connected to the inner cylinder device 5, the tongs 3 are rotated upward to the inner surface of the boom 1 The B port nipple 40 is connected to the cylinder body side of the inner cylinder device 5 by a hydraulic line, and the A port nipple 60 is a cylinder rod of the inner cylinder device 5. That is, the small port is connected to the hydraulic line side, the P port nipple 50 is connected to the external pump 70 and the hydraulic line, the T port nipple 30 is the external tank drain 80 and the hydraulic pressure It is characterized by being connected by a line.

In addition, the T port nipple 30, the B port nipple 40, the P port nipple 50, and the A port nipple 60 are formed with protrusions protruding in the hexagonal bolt shape in the middle of the outer circumferential surface thereof. O-ring insertion groove is formed, characterized in that the O-ring is inserted into the O-ring insertion groove.

Or, it is formed in a hexahedral shape, the sole valve insertion groove 11 is formed on one side inward, the A port insertion groove (to communicate with the sole valve insertion groove 11 on the other side adjacent to the one side ( 12) is formed, and the B port insertion groove 13 is formed to be in communication with the sole valve insertion groove 11 in parallel with the A port insertion groove 12, and is opposite to the A port insertion groove 12 The P port insertion groove 14 is formed to communicate with the solenoid valve insertion groove 11 in the direction, and the T port insertion groove so as to communicate with the solenoid valve insertion groove 11 in parallel with the P port insertion groove 14. A body 10 in which 15 is formed; A solenoid valve for selectively opening and closing the B port insertion groove 13, A port insertion groove 12, P port insertion groove 14, and T port insertion groove 15 by inserting one side into the sole valve insertion groove of the body ( 20); A T port nipple (30) fastened to the T port insertion groove (15); A B port nipple (40) fastened to the B port insertion groove (13) and having an orifice member (19) having an orifice hole (19a) formed at the center thereof; P port nipple (50) is installed in the P port insertion groove (14), the opening and closing means for selectively moving or blocking the fluid only in the direction of the solenoid valve (20); It is installed in the A-port insertion groove 12, A port nipple 60 is provided therein opening and closing means for selectively moving or blocking the fluid only in the outward direction; is configured to include, the T port nipple 30, the B port nipple 40, the P port nipple 50, and the A port nipple 60 are characterized in that the lengths protruding outward from the body 10 are the same.

According to the present invention, it is possible to prevent the pliers from sagging or shaking when the pliers mounted on the excavator together with the bucket are not used.

In particular, a solenoid valve is fastened to the center of the body, and several ports are connected to both sides thereof so that each port protrudes by a predetermined distance so that the connection of the hydraulic lines is not disturbed and the hydraulic lines are not disturbed with each other. Can be connected.

In addition, P and A ports have stoppers, seats, and poppets installed inside the holes without the need to install nipples at both ends of the check valves. Reducing, while minimizing the size of the component protruding out of the body to reduce the size is easily installed in tight spaces, it is possible to easily install the hydraulic line in each nipple without interference.

In addition, the orifice hole can be easily formed by screwing an orifice having an orifice hole in the B-port insertion groove.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic plan view of a valve device according to an embodiment of the present invention. Fig.
2 is an exploded cross-sectional view showing a valve-preventing valve device of an excavator of the present invention.
3 is a cross-sectional view showing a valve preventing device of an excavator of the present invention.
4 is a hydraulic circuit diagram showing a sag preventing valve device of an excavator of the present invention.
Fig. 5 is a plan view, a front view, a rear view, and a right side view of the anti-sagging valve device of the excavator of the present invention. Fig.
6 is a block diagram showing an example of the installation of an anti-sag valve device of an excavator of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a deflection preventing valve device for an excavator of the present invention will be described in detail with reference to the accompanying drawings.

The drooping prevention valve device of the excavator clamp of the present invention is largely the body 10, solenoid valve 20, T port nipple 30, B port nipple 40, P port nipple 50, A port nipple 60 Consists of

6, the bucket 2 and the tongue 3 are connected to the lower end of the boom 1, and the outer surface of the boom 1 and the inner surface of the boom 1 are connected to each other. The bucket 2 is connected to the outer cylinder device 4 and the tongue 3 is connected to the inner cylinder device 5 and the inner cylinder device 5 is connected to the inner cylinder device 4, And the tongue 3 is brought into contact with or in close proximity to the inner surface of the boom 1 by upward rotation.

At this time, the B port nipple 40 is connected to the cylinder body side of the inner cylinder device 5 by a hydraulic line, and the A port nipple 60 is located on the cylinder rod of the inner cylinder device 5, that is, the small chamber side. It is connected to the hydraulic line, the P port nipple 50 is connected to the external pump 70 and the hydraulic line, the T port nipple 30 is connected to the external tank drain 80 and the hydraulic line.

As shown in FIG. 2, the body 10, which is a component of the present invention, has a metal hexahedron shape.

The sole valve insertion groove 11 is formed on one side, specifically, on the right side of the drawing, so that the solenoid valve 20 to be described later is fastened.

The A port insertion groove 12 is formed on the other side adjacent to the one side and one side, specifically, the upper side in the drawing so as to be in communication with the sole valve insertion groove 11, and the A port insertion groove 12 A B port insertion groove 13 is formed to communicate with the sole valve insertion groove 11 in parallel.

In addition, the P port insertion groove 14 is formed to communicate with the solenoid valve insertion groove 11 in a direction opposite to the A port insertion groove 12, and the sole valve insertion groove is parallel to the P port insertion groove 14. The T-port insertion groove 15 is formed to communicate with the groove 11.

In this case, the B port insertion groove 13, the T port insertion groove 15, the A port insertion groove 12, and the P port insertion groove 14 are respectively formed with a first passage part having a constant diameter in the outward direction ( 16 is formed and the first expansion part 17 having a larger diameter than the first passage part 16 and the second expansion part 18 having a larger diameter than the first expansion part 17 are continuous in the outward direction. It is formed.

In addition, a screw thread is formed on the inner circumferential surface of the second expansion pipe 18.

At this time, a screw thread is formed on the inner circumferential surface of the first passage portion 16 of the B-port insertion groove 13.

In the first passage portion 16 of the B-port insertion groove 13, an orifice member 19 having an orifice hole 19a formed in the center while being engaged with the screw thread is screwed to the inner circumferential surface of the first passage portion 16. Are combined.

In addition, the A-port insertion groove 12 has a diameter larger than that of the first expansion unit 17 between the first expansion unit 17 and the second expansion unit 18, and is larger than the second expansion unit 18. This small auxiliary expanding portion 17a is formed.

The solenoid valve 20, which is a component of the present invention, has one side inserted into the sole valve insertion groove 11 of the body 10 so that the B port insertion groove 13, A port insertion groove 12, and P port insertion groove 14 are provided. ), It is configured to selectively open and close the T-port insertion groove (15).

The solenoid valve 20 is operated by receiving power, and the operation of the solenoid valve 20 selectively opens and closes the respective insertion grooves according to the operation of a switch or the like.

The T port nipple 30, which is a component of the present invention, is inserted and installed in the T port insertion groove 15 as shown in the drawing, and a passage is formed along the longitudinal direction in the center so that the fluid can be moved. .

In addition, the outer diameter of one side corresponds to the inner peripheral surface of the second expansion portion 18 of the T-port insertion groove 15, and a thread is formed on the outer circumferential surface of the second expansion portion 18 of the T-port insertion groove 15. Screwed together.

The B port nipple 40, which is a component of the present invention, is also inserted into the B port insertion groove 13 as shown in the drawing, and a passage is formed along the longitudinal direction in the center, and is configured to enable the movement of the fluid. .

In addition, the outer diameter of one side corresponds to the inner circumferential surface of the second expansion portion 18 of the B port insertion groove 13, and a thread is formed on the outer circumferential surface of the second expansion portion 18 of the B port insertion groove 13. Screwed together.

At this time, as described above, the orifice member 19 in which the orifice hole 19a is formed at the center while being engaged with the screw thread is formed in the first passage portion 16 of the B-port insertion groove 13. 16) Although screwed to the inner circumferential surface, the orifice member 19 is installed in the first passage portion 16 of the B-port insertion groove 13 while the orifice member 19 is formed separately from the nipple. It is made to be easy.

P port nipple 50, which is a component of the present invention, is composed of a first stopper 51, a first nipple body 52, a first sheet 53, a first poppet 54, and a first spring 55. When the pressure of the fluid moving toward the inside of the body 10 from the outside of the P-port insertion groove 14 is received, the fluid flows through the inner direction while the first poppet 54 moves inward. It is made to block the P port insertion groove 14 when the pressure is released.

The first stopper 51 is installed in the P-port insertion groove 14 as shown in FIG. 2, and is formed in a cylindrical shape having a passage formed in the longitudinal direction at the center thereof.

The outer diameter of the first stopper 51 corresponds to the inner diameter of the first expansion portion 17 of the P-port insertion groove 14 and is fitted into the first expansion portion 17 of the P-port insertion groove 14. The first step 51a is formed in the middle of the inner passage so as to increase the inner diameter from the inner side to the outer side.

The first nipple body 52 also has a passage formed in the center in the longitudinal direction, but the front end portion is in close contact with the first stopper 51.

In addition, the outer diameter of the distal end portion of the first nipple body 52 corresponds to the inner circumferential surface of the second expansion portion 18 of the P port insertion groove 14, and a thread is formed on the outer circumferential surface thereof, so that the first port of the P port insertion groove 14 is formed. 2 screwed into the expansion unit (18).

In addition, the second stepped portion 52a is formed in the middle of the passage of the first nipple body 52 so as to have an inner diameter smaller from the inner side to the outer side.

The first sheet 53 also has a passage formed in the center in the longitudinal direction, is installed in the first nipple body 52, one end is supported by the second step (52a), the other end is outward It is characterized in that the tapered portion 53a which is inclined toward is formed.

The first poppet 54 is installed in the inner passage of the first nipple body 52 as shown, but the end adjacent to the first stopper 51 is open and the end adjacent to the first sheet 53 is opened. Takes a blocked shape.

In addition, an inlet hole 54a is formed in the sidewall surface of the first poppet 54 to allow fluid to flow therein, and an end portion adjacent to the first sheet 53 is formed in a tapered portion of the first sheet 53. Inclined inclined portion 54b is formed to coincide with 53a).

In addition, a third step 54c is formed inside the first poppet 54, and is installed in the first nipple body 52 so as to be movable in the longitudinal direction.

The first spring 55 is installed such that both ends thereof are supported by the first step 51a of the first stopper 51 and the third step 54c inside the first poppet 54. One poppet 54 is configured to press outward.

The P-port nipple 50 of this configuration pushes the first poppet 54 toward the first nipple body 52 when the pressure is lowered or released by the restoring force of the first spring 55 and the inclined portion 54b. When the tapered portion 53a is in close contact to block the movement of the fluid and the fluid is applied with pressure toward the inside of the body 10, the first poppet 54 is pushed toward the inside of the body 10 while the inclined portion 54b is pressed. Between the taper portion 53a and fluid flows into the inner space of the first poppet 54 through the inlet hole 54a, and then inside the P port insertion groove 14 and the body 10 along the passage. Is moved to the solenoid valve 20 side.

The A port nipple 60 of the present invention is composed of a second sheet 61, a second poppet 62, a second stopper 63, a second spring 64 and a second nipple body 65. 10 is opened and closed according to the pressure of the fluid to the outside through the A port insertion groove 12 from the inside to open and close the A port insertion groove 12.

As shown in the figure, the second sheet 61 is installed in the A-port insertion groove 12 and is formed in a cylindrical shape in which a passage is formed in the longitudinal direction at the center thereof.

As for the 2nd seat 61, the inner end part is caught by the edge part of the 1st expansion part 17 of the A-port insertion groove 12, and the other end part is provided with the taper part 61a which inclined toward the inner direction.

The second poppet 62 is installed inside the first expansion portion 17 of the A-port insertion groove 12. The second poppet 62 has a difference compared to that of the poppet installed inside the nipple body.

Similarly to the first poppet 54, the shape of the second poppet 62 is open at the outer end and the inner end is blocked, but the inlet hole 62a is formed at the side wall, and the second sheet 61 is formed. The inclined portion 62b is formed to be inclined to coincide with the tapered portion 61a of the second sheet 61, the fourth stepped portion 62c is formed therein, and the first expanded portion (17) It is provided so that a movement in the longitudinal direction from inside is possible.

The second stopper 63 has a passage formed in the center in the longitudinal direction as shown in the drawing, and the outer diameter thereof is inserted into the auxiliary expander 17a corresponding to the auxiliary expander 17a of the A-port insertion groove 12. One end thereof is caught by an end portion of the auxiliary expansion pipe 17a of the A-port insertion groove 12, and a fifth step 63a is formed in the middle of the inner passage so as to reduce the inner diameter from the inner side to the outer side. .

The second spring 64 is installed so that both ends thereof are supported by the fifth step 63a of the second stopper 63 and the fourth step 62c inside the second poppet 62. 62) to press outward.

The second nipple body 65 has a passage formed in the center thereof in the longitudinal direction, and the front end portion is brought into close contact with the second stopper 63, and the outer diameter of the front end portion is the second expansion portion of the A port insertion groove 12. (18) Corresponding to the inner circumferential surface, the thread is formed on the outer circumferential surface is made to be screwed to the second expansion portion (18).

The A port nipple 60 of this configuration is opened between the tapered portion 61a and the inclined portion 62b while the second poppet 62 moves upward when the body 10 receives the pressure of the fluid toward the outside. After being introduced through the gap, it is moved to the external hydraulic line through the second nipple body 65 along the passage moved into the second poppet 62 through the inlet hole 62a.

On the contrary, when the pressure is released, the taper portion 61a and the inclined portion 62b are in close contact with each other while moving by the restoring force of the second spring 64 to block the movement of the fluid.

Looking at Figure 3, it can be seen that the length of each nipple protruding out of the body 10 are all the same.

Particularly, as shown in the drawing, the tip portion of the solenoid valve 20 inserted into the body 10 is formed to have a smaller outer diameter, and an A port is inserted into which the fluid moves from the inside to the outside. Since the second sheet 61, the second poppet 62, the second stopper 63, and the second spring 64 are installed in the auxiliary expanding part 17a and the first expanding part 17 of the groove 12. It is easier to implement.

More specifically, the configuration of the check valve method is the same for both the A port side and the P port side, but in the case of the P port side installed in a direction in which fluid flows from the outside into the first seat 53 and the first The poppet 54 and the first spring 55 are installed in the first nipple body 52, and the first stopper 51 is installed in the first expansion portion 16 of the P-port insertion groove 14. In the case of the A port side in which the passage length to the tip of the beaker body 10 is relatively short, and is installed in the direction in which the fluid is discharged from the inside to the outside, the second sheet 61, the second poppet 62, The second stopper 63 and the second spring 64 are installed in the auxiliary expansion part 17a and the first expansion part 17 of the A-port insertion groove 12 to be different from the P port side in a relatively long installation space. Bars are installed in position, so that the nipples projecting out of the body 10 have the same protruding length as a whole.

That is, the B port nipple 40, T port nipple 30, P port nipple 50 and A port nipple 60 is characterized in that the outer end is protruded by the same length from the outer peripheral surface of the body 10 It is.

On the other hand, in the above configuration, the T port nipple 30, B port nipple 40, P port nipple 50, A port nipple 60 as shown in FIG. Protruding portion 41 is formed to protrude, the lower portion of the protrusion is formed with an O-ring insertion groove 42, the O-ring 90 is inserted into the O-ring insertion groove 42.

2 shows an example in which the O-ring inserting groove 42 and the O-ring 90 are installed on the B port side, which are all installed in the same port.

Protruding portion 41 serves to facilitate the coupling, separation of the nipple through a spanner or the like.

As illustrated in the hydraulic circuit diagram of FIG. 4 and FIG. 6, A, B, P, and T ports are provided on both sides of the body, respectively, and the solenoid inside the body. It takes the form in which the valve 20 is inserted.

Looking at the operating state for the sag prevention, the solenoid valve 20 opens the flow path from the P port to the A port, the pump 70 is operated by the fluid is introduced into the P port nipple 50 from the outside.

At this time, the inside of the P port nipple 50 has a structure that is opened when the fluid is pressured toward the solenoid valve 20 located inside the bar fluid passes through the P port nipple 50, the solenoid valve 20 After passing through, it is moved to the A port nipple (60).

In addition, the A port nipple 60 has a structure that is opened by the pressure of the fluid toward the outside in the solenoid valve 20, the A port nipple 60 is also opened, the fluid is the inner cylinder device (5) along the hydraulic line Hydraulic pressure is applied to the cylinder rod, i.e., the small-capacity chamber side of the chopper, and the tongs 3 are rotated upward to maintain a close contact with the boom 1.

In this state, both the A port and the P port are configured to prevent the reverse movement of the fluid, thereby preventing sagging when the tongs are rotated upward to the boom side.

In this case, when the tongs are rotated downward, the tongs are rotated downward by the pressure of a pump (not shown) connected to the inner cylinder device 5, in this case, the hydraulic line connected to the B port nipple 40. In the case of blocking or opening by the solenoid valve 20, the high pressure is not acted from the B port to the P port side by the orifice member 19 installed therein.

1: Boom 2: Bucket
3: forceps 4: outer cylinder device
5: Inner cylinder device 6: Nipple
7: check valve 10: body
11: Sol valve insert groove 12: A port insert groove
13: B port insertion groove 14: P port insertion groove
15: T port insertion groove 16: the first passage portion
17: first expansion unit 18: second expansion unit
19: orifice member 19a: orifice hole
20: solenoid valve 30: T port nipple
40: B port nipple 41: protrusion
42: O-ring insert groove 50: P port nipple
51: first stopper 51a: first step
52: first nipple body 52a: second step
53: first sheet 53a: tapered portion
54: first poppet 54a: inlet hole
54b: slope 54c: third step
55: first spring 60: A port nipple
61: second sheet 61a: tapered portion
62: second poppet 62a: inlet hole
62b: slope 62c: fourth step
63: second stopper 63a: fifth step
64: second spring 65: second nipple body
70: pump 80: tank drain
90: O-ring

Claims

In the deflection preventing valve device of the excavator gripper (3)
Is formed in a hexahedral shape, the sole valve insertion groove 11 is formed on one side inward, A port insertion groove 12 so as to communicate with the sole valve insertion groove 11 on the other side adjacent to the one side. Is formed, and the B port insertion groove 13 is formed to be in communication with the sole valve insertion groove 11 in parallel with the A port insertion groove 12, and in the opposite direction to the A port insertion groove 12 The P port insertion groove 14 is formed to communicate with the sole valve insertion groove 11, and the T port insertion groove 15 is in communication with the sole valve insertion groove 11 in parallel with the P port insertion groove 14. Is formed,
The B port insertion groove 13, the T port insertion groove 15, the A port insertion groove 12, and the P port insertion groove 14 each have a first passage portion 16 having a constant diameter from the inside to the outside direction. Is formed, and the first expansion part 17 having a larger diameter than the first passage part 16 and the second expansion part 18 having a larger diameter than the first expansion part 17 are continuously formed in the outward direction. A thread is formed on the inner circumferential surface of the second expansion pipe 18, and a thread is formed on the inner circumferential surface of the first passage portion 16 of the B port insertion groove 13, and the B port insertion groove 13 is formed. The orifice member 19 which is engaged with the thread of the inner circumferential surface of the first passage portion 16 of the first passage portion 16 is screwed to the inner circumferential surface of the first passage portion 16. The insertion groove 12 has a larger diameter than the first expansion unit 17 and a smaller diameter than the second expansion unit 18 between the first expansion unit 17 and the second expansion unit 18. 17a formed And the control body 10 in which;
A solenoid valve for selectively opening and closing the B port insertion groove 13, A port insertion groove 12, P port insertion groove 14, and T port insertion groove 15 by inserting one side into the sole valve insertion groove of the body ( 20);
A passage is formed at the center in the longitudinal direction, and the outer diameter of one side corresponds to the inner circumferential surface of the second expansion portion 18 of the T-port insertion groove 15, and a thread is formed on the outer circumferential surface of the second expansion portion 18. T port nipple 30 is screwed into the (T), and inserted into the T port insertion groove 15;
A passage is formed at the center in the longitudinal direction, the outer diameter of which corresponds to the inner circumferential surface of the second expansion portion 18 of the B-port insertion groove 13, and a thread is formed on the outer circumferential surface thereof so that the second expansion portion 18 is formed. A B port nipple (40) screwed into the B port and inserted into the B port insertion groove (13);
It is installed in the P-port insertion groove 14, is formed in a cylindrical shape having a passage in the longitudinal direction in the center, the outer diameter corresponds to the inner diameter of the first expansion portion 17 of the P-port insertion groove 14 The first stopper 51 is inserted into the first expansion unit 17 and has a first stopper 51 having a first step 51a formed in the middle of the inner passage so as to increase an inner diameter from the inside to the outside, and the longitudinal direction at the center thereof. A passage is formed along the tip, and the tip portion is brought into close contact with the first stopper 51, and the outer diameter of the tip portion corresponds to the inner circumferential surface of the second expansion portion 18 of the P-port insertion groove 14, and the thread is formed on the outer circumferential surface thereof. And a first nipple body 52 having a second stepped portion 52a formed in the middle thereof so as to be screwed to the second expansion pipe 18, and to have a small inner diameter from the inner side to the outer side in the passage. 1 is installed inside the nipple body 52, one end of which is supported by the second step (52a), The passage is formed in the longitudinal direction in the hem, but the other end portion is provided in the first sheet 53 and the tapered portion 53a inclined toward the outer direction and the first nipple body 52. The end adjacent to the first stopper 51 is open, and the end adjacent to the first sheet 53 is blocked, but the inlet hole 54a is formed in the side wall, and the first sheet 53 The inclined portion 54b is formed to be inclined to coincide with the tapered portion 53a of the first sheet 53, and the third stepped portion 54c is formed therein, and the first nipple body ( 52) The first poppet 54 which is installed to be movable in the longitudinal direction from the inside, and both end portions of the first stepper 51a of the first stopper 51 and the third inside the first poppet 54; P-port nipple (50) consisting of a first spring (55) installed to be supported by the step (54c) to press the first poppet (54) in the outward direction .;
It is installed in the A port insertion groove 12, is formed in a cylindrical shape having a passage in the longitudinal direction in the center, the inner end is supported by the end of the first expansion portion 17 of the A port insertion groove 12 The other end is provided in the second sheet 61 in which the tapered portion 61a inclined inwardly is formed, and inside the first expansion portion 17 of the A-port insertion groove 12, The outer end is open, the inner end is blocked, but the inlet hole 62a is formed in the side wall surface, and the end adjacent to the second sheet 61 is tapered portion 61a of the second sheet 61. The second inclined portion 62b is formed to be inclined with a fourth step 62c formed therein and is movable in the longitudinal direction within the first expansion portion 17. (62) and a passage is formed in the center in the longitudinal direction, the outer diameter of which is opposed to the auxiliary expansion portion (17a) of the A port insertion groove (12). It is inserted into the auxiliary expansion tube (17a), one end is to be caught by the end of the secondary expansion tube (17a) of the A port insertion groove 12, the inner passage in the middle so that the inner diameter is reduced from the inner side to the outer direction A second stopper 63 having a fifth step 63a formed therein, and both ends thereof having a fifth step 63a of the second stopper 63 and a fourth stepped inside the second poppet 62. The second spring 64 is installed to be supported by 62c and presses the second poppet 62 in the outward direction, and a passage is formed along the longitudinal direction at the center thereof, and the front end thereof is formed in the second stopper 63. The outer diameter of the distal end portion corresponds to the inner circumferential surface of the second expansion portion 18 of the A-port insertion groove 12, and a thread is formed on the outer circumferential surface thereof so as to be screwed to the second expansion portion 18. A port nipple (60) consisting of a nipple body (65); is configured to include,
The B port nipple 40 is connected to the cylinder body side of the inner cylinder device 5 by a hydraulic line, the A port nipple 60 is connected to the cylinder rod side of the inner cylinder device 5 by a hydraulic line, The P port nipple 50 is connected to the external pump 70 and the hydraulic line, the T port nipple 30 is characterized in that it is connected to the external tank drain 80 and the hydraulic line,
Anti-sag valve of excavator.

The method of claim 1,
The B port nipple 40, T port nipple 30, P port nipple 50 and A port nipple 60 is characterized in that the outer end is projected by the same length from the outer peripheral surface of the body 10,
Anti-sag valve of excavator.

3. The method according to any one of claims 1 to 2,
The excavator is connected to a bucket 2 and a tongs 3 at the lower end of the boom 1 and has an outer cylinder device 4 and an inner cylinder device 5 provided on the outer side surface and the inner side surface of the boom 1, And the bucket 2 is connected to the outer cylinder device 4 and the clamp 3 is connected to the inner cylinder device 5 so that the clamp 3 is rotated upwardly, Or close to,
The B port nipple 40 is connected to the cylinder body side of the inner cylinder device 5 by a hydraulic line, the A port nipple 60 is connected to the cylinder rod side of the inner cylinder device 5 by a hydraulic line, The P port nipple 50 is connected to the external pump 70 and the hydraulic line, the T port nipple 30 is characterized in that connected to the external tank drain 80 and the hydraulic line,
Anti-sag valve of excavator.

The method of claim 3, wherein
The T port nipple 30, the B port nipple 40, the P port nipple 50, and the A port nipple 60 have protrusions protruding in the hexagonal bolt shape at the middle of the outer circumferential surface thereof.
An O-ring insertion groove is formed in a lower portion of the protrusion,
Wherein an O-ring is inserted into the O-ring insertion groove.
Anti-sag valve of excavator.

In the deflection preventing valve device of the excavator gripper (3)
Is formed in a hexahedral shape, the sole valve insertion groove 11 is formed on one side inward, A port insertion groove 12 so as to communicate with the sole valve insertion groove 11 on the other side adjacent to the one side. Is formed, and the B port insertion groove 13 is formed to be in communication with the sole valve insertion groove 11 in parallel with the A port insertion groove 12, and in the opposite direction to the A port insertion groove 12 The P port insertion groove 14 is formed to communicate with the sole valve insertion groove 11, and the T port insertion groove 15 is in communication with the sole valve insertion groove 11 in parallel with the P port insertion groove 14. The body 10 is formed;
A solenoid valve for selectively opening and closing the B port insertion groove 13, A port insertion groove 12, P port insertion groove 14, and T port insertion groove 15 by inserting one side into the sole valve insertion groove of the body ( 20);
A T port nipple (30) fastened to the T port insertion groove (15);
A B port nipple (40) fastened to the B port insertion groove (13) and having an orifice member (19) having an orifice hole (19a) formed at the center thereof;
P port nipple (50) is installed in the P port insertion groove (14), the opening and closing means for selectively moving or blocking the fluid only in the direction of the solenoid valve (20);
A port nipple (60) is installed in the A port insertion groove 12, the opening and closing means for selectively moving or blocking the fluid only in the outward direction is installed therein;
The T port nipple 30, B port nipple 40, P port nipple 50, A port nipple 60 is characterized in that the same length protruding to the outside of the body 10,
Anti-sag valve of excavator.