KR200186297Y1 - Pressure oil cylinder - Google Patents

Abstract

The present invention has been devised in consideration of the disadvantages of the conventional hydraulic or pneumatic cylinder, and provides a hydraulic cylinder capable of fast speed operation, which is free from braking, simple structure, and advantages of pneumatic cylinder, as well as the forward and backward direction change of the rod during stroke. will be.

Its configuration is to install the cylinder 60 in the body 10, and in the upper portion of the body to switch the movement direction of the pumped fluid in accordance with the rotation direction of the gear pump 30 (30 ') rotated by a motor The pressurizing valve 40 and the first and second check valves 50 and 50 'are formed in the valve chamber 12, and the first check valve has a rear end inlet 61 and a second check of the cylinder. The valve is connected to the outlet 62 of the front end side, respectively, and in the lower portion of the body there is a fluid receiving chamber 13 connected to the valve chamber by vertical first and second fluid passages 14 and 14 '. And a shutoff valve 70 for blocking the first and second fluid passages from being connected to each other through the fluid receiving chamber.

Description

Hydraulic cylinder

The present invention relates to a hydraulic cylinder, and more particularly to a hydraulic cylinder that combines the advantages of a high speed operation, switching control of the rod forward and backward direction, and the pneumatic cylinder to facilitate braking during operation.

In general, hydraulic cylinders or pneumatic cylinders are widely used in the industrial field. Hydraulic cylinders are difficult to brake during stroke, and a separate directional control valve is required to switch the rod forward and backward. There are disadvantages such as the hassle and slowness of using a separate check valve to prevent hydraulic backflow.

In addition, the pneumatic cylinder requires an air compressor and a hose pipe, and there is a difficulty in use due to freezing in winter, and there are disadvantages such as a large force cannot be obtained due to the limitation of pneumatic pressure.

In addition, the hydraulic and pneumatic cylinders used double and triple valves and safety devices for the control of the stroke, and also required a separate fluid tank or air compressor, as well as the piping of the fluid or pneumatic hose according to their use Each of them has a disadvantage such as complicated structure, high parts and manufacturing labor, and high manufacturing cost.

The present invention has been devised in view of the disadvantages of the conventional hydraulic or pneumatic cylinder as described above, and aims to provide a hydraulic cylinder that is free of braking and simple in structure as well as reversing direction of the rod during stroke.

Another object of the present invention is to provide a hydraulic cylinder which enables high speed operation, which is an advantage of a pneumatic cylinder.

The above objects of the present invention are achieved by integrating a cylinder and its driver and at the same time eliminating the use of a fluid tank, and providing a hydraulic cylinder in which the control and braking of the movement direction of the fluid is precisely and quickly performed.

1 is a side view of a part of the present invention hydraulic cylinder incision,

2 is a rear view of a portion of the copper incision;

3 is a partial incision rear view showing the same operating state,

4 is an enlarged rear view of a part of FIG. 3;

<Description of the code | symbol about the principal part of drawing>

10; Body 11; Pump room,

12; Valve chamber 13; Fluid Reservoir,

14,14 .; First and second fluid passages, 15,15 '; 1st and 2nd channel,

20; Motor 21; shaft,

30,30 '; Gear pump, 40; Pressure Stool,

41,41 '; Pressing pin, 50,50 '; 1st and 2nd check valve,

51,51 '; Valve bodies 52,52 '; Checkball,

53,53 '; Spring, 54,54 '; Cap Screw,

511,511 '; Inlet hole, 512,512 '; Outlet,

60; Cylinder 61; Inlet,

62; Outlet, 70; Shut-off valve,

71,71 '; Braking rod, 80; Exhaust valve,

81; Valve chamber, 82; Aperture,

83; Exhaust passageway 84; Ball Valve,

85; Spring, 86; Cap Screw,

90,90 '; Pressure regulating valves, 91,91 '; Valve Room,

92,92 '; Vent holes, 93,93 '; Recovery passage,

94,94 '; Open / close valve, 95,95 '; spring,

96,96 '; Cap screw, 131; Sealing cap.

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention in detail as follows.

Reference numeral 10 denotes a driver body, and a motor 20 is mounted on a front surface thereof, and the shaft 21 of the motor penetrates horizontally from the front surface of the body to the upper side of the pump chamber 11 formed on the rear surface. It is coupled to the shaft hole, the open rear of the pump chamber is sealed with a cover 111.

In the upper and lower sides of the pump chamber, gear pumps 30 and 30 'are fixedly engaged with each other and rotated, and the shaft 31 of the upper gear pump 30 is connected to the shaft of the motor.

Therefore, since the gear pump 30 is rotated when the motor 20 is driven, the gear pump 30 'engaged with it is rotated together to pump the fluid.

In the upper portion of the body, the valve chamber 12 is formed to penetrate from side to side, and in the lower portion, the fluid receiving chamber 13 is formed so that only one side end is opened to one side.

In the middle of the valve chamber, pressurizing valves 40 each having pressure pins 41 and 41 'protruding from each other are mounted to move left and right, and first and second check valves at both ends of the valve chamber. 50 and 50 'are mounted.

Each of the first and second check valves has inlet holes 511 and 511 'formed at the front end of the inner end thereof, and outlet holes 512 and 512' formed at the upper end side of the inner end thereof. Pipe bodies 51 and 51 ', check balls 52 and 52' built in the pipes to open and close the inflow and outflow holes, and the valve pipes to allow the balls to be shot to the inflow hole side. And springs 53 and 53 'to be mounted, and cap screws 54 and 54' fastened to both outer ends of the valve chamber 12 so as to seal each open rear end of the valve bodies.

The first and second fluid passages 14 and 14 'are provided at both sides between the bottom surface of the valve chamber 12 and the top surface of the fluid receiving chamber 13, respectively, and the upper ends of the valve bodies 51 and 51' are respectively positioned at upper ends of the valve chambers 12 and 14 '. The valve chamber and the fluid receiving chamber are connected to each other through these fluid passages by vertically penetrating and positioned to be slightly inward of the inner end.

In addition, the first and second flow passages 15 and 15 'are horizontally formed between the rear surfaces of the first and second fluid passages 14 and 14' from the middle of the front surface of both sides of the pump chamber 11, These flow passages connect the middle two sides of the pump chamber and the first and second fluid passages to each other.

In addition, the outlet holes 512 and 512 ′ of the valve pipes are formed through the first and second passages 16 connected to each other in the upper plate 10 ′ mounted on the upper and upper ends of the body 10, respectively. 16 '), the outer end of the first passage 16 is connected to the rear end inlet 61 of the cylinder 60 which is installed on the upper surface of the upper plate body by a pipe, the second passage 16' The outer end of the cylinder is connected to the front end side outlet 62 of the cylinder by the pipe.

On the other hand, in the fluid receiving chamber, the braking rods 71, 71 'in the center of both sides do not exceed the lower end of the first and second fluid passages 14, 14' extending the shutoff valve 70 to a predetermined length. By mounting the reciprocating movement within the interval range not to partition the inside of the receiving chamber so as not to communicate with all the fluid passages, the fluid pump 30 and 30 ′ is rotated so that the fluid when the pumping is carried out the chamber and the first It is prevented that only the second fluid passage and the pump chamber and the first and second flow passages are circulated, so that the fluid is smoothly supplied to the cylinder 60 side.

Then, a sealing cap 131 is fastened to one open end of the fluid storage chamber, and when the air flows into the fluid filled in the fluid storage chamber 13, the air is automatically exhausted to the outside by its own air pressure. The exhaust valve 80 which makes it possible to install is provided.

The exhaust valve includes a valve chamber 81 having an outer end opened to the sealing cap, a through-hole 82 formed in the center of the inner end of the valve chamber so as to communicate with the fluid receiving chamber 13, and an inner upper surface of the valve chamber. Exhaust passage 83 formed to penetrate through the outer surface of the sealing cap in the air, a ball valve 84 which is mounted elastically by the spring 85 in the valve chamber and closes the through hole 82, Cap screw 86 is fastened to seal the open outer end.

Therefore, when air flows into the fluid filled in the fluid receiving chamber 13, if the air pressure is larger than the elasticity of the spring 85, the ball valve 84 is pushed to the valve chamber 81 through the through-hole 82. Since the inflow is automatically exhausted to the outside through the exhaust passage 83, the circulation of the fluid is not impeded.

In addition, when the hydraulic pressure generated by the operation of the gear pump exceeds the required level in the body, the hydraulic pressure back to the fluid storage chamber 13 side, so that the pressure adjustment valve to prevent the generation of the cylinder (60) ( 90 and 90 'are laid respectively.

The pressure regulating valves are valve chambers 91 and 91 ′ which are horizontally formed so that outer ends of the pressure control valves are respectively opened at middle portions of both sides of the body 10, and respective inner ends of the valve chambers and the first and second fluid passages. Discharge holes 92 and 92 'formed to connect the gaps, recovery passages 93 and 93' vertically penetrated between the inner bottom surface of the valve chamber and the inner upper surface of the fluid chamber; Caps for sealing the open ends of the valve chambers with opening and closing sides 94 and 94 ', which are elastically mounted with springs 95 and 95', respectively, in the valve chamber to close the discharge holes. It consists of screws 96 and 96 '.

Therefore, when the hydraulic pressure generated by the operation of the gear pumps 30 and 30 'is greater than the elasticity of the springs 95 and 95' above the required level, the opening and closing sides 94 and 94 'are pushed and the discharge hole ( 92 and 92 'are introduced into the valve chambers 91 and 91' and sent to the fluid receiving chamber 13 via the recovery passages 93 and 93 ', so that excessive pressure is supplied to the cylinder 60. This prevents damage.

In the hydraulic cylinder according to the embodiment of the present invention configured as described above, when the motor 20 is driven forward, the gear pump 30 rotates forward (clockwise), and accordingly, the gear pump 30 'is engaged and rotated, so that pumping is performed. Is performed.

In this case, the discharge operation proceeds to the first flow path 15 by the forward rotation of the gear pump 30, and the suction operation proceeds to the second flow path 15 ′.

Therefore, the fluid filled in the fluid receiving chamber 13, each of the passages 14, 14 ', 15, 15' and the valve chamber 12 has a second fluid at the second fluid passage 14 'side. A circulating operation is sucked into the pump chamber 11 through the flow passage 15 'and discharged to the first fluid passage 14 through the first flow passage 15. At this time, the fluid discharged to the first fluid passage side is performed. A part of the part moves to the left side of the valve chamber 12 and a part of the part moves to the left side of the fluid chamber 13.

However, since the shutoff valve 70 is mounted in the fluid accommodation chamber so that the first and second fluid passages are blocked from passing through each other through the fluid accommodation chamber, some of the fluid may be in the first fluid passage at the beginning of the pumping operation. 14) flows to the left side of the fluid chamber which is partitioned left and right by the shutoff valve, but is moved to the right by the pressure of the fluid (hereinafter referred to as 'hydraulic') that the shutoff valve flows to the right side thereof. When the end of the braking rod (71 ') extending in contact with the inner surface of the sealing cap 131 is no longer able to move, from this time, the hydraulic pressure from the left side of the valve chamber 12 partitioned inside by the pressure valve 40 Will only move to.

In addition, in this process, the fluid on the right side of the fluid receiving chamber is discharged to the second fluid passage 14 'by the suction force generated on the second flow passage 15', so that the shutoff valve is closed. ') Is smoothly moved to the right until braking, as well as the hydraulic pressure is not applied to the ball valve 84 when the shutoff valve is moved to the right, so that the through-hole 82 is closed to the exhaust valve 80 The fluid will not leak out.

When the hydraulic pressure moved to the left side of the valve chamber 12 is increased by this operation, the pressure side 40 is pushed to the right by the pressure, so that the pressure pin 41 'extending at the right end thereof is second checked. The check ball 52 'is pushed to the right through the inlet hole 511' of the valve 50 'so that the spring 53' is compressed and the inlet hole 511 'is opened. It is communicated with.

In addition, when the hydraulic pressure moved to the left side of the valve chamber 12 is greater than the spring 53 elasticity of the first check valve 50, the check ball 52 is pushed to the left, so that the spring 53 is compressed and the inlet hole 511 is opened to communicate with the outlet hole (512).

In such a state, the hydraulic pressure discharged to the first fluid passage 14 flows into the rear end of the cylinder 60 through the inlet 61 through the first check valve 50 and the passage 16, thereby forming a piston ( The rod 64 is advanced by pushing 63).

At this time, the fluid filled in front of the piston 63 in the cylinder flows out through the outlet port 62 as the piston moves forward, and passes through the passage 16 'and the second check valve 50' opened. Since it is moved to the second fluid passage 14 'side, it is sucked into the pump chamber 11 via the second flow passage 15' connected thereto and discharged to the first flow passage 15 side into the rear end of the cylinder 60. The rod 64 continues to advance because the incoming process continues.

In this operation process, the forward movement of the rod 64 may be stopped, or when the forward movement is completed, the driving of the motor 20 may be stopped.

In this case, since the pumping operation is stopped, the suction and discharge of the fluid are stopped and the hydraulic pressure is extinguished. Therefore, the check ball 52 flows into the spring 53 of the first check valve 50 compressed by the hydraulic pressure. The ball 511 is immediately closed, and the pressure side 40 is unable to push the check ball 52 'of the second check valve 50' any more, so that the compressed spring 53 'is opened with a shot. The check ball 52 'closes the inlet hole 511' immediately.

When the first and second check valves are closed in this operation, the movement of the fluid is immediately stopped. The advancement of the rod 64 is quickly and accurately braked as well as reliably maintained.

On the other hand, if the rod 64 is to be reversed, the motor 20 is reversely driven. In this case, the gear pump 30 is reversely rotated (counterclockwise), so this time to the second flow path 15 '. Since the discharge operation proceeds and the suction operation progresses on the first flow path 15 side, the movement of the hydraulic pressure is performed as opposed to when the rod is advanced.

Therefore, at this time, since the check ball 52 'closing the inlet hole 511' is pushed by the hydraulic pressure, the second check valve 50 'is opened, so that the hydraulic pressure discharged from the pump chamber 11 passes through the passage 16'. It is introduced into the front end of the cylinder 60 through the piston to reverse the piston 63, and at the same time the pressure valve 40 is pushed to the left in the valve chamber 12 by the hydraulic pressure, so that the pressure pin extended to the left end As the 41 passes through the inlet hole 511 and pushes the check ball 52, the first check valve 50 is also opened.

In this case, the fluid filled in the rear side in the cylinder 60 flows out through the inlet 61 at the pressure according to the back of the piston 63, and the passage 16, the first check valve 50, and the valve chamber ( The process of being sucked into the pump chamber 11 through the left side and the first fluid passage 14 and the first flow passage 15 of 12) and discharged to the second flow passage 15 'is introduced into the tip of the cylinder. As it continues, the rod 64 continues to retract.

In addition, since the pumping operation is stopped by stopping the driving of the motor 20 when the reverse of the rod 64 is stopped or when the reverse is completed, the hydraulic pressure is extinguished and the springs 53, 53 'are simultaneously Since the check balls 52 and 52 'are pushed to close the inlet holes 511 and 511' immediately, the movement of the fluid is stopped so that the rod stops quickly and accurately, as well as the braking state of the rod. Is maintained.

The hydraulic cylinder of the present invention operated as described above is provided with a pressure valve mounted in the valve chamber so as to be moved opposite to the direction of movement by hydraulic pressure, thereby simultaneously opening a check valve which is not opened by hydraulic pressure among the first and second check valves. As the hydraulic pressure is circulated quickly and smoothly, the cylinder is operated quickly and the check valves are immediately closed when the pumping operation stops to block the circulation of the fluid, which makes braking easier and prevents the rod from being pushed during operation. Only forward and reverse rotation can control the direction of the rod forward and backward accurately.

In addition, since the actuator body and the cylinder are integrated and a separate fluid tank or a directional control valve is not used, the overall structure is simple, and accordingly, miniaturization is possible and manufacturing costs are reduced.

Claims (3)

The motor 20 is installed in the front. The shaft 21 of the motor is coupled to the shaft hole penetrating horizontally from the front to the upper side of the pump chamber 11 formed in the rear, the upper side is formed through the valve chamber 12 transverse from side to side, In the lower portion, the fluid receiving chamber 13 is formed such that only one end thereof is opened to one side of the body 10, and the sealing end is fastened by sealing the cap 131 to the open one end, and the valve chamber 12 is intermediate. First and second fluid passages (14, 14 ') are vertically isolated between both bottom surfaces of the portion and both sides of the intermediate portion of the fluid chamber (13), and the first and second fluid passages A driver body (10) having horizontally isolated first and second flow paths (15) and (15 ') connecting them to each other between each intermediate portion and the middle of the pump chamber (11); Gear pumps 30 and 30 'which are fixedly engaged with each other in the upper and lower sides of the pump chamber 11 and rotated by the motor 20; A pressurizing valve 40 mounted on the middle of the valve chamber 12 so as to move left and right and having pressurizing pins 41 and 41 'protruding from both end surfaces thereof; It is mounted on both ends of the valve chamber, each of the inlet hole (511, 511 ') is formed on the front of the inner end, the outlet hole (512, 512') is formed on the upper surface of the inner end side, the outer end of the valve tube (51) (51 '), and check balls (52) (52'), which are built into these tubes to open and close the inlet (511) (511 ') and the outlet (512) (512'), Springs 53 and 531 mounted in the valve pipes 51 and 51 'and the rear ends of the valve pipes 51 and 51' are opened to give the check balls to the inflow hole side. First and second check valves 50 and 50 ', which are cap screws 54, 54' fastened to both outer ends of the valve chamber 12 to seal; The inlet 61 of the rear end side is connected to the outlet hole 512 of the valve pipe 51, the outlet 62 of the front end side is connected to the outlet hole 512 'of the valve pipe 51' body. A cylinder (60) mounted on the (10); In the center of both sides, the braking rods 71 and 71 'extend to a predetermined length and do not exceed an interval between the lower ends of the first and second fluid passages 14 and 14' in the fluid receiving chamber 13. Mounted reciprocally to partition the interior of the fluid receiving chamber 13 so as not to communicate with both the first and second fluid passages 14, 14 ', so that the gear pumps 30, 30' are rotated and pumped. It is characterized in that it is provided with a shut-off valve 70 to allow the fluid to be supplied to the cylinder 60 side is not circulated only in the receiving chamber and the first and second fluid passage and the pump chamber and the first and second flow passage when performed. Hydraulic cylinder. 2. The sealing cap 131 has a valve chamber (81) formed so as to have an outer end open to the sealing cap, and a through hole (82) formed in the center of the inner end of the valve chamber so as to communicate with the fluid receiving chamber (13). An exhaust passage 83 formed to penetrate from the inner upper surface of the valve chamber to the outer outer surface of the sealing cap, and a ball valve mounted elastically by the spring 85 in the valve chamber to close the through hole 82; 84) and an exhaust valve (80) consisting of a cap screw (86) which is fastened to seal the open outer end of the valve chamber. 2. The body (10) according to claim 1, wherein the body (10) has valve chambers (91) and (91 ') formed horizontally so that outer ends of the body parts are open to both middle portions thereof, and each inner end of the valve chamber and the first, 2 discharge holes 92 and 92 'formed to connect between the fluid passages 14 and 14', the inner bottom of the valve chambers 91 and 91 'and the fluid receiving chamber 13 Recovery passages 93 and 93 'which are vertically penetrated between the inner upper surface and springs 95 and 95' are respectively mounted in the valve chambers 91 and 91 'so as to be discharged. 92 and 92 'and closing valves 94 and 94' and cap screws 96 and 96 'which are fastened to seal the open outer ends of the valve chambers. 90) The hydraulic cylinder, characterized in that by installing (90 ').