High-frequency actuator with piston rod stability keeping mechanism

Abstract

The utility model relates to the technical field of actuators, in particular to a high-frequency actuator with a piston rod stability keeping mechanism, which comprises a cylinder barrel, two ends of the cylinder barrel are respectively sealed through a first end cover and a second end cover to form a mounting cavity, a piston is arranged in the cylinder barrel, and a first piston rod and a second piston rod are arranged on two sides of the piston. The first piston rod can penetrate through the first end cover; the second piston rod can penetrate through the second end cover; a first guide sleeve is arranged on the inner wall of the first end cover, a second guide sleeve is arranged on the first side face of the piston, a guide connecting cylinder is movably arranged between the first guide sleeve and the second guide sleeve, and the first piston rod is sleeved and limited by the first guide sleeve, the guide sleeve connecting cylinder and the second guide sleeve; the outer side of the first guide sleeve and the outer side of the second guide sleeve are sleeved through the same spring. The retaining mechanism is simple in structure and easy to assemble and maintain, does not interfere with the operation of the actuator, and can effectively prolong the service life of the high-frequency actuator and improve the control precision of the high-frequency actuator.

Description

TECHNICAL FIELD

[0001] The utility model relates to actuator technical field especially relates to a high frequency actuator with piston rod stable holding mechanism. BACKGROUND

[0002] High frequency pneumatic actuator is a kind of pneumatic actuator that can work at high frequency, it uses compressed air as power source, and drives the opening and closing of valve through the reciprocating motion of cylinder piston. When control signal arrives, air control valve opens or closes, makes compressed air enter or discharge the cylinder of pneumatic actuator, thereby propelling piston movement, and further transmits the movement to valve stem of valve through connecting rod and other transmission mechanism, realizes the opening and closing or regulation of valve. It has fast response ability, can complete frequent action control in short time, meets the demand of high frequency operation. It is widely used in manufacturing industry, industrial automation equipment, chemical industry and petroleum industry.

[0003] In the existing high frequency pneumatic actuator, in order to realize the rapid closing of valve in emergency, a spring is usually sleeved outside the piston rod, the piston rod drives the compression of spring when the valve is in the open state, and when the valve needs to be closed quickly, the resistance of piston rod is directly eliminated, the piston is directly driven to move quickly under the action of spring return force, and then the rapid closing of valve is realized.

[0004] Because the traditional way is to directly sleeve spring outside the piston rod, deformation of piston rod is easily caused in long-term use, and then the sealing property between piston side and actuator cylinder body is affected, air leakage is easily caused, the effect of pneumatic drive is further affected, the precision of high frequency actuator in controlling the opening or closing of valve is out of adjustment, and safety accidents are easily caused.

[0005] Therefore, a new technical scheme is needed to solve the above technical problems. UTILITY MODEL CONTENTS

[0006] The utility model aims at overcoming the problems of prior art, provides a kind of high frequency actuator with piston rod stable holding mechanism, to solve the technical problems of the prior art in which spring is directly sleeved outside the piston rod, deformation of piston rod is easily caused in long-term use, and then the sealing property between piston side and actuator cylinder body is affected, air leakage is easily caused.

[0007] The above purpose is realized by the following technical scheme:

[0008] The utility model provides a high frequency actuator with piston rod stable holding mechanism, including cylinder, both ends of cylinder are sealed and form mounting cavity through first end cover and second end cover respectively, piston is arranged in mounting cavity, the first side of piston is provided with first piston rod, the second side of piston is provided with second piston rod, first piston rod can pass through first end cover through -hole of the first end cover axial position, second piston rod can pass through second end cover through -hole of the second end cover axial position, first end cover is further provided with first inlet and outlet hole, second end cover is further provided with second inlet and outlet hole, the inner wall of first end cover is provided with first guide sleeve, the first side of piston is provided with second guide sleeve, first guide sleeve and second guide sleeve are movably provided with guide connecting cylinder between, first piston rod is sleeved and limited by first guide sleeve, guide sleeve connecting cylinder and second guide sleeve, the outside of first guide sleeve and second guide sleeve is sleeved by same spring.

[0009] Further, the first guide sleeve is a T-shaped guide sleeve, arranged at the axial position of the inner wall of the first end cover, comprising a first guide sleeve body and a first guide sleeve spring stop ring connected to each other; the second guide sleeve is a T-shaped guide sleeve, arranged at the axial position of the first side of the piston, comprising a second guide sleeve body and a second guide sleeve spring stop ring connected to each other; one end of the spring abuts against the first guide sleeve spring stop ring, and the other end abuts against the second guide sleeve spring stop ring.

[0010] Further, the inner wall of the first end cover is provided with a first guide sleeve embedding groove capable of partially embedding the first guide sleeve, and the first side of the piston is provided with a second guide sleeve embedding groove capable of partially embedding the second guide sleeve.

[0011] Further, the axial position of the first guide sleeve is provided with a first guide sleeve through hole capable of penetrating the guide connecting cylinder, and the axial position of the second guide sleeve is provided with a second guide sleeve through hole capable of penetrating the guide connecting cylinder; the first end of the guide connecting cylinder extends into the first guide sleeve and is sleeved with a first limiting ring; the second end of the guide connecting cylinder extends into the second guide sleeve and is sleeved with a second limiting ring.

[0012] Further, the outer diameter of the first limiting ring is greater than the inner diameter of the first guide sleeve through hole, and the outer diameter of the second limiting ring is greater than the inner diameter of the second guide sleeve through hole.

[0013] Further, the inner wall of the first end cover and the second end cover is provided with a cylinder embedding groove capable of embedding the end of the cylinder.

[0014] Further, the outer diameters of the first end cover and the second end cover are greater than the outer diameter of the cylinder barrel, and the first end cover and the second end cover are connected by a pull rod.

[0015] The high-frequency actuator with the piston rod stable holding mechanism has the advantages that the first guide sleeve and the second guide sleeve are arranged on the inner wall of the first end cover and the first side surface of the piston, the first guide sleeve and the second guide sleeve are movably connected through the guide connecting cylinder, the spring is isolated from the piston rod, and the piston rod can be effectively limited and protected. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides a kind of high-frequency actuator with piston rod stable holding mechanism structure schematic view.

[0017] FIGURE MARK:

[0018] 1-cylinder barrel;

[0019] 2-first end cover, 201-first end cover through hole, 202-first guide sleeve slot, 203-first inlet and outlet hole;

[0020] 3-second end cover, 301-second end cover through hole, 302-second inlet and outlet hole;

[0021] 4-piston, 401-second guide sleeve slot;

[0022] 5-first guide sleeve, 501-first guide sleeve sleeve body, 502-first guide sleeve spring stop ring, 503-first guide sleeve through hole;

[0023] 6-second guide sleeve, 601-second guide sleeve sleeve body, 602-second guide sleeve spring stop ring, 603-second guide sleeve through hole;

[0024] 7-guide sleeve connecting cylinder, 701-first limit stop ring, 702-second limit stop ring;

[0025] 8-spring;

[0026] 9-first piston rod;

[0027] 10-second piston rod;

[0028] 11-cylinder barrel slot;

[0029] 12-pull rod. DETAILED DESCRIPTION

[0030] The utility model will be further explained in detail below according to the drawings and examples. The described examples are only a part of the utility model examples, not all examples. Based on the examples in the utility model, all other examples obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0031] As Figure 1 The utility model provides a high frequency actuator with piston rod stable holding mechanism, including cylinder 1, the both ends of cylinder 1 are sealed to form installation cavity through first end cover 2 and second end cover 3 respectively, be provided with piston 4 in the installation cavity, the first side of piston 4 is provided with first piston rod 9, the second side of piston is provided with second piston rod 10, first piston rod 9 can penetrate the first end cover through -hole 201 of the axial position of first end cover 2, second piston rod 10 can penetrate the second end cover through -hole 301 of the axial position of second end cover 3, first end cover 2 is also provided with first inlet and outlet gas hole 203, second end cover 3 is also provided with second inlet and outlet gas hole 302, by the first inlet and outlet gas hole 203 is led through, and the gas pressure is input to the second inlet and outlet gas hole 302, can drive piston 4 drive first piston rod 9 and second piston rod 10 to the direction of first end cover 2 synchronous movement, or, by the second inlet and outlet gas hole 302 is led through, and the gas pressure is input to the first inlet and outlet gas hole 203, can drive piston 4 drive first piston rod 9 and second piston rod 10 to the direction of second end cover 3 synchronous movement,

[0032] The inner wall of first end cover 2 is provided with first guide sleeve 5, the first side of piston 4 is provided with second guide sleeve 6, first guide sleeve 5 and second guide sleeve 6 are movably provided with guide connecting cylinder 7, first piston rod 9 is set with and is limited by first guide sleeve 5, guide sleeve connecting cylinder 7 and second guide sleeve 6.

[0033] The outer side of first guide sleeve 5 and second guide sleeve 6 is set with same spring 8.

[0034] Under the above structure, by the first inlet and outlet gas hole 203 is led through, and the gas pressure is input to the second inlet and outlet gas hole 302, can drive piston 4 drive second guide sleeve 6, first piston rod 9 and second piston rod 10 to the direction of first end cover 2 synchronous movement, at this moment spring 8 is compressed gradually,

[0035] Or, by conducting the second inlet and outlet air hole 302, and input air pressure to the first inlet and outlet air hole 203, the piston 4 can drive the first piston rod 9 and the second piston rod 10 to the direction of the second end cover 3 synchronous movement, when the spring 8 is gradually compressed.

[0036] The second piston rod 10 is connected with the valve;

[0037] When the valve is to be achieved quickly, then by conducting the second inlet and outlet air hole 302, when the second side of the piston 4 is eliminated by the gas pressure, the piston is driven to the second end cover 3 direction under the action of the reset force of the spring 8, the fast closing of the valve is completed;

[0038] Or, when the valve is to be achieved quickly, then by conducting the second inlet and outlet air hole 302, and input air pressure to the first inlet and outlet air hole 203, the piston is driven to the second end cover 3 direction under the action of the reset force of the spring 8 and the gas pressure on the first side, the fast closing of the valve is completed.

[0039] The first end cover 2 and the second end cover 3 in the embodiment are greater than the outer diameter of the cylinder 1, and are connected by the pull rod 12; through the action of a plurality of pull rods 12, the first end cover 2, the cylinder 1 and the second end cover 3 can be connected as a whole.

[0040] As shown in Figure 1 The first guide sleeve 5 and the second guide sleeve 6 of the embodiment are optimized, specifically:

[0041] The first guide sleeve 5 is a T-shaped guide sleeve, which is arranged at the axial position of the inner wall of the first end cover 2, and includes a first guide sleeve sleeve body 501 and a first guide sleeve spring stop ring 502 connected with each other;

[0042] The second guide sleeve 6 is a T-shaped guide sleeve, which is arranged at the axial position of the first side of the piston 4, and includes a second guide sleeve sleeve body 601 and a second guide sleeve spring stop ring 602 connected with each other;

[0043] One end of the spring 8 abuts against the first guide sleeve spring stop ring 502, and the other end abuts against the second guide sleeve spring stop ring 602.

[0044] It should be noted that the length of the spring 8 in the embodiment is not less than the maximum distance between the first guide sleeve spring stop ring 502 and the second guide sleeve spring stop ring 602;

[0045] Under the constraint, through the above structure of the definition, can ensure that the first guide sleeve 5 and the second guide sleeve 6 under the action of the spring force can be respectively connected with the inner wall of the first end cover 2 and the first side of the piston 4.

[0046] The inner wall of the first end cover 2 is provided with a first guide sleeve embedding groove 202 capable of partially embedding the first guide sleeve 5, and the first side of the piston 4 is provided with a second guide sleeve embedding groove 401 capable of partially embedding the second guide sleeve 6; under the action of the first guide sleeve embedding groove 202 and the second guide sleeve embedding groove 401, the displacement of the first guide sleeve 5 and the second guide sleeve 6 can be further prevented, and the first piston rod 9 can be better protected.

[0047] The first guide sleeve 5 is provided with a first guide sleeve through hole 503 at the axial position, and the second guide sleeve 6 is provided with a second guide sleeve through hole 603 capable of penetrating the guide connecting cylinder 7;

[0048] The first end of the guide connecting cylinder 7 extends into the first guide sleeve 5 and is sleeved with a first limiting stop ring 701;

[0049] The second end of the guide connecting cylinder 7 extends into the second guide sleeve 6 and is sleeved with a second limiting stop ring 702.

[0050] It should be noted that the outer diameter of the first limiting stop ring 701 in the embodiment is greater than the inner diameter of the first guide sleeve through hole 503, and the outer diameter of the second limiting stop ring 702 is greater than the inner diameter of the second guide sleeve through hole 603;

[0051] Through the joint action of the first limiting stop ring 701 and the second limiting stop ring 702, it can be ensured that the two ends of the guide connecting cylinder 7 will not be separated from the first guide sleeve 5 and the second guide sleeve 6, and the piston rod can be better protected.

[0052] During the movement of the piston 4, the guide connecting cylinder 7 can effectively guide and limit the movement of the second guide sleeve 6, so that it is always coaxial with the first guide sleeve 5.

[0053] In addition, the inner wall of the first end cover 2 and the second end cover 3 in the embodiment is provided with a cylinder embedding groove 11 capable of embedding the end of the cylinder 1; through this structure, the first end cover 2, the cylinder 1 and the second end cover 3 can be quickly assembled, and the sealing property of the mounting cavity can be ensured.

[0054] The above merely illustrates the implementation modes of the present application and is not used to limit the present application, and for those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-frequency actuator having a piston rod stable holding mechanism, characterized by, The application relates to a cylinder (1), the two ends of the cylinder (1) are sealed by a first end cover (2) and a second end cover (3) to form an installation cavity, a piston (4) is arranged in the installation cavity, a first piston rod (9) is arranged on the first side of the piston (4), a second piston rod (10) is arranged on the second side of the piston, the first piston rod (9) can penetrate through a first end cover through hole (201) arranged at the axial center position of the first end cover (2), the second piston rod (10) can penetrate through a second end cover through hole (301) arranged at the axial center position of the second end cover (3), a first air inlet and outlet hole (203) is further arranged on the first end cover (2), and a second air inlet and outlet hole (302) is further arranged on the second end cover (3). A first guide sleeve (5) is arranged on the inner wall of the first end cover (2), a second guide sleeve (6) is arranged on the first side of the piston (4), a guide connecting cylinder (7) is movably arranged between the first guide sleeve (5) and the second guide sleeve (6), and the first piston rod (9) is sleeved and limited by the first guide sleeve (5), the guide sleeve connecting cylinder (7) and the second guide sleeve (6). The outer sides of the first guide sleeve (5) and the second guide sleeve (6) are sleeved by the same spring (8).

2. A high frequency actuator having a piston rod stable holding mechanism according to claim 1, characterized in that The first guide sleeve (5) is a T-shaped guide sleeve arranged at the axial center position of the inner wall of the first end cover (2) and comprises a first guide sleeve sleeve body (501) and a first guide sleeve spring stop ring (502) connected with each other. The second guide sleeve (6) is a T-shaped guide sleeve arranged at the axial center position of the first side of the piston (4) and comprises a second guide sleeve sleeve body (601) and a second guide sleeve spring stop ring (602) connected with each other. One end of the spring (8) abuts against the first guide sleeve spring stop ring (502) and the other end abuts against the second guide sleeve spring stop ring (602).

3. A high frequency actuator with a stable holding mechanism for a piston rod according to claim 2, characterized in that A first guide sleeve embedding groove (202) capable of partially embedding the first guide sleeve (5) is arranged on the inner wall of the first end cover (2), and a second guide sleeve embedding groove (401) capable of partially embedding the second guide sleeve (6) is arranged on the first side of the piston (4).

4. A high frequency actuator with a stable holding mechanism for a piston rod according to claim 2 or 3, characterized in that A first guide sleeve through hole (503) capable of penetrating the guide connecting cylinder (7) is arranged at the axial center position of the first guide sleeve (5), and a second guide sleeve through hole (603) capable of penetrating the guide connecting cylinder (7) is arranged at the axial center position of the second guide sleeve (6). The first end of the guide connecting cylinder (7) extends into the first guide sleeve (5) and is sleeved with a first limiting stop ring (701). The second end of the guide connecting cylinder (7) extends into the second guide sleeve (6) and is sleeved with a second limiting stop ring (702).

5. A high frequency actuator having a piston rod stable holding mechanism according to claim 4, characterized in that The outer diameter of the first limiting stop ring (701) is larger than the inner diameter of the first guide sleeve through hole (503), and the outer diameter of the second limiting stop ring (702) is larger than the inner diameter of the second guide sleeve through hole (603).

6. A high frequency actuator having a piston rod stable holding mechanism according to claim 1, characterized in that The inner wall of the first end cover (2) and the second end cover (3) is provided with a cylinder embedding groove (11) capable of embedding the end of the cylinder (1).

7. A high frequency actuator with a stable holding mechanism for a piston rod according to claim 1 or 6, characterized in that The outer diameter of the first end cover (2) and the second end cover (3) is greater than the outer diameter of the cylinder (1), and they are connected through a pull rod (12).

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