Integral feedback device aluminum alloy direct stroke pneumatic actuator

Abstract

This utility model discloses an integrated aluminum alloy linear-stroke pneumatic actuator with a feedback device, comprising a cylinder, a piston, an actuator rod, and a spring feedback device. The cylinder is divided into a first actuator chamber and a second actuator chamber by the piston. Air passages on the cylinder connect the first and second actuator chambers. The actuator rod passes through the cylinder and is fixed to the piston. The spring feedback device includes an indicator rod linked to the actuator rod, a spring sleeved on the indicator rod, and a micro-motion stroke sensor. This utility model's integrated aluminum alloy pneumatic actuator is lighter and more compact, greatly optimizing installation space requirements. By optimizing the internal structural space, piston plate offset and vibration are reduced, improving service life. The top-mounted spring feedback device, when the air source gradually stabilizes to the design pressure, the cylinder thrust drives the piston to the desired position, compressing the spring, and the indicator rod's micro-motion stroke provides feedback on the actuator's on / off state.

Description

Technical Field

[0001] This utility model relates to the field of actuator technology, specifically to an integrated aluminum alloy linear pneumatic actuator with feedback device. Background Technology

[0002] An actuator is a device used to drive a mechanism, typically a valve, to open or close automatically. A linear actuator is one type of actuator that primarily uses an air supply to drive the piston, thus automatically opening or closing the valve connected to the piston rod.

[0003] Traditional pneumatic actuators are not only complex to install and bulky, making them inconvenient to use, but they also generally lack feedback devices. The action of the pneumatic actuator relies entirely on the feedback of the valve's action, which is somewhat insufficient in judging the operating status. Utility Model Content

[0004] In view of the prior art, the purpose of this utility model is to provide a linear pneumatic actuator with a built-in feedback device, which can drive the piston to open to the position when the air source gradually stabilizes to the design pressure, so that the spring is compressed and the micro-motion stroke of the indicator rod provides feedback on the switch status of the actuator.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an integral aluminum alloy linear pneumatic actuator with feedback device, comprising a cylinder, a piston, an actuator rod, and a spring feedback device. The cylinder is divided into a first actuator chamber and a second actuator chamber by the piston. An air passage is provided on the cylinder to connect the first actuator chamber and the second actuator chamber respectively. The actuator rod passes through the cylinder and is fixed on the piston. The spring feedback device includes an indicator rod linked to the actuator rod, a spring sleeved on the indicator rod, and a micro-motion stroke sensor.

[0006] As a further feature of the above solution, the cylinder body is also provided with an inner retaining spring groove, a cover and a sealing element. The sealing element is sleeved on the cover, and the cover is fixed to the cylinder body by the inner retaining spring to close the rear opening of the cylinder body.

[0007] As a further provision of the above solution, the piston component includes a piston plate fixedly disposed with the actuator rod, and a sealing ring and an airtight rubber ring are also sleeved between the piston plate and the inner wall of the cylinder.

[0008] As a further provision of the above scheme, the end of the cylinder is provided with a mounting cavity for the spring feedback device, the indicator rod passes through the mounting cavity, and has a stepped part and a pressure pad ring sleeved on it. One end of the spring abuts against the pressure pad ring, and the other end abuts against the micro-motion stroke sensor.

[0009] As a further feature of the above scheme, the air passages of the first and second execution chambers are provided with mounting holes at the outer openings on the cylinder surface for mounting fixing screws for external connection of the air passages.

[0010] Beneficial effects: Compared with traditional pneumatic actuators, the aluminum alloy pneumatic actuator of this embodiment has an integrated design, making it lighter and greatly optimizing the installation space requirements. By optimizing the internal structural space, the piston plate offset vibration is reduced, and the service life is improved. The top-mounted spring feedback device allows the piston to open to the designed pressure when the air source gradually stabilizes. This causes the spring to compress, and the micro-motion stroke of the indicator rod provides feedback on the actuator's switching status. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the aluminum alloy linear pneumatic actuator of this utility model.

[0012] Figure 2 This is a schematic diagram of the extended actuator rod of the aluminum alloy linear pneumatic actuator of this utility model.

[0013] Figure 3 This is a schematic diagram of the retraction of the actuator rod of the aluminum alloy linear pneumatic actuator of this utility model.

[0014] Reference numerals: 1. Cylinder body; 11. Inner retaining spring groove; 12. Cover; 13. Seal; 14. Inner retaining spring; 15. Rear end opening; 16. Mounting cavity; 2. Piston; 21. First actuating cavity; 22. Second actuating cavity; 23. Airtight rubber ring; 25. Plug plate; 26. Sealing ring; 3. Actuating rod; 4. Spring feedback device; 41. Indicator rod; 42. Spring; 43. Micro-motion stroke sensor; 44. Stepped section; 45. Pressure pad ring; 5. Air passage; 56. Mounting hole. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other.

[0016] like Figure 1-3 The illustrated integrated aluminum alloy linear pneumatic actuator with feedback device includes a cylinder body 1, a piston 2, an actuator rod 3, and a spring feedback device 4. This pneumatic actuator, as shown in the illustration, is... Figure 1 The integrated design shown is as follows: Figure 2The internal structure shown is compact and scientific, lighter in weight, and greatly optimizes installation space requirements. A guiding annular groove and ring block are provided between the piston, cylinder, and cap to improve service life. The actuator rod 3 has a top-mounted spring feedback device 4. When the air supply gradually stabilizes to the design pressure, the cylinder thrust drives the piston 2 to its full position, compressing the spring 42. The indicator rod 41 triggers the micro-motion stroke sensor 43 to provide feedback on the actuator's on / off state. The extended indicator rod 41 also facilitates indication of state changes. The cylinder 1 is divided into a first execution chamber 21 and a second execution chamber 22 by the piston 2. Air passages 5 on the cylinder 1 connect the first and second execution chambers 21 and 22 respectively. The actuator rod 3 passes through the cylinder 1 and is fixed to the piston 2. The spring feedback device 4 includes an indicator rod 41 linked to the actuator rod 3, a spring 42 sleeved on the indicator rod 41, and a micro-motion stroke sensor 43. Driven by an external air supply device, external air selectively enters the first or second execution chamber 21 or 22 through the air passages 5, pushing the piston 2 as it moves. Figure 2 or Figure 3 The switching state.

[0017] As a further provision of the above scheme, the cylinder body 1 is also provided with an inner retaining spring groove 11, a cover 12, and a sealing element 13. The sealing element 13 is sleeved on the cover 12. The cover 12 is fixed to the cylinder body 1 by the inner retaining spring element 14 to close the rear end opening 15 of the cylinder body 1. During assembly, the cover 12 is fastened to the rear end opening 15, and then the inner retaining spring element 14 is used to snap into the inner retaining spring groove 11 to fasten the cover 12 to the rear end of the cylinder body 1, thereby enclosing the piston 2 and other components inside the cylinder body 1.

[0018] As a further provision of the above scheme, the piston component 2 includes a plug plate 25 fixedly disposed with the actuator rod 3, and a sealing ring component 26 and an airtight rubber ring 23 are also sleeved between the plug plate 25 and the inner wall of the cylinder body 1.

[0019] As a further provision of the above scheme, the end of the cylinder 1 is provided with a mounting cavity 16 for the spring feedback device 4. The indicator rod 41 passes through the mounting cavity 16, and has a step portion 44 and a pressure pad ring 45 sleeved on it. One end of the spring member 42 abuts against the pressure pad ring 45, and the other end abuts against the micro-motion stroke sensor 43.

[0020] As a further feature of the above scheme, the air passages 5 of the first execution chamber 21 and the second execution chamber 22 are provided with mounting holes 56 at the outer openings on the surface of the cylinder body 1 for mounting fixing screws for external connection of the air passages 5.

[0021] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of this utility model and its equivalents, this utility model also intends to include these modifications and variations.

Claims

1. An integral aluminum alloy linear pneumatic actuator with feedback device, characterized in that: The device includes a cylinder (1), a piston (2), an actuator (3), and a spring feedback device (4). The cylinder (1) is divided into a first actuator chamber (21) and a second actuator chamber (22) by the piston (2). The cylinder (1) is provided with an air passage (5) that connects the first actuator chamber (21) and the second actuator chamber (22) respectively. The actuator (3) passes through the cylinder (1) and is fixed on the piston (2). The spring feedback device (4) includes an indicator rod (41) that is linked with the actuator (3), a spring (42) sleeved on the indicator rod (41), and a micro-motion stroke sensor (43).

2. The integral aluminum alloy linear pneumatic actuator with feedback device according to claim 1, characterized in that: The cylinder (1) is also provided with an inner retaining spring groove (11), a cover (12) and a sealing element (13). The sealing element (13) is sleeved on the cover (12). The cover (12) is fixed on the cylinder (1) by the inner retaining spring element (14) to close the rear opening (15) of the cylinder (1).

3. The integral aluminum alloy linear pneumatic actuator with feedback device according to claim 1, characterized in that: The piston component (2) includes a piston plate (25) fixedly disposed with the actuator (3), and a sealing ring component (26) and an airtight rubber ring (23) are also sleeved between the piston plate (25) and the inner wall of the cylinder (1).

4. The integral aluminum alloy linear pneumatic actuator with feedback device according to claim 1, characterized in that: The cylinder (1) has a mounting cavity (16) for the spring feedback device (4) at its end. The indicator rod (41) passes through the mounting cavity (16) and has a step (44) on it and a pressure pad ring (45) sleeved on it. One end of the spring (42) abuts against the pressure pad ring (45) and the other end abuts against the micro-motion stroke sensor (43).

5. A monoblock aluminum alloy direct-acting pneumatic actuator with feedback according to claim 1, characterized in that: The air passages (5) of the first execution chamber (21) and the second execution chamber (22) are provided with mounting holes (56) at the outer openings on the surface of the cylinder body (1) for mounting the fixing screws for external connection of the air passages (5).

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