Built-in spring piston cylinder

Abstract

The utility model relates to the technical field of piston type cylinder especially for built -in spring piston type cylinder, including support rod, lower cylinder cover, cylinder body, upper cylinder cover, piston rod, the lower cylinder cover and upper cylinder cover are located cylinder body's upper and lower both ends respectively, the number of support rod is two, two support rod all pass through lower cylinder cover and upper cylinder cover, and each support rod all is fixedly installed with upper cylinder cover through fastening screw and connects, the piston rod upper end part passes through the inside of piston piece, and piston rod passes through locking nut and is fixedly installed with piston piece and sets up, the lower end part of piston rod passes through and extends lower cylinder cover, the device adopts two support rods to connect cylinder body, cylinder cover whole, and support rod realizes and valve connection, and two support rods guide piston, guarantee piston to move stably up and down, can prevent the radial rotation movement of piston, whole simple structure, part design less, reduce cost, realize function and simplify structure simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of piston cylinder technology, specifically to a piston cylinder with built-in spring. Background Technology

[0002] An internal spring piston cylinder is a pneumatic component that uses the combined action of compressed air and a spring to achieve reciprocating motion. Its core structure includes a cylinder, piston, piston rod, and internal spring. The piston is driven by compressed air and automatically resets by the spring. Traditional pneumatic actuators, used in regulating valves, move the valve stem up and down to open and close the valve. Common types include diaphragm actuators: diaphragm cylinders use a diaphragm instead of a piston and consist of a cylinder body, diaphragm, diaphragm disc, and piston rod. Compressed air acts on the diaphragm, causing it to deform and drive the piston rod. Cylinder actuators: compressed air acts on both ends of the piston, pushing it to reciprocate, thus extending or retracting the piston rod. Traditional piston-cylinder actuators are large and heavy, with many complex components, making them inconvenient to use and lacking in practicality. Utility Model Content

[0003] The purpose of this invention is to provide a built-in spring piston cylinder to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a built-in spring piston cylinder, including a support rod, a lower cylinder head, a cylinder body, an upper cylinder head, and a piston rod. The lower cylinder head and the upper cylinder head are located at the upper and lower ends of the cylinder body, respectively. There are two support rods, both of which pass through the lower cylinder head and the upper cylinder head, and each support rod is fixedly connected to the upper cylinder head by fastening screws. Both of the support rods have springs fitted onto their outer walls; The cylinder body is internally slidably connected to a piston component; A lifting ring is fixedly installed on the top surface of the upper cylinder head; The upper end of the piston rod passes through the interior of the piston assembly, and the piston rod is fixedly installed with the piston assembly by a locking nut. The lower end of the piston rod passes through and extends out of the lower cylinder head, and a limit member is fixedly connected to the outer wall of the extended portion of the lower end of the piston rod.

[0005] The beneficial effects of this utility model are as follows: This device uses double support rods to connect the cylinder body and cylinder head as a whole. The support rods are connected to the valve without the need for cylinder head flange bolts. The actuator has no external connecting bolts, thereby reducing weight and volume. The double support rods guide the piston, ensuring smooth up-and-down movement of the piston. No additional parts are needed to prevent radial rotation of the piston. The piston is guided by two support rods, making the piston run smoothly and without friction with the cylinder wall, further increasing its service life. The spring is set inside the cylinder body, eliminating the need for a spring seat guide. Furthermore, by changing the installation of the spring in different chambers inside the cylinder body, the piston's action mode can be changed. The overall structure is simple, with fewer parts, reducing costs and achieving functionality while simplifying the structure.

[0006] To achieve the effect of dividing the cylinder body into two chambers: The piston is further configured such that a sealing ring is provided on the side wall of the piston component that is slidably connected to the cylinder body, and the interior of the cylinder body is divided into upper and lower chambers by the piston component.

[0007] By adopting the above technical solution, and by setting a sealing ring on the side wall of the piston component, the inside of the cylinder is divided into upper and lower chambers through the piston component.

[0008] To achieve smooth operation of the piston within the cylinder, the piston is positioned to rotate radially within the cylinder. The configuration is further defined as follows: both support rods pass through the piston member and are located on both sides of the piston member, and the outer side wall of each support rod is slidably connected to the inner side wall of the piston member.

[0009] By adopting the above technical solution, two support rods are installed through the piston component, allowing the piston component to move up and down inside the cylinder body guided by the two support rods. This ensures smooth operation of the piston component and prevents radial rotation of the piston without the need for additional parts.

[0010] To achieve the effect of limiting the piston rod and the lower cylinder head: The piston rod is further configured such that its outer sidewall is slidably connected to the inner sidewall of the lower cylinder head, and the top surface of the limiting member is in contact with the bottom surface of the lower cylinder head.

[0011] By adopting the above technical solution, when the piston rod is pushed to extend and retract by the piston component, the piston rod is slidably connected to the lower cylinder head, and the piston rod is in contact with the lower cylinder head through the abutting contact of the limiting component, thereby achieving the effect of limiting the piston rod.

[0012] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall structure of this utility model in different directions of action.

[0014] In the diagram: 1. Support rod; 2. Lower cylinder head; 3. Spring component; 4. Cylinder block; 5. Piston component; 6. Sealing ring; 7. Upper cylinder head; 8. Fastening screw; 9. Lifting ring; 10. Locking nut; 11. Piston rod; 12. Limiting component. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0016] Please see Figures 1 to 2 The built-in spring piston cylinder includes a support rod 1, a lower cylinder head 2, a cylinder body 4, an upper cylinder head 7, and a piston rod 11. The lower cylinder head 2 and the upper cylinder head 7 are located at the upper and lower ends of the cylinder body 4, respectively. There are two support rods 1, both of which pass through the lower cylinder head 2 and the upper cylinder head 7, and each support rod 1 is fixedly connected to the upper cylinder head 7 by fastening screws 8. Spring elements 3 are fitted onto the outer walls of both support rods 1; The cylinder body 4 is internally connected to a piston component 5 via a sliding connection; A lifting ring 9 is fixedly installed on the top surface of the upper cylinder head 7; The upper end of the piston rod 11 passes through the interior of the piston component 5, and the piston rod 11 is fixedly installed with the piston component 5 by the locking nut 10. The lower end of the piston rod 11 passes through and extends out of the lower cylinder head 2, and the outer side wall of the extended portion of the lower end of the piston rod 11 is fixedly connected to the limiting member 12.

[0017] In this embodiment, as Figure 1 and Figure 2 As shown, the piston 5 is slidably connected to the cylinder 4 and the side wall is provided with a sealing ring 6. The interior of the cylinder 4 is divided into upper and lower chambers by the piston 5.

[0018] In this embodiment, as Figure 1 and Figure 2 As shown, both support rods 1 pass through the piston component 5 and are located on both sides of the piston component 5, and the outer side wall of each support rod 1 is slidably connected to the inner side wall of the piston component 5.

[0019] In this embodiment, as Figure 1 and Figure 2 As shown, the outer wall of the piston rod 11 is slidably connected to the inner wall of the lower cylinder head 2, and the top surface of the limiting member 12 is in contact with the bottom surface of the lower cylinder head 2.

[0020] The working process of this built-in spring piston cylinder is as follows: When this device is installed, it is convenient to use the lifting ring 9 on the top surface. It is connected to the valve through two support rods 1. The cylinder body 4, upper cylinder head 7 and lower cylinder head 2 are connected as a whole by fastening screws 8. The piston 5 is pushed to slide up and down inside the cylinder body 4, thereby pushing the piston rod 11 to extend and retract. During this process, when the piston 5 slides within the cylinder 4, it is guided by two support rods 1, which makes the piston 5 run smoothly and without friction with the cylinder wall. The piston rod 11 and the piston 5 achieve the reset function through the spring 3 sleeved on the two support rods 1. Since the cylinder 4 is divided into upper and lower chambers by the piston 5, the spring 3 is installed in the two different chambers (see the instruction manual for details). Figure 2 This allows for adjustment of the direction of action of the piston rod 11, further improving the practicality of the device.

[0021] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0022] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0023] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without modification, should all be considered within the protection scope of this utility model.

Claims

1. A built-in spring piston cylinder, comprising a support rod (1), a lower cylinder head (2), a cylinder body (4), an upper cylinder head (7), and a piston rod (11), characterized in that: The lower cylinder head (2) and the upper cylinder head (7) are located at the upper and lower ends of the cylinder body (4), respectively. There are two support rods (1). Both support rods (1) pass through the lower cylinder head (2) and the upper cylinder head (7), and each support rod (1) is fixedly connected to the upper cylinder head (7) by fastening screws (8). Springs (3) are fitted onto the outer walls of both support rods (1). The cylinder body (4) is provided with a piston component (5) in a sliding connection inside; A lifting ring (9) is fixedly installed on the top surface of the upper cylinder head (7); The upper end of the piston rod (11) passes through the interior of the piston component (5), and the piston rod (11) is fixedly installed with the piston component (5) by a locking nut (10). The lower end of the piston rod (11) passes through and extends out of the lower cylinder cover (2), and a limiting member (12) is fixedly connected to the outer wall of the extended portion of the lower end of the piston rod (11).

2. The built-in spring piston cylinder as described in claim 1, characterized in that: The piston (5) is slidably connected to the cylinder (4) and the side wall is provided with a sealing ring (6). The interior of the cylinder (4) is divided into upper and lower chambers by the piston (5).

3. The built-in spring piston cylinder as described in claim 1, characterized in that: Both of the support rods (1) pass through the piston (5) and are located on both sides of the piston (5), and the outer side wall of each support rod (1) is slidably connected to the inner side wall of the piston (5).

4. The built-in spring piston cylinder as described in claim 1, characterized in that: The outer wall of the piston rod (11) is slidably connected to the inner wall of the lower cylinder head (2), and the top surface of the limiting member (12) is in contact with the bottom surface of the lower cylinder head (2).

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