Single-air-port double-force cylinder

Abstract

The utility model relates to a single-air-port double-force cylinder which comprises a cylinder shell, a middle cover, a first piston rod, a second piston rod, a first piston and a second piston. A first piston rod is slidably arranged on the middle cover in a sealing mode, a first piston is arranged at the rear end of the middle cover, the first piston and a rear cover form a first inflation cavity, and an inflation opening is formed in the rear cover. The front end of the first piston rod penetrates through the middle cover to be connected with the rear end of the second piston rod, and a second piston is arranged at the rear end of the second piston rod and forms a second inflation cavity with the middle cover. A connecting channel is arranged in the first piston rod, and the two inflation cavities are connected through the connecting channel. According to the double-force cylinder, simultaneous air supply of the two inflation cavities is achieved through the single air port, a control system is simplified, the length and the weight of equipment are reduced, and the double-force cylinder is particularly suitable for occasions with limited space.

Description

Technical Field

[0001] This utility model belongs to the field of cylinder technology, and in particular relates to a single-port force multiplier cylinder. Background Technology

[0002] A force multiplier cylinder is a device that amplifies force through a special structural design, widely used in applications requiring large thrust but with limited air pressure. The most common force multiplier cylinder structure consists of two cylinders connected in series, with internal piston rods threaded together. When air is supplied from both port 1 and port 2 simultaneously, the thrust of piston rod 2 is superimposed on piston rod 1, doubling the thrust at the front end of piston rod 1. However, this two-cylinder-in-series structure has several limitations. First, it requires two independent control systems to control the air supply to each cylinder, increasing system complexity and cost, and making synchronous control more difficult, potentially leading to unstable output force. Second, the series connection increases the length and weight of the force multiplier cylinder, making it unsuitable for applications with limited space or weight restrictions. Furthermore, the increased number of mechanical connecting parts makes it prone to wear and loosening over time, reducing system reliability and efficiency. Utility Model Content

[0003] (I) Purpose of the utility model

[0004] In order to overcome the above shortcomings, the purpose of this utility model is to provide a single-port force multiplier cylinder to solve the above technical problems.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the technical solution provided in this application is as follows:

[0007] A single-port multiplier cylinder includes a cylinder shell, a centrally sealed cover is provided in the middle of the cylinder shell, a first piston rod is slidably sealed on the central cover, a first piston is provided at the rear end of the first piston rod, a sealed first inflation chamber is formed between the first piston and the rear cover of the cylinder shell, an inflation port is provided at the rear cover, the front end of the first piston rod passes through the central cover and is connected to the rear end of a second piston rod, a second piston is provided at the rear end of the second piston rod, a sealed second inflation chamber is formed between the second piston and the central cover, and a connecting channel is provided in the first piston rod to connect the first inflation chamber and the second inflation chamber.

[0008] Preferably, the cylinder housing includes a front cover, the front cover and the middle cover are connected by a cylinder barrel, the middle cover and the rear cover are connected by a cylinder barrel, the middle cover is provided with a first connecting hole corresponding to the first piston rod, and the hole wall of the first connecting hole is provided with at least one sealing ring, the front cover is provided with a second connecting hole corresponding to the second piston rod, and the hole wall of the second connecting hole is provided with at least one sealing ring.

[0009] Preferably, the connecting channel includes an inflation tube disposed on the axis of the first piston rod, and the first piston rod is provided with a plurality of communication ports evenly distributed thereon, the communication ports being always disposed within the second inflation chamber.

[0010] Preferably, the first piston rod is fixed to the first piston by a fastening nut, and the second piston is fixed to the second piston rod by a fastening nut.

[0011] Preferably, the second piston includes an annular piston base ring, the end of which near the cylinder extends toward the middle cover to form an extended sealing end.

[0012] Preferably, the first piston and the second piston are provided with a sealing ring at the end near the cylinder.

[0013] Preferably, the diameter of the end of the second piston rod extending out of the cylinder housing is reduced to form a connecting end.

[0014] Beneficial effects:

[0015] 1. Simplified Control System: A unique single-port design allows for simultaneous air supply to both the first and second inflation chambers with just one port, eliminating the need for a complex dual-source control system. This design significantly reduces system complexity and cost, while avoiding the output force instability caused by asynchronous air sources in a dual-cylinder tandem structure, thus improving the equipment's operational reliability and stability.

[0016] 2. Compact Structural Design: This single-port force multiplier cylinder integrates two inflation chambers within a single cylinder housing. Through the ingenious connection between the middle cover and the piston rod, it achieves force amplification while avoiding the increased length and weight issues associated with traditional dual-cylinder tandem structures. This compact design makes the force multiplier cylinder more suitable for space-constrained applications, better meeting the demands of lightweight and miniaturized equipment.

[0017] 3. High-efficiency gas transmission: By setting a connecting channel in the first piston rod, gas can be directly transmitted from the first inflation chamber to the second inflation chamber, avoiding the additional energy loss of gas transmission in the traditional structure, improving gas utilization efficiency, and thus improving the overall working efficiency of the multiplier cylinder. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a structural diagram of the present invention after it has been moved. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with specific embodiments and the appendix, provides further details. Figure 1-2 The present invention will be described in further detail below. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the present invention.

[0021] This utility model provides a single-port force multiplier cylinder, whose structural design aims to achieve efficient force amplification while simplifying the control system and optimizing overall performance.

[0022] The cylinder housing consists of a front cover 1, a middle cover 4, and a rear cover 9. The front cover 1 and the middle cover 4 are connected by a cylinder barrel 2, and the middle cover 4 and the rear cover 9 are also connected by a cylinder barrel 2. This segmented design facilitates assembly and maintenance while ensuring the overall strength and sealing of the cylinder. The middle cover 4 has a first connecting hole corresponding to the first piston rod 6, and at least one sealing ring 11 is provided on the wall of the first connecting hole to prevent gas leakage. The front cover 1 has a second connecting hole corresponding to the second piston rod 14, and at least one sealing ring is also provided on the wall of the second connecting hole to ensure the sealing of the second piston rod 14 during operation.

[0023] A first piston 7 is fixedly mounted at the rear end of the first piston rod 6, forming a sealed first inflation chamber 10 between the first piston 7 and the rear cover 9 of the cylinder housing. The front end of the first piston rod 6 always passes through the middle cover 4 and connects to the rear end of the second piston rod 14. A second piston 15 is mounted at the rear end of the second piston rod 14, forming a sealed second inflation chamber between the second piston 15, the first piston rod 6, and the middle cover 4. The first piston rod 6 and the first piston 7 are fixed together by a fastening nut 13, and the second piston 15 and the second piston rod 14 are also fixed together by a fastening nut 13. This connection method ensures the connection strength and stability between the piston and the piston rod, avoiding loosening problems that may occur during long-term use.

[0024] The first piston rod 6 has a connecting channel that connects the first inflation chamber 10 and the second inflation chamber 12. The connecting channel includes an inflation pipe 5 positioned along the axis of the first piston rod 6. The first piston rod 6 has multiple evenly distributed connecting ports 3, which are always located within the second inflation chamber 12. When gas enters the first inflation chamber 10 through the inflation port 8 at the rear cover, it can smoothly enter the second inflation chamber 12 through the inflation pipe 5 and connecting ports 3 of the connecting channel, thus achieving simultaneous gas supply to both inflation chambers without the need for an additional gas source control system.

[0025] The second piston 15 includes an annular piston base ring, with one end of the piston base ring near the cylinder barrel extending towards the middle cover 4 to form an extended sealing end. This extended sealing end design further enhances the sealing performance of the second piston 15, effectively reducing the possibility of gas leakage. Simultaneously, both the first piston 6 and the second piston 14 have sealing rings at their ends near the cylinder barrel 2, further ensuring the sealing performance inside the cylinder and improving the working efficiency and reliability of the multiplier cylinder.

[0026] The diameter of the end of the second piston rod 14 extending out of the cylinder housing decreases to form a connecting end, which can be used to connect an external load or actuator, so as to facilitate the transmission of the thrust generated by the multiplier cylinder to the required location.

[0027] In use, the air source is connected through the air inlet on the rear cover, and the gas enters the first inflation chamber, pushing the first piston forward. Because the first piston rod has a connecting channel, the gas enters the second inflation chamber through the inflation pipe and connecting port, simultaneously pushing the second piston forward. At this time, the thrust of the first and second piston rods is superimposed, resulting in a large thrust at the output end of the multiplier cylinder. During operation, the sealing rings at the connection holes of the middle and front covers, as well as the sealing rings on the piston, ensure effective sealing of the gas within the inflation chamber, preventing leakage. The extended sealing end of the second piston further enhances the sealing effect, ensuring stable operation of the multiplier cylinder. When the work is completed, the air source is cut off, and the multiplier cylinder returns to its initial position under the action of the return spring (if any) or external load, ready for the next working cycle.

[0028] This invention achieves simultaneous air supply to two inflation chambers with only one inflation port, effectively simplifying the control system and avoiding the complex requirements of dual-air-source control. Integrating the two inflation chambers within a single cylinder housing significantly reduces the length and weight of the device, resulting in a more compact structure, particularly suitable for space-constrained applications. The connection channel design enables efficient gas transfer from the first to the second inflation chamber, minimizing energy loss. Simultaneously, a multi-seal design, including sealing rings at the connection holes of the middle and front covers, as well as a sealing ring on the piston, effectively prevents gas leakage, significantly improving the reliability and service life of the device. Furthermore, the extended sealing end design of the second piston further enhances the sealing effect, while the piston and piston rod are secured with a fastening nut, improving connection strength and stability. Overall, this single-port force multiplier cylinder features a simple structure and reliable performance, suitable for applications requiring significant thrust but with limited air source pressure, and has broad application prospects.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A single-port force multiplier cylinder, characterized in that, The cylinder includes a cylinder housing, a centrally sealed cover is provided in the middle of the cylinder housing, a first piston rod is slidably sealed on the central cover, a first piston is provided at the rear end of the first piston rod, a sealed first inflation chamber is formed between the first piston and the rear cover of the cylinder housing, an inflation port is provided at the rear cover, the front end of the first piston rod passes through the central cover and is connected to the rear end of a second piston rod, a second piston is provided at the rear end of the second piston rod, a sealed second inflation chamber is formed between the second piston and the central cover, and a connecting channel is provided in the first piston rod to connect the first inflation chamber and the second inflation chamber.

2. A single-port force multiplier cylinder according to claim 1, characterized in that, The cylinder housing includes a front cover, which is connected to a middle cover via a cylinder barrel. The middle cover is also connected to a rear cover via a cylinder barrel. The middle cover has a first connecting hole corresponding to the first piston rod, and at least one sealing ring is provided on the wall of the first connecting hole. The front cover has a second connecting hole corresponding to the second piston rod, and at least one sealing ring is provided on the wall of the second connecting hole.

3. A single-port force multiplier cylinder according to claim 1, characterized in that, The connection channel includes an inflation tube disposed on the axis of the first piston rod, and the first piston rod is provided with a plurality of communication ports evenly distributed thereon, the communication ports being always disposed within the second inflation chamber.

4. A single-port force multiplier cylinder according to claim 1, characterized in that, The first piston rod is fixed to the first piston by a fastening nut, and the second piston is fixed to the second piston rod by a fastening nut.

5. A single-port force multiplier cylinder according to claim 1, characterized in that, The second piston includes an annular piston base ring, the end of which near the cylinder extends toward the middle cover to form an extended sealing end.

6. A single-port force multiplier cylinder according to claim 1, characterized in that, The first piston and the second piston are provided with sealing rings at the ends near the cylinder.

7. A single-port force multiplier cylinder according to claim 1, characterized in that, The diameter of the end of the second piston rod extending out of the cylinder housing decreases to form a connecting end.

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