Vacuum attracting and pressure regulation pneumatic cylinder

Abstract

The invention discloses a vacuum attracting and pressure regulation pneumatic cylinder. The vacuum attracting and pressure regulation pneumatic cylinder includes a pneumatic cylinder. The pneumatic cylinder is internally provided with a fixing isolation plate. A piston piece is arranged in the fixing isolation plate in a sliding mode. The center of the piston piece is provided with an air sealingpiston. The tail end of the piston piece is provided with a second air sealing piston. In this way, the interior of the pneumatic cylinder is composed of three air chambers and the air chambers are connected with a sleeving tube. When displacement of the piston piece occurs, the piston piece is matched with the flow of the air flow to be in and out of the pneumatic cylinder, so that the sizes of the air chambers can be adjusted corresponding spaces. Changing of sizes of the air chambers is used to vacuummize the sleeving tube, so that a stump and a prosthesis can suck with each other closely.Weight sense of the prosthesis during walking is greatly reduced, and in this way, matched with a user and in walking action, pressure balance of each air chamber is achieved and natural stability isachieved. A channel inside the piston piece is further provided with a floating piston and an airflow reduction screw. The airflow in the third air chamber can be adjusted to be reduced and dischargedsuitably. In this way, besides the fact that the user can obtain power to walk quickly, and the using safety can be retained.

Description

technical field [0001] The present invention is a cushioning pneumatic cylinder, especially a vacuum suction and pressure regulating pneumatic cylinder applied to buffer pressure of artificial limb joints. The size of the air chamber allows the vacuum degree of the sleeve to be adjusted accordingly, making the user's fast walking posture more relaxed and natural, and it is also safe. Background technique [0002] With the development of medicine and the improvement of medical practice and technology, the use of pneumatic cylinders on prosthetic joints is a fairly common design. However, the common pneumatic cylinders are usually tailored to the user's body shape according to the user's installation needs. , usage habits, comfort and many other details are fine-tuned, so that users can achieve the best experience when wearing it. [0003] When the user wants to walk quickly, the internal buffer gas pressure of the pneumatic cylinder is not enough to achieve the purpose of wa...

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Problems solved by technology

[0005] However, although the aforementioned adjustment-free cushioning air cylinder has many improvements, relative to different users, the center of gravity, speed, and applicable area (general flat ground, stairs, climbing, etc.) of its walking force are different. Mountain roads), etc., if only relying on a single product with an air supply volume greater than the exhaust volume, it cannot be perfectly applied to all users

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