Patent No.:CN201487112U Date:2009-06-15

Google Patent: https://patents.google.com/patent/CN201487112U/en?oq=CN201487112U

China Patent: http://epub.cnipa.gov.cn/

Abstract
This utility model relates to a lockable gas spring with a rigid compression direction. It includes a cylinder, a guide sealing sleeve, a rear seal, a piston, and a piston rod. The front end of the cylinder is welded with a guide sealing sleeve, and the inner chamber connects to a piston. The end is fixed with a rear seal. The piston rod passes through the guide sealing sleeve to connect with the piston. Between the guide sealing sleeve and the piston, the piston rod is equipped with a floating piston. Nitrogen is filled between the floating piston and the guide sealing sleeve, while liquid oil is filled between the floating piston and the rear seal. By filling liquid oil between the floating piston and the rear seal, compressed liquid oil fills the bottom end of the piston during compression, achieving rigidity in the compression direction, thereby expanding the application range of the gas spring.

Description
A Lockable Gas Spring with a Rigid Compression Direction

Technical Field This utility model relates to a gas spring, specifically a lockable gas spring with a rigid compression direction.

Background Technology Lockable gas springs are widely used and their functionality is becoming increasingly diverse. Traditional gas springs exhibit a soft compression direction, limiting their application range.

Utility Model Content The technical problem this utility model aims to solve is to provide a lockable gas spring with a rigid compression direction.

To solve the above technical problems, the utility model provides the following technical solution: a lockable gas spring with a rigid compression direction, comprising a cylinder, a guide sealing sleeve, a rear seal, a piston, and a piston rod. The front end of the cylinder is welded with a guide sealing sleeve, and the inner chamber connects to a piston. The end is fixed with a rear seal. The piston rod connects to the piston. The innovation lies in: the inner chamber of the cylinder is connected with a floating piston, which divides the cylinder into front and rear chambers. The front chamber is filled with nitrogen, and the rear chamber is filled with liquid oil. The piston is located in the rear chamber filled with liquid oil.

Advantages of the Utility Model By filling liquid oil between the floating piston and the rear seal, compressed liquid oil fills the bottom end of the piston during compression, achieving rigidity in the compression direction, thereby expanding the application range of the gas spring.

Description of Drawings

The figure is a schematic diagram of the structure of the lockable gas spring with a rigid compression direction.

Detailed Implementation As shown in the figure, it includes a cylinder 1, a rear seal 2, a guide sealing sleeve 3, a floating piston 6, nitrogen 10, a piston 4, a piston rod 5, a valve needle 8, an activation rod 9, and liquid oil 7.

The front end of the cylinder 1 is welded with a guide sealing sleeve 3, and the end is fixed with a rear seal 2. The inner chamber connects with a floating piston 6, which divides the inner chamber of the cylinder 1 into front and rear chambers. The front chamber is filled with nitrogen 10, and the rear chamber is filled with liquid oil 7.

The piston 4 is connected in the rear chamber filled with liquid oil 7. The specific structure is: the top end of the piston 4 is connected to the piston rod 5, which passes through the guide sealing sleeve 3. The inner chamber connects to a valve needle 8, which is connected to the activation rod 9 that passes through the piston rod 5.

During the operation of the lockable gas spring with a rigid compression direction, under the action of external force, the piston rod 5, activation rod 9, and piston 4 move downward. The activation rod 9 opens the valve needle 8, and the liquid oil 7 at the bottom end of the piston 4 flows above the piston 4, pushing the floating piston 6 and compressing the nitrogen 10 in the front chamber of the cylinder 1. At any position, closing the valve needle 8 locks the piston rod 5 and stops its movement. Since there is a portion of liquid oil 7 in the sealed space between the piston 4 and the rear seal 2, and the liquid oil in the sealed space is rigid, it achieves rigidity in the compression direction of the lockable gas spring, expanding the application range of the gas spring.

Claims (1) – Lockable Gas Spring with a Rigid Compression Direction, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacturer

1. A lockable gas spring with a rigid compression direction, comprising a cylinder, a guide sealing sleeve, a rear seal, a piston, and a piston rod. The front end of the cylinder is welded with a guide sealing sleeve, and the inner chamber connects to a piston. The end is fixed with a rear seal. The piston rod connects to the piston. It is characterized by: the inner chamber of the cylinder is connected with a floating piston, which divides the cylinder into front and rear chambers. The front chamber is filled with nitrogen, and the rear chamber is filled with liquid oil. The piston is located in the rear chamber filled with liquid oil.