Patent No.:CN205896005U Date:2016-08-23

Google Patent: https://patents.google.com/patent/CN205896005U/en?oq=CN205896005U

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

Abstract:

The utility model relates to a compressed gas spring with floating vibration damping, which includes a cylinder body, a guide seal crimped at the right end port of the cylinder body, a piston rod installed inside the cylinder body, a piston assembly mounted at the left end of the piston rod, and a floating piston installed within the cylinder body. The utility model achieves vibration or shock absorption through a buffer chamber, improves processability via a concave surface, and employs a lapped piston, pressure plate, and valve plate. It has good processability and is easy to manufacture.

Description

Title: Compressed Gas Spring with Floating Vibration Damping

Technical Field: The utility model relates to a compressed gas spring with floating vibration damping.

Background Technology: Currently, compressed gas springs have a single structure and lack cushioning and damping effects, resulting in a short service life that affects the lifespan and precision of related equipment. Additionally, the piston structure is complex and costly to process.

Content of the Utility Model: The technical problem to be solved by this utility model is to provide a compressed gas spring with floating vibration damping that is reasonably designed, compact in structure, and easy to use. To solve the above problems, the technical solution adopted by this utility model includes: A compressed gas spring with floating vibration damping, including a cylinder body, a guide seal crimped at the right end port of the cylinder body, a piston rod installed inside the cylinder body, a piston assembly mounted at the left end of the piston rod, and a floating piston installed within the cylinder body; In the cylinder body: the floating piston is located on the left side of the piston assembly, forming a rod chamber between the piston assembly and the guide seal, a non-rod chamber between the piston assembly and the floating piston, and a buffer chamber between the floating piston and the left end of the cylinder body.

Further Improvements to the Technical Solution:

• A second seal ring that makes sealing contact with the inner wall of the cylinder body is set on the outer side wall of the floating piston.
• A concave surface is set on the side end face of the floating piston.
• The piston assembly includes a lapped piston mounted on the piston rod, two pressure plates, and two valve plates;
• The two valve plates are installed between the two pressure plates, and the lapped piston is installed between the two valve plates.
• A first seal ring that makes sealing contact with the inner wall of the cylinder body is set on the outer side wall of the lapped piston.
• At least one vent hole, connecting the rod chamber and the non-rod chamber, is set on the lapped piston.
• End face notches are set on both side end faces of the lapped piston, with the bottom of the notches connecting to the corresponding vent hole.
• A right connector is connected to the right end of the piston rod; the cylinder body is filled with inert gas or nitrogen.
• A left connector is connected to the left end of the cylinder body.

Beneficial Effects: This utility model can meet the requirements of gas springs with damping functions on both sides, especially achieving damping suspension at the end of compression. Therefore, a floating piston is used to isolate part of the original gas chamber into an independent gas chamber filled with inert gas. The amount of gas is calculated according to the user’s required suspension effect, achieving the desired suspension damping effect by adding an airbag at the compression end of the gas spring. First, inject a fixed amount of inert gas for suspension damping from the left connector end of the gas spring, then perform conventional compression inflation from the gap between the piston rod and the guide seal and the cylinder body, and test the calculated force value of the gas spring as usual. This utility model achieves vibration or shock absorption through the buffer chamber, improves processability via the concave surface, and employs a lapped piston, pressure plate, and valve plate. It has good processability and is easy to manufacture.

Description of Drawings:

• Figure 1 is a structural schematic diagram of the utility model.
• Figure 2 is a structural schematic diagram of the lapped piston of the utility model.

Where:

1. Piston Rod
2. Cylinder Body
3. Guide Seal
4. Rod Chamber
5. Piston Assembly
6. Pressure Plate
7. Valve Plate
8. First Seal Ring
9. Lapped Piston
10. Non-Rod Chamber
11. Buffer Chamber
12. Left Connector
13. Floating Piston
14. Concave Surface
15. Second Seal Ring
16. End Face Notch
17. Vent Hole

Specific Implementation Method: As shown in Figures 1-2, this embodiment of the compressed gas spring with floating vibration damping includes a cylinder body (2), a guide seal (3) crimped at the right end port of the cylinder body (2), a piston rod (1) installed inside the cylinder body (2), a piston assembly (5) mounted at the left end of the piston rod (1), and a floating piston (13) installed within the cylinder body (2); In the cylinder body (2): the floating piston (13) is located on the left side of the piston assembly (5), forming a rod chamber (4) between the piston assembly (5) and the guide seal (3), a non-rod chamber (10) between the piston assembly (5) and the floating piston (13), and a buffer chamber (11) between the floating piston (13) and the left end of the cylinder body (2).

• A second seal ring (15) that makes sealing contact with the inner wall of the cylinder body (2) is set on the outer side wall of the floating piston (13).
• A concave surface (14) is set on the side end face of the floating piston (13).
• The piston assembly (5) includes a lapped piston (9) mounted on the piston rod (1), two pressure plates (6), and two valve plates (7);
• The two valve plates (7) are installed between the two pressure plates (6), and the lapped piston (9) is installed between the two valve plates (7).
• A first seal ring (8) that makes sealing contact with the inner wall of the cylinder body (2) is set on the outer side wall of the lapped piston (9).
• At least one vent hole (17), connecting the rod chamber (4) and the non-rod chamber (10), is set on the lapped piston (9).
• End face notches (16) are set on both side end faces of the lapped piston (9), with the bottom of the notches (16) connecting to the corresponding vent hole (17).
• A right connector is connected to the right end of the piston rod (1); the cylinder body (2) is filled with inert gas or nitrogen.

This utility model can meet the requirements of gas springs with damping functions on both sides, especially achieving a damping suspension effect at the end of compression. Therefore, a floating piston (13) is used to isolate part of the original gas chamber into an independent gas chamber filled with inert gas. The amount of gas is calculated according to the user’s required suspension effect, achieving the desired suspension damping effect by adding an airbag at the compression end of the gas spring. First, a fixed amount of inert gas for suspension damping is injected from the left connector (12) end of the gas spring, then conventional compression inflation is performed from the gap between the piston rod (1) and the guide seal (3) and the cylinder body (2), and the calculated force value of the gas spring is tested as usual. This utility model achieves vibration or shock absorption through the buffer chamber (11), improves processability via the concave surface (14), and employs a lapped piston (9), pressure plate (6), and valve plate (7). It has good processability and is easy to manufacture.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, not to limit them; although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the above embodiments, or make some technical features equivalent replacements; it is obvious for those skilled in the art to combine multiple technical solutions of this utility model. These modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the utility model embodiments.

Claims (9) – Compressed Gas Spring with Floating Vibration Damping, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacture

A compressed gas spring with floating vibration damping, characterized by: Including a cylinder body (2), a guide seal (3) crimped at the right end port of the cylinder body (2), a piston rod (1) installed inside the cylinder body (2), a piston assembly (5) mounted at the left end of the piston rod (1), and a floating piston (13) installed within the cylinder body (2); Within the cylinder body (2): the floating piston (13) is located on the left side of the piston assembly (5), forming a rod chamber (4) between the piston assembly (5) and the guide seal (3), a non-rod chamber (10) between the piston assembly (5) and the floating piston (13), and a buffer chamber (11) between the floating piston (13) and the left end of the cylinder body (2).

The compressed gas spring with floating vibration damping according to claim 1, characterized by: A second seal ring (15) that makes sealing contact with the inner wall of the cylinder body (2) is set on the outer side wall of the floating piston (13).

The compressed gas spring with floating vibration damping according to claim 1, characterized by: A concave surface (14) is set on the side end face of the floating piston (13).

The compressed gas spring with floating vibration damping according to any one of claims 1-3, characterized by: The piston assembly (5) includes a lapped piston (9) mounted on the piston rod (1), two pressure plates (6), and two valve plates (7); The two valve plates (7) are installed between the two pressure plates (6), and the lapped piston (9) is installed between the two valve plates (7).

The compressed gas spring with floating vibration damping according to claim 4, characterized by: A first seal ring (8) that makes sealing contact with the inner wall of the cylinder body (2) is set on the outer side wall of the lapped piston (9).

The compressed gas spring with floating vibration damping according to claim 5, characterized by: At least one vent hole (17) connecting the rod chamber (4) and the non-rod chamber (10) is set on the lapped piston (9).

The compressed gas spring with floating vibration damping according to claim 6, characterized by: End face notches (16) are set on both side end faces of the lapped piston (9), with the bottom of the notches (16) connecting to the corresponding vent hole (17).

The compressed gas spring with floating vibration damping according to claim 7, characterized by: A right connector is connected to the right end of the piston rod (1); the cylinder body (2) is filled with inert gas or nitrogen.

The compressed gas spring with floating vibration damping according to claim 8, characterized by: