Gas spring capable of adjusting damping force

Abstract

The utility model discloses a gas spring with adjustable damping force, which comprises a shell, a piston rod, a built-in piston and a guide frame, the piston rod is arranged in the shell, the bottom end of the piston rod is fixedly connected with the built-in piston, the guide frame is arranged on the outer side of the piston rod, and the guide frame is fixedly connected with the top of the shell. According to the gas spring capable of adjusting the damping force, by rotating the adjusting plate, the adjusting plate drives the limiting piece to rotate and rise in the limiting chamber, the space below the adjusting piston is enlarged, the damping force of downward pressing of the built-in piston is reduced, and when the gas spring is installed on an office chair, the gas spring is suitable for a user with light weight; meanwhile, when the adjusting plate is rotated to drive the adjusting piston to descend, the space below the adjusting piston is reduced, the damping force of downward pressing of the built-in piston is increased, and when the air spring is installed on an office chair, the air spring is suitable for a heavy user.

Description

Technical Field

[0001] The utility model relates to the technical field of gas springs, in particular to a gas spring with adjustable damping force. Background Art

[0002] When the gas spring acts on the office chair, its damping force cannot be adjusted, which affects the use of the office chair in different situations.

[0003] The main reason for this is that when the gas spring acts on the office chair, the weight of the office chair users varies greatly. For heavier users, the gas spring damping force needs to be appropriately increased so that the chair does not suddenly drop due to the heavy weight when they sit down or adjust the seat height. However, for lighter users, if the damping force is too large, it may become difficult to adjust the chair. Therefore, the damping force needs to be adjusted according to the actual user's actual situation. Utility Model Content

[0004] The purpose of the present invention is to provide a gas spring with adjustable damping force, so as to solve the problem in the above background art that the user of the office chair cannot adjust the damping force of the gas spring according to his own weight.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a gas spring with adjustable damping force, comprising an outer shell, a piston rod, a built-in piston and a guide frame, a piston rod is provided inside the outer shell, the bottom end of the piston rod is fixedly connected to the built-in piston, a guide frame is provided on the outer side of the piston rod, and the guide frame is fixedly connected to the top of the outer shell, an adjustment frame is fixedly connected to one side of the outer shell, the main air chamber inside the adjustment frame is connected to the main air chamber inside the outer shell through a connecting hole, an adjustment rod is inserted in the main air chamber inside the adjustment frame, the bottom end of the adjustment rod is fixedly connected to the adjustment piston, the top end of the adjustment rod is fixedly connected to the adjustment plate, the adjustment plate is located outside the adjustment frame, a limit chamber is provided above the main air chamber of the adjustment frame, and a limit member is provided inside the limit chamber.

[0006] Preferably, the center of the limit member is penetrated by the adjusting rod, and the limit member and the adjusting rod are fixedly connected. At the same time, an internal thread is provided inside the limit chamber, an external thread is provided on the outside of the limit member, and the limit member is threadedly connected to the inner wall of the limit chamber.

[0007] Preferably, two circles of first sealing rings are provided on the outer side of the built-in piston, two circles of second sealing rings are provided on the outer side of the regulating piston, and similarly, a sealing ring frame is provided between the top of the main air chamber of the regulating frame and the regulating frame.

[0008] Preferably, the bottom end of the shell is fixedly connected to a mounting connector, and the top end of the piston rod is fixedly connected to a mounting connector.

[0009] Preferably, the guide frame is penetrated by the piston rod, a sealing ring frame is provided at the bottom of the guide frame, and the inner side of the sealing ring frame is fitted on the piston rod.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0011] The utility model provides a gas spring with adjustable damping force, which adjusts the rise and fall of the adjusting piston by rotating the adjusting plate, and further adjusts the size of the space in the adjusting frame below the adjusting piston. When the space in the adjusting frame below the adjusting piston becomes smaller, the damping force of the built-in piston pressing down is increased. When the gas spring is installed on an office chair, it is suitable for users with heavier weight. When the space in the adjusting frame below the adjusting piston becomes larger, the damping force of the built-in piston pressing down is reduced, and it is suitable for users with lighter weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a side view of the entire utility model;

[0013] Figure 2 A cross-sectional view of the utility model as a whole;

[0014] Figure 3 This is a schematic diagram of the adjustment of the built-in piston of the utility model.

[0015] In the figure: 1. outer shell; 2. piston rod; 3. built-in piston; 31. first sealing ring; 4. guide frame; 5. adjustment frame; 51. adjustment rod; 52. adjustment piston; 53. second sealing ring; 54. adjustment plate; 55. limit member; 56. limit chamber; 6. connecting hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0017] See also Figure 1-3, a gas spring with adjustable damping force, including an outer shell 1, a piston rod 2, a built-in piston 3 and a guide frame 4. A piston rod 2 is provided inside the outer shell 1, and the bottom end of the piston rod 2 is fixedly connected to the built-in piston 3. A guide frame 4 is provided on the outside of the piston rod 2, and the guide frame 4 is fixedly connected to the top of the outer shell 1. An adjusting frame 5 is fixedly connected to one side of the outer shell 1. The main air chamber inside the adjusting frame 5 is connected to the main air chamber inside the outer shell 1 through a connecting hole 6. An adjusting rod 51 is inserted in the main air chamber inside the adjusting frame 5, and the bottom end of the adjusting rod 51 is fixedly connected to the adjusting piston 52. When the mounting connector at the top of the piston rod 2 transmits pressure downward, the built-in piston 31 compresses the main air chamber in the outer shell 1. When the adjusting piston 52 is fixed and seals the adjusting frame 5, the piston rod 2 supports the top of the mounting connector, and the adjusting The top end of the rod 51 is fixedly connected to an adjusting plate 54, which is located outside the adjusting frame 5. A limit chamber 56 is provided above the main air chamber of the adjusting frame 5, and a limit member 55 is provided inside the limit chamber 56. When it is necessary to adjust the supporting strength of the piston rod 2, that is, to adjust the damping force of the built-in piston 3 pressing down, the adjusting plate 54 is rotated, and the adjusting plate 54 drives the limit member 55 to rotate and rise in the limit chamber 56, thereby expanding the space under the adjusting piston 52 and reducing the damping force of the built-in piston 3 pressing down. When the gas spring is installed on an office chair, it is suitable for users with lighter weight. Similarly, when the adjusting plate 54 is rotated to drive the adjusting piston 52 to descend, the space under the adjusting piston 52 is reduced, and the damping force of the built-in piston 3 pressing down is increased. When the gas spring is installed on an office chair, it is suitable for users with heavier weight.

[0018] Furthermore, the center of the limit member 55 is penetrated by the adjusting rod 51, and the limit member 55 and the adjusting rod 51 are fixedly connected. At the same time, an internal thread is provided inside the limit chamber 56, and an external thread is provided on the outside of the limit member 55. The limit member 55 and the inner wall of the limit chamber 56 are threadedly connected.

[0019] Furthermore, two circles of first sealing rings 31 are provided on the outside of the built-in piston 3, and two circles of second sealing rings 53 are provided on the outside of the regulating piston 52. Similarly, a sealing ring frame is provided between the top of the main air chamber of the regulating frame 5 and the regulating frame 5.

[0020] Furthermore, the bottom end of the housing 1 is fixedly connected to a mounting connector, and the top end of the piston rod 2 is fixedly connected to a mounting connector, and the upper and lower parts are fixedly connected via the mounting connector.

[0021] Furthermore, the guide frame 4 is penetrated by the piston rod 2 , and a sealing ring frame is provided at the bottom of the guide frame 4 , and the inner side of the sealing ring frame is in contact with the piston rod 2 .

[0022] Working principle: The utility model is a gas spring with adjustable damping force. When in use, when the mounting connector at the top of the piston rod 2 transmits pressure downward, the built-in piston 31 compresses the main air chamber in the outer shell 1. When the adjusting piston 52 is fixed and the adjusting frame 5 is sealed, the piston rod 2 supports the top of the mounting connector. When it is necessary to adjust the supporting strength of the piston rod 2, the damping force of the downward pressure of the built-in piston 3 is adjusted. By rotating the adjusting plate 54, the adjusting plate 54 drives the limit piece 55 to rotate and rise in the limit chamber 56, thereby expanding the space under the adjusting piston 52 and reducing the damping force of the downward pressure of the built-in piston 3. When the gas spring is installed on an office chair, it is suitable for users with lighter weight. Similarly, when the adjusting plate 54 is rotated to drive the adjusting piston 52 to descend, the space under the adjusting piston 52 is reduced, and the damping force of the downward pressure of the built-in piston 3 is increased. When the gas spring is installed on an office chair, it is suitable for users with heavier weight.

Claims

1. A gas spring with adjustable damping force, comprising a housing (1), a piston rod (2), a built-in piston (3) and a guide frame (4), wherein the housing (1) is provided with a piston rod (2), the bottom end of the piston rod (2) is fixedly connected to the built-in piston (3), the outer side of the piston rod (2) is provided with a guide frame (4), and the guide frame (4) is fixedly connected to the top of the housing (1), characterized in that: An adjusting frame (5) is fixedly connected to one side of the housing (1); a main air chamber inside the adjusting frame (5) is connected to a main air chamber inside the housing (1) via a connecting hole (6); an adjusting rod (51) is inserted into the main air chamber inside the adjusting frame (5); the bottom end of the adjusting rod (51) is fixedly connected to an adjusting piston (52); the top end of the adjusting rod (51) is fixedly connected to an adjusting plate (54); the adjusting plate (54) is located outside the adjusting frame (5); a limiting chamber (56) is provided above the main air chamber of the adjusting frame (5); a limiting member (55) is provided inside the limiting chamber (56).

2. The gas spring with adjustable damping force according to claim 1, characterized in that: The center of the limiting member (55) is penetrated by the adjusting rod (51), and the limiting member (55) and the adjusting rod (51) are fixedly connected. At the same time, an internal thread is provided inside the limiting chamber (56), and an external thread is provided outside the limiting member (55). The limiting member (55) and the inner wall of the limiting chamber (56) are threadedly connected.

3. The gas spring with adjustable damping force according to claim 1, characterized in that: Two first sealing rings (31) are provided on the outer side of the built-in piston (3), and two second sealing rings (53) are provided on the outer side of the regulating piston (52). Similarly, a sealing ring frame is provided between the top of the main air chamber of the regulating frame (5) and the regulating frame (5).

4. The gas spring with adjustable damping force according to claim 1, characterized in that: The bottom end of the housing (1) is fixedly connected to a mounting connector, and the top end of the piston rod (2) is fixedly connected to a mounting connector.

5. The gas spring with adjustable damping force according to claim 1, characterized in that: The guide frame (4) is penetrated by the piston rod (2), and a sealing ring frame is provided at the bottom of the guide frame (4), and the inner side of the sealing ring frame is fitted on the piston rod (2).

Images