Unidirectional rigid lockable gas spring

Abstract

The utility model relates to the technical field of gas springs, in particular to a one-way rigid lockable gas spring, which overcomes the defects of a gas spring in the prior art and comprises a cylinder barrel, a floating piston is slidably connected in the cylinder barrel and divides the inside of the cylinder barrel into two cavities, a valve needle is arranged in the cylinder barrel, and the valve needle is connected with the floating piston. A sealing gasket is arranged in the cylinder barrel, the sealing gasket and the structural end face of the valve needle are sealed and rigidly locked in a one-way mode, a piston rod is arranged on one side in the cylinder barrel, and a control rod is arranged in the piston rod.

Description

Technical Field

[0001] The utility model relates to the technical field of gas springs, in particular to a unidirectional rigid lockable gas spring. Background Art

[0002] Currently, bus seats use long-gauge lockable gas springs, which have great locking force when under pressure and tension. Due to safety considerations, airplane seats need to have both a strong locking function when under pressure and the ability to stretch, reset and absorb shock when impacted, so some improvements are needed to the gas springs.

[0003] In the existing patent publication number CN213685066U, a bidirectional rigid controllable gas spring is disclosed, including a cylinder body, a piston and an isolation piston assembly are arranged in the cylinder body, a piston rod is connected to the piston, the other end of the piston rod passes through the isolation piston assembly and extends out of the front end of the cylinder body and is connected to an adjusting nut, a guide sleeve is arranged at the front end of the cylinder body, an air cavity is formed between the guide sleeve and the isolation piston assembly, a spacer sleeve is arranged in the air cavity, an L-shaped seal is arranged between the spacer sleeve and the guide sleeve, a tail plug is arranged at the rear end of the cylinder body, the two sides of the piston respectively form a left oil cavity and a right oil cavity with the floating piston assembly and the isolation piston assembly, a switch push rod is inserted on the piston rod, a channel coaxial with the switch push rod is arranged in the piston, an overflow hole connecting the right oil cavity and the channel is arranged on the piston, a valve core is arranged in the channel, and the valve core is connected to the piston through the valve core sealing assembly. This gas spring cannot be modified by the structure of the piston head valve, so that the ordinary lockable gas spring can obtain the effect of shock absorption and locking when stretched outward when locked, and its practicality is general.

[0004] Therefore, it is necessary to design a one-way rigid lockable gas spring that is more practical and stable. Utility Model Content

[0005] The purpose of the utility model is to provide a one-way rigid lockable gas spring to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a one-way rigid lockable gas spring, comprising a cylinder, a floating piston slidably connected to the inside of the cylinder, the floating piston divides the inside of the cylinder into two chambers, the two chambers include a high-pressure air chamber and an oil chamber, a valve needle is arranged inside the cylinder, a sealing gasket is arranged inside the cylinder, the structural end faces of the sealing gasket and the valve needle are sealed and one-way rigidly locked, a piston rod is arranged on one side of the inside of the cylinder, and a control rod is arranged inside the piston rod.

[0007] According to the above technical solution, the two chambers include a high-pressure air chamber and an oil chamber 1, and a groove is provided on one side of the floating piston, wherein the oil chamber 1 is located on a side close to the groove.

[0008] According to the above technical solution, a pair of O-rings are provided on one side of the piston rod, the O-rings are fitted with the valve needle, one end of the valve needle extends into the interior of the piston rod and fits with the clearance of the inner wall of the piston rod.

[0009] According to the above technical solution, one end of the control rod corresponds to the end of the valve needle, wherein the control rod is in contact with the inner wall of the piston rod and is slidably connected.

[0010] According to the above technical solution, a guide sleeve is arranged inside the cylinder, and the guide sleeve is slidably connected to the surface of the piston rod.

[0011] According to the above technical solution, an external connecting piece is sleeved on the periphery of the piston rod.

[0012] Compared with the prior art, the beneficial effects achieved by the utility model are:

[0013] (1) Through the one-way rigid locking of the structural end face seal provided with a sealing gasket and a valve needle, after the control rod is released, the valve needle closes the oil chamber 1 and the oil chamber 2 to separate them, and the piston rod can be stopped at the required position. When the piston rod is under pressure at this time, a larger locking force can be obtained. When the piston rod is subjected to tensile impact force, the oil pressure at the front end of the piston rod becomes high, and the valve instantly opens the oil resistance buffer to absorb the impact force. The valve needle opens and connects the oil chamber 1 and the oil chamber 2. At this time, the piston rod can be pulled out. When the tensile force is cancelled, the valve needle closes the gas spring to lock it, which solves the problem of having a large locking function when required and being able to stretch, reset and absorb shock when subjected to impact, making the gas spring work more stable.

[0014] (2) A guide sleeve is provided to ensure that the piston rod can slide horizontally and prevent oil leakage in the oil chamber due to angle deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the utility model;

[0016] In the figure: 1. Cylinder; 2. Floating piston; 3. Piston head; 4. Sealing gasket; 5. Valve needle; 6. Sealing element; 7. Guide sleeve; 8. Piston rod; 9. Control rod; 10. External connection; 11. Oil chamber 1; 12. Oil chamber 2; 13. High-pressure air chamber. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1The utility model provides a technical solution: a one-way rigid lockable gas spring, including a cylinder 1, a floating piston 2 is slidably connected inside the cylinder 1, the floating piston 2 divides the inside of the cylinder 1 into two chambers, the two chambers include a high-pressure gas chamber 13 and an oil chamber 11, a valve needle 5 is arranged inside the cylinder 1, a sealing gasket 4 is arranged inside the cylinder 1, the structural end face sealing of the sealing gasket 4 and the valve needle 5 is one-way rigidly locked, a piston rod 8 is arranged on one side inside the cylinder 1, and a control rod 9 is arranged inside the piston rod 8.

[0019] Specifically, the one-way rigid locking of the gas spring can provide support during the extension or compression process, but maintain a locked state during the opposite process. After the control rod 9 is pressed in to open the valve needle 5, the oil chamber 1 11 and the oil chamber 2 12 are connected. When the piston rod 8 is pressed into the cylinder, the floating piston 2 moves to one side. When the control rod 9 is released, the valve needle 5 closes the oil chamber 1 11 and the oil chamber 2 12 to separate them, and the piston rod 8 can be stopped at the required position. When the piston rod 8 is under pressure at this time, a larger locking force can be obtained. When the piston rod 8 is subjected to a tensile impact force, the oil pressure at the front end of the piston rod 8 becomes high, and the valve instantly opens the oil resistance buffer to absorb the impact force. The valve needle 5 opens to connect the oil chamber 1 11 and the oil chamber 2 12. At this time, the piston rod 8 can be pulled out. When the tensile force is canceled, the valve needle 5 closes the gas spring and locks it, which solves the problem of having a large locking function when pressed and being able to stretch, reset and absorb shock when impacted, making the gas spring work more stable. The gas spring can only be extended and retracted in one direction, which helps to control the specific movement direction of the equipment, provides stable and solid support, and is suitable for bearing larger loads.

[0020] A groove is provided on one side of the floating piston 2, wherein the oil chamber 11 is located on the side close to the groove.

[0021] Specifically, Figure 1 The left side of the floating piston 2 is set as a high-pressure air chamber 13, and the right side is set as an oil chamber 11. The oil chamber 11 on the right side can be connected and coordinated with the oil chamber 2 12 as the valve needle 5 and the piston head 3 are displaced. During the movement of the piston, the pressure potential energy of the gas in the high-pressure air chamber 13 is stored. Once the external force is released, the stored energy will be released through the piston in the form of thrust. The structure is stable and the effect is significant.

[0022] A pair of O-rings are provided on one side of the piston rod 8 , and the O-rings fit the valve needle 5 . One end of the valve needle 5 extends into the interior of the piston rod 8 and fits with the inner wall of the piston rod 8 in a clearance.

[0023] Specifically, the O-ring fits tightly against the valve needle 5 to prevent the oil in the second oil chamber 12 from flowing into the inner wall gap of the piston rod 8 , thereby avoiding affecting the movement coordination between the control rod 9 and the valve needle 5 .

[0024] One end of the control rod 9 corresponds to the end of the valve needle 5 , wherein the control rod 9 is in contact with the inner wall of the piston rod 8 and is slidably connected thereto.

[0025] Specifically, Figure 1 The control rod 9 corresponds to the position of the valve needle 5, so that the control rod 9 can accurately push the valve needle to move, and the control rod 9 is fitted and slidably connected with the inside of the piston rod 8, which plays a certain guiding role.

[0026] A guide sleeve 7 is provided inside the cylinder 1 , and the guide sleeve 7 is slidably connected to the surface of the piston rod 8 .

[0027] Specifically, the guide sleeve 7 is used to ensure that the piston rod 8 can slide horizontally to prevent the oil chamber from leaking due to angle deviation.

[0028] The piston rod 8 is sleeved with an external connection piece on its periphery.

[0029] Specifically, the external connection member is used to stabilize the piston rod and the control rod 9 so that they can maintain horizontal movement during sliding displacement.

[0030] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A one-way rigid lockable gas spring, comprising a cylinder (1), characterized in that: A floating piston (2) is slidably connected to the inside of the cylinder (1), and the floating piston (2) divides the inside of the cylinder (1) into two chambers. The two chambers include a high-pressure air chamber (13) and an oil chamber (11). A valve needle (5) is arranged inside the cylinder (1), and a sealing gasket (4) is arranged inside the cylinder (1). The end faces of the sealing gasket (4) and the valve needle (5) are fitted and sealed, and the two are unidirectionally rigidly locked. A piston rod (8) is arranged on one side of the inside of the cylinder (1), and a control rod (9) is arranged inside the piston rod (8).

2. The one-way rigid lockable gas spring according to claim 1, characterized in that: A groove is provided on one side of the floating piston (2), wherein the oil chamber 1 (11) is located on the side close to the groove.

3. The one-way rigid lockable gas spring according to claim 1, characterized in that: A pair of O-rings are provided on one side of the piston rod (8), and the O-rings are fitted with the valve needle (5). One end of the valve needle (5) extends into the interior of the piston rod (8) and is gap-fitted with the inner wall of the piston rod (8).

4. The one-way rigid lockable gas spring according to claim 1, characterized in that: One end of the control rod (9) corresponds to the end of the valve needle (5), wherein the control rod (9) is in contact with the inner wall of the piston rod (8) and is slidably connected thereto.

5. The one-way rigid lockable gas spring according to claim 1, characterized in that: A guide sleeve (7) is arranged inside the cylinder (1), and the guide sleeve (7) is slidably connected to the surface of the piston rod (8).

6. The one-way rigid lockable gas spring according to claim 1, characterized in that: The piston rod (8) is sleeved with an external connection piece on its periphery.

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