Gas spring inflation method and inflation apparatus

Abstract

The application discloses a gas spring inflating method and inflating equipment, and relates to the technical field of gas springs. The sealing workpiece is placed in the accommodating cavity of the upper die. The electromagnetic valve is converted to open the first through hole of the electromagnetic valve and close the second through hole of the electromagnetic valve. The first through hole and the second through hole are both communicated with the accommodating cavity, and the accommodating cavity is communicated with the outside through the second through hole. An opening is formed at the top end of the gas spring, and the top of the gas spring is inserted into the accommodating cavity from the socket at the bottom of the accommodating cavity until the top end of the gas spring abuts against the sealing workpiece and the gas spring seals the socket. Nitrogen is filled into the accommodating cavity from the first through hole, and the nitrogen is continuously filled into the accommodating cavity after the nitrogen fills the gas spring, and at the same time, the welding current is passed into the sealing workpiece and the gas spring to seal the opening and fuse the sealing workpiece and the gas spring. The nitrogen is continuously filled into the accommodating cavity during the process of sealing the opening, so that the nitrogen in the gas spring is prevented from leaking outward.

Description

Technical Field

[0001] This invention relates to the field of gas spring technology, and in particular to a gas spring inflation method and inflation device. Background Technology

[0002] A gas spring is an industrial component that provides support, cushioning, braking, height adjustment, and angle adjustment. During the production process, nitrogen is injected into the gas spring through the inflation port to achieve a predetermined internal pressure. The inflation port then needs to be sealed. However, current methods typically involve stopping inflation after completion and quickly inserting steel balls or needles through an interference fit into the inflation port to seal it. Since the pressure inside the gas spring is usually higher than the external pressure, gas leakage inevitably occurs during the sealing process, causing a drop in internal pressure and affecting the gas spring's performance. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a gas spring inflation method that can ensure the stability of the air pressure inside the gas spring during the sealing of the opening.

[0004] The present invention also proposes an inflation device using a gas spring inflation method.

[0005] According to a first aspect of the present invention, a gas spring inflation method includes the following steps: placing a sealing workpiece into a receiving cavity of an upper mold; switching a solenoid valve to open a first port of the solenoid valve and close a second port of the solenoid valve; wherein the first port and the second port are both connected to the receiving cavity, and the receiving cavity is connected to the outside through the second port; opening an opening at the top of the gas spring, inserting the top of the gas spring into the receiving cavity from the insertion port at the bottom of the receiving cavity until the top of the gas spring abuts against the sealing workpiece and the gas spring closes the insertion port; filling the receiving cavity with nitrogen from the first port, continuously filling the receiving cavity with nitrogen after the gas spring is full, and simultaneously passing welding current through the sealing workpiece and the gas spring to seal the opening and weld the sealing workpiece and the gas spring together; switching the solenoid valve to close the first port and open the second port.

[0006] The gas spring inflation method according to embodiments of the present invention has at least the following beneficial effects: the sealing workpiece is placed in the receiving cavity of the upper mold to fix the position of the sealing workpiece; the upper mold has a first port and a second port, both of which are connected to the receiving cavity, and the receiving cavity is connected to the outside through the second port; by switching the solenoid valve to open the first port and close the second port, the gas in the receiving cavity can be prevented from leaking from the second port; an opening is opened at the top of the gas spring, and the top of the gas spring is inserted into the receiving cavity from the insertion port, so that the opening can be connected to the receiving cavity; the top of the gas spring is pushed upward to abut against the sealing workpiece, and after the gas spring is inserted, the gas spring can seal the insertion port, so as to prevent the gas in the receiving cavity from leaking from the insertion port; Nitrogen gas is introduced into the receiving cavity through the first inlet, allowing nitrogen to be introduced into the gas spring through its opening. After the gas spring is full, nitrogen continues to be introduced into the receiving cavity to ensure that the gas pressure inside the gas spring matches the gas pressure inside the receiving cavity. During the continuous introduction of nitrogen into the receiving cavity, welding current is applied to the sealing workpiece and the gas spring. The welding current heats the sealing workpiece and the gas spring, causing the part of the gas spring with the opening to melt and seal the opening, thus fusing the sealing workpiece and the gas spring together. Because nitrogen is continuously introduced into the receiving cavity during the sealing process, the gas pressure inside the gas spring matches the gas pressure inside the receiving cavity, preventing nitrogen leakage from the gas spring and ensuring the stability of the gas pressure inside the gas spring during the sealing process.

[0007] According to some embodiments of the present invention, an opening is made at the top of the gas spring, and the top of the gas spring is inserted into the receiving cavity from the insertion port at the bottom of the receiving cavity until the top of the gas spring abuts against the sealing workpiece and the gas spring closes the insertion port. This includes the following steps: the upper mold moves upward; an opening is made at the top of the gas spring; the gas spring is clamped by two clamping members; the upper mold moves downward, so that the top of the gas spring is inserted into the receiving cavity from the insertion port until the top of the gas spring abuts against the sealing workpiece and the gas spring closes the insertion port.

[0008] According to some embodiments of the present invention, the clamping member is a welding lower electrode; nitrogen gas is introduced into the receiving cavity from the first port, and after the gas spring is filled with nitrogen gas, nitrogen gas is continuously introduced into the receiving cavity, while welding current is simultaneously introduced into the sealing workpiece and the gas spring to seal the opening and to weld the sealing workpiece and the gas spring together, comprising the following steps: introducing nitrogen gas into the receiving cavity from the first port, and after the gas spring is filled with nitrogen gas, nitrogen gas is continuously introduced into the receiving cavity; releasing welding current to the sealing workpiece through the welding upper electrode, and releasing welding current to the gas spring through the welding lower electrode to seal the opening, and performing fusion welding on the part of the gas spring in contact with the sealing workpiece; stopping the introduction of nitrogen gas.

[0009] According to some embodiments of the present invention, an opening is made at the top of the gas spring, and the top of the gas spring is inserted into the receiving cavity from the insertion port at the bottom of the receiving cavity until the top of the gas spring abuts against the sealing workpiece and the gas spring closes the insertion port; the method includes the following steps: making the opening at the center position of the top of the gas spring; wherein the top surface of the gas spring is an upwardly convex arc surface; making an inflation port at the edge of the opening; inserting the top of the gas spring into the receiving cavity from the insertion port of the receiving cavity and the gas spring sealing the insertion port; inserting the gas spring to the edge of the opening of the gas spring and abutting against the bottom of the sealing workpiece.

[0010] According to some embodiments of the present invention, nitrogen gas is introduced into the receiving cavity from the first port. After the gas spring is filled with nitrogen gas, nitrogen gas is continuously introduced into the receiving cavity, and welding current is simultaneously applied to the sealing workpiece and the gas spring to seal the opening and weld the sealing workpiece and the gas spring together. The method includes the following steps: introducing nitrogen gas into the receiving cavity from the first port for a predetermined time to fill the gas spring with nitrogen gas; continuing to introduce nitrogen gas into the receiving cavity from the first port for a pressure holding time, and applying welding current to the sealing workpiece and the gas spring during the pressure holding time to seal the opening and weld the sealing workpiece and the gas spring together.

[0011] According to some embodiments of the present invention, the top wall of the receiving cavity is provided with a limiting groove, the side wall surface of the limiting groove is inclined, the cross-section of the limiting groove gradually decreases in the vertically upward direction, two clamping members are provided and both can be slidably disposed in the limiting groove, the two clamping members are disposed opposite each other and spaced apart; placing the sealing workpiece into the receiving cavity of the upper mold includes the following steps: placing the sealing workpiece between the two clamping members.

[0012] An inflation device according to a second aspect of the present invention includes: a clamping assembly including a clamping drive, an upper mold, a welding upper electrode, and a welding lower electrode; the bottom of the upper mold is provided with a receiving cavity, and the welding upper electrode is disposed in the receiving cavity; two welding upper electrodes are provided, both located below the upper mold, the clamping drive is connected to the welding lower electrode, and is capable of driving the two welding lower electrodes to move closer to or further away from each other; an inflation assembly including an inflation component and a solenoid valve, the inflation component being capable of outputting nitrogen gas; the solenoid valve is respectively connected to the receiving cavity and the inflation component, so as to control the connection or closure of the inflation component and the receiving cavity.

[0013] The inflation device according to embodiments of the present invention has at least the following beneficial effects: the inflation device can be used to inflate a gas spring according to the gas spring inflation method of the first aspect embodiment described above. By placing the sealing workpiece into the receiving cavity of the upper mold, the position of the sealing workpiece can be fixed. An opening is made at the top of the gas spring, and the top of the gas spring is inserted into the receiving cavity from the insertion port, so that the opening can communicate with the receiving cavity. The top of the gas spring is pushed upward until it abuts against the sealing workpiece, and after the gas spring is inserted, the gas spring can seal the insertion port, so as to prevent gas in the receiving cavity from leaking from the insertion port. The inflation component and the receiving cavity can be interconnected by a solenoid valve, so that nitrogen can be injected into the receiving cavity from the first port through the inflation component, so as to inflate the nitrogen. Nitrogen is introduced into the gas spring through its opening. After the gas spring is full, nitrogen continues to be introduced into the receiving cavity to ensure that the gas pressure inside the gas spring matches the gas pressure inside the receiving cavity. During the continuous introduction of nitrogen into the receiving cavity, welding current is passed through the upper and lower welding electrodes to the sealing workpiece and the gas spring. The welding current heats the sealing workpiece and the gas spring, causing the part of the gas spring with the opening to melt and seal the opening, thus fusing the sealing workpiece and the gas spring together. Because nitrogen is continuously introduced into the receiving cavity during the sealing process, the gas pressure inside the gas spring matches the gas pressure inside the receiving cavity, preventing nitrogen leakage from the gas spring and ensuring the stability of the gas pressure inside the gas spring during the sealing process.

[0014] According to some embodiments of the present invention, a through groove is provided on the inner wall of the receiving cavity; the solenoid valve includes a vent ring, a baffle ring, a valve body, and a control rod; the valve body is provided with a first channel, a second channel, a third channel, and a fourth channel; three vent rings are provided, all disposed within the second channel, the three vent rings being the first vent ring, the second vent ring, and the third vent ring, respectively, arranged sequentially and spaced apart along the length of the second channel; multiple baffle rings are provided and respectively disposed on both sides of the three vent rings; the two ends of the first channel are respectively connected to the through groove and the fourth channel. The inner walls of the two channels are connected, and one end of the first channel is opposite to the second vent ring; both ends of the third channel are connected to the inner walls of the inflatable component and the second channel, respectively, and one end of the third channel is opposite to the first vent ring; both ends of the fourth channel are connected to the inner wall of the second channel and the outside, respectively, and one end of the fourth channel is opposite to the third vent ring; the control rod is slidably inserted through the first vent ring, the second vent ring, the third vent ring and the plurality of air-blocking rings, and the side of the control rod is provided with an annular groove, the length of which is greater than the distance between two adjacent vent rings.

[0015] According to some embodiments of the present invention, the device further includes a clamping member and an elastic member; the top wall of the receiving cavity is provided with a limiting groove, the side wall surface of the limiting groove is inclined, the cross-section of the limiting groove gradually decreases in the vertically upward direction, two clamping members are provided and both can be slidably disposed in the limiting groove, and a clamping space for accommodating the sealing workpiece is formed between the sides of the two clamping members; the elastic member is disposed in the limiting groove, and the upper end of the clamping member is connected to the elastic member.

[0016] According to some embodiments of the present invention, an annular sealing ring is provided at the bottom of the side wall of the receiving cavity.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of the inflation device of the present invention;

[0020] Figure 2 This is a cross-sectional view of the inflation device of the present invention;

[0021] Figure 3 This is a cross-sectional view of the solenoid valve of the inflation device of the present invention;

[0022] Figure 4 This is another cross-sectional view of the solenoid valve of the inflation device of the present invention;

[0023] Figure 5 This is a cross-sectional view of the upper mold of the inflation device of the present invention;

[0024] Figure 6 This is a schematic flowchart of the gas spring inflation method of the present invention.

[0025] Figure label:

[0026] 10. Sealing workpiece; 20. Gas spring; 100. Clamping assembly; 110. Upper mold; 111. Receiving cavity; 112. Through groove; 113. Welding lower pole; 120. Solenoid valve; 200. Valve body; 210. First channel; 211. Second channel; 212. Third channel; 213. Fourth channel; 214. Vent ring; 220. First vent ring; 221. Second vent ring; 222. Third vent ring; 223. Air barrier ring; 230. Control rod; 240. Annular groove; 300. Clamping component; 310. Elastic component; 400. Annular sealing ring. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, left, right, front, back, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0030] Reference Figures 1 to 6 According to a first aspect of the present invention, a gas spring inflation method includes the following steps:

[0031] S100, Place the sealing workpiece 10 into the receiving cavity 111 of the upper mold 110;

[0032] S200, switching solenoid valve 200 to open the first port of solenoid valve 200 and close the second port of solenoid valve 200; wherein, both the first port and the second port are connected to the receiving cavity 111, and the receiving cavity 111 is connected to the outside through the second port;

[0033] S300. An opening is made at the top of the gas spring 20. The top of the gas spring 20 is inserted into the receiving cavity 111 from the insertion port 113 at the bottom of the receiving cavity 111 until the top of the gas spring 20 abuts against the sealing workpiece 10 and the gas spring 20 closes the insertion port 113.

[0034] S400. Nitrogen gas is introduced into the receiving cavity 111 from the first port. After the gas spring 20 is filled with nitrogen gas, nitrogen gas is continuously introduced into the receiving cavity 111. At the same time, welding current is introduced into the sealing workpiece 10 and the gas spring 20 to seal the opening and to weld the sealing workpiece 10 and the gas spring 20 together.

[0035] S500, switch solenoid valve 200 to close the first port and open the second port.

[0036] The sealing workpiece 10 is placed into the receiving cavity 111 of the upper mold 110 to fix its position. The upper mold 110 has a first port and a second port, both of which communicate with the receiving cavity 111. The receiving cavity 111 is connected to the outside through the second port. The first port is opened and the second port is closed by a switching solenoid valve 200, thus preventing gas leakage from the receiving cavity 111 through the second port. An opening is made at the top of the gas spring 20. The top of the gas spring 20 is inserted into the receiving cavity 111 through the insertion port 113, allowing the opening to communicate with the receiving cavity 111. The top of the gas spring 20 is pushed upwards until it abuts against the sealing workpiece 10. Inserting the gas spring 20 seals the insertion port 113, preventing gas leakage from the receiving cavity 111 through the insertion port 113. Nitrogen gas is then introduced through the first port. Nitrogen gas is introduced into the receiving cavity 111 through the opening of the gas spring 20. After the gas spring 20 is filled with nitrogen, nitrogen continues to be introduced into the receiving cavity 111 to ensure that the gas pressure inside the gas spring 20 matches the gas pressure inside the receiving cavity 111. During the continuous introduction of nitrogen into the receiving cavity 111, welding current is passed through the sealing workpiece 10 and the gas spring 20. The welding current heats the sealing workpiece 10 and the gas spring 20, causing the part of the gas spring 20 with the opening to melt and seal the opening, and the sealing workpiece 10 and the gas spring 20 to fuse together. Because nitrogen is continuously introduced into the receiving cavity 111 during the sealing process, the gas pressure inside the gas spring 20 matches the gas pressure inside the receiving cavity 111, preventing nitrogen leakage from the gas spring 20 and ensuring the stability of the gas pressure inside the gas spring 20 during the sealing process.

[0037] Reference Figure 1 , Figure 2 and Figure 6 In some embodiments of the present invention, S300, an opening is made at the top of the gas spring 20, and the top of the gas spring 20 is inserted into the receiving cavity 111 from the insertion port 113 at the bottom of the receiving cavity 111 until the top of the gas spring 20 abuts against the sealing workpiece 10 and the gas spring 20 closes the insertion port 113, including the following steps:

[0038] The upper mold 110 moves upward;

[0039] An opening is made at the top of the gas spring 20;

[0040] The gas spring 20 is held by two clamping parts 300;

[0041] The upper mold 110 moves downward, so that the top of the gas spring 20 is inserted into the cavity 111 through the insertion port 113 until the top of the gas spring 20 abuts against the sealing workpiece 10 and the gas spring 20 seals the insertion port 113.

[0042] The clamping member 300 is located below the upper mold 110. By driving the upper mold 110 to move upward, a position for placing the gas spring 20 can be reserved. The clamping member 300 can fix and clamp the gas spring 20 to limit the position of the gas spring 20. The upper mold 110 moves downward to drive the gas spring 20 downward, so that the top of the gas spring 20 is inserted into the receiving cavity 111 from the insertion port 113 until the top of the gas spring 20 abuts against the sealing workpiece 10 and the gas spring 20 seals the insertion port 113, thereby reducing the possibility of gas leakage from the insertion port 113 in the receiving cavity 111.

[0043] Specifically, the position of the gas spring 20 can be fixed by two clamping members 300. The gas spring 20 is usually cylindrical. Each of the two clamping members 300 has a semi-circular groove at one end. The gas spring 20 is located in the semi-circular groove to improve the stability of clamping the gas spring 20.

[0044] Specifically, the upper mold 110 is driven to move downward by the up and down drive motor, so as to control the position of the upper mold 110 and the sealing workpiece 10, and to limit the position of the gas spring 20 inserted into the receiving cavity 111.

[0045] Reference Figure 1 , Figure 2 and Figure 6In some embodiments of the present invention, the clamping member 300 is the welding lower electrode 120; S400, nitrogen gas is filled into the receiving cavity 111 from the first port, and after the nitrogen gas fills the gas spring 20, nitrogen gas is continuously filled into the receiving cavity 111, while welding current is simultaneously passed into the sealing workpiece 10 and the gas spring 20 to seal the opening and to weld the sealing workpiece 10 and the gas spring 20 together, including the following steps:

[0046] Nitrogen gas is introduced into the receiving cavity 111 through the first port. After the gas spring 20 is filled with nitrogen gas, nitrogen gas is continuously introduced into the receiving cavity 111.

[0047] The welding current is released to the sealing workpiece 10 by welding the upper electrode, and the welding current is released to the gas spring 20 by welding the lower electrode 120 to seal the opening, and the part of the gas spring 20 that contacts the sealing workpiece 10 is fused welded.

[0048] Stop filling with nitrogen.

[0049] Nitrogen gas is introduced into the receiving cavity 111 through the first port. After the gas spring 20 is filled with nitrogen, nitrogen is continuously introduced into the receiving cavity 111 to maintain the gas pressure in the receiving cavity 111 and the gas spring 20. While nitrogen is continuously introduced into the receiving cavity 111, the upper welding electrode releases welding current to the sealing workpiece 10, and the lower welding electrode 120 releases welding current to the gas spring 20. Since the contact area between the sealing workpiece 10 and the gas spring 20 is small, the resistance of the contact area is high, resulting in a higher temperature at the contact area. Furthermore, due to the small aperture of the opening, the opening is melted and sealed, thereby closing the gas spring 20. After the welding is completed, the welding current is stopped, and the nitrogen supply is stopped to facilitate the removal of the gas spring 20.

[0050] Reference Figure 1 , Figure 2 and Figure 6 In some embodiments of the present invention, S300, an opening is made at the top of the gas spring 20, and the top of the gas spring 20 is inserted into the receiving cavity 111 from the insertion port 113 at the bottom of the receiving cavity 111 until the top of the gas spring 20 abuts against the sealing workpiece 10 and the gas spring 20 closes the insertion port 113, including the following steps:

[0051] An opening is made at the center of the top of the gas spring 20; wherein, the top surface of the gas spring 20 is an upwardly convex arc surface;

[0052] An air inlet is made at the edge of the opening;

[0053] Insert the top of the gas spring 20 into the receiving cavity 111 through the insertion port 113, and make the gas spring 20 block the insertion port 113;

[0054] Insert the gas spring 20 into the edge of the opening of the gas spring 20 and abut it against the bottom of the sealing workpiece 10.

[0055] Since the top surface of the gas spring 20 is an upwardly convex arc surface, by opening an opening at the center of the top of the gas spring 20, the abutment can abut against the part of the gas spring 20 with the opening. An inflation port is opened at the edge of the opening, and nitrogen in the receiving cavity 111 can enter the gas spring 20 from the inflation port. After welding, the gas spring 20 and the sealing workpiece 10 are welded together, and the sealing workpiece 10 can close the opening, so that the opening is isolated from the outside world, thereby sealing the opening. The gas spring 20 is heated by welding current to melt and block the inflation port.

[0056] Reference Figure 1 , Figure 2 and Figure 6 In some embodiments of the present invention, S400, nitrogen gas is introduced into the receiving cavity 111 from the first port. After the gas spring 20 is filled with nitrogen gas, nitrogen gas is continuously introduced into the receiving cavity 111, and welding current is simultaneously applied to the sealing workpiece 10 and the gas spring 20 to seal the opening and weld the sealing workpiece 10 and the gas spring 20 together. This includes the following steps:

[0057] Nitrogen gas is introduced into the receiving cavity 111 through the first port and continued for a predetermined time, so that the nitrogen gas fills the gas spring 20.

[0058] Nitrogen gas is continuously introduced into the receiving cavity 111 from the first port and the pressure is maintained for a period of time. During the pressure maintenance time, welding current is passed into the sealing workpiece 10 and the gas spring 20 to seal the opening and weld the sealing workpiece 10 and the gas spring 20 together.

[0059] Because nitrogen is introduced quickly, the gas spring 20 can be filled with nitrogen within a predetermined time. After the predetermined time, nitrogen continues to be continuously introduced into the receiving cavity 111, and the pressure is maintained for a sustained period, ensuring that the pressure inside the gas spring 20 remains stable. During the pressure holding period, welding current can be applied to the sealing workpiece 10 and the gas spring 20 to seal the opening and weld them together. Since the capacity of each gas spring 20 is approximately the same during assembly line production, by setting the predetermined time and the pressure holding time, nitrogen is continuously introduced into the receiving cavity 111 by the nitrogen pump within the predetermined time and the pressure holding time, eliminating the need to monitor the gas pressure inside the receiving cavity 111 and improving production efficiency. The predetermined time and the pressure holding time are specified in the original text.

[0060] Reference Figure 1 and Figure 5In some embodiments of the present invention, a limiting groove is provided on the top wall of the receiving cavity 111, the side wall surface of the limiting groove is inclined, the cross-section of the limiting groove gradually decreases in the vertical upward direction, and two clamping members 300 are provided, both of which are slidably disposed in the limiting groove, the two clamping members 300 are disposed opposite to each other and spaced apart.

[0061] S100, placing the sealing workpiece 10 into the receiving cavity 111 of the upper mold 110 includes the following steps:

[0062] Place the sealing workpiece 10 between the two clamping parts 300.

[0063] The position of the clamping member 300 can be limited by setting the limiting groove. The two clamping members 300 are arranged opposite each other and spaced apart, so that the sealing workpiece 10 can be placed between the two clamping members 300. The gas spring 20 extends into the receiving cavity 111 from below the upper mold 110 and moves upward, so that the top of the gas spring 20 abuts against the sealing workpiece 10 and continues to push the sealing workpiece 10 upward, so as to drive the clamping member 300 to move upward. Since the side wall of the limiting groove is inclined and the cross-section of the limiting groove gradually decreases in the vertical direction, after the clamping member 300 moves upward, the two adjacent clamping members 300 can slide up and down in the limiting groove, and the clamping member 300 can move along the side wall of the limiting groove, so that the two limiting grooves move toward each other, so as to clamp and position the sealing workpiece 10.

[0064] Specifically, an elastic member 310 is installed above the two clamping members 300. The elastic member 310 abuts against the top of the two clamping members 300 and can provide an elastic restoring force to the clamping members 300 as they move toward the lower part of the upper mold 110, so that the clamping members 300 can be reset.

[0065] Reference Figures 1 to 6 The inflation device according to a second aspect of the present invention includes a clamping assembly 100 and an inflation assembly; the clamping assembly 100 includes a clamping drive, an upper mold 110, a welding upper pole and a welding lower pole 120; the bottom of the upper mold 110 is provided with a receiving cavity 111, and the welding upper pole is disposed in the receiving cavity 111; there are two welding upper poles, both located below the upper mold 110, the clamping drive is connected to the welding lower pole 120 and can drive the two welding lower poles 120 to move closer or further apart; the inflation assembly includes an inflation component and a solenoid valve 200, the inflation component can output nitrogen gas; the solenoid valve 200 is respectively connected to the receiving cavity 111 and the inflation component, so as to control the connection or closure of the inflation component and the receiving cavity 111.

[0066] The inflation device can be used to inflate the gas spring 20 according to the gas spring inflation method of the first aspect embodiment described above. By placing the sealing workpiece 10 into the receiving cavity 111 of the upper mold 110 to fix the position of the sealing workpiece 10, an opening is made at the top of the gas spring 20. The top of the gas spring 20 is inserted into the receiving cavity 111 through the insertion port 113, so that the opening can communicate with the receiving cavity 111. The top of the gas spring 20 is pushed upwards until it abuts against the sealing workpiece 10. After the gas spring 20 is inserted, it seals the insertion port 113, preventing gas leakage from the receiving cavity 111 through the insertion port 113. The solenoid valve 200 allows the inflation component to communicate with the receiving cavity 111, enabling nitrogen gas to be injected into the receiving cavity 111 through the inflation component from the first port, and nitrogen gas to be released from the opening of the gas spring 20. Nitrogen is continuously injected into the gas spring 20. After the gas spring 20 is filled with nitrogen, nitrogen is continuously injected into the receiving cavity 111 to make the gas pressure in the gas spring 20 consistent with the gas pressure in the receiving cavity 111. During the continuous injection of nitrogen into the receiving cavity 111, welding current is passed into the sealing workpiece 10 and the gas spring 20 through the welding upper and welding lower electrodes 120. The welding current heats the sealing workpiece 10 and the gas spring 20, causing the part of the gas spring 20 with an opening to melt and seal the opening, and the sealing workpiece 10 and the gas spring 20 to fuse together. Because nitrogen is continuously injected into the receiving cavity 111 during the sealing process, the gas pressure in the gas spring 20 is consistent with the gas pressure in the receiving cavity 111, so as to prevent the nitrogen in the gas spring 20 from leaking out and ensure the stability of the gas pressure in the gas spring 20 during the sealing process.

[0067] Reference Figures 2 to 4In some embodiments of the present invention, a through groove 112 is provided on the inner wall of the receiving cavity 111; the solenoid valve 200 includes a vent ring 220, a baffle ring 230, a valve body 210, and a control rod 240; the valve body 210 is provided with a first channel 211, a second channel 212, a third channel 213, and a fourth channel 214; three vent rings 220 are provided, all of which are disposed within the second channel 212, the three vent rings 220 being a first vent ring 221, a second vent ring 222, and a third vent ring 223, which are arranged sequentially and spaced apart along the length of the second channel 212; multiple baffle rings 230 are provided and are respectively disposed on both sides of the three vent rings 220; the two sides of the first channel 211 The first channel 211 is connected to the inner wall of the through groove 112 and the second channel 212 respectively. One end of the first channel 211 is opposite to the second vent ring 222. The two ends of the third channel 213 are connected to the inner wall of the inflation component and the second channel 212 respectively. One end of the third channel 213 is opposite to the first vent ring 221. The two ends of the fourth channel 214 are connected to the inner wall of the second channel 212 and the outside respectively. One end of the fourth channel 214 is opposite to the third vent ring 223. The control rod 240 is slidably inserted through the first vent ring 221, the second vent ring 222, the third vent ring 223 and multiple air-blocking rings 230. The side of the control rod 240 is provided with an annular groove 241. The length of the annular groove 241 is greater than the distance between two adjacent vent rings 220.

[0068] By moving the control lever 240, its position can be adjusted, thereby controlling the position of the annular groove 241. Since the length of the annular groove 241 is greater than the distance between two adjacent vent rings 220, the control lever 240 is moved until the annular groove 241 is located on one side of the first vent ring 221 and the second vent ring 222. This allows the annular groove 241 to connect the first channel 211, the second channel 212, and the third channel 213. Furthermore, the control lever 240 and the air-blocking ring 230 can separate the first channel 211 and the fourth channel 214, allowing the inflation component to introduce gas from the third channel 213 into the second channel 212, which then enters the annular groove. The gas flows into the groove and out from the first channel 211 to enter the receiving cavity 111; the control lever 240 is moved until the annular groove 241 is located on one side of the third vent ring 223 and the second vent ring 222, so that the first channel 211, the second channel 212 and the fourth channel 214 can be connected through the annular groove 241, and the control lever 240 and the air baffle ring 230 can separate the first channel 211 and the third channel 213 from each other, so that the gas in the receiving cavity 111 can enter the second channel 212 from the third channel 213 to enter the annular groove, and flow out from the fourth channel 214, so that the gas in the receiving cavity 111 can be discharged to the outside.

[0069] Specifically, the inner wall of the air baffle and the outer wall of the control rod 240 abut against the inner wall of the air baffle to reduce the degree of nitrogen leakage and improve the airtightness.

[0070] Specifically, the first port is located at one end of the third channel 213, the second port is located at one end of the fourth channel 214, and the first channel 211 is always connected to the receiving cavity 111.

[0071] Reference Figure 5 In some embodiments of the present invention, a clamping member 300 and an elastic member 310 are also included; a limiting groove is provided on the top wall of the receiving cavity 111, the side wall surface of the limiting groove is inclined, the cross-section of the limiting groove gradually decreases in the vertically upward direction, two clamping members 300 are provided and both can be slidably disposed in the limiting groove, and a clamping space for accommodating the sealing workpiece 10 is formed between the sides of the two clamping members 300; the elastic member 310 is disposed in the limiting groove, and the upper end of the clamping member 300 is connected to the elastic member 310.

[0072] The position of the clamping member 300 can be limited by setting the limiting groove. The two clamping members 300 are arranged opposite each other and spaced apart, so that the sealing workpiece 10 can be placed between the two clamping members 300. The gas spring 20 extends into the receiving cavity 111 from below the upper mold 110 and moves upward, so that the top of the gas spring 20 abuts against the sealing workpiece 10 and continues to push the sealing workpiece 10 upward, so as to drive the clamping member 300 to move upward. Since the side wall of the limiting groove is inclined and the cross-section of the limiting groove gradually decreases in the vertical direction, after the clamping member 300 moves upward, the two adjacent clamping members 300 can slide up and down in the limiting groove, and the clamping member 300 can move along the side wall of the limiting groove, so that the two limiting grooves move toward each other, so as to clamp and position the sealing workpiece 10.

[0073] Specifically, an elastic element 310 is installed above the two clamping members 300. The elastic element 310 is connected to the top of the two clamping members 300 and can provide an elastic restoring force to the clamping members 300 as they move toward the lower part of the upper mold 110, so that the clamping members 300 can be reset. The two clamping members 300 are in the shape of a semi-frustum, so that the two clamping members 300 as a whole can be in the shape of a frustum.

[0074] Reference Figure 2 In some embodiments of the present invention, an annular sealing ring 400 is provided at the bottom of the side wall of the receiving cavity 111.

[0075] After the gas spring 20 is inserted into the receiving cavity 111 from the bottom, the outer wall of the gas spring 20 abuts against the annular sealing ring 400, so as to reduce the degree of nitrogen leakage from the receiving cavity 111 between the gas spring 20 and the annular sealing ring 400, thereby improving the airtightness of the receiving cavity 111.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0077] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A method for inflating a gas spring, characterized in that, Includes the following steps: Place the sealing workpiece into the receiving cavity of the upper mold; The solenoid valve is switched to open the first port of the solenoid valve and close the second port of the solenoid valve; wherein both the first port and the second port are connected to the receiving cavity, and the receiving cavity is connected to the outside through the second port; An opening is made at the top of the gas spring, and the top of the gas spring is inserted into the receiving cavity from the insertion port at the bottom of the receiving cavity until the top of the gas spring abuts against the sealing workpiece and the gas spring closes the insertion port. Nitrogen gas is introduced into the receiving cavity through the first inlet. After the gas spring is filled with nitrogen gas, nitrogen gas is continuously introduced into the receiving cavity. At the same time, welding current is applied to the sealing workpiece and the gas spring to seal the opening and weld the sealing workpiece and the gas spring together. Switch the solenoid valve to close the first port and open the second port; in, The inner wall of the receiving cavity is provided with a through groove; the solenoid valve includes a vent ring, a baffle ring, a valve body, and a control rod; the valve body is provided with a first channel, a second channel, a third channel, and a fourth channel; three vent rings are provided, all of which are located in the second channel, and the three vent rings are respectively the first vent ring, the second vent ring, and the third vent ring, which are arranged sequentially and spaced apart along the length of the second channel; multiple baffle rings are provided and are respectively located on both sides of the three vent rings; both ends of the first channel are respectively connected to the through groove and the inner side wall of the second channel, and one end of the first channel is opposite to the second vent ring; the third channel... The two ends of the third channel are respectively connected to the inflation component for outputting nitrogen and the inner wall of the second channel; one end of the third channel is opposite to the first vent ring; the two ends of the fourth channel are respectively connected to the inner wall of the second channel and the outside; one end of the fourth channel is opposite to the third vent ring; the control rod is slidably inserted through the first vent ring, the second vent ring, the third vent ring and multiple air-blocking rings; the side of the control rod is provided with an annular groove, the length of which is greater than the distance between two adjacent vent rings; the first opening is provided at one end of the third channel, the second opening is provided at one end of the fourth channel, and the first channel is always connected to the receiving cavity; The position of the annular groove is controlled by moving the control lever; the control lever is moved until the annular groove is located on one side of the first vent ring and one side of the second vent ring, so that the first channel, the second channel and the third channel can be connected through the annular groove, and the first channel and the fourth channel can be separated from each other by the control lever and the air-blocking ring, so that the inflation member can allow gas to enter the second channel from the third channel, enter the annular groove, and flow out from the first channel to enter the receiving cavity; the control lever is moved until the annular groove is located on one side of the third vent ring and one side of the second vent ring, so that the first channel, the second channel and the fourth channel can be connected through the annular groove, and the first channel and the third channel can be separated from each other by the control lever and the air-blocking ring, so that the gas in the receiving cavity can enter the second channel from the third channel, enter the annular groove, and flow out from the fourth channel, so that the gas in the receiving cavity can be discharged to the outside.

2. The gas spring inflation method according to claim 1, characterized in that, An opening is made at the top of the gas spring, and the top of the gas spring is inserted into the receiving cavity from the insertion port at the bottom of the receiving cavity until the top of the gas spring abuts against the sealing workpiece, thereby closing the insertion port. This includes the following steps: The upper mold moves upward; An opening is made at the top of the gas spring; The gas spring is held by two clamping members; The upper mold moves downward, causing the top of the gas spring to be inserted into the cavity from the insertion port until the top of the gas spring abuts against the sealing workpiece, thus sealing the insertion port.

3. The gas spring inflation method according to claim 2, characterized in that, The clamping element is a welding lower electrode; nitrogen gas is injected into the receiving cavity through the first port, and after the gas spring is filled with nitrogen gas, nitrogen gas is continuously injected into the receiving cavity, while welding current is simultaneously applied to the sealing workpiece and the gas spring to seal the opening and weld the sealing workpiece and the gas spring together, including the following steps: Nitrogen gas is introduced into the receiving cavity through the first inlet. After the gas spring is filled with nitrogen gas, nitrogen gas is continuously introduced into the receiving cavity. The welding current is released to the sealing workpiece through the upper welding electrode and to the gas spring through the lower welding electrode to seal the opening, and the part of the gas spring in contact with the sealing workpiece is fused and welded. Stop filling with nitrogen.

4. The gas spring inflation method according to claim 1, characterized in that, An opening is made at the top of the gas spring, and the top of the gas spring is inserted into the receiving cavity from the insertion port at the bottom of the receiving cavity until the top of the gas spring abuts against the sealing workpiece, thereby closing the insertion port. This includes the following steps: The opening is made at the center of the top end of the gas spring; wherein the top end surface of the gas spring is an upwardly convex arc surface; An air inlet is made at the edge of the opening; Insert the top of the gas spring into the receiving cavity through the insertion port, and make the gas spring block the insertion port; The gas spring is inserted into the edge of the opening of the gas spring and abuts against the bottom of the sealing workpiece.

5. The gas spring inflation method according to claim 1, characterized in that, Nitrogen gas is introduced into the receiving cavity through the first inlet. After the gas spring is filled with nitrogen, nitrogen gas is continuously introduced into the receiving cavity, while welding current is simultaneously applied to the sealing workpiece and the gas spring to seal the opening and weld the sealing workpiece and the gas spring together. This includes the following steps: Nitrogen gas is introduced into the receiving cavity through the first port and continued for a predetermined time until the gas spring is filled with nitrogen. Nitrogen gas continues to be introduced into the cavity through the first port and maintained at pressure for a specified time. During the pressure holding time, welding current is passed through the sealing workpiece and the gas spring to seal the opening and weld the sealing workpiece and the gas spring together.

6. The gas spring inflation method according to claim 2, characterized in that, The top wall of the receiving cavity is provided with a limiting groove, the side wall of the limiting groove is inclined, the cross-section of the limiting groove gradually decreases in the vertical upward direction, and two clamping members are provided, both of which are slidably disposed in the limiting groove. The two clamping members are arranged with their sides facing each other and spaced apart. The process of placing the sealing workpiece into the receiving cavity of the upper mold includes the following steps: The sealing workpiece is placed between the two clamping members.

7. An inflation device, characterized in that, include: A clamping assembly includes a clamping drive, an upper mold, a welding upper electrode, and a welding lower electrode; the bottom of the upper mold has a receiving cavity, and the welding upper electrode is disposed within the receiving cavity; there are two welding upper electrodes, both located below the upper mold; the clamping drive is connected to the welding lower electrode and can drive the two welding lower electrodes to move closer or further apart; an inflation assembly includes an inflation component and a solenoid valve; the inflation component can output nitrogen gas; the solenoid valve is connected to both the receiving cavity and the inflation component, respectively, to control the connection or closure of the inflation component and the receiving cavity; The cavity has a through groove on its inner wall; the solenoid valve includes a vent ring, a baffle ring, a valve body, and a control rod; the valve body has a first channel, a second channel, a third channel, and a fourth channel; three vent rings are provided, all located within the second channel, and are designated as a first vent ring, a second vent ring, and a third vent ring, arranged sequentially and spaced apart along the length of the second channel; multiple baffle rings are provided on either side of the three vent rings; the two ends of the first channel are respectively connected to the through groove and the inner wall of the second channel. The system is configured with the following connections: one end of the first channel is positioned opposite to the second vent ring; both ends of the third channel are connected to the inner walls of the inflatable component and the second channel, respectively, with one end of the third channel opposite to the first vent ring; both ends of the fourth channel are connected to the inner wall of the second channel and the outside, respectively, with one end of the fourth channel opposite to the third vent ring; a control rod is slidably inserted through the first vent ring, the second vent ring, the third vent ring, and multiple air-blocking rings; the side of the control rod is provided with an annular groove, the length of which is greater than the distance between two adjacent vent rings.

8. The inflation device according to claim 7, characterized in that, It also includes clamping components and elastic components; the top wall of the receiving cavity is provided with a limiting groove, the side wall surface of the limiting groove is inclined, the cross-section of the limiting groove gradually decreases in the vertical upward direction, two clamping components are provided and both can be slidably disposed in the limiting groove, and a clamping space for accommodating the sealing workpiece is formed between the sides of the two clamping components; the elastic component is disposed in the limiting groove, and the upper end of the clamping component is connected to the elastic component.

9. The inflation device according to claim 7, characterized in that, An annular sealing ring is provided at the bottom of the side wall of the receiving cavity.

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