Nitrogen gas spring with controllable delayed rebound

Abstract

The present invention discloses a nitrogen spring with controllable delayed rebound, comprising: a cylinder, a dust cover, a pressure sensing structure, a contact ring assembly, a piston structure, an airflow circuit assembly, and a controller assembly; an upper partition is provided inside the cylinder; the pressure sensing structure comprises a piezoelectric sheet, a positive conductive sheet, a negative conductive sheet, and an insulating gasket; the contact ring is provided on the upper part of the cylinder; the airflow circuit assembly is provided on the outside of the cylinder, the connecting pipe 1 and the connecting pipe 2 are respectively connected to the airflow circuit assembly, and the airflow circuit assembly comprises a shell and an airflow regulating structure; the controller assembly is provided on the outside of the cylinder, the controller assembly is connected to the pressure sensing structure and the airflow circuit assembly; an L-shaped control air groove is provided on the side of the upper partition away from the air guide groove 1, one end of the L-shaped control air groove passes through the cylinder and is internally threaded with a sealing column. The present invention has a simple structure and can achieve controllable delayed rebound.

Description

Technical Field

[0001] The present invention relates to the technical field of nitrogen springs, in particular to a nitrogen spring with controllable delayed rebound. Background Art

[0002] Nitrogen springs are manufactured by injecting high-pressure nitrogen into a sealed cylinder and using the reaction force of the nitrogen as a spring. Due to their precision manufacturing and gentle elastic curve, they can perform tasks that metal springs cannot, leading to their widespread application, particularly in technical fields such as mold manufacturing. Existing techniques typically slot the center and edges of the piston rod to create an airflow loop. This structure increases the difficulty of piston rod manufacturing and requires very high machining precision. Furthermore, the hollow center of the piston rod reduces its strength. Furthermore, existing techniques require combining multiple nitrogen springs into a spring pack to achieve delayed rebound and zero rebound control. Summary of the Invention

[0003] The object of the present invention is to provide a nitrogen spring with controllable delayed rebound to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a nitrogen spring with controllable delayed rebound, comprising:

[0005] The cylinder body has an upper open structure, an upper partition is provided inside the cylinder body, an air guide groove 1 is provided on the lower side of the upper partition, an air guide groove 3 is provided on one side of the upper partition, the air guide groove 3 is connected to the air guide groove 1, and one end of the air guide groove 3 is connected to the connecting pipe 2;

[0006] The lower part of the cylinder is provided with a second air guide groove, one end of which is provided with an air charging valve, and the end of the second air guide groove away from the air charging valve is connected to the first connecting pipe, and the lower side of the cylinder is provided with an air inlet, which is connected to the second air guide groove;

[0007] A dust cover is provided on the inner upper portion of the cylinder body, and a snap ring is sleeved on the outer side of the dust cover;

[0008] A pressure sensing structure for sensing pressure and converting the pressure signal into an electrical signal, the pressure sensing structure comprising a piezoelectric sheet, a positive conductive sheet, a negative conductive sheet, and an insulating spacer, the positive conductive sheet and the negative conductive sheet being connected to the upper and lower surfaces of the piezoelectric sheet, respectively, and the insulating spacer being disposed on the upper portion of the piezoelectric sheet;

[0009] A contact ring assembly cooperates with the pressure sensing structure and is used to transmit the electrical signal converted by the pressure sensing structure to the controller. The contact ring is arranged on the upper part of the cylinder;

[0010] A piston structure is disposed inside the cylinder, comprising a piston disc, a piston rod disposed on the upper portion of the piston disc, a guide ring and multiple oil seals sleeved on the outer side of the piston disc, wherein the upper portion of the piston rod sequentially passes through the upper partition plate, the dust cover, and the contact ring;

[0011] An airflow circuit assembly is used to form a gas passage outside the cylinder. The airflow circuit assembly is arranged on the outside of the cylinder. The first connecting pipe and the second connecting pipe are respectively connected to the airflow circuit assembly. The airflow circuit assembly includes a housing and an airflow regulating structure.

[0012] a controller assembly for receiving signals from the pressure sensing structure and controlling the airflow loop assembly, wherein the controller assembly is disposed outside the cylinder and connected to the pressure sensing structure and the airflow loop assembly;

[0013] An L-shaped air control groove is provided on one side of the upper partition away from the air guide groove. One end of the L-shaped air control groove passes through the cylinder and a sealing column is connected to the inner thread thereof.

[0014] Preferably, an annular groove is provided on the upper part of the piston rod, and electric plate grooves are provided on both sides of the piston rod respectively. The surface of the electric plate groove and the surface of the annular groove are respectively sprayed with insulating coatings. The piezoelectric plate is arranged in the annular groove, and the positive conductive plate and the negative conductive plate are respectively arranged in the corresponding electric plate grooves.

[0015] Preferably, the contact ring assembly includes a pressure cover, a limiting groove, a positive conductive block, a negative conductive block and a connecting female terminal. The pressure cover is arranged on the upper part of the cylinder, the limiting groove is opened in the middle part of the pressure cover, the positive conductive block and the negative conductive block are respectively arranged on the inner surface of the limiting groove, the positive conductive block abuts against the positive conductive sheet, the negative conductive block abuts against the negative conductive sheet, the connecting female terminal is arranged on one side of the pressure cover, and the positive conductive block and the negative conductive block are respectively connected to the connecting female terminal.

[0016] Preferably, two one-way valves are provided inside the piston disc.

[0017] Preferably, the airflow regulation structure includes solenoid valve 1, solenoid valve 2, air guide pipe 1 and manual regulating valve, the air guide pipe 1 is arranged inside the shell, the two ends of the air guide pipe 1 are respectively connected to solenoid valve 1 and solenoid valve 2, the manual regulating valve is connected to air guide pipe 1, one end of the manual regulating valve passes through the shell, the connecting pipe 2 is connected to solenoid valve 1, and the connecting pipe 1 is connected to solenoid valve 2.

[0018] Preferably, the controller assembly includes a controller, a battery and a connecting male terminal that cooperates with the connecting female terminal. The controller is connected to the battery, and the connecting male terminal is connected to the controller. The controller and the battery are arranged inside the shell, and the connecting male terminal passes through the shell. The solenoid valve 1 and the solenoid valve 2 are respectively connected to the controller.

[0019] Preferably, the airflow regulating structure includes a solenoid valve three, an air duct two and an air pressure sensor, one end of the air duct two is connected to the solenoid valve three, the air pressure sensor is arranged in the air duct two, the connecting tube two is connected to the solenoid valve three, the connecting tube one penetrates into the outer shell and is connected to the air duct two, and the solenoid valve three and the air pressure sensor are respectively connected to the controller.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, when pressure acts on the upper part of the piston rod, the piezoelectric piece senses the pressure and converts the pressure signal into an electrical signal, which is transmitted to the controller. The controller keeps solenoid valve 1 and solenoid valve 2 closed. When the pressure on the upper part of the piston rod is removed, due to the different force areas of the upper and lower parts of the piston disc, the piston rod rebounds a small amount and then stops. When the pressure on the piezoelectric piece disappears, no electrical signal is transmitted to the controller. The controller controls solenoid valve 1 and solenoid valve 2 to open according to the set delay time, the air pressure is restored to balance, and the piston rod moves upward. The length of the delay is achieved by controlling the lag time of opening of solenoid valve 1 and solenoid valve 2. By controlling the closure of solenoid valve 1 and / or solenoid valve 2, the movement of the piston rod can be paused at any time, thereby achieving controllable delayed rebound.

[0022] 2. In some scenarios where piston rod rebound is prohibited, the present invention can remove the sealing column and connect an external air control device through the L-shaped control air groove. The external air control device is used to inflate the cylinder, and the solenoid valves 1 and 2 are opened with a delayed timer to achieve the effect of keeping the piston disc stationary and preventing rebound.

[0023] 3. In some embodiments of the present invention, the installation of a one-way valve is eliminated, reducing the difficulty of processing the piston disc. The gas flow between the rod part and the rodless part is achieved through the airflow adjustment structure. When the piston rod is forced to move downward, the controller senses an electrical signal. At the same time, the air pressure sensor detects the air pressure signal and transmits it to the controller. The controller controls the solenoid valve three to open, and the nitrogen from the rodless part enters the rod part through the bottom air guide groove two, the air guide pipe two, the air guide groove three and the air guide groove one. When the pressure value reaches the set value, the solenoid valve is closed. When the external pressure is withdrawn, the piston rod will rebound a little and then remain stationary. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of the explosion structure in Example 1 of the present invention;

[0026] Figure 3 For the present invention Figure 1 Schematic diagram of the front structure;

[0027] Figure 4 For the present invention Figure 1 Schematic diagram of the top view structure;

[0028] Figure 5 For the present invention Figure 4 AA direction cross-sectional view;

[0029] Figure 6 For the present invention Figure 4 CC direction cross-sectional view;

[0030] Figure 7 This is a schematic diagram of the overall structure of the second embodiment of the present invention;

[0031] Figure 8 For the present invention Figure 7 Schematic diagram of the top view structure;

[0032] Figure 9 for Figure 8 BB direction cross-sectional view;

[0033] Figure 10 This is a module connection diagram of the present invention.

[0034] In the figure: cylinder 1, dust cover 2, pressure sensing structure 3, contact ring assembly 4, piston structure 5, air flow circuit assembly 6, controller assembly 7, upper partition 8, air guide groove 1 9, air guide groove 3 10, connecting pipe 2 11, air guide groove 2 12, charging valve 13, connecting pipe 1 14, air inlet 15, L-shaped control air groove 16, one-way valve 17, piezoelectric piece 31, positive conductive piece 32, negative conductive piece 33, insulating gasket 34, pressure cover 41, limiting groove 42, positive conductive block 43, negative conductive block 44, connecting female terminal 45, piston disc 51, piston rod 52, housing 61, air flow adjustment structure 62, solenoid valve 1 621, solenoid valve 2 622, air guide pipe 1 623, manual regulating valve 624, solenoid valve 3 6210, air guide pipe 2 6220, air pressure sensor 6230, connecting male terminal 74. DETAILED DESCRIPTION

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0036] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.

[0038] Example 1

[0039] See also Figure 1-6 The present invention provides a technical solution: a nitrogen spring with controllable delayed rebound, comprising: a cylinder 1, a dust cover 2, a pressure sensing structure 3, a contact ring assembly 4, a piston structure 5, an airflow circuit assembly 6, a controller assembly 7 and an upper partition 8.

[0040] The cylinder 1 has an open structure at the top, and an upper partition 8 is installed inside the cylinder 1. An air guide groove 9 is provided on the lower side of the upper partition 8, and an air guide groove 3 10 is provided on one side of the upper partition 8. The air guide groove 3 10 is connected to the air guide groove 9, and one end of the air guide groove 3 10 is connected to a connecting pipe 2 11; an air guide groove 2 12 is provided at the lower part of the cylinder 1, and an inflation valve 13 is installed at one end of the air guide groove 2 12, and a connecting pipe 14 is connected to the end of the air guide groove 2 12 away from the inflation valve 13, and an air inlet 15 is provided on the lower side of the cylinder 1, and the air inlet 15 is connected to the air guide groove 2 12; an L-shaped control air groove 16 is installed on the side of the upper partition 8 away from the air guide groove 9, and one end of the L-shaped control air groove 16 passes through the cylinder 1 and a sealing column is connected to its internal thread.

[0041] The dust cover 2 is installed on the inner upper part of the cylinder 1, and a snap ring is provided on the outer side of the dust cover 2;

[0042] The pressure sensing structure 3 is used to sense pressure and convert the pressure signal into an electrical signal. The pressure sensing structure 3 includes a piezoelectric sheet 31, a positive conductive sheet 32, a negative conductive sheet 33 and an insulating gasket 34. The positive conductive sheet 32 ​​and the negative conductive sheet 33 are respectively connected to the upper and lower surfaces of the piezoelectric sheet 31, and the insulating gasket 34 is installed on the upper part of the piezoelectric sheet 31; an annular groove is provided on the upper part of the piston rod 52, and electric sheet grooves are respectively provided on both sides of the piston rod 52. The surface of the electric sheet groove and the surface of the annular groove are respectively sprayed with an insulating coating. The piezoelectric sheet 31 is installed in the annular groove, and the positive conductive sheet 32 ​​and the negative conductive sheet 33 are respectively installed in the corresponding electric sheet grooves.

[0043] The contact ring assembly 4 cooperates with the pressure sensing structure 3 to transmit the electrical signal converted by the pressure sensing structure 3 to the controller. The contact ring assembly 4 is installed on the upper part of the cylinder 1;

[0044] The piston structure 5 is installed inside the cylinder 1. The piston structure 5 includes a piston disc 51, a piston rod 52 installed on the upper part of the piston disc 51, and a guide ring and multiple oil seals sleeved on the outside of the piston disc 51. The upper part of the piston rod 52 passes through the upper partition 8, the dust cover 2 and the contact ring assembly 4 in sequence; two one-way valves 17 are installed inside the piston disc 51.

[0045] An airflow circuit assembly 6 is used to form a gas passage outside the cylinder 1. The airflow circuit assembly 6 is installed on the outside of the cylinder 1. The connecting pipe 1 14 and the connecting pipe 2 11 are respectively connected to the airflow circuit assembly 6. The airflow circuit assembly 6 includes a housing 61 and an airflow regulating structure 62.

[0046] The controller assembly 7 is used to receive signals from the pressure sensing structure 3 and control the airflow loop assembly 6. The controller assembly 7 is installed on the outside of the cylinder 1 and is connected to the pressure sensing structure 3 and the airflow loop assembly 6.

[0047] The contact ring assembly 4 includes a pressure cover 41, a limiting groove 42, a positive conductive block 43, a negative conductive block 44 and a connecting female terminal 45. The pressure cover 41 is installed on the upper part of the cylinder 1, and the limiting groove 42 is opened in the middle of the pressure cover 41. The positive conductive block 43 and the negative conductive block 44 are respectively installed on the inner surface of the limiting groove 42. The positive conductive block 43 abuts against the positive conductive sheet 32, and the negative conductive block 44 abuts against the negative conductive sheet 33. The connecting female terminal 45 is installed on one side of the pressure cover 41, and the positive conductive block 43 and the negative conductive block 44 are respectively connected to the connecting female terminal 45.

[0048] The airflow regulating structure 62 includes a solenoid valve 1 621, a solenoid valve 2 622, an air guide pipe 1 623 and a manual regulating valve 624. The air guide pipe 1 623 is installed inside the shell 61. The two ends of the air guide pipe 1 623 are respectively connected to the solenoid valve 1 621 and the solenoid valve 2 622. The manual regulating valve 624 is connected to the air guide pipe 1 623. One end of the manual regulating valve 624 passes through the shell 61. The connecting pipe 2 11 is connected to the solenoid valve 1 621, and the connecting pipe 1 14 is connected to the solenoid valve 2 622.

[0049] The controller assembly 7 includes a controller, a battery and a connecting male terminal 74 that cooperates with the connecting female terminal 45. The controller is connected to the battery, and the connecting male terminal 74 is connected to the controller. The controller and the battery are installed inside the outer shell 61, and the connecting male terminal 74 passes through the outer shell 61. The solenoid valve 1 621 and the solenoid valve 2 622 are respectively connected to the controller.

[0050] Example 2

[0051] See also Figure 7-10 The present invention also provides a technical solution: a nitrogen spring with controllable delayed rebound, comprising: a cylinder 1, a dust cover 2, a pressure sensing structure 3, a contact ring assembly 4, a piston structure 5, an airflow circuit assembly 6, a controller assembly 7 and an upper partition 8.

[0052] The cylinder 1 has an open structure at the top, and an upper partition 8 is installed inside the cylinder 1. An air guide groove 9 is provided on the lower side of the upper partition 8, and an air guide groove 3 10 is provided on one side of the upper partition 8. The air guide groove 3 10 is connected to the air guide groove 9, and one end of the air guide groove 3 10 is connected to a connecting pipe 2 11; an air guide groove 2 12 is provided at the lower part of the cylinder 1, and an inflation valve 13 is provided at one end of the air guide groove 2 12, and a connecting pipe 14 is connected to the end of the air guide groove 2 12 away from the inflation valve 13, and an air inlet 15 is provided on the lower side of the cylinder 1, and the air inlet 15 is connected to the air guide groove 2 12; a dust cover 2 is installed on the upper inner side of the cylinder 1, and a retaining ring is provided on the outer side of the dust cover 2; an L-shaped control air groove 16 is installed on the side of the upper partition 8 away from the air guide groove 9, and one end of the L-shaped control air groove 16 passes through the cylinder 1 and a sealing column is connected to its internal thread.

[0053] The pressure sensing structure 3 is used to sense pressure and convert the pressure signal into an electrical signal. The pressure sensing structure 3 includes a piezoelectric sheet 31, a positive conductive sheet 32, a negative conductive sheet 33, and an insulating spacer 34. The positive conductive sheet 32 ​​and the negative conductive sheet 33 are respectively connected to the upper and lower surfaces of the piezoelectric sheet 31. The insulating spacer 34 is installed on the upper part of the piezoelectric sheet 31.

[0054] The contact ring assembly 4 cooperates with the pressure sensing structure 3 to transmit the electrical signal converted by the pressure sensing structure 3 to the controller. The contact ring assembly 4 is installed on the upper part of the cylinder 1;

[0055] The piston structure 5 is installed inside the cylinder 1. The piston structure 5 includes a piston disc 51, a piston rod 52 installed on the upper part of the piston disc 51, and a guide ring and multiple oil seals sleeved on the outside of the piston disc 51. The upper part of the piston rod 52 passes through the upper partition 8, the dust cover 2 and the contact ring assembly 4 in sequence; an annular groove is provided on the upper part of the piston rod 52, and electric plate grooves are provided on both sides of the piston rod 52. The surface of the electric plate groove and the surface of the annular groove are respectively sprayed with insulating coatings. The piezoelectric plate 31 is installed in the annular groove, and the positive conductive plate 32 and the negative conductive plate 33 are respectively installed in the corresponding electric plate grooves.

[0056] The airflow circuit assembly 6 is used to form a gas passage outside the cylinder 1. The airflow circuit assembly 6 is installed on the outside of the cylinder 1. The connecting pipe 1 14 and the connecting pipe 2 11 are respectively connected to the airflow circuit assembly 6. The airflow circuit assembly 6 includes a housing 61 and an airflow regulating structure 62.

[0057] The controller assembly 7 is used to receive signals from the pressure sensing structure 3 and control the airflow loop assembly 6. The controller assembly 7 is installed on the outside of the cylinder 1 and is connected to the pressure sensing structure 3 and the airflow loop assembly 6.

[0058] The contact ring assembly 4 includes a pressure cover 41, a limiting groove 42, a positive conductive block 43, a negative conductive block 44 and a connecting female terminal 45. The pressure cover 41 is installed on the upper part of the cylinder 1, and the limiting groove 42 is opened in the middle of the pressure cover 41. The positive conductive block 43 and the negative conductive block 44 are respectively installed on the inner surface of the limiting groove 42. The positive conductive block 43 abuts against the positive conductive sheet 32, and the negative conductive block 44 abuts against the negative conductive sheet 33. The connecting female terminal 45 is installed on one side of the pressure cover 41, and the positive conductive block 43 and the negative conductive block 44 are respectively connected to the connecting female terminal 45.

[0059] The controller assembly 7 includes a controller, a battery and a connecting male terminal 74 that cooperates with the connecting female terminal 45. The controller is connected to the battery, and the connecting male terminal 74 is connected to the controller. The controller and the battery are installed inside the outer shell 61, and the connecting male terminal 74 passes through the outer shell 61. The solenoid valve 1 621 and the solenoid valve 2 622 are respectively connected to the controller.

[0060] The airflow regulating structure 62 includes a solenoid valve three 6210, an air duct two 6220 and an air pressure sensor 6230. One end of the air duct two 6220 is connected to the solenoid valve three 6210. The air pressure sensor 6230 is installed in the air duct two 6220. The connecting tube two 11 is connected to the solenoid valve three 6210. The connecting tube one 14 passes through the outer shell 61 and is connected to the air duct two 6220. The solenoid valve three 6210 and the air pressure sensor 6230 are respectively connected to the controller.

[0061] Working principle: When pressure acts on the upper part of the piston rod 52, the piezoelectric sheet 31 senses the pressure and converts the pressure signal into an electrical signal. The electrical signal is transmitted to the connecting female terminal 45 through the positive conductive sheet 32 ​​and the negative conductive sheet 33 and the positive conductive block 43 and the negative conductive block 44 in contact with the two, and is transmitted to the controller through the connecting male terminal 74 connected to the connecting female terminal 45. During the downward movement of the piston disc 51, the controller keeps the solenoid valve 1 621 and the solenoid valve 2 622 closed. At this time, the gas in the space below the piston plate in the cylinder 1, hereinafter referred to as the rodless part, flows to the space above the piston plate, hereinafter referred to as the rod part, through the one-way valve 17, so that the air pressure of the rodless part and the rod part is balanced. ; When the pressure on the upper part of the piston rod 52 is removed, due to the different force areas of the rodless part and the rod part, the piston rod 52 moves upward and rebounds, the space of the rod part is squeezed, the air pressure increases, the force on the upper and lower surfaces of the piston plate is balanced, and the piston rod 52 stops moving; since the pressure on the piezoelectric piece 31 disappears, no electrical signal is transmitted to the controller, and the solenoid valve 1 621 and the solenoid valve 2 622 are controlled to open at this time, and the air flow of the rod part passes through the air guide groove 1 9, the air guide groove 3 10, the connecting pipe 2 11, the air guide pipe 1 623, the connecting pipe 1 14, the air guide groove 2 12 and the air inlet 15 into the rodless part, so that the air pressure of the rod part and the rodless part is restored to balance, and the piston rod 52 moves upward.

[0062] In some usage scenarios, the rebound of the nitrogen spring is strictly restricted or even prohibited. In this case, the sealing column can be removed and an external air control device can be connected through one end of the L-shaped control air groove. Since the L-shaped control air groove 16 is installed, the lower part of the L-shaped control air groove 16 is connected to the rod part. The rod part is inflated by the external air control device to regulate the air pressure of the rod part. The delayed opening of the solenoid valve 1 621 and the solenoid valve 2 622 is coordinated to achieve the effect of keeping the piston disc 51 stationary and preventing rebound.

[0063] The gas flow rate in the air guide tube 1 623 is adjusted by the manual regulating valve 624, thereby adjusting the moving speed of the piston rod.

[0064] In some embodiments, the installation of a one-way valve is eliminated, reducing the difficulty of processing the piston disc 51. The gas flow between the rod portion and the rodless portion is achieved through the airflow adjustment structure 62. When the piston rod 52 is forced to move downward, the controller senses an electrical signal. At the same time, the air pressure sensor 6230 detects the air pressure signal and transmits it to the controller. The controller controls the solenoid valve three 6210 to open, and the nitrogen from the rodless portion enters the rod portion through the bottom air guide groove two 12, the air guide pipe two 6220, the air guide groove three 10 and the air guide groove one 9. When the pressure value reaches the set value, the solenoid valve is closed. When the external pressure is removed, the piston rod 52 will rebound slightly and then remain stationary. Similarly, if rebound is not required, the above connection method can be used to control the rebound, which will not be repeated here.

[0065] The controller controls the electromagnetic valve 3 6210 to open, restoring the air flow path. Due to the different forces on the upper and lower parts of the piston plate, the piston rod 52 moves upward and returns to its original position.

[0066] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0067] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Nitrogen spring with controllable delayed rebound, characterized by: include A cylinder (1), wherein the cylinder (1) is an upper open structure, an upper partition (8) is provided inside the cylinder (1), an air guide groove (9) is provided on the lower side of the upper partition (8), an air guide groove (10) is provided on one side of the upper partition (8), the air guide groove (10) is communicated with the air guide groove (9), and one end of the air guide groove (10) is connected to a connecting pipe (11); The lower part of the cylinder (1) is provided with a second air guide groove (12), one end of the second air guide groove (12) is provided with an air charging valve (13), and the end of the second air guide groove (12) away from the air charging valve (13) is connected to a first connecting pipe (14), and the lower side of the cylinder (1) is provided with an air inlet (15), and the air inlet (15) is communicated with the second air guide groove (12); A dust cover (2) is provided on the inner upper portion of the cylinder (1), and a snap ring is sleeved on the outer side of the dust cover (2); A pressure sensing structure (3) is used to sense pressure and convert the pressure signal into an electrical signal, the pressure sensing structure (3) comprising a piezoelectric sheet (31), a positive conductive sheet (32), a negative conductive sheet (33) and an insulating gasket (34), the positive conductive sheet (32) and the negative conductive sheet (33) being connected to the upper and lower surfaces of the piezoelectric sheet (31) respectively, and the insulating gasket (34) being arranged on the upper part of the piezoelectric sheet (31); A contact ring assembly (4) cooperates with the pressure sensing structure (3) and is used to transmit the electrical signal converted by the pressure sensing structure (3) to the controller, wherein the contact ring assembly (4) is arranged on the upper part of the cylinder (1); A piston structure (5) is arranged inside the cylinder (1), and the piston structure (5) includes a piston disc (51), a piston rod (52) arranged on the upper part of the piston disc (51), and a guide ring and a plurality of oil seals sleeved on the outer side of the piston disc (51). The upper part of the piston rod (52) passes through the upper partition (8), the dust cover (2) and the contact ring assembly (4) in sequence. An airflow circuit assembly (6) is used to form a gas passage outside the cylinder (1). The airflow circuit assembly (6) is arranged outside the cylinder (1). The connecting pipe 1 (14) and the connecting pipe 2 (11) are respectively connected to the airflow circuit assembly (6). The airflow circuit assembly (6) includes a housing (61) and an airflow regulating structure (62). a controller assembly (7) for receiving signals from the pressure sensing structure (3) and controlling the airflow loop assembly (6); the controller assembly (7) is arranged outside the cylinder (1) and is connected to the pressure sensing structure (3) and the airflow loop assembly (6); An L-shaped air control groove (16) is provided on one side of the upper partition (8) away from the air guide groove (9). One end of the L-shaped air control groove (16) passes through the cylinder (1) and is internally threadedly connected to a sealing column.

2. The nitrogen gas spring with controllable delayed rebound according to claim 1, characterized in that: An annular groove is provided on the upper portion of the piston rod (52), and electric sheet grooves are respectively provided on both sides of the piston rod (52). The surfaces of the electric sheet groove and the annular groove are respectively sprayed with insulating coatings. The piezoelectric sheet (31) is arranged in the annular groove, and the positive electrode conductive sheet (32) and the negative electrode conductive sheet (33) are respectively arranged in the corresponding electric sheet grooves.

3. The nitrogen gas spring with controllable delayed rebound according to claim 1, characterized in that: The contact ring assembly (4) comprises a pressure cover (41), a limiting groove (42), a positive conductive block (43), a negative conductive block (44) and a plurality of connecting female terminals (45). The pressure cover (41) is arranged on the upper part of the cylinder (1), the limiting groove (42) is opened in the middle part of the pressure cover (41), the positive conductive block (43) and the negative conductive block (44) are respectively arranged on the inner surface of the limiting groove (42), the positive conductive block (43) abuts against the positive conductive sheet (32), and the negative conductive block (44) abuts against the negative conductive sheet (33), and the connecting female terminal (45) is arranged on one side of the pressure cover (41), and the positive conductive block (43) and the negative conductive block (44) are respectively connected to the connecting female terminal (45).

4. The nitrogen gas spring with controllable delayed rebound according to claim 1, characterized in that: Two one-way valves (17) are provided inside the piston disc (51).

5. The nitrogen gas spring with controllable delayed rebound according to claim 1, characterized in that: The airflow regulating structure (62) comprises a solenoid valve 1 (621), a solenoid valve 2 (622), an air guide pipe 1 (623) and a manual regulating valve (624). The air guide pipe 1 (623) is arranged inside the housing (61). The two ends of the air guide pipe 1 (623) are respectively connected to the solenoid valve 1 (621) and the solenoid valve 2 (622). The manual regulating valve (624) is connected to the air guide pipe 1 (623). One end of the manual regulating valve (624) passes through the housing (61). The connecting pipe 2 (11) is connected to the solenoid valve 1 (621), and the connecting pipe 1 (14) is connected to the solenoid valve 2 (622).

6. The nitrogen gas spring with controllable delayed rebound according to claim 5, characterized in that: The controller assembly (7) includes a controller, a battery, and a plurality of connecting male terminals (74) that cooperate with the connecting female terminals (45). The controller is connected to the battery, and the connecting male terminals (74) are connected to the controller. The controller and the battery are arranged inside the housing (61), and the connecting male terminals (74) pass through the housing (61). The solenoid valve 1 (621) and the solenoid valve 2 (622) are respectively connected to the controller.

7. The nitrogen gas spring with controllable delayed rebound according to claim 1, characterized in that: The airflow regulating structure (62) includes a solenoid valve three (6210), an air guide tube two (6220) and an air pressure sensor (6230). One end of the air guide tube two (6220) is connected to the solenoid valve three (6210). The air pressure sensor (6230) is arranged in the air guide tube two (6220). The connecting tube two (11) is connected to the solenoid valve three (6210). The connecting tube one (14) penetrates into the housing (61) and is connected to the air guide tube two (6220). The solenoid valve three (6210) and the air pressure sensor (6230) are respectively connected to the controller.

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