Patent No.:CN205978236U Date:2016-08-11

Google Patent: https://patents.google.com/patent/CN205978236U/en?oq=CN205978236U

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

Abstract

This utility model relates to equipment for automated assembly, inflation, simultaneous closing, and double-sealed structure of gas springs. It includes a base, a clamping equipment set in the middle of the base, and an inflation closing equipment set on the left side of the base. The clamping equipment includes a vertically mounted lower pressure cylinder or hydraulic cylinder on the middle of the base, a lower connecting seat mounted on the lower pressure cylinder or hydraulic cylinder piston rod, an upper half-round replaceable frame set on the lower connecting seat, and a lower half-round replaceable frame installed on the base. This utility model has advanced structure, high automation degree, high work efficiency, sturdy and durable structure, convenient use, good quality of assembled products, low cost, and reasonable process.

Description

Automated Assembly and Inflation equipment for Simultaneous Closing and Double-Sealed Gas Springs

Technical Field

This utility model relates to equipment for automated assembly, inflation, simultaneous closing, and double-sealed structure of gas springs.

Background Technology

Currently, the “CN201120169308.0-Repairable Gas Spring” cannot achieve direct inflation of the cylinder, leading to inaccurate inflation volumes; subsequent gas or oil leakage phenomena in products; the existing gas springs generally adopt pre-inflation and post-welded plug seals for the sealing guide parts, resulting in a short lifespan of the seals.

Utility Model Content

The technical problem to be solved by this utility model is to provide an automated assembly, inflation, simultaneous closing, and double-sealed structure gas spring equipment with a reasonable design, compact structure, and convenient use.

To solve the above problems, the technical scheme adopted by this utility model is: An automated assembly, inflation, simultaneous closing, and double-sealed structure gas spring equipment includes a base, a clamping equipment set in the middle of the base, and an inflation closing equipment set on the left side of the base. The clamping equipment includes a vertically mounted lower pressure cylinder or hydraulic cylinder on the middle of the base, a lower connecting seat mounted on the lower pressure cylinder or hydraulic cylinder piston rod, and an upper half-round replaceable frame set on the lower connecting seat and a lower half-round replaceable frame installed on the base. The inflation closing equipment includes a left push-in port hydraulic cylinder installed at the left end of the base, a replaceable left push-in port inflation seat mounted on the piston rod of the left push-in port hydraulic cylinder, an inflation pipeline interface set at the replaceable left push-in port inflation seat’s outlet, an inflation sealing shoulder set at the right end of the replaceable left push-in port inflation seat, a left closing mold installed in the inflation sealing shoulder, and an inflation through hole set in the replaceable left push-in port inflation seat.

The replaceable left push-in port inflation seat has a positioning shoulder for placing the rear plug, which is connected to the central hole of the inflation sealing shoulder and the cylinder rodless cavity’s left end during inflation. The rear plug of the assembled gas spring is set in the inflation through hole, and its assembly stroke is less than the distance between the stepped hole’s inner side surface and the mold seal ring. It also includes a control system. The control system includes clamping oil or air circuits, left push-in closing oil circuits, and inflation air circuits.

The clamping oil or air circuits include a clamping pump connected to an oil tank or atmosphere at the inlet, a lower pressure cylinder or hydraulic cylinder, and a clamping three-position four-way solenoid valve. The clamping pump’s outlet is connected to one inlet of the clamping three-position four-way solenoid valve, while the other inlet is connected to the oil tank. One outlet of the clamping three-position four-way solenoid valve is connected to the rodless cavity of the lower pressure cylinder or hydraulic cylinder, and the other outlet is connected to the rod cavity of the lower pressure cylinder or hydraulic cylinder.

The left push-in closing oil circuits include a left push-in port hydraulic cylinder, a closing oil pump connected to the oil tank at the inlet, and a closing push two-position four-way solenoid valve. The closing oil pump is connected to one inlet of the closing push two-position four-way solenoid valve, while the other inlet is connected to the oil tank. One outlet of the closing push two-position four-way solenoid valve is connected to the rodless cavity of the left push-in port hydraulic cylinder, and the other outlet is connected to the rod cavity of the left push-in port hydraulic cylinder.

The inflation air circuits include a high-pressure inflation air pump, two-position three-way solenoid valve, inflation through hole, rodless cavity of the assembled gas spring, and an electronic pressure gauge. The high-pressure inflation air pump, two-position three-way solenoid valve, inflation through hole, and rodless cavity of the assembled gas spring are sequentially connected, and the electronic pressure gauge is set on the inflation through hole.

Further Improvements on the Technical Scheme

Additionally, it includes a right pushing and closing equipment set on the right side of the base. The right pushing and closing equipment includes a right pushing and closing hydraulic cylinder and a guide seat set at the left end of the piston rod of the right pushing and closing hydraulic cylinder. A right closing mold is set in the stopping mouth at the left end of the guide seat, corresponding to the right end closing of the cylinder.

The control system also includes a right pushing and closing oil circuit, which has the same structure as the left pushing and closing oil circuit. Additionally, the control system includes time relays or logic controllers to control the on and off sequence and timing of the clamping three-position four-way solenoid valve, closing push two-position four-way solenoid valve, and two-position three-way solenoid valve’s corresponding coils.

A balance circuit or a bidirectional hydraulic lock is set between the clamping three-position four-way solenoid valve and the rod chamber of the lower pressure cylinder or hydraulic cylinder; a replenishment oil circuit is set between the oil tank and the rodless chamber of the lower pressure cylinder or hydraulic cylinder, including a compensation check valve set between the oil tank or atmosphere and the rodless chamber of the lower pressure cylinder or hydraulic cylinder.

The intermediate function of the clamping three-position four-way solenoid valve is M-type.

Benefits of the Technical Scheme

The beneficial effects produced by adopting the above technical scheme include:

• The clamping mechine can use either a three-jaw chuck or a four-jaw chuck, which can be manually, mechanically, or pneumatically driven. The preferred structure is shown in the diagram.
• The clamping structure with the replaceable lower and upper half-round frames is reasonable, sturdy, durable, accurately positioned, highly efficient, firmly clamped, and highly extendable.
• The inflation closing mechine can adopt hot riveting or cold riveting, with press riveting being preferred.
• According to different customer requirements for the closing size and shape, the connection root is set with an internal chamfer or internal rounded corners.
• The assembly stroke of the rear plug is less than the distance between the inner side of the stepped hole and the mold seal ring, ensuring the continuity and rationality of the assembly work.
• The coaxial setting improves assembly precision.
• To improve equipment assembly efficiency and optimize processes, a right pushing and closing mechine was added.
• The through-hole can extend the versatility and extendability of the equipment.
• To improve automation, electric, hydraulic, or pneumatic controls can also be adopted.
• The electronic pressure gauge achieves pressure monitoring, ensuring the stability of equipment pressure.
• The balance circuit or bidirectional hydraulic lock ensures the stability of the lower pressure cylinder or hydraulic cylinder. The replenishment oil circuit ensures rapid oil replenishment during quick descent.
• The intermediate function is M-type, facilitating unloading work and improving pressure retention effects.
• The replaceable lower and upper half-round frames are set in two groups, with the left and right ends of the lower connecting seat respectively, improving coaxiality and workmanship.

This utility model has an advanced structure, high automation degree, high work efficiency, sturdy and durable structure, convenient use, good quality of assembled products, low cost, and reasonable process.

Illustration Description

Figure 1: Schematic diagram of the gas spring structure with the rear plug to be assembled. Figure 2: Schematic diagram of the local structure on the left side of the gas spring after assembling the rear plug. Figure 3: Schematic diagram of the piston plate structure. Figure 4: Right side view of the piston plate structure. Figure 5: Schematic diagram of the gas spring assembly equipment. Figure 6: Schematic diagram of the inflation air circuit. Figure 7: Schematic diagram of the closing air circuit. Figure 8: Schematic diagram of oil circuit in clamping scheme 1. Figure 9: Schematic diagram of air circuit in clamping scheme 2.

Description of Components

1. Cylinder
2. Piston rod
3. Right connector
4. Left connector
5. Rear plug
6. Seal ring
7. Piston
8. Damping hole
9. Sealing groove
10. Piston plate
11. First lip seal
12. Fit clearance
13. Ventilation groove
14. Intermediate seal spacer
15. Second lip seal guide sleeve
16. Left closing end
17. Closing groove
18. Gas spring to be assembled
19. Base
20. Lower pressure cylinder or hydraulic cylinder
21. Movable lower pressure seat
22. Upper semi-circular replaceable frame
23. Lower semi-circular replaceable frame
24. Left push-in hydraulic cylinder
25. Replaceable left push-in inflation seat
26. Inflation through hole
27. Left closing mold
28. Inflation sealing shoulder
29. Right pushing hydraulic cylinder
30. Right closing mold
31. High-pressure inflation air pump
32. Two-position three-way solenoid valve
33. Electronic pressure gauge
34. Closing oil pump
35. Two-position four-way solenoid valve for closing push
36. Clamping pump
37. Three-position four-way solenoid valve for clamping
38. Balance circuit
39. Compensation check valve

Specific Implementation Mode

As shown in Figures 1-4, Figure 1 shows the gas spring with simultaneous closing and double-sealed structure of this embodiment, including cylinder 1, rear plug 5 installed in the inner hole at the left end of cylinder 1, and at least one set of seal rings 6 installed between the outer wall of rear plug 5 and the inner wall of cylinder 1.

At least one annular groove for placing seal rings 6 is set on the outer wall of rear plug 5. Closing groove 17 is set on rear plug 5, while left closing end 16 is set at the left end of cylinder 1, hooking into closing groove 17.

Piston rod 2 is installed inside cylinder 1. A guiding and sealing assembly is set on piston rod 2 at the right end of cylinder 1, including a first lip seal 11, an intermediate seal spacer 14, and a second lip seal guide sleeve 15. A buffer pressure-free sealing area is formed between the first lip seal 11 and the intermediate seal spacer 14, as well as between the intermediate seal spacer 14 and the second lip seal guide sleeve 15.

Right closing is set at the right end of cylinder 1. Right closing annular groove is set on the second lip seal guide sleeve 15, hooking into the right closing annular groove. Intermediate seal spacer 14 is firmly riveted between the outer wall of intermediate seal spacer 14 and the inner wall of cylinder 1.

Piston rod 2 is installed inside cylinder 1, with piston 7 and piston plate 10 set on piston rod 2. Piston 7 divides the inner cavity of cylinder 1 into a rod cavity and a rodless cavity, with the rod cavity on the right side of the rodless cavity. Piston 7 and piston plate 10 are tightly riveted on piston rod 2. A fit clearance 12 is set between the inner wall of cylinder 1 and the outer wall of piston 7. A sealing groove 9 is set between the right side of piston 7 and the left side of piston plate 10. Damping hole 8 and O-ring seal are set on piston 7, with ventilation groove 13 set on piston plate 10.

Ventilation groove 13 is set in a radial groove shape, dividing piston plate 10 into three or more odd or even blade structures. Ventilation groove 13 is set in a radial arc or curved long groove.

Left connector 4 is installed at the left end of rear plug 5, while right connector 3 is installed at the right end of piston rod 2.

The annular groove for placing seal rings 6 preferably includes two grooves, with one seal ring 6 installed in each groove. The structure is reasonable and provides a good sealing effect. The right closing hooks into the right closing annular groove. The closing groove 17 hooks with the left closing end 16, facilitating assembly without welding deformation, providing high precision, reasonable structure, and long service life.

The guiding and sealing assembly includes the first sealing cover 11, intermediate sealing cover 14, and second sealing cover 15 set sequentially from left to right inside cylinder 1. The structure is reasonable and provides a long service life. Intermediate sealing cover 14 is firmly fixed by riveting between the outer wall of intermediate sealing cover 14 and the inner wall of cylinder 1.

Detailed Implementation Mode

The piston structure of this utility model is reasonable and operates stably. The central hole (13) divides the piston plate (10) into spiral blade structures, improving its rigidity and ensuring smoother ventilation.

This utility model adopts post-inflation closing and pressing riveting. The rear plug (5) is enhanced with two O-rings. When the rear plug (5) and the cylinder (1) are separated, high-pressure sealing inflation is performed on the empty cylinder (1) cavity, ensuring consistent inflation volume and meeting the precise force requirements of the gas spring. At the moment of inflation completion, the closing molds of the high-pressure inflation equipment, namely the left closing mold (112) and the right closing mold (115), push the rear plug (5) into the cylinder (1) while closing, ensuring the precision consistency of the gas spring’s inflation force value, improving the sealing performance and service life of the guiding sealing assembly.

The piston plate (10) is a new type of five-point daisy piston plate. The five points of the daisy piston improve the concentricity of the piston rod (2), guiding sealing assembly, cylinder (1), piston body (7), and piston plate (10), making the gas spring run more stably. The guiding sealing assembly adopts secondary pressureless sealing, which means there is no initial air pressure between the two sealing components. The first sealing component blocks air pressure, while the second sealing component, due to the absence of pressure, exerts negligible friction on the piston rod. As the gas spring extends and retracts, a reasonable accumulation of oil on the piston rod surface gradually applies pressure to the second sealing component’s lip, thereby improving the sealing performance and service life of the guiding sealing assembly.

This utility model can be widely applied to any category of gas springs.

Figures 5-9: Explanation

The equipment for the assembly, inflation, simultaneous closing, and double-sealed gas spring structure includes a base (102), a clamping equipment set in the middle of the base (102), and an inflation closing equipment set on the left side of the base (102). The clamping equipment includes a vertically mounted lower pressure cylinder or hydraulic cylinder (103), a movable lower pressure seat (104) installed at the lower end of the piston rod of the lower pressure cylinder or hydraulic cylinder (103), an upper half-round replaceable frame (105) set at the lower end of the movable lower pressure seat (104), and a lower half-round replaceable frame (106) installed on the base (102). The lower half-round replaceable frame (106) and the upper half-round replaceable frame (105) clamp the horizontally set gas spring (101) to be assembled.

The inflation closing equipment includes a left push-in hydraulic cylinder (107) installed at the left end of the base (102), a replaceable left push-in inflation seat (108) installed on the piston rod of the left push-in hydraulic cylinder (107), an inflation pipeline interface set on the replaceable left push-in inflation seat (108), an inflation sealing shoulder (113) set at the right end of the replaceable left push-in inflation seat (108), a left closing mold (112) installed in the inflation sealing shoulder (113), and an inflation through hole (110) set in the replaceable left push-in inflation seat (108). The inflation through hole (110) is located at the left end of the left closing mold (112), and the left closing mold (112) has a central hole. The left closing mold (112) has a stepped hole with a connection root for closing the left end of the cylinder (1) to be assembled.

The replaceable left push-in inflation seat (108) has a positioning shoulder for placing the rear plug (5). During inflation, the inflation pipeline interface, inflation through hole (110), central hole of the left closing mold (112), and the rodless cavity at the left end of the cylinder (1) are connected for inflation. The rear plug (5) of the gas spring (101) to be assembled is set in the inflation through hole (110). The assembly stroke of the rear plug (5) is less than the distance between the inner side surface of the stepped hole and the mold seal ring. The rear plug (5), cylinder (1), left closing mold (112), lower half-round replaceable frame (106), and upper half-round replaceable frame (105) are coaxially set.

Additionally, the equipment includes a right pushing and closing equipment set on the right side of the base (102). The right pushing and closing equipment includes a right pushing and closing hydraulic cylinder (114) and a guide seat set at the left end of the piston rod of the right pushing and closing hydraulic cylinder (114). A right closing mold (115) is set in the stopping mouth at the left end of the guide seat, corresponding to the right end closing of the cylinder (1). The right pushing and closing hydraulic cylinder (114) and piston rod have through holes for the piston rod (2) of the gas spring (101) to pass through. The right closing mold (115) has a through hole for the piston rod (2) to pass through, and a stepped hole at its left side, with a connection root for closing the right end of the cylinder (1). The connection root is set with internal chamfer or internal rounded corners. The right closing mold (115), rear plug (5), cylinder (1), left closing mold (112), lower half-round replaceable frame (106), and upper half-round replaceable frame (105) are coaxially set. The upper half-round replaceable frame (105) is set in two groups on the left and right ends of the movable lower pressure seat (104). The lower half-round replaceable frame (106) is set in two groups, identical in structure to the upper half-round replaceable frame (105), and correspondingly set.

Control System

The control system includes clamping oil or air circuits, right pushing and closing oil circuit, left pushing and closing oil circuit, and inflation air circuit. The clamping oil or air circuit includes a clamping pump (121) connected to the oil tank or atmosphere at the inlet, a lower pressure cylinder or hydraulic cylinder (103), and a three-position four-way solenoid valve (122) for clamping. The outlet of the clamping pump (121) is connected to one inlet of the three-position four-way solenoid valve (122), while the other inlet is connected to the oil tank or atmosphere. One outlet of the three-position four-way solenoid valve (122) is connected to the rodless cavity of the lower pressure cylinder or hydraulic cylinder (103), and the other outlet is connected to the rod cavity of the lower pressure cylinder or hydraulic cylinder (103).

The left pushing and closing oil circuit includes a left push-in hydraulic cylinder (107), a closing oil pump (119) connected to the oil tank at the inlet, and a two-position four-way solenoid valve (120) for closing push. The closing oil pump (119) is connected to one inlet of the two-position four-way solenoid valve (120), while the other inlet is connected to the oil tank. One outlet of the two-position four-way solenoid valve (120) is connected to the rod cavity of the left push-in hydraulic cylinder (107). The right pushing and closing oil circuit is identical in structure to the left pushing and closing oil circuit.

The inflation air circuit includes a high-pressure inflation air pump (116), two-position three-way solenoid valve (117), inflation through hole (110), rodless cavity of the gas spring (101) to be assembled, and an electronic pressure gauge (118). The high-pressure inflation air pump (116), two-position three-way solenoid valve (117), inflation through hole (110), and rodless cavity of the gas spring (101) to be assembled are sequentially connected. The electronic pressure gauge (118) is set on the inflation through hole (110).

The control system also includes time relays or logic controllers to control the on/off timing and sequence of the coils of the three-position four-way solenoid valve (122) for clamping, the two-position four-way solenoid valve (120) for closing push, and the two-position three-way solenoid valve (117). A balance circuit (123) or bidirectional hydraulic lock is set between the three-position four-way solenoid valve (122) for clamping and the rod cavity of the lower pressure cylinder or hydraulic cylinder (103). A replenishment oil circuit is set between the oil tank and the rodless cavity of the lower pressure cylinder or hydraulic cylinder (103), including a compensation check valve (124) set between the oil tank and the rodless cavity of the lower pressure cylinder or hydraulic cylinder (103).

The intermediate function of the three-position four-way solenoid valve (122) for clamping is M-type. The upper half-round replaceable frame (105) is set in two groups on the left and right ends of the movable lower pressure seat (104), and the lower half-round replaceable frame (106) is set in two groups, identical in structure to the upper half-round replaceable frame (105), and correspondingly set.

The clamping equipment can adopt three-jaw chuck or four-jaw chuck clamping, which can be manually, mechanically, or pneumatically driven. The preferred structure is shown in Figure 5. The clamping structure with the lower half-round replaceable frame (106) and the upper half-round replaceable frame (105) is reasonable, sturdy, durable, accurately positioned, highly efficient, firmly clamped, and highly extendable.

Specific Implementation Method

The inflation closing equipment can adopt hot riveting or cold riveting, with press riveting being preferred. According to different customer requirements for the closing size and shape, the connection root can be set with an internal chamfer or internal rounded corners. The assembly stroke of the rear plug (5) is less than the distance between the inner side surface of the stepped hole and the mold seal ring, ensuring the continuity and rationality of the assembly work. Coaxial setting improves assembly precision.

To improve assembly efficiency and optimize processes, a right pushing and closing equipment has been added. The through-hole can extend the versatility and expandability of the equipment. To enhance the degree of automation, electric, hydraulic, or pneumatic controls can also be adopted. The electronic pressure gauge (118) realizes pressure monitoring, ensuring the stability and monitoring capability of the equipment pressure.

Common balance circuits (123) or bidirectional hydraulic locks ensure the stability of the lower pressure cylinder or hydraulic cylinder (103). The replenishment oil circuit ensures rapid oil replenishment during quick descent. The intermediate function is M-type, facilitating unloading work and improving pressure retention effects. The lower half-round replaceable frame (106) and the upper half-round replaceable frame (105) are set in two groups on the left and right ends of the movable lower pressure seat (104), improving their coaxiality and workmanship.

When assembling the above products using this equipment, the rear plug (5) is pre-placed in the inflation through hole (110). The left closing mold (112) and right closing mold (115) are respectively placed in the inflation sealing shoulder (113) and the guide seat. This utility model can achieve interchangeable connections through various means, such as threaded connections, socket pin assembly, tapered fit, or slot ring assembly.

The intermediate relay, time controller, or PCL logic controller sets the on/off timing and sequence of each valve group. The gas spring (101) to be assembled is placed on the lower half-round replaceable frame (106). The clamping pump (121) is activated, and the three-position four-way solenoid valve (122) for clamping is powered on. The lower pressure cylinder or hydraulic cylinder (103) drives the upper half-round replaceable frame (105) downward through the movable lower pressure seat (104) to clamp the gas spring (101) to be assembled. Once clamped, at the specified time A, the three-position four-way solenoid valve (122) for clamping is powered off to retain pressure, and the compensation check valve (124) quickly replenishes oil.

The two-position four-way solenoid valve (120) for closing push is powered on for the first time, starting the left push-in hydraulic cylinder (107) with the closing oil pump (119). The left push-in hydraulic cylinder (107) drives the replaceable left push-in inflation seat (108) to move rightward. The cylinder (1) enters the stepped hole of the left closing mold (112) and achieves axial sealing through the seal ring. At the specified time B, the two-position four-way solenoid valve (120) for closing push is powered off, stopping the movement. The two-position three-way solenoid valve (117) and high-pressure inflation air pump (116) are activated. The high-pressure inflation air pump (116) inflates the rodless cavity of the cylinder (1) through the two-position three-way solenoid valve (117) and the inflation through hole (110), achieving precise inflation.

At the specified time C, the two-position three-way solenoid valve (117) and high-pressure inflation air pump (116) are powered off. The two-position four-way solenoid valve (120) for closing push of the left push-in hydraulic cylinder (107) is powered on for the second time, starting the closing oil pump (119) of the left push-in hydraulic cylinder (107). The left push-in hydraulic cylinder (107) continues to drive the rear plug (5) rightward and pushes it to the left end of the cylinder (1). Then, the replaceable left push-in inflation seat (108) continues to move rightward while the right pushing and closing hydraulic cylinder (114) moves leftward. Under the action of the left push-in hydraulic cylinder (107) and the right pushing and closing hydraulic cylinder (114), the left closing mold (112) and the right closing mold (115) close the cylinder (1).

At the specified time D, the two-position three-way solenoid valve (117) is powered on and changes direction, releasing air from the inflation through hole (110). The two-position four-way solenoid valve (120) for closing push is powered on and changes direction, releasing the cylinder (1). The three-position four-way solenoid valve (122) for clamping is powered on and changes direction, allowing the cylinder (1) to be removed. The left closing mold (112) and right closing mold (115) are sleeved on the closed end of the cylinder (1), achieving simultaneous removal. As a structural variation, one oil pump can be used to simultaneously control the linkage of the valve groups through combination. Compared to this integrated linkage control scheme, the control system of this embodiment, where each oil pump controls its valve group, avoids mutual interference, facilitates maintenance and troubleshooting, and reduces pump oil load.

This utility model has an advanced structure, high automation degree, high work efficiency, sturdy and durable structure, convenient use, good quality of assembled products, low cost, and reasonable process.

Lastly, it should be noted that the above embodiments are only for illustrating the technical scheme of this utility model, not for limiting it. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical scheme described in the above embodiments, or replace some of the technical features equivalently. It is obvious for those skilled in the art to combine multiple technical schemes of this utility model. Such modifications or replacements do not depart from the spirit and scope of the technical scheme of this utility model.

Claims

Automated Assembly and Inflation equipment for Simultaneous Closing and Double-Sealed Gas Springs, invented by LeiYan Gas Spring, a pioneer Chinese Gas Spring Manufacture

1. Automated Assembly and Inflation equipment for Simultaneous Closing and Double-Sealed Gas Springs:
   • Components: Includes a base (102), a clamping equipment set in the middle of the base (102), and an inflation closing equipment set on the left side of the base (102).
   • Clamping equipment : Vertically mounted lower pressure cylinder or hydraulic cylinder (103) on the middle of the base (102), upper half-round replaceable frame (105) on the piston rod of the lower pressure cylinder or hydraulic cylinder (103), and lower half-round replaceable frame (106) on the base (102).
   • Inflation Closing equipment : Left push-in hydraulic cylinder (107) on the left end of the base (102), replaceable left push-in inflation seat (108) on the piston rod of the left push-in hydraulic cylinder (107), inflation pipeline interface on the replaceable left push-in inflation seat (108), inflation sealing shoulder (113) on the right end of the replaceable left push-in inflation seat (108), left closing mold (112) in the inflation sealing shoulder (113), and inflation through hole (110) in the replaceable left push-in inflation seat (108).
   • Positioning Stop Mouth: In the replaceable left push-in inflation seat (108) for placing the rear plug (5). During inflation, the inflation pipeline interface, inflation through hole (110), central hole of the left closing mold (112), and the rodless cavity at the left end of the cylinder (1) are connected for inflation. The rear plug (5) is set in the inflation through hole (110), with the assembly stroke of the rear plug (5) being less than the distance between the inner side surface of the stepped hole and the mold seal ring.
   • Control System: Includes clamping oil or air circuits, left pushing and closing oil circuit, and inflation air circuit. The clamping oil or air circuit includes a clamping pump (121) connected to the oil tank or atmosphere at the inlet, a lower pressure cylinder or hydraulic cylinder (103), and a three-position four-way solenoid valve (122) for clamping. The clamping pump (121) is connected to one inlet of the three-position four-way solenoid valve (122), with the other inlet connected to the oil tank. The clamping pump’s outlet is connected to the rodless cavity of the lower pressure cylinder or hydraulic cylinder (103), and the other outlet is connected to the rod cavity of the lower pressure cylinder or hydraulic cylinder (103). The left pushing and closing oil circuit includes a left push-in hydraulic cylinder (107), a closing oil pump (119) connected to the oil tank at the inlet, and a two-position four-way solenoid valve (120) for closing push. The closing oil pump (119) is connected to one inlet of the two-position four-way solenoid valve (120), with the other inlet connected to the oil tank. The closing push solenoid valve (120) is connected to the rodless cavity and the rod cavity of the left push-in hydraulic cylinder (107). The inflation air circuit includes a high-pressure inflation air pump (116), a two-position three-way solenoid valve (117), inflation through hole (110), rodless cavity of the gas spring (101) to be assembled, and an electronic pressure gauge (118). The high-pressure inflation air pump (116), two-position three-way solenoid valve (117), inflation through hole (110), and rodless cavity of the gas spring (101) to be assembled are sequentially connected. The electronic pressure gauge (118) is set on the inflation through hole (110).
2. Right Pushing and Closing equipment :
   • Components: Right pushing and closing equipment set on the right side of the base (102), including a right pushing and closing hydraulic cylinder (114) and a guide seat set at the left end of the piston rod of the right pushing and closing hydraulic cylinder (114). A right closing mold (115) is set in the stopping mouth at the left end of the guide seat, corresponding to the right end closing of the cylinder (1).
3. Control System:
   • Right Pushing and Closing Oil Circuit: The control system includes a right pushing and closing oil circuit, identical in structure to the left pushing and closing oil circuit.
4. Control System Components:
   • Time Relays or Logic Controllers: Includes time relays or logic controllers for controlling the on/off timing and sequence of the three-position four-way solenoid valve (122) for clamping, two-position four-way solenoid valve (120) for closing push, and two-position three-way solenoid valve (117).
5. Additional Stability Features:
   • Balance Circuit and Bidirectional Hydraulic Lock: A balance circuit (123) or a bidirectional hydraulic lock is set between the three-position four-way solenoid valve (122) for clamping and the rod cavity of the lower pressure cylinder or hydraulic cylinder (103). A replenishment oil circuit is set between the oil tank and the rodless cavity of the lower pressure cylinder or hydraulic cylinder (103), including a compensation check valve (124).
6. Intermediate Function of Solenoid Valve:
   • M-type Intermediate Function: The intermediate function of the three-position four-way solenoid valve (122) for clamping is M-type.