Sleeve type air spring automatic rewinding machine and working method thereof

Abstract

The invention discloses a sleeve type air spring automatic rewinding machine which comprises a positioning plate and a limiting plate which are oppositely arranged on a rack to form a mounting station, a piston plug is arranged on the inner side of the positioning plate and used for sleeving and positioning, a supporting block is arranged on the inner side of the limiting plate and used for supporting and positioning, and the sleeve type air spring automatic rewinding machine further comprises an inflation and deflation control mechanism, a horizontal pushing mechanism and an outward turning mechanism. The horizontal pushing mechanism can drive the piston plug to move so that the air bag can be compressed and rewound, the outward turning mechanism can push a finished product out of a mounting station, and a corresponding working method is provided. The device achieves the effects that the sleeve type air spring is automatically rewound and installed, the device can adapt to semi-finished products with different lengths and sizes, finished air spring products are conveniently discharged, and the production efficiency and quality are improved.

Description

Technical Field

[0001] The present application relates to the field of air spring processing, and in particular to a sleeve-type air spring automatic rewinding machine and its working method. Background Art

[0002] In the field of mechanical manufacturing, the production and manufacturing of air springs is an important part. With the continuous development of industrial technology, air springs are increasingly widely used in many industries such as automobiles and rail transit, and their performance and quality directly affect the operation stability and comfort of related equipment. For the production of air springs, an efficient and accurate rewinding and installation process is particularly crucial, which not only relates to the production efficiency of products but also has an important impact on the consistency of products. In recent years, although relevant enterprises have continuously invested in research and development in air spring production equipment, there is still much room for improvement. How to optimize the production process and improve production efficiency has become an urgent problem in the industry.

[0003] In the past air spring rewinding and installation process, most traditional equipment used the method of vertically inflating and rewinding the semi-finished air spring. Among them, the semi-finished air spring refers to that the piston end installation work at the lower part of the air spring and the end cover installation work at the upper part of the air spring have been completed, but the air spring has not yet completed the compression and rewinding work. In the traditional method, employees need to hold the semi-finished air spring by hand and straighten it. The whole operation process is relatively cumbersome and requires high operation skills from employees. Specifically, while straightening the semi-finished air spring, employees also need to ensure the smooth progress of the inflation process, which undoubtedly increases the difficulty and complexity of the operation. Moreover, due to the certain uncertainty of manual operation by employees, it is easy to cause inconsistent rewinding effects of products, thereby affecting the overall quality of products.

[0004] However, the traditional method of vertically inflating and rewinding the semi-finished air spring with traditional equipment and relying on manual operation by employees has obvious defects. On the one hand, the production efficiency is low. The operation method of employees holding and straightening the product by hand limits the production speed and is difficult to meet the needs of large-scale production, easily forming bottlenecks on the production line and affecting the smoothness of the entire production process. On the other hand, due to the uncertainty of manual operation, it is difficult to ensure the consistency of products, and there may be situations where the rewinding effects of some products are not good, thus affecting the quality and market competitiveness of products. Summary of the Invention

[0005] In order to improve the production efficiency and product consistency of air springs, the present application provides a sleeve-type air spring automatic rewinding machine and its working method.

[0006] The sleeve-type air spring automatic rewinding machine provided by the present application adopts the following technical solutions: A sleeve-type air spring automatic rewinding machine includes: A frame, wherein a positioning plate and a limiting plate are disposed on the upper surface of the frame, and a gap between the positioning plate and the limiting plate forms an installation station for performing the rewinding installation of the semi-finished air spring; A piston plug, which is arranged on the inner side of the positioning plate and is used for sleeve positioning of the piston end of the semi-finished air spring; A support block, which is arranged on the inner side of the limit plate and is used to support and position the end cover of the semi-finished air spring; The inflation and deflation control mechanism is used to inflate and deflate the air bag of the semi-finished air spring; The push mechanism is used to drive the piston plug to move toward the limit plate to achieve the purpose of compressing and rewinding the airbag of the semi-finished air spring to form a finished air spring; The outward turning mechanism is arranged at the bottom of the installation station and is used to push the finished air spring out of the installation station after compression and rewinding.

[0007] By adopting the above technical solution, horizontal rewinding and installation of semi-finished air springs can be achieved. There is no need for employees to hold the product by hand, which is convenient to operate and improves production efficiency. The piston plug and the support block respectively position and support the piston end and end cover of the semi-finished air spring, ensuring the consistency of product installation. The inflation and deflation control mechanism can inflate and deflate the airbag, the push mechanism can compress the airbag, and the eversion mechanism can push out the finished product. The whole process has a high degree of automation, which further improves production efficiency and product quality.

[0008] Preferably, the horizontal push mechanism includes a horizontally arranged rewinding cylinder, the rewinding cylinder is installed on the outer side of the positioning plate, and the piston rod of the rewinding cylinder is arranged in the direction of the limit plate and is detachably connected to the piston plug.

[0009] By adopting the above technical solution, the horizontally arranged rewinding cylinder can provide a stable thrust for the movement of the piston plug, making the airbag compression and rewinding process of the semi-finished air spring smoother; the rewinding cylinder is installed on the outside of the positioning plate and is detachably connected to the piston plug, which is convenient for later maintenance and replacement of parts, further improving the convenience of equipment operation and production efficiency, and is conducive to ensuring product consistency.

[0010] Preferably, the distance between the limit plate and the positioning plate is adjustable to accommodate semi-finished air springs of different lengths.

[0011] By adopting the above technical solution, the sleeve-type air spring automatic rewinding machine can adapt to air spring semi-finished products of different lengths and sizes, thereby improving the versatility and applicability of the equipment, thereby improving production efficiency and ensuring the consistency of product processing under different specifications.

[0012] Preferably, the support block is arranged in a U-shaped groove shape with the notch facing upwards.

[0013] By adopting the above technical solution, the support block with a U-shaped groove and a notch facing upward can better support and position the end cover of the semi-finished air spring, which is conducive to the smooth ejection of the finished air spring by the subsequent outward turning mechanism, thereby improving the equipment operation convenience and production efficiency.

[0014] Preferably, the inflation and deflation control mechanism includes an inflation and deflation control cabinet and an intake valve and an exhaust valve arranged at the piston plug. The inflation and deflation control cabinet is connected to the intake valve and the exhaust valve. When the piston end of the semi-finished air spring is sleeved with the piston plug, the intake nozzle of the airbag is connected to the intake valve, and the exhaust nozzle of the airbag is connected to the exhaust valve.

[0015] By adopting the above technical solution and using the inflation and deflation control cabinet to control the air inlet valve and the exhaust valve, the air bag of the semi-finished air spring can be accurately inflated and deflated to achieve the expansion and rewinding of the air bag, ensuring that the semi-finished air spring is smoothly compressed and rewound into a finished product, thereby improving the degree of automation of the production process and the product quality.

[0016] Preferably, the outward turning mechanism includes a flip door hinged on the surface of the frame and a push assembly for driving the flip door to flip, and the finished air spring after compression and rewinding is pushed out of the installation station by flipping the flip door from bottom to top.

[0017] By adopting the above technical solution, the outward turning mechanism is provided with a flip door and a push assembly hinged on the surface of the frame, so that the flip door can be flipped from bottom to top, and the finished air spring after compression and rewinding can be smoothly pushed out of the installation station, thereby improving the degree of automation and production efficiency of the equipment, reducing manual intervention, and ensuring product consistency.

[0018] Preferably, a through groove for accommodating the flip door is formed through the surface of the frame. When the flip door is in a horizontal state, the flip door is received in the through groove, and the surface of the flip door is flush with the surface of the frame.

[0019] By adopting the above technical solution, a through groove for accommodating the flip door is opened on the surface of the frame. When the flip door is horizontal, it is received in the through groove and the surface is flush with the surface of the frame, thereby avoiding affecting the placement and rewinding operation of the semi-finished air spring at the installation station, making the equipment structure more compact and reasonable, and further improving the convenience of equipment operation.

[0020] A working method of a sleeve-type air spring automatic rewinding machine comprises the following steps: The semi-finished air spring is in place: the piston end of the semi-finished air spring is sleeved and positioned with the piston plug, and the end cover of the semi-finished air spring is placed on the support block. Under the support of the piston plug and the support block, the semi-finished air spring is in place at the installation station in a horizontal state, and the inflation and deflation control mechanism is connected to the inside of the airbag of the semi-finished air spring; Installation of the semifinished air spring by rewinding: The inflation and deflation control mechanism inflates the inside of the airbag of the semifinished air spring to expand the airbag. When the inflation duration reaches the preset duration, the horizontal pushing mechanism is activated and drives the piston plug to move towards the limiting plate, gradually compressing the airbag and shortening its length. After the piston plug moves a preset length, the inflation and deflation control mechanism deflates the inside of the airbag of the semifinished air spring, and the airbag loses the internal pressure support to achieve the purpose of rewinding, completing the finished air spring; Unloading of the finished air spring: The eversion mechanism is activated to push the finished air spring after compression and rewinding out of the installation station.

[0021] By adopting the above technical solutions, the semifinished air spring can be positioned at the installation station in a horizontal state, which is convenient for subsequent operations and improves the operation convenience; the inflation and deflation control mechanism is used for inflation and deflation, and cooperates with the horizontal pushing mechanism to push the piston plug to compress the airbag, so that the rewinding and installation of the semifinished air spring can be efficiently completed to form the finished air spring, improving the production efficiency; finally, the finished product is pushed out of the installation station by the eversion mechanism to realize automatic unloading, further improving the production efficiency, and at the same time, the product consistency is ensured throughout the process.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. By adopting the method of horizontally placing the semifinished air spring, it avoids the need for employees to hold and align it manually, making the operation more convenient, improving the production efficiency, and preventing blockages in the production line; 2. Reducing the uncertainty of manual operations, ensuring the consistency of the rewinding effect of the product, and thus ensuring the consistency of the product; 3. The distance between the limiting plate and the positioning plate is adjustable, which can adapt to semifinished air springs of different length dimensions and improve the versatility of the equipment. Description of the Drawings

[0023] Figure 1 is an automatic rewinding machine for a sleeve-type air spring according to an embodiment of the present application.

[0024] Description of the reference numerals: 1, frame; 2, positioning plate; 3, support block; 4, installation station; 5, horizontal pushing mechanism; 6, piston plug; 7, limiting plate; 8, inflation and deflation control mechanism; 9, eversion mechanism; 91, flip door; 92, top pushing assembly; 93, hinge seat. Detailed Description of the Embodiment

[0025] The following is a further detailed description of the present application in combination with the attached Figure 1 drawings.

[0026] An embodiment of the present application discloses an automatic rewinding machine for a sleeve-type air spring. Refer to Figure 1, including a frame 1, a piston plug 6, a supporting block 3, an air charging / discharging control mechanism 8, a horizontal pushing mechanism 5 and an eversion mechanism 9. Among them, a positioning plate 2 and a limiting plate 7 are arranged on the upper surface of the frame 1, and an installation station 4 is formed between the two. The piston plug 6 and the supporting block 3 play a positioning role at the installation station 4. The air charging / discharging control mechanism 8, the horizontal pushing mechanism 5 and the eversion mechanism 9 cooperate in sequence to complete the rewinding installation of the air spring semi-finished product and the discharging of the finished product, achieving the effect of efficiently and accurately producing the air spring finished product. This is because each mechanism has a clear division of labor and can cooperate orderly, reducing manual intervention and improving the standardization and accuracy of the production process.

[0027] Specifically, the positioning plate 2 and the limiting plate 7 on the upper surface of the frame 1 are arranged opposite to each other. The positioning plate 2 and the limiting plate 7 can be made of metal materials, such as steel plates, which have good strength and stability. Among them, the positioning plate 2 can be fixed on the frame 1 by means of bolts or by welding to ensure the firmness of the connection. The limiting plate 7 is L-shaped and can move relative to the surface of the frame 1 to adjust the distance between the positioning plate 2 and the limiting plate 7. Among them, a long hole is opened in the lower part of the limiting plate 7, and a threaded hole corresponding to the long hole is opened on the upper surface of the frame 1. The limiting plate 7 is locked by passing a bolt through the long hole and threading it with the bolt hole, and the position of the limiting plate 7 can be adjusted according to the actual situation. The gap between the positioning plate 2 and the limiting plate 7 forms the installation station 4, which provides space for the rewinding installation of the air spring semi-finished product.

[0028] In this embodiment, the inner sides of the positioning plate 2 and the limiting plate 7 facing each other are their respective inner positions. The piston plug 6 is arranged at the inner position of the positioning plate 2. The piston plug 6 is generally made of rubber or plastic materials, so that the socket positioning of the piston end of the air spring semi-finished product can be better realized. The shape of the piston plug 6 is usually a cylindrical shape adapted to the piston end of the air spring, but it can also be designed with corresponding shapes according to different types of air springs. For example, if the piston end of some air springs is square, then the piston plug 6 can also be designed to be square.

[0029] The supporting block 3 is arranged at the inner side of the limiting plate 7. The supporting block 3 is arranged in a U-shaped groove shape with the notch facing upwards. This shape design can better support and position the end cover of the air spring semi-finished product. The supporting block 3 can be made of metal, such as aluminum alloy, which has a certain strength and is light in weight. The supporting block 3 can be fixed to the inner side of the limiting plate 7 by bolts or by welding. In addition to the U-shaped groove shape, the supporting block 3 can also be designed into other shapes such as V-shaped grooves that can play a role in supporting and positioning.

[0030] The air charging and discharging control mechanism 8 includes an air charging and discharging control cabinet, an intake valve and an exhaust valve provided at the piston plug 6, and the air charging and discharging control cabinet is connected to the intake valve and the exhaust valve. The air charging and discharging control cabinet can be composed of electronic control components to achieve precise control of the intake valve and the exhaust valve. The intake valve and the exhaust valve can be selected as solenoid valves, which have the characteristics of fast response speed and high control accuracy. When the piston end of the air spring semi-finished product is sleeved with the piston plug 6, the air inlet nozzle of the airbag is connected to the intake valve, and the air outlet nozzle of the airbag is connected to the exhaust valve, so that the air charging and discharging treatment of the airbag inside the air spring semi-finished product can be realized.

[0031] The flat push mechanism 5 includes a retracting cylinder arranged horizontally. The retracting cylinder is installed outside the positioning plate 2 and can be fixed to the positioning plate 2 by means of bolts or the like. The piston rod of the retracting cylinder is arranged towards the limiting plate 7 and is detachably connected to the piston plug 6. The detachable connection method can be threaded connection, pin connection, etc. to ensure the firmness and stability of its installation. By the telescopic movement of the piston rod of the retracting cylinder, the piston plug 6 can be driven to move towards the limiting plate 7 to achieve the purpose of compressing and retracting the airbag of the air spring semi-finished product, forming the air spring finished product. Here, the flat push mechanism 5 can also be replaced by an electric push rod or other mechanisms that can achieve linear pushing instead of the retracting cylinder.

[0032] The outward turning mechanism 9 includes a turning door 91 hinged to the surface of the frame 1 and a top push assembly 92 for driving the turning door 91 to turn. The turning door 91 can be made of a thin metal plate and is hinged to the surface of the frame 1 by means of hinges or the like. The top push assembly 92 can be a cylinder or a hydraulic cylinder, etc. An articulated seat 93 is installed inside the frame 1. The cylinder body of the top push assembly 92 is hinged to the frame 1 through the articulated seat 93, and the cylinder piston rod is hinged to the bottom of the turning door 91 through a ball joint structure. By the elongation of the cylinder, the turning door 91 is driven to turn from bottom to top to push out the air spring finished product after the compression and retraction is completed from the installation station 4. A through groove for accommodating the turning door 91 is penetrated on the surface of the frame 1. When the turning door 91 is in a horizontal state, the turning door 91 is received in the through groove, and the surface of the turning door 91 is flush with the surface of the frame 1, which can avoid affecting the placement and retraction operation of the air spring semi-finished product at the installation station 4.

[0033] The implementation principle of this embodiment is as follows: the sleeve-type air spring automatic rewinding machine has changed the traditional vertical inflation and rewinding method that relies on manual operation through reasonable structural design and the coordinated work of various mechanisms. The positioning plate 2 and the limit plate 7 on the frame 1 determine the installation station 4, the piston plug 6 and the support block 3 accurately position the semi-finished air spring, the inflation and deflation control mechanism 8 accurately controls the inflation and deflation of the airbag, the push mechanism 5 realizes the compression and rewinding of the airbag, and the eversion mechanism 9 pushes the finished product out. The whole process has a high degree of automation, which reduces the uncertainty of manual operation, improves production efficiency, and ensures the consistency of the product. Compared with traditional equipment, it has been significantly improved and upgraded.

[0034] In other embodiments, the push mechanism 5 uses an electric push rod instead of the rewinding cylinder, and the electric push rod includes components such as a motor, a screw and a push rod. The motor drives the screw to rotate, thereby driving the push rod to move in a straight line. The motor can be a stepper motor, which has good control accuracy and stability. The screw and the push rod can be made of metal to ensure their strength and wear resistance. The electric push rod is fixed to the outside of the positioning plate 2 through a mounting seat, and the push rod is detachably connected to the piston plug 6. The electric push rod can achieve precise displacement control, and can also drive the piston plug 6 to move toward the limit plate 7 to achieve air bag compression and rewinding of the semi-finished air spring.

[0035] The implementation principle of this embodiment is: an electric push rod is used as the horizontal push mechanism 5, and the principle of the motor driving the screw rod is used to achieve precise control of the movement of the piston plug 6. Compared with the rewinding cylinder, the electric push rod has higher displacement accuracy and can better adapt to different production needs, further improving the accuracy and stability of the air spring rewinding, while also providing more flexibility for the control of the equipment, improving production efficiency and product quality to a certain extent, and is an optimization and improvement of the existing technology.

[0036] The working method of the sleeve-type air spring automatic rewinding machine provided in the embodiment of the present application comprises the following steps: S1, the semi-finished air spring is in place: the employee adjusts the distance between the limit plate 7 and the positioning plate 2 according to the different lengths of the semi-finished air spring, and then fixes the limit plate 7 on the frame 1. Next, the piston end of the semi-finished air spring is socketed with the piston plug 6 for positioning. After that, the end cover frame of the semi-finished air spring is placed on the support block 3. Since the support block 3 is in the shape of a U-shaped groove and the notch is facing upward, it can play a good supporting and positioning role for the end cover. With the support of the piston plug 6 and the support block 3, the semi-finished air spring is in place at the installation station 4 in a horizontal state. At the same time, the inflation and deflation control mechanism 8 is connected to the inside of the airbag of the semi-finished air spring, specifically, the air inlet nozzle of the airbag is connected to the air inlet valve at the piston plug 6, and the exhaust nozzle of the airbag is connected to the exhaust valve at the piston plug 6.

[0037] S2, rewinding and installation of the semi-finished air spring: the operator presses the start button on the frame 1, and the inflation and deflation control mechanism 8 starts to work. The inflation and deflation control cabinet controls the air intake valve to open, and inflates the airbag inside the semi-finished air spring to expand the airbag. The inflation and deflation control cabinet has a built-in timing function. When the inflation time reaches the preset time, the horizontal push mechanism 5 starts, where the preset time is one second. If the horizontal push mechanism 5 is a rewinding cylinder, the air intake pipeline valve of the rewinding cylinder is opened, and the piston rod extends to push the piston plug 6 to move toward the limit plate 7; if the horizontal push mechanism 5 is an electric push rod, the motor starts and drives the push rod to push the piston plug 6 to move. As the piston plug 6 moves, the airbag is gradually compressed and the length of the airbag is gradually shortened. When the piston plug 6 moves a preset length, the preset length is based on the airbag, and the inflation and deflation control cabinet controls the air intake valve to close, and at the same time opens the exhaust valve to deflate the airbag inside the semi-finished air spring. The airbag loses the internal pressure support, thereby achieving the purpose of rewinding and completing the finished air spring.

[0038] S3, unloading of finished air spring products: after the exhaust time is up, the steering valve of the rewind cylinder pipeline is controlled to change direction, the rewind cylinder piston rod retreats, and the various structures at both ends of the finished air spring are separated from the piston plug 6 and the support block 3, and fall to the surface of the frame 1. At this time, the flip door 91 is located above the air spring.

[0039] It should be emphasized that the separation of the piston plug and the air spring is due to the fact that the airbag turns from horizontal to inclined due to gravity, and the piston end separates from the plug and slides out along the guide surface. In addition, both the exhaust valve and the intake valve of the piston plug use quick-insert pneumatic connectors (such as quick connectors with a one-way valve) with the airbag nozzle, or are sealed by a sealing ring. When the finished air spring turns from horizontal to inclined, the piston plug and the airbag nozzle are also separated.

[0040] When the piston rod of the rewinding cylinder retreats to the rear end magnetic induction switch position, the outward turning mechanism 9 is activated. If the pushing component 92 of the outward turning mechanism 9 is a cylinder, the valve of the air inlet pipeline at the bottom of the cylinder is opened, and the piston rod is quickly extended to lift the flip door 91; if the pushing component 92 is a hydraulic oil cylinder, the hydraulic system supplies oil to make the piston rod extend to lift the flip door 91. The finished air spring after compression and rewinding is pushed out of the installation station 4 by flipping the flip door 91 from bottom to top, and rolls onto the conveyor belt, and the finished air spring is delivered through the conveyor belt. When the set extension time is reached, the reversing valve of the pushing component 92 is reversed, the piston rod retreats, and drives the flip door 91 to close, and the equipment returns to the standby state.

[0041] The implementation principle of this embodiment is as follows: This working method operates in the sequence of the semi-finished air spring being in place, being rewound and installed, and the finished product being unloaded, making full use of the functions of each mechanism of the sleeve-type air spring automatic rewinding machine. Through reasonable process design, the automation of the air spring production process is achieved, reducing the manual operation links and improving the production efficiency. Moreover, there is precise control in each step, such as the inflation duration, the moving distance of the piston plug 6, etc., ensuring the consistency of the product rewinding effect, improving the product quality, and having great improvements and enhancements compared with the traditional production method.

[0042] The above are all the preferred embodiments of this application. The protection scope of this application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A sleeve-type air spring automatic rewinding machine, characterized in that, Comprising: A frame (1), on the upper surface of which a positioning plate (2) and a limiting plate (7) are oppositely arranged. The gap between the positioning plate (2) and the limiting plate (7) forms an installation station (4) for performing the rewinding installation work of the air spring semi-finished product. A piston plug (6) is arranged inside the positioning plate (2) for socketing and positioning the piston end of the air spring semi-finished product. A supporting block (3) is arranged inside the limiting plate (7) for supporting and positioning the end cover of the air spring semi-finished product. An air charging and discharging control mechanism (8) for performing air charging and discharging treatment on the inside of the airbag of the air spring semi-finished product. A horizontal pushing mechanism (5) for driving the piston plug (6) to move towards the limiting plate (7) to achieve the purpose of compressing and rewinding the airbag of the air spring semi-finished product to form an air spring finished product. An outward turning mechanism (9) is arranged at the bottom of the installation station (4) and is used to push the air spring finished product after the compression and rewinding out of the installation station (4).

2. The automatic rewinding machine for sleeve-type air springs according to claim 1, characterized in that: The horizontal pushing mechanism (5) includes a horizontally arranged rewinding cylinder installed outside the positioning plate (2). The piston rod of the rewinding cylinder is arranged towards the limiting plate (7) and is detachably connected to the piston plug (6).

3. The automatic rewinding machine for sleeve-type air springs according to claim 1, characterized in that: The distance between the limiting plate (7) and the positioning plate (2) is adjustable to adapt to air spring semi-finished products of different length dimensions.

4. The automatic rewinding machine for sleeve-type air springs according to claim 1, wherein: The supporting block (3) is arranged in a U-shaped groove with the notch facing upwards.

5. The automatic rewinding machine for sleeve-type air springs according to claim 1, characterized in that: The air charging and discharging control mechanism (8) includes an air charging and discharging control cabinet, an intake valve and an exhaust valve arranged at the piston plug (6). The air charging and discharging control cabinet is connected to the intake valve and the exhaust valve. When the piston end of the air spring semi-finished product is socketed with the piston plug (6), the intake nozzle of the airbag is connected to the intake valve, and the exhaust nozzle of the airbag is connected to the exhaust valve.

6. The automatic rewinding machine for the sleeve type air spring according to claim 1, wherein: The outward turning mechanism (9) includes a turning door (91) hinged to the surface of the frame (1) and a top pushing assembly (92) for driving the turning door (91) to turn. By turning the turning door (91) from bottom to top, the air spring finished product after the compression and rewinding is pushed out of the installation station (4).

7. The automatic rewinding machine for sleeve-type air springs according to claim 6, wherein: A through groove for accommodating the turning door (91) is formed through the surface of the frame (1). When the turning door (91) is in a horizontal state, the turning door (91) is received in the through groove, and the surface of the turning door (91) is flush with the surface of the frame (1).

8. A working method of the sleeve-type air spring automatic rewinding machine according to any one of claims 1-7, characterized in that, Including the following steps: Positioning of the air spring semi-finished product: The piston end of the air spring semi-finished product is socketed and positioned with the piston plug (6), and the end cover of the air spring semi-finished product is placed on the supporting block (3). Under the supporting action of the piston plug (6) and the supporting block (3), the air spring semi-finished product is positioned at the installation station (4) in a horizontal state, and the air charging and discharging control mechanism (8) is connected to the inside of the airbag of the air spring semi-finished product. Rewinding and installation of the semi-finished air spring: the air filling and discharging control mechanism (8) inflates the airbag of the semi-finished air spring to expand the airbag. When the inflation time reaches a preset time, the push mechanism (5) starts and drives the piston plug (6) to move toward the limit plate (7) to gradually compress the airbag and gradually shorten the airbag. When the piston plug (6) moves a preset distance, the air filling and discharging control mechanism (8) deflates the airbag of the semi-finished air spring, and the airbag loses the internal pressure support to achieve the purpose of rewinding, thus completing the finished air spring. Unloading of finished air spring products: the outward turning mechanism (9) is activated to push the finished air spring products after compression and rewinding out of the installation station (4).

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