A ring pushing machine and ring pushing method for air spring processing

Abstract

The present invention discloses a ring-pushing machine and a ring-pushing method for processing air springs. The ring-pushing machine includes a top plate, an upper sealing mechanism, an upper frame, a lower frame, a transmission mechanism, an expansion mechanism, a sealing plate, and a ring-pushing mechanism. The upper sealing mechanism is arranged on the top plate through a bracket, the upper frame is horizontally arranged below the upper sealing mechanism, the lower frame is horizontally arranged below the upper frame and is connected to the bracket through a first lifting mechanism, the upper end of the lower frame is provided with a sealing ring that can extend into the upper frame, the transmission mechanism is arranged on the top plate, and is transmission-connected to a second lifting mechanism and a third lifting mechanism, the expansion mechanism is arranged above the second lifting mechanism and is connected thereto, the sealing plate is arranged above the third lifting mechanism and is connected thereto, the ring-pushing mechanism is arranged on the sealing plate, and an air inlet channel is provided on the sealing plate. The ring-pushing machine and the ring-pushing method of the present invention will not damage the inner cord fabric of the bladder skin during the expansion process, avoid distortion caused by stretching of the bladder skin, and improve the qualified rate of the ring-pushing machine.

Description

Technical Field

[0001] The present invention relates to the field of automobile parts processing equipment, and more particularly to a ring pushing machine and a ring pushing method for processing air springs. Background Art

[0002] In the automotive air spring production process, a metal ring with an outer diameter larger than its inner diameter is coaxially installed within a cylindrical bladder. Under normal pressure, the metal ring and the bladder are sealed within the same space. Since the bladder is typically made of rubber cord fabric, the hardness of the bladder varies depending on the structure of the cord, resulting in hard and soft bladders. Soft bladders are relatively easy to stretch, while hard bladders are difficult to stretch. For hard bladders, a hydraulic cylinder is typically used to expand the bladder opening at one end, and then an electric cylinder is used to forcefully push the metal ring into the bladder through the expanded end. For soft bladders, a cylindrical inflatable bladder is typically used to expand the bladder at both ends. Upper and lower hollow cones are then used to grip the bladder at both ends, and an electric cylinder is used to push the metal ring into the bladder. The equipment used in both of these methods is simple and requires minimal precision, but it also has significant disadvantages. For hard bladders, using a hydraulic cylinder to expand the bladder opening can damage the cord fabric inside the bladder, causing distortion due to stretching, and resulting in a low pass rate for the ring pusher. For soft bladder leather, due to the simultaneous biting of the upper and lower edges, the size requirements for the bladder leather are relatively high. Since the upper and lower edges are inflated by the airbags at the same time, the height requirements after inflation are strict, and the smoothness of the inner surface of the bladder leather must be consistent, and bladder leathers of different qualities cannot be compatible. Summary of the Invention

[0003] The purpose of the present invention is to provide a ring pushing machine and a ring pushing method for hard bladder skins, which will not cause damage to the cord fabric inside the bladder skin during the expansion process, avoid distortion caused by stretching the bladder skin, and improve the qualified rate of the ring pushing.

[0004] To achieve these objects and other advantages of the present invention, a push ring machine for processing air springs is provided, comprising a top plate, an upper sealing mechanism, an upper frame, a lower frame, a conveying mechanism, an expanding mechanism, a sealing plate, and a push ring mechanism, wherein the upper sealing mechanism is arranged on the top plate via a bracket, the upper frame is horizontally arranged below the upper sealing mechanism, and a limiting cylinder is vertically provided at its upper end and communicated with its central portion, the lower frame is horizontally arranged below the upper frame and connected to the bracket via a first lifting mechanism, the upper end of the lower frame is provided with a sealing ring that can extend into the upper frame, the conveying mechanism is arranged on the top plate and is transmission-connected to a second lifting mechanism and a third lifting mechanism, the conveying mechanism selectively conveys one of the second lifting mechanism and the third lifting mechanism to the bottom of the lower frame, the expanding mechanism is arranged above and connected to the second lifting mechanism, the sealing plate is arranged above and connected to the third lifting mechanism, the push ring mechanism is arranged on the sealing plate, and at least one air inlet channel is provided on the sealing plate, and when the sealing plate contacts the lower frame, the air inlet channel communicates with the interior of the lower frame.

[0005] Preferably, in the push ring machine for air spring processing, the upper sealing mechanism includes a base plate, a plurality of clamping units, a cylindrical piston and a lifting unit, the base plate is connected to the bracket, and is provided with a positioning hole coaxial with the sealing ring, a plurality of clamping units are evenly distributed on the upper end of the base plate along the circumference of the positioning hole, the lifting unit is arranged above the base plate and connected to the bracket, and the piston is coaxially arranged above the positioning hole and is transmission-connected to the lifting unit.

[0006] Preferably, in the push ring machine for air spring processing, the clamping unit includes a first telescopic cylinder and a clamping member, the push rod of the first telescopic cylinder is arranged along the radial direction of the positioning hole and is connected to the clamping member, and the end of the clamping member away from the first telescopic cylinder is arc-shaped, and multiple first telescopic cylinders drive the corresponding clamping members to move to a clamping position forming a circular ring.

[0007] Preferably, in the push ring machine for processing air springs, the sealing ring is in the shape of a truncated cone with a larger upper portion and a smaller lower portion, and a truncated cone-shaped notch corresponding to the sealing ring is provided on the inner wall of the lower frame.

[0008] Preferably, in the push ring machine for processing air springs, the first lifting mechanism includes a plurality of second telescopic cylinders, the cylinder bodies of the second telescopic cylinders are connected to the bracket, and the push rods thereof are vertically arranged downward and connected to the lower frame.

[0009] Preferably, in the ring-pushing machine for processing air springs, the diameter-expanding mechanism is an expansion airbag.

[0010] Preferably, in the ring-pushing machine for processing air springs, a sealing ring corresponding to the lower end opening of the lower frame is provided at the upper end of the sealing plate.

[0011] Preferably, in the push ring machine for processing air springs, the upper end of the sealing plate is provided with a groove located in the sealing ring, the push ring mechanism passes through the bottom wall of the groove and is connected to the sealing plate, and the side wall of the sealing plate is provided with at least one through hole connected to the groove, and the through hole constitutes the air intake channel.

[0012] Preferably, in the push ring machine for processing air springs, the push ring mechanism includes a support member, a third telescopic cylinder and a support frame, the support member is arranged in the groove, the support frame is connected to the third lifting mechanism, the cylinder body of the third telescopic cylinder is connected to the support frame, and its push rod is arranged vertically upward and connected to a sliding rod, the sliding rod passes through the bottom wall of the groove and is slidably sealed with the sealing plate, and its upper end is connected to the support member.

[0013] Preferably, in the push-ring machine for processing air springs, the support member includes a disc and a plurality of positioning rods circumferentially distributed on the upper end of the disc, the upper ends of the positioning rods are rotatably connected to a rotating member, and the upper end of the disc is also provided with a plurality of support rods equal in number to and corresponding to the positioning rods. When the rotating member rotates to a horizontal position, it rests on the corresponding support rod, and an arc-shaped fixing groove is provided on the end of the rotating member away from the support rod.

[0014] The beneficial effects of the present invention are:

[0015] 1. The ring pushing machine of the present invention seals and fixes the upper end opening of the bladder skin through the upper sealing mechanism, so that the bladder skin remains vertical, ensuring the parallelism of the bladder skin and ring during the ring pushing process, and improving the qualified rate of the ring pushing.

[0016] 2. The ring pushing machine of the present invention will not cause damage to the inner cord fabric of the bladder skin during the expansion process, thus avoiding the distortion of the bladder skin caused by stretching and improving the qualified rate of the ring pushing machine.

[0017] 3. During the ring pushing process, the ring pushing machine of the present invention allows the bladder skin to expand freely by inflation, which facilitates the movement of the metal ring in the bladder skin and improves the qualified rate of the ring pushing.

[0018] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the ring pushing machine of the present invention;

[0020] Figure 2 The front view of the ring pusher according to the present invention

[0021] Figure 3 It is a structural schematic diagram of the upper sealing mechanism of the present invention;

[0022] Figure 4 This is a schematic diagram of the connection between the upper frame and the lower frame of the present invention;

[0023] Figure 5 Schematic diagram of the structure of the upper frame of the present invention;

[0024] Figure 6 Schematic diagram of the structure of the lower frame of the present invention;

[0025] Figure 7 This is a schematic diagram of the connection structure between the upper frame and the sealing ring according to the present invention; Figure 8 This is a schematic structural diagram of the sealing plate of the present invention;

[0026] Figure 9 It is a structural schematic diagram of the push ring mechanism described in the present invention.

[0027] Among them, 1-top plate; 2-upper sealing mechanism; 201-bottom plate; 202-piston; 203-lifting unit; 204-first telescopic cylinder; 205-clamping member; 3-upper frame; 301-limiting cylinder; 4-lower frame; 401-sealing ring; 5-transmission mechanism; 6-expansion mechanism; 7-sealing plate; 701-sealing ring; 702-groove; 703-through hole; 8-push ring mechanism; 801-support member; 802-third telescopic cylinder; 803-support frame; 811-disc; 812-positioning rod; 813-rotating member; 814-support rod; 815-fixed groove; 9-first lifting mechanism; 901-second telescopic cylinder; 10-second lifting mechanism; 11-third lifting mechanism. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0029] It should be noted that, in the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] like Figure 1-Figure 7As shown, an embodiment of the present invention provides a push-ring machine for air spring processing, comprising a top plate 1, an upper sealing mechanism 2, an upper frame 3, a lower frame 4, a conveying mechanism 5, an expanding mechanism 6, a sealing plate 7 and a push-ring mechanism 8, wherein the upper sealing mechanism 2 is arranged on the top plate 1 through a bracket, the upper frame 3 is horizontally arranged below the upper sealing mechanism 2, and a limiting cylinder 301 connected to the middle thereof is vertically provided at the upper end thereof, the lower frame 4 is horizontally arranged below the upper frame 3 and is connected to the bracket through a first lifting mechanism 9, the upper end of the lower frame 4 is provided with a sealing ring 401 which can extend into the upper frame 3, and the conveying mechanism 5 is provided with a sealing ring 401 which can extend into the upper frame 3, and the conveying mechanism 5 is provided with a sealing ring 401 which can extend into the upper frame 3. The conveying mechanism 5 is arranged on the top plate 1 and is transmission-connected to the second lifting mechanism 10 and the third lifting mechanism 11. The conveying mechanism 5 selectively conveys the second lifting mechanism 10 and the third lifting mechanism 11 to the bottom of the lower frame 4. The diameter expansion mechanism 6 is arranged above the second lifting mechanism 10 and connected thereto. The sealing plate 7 is arranged above the third lifting mechanism 11 and connected thereto. The push ring mechanism 8 is arranged on the sealing plate 7. The sealing plate 7 is provided with at least one air intake channel. When the sealing plate 7 conflicts with the lower frame 4, the air intake channel is connected to the interior of the lower frame 4.

[0031] In this embodiment, the bladder skin is manually passed vertically through the upper frame 3 and the lower frame 4. The upper frame 3 and the lower frame 4 can be coaxial annular frames. The upper end of the bladder skin is passed upward through the lower frame 4, the upper frame 3 and the limiting cylinder 301 in sequence, and finally extends into the upper sealing mechanism 2 and is sealed and fixed at its upper end by the upper sealing mechanism 2. The bladder skin is coaxially arranged with the limiting cylinder 301. Then the conveying mechanism 5 drives the second lifting mechanism 10 and the diameter expansion mechanism 6 to move to the bottom of the lower frame 4. The second lifting mechanism 10 drives the diameter expansion mechanism 6 to move upward into the bladder skin. The diameter expansion mechanism 6 starts to work and expands the bladder skin. At this time, the lower end opening of the bladder skin is located inside the upper frame 3, and its outer side contacts the inner side of the upper frame 3. The first lifting mechanism 9 then drives the lower frame 4 upward until the upper frame 3 and the lower frame 4 contact each other, and the two are sealed and connected. The first lifting mechanism 9 can be a plurality of second telescopic cylinders 901, the cylinder bodies of the second telescopic cylinders 901 being connected to the brackets, and the push rods thereof being arranged vertically downward and connected to the lower frame 4. During the upward movement of the lower frame 4, the sealing ring 401 moves upward and is inserted between the lower end of the bladder skin and the diameter expansion mechanism 6. Then, the diameter expansion mechanism 6 stops working and the bladder skin shrinks to its original state. At this time, its lower end opening is engaged by the sealing ring 401 and the upper frame 3. Then, the second lifting mechanism 10 drives the diameter expansion mechanism 6 downward to below the lower frame 4. Then, the conveying mechanism 5 drives the third lifting mechanism 11 and the sealing plate 7 to move below the lower frame 4. The third lifting mechanism 11 drives the sealing plate 7 upward to contact with the lower frame 4. Similarly, a sealed connection is formed between the bladder skin, the upper frame 3, and the lower frame 4. The sealed space is only connected to the outside world through the air inlet channel on the sealing plate 7. The push ring mechanism 8 and the metal ring thereon are also located within the sealed space. Connect the air inlet channel to the external inflation and deflation equipment, and inflate the enclosed space through the external inflation and deflation equipment. As the air pressure in the external inflation and deflation equipment increases, the bag skin will also be stretched. At this time, the push-ring mechanism 8 drives the metal ring to move upward. After the metal ring passes through the lower frame 4 and the upper frame 3, it reaches the installation position in the bag skin and the push-ring mechanism 8 stops working. At this time, the inflation and deflation equipment begins to deflate the enclosed space. As the air pressure in the enclosed space decreases, the bag skin will gradually return to its original state. At this time, the metal ring is fixed in the bag skin, and the push-ring mechanism 8 completes the ring pushing operation in the bag skin.

[0032] Preferably, as another embodiment of the present invention, the upper sealing mechanism 2 includes a base plate 201, a plurality of clamping units, a cylindrical piston 202 and a lifting unit 203. The base plate 201 is connected to the bracket and is provided with a positioning hole coaxial with the sealing ring 401. The plurality of clamping units are evenly distributed at the upper end of the base plate 201 along the circumference of the positioning hole. The lifting unit 203 is arranged above the base plate 201 and connected to the bracket. The piston 202 is coaxially arranged above the positioning hole and is transmission-connected to the lifting unit 203.

[0033] In this embodiment, the cylindrical bladder skin passes through the positioning hole coaxially, and the lifting unit 203 drives the piston 202 to extend coaxially downward into the upper end opening of the bladder skin. At this time, the piston 202 and the multiple clamping units are located at the same horizontal plane. Then, the multiple clamping units work simultaneously to clamp the bladder skin and the piston 202, so that the two are sealed. As one specific embodiment, the clamping unit includes a first telescopic cylinder 204 and a fan-shaped clamping member 205. The push rod of the first telescopic cylinder 204 is arranged along the radial direction of the positioning hole and is connected to the arc-shaped clamping member 205. The multiple first telescopic cylinders 204 drive the corresponding clamping members 205 to move to form a circular clamping position. When the piston 202 moves downward to the same horizontal plane as the multiple clamping members 205, the multiple first telescopic cylinders 204 drive the corresponding clamping members 205 to move to clamp the bladder skin between the multiple clamping members 205 and the piston 202.

[0034] Preferably, as another embodiment of the present invention, Figure 6-Figure 7 As shown, the sealing ring 401 is in the shape of a truncated cone with a larger upper portion and a smaller lower portion, and a truncated cone-shaped notch corresponding to the sealing ring 401 is provided on the inner wall of the lower frame 4 .

[0035] In this embodiment, the sealing ring 401 is in the shape of a truncated cone, which is larger at the top and smaller at the bottom. The upper opening of the sealing ring 401 gradually expands from top to bottom, making it easier to insert the sealing ring 401 between the bladder skin and the diameter-expanding mechanism 6. At the same time, the inner wall of the lower frame 4 is provided with a truncated cone-shaped notch corresponding to the sealing ring 401. When the sealing ring 401 is fixed in the lower frame 4, a trumpet-shaped receiving cavity is formed between the sealing ring 401 and the inner wall of the lower frame 4. In this way, when the lower end of the bladder skin is clamped by the sealing ring 401 and the lower frame 4, the lower end of the bladder skin is trumpet-shaped, which can make the clamping of the bladder skin by the sealing ring 401 and the lower frame 4 more stable.

[0036] Preferably, as another embodiment of the present invention, the diameter expansion mechanism 6 is an expansion airbag.

[0037] In this embodiment, the inflatable airbag is also called a rubber-plastic high-pressure inflatable variable-diameter airbag, which can be connected to equipment such as an air pump and an air compressor, and the radius of the airbag can be changed by inflating air into the airbag.

[0038] Preferably, as another embodiment of the present invention, a sealing ring 701 corresponding to the lower opening of the lower frame 4 is provided at the upper end of the sealing plate 7 .

[0039] In this embodiment, the sealing ring 701 is provided to make the connection between the sealing plate 7 and the lower frame 4 tighter, thereby ensuring the airtightness of the enclosed space.

[0040] Preferably, as another embodiment of the present invention, Figure 8-Figure 9As shown, the upper end of the sealing plate 7 is provided with a groove 702 located in the sealing ring 701, the push ring mechanism 8 passes through the bottom wall of the groove 702 and is connected to the sealing plate 7, and the side wall of the sealing plate 7 is provided with at least one through hole 703 connected to the groove 702, and the through hole 703 constitutes the air intake channel.

[0041] In this embodiment, the push ring mechanism 8 is arranged in the groove 702, which can ensure the airtightness of the enclosed space when the sealing plate 7 and the lower frame 4 are connected. As one of the specific implementation methods, the push ring mechanism 8 includes a support member 801, a third telescopic cylinder 802 and a support frame 803. The support member 801 is arranged in the groove 702, and the support frame 803 is connected to the third lifting mechanism 11. The cylinder body of the third telescopic cylinder 802 is connected to the support frame 803. Its push rod is arranged vertically upward and is connected to a sliding rod. The sliding rod passes through the bottom wall of the groove 702 and is slidably sealed with the sealing plate 7. Its upper end is connected to the support member 801. Figure 6 As shown, the sealing tube ensures the airtightness of the sealing plate 7, while ensuring that the push rod of the third telescopic cylinder 802 can be stably lifted and lowered in the confined space.

[0042] Preferably, as another embodiment of the present invention, the support member 801 includes a disc 811 and a plurality of positioning rods 812 distributed circumferentially on the upper end of the disc 811. The upper end of the positioning rod 812 is rotatably connected to a rotating member 813. The upper end of the disc 811 is also provided with a plurality of support rods 814 that are equal in number to and one-to-one correspond to the positioning rods 812. When the rotating member 813 rotates to a horizontal position, it rests on the corresponding support rod 814. The end of the rotating member 813 away from the support rod 814 is provided with an arc-shaped fixing groove 815.

[0043] In this embodiment, the metal ring is fixed in place by the fixing grooves 815 of the plurality of rotating members 813. When the metal ring rests on the plurality of rotating members 813, the rotating members 813 are kept horizontal by the plurality of support rods 814. As the bladder shell gradually returns to its original shape and the metal ring is fixed within the bladder shell, the push rod of the third telescopic cylinder 802 contracts, driving the support member 801 downward. Since the rotating member 813 has no limit position above it, it rotates upward, thereby disengaging the metal ring from the fixing groove 815, allowing the support member 801 to smoothly move with the metal ring.

[0044] In addition, an embodiment of the present invention further provides a ring pushing method for air spring processing, which uses the above-mentioned ring pushing machine and includes the following steps:

[0045] S1. Seal the upper opening of the capsule cover by the upper sealing mechanism 2, and keep the capsule cover in a cylindrical shape, with the lower end of the capsule cover extending into the upper frame 3;

[0046] S2, the conveying mechanism 5 drives the second lifting mechanism 10 and the diameter-expanding mechanism 6 to move to the bottom of the lower frame 4, and the second lifting mechanism 10 drives the diameter-expanding mechanism 6 upward through the lower frame 4 and the upper frame 3 and moves into the capsule skin, and the diameter-expanding mechanism 6 expands the lower half of the capsule skin to increase its radius, so that the lower end of the capsule skin contacts the inner wall of the upper frame 3;

[0047] S3, the first lifting mechanism 9 drives the lower frame 4 to move upward until it contacts the upper frame 3, and the sealing ring 401 extends between the lower end of the bladder skin and the upper frame 3, and the diameter expansion mechanism 6 returns to its original state to fix the lower end of the bladder skin through the upper frame 3 and the sealing ring 401;

[0048] S4, the second lifting mechanism 10 drives the expanding mechanism 6 to move downward to below the lower frame 4, the conveying mechanism 5 drives the third lifting mechanism 11 and the sealing plate 7 to move below the lower frame 4, and the third lifting mechanism 11 drives the sealing plate 7 to move upward until it contacts the lower frame 4, thereby sealing the lower end opening of the capsule skin;

[0049] S5. Inflate the interior of the bladder skin through the air inlet channel on the sealing plate 7 so that the bladder skin is stretched again. After the push ring mechanism 8 drives the metal ring upward to the target position in the bladder skin, the air in the bladder skin is discharged through the air inlet channel on the sealing plate 7 so that the bladder skin is restored, thereby fixing the bladder skin and the metal ring.

[0050] S6. The third lifting mechanism 11 drives the sealing plate 7 to move downward to separate from the lower frame 4, and the first lifting mechanism 9 drives the lower frame 4 to move downward to separate from the upper frame 3, so that the sealing ring 401 is separated from the bag skin, and the pushing ring operation of the bag skin is completed.

[0051] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and embodiments shown and described herein.

Claims

1. A push ring machine for air spring processing, characterized in that: The invention comprises a top plate (1), an upper sealing mechanism (2), an upper frame (3), a lower frame (4), a conveying mechanism (5), an expanding mechanism (6), a sealing plate (7) and a push ring mechanism (8), wherein the upper sealing mechanism (2) is arranged on the top plate (1) through a bracket, the upper frame (3) is arranged horizontally below the upper sealing mechanism (2), and a limiting cylinder (301) is vertically provided at its upper end and communicated with the middle thereof, the lower frame (4) is arranged horizontally below the upper frame (3) and is connected to the upper frame (3) through a first lifting mechanism (9). The lower frame (4) is connected to the bracket, and the upper end of the lower frame (4) is provided with a sealing ring (401) that can extend into the upper frame (3). The transmission mechanism (5) is arranged on the top plate (1) and is transmission-connected to the second lifting mechanism (10) and the third lifting mechanism (11). The transmission mechanism (5) transmits the second lifting mechanism (10) and the third lifting mechanism (11) to the bottom of the lower frame (4). The diameter expansion mechanism (6) is arranged above the second lifting mechanism (10) and is connected thereto. The sealing ring (401) is provided on the upper end of the lower frame (4). The plate (7) is arranged above the third lifting mechanism (11) and is connected thereto, the push ring mechanism (8) is arranged on the sealing plate (7), and the sealing plate (7) is provided with at least one air inlet channel, and when the sealing plate (7) contacts the lower frame (4), the air inlet channel is communicated with the interior of the lower frame (4); the upper sealing mechanism (2) includes a bottom plate (201), a plurality of clamping units, a cylindrical piston (202) and a lifting unit (203), the bottom plate (201) is connected to the bracket, and the bottom plate (201) is connected to the bracket. A positioning hole coaxial with the sealing ring (401) is provided on the bottom plate (201), and a plurality of clamping units are evenly distributed on the upper end of the bottom plate (201) along the circumference of the positioning hole. The lifting unit (203) is arranged above the bottom plate (201) and connected to the bracket. The piston (202) is coaxially arranged above the positioning hole and is transmission-connected to the lifting unit (203). The sealing ring (401) is in the shape of a truncated cone with a larger upper portion and a smaller lower portion. The inner wall of the lower frame (4) is provided with a truncated cone-shaped notch corresponding to the sealing ring (401).

2. A ring pushing machine for air spring processing according to claim 1, characterized in that: The clamping unit comprises a first telescopic cylinder (204) and a clamping member (205); a push rod of the first telescopic cylinder (204) is arranged along the radial direction of the positioning hole and is connected to the clamping member (205); an end of the clamping member (205) away from the first telescopic cylinder (204) is arc-shaped; a plurality of first telescopic cylinders (204) drive the corresponding clamping members (205) to move to a clamping position forming a circular ring.

3. A ring pushing machine for air spring processing according to claim 1, characterized in that: The diameter expansion mechanism (6) is an expansion airbag.

4. A ring pushing machine for processing air springs according to claim 1, characterized in that: The upper end of the sealing plate (7) is provided with a sealing ring (701) corresponding to the lower end opening of the lower frame (4).

5. A ring pushing machine for processing air springs according to claim 4, characterized in that: The upper end of the sealing plate (7) is provided with a groove (702) located in the sealing ring (701); the push ring mechanism (8) passes through the bottom wall of the groove (702) and is connected to the sealing plate (7); and the side wall of the sealing plate (7) is provided with at least one through hole (703) communicating with the groove (702); the through hole (703) constitutes the air intake channel.

6. A ring pushing machine for processing air springs according to claim 5, characterized in that: The push ring mechanism (8) includes a support member (801), a third telescopic cylinder (802) and a support frame (803), wherein the support member (801) is arranged in the groove (702), the support frame (803) is connected to the third lifting mechanism (11), the cylinder body of the third telescopic cylinder (802) is connected to the support frame (803), and its push rod is vertically arranged upward and connected to a sliding rod, the sliding rod passes through the bottom wall of the groove (702) and is slidably sealed with the sealing plate (7), and its upper end is connected to the support member (801).

7. A ring pushing machine for processing air springs according to claim 6, characterized in that: The support member (801) includes a disk (811), a plurality of positioning rods (812) distributed circumferentially on the upper end of the disk (811), the upper ends of the positioning rods (812) are rotatably connected to a rotating member (813), and the upper end of the disk (811) is also provided with a plurality of support rods (814) equal in number to and corresponding to the positioning rods (812). When the rotating member (813) rotates to a horizontal position, it rests on the corresponding support rod (814), and an arc-shaped fixing groove (815) is provided on one end of the rotating member (813) away from the support rod (814).

8. A ring pushing method for processing an air spring, using the ring pushing machine according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1, sealing the upper opening of the capsule skin through the upper sealing mechanism (2), and keeping the capsule skin in a cylindrical shape, with the lower end of the capsule skin extending into the upper frame (3); S2, the conveying mechanism (5) drives the second lifting mechanism (10) and the diameter expansion mechanism (6) to move to the bottom of the lower frame (4), the second lifting mechanism (10) drives the diameter expansion mechanism (6) to pass through the lower frame (4) and the upper frame (3) upward and move into the capsule skin, and the diameter expansion mechanism (6) is used to expand the lower half of the capsule skin to increase its radius, so that the lower end of the capsule skin contacts the inner wall of the upper frame (3); S3, the first lifting mechanism (9) drives the lower frame (4) to move upward until it contacts the upper frame (3), and the sealing ring (401) extends between the lower end of the bladder skin and the upper frame (3), and the diameter expansion mechanism (6) returns to its original state to fix the lower end of the bladder skin through the upper frame (3) and the sealing ring (401); S4, the second lifting mechanism (10) drives the diameter expansion mechanism (6) to move downward to below the lower frame (4), the conveying mechanism (5) drives the third lifting mechanism (11) and the sealing plate (7) to move below the lower frame (4), and the third lifting mechanism (11) drives the sealing plate (7) to move upward to contact with the lower frame (4) to seal the lower end opening of the bag skin; S5, inflating the interior of the bladder skin through the air inlet channel on the sealing plate (7) so that the bladder skin is stretched again, and after the push ring mechanism (8) drives the metal ring to move upward to the target position in the bladder skin, the air in the bladder skin is discharged through the air inlet channel on the sealing plate (7) so that the bladder skin is restored, thereby fixing the bladder skin and the metal ring; S6. The third lifting mechanism (11) drives the sealing plate (7) to move downward to separate from the lower frame (4), and the first lifting mechanism (9) then drives the lower frame (4) to move downward to separate from the upper frame (3), so that the sealing ring (401) is separated from the bladder skin, thus completing the bladder skin push ring operation.

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