Tool for dismounting air spring sealing cover

Abstract

The utility model discloses a kind of tool for air spring sealing cover disassembly, characteristics are as follows: positioning mechanism, for positioning and fixed air spring body of having removed snap spring;Pressing mechanism is set in the top of the positioning mechanism, for when inflating to sealing cover Downward constraint force is applied, prevent it from bouncing out;Inflating mechanism, for filling gas into air spring body, make internal air pressure increase, so that the sealing cover is ejected upwards, realize disassembly.Advantages are through the cooperation of pressing mechanism and inflating mechanism, using the characteristics that air spring itself can be inflated by inflating mechanism, effectively solve the technical problem that "having removed snap spring but because sealed air chamber leads to the sealing cover of air spring difficult to disassemble".

Description

Technical Field

[0001] This utility model relates to the field of air spring technology, and in particular to a tooling for disassembling an air spring sealing cover. Background Technology

[0002] Air springs are now widely used in new energy vehicles. The sealing cap on the air spring is a key component. It mainly works with the air spring's air bladder and piston to form a closed, inflatable and deflated air chamber, thereby ensuring that compressed air can be reliably sealed within the air spring's cavity to maintain normal operation and load-bearing capacity.

[0003] The basic structure of the sealing cover of the existing air spring is as follows: Figure 1 As shown, the device includes a sealing cover body A1. A connecting portion A2 for fixed installation with the vehicle body is provided at the top center of the sealing cover body A1. The side of the sealing cover body A1 has an annular retaining ring groove A3 and a sealing groove. A sealing ring A5 is fitted into the sealing groove, and the retaining ring groove A3 is positioned above the sealing groove. During product assembly and production, the sealing cover assembly is often a later process. During assembly, the sealing cover body A1 is aligned with the opening of the metal ring B on the top of the airbag assembly, and pressed in using equipment to ensure a tight fit between the sealing ring and the inner wall of the metal ring B. After the sealing cover body A1 is pressed into the designated position, a retaining ring C is embedded in the retaining ring groove A3. Because the natural outer diameter of the retaining ring C is larger than the inner diameter of the metal ring B, when the retaining ring C is inserted, its elastic tension causes it to expand outwards and tightly clamp onto the inner side of the metal ring B, thus achieving the fixed installation of the sealing cover on the air spring. During assembly, the retaining ring C may not be installed properly, or the air spring may fail the helium test due to assembly issues with the sealing cap. In such cases, it is often necessary to remove the sealing cap. However, the air spring usually has a completely sealed space inside. After removing the retaining ring, it is difficult to pull the sealing cap out directly due to the effect of the sealing ring A5. This results in disassembly difficulties, time-consuming and labor-intensive processes. Furthermore, manual forced disassembly can easily damage the product, leading to its scrapping. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a tooling for disassembling an air spring sealing cover, so as to achieve convenient and quick disassembly of the air spring sealing cover.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A tooling for disassembling an air spring sealing cover includes: Positioning mechanism, used to position and fix the air spring body; A pressing mechanism, located above the positioning mechanism, is used to apply a downward restraining force to the sealing cap during inflation to prevent it from popping out. An inflation mechanism is used to inflate the air spring body with gas, thereby increasing the internal air pressure and pushing the sealing cover upward to achieve disassembly.

[0006] The positioning mechanism includes a positioning plate and a support frame; The positioning plate is provided with a positioning cavity with a side opening and extending vertically, which is used to accommodate and radially position the air spring body. The support frame is fixedly installed below the positioning cavity. The support frame has a vertically penetrating chamber that communicates with the positioning cavity. The side of the chamber has an opening corresponding to the side opening of the positioning plate. The chamber has an inwardly protruding support wall for supporting the relevant parts of the air spring body. A stop block is hinged to the side opening of the positioning plate, and the stop block can be rotated to close or open the side opening. The air spring body is inserted through the side opening, and the relevant parts of the air spring body are supported by the support bracket. Then, the stop block is rotated to close the side opening, thus completing the radial constraint and axial limit of the air spring body. After assembly, the part of the air spring body with the sealing cover is located above the positioning plate, so that the sealing cover is in the position to be pressed and ejected.

[0007] The support bracket is detachably and fixedly installed on the lower end surface of the positioning plate.

[0008] The first end of the stop block is rotatably mounted on one end of the side opening, and a locking seat is provided at the other end of the side opening. The second end of the stop block is provided with a locking part, and the locking seat is provided with a locking member that cooperates with the locking part. When the stop block is rotated to the position that closes the side opening, the stop block is reliably locked by operating the locking member to engage with the locking part of the stop block.

[0009] The first end of the stop block is rotatably mounted on one end of the side opening via a pivot.

[0010] The locking part is a locking hole, the locking element is a positioning pin, and the locking seat is provided with a pin hole for the positioning pin to pass through. When the stop block is rotated to the closed position, the locking hole and the pin hole are aligned, and the positioning pin is inserted to achieve locking.

[0011] The pressing mechanism includes a pressing cylinder and a pressing head. The pressing head is connected to the piston rod of the pressing cylinder. The pressing cylinder drives the pressing head to move up and down to press or release the sealing cover.

[0012] The pressure head has an internal insertion cavity with a lower opening, which can be used to accommodate and accommodate the upward-protruding connecting portion of the top of the sealing cap body.

[0013] The positioning mechanism may also be equipped with a safety limiting sleeve that can be moved up and down. The safety limiting sleeve can be driven to move downward and press against the top of the air spring body. The interior of the safety limiting sleeve is hollow. When it is pressed down into place, it can accommodate the entire sealing cover in its internal space, thereby limiting the movement trajectory of the sealing cover when it is pushed out and preventing the sealing cover from flying out and injuring people.

[0014] The positioning plate is equipped with a drive plate that can move up and down via a cylinder, and the safety limit sleeve is detachably connected to the drive plate via a quick-release structure.

[0015] The pressure head is coaxially arranged inside the safety limiting sleeve, which can move up and down; the inside of the safety limiting sleeve is provided with a guide channel for guiding the up and down movement of the pressure head.

[0016] The inflation mechanism is connected to the pressure holding valve of the air spring body via a suitable inflation connector, and gas is injected into the air spring body.

[0017] Compared with the prior art, the advantages of this utility model are: (1) By utilizing the characteristic that the air spring itself can be inflated by the inflation mechanism, compressed air is safely and evenly injected into the air spring through the inflation mechanism. The expansion of the air spring's air bladder generates axial thrust, which is used to overcome the strong static friction and sealing force between the sealing ring and the metal ring. This avoids mechanical damage such as scratches and deformation caused by manual prying of the sealing cover, sealing ring, or air bladder, and greatly reduces the scrap rate of the product during the repair process. (2) By working together with the pressing mechanism and the inflation mechanism, the controllable process of pressing, removing the retaining ring, inflating, and then releasing can accurately manage the ejection process of the sealing cap, preventing it from popping out at high speed in an instant. This ensures the safety of the operator and the smoothness and reliability of the disassembly action. (3) Effectively solves the specific technical problem of “the snap ring has been removed but it is difficult to disassemble due to the sealed air chamber”, and effectively fills the gap in the existing technology in the repair of the sealing cover. Attached Figure Description

[0018] Figure 1This is a three-dimensional structural diagram of a conventional air spring sealing cover; Figure 2 This is a first three-dimensional structural diagram of the present invention without an inflation mechanism; Figure 3 This is a schematic diagram of the second three-dimensional structure of the present invention without an inflation mechanism; Figure 4 This is a three-dimensional structural diagram of the present invention without an inflation mechanism and with the stop blocks removed; Figure 5 A three-dimensional structural diagram of the present invention with an air spring installed; Figure 6 for Figure 5 A cross-sectional structural diagram (only the working part is shown). Figure 7 A cross-sectional view of the structure of the present invention, showing the removal of the retaining ring before installing the air spring (only the working part is shown). Figure 8 This is a cross-sectional view of the present invention with the air spring installed and the retaining ring removed, showing the sealed cover in the removed state (only the working part is shown). Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] As shown in the figure, a tooling for disassembling an air spring sealing cover includes: Positioning mechanism, used to position and fix the air spring body K; The pressing mechanism, located above the positioning mechanism, is used to apply a downward restraining force to the sealing cap A during inflation to prevent it from popping out. The inflation mechanism is used to fill the air spring body K with gas, thereby increasing the internal air pressure and pushing the sealing cover A upward to achieve disassembly.

[0021] In this specific embodiment, the positioning mechanism includes a positioning plate 1 and a support frame 2; The positioning plate 1 is provided with a positioning cavity 12 with a side opening 11 and extending vertically, which is used to accommodate and radially position the air spring body K; The support frame 2 is fixedly installed below the positioning cavity 12. The support frame 2 has a vertically penetrating chamber 21 that communicates with the positioning cavity 12. The side of the chamber 21 is provided with an opening 22 that corresponds to the position of the side opening 11 of the positioning plate 1. The chamber 21 is provided with a support wall 23 that protrudes inward to support the relevant parts of the air spring body K. A stop 3 is hinged to the side opening 11 of the positioning plate 1. The stop 3 can be rotated to close or open the side opening 11. The air spring body K is inserted through the side opening 11. The relevant parts of the air spring body K are supported by the support bracket 2. Then, the stop block 3 is rotated to close the side opening 11, thus completing the radial constraint and axial limit of the air spring body K. After assembly, the part of the air spring body K with the sealing cover A is located above the positioning plate 1, so that the sealing cover A is in the position to be pressed and ejected.

[0022] The aforementioned positioning mechanism has a simple structure and convenient positioning operation. The side insertion of the air spring is more labor-saving and faster than vertical insertion from above, making it particularly suitable for workpieces with a certain weight. The positioning cavity 12 provides radial constraint, the support wall 23 provides axial support, and the stop block 3 provides lateral locking, which together achieve reliable fixation of the air spring body K in multiple directions, preventing it from moving or shaking during the disassembly of the sealing cover A, thus achieving reliable positioning. In addition, the design allows part of the sealing cover A to be completely exposed above the positioning plate 1, providing an unobstructed workstation for pressing and ejection operations.

[0023] In this specific embodiment, the support bracket 2 is detachably fixedly installed on the lower end face of the positioning plate 1. This facilitates the replacement of support brackets 2 of different specifications to adapt to air springs of different models or sizes, enhances the versatility of the tooling, and makes it more flexible in use. In addition, if the support bracket 2 is worn or damaged, it can be replaced or repaired separately, reducing maintenance costs and time.

[0024] In this specific embodiment, the first end of the stop block 3 is rotatably mounted on one end of the side opening 11, and a locking seat 111 is provided at the other end of the side opening 11. The second end of the stop block 3 is provided with a locking part 31, and a locking member 4 that cooperates with the locking part 31 is provided on the locking seat 111. When the stop block 3 rotates to the position of closing the side opening 11, the locking member 4 engages with the locking part 31 of the stop block 3, thereby reliably locking the stop block 3. The above structural design can effectively prevent the stop block 3 from accidentally opening due to vibration or pressure, ensuring operational safety; the opening, closing, and locking actions are clear and easy for operators to understand and execute.

[0025] In this specific embodiment, the first end of the stop block 3 is rotatably mounted on one end of the side opening 11 via a rotating shaft 30. The structure is simple and the rotatable connection is reliable.

[0026] In this specific embodiment, the locking part 31 is a locking hole, the locking element 4 is a positioning pin, and the locking seat 111 is provided with a pin hole (not shown in the figure) for the positioning pin to pass through. When the stop block 3 rotates to the closed position, the locking hole and the pin hole are aligned, and the positioning pin is inserted to achieve locking. The pin and the hole are standard mechanical components, which are easy to process and obtain. After the pin is locked, there is almost no play in the connection part, which ensures the rigidity of the lock, and the operator can intuitively see whether the positioning pin is inserted to confirm the locking state.

[0027] In this specific embodiment, the pressing mechanism includes a pressing cylinder 5 and a pressing head 50. The pressing head 50 is connected to the piston rod of the pressing cylinder 5, and the pressing cylinder 5 drives the pressing head 50 to move up and down to press or release the sealing cover A. The above-mentioned pressing mechanism has a simple structure, uses a cylinder drive, realizes the automation of the pressing action, and provides stable and adjustable pressure, which is more accurate and less labor-intensive than manual pressing.

[0028] In this specific embodiment, the pressure head 50 has an insertion cavity 501 with a lower opening. The insertion cavity 501 can be used to accommodate and accommodate the upward-protruding connecting portion A2 on the top of the sealing cap body A1. This design ensures that the end face of the pressure head 50 can be pressed flat against the main body plane of the sealing cap A, avoiding unstable pressing or damage to parts due to structural interference.

[0029] In this specific embodiment, a safety limiting sleeve 6 can also be movably mounted on the positioning mechanism. The safety limiting sleeve 6 can be driven to move downwards and press against the top of the air spring body K. The interior of the safety limiting sleeve 6 is hollow. When it is pressed into place, it can accommodate the entire sealing cover A within its internal space, thereby limiting the movement trajectory of the sealing cover A when it is ejected, preventing the sealing cover A from flying out and injuring people. By restricting the ejection of the sealing cover A within a closed space through the safety limiting sleeve 6, the risk of the sealing cover A flying out at high speed and injuring people or damaging equipment is completely eliminated, greatly improving operational safety.

[0030] In this specific embodiment, a drive plate 70 is movably mounted on the positioning plate 1 via a cylinder 7, and the safety limit sleeve 6 is detachably connected to the drive plate 70 via a quick-release structure 71. The cylinder 7 drives the safety limit sleeve 6 to stably and forcefully press it against the top of the workpiece, forming a sealed space. The detachable structure allows for quick replacement of safety limit sleeves 6 with different inner diameters for different sizes of sealing caps A, enhancing the adaptability and maintenance convenience of the equipment.

[0031] In this specific embodiment, the pressure head 50 is coaxially mounted within the safety limiting sleeve 6, allowing it to move vertically. The safety limiting sleeve 6 has a guide channel 61 inside, which guides the vertical movement of the pressure head 50. The guide channel 61 ensures that the pressure head 50 remains vertically aligned with the sealing cover A during its vertical movement, preventing uneven loading and ensuring a uniform distribution of clamping force. Simultaneously, the pressing and safety protection functions are integrated, making the tooling structure more compact and rational.

[0032] In this specific embodiment, the inflation mechanism is connected to the pressure-holding valve K1 of the air spring body K via a suitable inflation connector, injecting gas into the air spring body K. This method makes efficient use of the product's existing structure, inflating via the pressure-holding valve K1. The inflation process is direct and efficient, requiring no modification to the workpiece or the use of destructive methods. The operation is standardized and does not damage the workpiece. The inflation mechanism used is a conventional inflation mechanism employed in air spring manufacturing, and will not be described in detail here.

[0033] In this specific embodiment, the positioning plate 1 is supported and raised by a frame 10 to provide space for the positioning and installation of the air spring. The raised design provides the necessary space for the installation of the lower support frame 2, the placement of the workpiece, and observation.

[0034] The overall movements are as follows: (1) Rotate the stop block 3 to open the side opening 11 of the positioning plate 1; (2) Insert the air spring body K with the snap ring removed into the positioning cavity 12 through the side opening 11, so that its relevant parts are securely supported on the support wall 23 of the support frame 2. (3) Rotate the stop block 3 to the closed position and use the locking parts 4 such as the positioning pin to reliably lock it, thus completing the radial constraint and axial limit of the air spring. At this time, the part of the air spring with the sealing cover A is located above the positioning plate 1 and is in the position to be disassembled. (4) Start the press cylinder 5, drive the press head 50 to move downward and press it against the upper surface of the sealing cover A, and manually remove the snap ring; (5) Operate the corresponding cylinder 7 to drive the safety limit sleeve 6 to move downward until it presses against the top of the air spring body K, ensuring that the sealing cover A is located inside the safety limit sleeve 6. (6) Connect the inflation connector of the inflation mechanism to the pressure holding valve K1 of the air spring body K, slowly open the inflation valve, and start to fill the air spring with compressed air. (7) Closely monitor the pressure gauge connected to the inflation mechanism, observe the air pressure gradually rise, and listen carefully to the sound from the safety limit sleeve 6 in the direction of the pressure gauge. (8) When the internal air pressure rises to a level sufficient to overcome the friction of the sealing ring and the residual constraint force (this pressure value varies depending on the product model and wear condition, and is usually lower than the normal working pressure), a distinct "bang" or "poof" sound will be heard, and the pressure gauge pointer may drop slightly and rapidly. This indicates that the sealing cover A has been pushed upward by the internal air pressure. (9) After the sealing cover A is successfully pushed out, close the inflation valve, operate the press cylinder 5 to make the pressure head 50 rise and leave, and at the same time operate the cylinder 7 to drive the safety limit sleeve 6 to rise.

[0035] During the above-mentioned process, the downward constraint force applied by the pressing mechanism and the upward ejection force generated by inflation interact with each other, which helps to control the process of detaching the sealing cap A.

Claims

1. A tooling for disassembling an air spring sealing cover, characterized in that, include: Positioning mechanism, used to position and fix the air spring body; A pressing mechanism, located above the positioning mechanism, is used to apply a downward restraining force to the sealing cap during inflation to prevent it from popping out. An inflation mechanism is used to inflate the air spring body with gas, thereby increasing the internal air pressure and pushing the sealing cover upward to achieve disassembly.

2. The tooling for disassembling an air spring sealing cover as described in claim 1, characterized in that... The positioning mechanism includes a positioning plate and a support frame; The positioning plate is provided with a positioning cavity with a side opening and extending vertically, which is used to accommodate and radially position the air spring body. The support frame is fixedly installed below the positioning cavity. The support frame has a vertically penetrating chamber that communicates with the positioning cavity. The side of the chamber has an opening corresponding to the side opening of the positioning plate. The chamber has an inwardly protruding support wall for supporting the relevant parts of the air spring body. A stop block is hinged to the side opening of the positioning plate, and the stop block can be rotated to close or open the side opening. The air spring body is inserted through the side opening, and the relevant parts of the air spring body are supported by the support bracket. Then, the stop block is rotated to close the side opening, thus completing the radial constraint and axial limit of the air spring body. After assembly, the part of the air spring body with the sealing cover is located above the positioning plate, so that the sealing cover is in the position to be pressed and ejected.

3. The tooling for disassembling an air spring sealing cover as described in claim 2, characterized in that... The support bracket is detachably and fixedly installed on the lower end surface of the positioning plate.

4. The tooling for disassembling an air spring sealing cover as described in claim 2, characterized in that... The first end of the stop block is rotatably mounted on one end of the side opening, and a locking seat is provided at the other end of the side opening. The second end of the stop block is provided with a locking part, and the locking seat is provided with a locking member that cooperates with the locking part. When the stop block is rotated to the position that closes the side opening, the stop block is reliably locked by operating the locking member to engage with the locking part of the stop block.

5. The tooling for disassembling an air spring sealing cover as described in claim 4, characterized in that... The locking part is a locking hole, the locking element is a positioning pin, and the locking seat is provided with a pin hole for the positioning pin to pass through. When the stop block is rotated to the closed position, the locking hole and the pin hole are aligned, and the positioning pin is inserted to achieve locking.

6. A tooling for disassembling an air spring sealing cover as described in claim 1 or 2, characterized in that... The pressing mechanism includes a pressing cylinder and a pressing head. The pressing head is connected to the piston rod of the pressing cylinder. The pressing cylinder drives the pressing head to move up and down to press or release the sealing cover.

7. The tooling for disassembling an air spring sealing cover as described in claim 6, characterized in that... The pressure head has an internal insertion cavity with a lower opening, which can be used to accommodate and accommodate the upward-protruding connecting portion of the top of the sealing cap body.

8. The tooling for disassembling an air spring sealing cover as described in claim 6, characterized in that... The positioning mechanism may also be equipped with a safety limiting sleeve that can be moved up and down. The safety limiting sleeve can be driven to move downward and press against the top of the air spring body. The interior of the safety limiting sleeve is hollow. When it is pressed down into place, it can accommodate the entire sealing cover in its internal space, thereby limiting the movement trajectory of the sealing cover when it is pushed out and preventing the sealing cover from flying out and injuring people.

9. The tooling for disassembling an air spring sealing cover as described in claim 8, characterized in that... A drive plate is mounted on the positioning plate and can move up and down via a cylinder. The safety limit sleeve is detachably connected to the drive plate via a quick-release structure.

10. The tooling for disassembling an air spring sealing cover as described in claim 8, characterized in that... The pressure head is coaxially arranged inside the safety limiting sleeve, which can move up and down; the inside of the safety limiting sleeve is provided with a guide channel for guiding the up and down movement of the pressure head.

Images