A corrosion-resistant piston self-adapting machining centering device

Abstract

This invention relates to the field of cylinder technology and discloses a corrosion-resistant piston adaptive machining centering device, including a cylinder and a centering component. A piston plate is slidably installed inside the cylinder, and a piston rod is fixedly installed on the right side of the piston plate. A piston ring is provided on the circumferential surface of the piston plate. The centering component includes a support frame, a support groove, a centering frame, a centering hole, a centering spring, a rubber ring, a limiting groove, a mounting plate, an elastic telescopic plate, and a connecting rod. The support frame is fixedly installed on the left side of the piston plate, and the centering frame is slidably installed on the rear side of the support frame. The support groove is opened in the inner wall of the centering frame. The piston rod is limited to the right by the free end of the elastic telescopic plate and cannot move further to the right. This prevents the piston rod from moving excessively to the right and extending beyond its limit, thereby avoiding piston ring displacement caused by excessive rightward movement of the piston rod.

Description

Technical Field

[0001] This invention relates to the field of cylinder technology, and more particularly to a corrosion-resistant piston adaptive machining centering device. Background Technology

[0002] The compressed gas is alternately introduced into the rodless chamber and rod chamber of the cylinder by controlling the solenoid valve, so that a pressure difference is formed on both sides of the piston. The pressure difference pushes the piston to slide back and forth along the cylinder, which in turn drives the piston rod connected to the piston to extend and retract, providing pushing and pulling power for the external load; the gas in the other chamber is discharged at the same time, completing one cycle.

[0003] Patent CN215521457U relates to a piston adaptive centering device, belonging to the field of cylinder technology. It includes a cylinder body with an anti-detachment structure at its upper end. A piston body is installed inside the cylinder body, comprising a piston base plate and a piston rod. The piston base plate is fixed to the upper end of the piston rod. An elastic device is provided on the outer side of the piston base plate, with a spring pressure plate on its side and a piston sealing ring on its side. The piston sealing ring is a floating structure relative to the piston base plate. A movable hole is provided at the lower end of the cylinder body. This patent solves the problem of piston-cylinder misalignment caused by current machining and assembly errors, leading to unilateral air leakage or uneven friction causing tipping. It also addresses the issue of prolonged friction between the piston and cylinder causing wear and reducing cylinder lifespan.

[0004] The aforementioned patent addresses the issue of piston-cylinder misalignment caused by current machining and assembly errors, which can lead to unilateral air leakage or uneven friction causing rollover. However, during cylinder use, when the piston rod extends beyond its limit, the increased cantilever length leads to greater bending deformation, which can cause the piston rings to deviate from the cylinder axis, resulting in piston ring offset. Furthermore, under high-frequency reciprocating or heavy-load conditions, the unsupported piston rod is prone to deformation and breakage, thus shortening the cylinder's lifespan. Additionally, dragging the cylinder's air supply pipe can cause it to break and leak, resulting in high-pressure gas injection that can cause injury. Therefore, a corrosion-resistant piston adaptive machining centering device needs to be designed to solve these problems. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a corrosion-resistant piston adaptive machining centering device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A corrosion-resistant piston adaptive machining centering device includes a cylinder and a centering assembly. A piston plate is slidably mounted inside the cylinder, and a piston rod is fixedly mounted on the right side of the piston plate. A piston ring is provided on the circumferential surface of the piston plate. The centering assembly includes a support frame, a support groove, a centering frame, a centering hole, a centering spring, a rubber ring, a limiting groove, a mounting plate, an elastic telescopic plate, and a connecting rod. The support frame is fixedly mounted on the left side of the piston plate, and the centering frame is slidably mounted on the rear side of the support frame. The support groove is formed in the inner wall of the centering frame, and the centering hole is formed in the left side of the centering frame. The centering spring is disposed between the piston plate and the centering frame. The rubber ring is fixedly installed on the right side of the centering frame. The rubber ring can increase the sealing between the centering frame and the piston plate. The limiting groove is opened on the circumferential surface of the piston rod. The mounting plate is fixedly installed at the bottom of the cylinder. The elastic telescopic plate is fixedly installed on the top of the mounting plate. The connecting rod is disposed on the circumferential surface of the piston rod. The elastic telescopic plate is used to limit the piston rod. The centering frame is used to center the piston ring on the surface of the piston plate. The piston rod is limited by the free end of the elastic telescopic plate and cannot move further to the right.

[0008] As a preferred embodiment of the present invention, the piston rod slides through the right side of the cylinder, the piston ring is used to improve the sealing between the piston plate and the cylinder, the centering bracket abuts against the inner wall of the piston ring, and the centering bracket moving to the right will continuously support the piston ring and thus prevent the piston ring from shifting.

[0009] As a preferred technical solution of the present invention, the top of the elastic telescopic plate is set as an inclined surface. By setting the top of the elastic telescopic plate as an inclined surface, the frictional force when the piston rod contacts the elastic telescopic plate can be reduced. The free end of the elastic telescopic plate abuts against the connecting rod. The right side of the inner wall of the limiting groove is set as an inclined surface. When the centering frame moves to the right, it will squeeze the rubber ring. The rubber ring will deform under the compression of the centering frame.

[0010] As a preferred embodiment of the present invention, it further includes a support assembly and a protection assembly. The support assembly is used to support the piston rod, and the protection assembly is used to protect the cylinder. The support assembly includes an elastic telescopic block, an annular plate, a linkage plate, a support ring, and a buffer plate. The support ring moves upward to contact the piston rod and support it. The elastic telescopic block is fixedly installed on the top of the mounting plate. The annular plate is fixedly installed on the circumferential surface of the elastic telescopic block. The linkage plate is fixedly installed on the free end of the elastic telescopic plate. The support ring is fixedly installed on the top of the free end of the elastic telescopic block. The buffer plate is fixedly installed on the circumferential surface of the piston rod.

[0011] As a preferred embodiment of the present invention, the support assembly further includes an elastic telescopic rod and a buffer hole. The elastic telescopic rod is fixedly installed on the right side of the cylinder, and the buffer hole is opened on the left side of the elastic telescopic rod. A sealing ring is provided between the free end and the fixed end of the elastic telescopic rod, which can increase the sealing between the free end and the fixed end of the elastic telescopic rod.

[0012] As a preferred embodiment of the present invention, the top of the support ring is set as an inclined surface, the annular plate is in contact with the linkage plate, the free end of the elastic telescopic rod is in contact with the buffer plate, and the free end of the elastic telescopic rod slowly moves to the left so that the buffer plate and the piston rod slowly move to the left to reset.

[0013] As a preferred embodiment of the present invention, the protective assembly includes a cylindrical rod, an air inlet, a hollow block, a protective block, a shielding block, a telescopic spring rod, and a pressing frame. The pressing frame moves to the left to cooperate with the protective block and the shielding block to press and fix the air inlet. The cylindrical rod is fixedly installed on the left side of the free end of the elastic telescopic rod. The air inlet is opened at the top of the cylinder. The hollow block is fixedly installed at the top of the cylinder. The protective block is fixedly installed at the top of the cylinder. The telescopic spring rod is fixedly installed at the top of the cylinder. The pressing frame is fixedly installed at the output end of the telescopic spring rod.

[0014] In a preferred embodiment of the present invention, the cylindrical rod contacts the pressing frame, the left side of the pressing frame is configured as an arc surface, and both the protective block and the guard block are configured as arc surfaces. When the pressing frame moves to the left, it will impact the hollow block and produce vibration. The present invention has the following beneficial effects:

[0015] 1. This invention provides continuous support to the piston rings by moving the centering bracket to the right, thus preventing piston ring misalignment. The centering bracket and piston rings form a rigid support, directly limiting the radial movement of the rings. This prevents piston ring misalignment caused by cylinder wall clearance or piston plate movement fluctuations, ensuring the rings are aligned with the cylinder. The deformation of the rubber ring enhances the sealing between the piston rings and piston plates. When the piston rod is fully reset, the rubber ring fills the gap between the piston rings and piston plates, blocking gas leakage between the two chambers. This ensures a stable initial sealing state of the cylinder and prevents power loss due to pressure leakage after reset. The upward movement of the free end of the elastic telescopic plate during reset contacts the inner wall of the limiting groove and limits the piston rod. The piston rod is limited by the free end of the elastic telescopic plate and cannot move further to the right, preventing excessive rightward extension and thus avoiding piston ring misalignment caused by excessive rightward movement of the piston rod.

[0016] 2. In this invention, the support ring moves upward to contact and support the piston rod. At the maximum extension limit, the piston rod has the longest cantilever. The contact support of the support ring can reduce the bending deformation of the piston rod and ensure the output position accuracy of the cylinder at the maximum extension limit.

[0017] 3. In this invention, the free end of the telescopic rod slowly moves to the left, causing the buffer plate and piston rod to slowly move to the left and reset. The slow reset can reduce the vibration during cylinder operation and reset, thereby reducing impact damage to the cylinder, protecting the corrosion-resistant coating and extending the cylinder life.

[0018] 4. This invention uses a pressing frame that moves to the left to press and fix the air supply pipe in conjunction with a protective block and a guard block. When the pressing frame moves to the right to reset, it will disengage from the air supply pipe and release the restriction on the air supply pipe. When the pressing frame moves to the left to reset, it presses and fixes the air supply pipe to prevent the hose from being dragged when the cylinder resets. When moving to the right, it releases the restriction on the air supply pipe and will not hinder the hose from deforming naturally with the cylinder stroke. This avoids hose wear and breakage caused by dragging from the source and prevents the safety hazard of hose breakage and spraying.

[0019] 5. In this invention, when the pressing frame moves to the left, it will hit the hollow block and generate vibration. The vibration of the pressing frame will shake off the waste debris adhering to the surface, thereby avoiding the waste debris from rubbing or squeezing on the surface of the gas pipe, further reducing the risk of scratches or damage to the pipe wall, and further extending the service life of the gas pipe. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure proposed in this invention;

[0021] Figure 2 This is a schematic diagram of a half-section structure of the cylinder proposed in this invention;

[0022] Figure 3 This is a schematic diagram of a half-section of the centering frame structure proposed in this invention;

[0023] Figure 4 This is a schematic diagram of a half-section structure of the cylinder proposed in this invention;

[0024] Figure 5 This is a schematic diagram of the positional structure of the piston rod and buffer plate proposed in this invention;

[0025] Figure 6 This is a schematic diagram of the positional structure of the elastic telescopic plate and the linkage plate proposed in this invention;

[0026] Figure 7 This is a schematic diagram of a half-section of the elastic telescopic rod proposed in this invention.

[0027] In the diagram: 1. Cylinder; 2. Piston rod; 3. Piston plate; 4. Support frame; 5. Support groove; 6. Centering frame; 7. Centering hole; 8. Centering spring; 9. Rubber ring; 10. Limiting groove; 11. Mounting plate; 12. Elastic telescopic plate; 13. Connecting rod; 141. Elastic telescopic block; 142. Ring plate; 143. Linkage plate; 144. Support ring; 145. Buffer plate; 146. Elastic telescopic rod; 147. Buffer hole; 151. Cylindrical rod; 152. Air inlet; 153. Hollow block; 154. Protective block; 155. Protective block; 156. Telescopic spring rod; 157. Pressing frame. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] Reference Figure 1-7 One embodiment of the present invention is: a corrosion-resistant piston adaptive machining centering device, including a cylinder 1 and a centering component. A piston plate 3 is slidably installed inside the cylinder 1, and a piston rod 2 is fixedly installed on the right side of the piston plate 3. A piston ring is provided on the circumferential surface of the piston plate 3. The centering component includes a support frame 4, a support groove 5, a centering frame 6, a centering hole 7, a centering spring 8, a rubber ring 9, a limiting groove 10, a mounting plate 11, an elastic telescopic plate 12, and a connecting rod 13. The support frame 4 is fixedly installed on the left side of the piston plate 3, and the centering frame 6 is slidably installed on the rear side of the support frame 4. The support groove 5 is opened in the inner wall of the centering frame 6, the centering hole 7 is opened in the left side of the centering frame 6, and the centering spring 8 is disposed between the piston plate 3 and the piston rod 2. Between the centering frame 6, a rubber ring 9 is fixedly installed on the right side of the centering frame 6. The rubber ring 9 can increase the sealing between the centering frame 6 and the piston plate 3. The limiting groove 10 is opened on the circumferential surface of the piston rod 2. The mounting plate 11 is fixedly installed at the bottom of the cylinder 1. The elastic telescopic plate 12 is fixedly installed on the top of the mounting plate 11. The connecting rod 13 is set on the circumferential surface of the piston rod 2. The elastic telescopic plate 12 is used to limit the piston rod 2. The centering frame 6 is used to center the piston ring on the surface of the piston plate 3. The piston rod 2 is limited by the free end of the elastic telescopic plate 12 and cannot continue to move to the right. This can prevent the piston rod 2 from moving too far to the right and extending beyond the limit, thereby avoiding the piston ring offset caused by the piston rod 2 moving too far to the right.

[0030] The piston rod 2 slides through the right side of the cylinder 1. The piston ring is used to improve the sealing between the piston plate 3 and the cylinder 1. The centering bracket 6 abuts against the inner wall of the piston ring. The centering bracket 6 moves to the right to provide continuous support for the piston ring and thus prevent the piston ring from shifting. The centering bracket 6 and the piston ring form a rigid support, which directly restricts the radial movement of the ring, thereby preventing the piston ring from shifting due to the gap in the inner wall of the cylinder 1 or the movement fluctuation of the piston plate 3, and ensuring that the ring and the cylinder are aligned in the center.

[0031] The top of the elastic telescopic plate 12 is set as an inclined surface. By setting the top of the elastic telescopic plate 12 as an inclined surface, the frictional force when the piston rod 2 contacts the elastic telescopic plate 12 can be reduced. The free end of the elastic telescopic plate 12 abuts against the connecting rod 13. The right side of the inner wall of the limiting groove 10 is set as an inclined surface. When the centering frame 6 moves to the right, it will squeeze the rubber ring 9. The rubber ring 9 will deform under the compression of the centering frame 6. When the piston rod 2 is fully reset, the deformation of the rubber ring 9 fills the gap between the piston ring and the piston plate 3, blocking the gas leakage between the two chambers. This can ensure the initial sealing state of the cylinder 1 is stable and avoid the power loss caused by pressure leakage after reset.

[0032] During operation: When cylinder 1 is in operation, compressed gas is controlled by the solenoid valve to enter the rod chamber of cylinder 1. The compressed gas entering the rod chamber of cylinder 1 pushes the piston plate 3 to move to the left. The piston plate 3 moving to the left will drive the piston rod 2 to move to the left. At the same time, the piston plate 3 moving to the left will drive the support frame 4 to move to the left. The support frame 4 moving to the left will drive the centering frame 6 to move to the left. The centering frame 6 moving to the left will contact the left inner wall of cylinder 1 and squeeze the left inner wall of cylinder 1. The centering frame 6 is squeezed by the reaction force of cylinder 1 and moves to the right. The centering frame 6 moving to the right will squeeze the centering spring 8. The centering spring 8 is deformed and stores force due to the compression of the centering frame 6. At the same time, the centering frame 6 moving to the right will continuously support the piston ring and thus prevent the piston ring from shifting.

[0033] When the centering frame 6 moves to the right, it compresses the rubber ring 9. The rubber ring 9 deforms under the compression of the centering frame 6, which in turn enhances the sealing between the piston ring and the piston plate 3. When the cylinder 1 is in operation, the compressed gas is controlled by the solenoid valve to enter the rodless chamber of the cylinder 1. The compressed gas entering the rodless chamber of the cylinder 1 will compress the piston plate 3 to move to the right. The piston plate 3 moving to the right will drive the piston rod 2 to move to the right. The piston rod 2 moving to the right will align the free end of the elastic telescopic plate 12 with the limiting groove 10. After the limiting groove 10 is aligned with the free end of the elastic telescopic plate 12, the free end of the elastic telescopic plate 12 moves upward and resets under its own elastic force. The upward reset of the free end of the elastic telescopic plate 12 will contact the inner wall of the limiting groove 10 and limit the piston rod 2. The piston rod 2 is limited by the free end of the elastic telescopic plate 12 and cannot move to the right any further.

[0034] Reference Figure 1-7Based on the above embodiments, another embodiment of the present invention further includes a support assembly and a protection assembly. The support assembly is used to support the piston rod 2, and the protection assembly is used to protect the cylinder 1. The support assembly includes an elastic telescopic block 141, an annular plate 142, a linkage plate 143, a support ring 144, and a buffer plate 145. The elastic telescopic block 141 is fixedly installed on the top of the mounting plate 11, the annular plate 142 is fixedly installed on the circumferential surface of the elastic telescopic block 141, the linkage plate 143 is fixedly installed on the free end of the elastic telescopic plate 141, the support ring 144 is fixedly installed on the top of the free end of the elastic telescopic block 141, and the buffer plate 145 is fixedly installed on the circumferential surface of the piston rod 2. When the piston rod 2 is at its maximum extension limit, the cantilever of the piston rod 2 is at its longest. The contact support of the support ring 144 can reduce the bending deformation of the piston rod 2 and ensure the output position accuracy of the cylinder 1 at its maximum extension limit.

[0035] The support assembly also includes an elastic telescopic rod 146 and a buffer hole 147. The elastic telescopic rod 146 is fixedly installed on the right side of the cylinder 1, and the buffer hole 147 is opened on the left side of the elastic telescopic rod 146. A sealing ring is provided between the free end and the fixed end of the elastic telescopic rod 146, which can increase the sealing between the free end and the fixed end of the elastic telescopic rod 146.

[0036] The top of the support ring 144 is set as an inclined surface, the annular plate 142 contacts the linkage plate 143, the free end of the elastic telescopic rod 146 abuts against the buffer plate 145, and the free end of the elastic telescopic rod 146 slowly moves to the left, causing the buffer plate 145 and the piston rod 2 to slowly move to the left to reset. The slow reset can reduce the vibration when the cylinder 1 is running and resetting, thereby reducing the impact damage to the cylinder 1, protecting the corrosion-resistant coating and extending the life of the cylinder 1.

[0037] The protective assembly includes a cylindrical rod 151, an air inlet 152, a hollow block 153, a protective block 154, a protective block 155, a telescopic spring rod 156, and a pressing frame 157. The cylindrical rod 151 is fixedly installed on the left side of the free end of the elastic telescopic rod 146. The air inlet 152 is opened on the top of the cylinder 1. The hollow block 153 is fixedly installed on the top of the cylinder 1. The protective block 154 is fixedly installed on the top of the cylinder 1. The protective block 155 is fixedly installed on the top of the cylinder 1. The telescopic spring rod 156 is fixedly installed on the top of the cylinder 1. The pressing frame 157 is fixedly installed on the output end of the telescopic spring rod 156. When the pressing frame 157 moves to the left to reset, it squeezes and fixes the air inlet pipe to prevent the hose from being dragged when the cylinder 1 resets. When moving to the right, it releases the restriction on the air inlet pipe and does not hinder the hose from deforming naturally with the stroke of the cylinder 1. This avoids hose wear and breakage caused by dragging from the source and prevents the safety hazard of hose breakage and spraying.

[0038] The cylindrical rod 151 contacts the pressing frame 157. The left side of the pressing frame 157 is set as an arc surface. The protective block 154 and the protective block 155 are both set as arc surfaces. When the pressing frame 157 moves to the left, it will hit the hollow block 153 and generate vibration. The vibration of the pressing frame 157 will shake off the waste debris adhering to the surface, thereby avoiding the waste debris from rubbing or being squeezed on the surface of the gas pipe.

[0039] During operation, the upward movement of the free end of the elastic telescopic plate 12 will cause the linkage plate 143 to move upward. The upward movement of the linkage plate 143 will contact the annular plate 142 and squeeze the annular plate 142. The annular plate 142 will move upward under the squeezing of the linkage plate 143. The upward movement of the annular plate 142 will cause the free end of the elastic telescopic block 141 to move upward. The upward movement of the free end of the elastic telescopic block 141 will cause the support ring 144 to move upward. The upward movement of the support ring 144 will contact the piston rod 2 and support the piston rod 2. When the piston rod 2 moves to the left and resets, it will squeeze the free end of the elastic telescopic plate 12.

[0040] The free end of the elastic telescopic plate 12 moves downward under the pressure of the piston rod 2. The downward movement of the free end of the elastic telescopic plate 12 will drive the linkage plate 143 to move downward. The downward movement of the linkage plate 143 will disengage from the contact with the annular plate 142. After the annular plate 142 disengages from the contact with the linkage plate 143, the elastic telescopic block 141 drives the support ring 144 to move downward and reset under its own elastic force. At the same time, the piston rod 2 moves to the left and resets, which will drive the buffer plate 145 to move to the left and reset. The buffer plate 145 moves to the left and resets, which will contact the free end of the elastic telescopic rod 146 and squeeze the free end of the elastic telescopic rod 146. The free end of the elastic telescopic rod 146 moves to the left under the pressure of the buffer plate 145.

[0041] When the free end of the elastic telescopic rod 146 moves to the left, it compresses the gas inside the elastic telescopic rod 146. The gas inside the elastic telescopic rod 146 is compressed by the free end of the elastic telescopic rod 146 and slowly flows out through the buffer hole 147. The slow flow of the gas inside the elastic telescopic rod 146 through the buffer hole 147 causes the free end of the elastic telescopic rod 146 to slowly move to the left. The slow movement of the free end of the elastic telescopic rod 146 to the left causes the buffer plate 145 and the piston rod 2 to slowly move to the left and reset.

[0042] When the free end of the elastic telescopic rod 146 moves to the left to reset, it will cause the cylindrical rod 151 to move to the left. When the cylindrical rod 151 moves to the left, it will contact the pressing frame 157 and squeeze the pressing frame 157. The pressing frame 157 moves to the left under the squeezing of the cylindrical rod 151. The pressing frame 157 moves to the left and squeezes the free end of the telescopic spring rod 156. The free end of the telescopic spring rod 156 retracts and stores force under the squeezing of the pressing frame 157.

[0043] At the same time, the pressing frame 157 moves to the left to cooperate with the protective block 154 and the protective block 155 to squeeze and fix the gas pipe. When the free end of the elastic telescopic rod 146 moves to the right to reset, it will drive the cylindrical rod 151 to move to the right. The cylindrical rod 151 will disengage from the pressing frame 157 when it moves to the right.

[0044] After the pressing frame 157 disengages from the cylindrical rod 151, the pressing frame 157 moves to the right and resets under the elastic force of the telescopic spring rod 156. The pressing frame 157 moves to the right and resets, disengaging from the gas pipe and releasing the restriction on the gas pipe. When the pressing frame 157 moves to the left, it will hit the hollow block 153 and cause vibration.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A corrosion-resistant piston adaptive machining centering device, comprising a cylinder (1), characterized in that, It also includes a centering component, a support component and a protection component. A piston plate (3) is slidably installed inside the cylinder (1). A piston rod (2) is fixedly installed on the right side of the piston plate (3). A piston ring is provided on the circumferential surface of the piston plate (3). The centering component includes a support frame (4), a support groove (5), a centering frame (6), a centering hole (7), a centering spring (8), a rubber ring (9), a limiting groove (10), a mounting plate (11), an elastic telescopic plate (12), and a connecting rod (13). The support frame (4) is fixedly installed on the left side of the piston plate (3), and the centering frame (6) is slidably installed on the rear side of the support frame (4). The support groove (5) is opened on the inner wall of the centering frame (6), and the centering hole (7) is opened on the left side of the centering frame (6). The centering spring (8) is located on the left side of the centering frame (6). Between the piston plate (3) and the centering frame (6), the rubber ring (9) is fixedly installed on the right side of the centering frame (6), the limiting groove (10) is opened on the circumferential surface of the piston rod (2), the mounting plate (11) is fixedly installed at the bottom of the cylinder (1), the elastic telescopic plate (12) is fixedly installed on the top of the mounting plate (11), the connecting rod (13) is set on the circumferential surface of the piston rod (2), the elastic telescopic plate (12) is used to limit the piston rod (2), and the centering frame (6) is used to center the piston ring on the surface of the piston plate (3); The support assembly is used to support the piston rod (2), and the protection assembly is used to protect the cylinder (1); The support assembly includes an elastic telescopic block (141), an annular plate (142), a linkage plate (143), a support ring (144), and a buffer plate (145). The elastic telescopic block (141) is fixedly installed on the top of the mounting plate (11), the annular plate (142) is fixedly installed on the circumferential surface of the elastic telescopic block (141), the linkage plate (143) is fixedly installed on the free end of the elastic telescopic plate (12), the support ring (144) is fixedly installed on the top of the free end of the elastic telescopic block (141), and the buffer plate (145) is fixedly installed on the circumferential surface of the piston rod (2). The support assembly also includes an elastic telescopic rod (146) and a buffer hole (147). The elastic telescopic rod (146) is fixedly installed on the right side of the cylinder (1), and the buffer hole (147) is opened on the left side of the elastic telescopic rod (146). A sealing ring is provided between the free end and the fixed end of the elastic telescopic rod (146). The top of the support ring (144) is set as an inclined surface, the annular plate (142) is in contact with the linkage plate (143), and the free end of the elastic telescopic rod (146) is in contact with the buffer plate (145).

2. The corrosion-resistant piston adaptive machining centering device according to claim 1, characterized in that, The piston rod (2) slides through the right side of the cylinder (1), the piston ring is used to improve the sealing between the piston plate (3) and the cylinder (1), and the centering bracket (6) abuts against the inner wall of the piston ring.

3. The corrosion-resistant piston adaptive machining centering device according to claim 2, characterized in that, The top of the elastic telescopic plate (12) is set as an inclined surface, the free end of the elastic telescopic plate (12) abuts against the connecting rod (13), and the right side of the inner wall of the limiting groove (10) is set as an inclined surface.

4. The corrosion-resistant piston adaptive machining centering device according to claim 3, characterized in that, The protective assembly includes a cylindrical rod (151), an air inlet (152), a hollow block (153), a protective block (154), a protective block (155), a telescopic spring rod (156), and a pressing frame (157). The cylindrical rod (151) is fixedly installed on the left side of the free end of the elastic telescopic rod (146). The air inlet (152) is opened on the top of the cylinder (1). The hollow block (153) is fixedly installed on the top of the cylinder (1). The protective block (154) is fixedly installed on the top of the cylinder (1). The protective block (155) is fixedly installed on the top of the cylinder (1). The telescopic spring rod (156) is fixedly installed on the top of the cylinder (1). The pressing frame (157) is fixedly installed on the output end of the telescopic spring rod (156).

5. The corrosion-resistant piston adaptive machining centering device according to claim 4, characterized in that, The cylindrical rod (151) contacts the pressing frame (157), the left side of the pressing frame (157) is set as an arc surface, and both the protective block (154) and the protective block (155) are set as arc surfaces.

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