Air cylinder with built-in magnetic ring air buffering function

Abstract

The invention discloses an air cylinder with a built-in magnetic ring air buffering function, and relates to the technical field of air cylinders. The hydraulic cylinder comprises a cylinder barrel, four pull rods, a rear cylinder seat, a front cylinder seat and a piston rod, the cylinder barrel and the pull rods are fixedly assembled between the rear cylinder seat and the front cylinder seat, and the piston rod is assembled on the cylinder barrel and the front cylinder seat in a sliding mode. Electromagnetic buffer assemblies are arranged on the rear cylinder seat and the front cylinder seat; according to the invention, under the action of the adjusting assembly and the electromagnetic buffer assembly, the distance between the first electromagnetic solenoid coil and the piston rod and the distance between the second electromagnetic solenoid coil and the piston rod are adjusted, and meanwhile, the magnetic field directions of the first electromagnetic solenoid coil and the second electromagnetic solenoid coil are changed through the current directions of the first power supply and the second power supply; the piston rod can rapidly stop moving under the action of electromagnetic force opposite to the moving direction of the piston rod in the moving process, damage caused by impact between the piston rod and the rear cylinder base or the front cylinder base is avoided, the abrasion degree of the piston rod is reduced, and the service life of the air cylinder is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of cylinders, in particular to a cylinder with a built-in magnetic ring gas buffer function. Background Art

[0002] The cylinder refers to a cylindrical metal part that guides the piston to perform linear reciprocating motion in the cylinder. The air in the engine cylinder converts heat energy into mechanical energy through expansion; the gas in the compressor cylinder is compressed by the piston to increase the pressure; The buffer cylinder is a cylindrical metal part that guides the piston to perform linear reciprocating motion in it. As a type of cylinder, it is mainly composed of a cylinder body, a piston rod, a piston, a buffer plunger, a throttle valve, a one-way valve, an inlet and outlet hole, and an end cover. However, the buffer cylinder in the prior art still has some defects: 1. Most of the buffer cylinders in the prior art are not convenient for the moving piston rod to stop moving quickly, so that the piston rod is easy to hit the cylinder head, thereby causing damage to the piston rod, thereby affecting the service life of the cylinder; 2. At the same time, in the prior art, when assembling the cylinder, the assembly steps between the cylinder barrel and the cylinder head are complicated and involve many steps, which makes the assembly operation of the cylinder inconvenient.

[0003] In view of the above problems, the inventor proposes a cylinder with a built-in magnetic ring air buffer function to solve the above problems. Summary of the invention

[0004] In order to solve the problems in the prior art that the cylinder is inconvenient to control the piston rod in motion to stop moving quickly and the cylinder assembly operation is inconvenient; the purpose of the present invention is to provide a cylinder with a built-in magnetic ring air buffer function.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions: a cylinder with a built-in magnetic ring gas buffer function, the cylinder comprises a cylinder barrel, a tie rod, a rear cylinder seat, a front cylinder seat and a piston rod, four tie rods are provided, the cylinder barrel and the tie rod are fixedly assembled between the rear cylinder seat and the front cylinder seat, and the piston rod is slidably assembled on the cylinder barrel and the front cylinder seat; The rear cylinder seat and the front cylinder seat are provided with an electromagnetic buffer component, the rear cylinder seat and the front cylinder seat are provided with an adjustment component, and the rear cylinder seat and the front cylinder seat are provided with an assembly component for assembling a cylinder barrel and a pull rod.

[0006] Preferably, the electromagnetic buffer assembly comprises a first electromagnetic solenoid coil and a second electromagnetic solenoid coil; The first electromagnetic solenoid coil is arranged in the inner cavity of the rear cylinder seat, and the second electromagnetic solenoid coil is arranged in the inner cavity of the front cylinder seat; A No. 1 power supply is fixedly mounted on the upper end surface of the rear cylinder seat, and the No. 1 power supply is electrically connected to a No. 1 electromagnetic solenoid coil via a wire; A No. 2 power supply is fixedly mounted on the upper end surface of the front cylinder seat, and the No. 2 power supply is electrically connected to the No. 2 electromagnetic solenoid coil through a wire.

[0007] Preferably, the adjustment assembly includes two movable seats, one of which is arranged in the inner cavity of the rear cylinder seat, and the other of which is arranged in the inner cavity of the front cylinder seat, and two connecting rods are fixedly installed on one side of the two movable seats, wherein one end of two adjacent connecting rods is fixedly connected to the outer wall of the first electromagnetic solenoid coil, and another end of two adjacent connecting rods is fixedly connected to the outer wall of the second electromagnetic solenoid coil.

[0008] Preferably, one end of the rear cylinder seat and the front cylinder seat is provided with a No. 2 groove, and the inner walls of the two No. 2 grooves are rotatably mounted with screws, one of which passes through a moving seat and is rotatably connected to a moving seat by a thread.

[0009] Preferably, the assembly assembly comprises a rubber ring and a connecting sleeve; Two rubber rings are provided, and the end of the cylinder barrel is in active contact with the inner wall of the rubber ring, one of the rubber rings is fixedly mounted on the other end of the rear cylinder seat, and the other rubber ring is fixedly mounted on the other end of the front cylinder seat, and a No. 1 groove is provided around the rear cylinder seat and the front cylinder seat, and a locking screw is threadedly mounted on the inner wall of the No. 1 groove, and four threaded sleeves distributed in an annular array are fixedly mounted on both ends of the cylinder barrel, and one end of the locking screw is threadedly mounted on the inner wall of the threaded sleeve; There are eight connecting sleeves, wherein four adjacent connecting sleeves are distributed in a ring array and fixedly installed at one end of the rear cylinder seat, and another four adjacent connecting sleeves are distributed in a ring array and fixedly installed at one end of the front cylinder seat; The end of the pull rod is in active contact with the inner wall of the connecting sleeve.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, by assembling the components, the two ends of the cylinder barrel are respectively inserted into the rubber rings of the rear cylinder seat and the front cylinder seat, and the locking screw thread enters into the threaded sleeve, and the locking screw fixes the cylinder barrel between the rear cylinder seat and the front cylinder seat, thereby conveniently realizing the rapid assembly of the cylinder, thereby effectively improving the convenience of the cylinder assembly operation; 2. In the present invention, the distance between the No. 1 electromagnetic solenoid coil and the No. 2 electromagnetic solenoid coil and the piston rod is adjusted by the action of the adjustment component and the electromagnetic buffer component. At the same time, the direction of the magnetic field of the No. 1 electromagnetic solenoid coil and the No. 2 electromagnetic solenoid coil is changed by the current direction of the No. 1 power supply and the No. 2 power supply. During the movement of the piston rod, the piston rod will be affected by an electromagnetic force in the opposite direction of its movement and stop moving quickly, thereby avoiding damage caused by impact between the piston rod and the rear cylinder seat or the front cylinder seat, reducing the wear of the piston rod and increasing the service life of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 The front view of a cylinder with a built-in magnetic ring gas buffer function according to the present invention.

[0013] Figure 2 It is a schematic structural diagram of the cylinder barrel, rear cylinder seat and front cylinder seat of the present invention.

[0014] Figure 3 It is a schematic diagram of the separation structure of the cylinder barrel, the rear cylinder seat and the front cylinder seat of the present invention.

[0015] Figure 4 It is a structural schematic diagram of the assembly components, the rear cylinder seat and the front cylinder seat of the present invention.

[0016] Figure 5 It is a schematic diagram of the connection structure of the section of the rear cylinder seat and the front cylinder seat and the adjustment assembly of the present invention.

[0017] Figure 6 It is a schematic diagram of the structure of the regulating component and the first electromagnetic solenoid coil of the present invention.

[0018] In the figure: 1. cylinder barrel; 11. tie rod; 2. rear cylinder seat; 21. No. 1 air port; 3. front cylinder seat; 31. No. 2 air port; 32. sealing gasket; 4. piston rod; 41. magnet; 411. buffer seal ring; 42. buffer sleeve; 43. sliding bearing; 6. electromagnetic buffer assembly; 61. No. 1 electromagnetic solenoid coil; 62. No. 1 power supply; 63. No. 2 electromagnetic solenoid coil; 64. No. 2 power supply; 7. assembly assembly; 71. rubber ring; 72. No. 1 groove; 73. locking screw; 74. threaded sleeve; 75. hexagonal seat; 76. connecting sleeve; 8. adjustment assembly; 81. moving seat; 811. connecting rod; 82. guide block; 83. guide groove; 84. No. 2 groove; 85. lead screw; 86. rotating seat; 87. hexagonal groove. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] Example: Figure 1-6 As shown, the present invention provides a cylinder with a built-in magnetic ring air buffer function, the cylinder includes a cylinder barrel 1, a pull rod 11, a rear cylinder seat 2, a front cylinder seat 3 and a piston rod 4, the cylinder barrel 1 is equipped with a magnet 41, a buffer seal ring 411, a buffer sleeve 42 and a sliding bearing 43, the magnet 41 is used to provide a position signal to help an external controller detect the position and state of the piston rod 4, so as to realize functions such as position control, in-position stop, in-position start, and material detection, when the piston rod 4 moves in the reverse direction, the buffer seal ring 411 acts as a one-way valve, allowing compressed air to flow to the piston rod 4, pushing the piston rod 4 back, the buffer sleeve 42 reduces the impact force of the piston rod 4 at the end of the stroke, and protects the cylinder and mechanical equipment from damage, and the sliding bearing 43 has the function of reducing friction and wear, which can improve The movement efficiency and life of the piston rod 4 are prior art and will not be elaborated here. Four pull rods 11 are provided. The cylinder barrel 1 and the pull rod 11 are fixedly assembled between the rear cylinder seat 2 and the front cylinder seat 3. The piston rod 4 is slidably assembled on the cylinder barrel 1 and the front cylinder seat 3. One side of the rear cylinder seat 2 is equipped with a No. 1 gas port 21, and one side of the front cylinder seat 3 is equipped with a No. 2 gas port 31. By arranging the No. 1 gas port 21 and the No. 2 gas port 31, it is convenient to transport gas to or discharge gas from both ends of the inner cavity of the cylinder barrel 1. This is prior art and will not be elaborated here. A sealing gasket 32 ​​is fixedly installed at one end of the front cylinder seat 3. The piston rod 4 passes through the sealing gasket 32 ​​and is in active contact with the inner wall of the sealing gasket 32. By arranging the sealing gasket 32, the sealing gasket 32 ​​can improve the sealing between the piston rod 4 and the front cylinder seat 3 to prevent dust from entering the inner cavity of the cylinder barrel 1. An electromagnetic buffer assembly 6 is provided on the rear cylinder seat 2 and the front cylinder seat 3, and an adjustment assembly 8 is provided on the rear cylinder seat 2 and the front cylinder seat 3. By setting the electromagnetic buffer assembly 6 and the adjustment assembly 8, the electromagnetic buffer assembly 6 can generate a force opposite to the movement direction of the piston rod 4 according to the principle of magnetic field opposite charges attracting and like charges repelling, so as to achieve buffering of the piston rod 4, thereby preventing the piston rod 4 from hitting the inner cavity of the rear cylinder seat 2 or the front cylinder seat 3, reducing the degree of wear of the piston rod 4, and improving the service life of the cylinder. The adjustment assembly 8 can adjust the degree of electromagnetic buffering to achieve buffering of different distances of the piston rod 4. An assembly assembly 7 for assembling the cylinder barrel 1 and the pull rod 11 is provided on the rear cylinder seat 2 and the front cylinder seat 3. By setting the assembly assembly 7, the assembly assembly 7 can achieve assembly between the cylinder barrel 1 and the rear cylinder seat 2 and the front cylinder seat 3. The assembly is simple and convenient, thereby improving the assembly efficiency of the cylinder.

[0021] The electromagnetic buffer assembly 6 includes a first electromagnetic solenoid coil 61 and a second electromagnetic solenoid coil 63; The No. 1 electromagnetic solenoid coil 61 is arranged in the inner cavity of the rear cylinder seat 2, and the No. 2 electromagnetic solenoid coil 63 is arranged in the inner cavity of the front cylinder seat 3. The No. 1 power supply 62 is fixedly installed on the upper end surface of the rear cylinder seat 2, and the No. 1 power supply 62 is electrically connected to the No. 1 electromagnetic solenoid coil 61 through a wire. The No. 2 power supply 64 is fixedly installed on the upper end surface of the front cylinder seat 3, and the No. 2 power supply 64 is electrically connected to the No. 2 electromagnetic solenoid coil 63 through a wire. By arranging the No. 1 electromagnetic solenoid coil 61, the No. 2 electromagnetic solenoid coil 63, the No. 1 power supply 62 and the No. 2 power supply 64, when the No. 1 electromagnetic solenoid coil 61 is powered by the No. 1 power supply 62 and the No. 2 electromagnetic solenoid coil 63 is powered by the No. 2 power supply 64, the No. 1 electromagnetic solenoid coil 61 is determined. 1 is the N pole, and the second electromagnetic solenoid coil 63 is the S pole. When the piston rod 4 moves to the right position, the right chamber of the piston rod 4 stops taking in air under the control of the valve, but the gas is compressible, so the piston rod 4 will continue to move forward under the action of inertia. Therefore, in order to accurately position the movement of the piston rod 4 and avoid the piston rod 4 from impacting with the rear cylinder seat 2 or the front cylinder seat 3 and causing damage, when the current of the first electromagnetic solenoid coil 61 and the second electromagnetic solenoid coil 63 is changed, the direction of the current is changed so that the polarity of the magnetic field generated by the second electromagnetic solenoid coil 63 is the N pole, and the first electromagnetic solenoid coil 61 is the S pole. At this time, the piston rod 4 will be affected by an electromagnetic force in the opposite direction of its movement and stop moving quickly.

[0022] The adjustment component 8 includes two moving seats 81, one of which is arranged in the inner cavity of the rear cylinder seat 2, and the other moving seat 81 is arranged in the inner cavity of the front cylinder seat 3. Two connecting rods 811 are fixedly installed on one side of the two moving seats 81, wherein one end of the two adjacent connecting rods 811 is fixedly connected to the outer wall of the No. 1 electromagnetic solenoid coil 61, and one end of the other two adjacent connecting rods 811 is fixedly connected to the outer wall of the No. 2 electromagnetic solenoid coil 63. By driving the moving seat 81 to move horizontally, the moving seat 81 can horizontally move the No. 1 electromagnetic solenoid coil 61 and the No. 2 electromagnetic solenoid coil 63 through the connecting rod 811. Guide blocks 82 are fixedly installed at both ends of the two moving seats 81, and the inner cavities of the rear cylinder seat 2 and the front cylinder seat 3 are provided with two guide grooves 83. The guide blocks 82 are slidably connected to the inner walls of the guide grooves 83. By setting the guide block 82 and the guide groove 83, the guide block 82 can slide horizontally along the inner wall of the guide groove 83, so as to ensure that the movable seat 81 keeps moving in the horizontal direction. A No. 2 groove 84 is provided at one end of the rear cylinder seat 2 and the front cylinder seat 3. The inner walls of the two No. 2 grooves 84 are rotatably installed with screws 85, one of which passes through a movable seat 81 and is threadedly connected to a movable seat 81. By rotating the screw 85, the screw 85 can drive the movable seat 81 to move in the horizontal direction. A rotating seat 86 is fixedly installed at one end of the two screws 85, and a hexagonal groove 87 is provided on one side of the two rotating seats 86. By setting the rotating seat 86 and the hexagonal groove 87, when the hexagonal wrench is inserted into the inside of the hexagonal groove 87, the rotating seat 86 can be rotated by the hexagonal wrench, and the rotating seat 86 causes the screw 85 to rotate.

[0023] The assembly component 7 includes a rubber ring 71 and a connecting sleeve 76; The end of the tie rod 11 is in active contact with the inner wall of the connecting sleeve 76. By providing the connecting sleeve 76, the end of the tie rod 11 can be inserted into the connecting sleeve 76, so that the tie rod 11 is assembled between the rear cylinder seat 2 and the front cylinder seat 3; Two rubber rings 71 are provided, and the end of the cylinder barrel 1 is in active contact with the inner wall of the rubber ring 71. By providing the rubber ring 71, the sealing between the cylinder barrel 1 and the rear cylinder seat 2 and the front cylinder seat 3 can be improved. One rubber ring 71 is fixedly installed on the other end of the rear cylinder seat 2, and the other rubber ring 71 is fixedly installed on the other end of the front cylinder seat 3. A No. 1 groove 72 is provided around the rear cylinder seat 2 and the front cylinder seat 3. A locking screw 73 is rotatably installed on the inner wall of the No. 1 groove 72. Four threaded sleeves 74 distributed in an annular array are fixedly installed at both ends of the cylinder barrel 1. One end of the locking screw 73 is rotatably connected with the inner wall of the threaded sleeve 74. By rotating the locking screw 73, when the locking screw 73 thread enters the interior of the threaded sleeve 74, the locking screw 73 fixes the cylinder barrel 1 between the rear cylinder seat 2 and the front cylinder seat 3. The other end of the locking screw 73 is fixedly installed with a hexagonal seat 75. By providing the hexagonal seat 75, it is convenient for the operator to rotate the hexagonal seat 75 by using an electric tool. Eight connecting sleeves 76 are provided, wherein four adjacent connecting sleeves 76 are distributed in a ring array and fixedly installed at one end of the rear cylinder seat 2 , and another four adjacent connecting sleeves 76 are distributed in a ring array and fixedly installed at one end of the front cylinder seat 3 .

[0024] Working principle: During the assembly of the cylinder, first insert one end of the cylinder barrel 1 into the rubber ring 71 at one end of the rear cylinder seat 2, and insert one end of the four tie rods 11 into the corresponding connecting sleeves 76 and tighten them, then insert the other end of the cylinder barrel 1 into the rubber ring 71 at one end of the front cylinder seat 3, and insert the other ends of the four tie rods 11 into the corresponding connecting sleeves 76. At this time, the piston rod 4 passes through the front cylinder seat 3, and then rotates the eight hexagonal seats 75 respectively. The eight hexagonal seats 75 make the eight locking screws 73 threaded into the corresponding threaded sleeves 74, and the eight locking screws 73 lock the cylinder barrel 1 between the rear cylinder seat 2 and the front cylinder seat 3, thereby facilitating the rapid assembly of the cylinder, thereby effectively improving the convenience of the cylinder assembly operation; When the cylinder is in use, during the movement of the piston rod 4, the first power supply 62 supplies power to the first electromagnetic solenoid coil 61, and the second power supply 64 supplies power to the second electromagnetic solenoid coil 63. At the same time, the direction of the current is changed to change the direction of the magnetic field of the first electromagnetic solenoid coil 61 and the second electromagnetic solenoid coil 63. During the movement, the piston rod 4 will be affected by an electromagnetic force in the opposite direction of its movement and will stop moving quickly, thereby avoiding the piston rod 4 from impacting with the rear cylinder seat 2 or the front cylinder seat 3 and causing damage, reducing the wear of the piston rod 4 and increasing the service life of the cylinder. At the same time, insert a hexagonal wrench into the hexagonal groove 87, and use the hexagonal wrench to rotate the rotating seat 86. The rotating seat 86 rotates the screw 85, and the screw 85 drives the moving seat 81 to move horizontally. The moving seat 81 causes the No. 1 electromagnetic solenoid coil 61 and the No. 2 electromagnetic solenoid coil 63 to move horizontally through the connecting rod 811, thereby changing the distance between the No. 1 electromagnetic solenoid coil 61 and the No. 2 electromagnetic solenoid coil 63 and the two ends of the piston rod 4, and adjusting the degree of electromagnetic buffering, thereby realizing the adjustment of the buffering degree at different distances of the piston rod 4.

[0025] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A cylinder with built-in magnetic ring gas buffer function, characterized in that: The cylinder comprises a cylinder barrel (1), a pull rod (11), a rear cylinder seat (2), a front cylinder seat (3) and a piston rod (4); four pull rods (11) are provided; the cylinder barrel (1) and the pull rod (11) are fixedly assembled between the rear cylinder seat (2) and the front cylinder seat (3); and the piston rod (4) is slidably assembled on the cylinder barrel (1) and the front cylinder seat (3); The rear cylinder seat (2) and the front cylinder seat (3) are provided with an electromagnetic buffer assembly (6), the rear cylinder seat (2) and the front cylinder seat (3) are provided with an adjustment assembly (8), and the rear cylinder seat (2) and the front cylinder seat (3) are provided with an assembly assembly (7) for assembling the cylinder barrel (1) and the pull rod (11).

2. A cylinder with built-in magnetic ring gas buffer function as claimed in claim 1, characterized in that: One side of the rear cylinder seat (2) is equipped with a first gas port (21), and one side of the front cylinder seat (3) is equipped with a second gas port (31).

3. A cylinder with built-in magnetic ring gas buffer function as claimed in claim 1, characterized in that: A sealing gasket (32) is fixedly mounted on one end of the front cylinder seat (3), and the piston rod (4) passes through the sealing gasket (32) and is in active contact with the inner wall of the sealing gasket (32).

4. A cylinder with built-in magnetic ring gas buffer function as claimed in claim 1, characterized in that: The electromagnetic buffer assembly (6) comprises a first electromagnetic solenoid coil (61) and a second electromagnetic solenoid coil (63); The first electromagnetic solenoid coil (61) is arranged in the inner cavity of the rear cylinder seat (2), and the second electromagnetic solenoid coil (63) is arranged in the inner cavity of the front cylinder seat (3); A first power source (62) is fixedly mounted on the upper end surface of the rear cylinder seat (2), and the first power source (62) is electrically connected to a first electromagnetic solenoid coil (61) via a wire; A second power supply (64) is fixedly mounted on the upper end surface of the front cylinder seat (3), and the second power supply (64) is electrically connected to the second electromagnetic solenoid coil (63) via a wire.

5. A cylinder with built-in magnetic ring gas buffer function as claimed in claim 4, characterized in that: The adjustment assembly (8) comprises two movable seats (81), wherein one of the movable seats (81) is arranged in the inner cavity of the rear cylinder seat (2), and the other movable seat (81) is arranged in the inner cavity of the front cylinder seat (3), and two connecting rods (811) are fixedly mounted on one side of the two movable seats (81), wherein one end of two adjacent connecting rods (811) is fixedly connected to the outer wall of the first electromagnetic solenoid coil (61), and another end of two adjacent connecting rods (811) is fixedly connected to the outer wall of the second electromagnetic solenoid coil (63).

6. A cylinder with built-in magnetic ring gas buffer function as claimed in claim 5, characterized in that: Guide blocks (82) are fixedly mounted at both ends of the two movable seats (81); the inner cavities of the rear cylinder seat (2) and the front cylinder seat (3) are each provided with two guide grooves (83); the guide blocks (82) and the inner walls of the guide grooves (83) are slidably connected.

7. A cylinder with built-in magnetic ring gas buffer function as claimed in claim 5, characterized in that: One end of the rear cylinder seat (2) and the front cylinder seat (3) is provided with a second groove (84), and the inner walls of the two second grooves (84) are both rotatably mounted with lead screws (85), wherein one of the lead screws (85) passes through a movable seat (81) and is threadedly rotatably connected to the movable seat (81).

8. A cylinder with built-in magnetic ring gas buffer function as claimed in claim 7, characterized in that: A rotating seat (86) is fixedly mounted on one end of the two lead screws (85), and a hexagonal groove (87) is formed on one side of the two rotating seats (86).

9. A cylinder with built-in magnetic ring gas buffer function as claimed in claim 1, characterized in that: The assembly component (7) comprises a rubber ring (71) and a connecting sleeve (76); Two rubber rings (71) are provided, and the end of the cylinder barrel (1) is in active contact with the inner wall of the rubber ring (71), one of the rubber rings (71) is fixedly mounted on the other end of the rear cylinder seat (2), and the other rubber ring (71) is fixedly mounted on the other end of the front cylinder seat (3), and the rear cylinder seat (2) and the front cylinder seat (3) are provided with a No. 1 groove (72) on all sides, and a locking screw (73) is threadedly rotatably mounted on the inner wall of the No. 1 groove (72), and four threaded sleeves (74) distributed in an annular array are fixedly mounted on both ends of the cylinder barrel (1), and one end of the locking screw (73) is threadedly rotatably connected to the inner wall of the threaded sleeve (74); Eight connecting sleeves (76) are provided, wherein four adjacent connecting sleeves (76) are distributed in a ring array and fixedly mounted on one end of the rear cylinder seat (2), and another four adjacent connecting sleeves (76) are distributed in a ring array and fixedly mounted on one end of the front cylinder seat (3); The end of the pull rod (11) is in movable contact with the inner wall of the connecting sleeve (76).

10. A cylinder with built-in magnetic ring gas buffer function as claimed in claim 9, characterized in that: A hexagonal seat (75) is fixedly mounted on the other end of the locking screw (73).

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