Double-section air cylinder convenient to disassemble

Abstract

The double-section air cylinder comprises a cylinder barrel, a piston, a telescopic rod and an end cover, the interior of the cylinder barrel is hollow, one end of the cylinder barrel is arranged in a closed mode, the other end of the cylinder barrel is arranged in an open mode, and the end cover is detachably arranged at the end, arranged in the open mode, of the cylinder barrel; the piston is arranged in the cylinder barrel in a sliding mode, the interior of the cylinder barrel is divided into a first cavity and a second cavity through the piston, a first communicating hole is formed in the end cover, a second communicating hole is formed in the cylinder barrel, the first communicating hole is communicated with the first cavity, the second communicating hole is communicated with the second cavity, and the piston is arranged in the cylinder barrel in a sliding mode. And the fixed end of the telescopic rod is fixedly connected with the piston, and the free end of the telescopic rod movably penetrates through the end cover.

Description

Technical Field

[0001] The present application relates to the technical field of cylinders, and in particular to a double-section cylinder that is easy to disassemble. Background Art

[0002] A cylinder is a pneumatic mechanical device. Its working principle is to use gas pressure to push the piston to reciprocate in the cylinder barrel, thereby driving the piston rod fixedly connected to the piston to move along the cylinder barrel. It is an important component of automation equipment and is widely used in industrial fields such as printing, semiconductors and robotics.

[0003] At present, the most widely used cylinders are piston rod cylinders. According to the number of cylinders, piston rod cylinders can be divided into single-section cylinders and double-section cylinders. Double-section cylinders are most widely used in the field of mechanical automation equipment. Double-section cylinders usually include two cylinder barrels, pistons and telescopic rods. Both chambers of the double-section cylinder can be input with compressed air to achieve bidirectional movement of the telescopic rod, which is suitable for linear motion that requires output force in two directions. Due to the high non-rotation accuracy of the double-section cylinder and the small winding degree of the telescopic rod end, it is suitable for high-frequency, high-speed and precise guidance occasions.

[0004] In the prior art, in order to improve the stability of the double-section cylinder during operation, it is necessary to first install the piston and the piston rod as a whole in the cylinder barrel, and then cover the end cover on the cylinder barrel, and the end cover and the cylinder barrel are over-fitted, and then the end cover and the cylinder barrel are tightly connected through mechanical extrusion, so that the end cover and the cylinder barrel cannot be disassembled / or are difficult to disassemble. However, the double-section cylinder is usually used for processing more precise workpieces, and the piston rod has a high frequency of extension and retraction. As the working time increases, the seals in the cylinder barrel will be affected by friction and will wear, thereby reducing the overall working precision of the double-section cylinder. However, because the end cover and the cylinder barrel cannot be disassembled / or are difficult to disassemble, it is inconvenient to replace the seals or maintain the various components, so the double-section cylinder has to be replaced as a whole, and the maintenance cost is high. Utility Model Content

[0005] In order to facilitate maintenance of a dual-section cylinder, the present application provides a dual-section cylinder that is easy to disassemble.

[0006] The present application provides a double-section cylinder that is easy to disassemble and adopts the following technical solution:

[0007] A double-section cylinder that is easy to disassemble comprises a cylinder barrel, a piston, a telescopic rod and an end cover, wherein the interior of the cylinder barrel is hollow, and one end of the cylinder barrel is closed, and the other end of the cylinder barrel is open, and the end cover is detachably arranged at the end of the cylinder barrel in the open arrangement, and the piston is slidably arranged inside the cylinder barrel, and the piston divides the interior of the cylinder barrel into a first chamber and a second chamber, a first connecting hole is provided on the end cover, and a second connecting hole is provided on the cylinder barrel, the first connecting hole is connected to the first chamber, and the second connecting hole is connected to the second chamber, and the fixed end of the telescopic rod is fixedly connected to the piston, and the free end of the telescopic rod movably passes through the end cover.

[0008] By adopting the above technical solution, when the telescopic rod needs to be extended along the cylinder barrel, air enters the second chamber along the second connecting hole, thereby pushing the piston carrying the telescopic rod to move toward the end cover; when the telescopic rod needs to be retracted, air enters the first chamber along the first connecting hole, thereby pushing the piston carrying the telescopic rod to move toward the bottom of the cylinder barrel, and the above process is continued to realize the operation of retracting the telescopic rod and extending it along the end cover; at the same time, the end cover is detachably connected to the cylinder barrel, so when it is necessary to maintain the inside of the cylinder barrel and / or the piston, it is only necessary to remove the end cover along the cylinder barrel. Compared with the double-section cylinder in which the end cover and the cylinder barrel cannot be removable, the double-section cylinder in the present application has lower maintenance cost and is more practical.

[0009] Preferably, the end cover is provided with a plurality of countersunk holes penetrating along the thickness direction, and the cylinder barrel and the end cover are threadedly connected along the plurality of countersunk holes.

[0010] By adopting the above technical solution, the end cover is connected to the cylinder barrel by bolts. When the end cover needs to be separated from the cylinder barrel, it can be achieved by simply removing the bolts. The operation is simple. At the same time, each countersunk hole has a bolt, which increases the stability of the end cover when it is installed on the cylinder barrel. The bolts are placed in the countersunk holes, and the installation surface is relatively flat.

[0011] Preferably, the end cover includes a covering portion and a positioning portion, the covering portion is fixedly connected to the positioning portion, the telescopic rod is slidingly matched with the covering portion and the positioning portion, the positioning portion is arranged in the first chamber, and the positioning portion is transitionally matched with the cylinder.

[0012] By adopting the above technical solution, after the end cover is disassembled and maintained along the cylinder barrel as a whole, the operator only needs to insert the positioning part into the cylinder barrel due to the transition fit between the positioning part and the cylinder barrel. This solves the problem to a certain extent that after the end cover is installed on the cylinder barrel again, the telescopic rod swings during the extension and retraction process due to the large concentricity deviation between the telescopic rod, the covering part and the positioning part.

[0013] Preferably, a first installation groove is formed on the positioning portion, a first sealing rubber ring is arranged in the first installation groove, and the first sealing rubber ring abuts against the inner wall of the cylinder.

[0014] By adopting the above technical solution, a small gap exists between the positioning part and the cylinder barrel due to the transition fit between the positioning part and the cylinder barrel. Therefore, the first sealing rubber ring is soft and easy to deform, so as to fill the gap between the positioning part and the cylinder barrel, thereby playing a positive guiding role in improving the overall sealing of the double-section cylinder.

[0015] Preferably, a friction bushing is provided on the covering portion, the friction bushing is detachably connected to the covering portion, and the telescopic rod is slidably matched with the friction bushing.

[0016] By adopting the above technical solution, when the double-section cylinder works normally, the extension and retraction frequency of the telescopic rod is relatively high, and the mechanical friction generated during the extension and retraction process of the telescopic rod will cause irreversible mechanical loss to the covering part or the telescopic rod, while the friction bushing has the characteristic of wear resistance, thereby playing a positive guiding role in extending the service life of the double-section cylinder; at the same time, during the sliding of the telescopic rod along the friction bushing, the friction bushing limits the movement path of the telescopic rod, thereby reducing the deflection of the telescopic rod during the movement of the telescopic rod.

[0017] Preferably, a dust-proof rubber sleeve is provided on the covering portion, and the telescopic rod is slidably matched with the dust-proof rubber sleeve.

[0018] By adopting the above technical solution, during the extension and retraction of the telescopic rod, dust or other particles may adhere to the telescopic rod, so that the particles or dust enter the cylinder along the gap between the telescopic rod and the friction bushing / or when the particles reach the gap between the friction bushing and the telescopic rod, friction is generated between the telescopic rod and the friction bushing, accelerating the wear of the friction bushing and / or the telescopic rod. Therefore, during the extension and retraction of the telescopic rod, part of the dust or particles is blocked by the dust-blocking rubber sleeve, which plays a positive guiding role in increasing the service life of the double-section cylinder.

[0019] Preferably, shock-absorbing rings are respectively provided at both ends of the piston, and when the piston slides along the inner wall of the cylinder, the shock-absorbing rings located at both ends of the piston can respectively abut against the positioning portion and the bottom of the cylinder.

[0020] By adopting the above technical solution, since the path of the piston moving along the cylinder is limited by the length of the cylinder, when the piston moves along the cylinder toward or away from the positioning portion, it is affected by the air pressure and its final state is respectively in contact with the positioning portion and the bottom of the cylinder. The force generated in this process is shared by the piston and the positioning portion or the bottom of the cylinder. The pressure of the piston directly acting on the positioning portion or the bottom of the cylinder is reduced by the shock-absorbing ring, thereby reducing the noise of the double-section cylinder during operation. At the same time, the problem of damage caused by excessive force on the piston, cylinder or positioning portion is solved to a certain extent.

[0021] Preferably, a guide ring is provided on the piston, and the guide ring is slidingly matched with the inner wall of the cylinder.

[0022] By adopting the above technical solution, during the process of the piston sliding up and down along the cylinder, the guide ring always abuts against the inner wall of the cylinder, providing supporting force for the piston to move along the inner wall of the cylinder, which to a certain extent solves the problem of large deflection of the telescopic rod during extension and retraction due to the large gap between the piston and the cylinder.

[0023] Preferably, the piston is provided with a first seal and a second seal, the cross-section of the first seal and the second seal is U-shaped, and one end of the opening of the first seal faces the bottom of the cylinder, and one end of the opening of the second seal faces the positioning portion.

[0024] By adopting the above technical solution, when the piston moves toward the positioning part, the gas enters the first chamber along the first connecting hole, and at the same time, the gas quickly fills the second seal, and the second seal is quickly propped up by the air pressure and abuts against the inner wall of the cylinder; when the piston moves toward the bottom of the cylinder, the gas enters the second chamber along the second connecting hole, and at the same time, the gas quickly fills the first seal, and the first seal is quickly propped up by the air pressure and abuts against the inner wall of the cylinder; through the above process, the overall sealing is improved, and to a certain extent, the problem of poor sealing, resulting in large power loss when the piston moves along the cylinder carrying the telescopic rod, resulting in too little power output by the telescopic rod is solved.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. The end cover and the cylinder barrel are detachably connected, which is convenient for maintenance. Compared with the non-detachable double-section cylinder, the double-section cylinder of the present application has lower maintenance cost and stronger practicality;

[0027] 2. A transition fit is adopted between the positioning part and the cylinder barrel. When the end cover and the cylinder barrel are assembled again, it is only necessary to insert the positioning part into the cylinder barrel. This solves the problem of the telescopic rod swinging during the telescopic process due to the large concentricity deviation between the telescopic rod, the cover part and the positioning part during the reinstallation process to a certain extent;

[0028] 3. The dust and / or particles are partially blocked by the dust-blocking rubber sleeve so that they cannot enter the first chamber and / or the second chamber, which to a certain extent solves the problem that during the extension and retraction process of the telescopic rod, dust and / or particles generate friction between the telescopic rod and the friction bushing, thereby accelerating the wear rate of the friction bushing and / or the telescopic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of a double-section cylinder that is easy to disassemble in an embodiment of the present application.

[0030] Figure 2 It is a cross-sectional view of one of the double-section cylinders that is easy to disassemble in an embodiment of the present application.

[0031] Figure 3 It is a schematic diagram of the structure of a double-section cylinder that is easy to disassemble after the cylinder barrel and end cover are hidden in an embodiment of the present application.

[0032] Explanation of the reference numerals: 1. Cylinder barrel; 11. First chamber; 12. Second chamber; 13. Second connecting hole; 2. Piston; 21. Damping ring; 22. Guide ring; 23. First sealing member; 24. Second sealing member; 3. Piston rod; 4. End cover; 41. First connecting hole; 42. Covering part; 421. Friction bushing; 422. Dust-proof rubber sleeve; 43. Positioning part; 431. First mounting groove; 5. Countersunk hole; 6. First sealing rubber ring; 7. Clamping groove; 8. Accommodating groove; 9. Second mounting groove; 10. Third mounting groove; 101. Fourth mounting groove. DETAILED DESCRIPTION

[0033] It should be noted that the "transition fit" and "overfit" described in this specification are conventional component tolerance matching methods in the field of mechanical engineering, and their principles will not be elaborated here.

[0034] The following is combined with Figure 1-3 This application is described in further detail.

[0035] The embodiment of the present application discloses a double-section cylinder that is easy to disassemble. Figure 1 and Figure 2 A double-section cylinder that is easy to disassemble includes a cylinder barrel 1, a piston 2, a piston rod 3 and an end cover 4. The cylinder barrel 1 is hollow inside, and one end of the cylinder barrel 1 is closed, and the other end of the cylinder barrel 1 is open. In this embodiment, two cylinder barrels 1 are provided, and the two cylinder barrels 1 are connected to each other at the closed end and are integrally formed using a machine tool. The two cylinder barrels 1 are used to install the piston 2, the piston rod 3 and the end cover 4 respectively.

[0036] Meanwhile, in the dual-section cylinder of the present embodiment, the two sections of the cylinder formed by the connection of the two cylinder barrels 1 are the same in structure, and one of the sections of the cylinder is taken as the detailed description in the following specification.

[0037] Furthermore, the piston 2 is slidably arranged inside the cylinder 1, and the fixed end of the piston rod 3 is fixedly connected to the piston 2. At the same time, the end cover 4 is arranged at the open end of the cylinder 1, and the end cover 4 is removable. When the cylinder 1 and / or the piston rod 3 need to be maintained, the piston 2 and the piston rod 3 can be taken out along the cylinder 1 by simply removing the end cover 4 along the cylinder 1, which is convenient for maintenance.

[0038] Correspondingly, the free end of the piston rod 3 movably passes through the end cover 4 and is connected to the controlled device. When the piston 2 moves along the cylinder body, the piston rod 3 fixedly connected to the piston 2 moves synchronously with the piston 2 to drive the controlled device.

[0039] On the other hand, the piston 2 divides the interior of the cylinder 1 into a first chamber 11 and a second chamber 12. The first chamber 11 is between the end cover 4 and the upper surface of the piston 2, and the second chamber 12 is between the bottom of the cylinder 1 and the lower surface of the piston 2. The end cover 4 is provided with a first connecting hole 41, and the cylinder 1 is provided with a second connecting hole 13. The first connecting hole 41 is connected to the first chamber 11, and the second connecting hole 13 is connected to the second chamber 12. Threads are respectively provided in the first connecting hole 41 and the second connecting hole 13, and the cylinder can be connected to the air compressor through a threaded joint. When the compressed air enters the second chamber 12, the compressed air quickly pushes the piston 2 to carry the piston rod 3 to extend along the end cover 4; correspondingly, when the compressed air is connected to the first chamber 11, the compressed air quickly pushes the piston 2 to carry the piston 2 rod to retract along the end cover 4. Repeating the above process can achieve continuous extension and retraction of the piston 2 along the end cover 4.

[0040] Reference Figure 1 and Figure 2 The end cover 4 is provided with a plurality of countersunk holes 5 along the thickness direction, and the cylinder barrel 1 and the end cover 4 are threadedly connected along the plurality of countersunk holes 5 .

[0041] Specifically, the end cover 4 includes a covering portion 42 and a positioning portion 43, and the covering portion 42 is fixedly connected to the positioning portion 43. In the present embodiment, the covering portion 42 and the positioning portion 43 are integrally formed, and the covering portion 42 and the positioning portion 43 are penetrated from their geometric centers along the thickness direction to form a through hole (not shown in the figure) for the piston rod 3 to slide. When the piston rod 3 is slidably arranged on the covering portion 42 and the positioning portion 43, a gap for air circulation is formed between the inner wall of the through hole and the piston rod 3, and the air can pass through the gap along the first connecting hole 41 to reach the first chamber 11.

[0042] Furthermore, the positioning portion 43 is arranged in the first chamber 11, and the positioning portion 43 is transitionally matched with the cylinder barrel 1. Therefore, after the maintenance of the piston rod 3 or the piston 2 is completed, the operator only needs to insert the positioning portion 43 into the cylinder barrel 1. This solves to a certain extent the problem that after the end cover 4 is installed in the cylinder barrel 1, the piston rod 3 swings during the extension and retraction process due to the large concentricity deviation between the piston rod 3 and the covering portion 42 and the positioning portion 43.

[0043] Correspondingly, a first mounting groove is provided on the positioning portion 43. The first mounting groove is provided along the connection between the positioning portion 43 and the covering portion 42, and the first mounting groove is arranged in a ring shape. A first sealing rubber ring 6 is arranged in the first mounting groove. The first sealing rubber ring 6 can be made of silicone material. When the positioning portion 43 is inserted into the cylinder barrel 1, since the first sealing rubber ring 6 itself has the characteristics of being soft and easy to deform, the first sealing rubber ring 6 can fill the gap between the positioning portion 43 and the cylinder barrel 1, thereby improving the sealing performance.

[0044] At the same time, a number of countersunk holes 5 are provided on the covering portion 42. In the present embodiment, four countersunk holes 5 are provided. The four countersunk holes 5 are provided in a matrix on the covering portion 42. When the positioning portion 43 is inserted into the cylinder barrel 1, the four bolt holes are exactly aligned with the bolt holes provided on the cylinder barrel 1, and the covering portion 42 is abutted against the end face of the cylinder barrel 1. At this time, the covering portion 42 can be fixed to the cylinder barrel 1 by bolts, and disassembly and assembly are convenient.

[0045] Reference Figure 2 and Figure 3 A friction bushing 421 is provided on the covering portion 42 , and the friction bushing 421 is detachably connected to the covering portion 42 , and the piston rod 3 is slidably matched with the friction bushing 421 .

[0046] Specifically, the cross-sectional shape of the friction bushing 421 is set in a circular ring shape, and is overfitted with the through hole opened on the cover part 42. In this embodiment, the material of the friction bushing 421 is copper material, which has excellent wear resistance and low friction coefficient, which helps to reduce the friction force on the piston rod 3 when sliding along the friction bushing 421. When the double-section cylinder works normally, the frequency of the expansion and contraction of the piston rod 3 is high. The mechanical friction generated during the expansion and contraction of the piston rod 3 will cause irreversible mechanical loss to the cover part 42 or the piston rod 3. The wear-resistant characteristics of the friction bushing 421 play a positive guiding role in extending the service life of the cylinder. When the friction bushing 421 is worn, it only needs to be replaced.

[0047] At the same time, the movement path of the piston rod 3 is limited by the friction bushing 421, so that the piston rod 3 can only reciprocate along the friction bushing 421, further reducing the deflection of the piston rod 3 during the movement.

[0048] Continue to refer to Figure 2 and Figure 3 A dust-proof rubber sleeve 422 is provided on the covering portion 42 . The dust-proof rubber sleeve 422 can be made of a soft rubber material. The piston rod 3 is slidably matched with the dust-proof rubber sleeve 422 .

[0049] Specifically, a clamping groove 7 is provided along the geometric center to the edge of the end of the covering portion 42 away from the positioning portion 43, and the dust-proof rubber sleeve 422 is clamped in the clamping groove 7. When the piston rod 3 is retracted or extended along the covering portion 42, particles or dust in the air will adhere to the outer wall of the piston rod 3. Therefore, when the piston rod 3 is retracted along the covering portion 42, the dust-proof rubber sleeve 422 scrapes off part of the particles and / or dust attached to the outer wall of the piston rod 3, thereby reducing the amount of particles and / or dust entering the first chamber 11 and the second chamber 12 along the gap between the friction bushing 421 and the piston rod 3, and also reducing the amount of dust and / or particles staying between the friction bushing 421 and the piston rod 3 to a certain extent, and solving the problem that the friction between the friction bushing 421 and the piston rod 3 increases due to dust and / or particles staying between the friction bushing 421 and the piston rod 3, thereby accelerating the wear speed of the friction bushing 421 and / or the piston rod 3.

[0050] Reference Figure 2 and Figure 3 Shock-absorbing rings 21 are respectively provided at both ends of the piston 2. When the piston 2 slides along the inner wall of the cylinder 1, the shock-absorbing rings 21 located at both ends of the piston 2 can respectively abut against the positioning portion 43 and the bottom of the cylinder 1.

[0051] Specifically, the piston 2 is provided with receiving grooves 8 at both ends of its edge from its geometric center along its length direction. The receiving groove 8 is formed by being recessed from the outside of the piston 2 to the geometric center of the piston 2 , and the shock-absorbing ring 21 is installed in the receiving groove 8 .

[0052] Because the movement path of the piston 2 along the cylinder 1 is limited by the length of the cylinder 1, when the piston 2 moves along the cylinder 1 toward the positioning portion 43 or away from the positioning portion 43, it is affected by the air pressure and its final state is respectively in contact with the positioning portion 43 and the bottom of the cylinder 1. The force generated in this process is shared by the piston 2 and the positioning portion 43 or the bottom of the cylinder 1. The shock-absorbing ring 21 reduces the pressure of the piston 2 directly acting on the positioning portion 43 or the bottom of the cylinder 1, thereby reducing the noise of the double-section cylinder when working. At the same time, it solves to a certain extent the problem of damage to the piston 2 or the cylinder 1 due to excessive force on the piston 2, the cylinder 1 or the positioning portion 43.

[0053] Continue to refer to Figure 2 and Figure 3 A guide ring 22 is provided on the piston 2, and the guide ring 22 is slidably matched with the inner wall of the cylinder 1.

[0054] Specifically, the piston 2 is recessed inward along the circumferential direction to its geometric center to form a second installation groove 9. The second installation groove 9 can be located at any position of the piston 2 between the two receiving grooves 8. In the present embodiment, the receiving groove 8 is located on one side of the receiving groove 8 near the bottom of the cylinder barrel 1. The guide ring 22 is installed in the receiving groove 8. The guide ring 22 fills the gap between the piston 2 and the cylinder barrel 1. When the piston 2 moves along the cylinder barrel 1, the movement path of the piston 2 is on the same axis, thereby reducing the deflection of the piston 2 in the process of carrying the piston rod 3 and improving the stability of the piston rod 3 in the process of movement.

[0055] Reference Figure 2 and Figure 3 A first seal 23 and a second seal 24 are provided on the piston 2. The cross-sectional shape of the first seal 23 and the second seal 24 is U-shaped, and the open end of the first seal 23 faces the bottom of the cylinder 1, and the open end of the second seal 24 faces the positioning portion 43.

[0056] Specifically, the piston 2 is recessed inward along the circumferential direction to its geometric center to form a third mounting groove 10 and a fourth mounting groove 101, and the first seal 23 and the second seal 24 are respectively installed in the third mounting groove 10 and the fourth mounting groove 101. Through the limiting effect of the third mounting groove 10 and the fourth mounting groove 101, the probability of the first seal 23 and / or the second seal 24 falling off along the piston 2 is reduced.

[0057] Its function is that when the piston rod 3 needs to contract, when the gas enters the first chamber 11 along the first connecting hole 41, the air quickly props up the second sealing member 24, so that one end of the second sealing member 24 is in contact with the inner wall of the cylinder 1. At the same time, the air in the second chamber 12 will be discharged, but the gas cannot be discharged instantly along the second connecting hole 13, and part of the air in the second chamber 12 is compressed. At this time, the first sealing member 23 is affected by the compressed gas, and the second sealing member 24 is propped up by the gas. One end of the second sealing member 24 can also be in contact with the inner wall of the cylinder 1, so that the gas in the first chamber 11 cannot reach the second chamber 12 through the first sealing member 23 and the second sealing member 24. At the same time, the gas in the second chamber 12 cannot reach the first chamber 11 through the first sealing member 23 and the second sealing member 24, thereby improving the overall sealing performance and, to a certain extent, solving the problem that the piston 2 loses a lot of power when carrying the piston rod 3 along the cylinder 1 due to poor sealing performance, resulting in too little power output by the piston rod 3.

[0058] The implementation principle of the double-section cylinder that is easy to disassemble in the embodiment of the present application is as follows: the operator inserts the positioning part 43 into the cylinder barrel 1, at which time the first sealing rubber ring 6 fills the gap between the cylinder barrel 1 and the positioning part 43 to improve the sealing performance, and then the cover part 42 is fixed to the cylinder barrel 1 with bolts. Through the positioning function of the positioning part 43, the operator only needs to insert the positioning part 43 into the cylinder barrel 1, which solves the problem that the piston rod 3 swings during the extension and contraction process due to the large concentricity deviation between the piston rod 3 and the cover part 42 and the positioning part 43 after the end cover 4 is installed on the cylinder barrel 1 again to a certain extent, and it is easy to disassemble and install the end cover 4. At the same time, the dust-proof rubber sleeve 422 is used to block part of the particles and / or dust outside the end cover 4, thereby reducing the amount of particles and / or dust entering the first chamber 11 and / or the second chamber 12 along the friction bushing 421 and the piston rod 3, and reducing the probability of particles and / or dust being retained in the gaps between the components, causing the friction between the components to increase and the wear speed to accelerate.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A double-section cylinder that is easy to disassemble, characterized in that: The invention comprises a cylinder (1), a piston (2), a piston rod (3) and an end cover (4); the cylinder (1) is hollow inside, and one end of the cylinder (1) is closed, while the other end of the cylinder (1) is open; the end cover (4) is detachably arranged at the end of the cylinder (1) which is in the open arrangement; the piston (2) is slidably arranged inside the cylinder (1); the piston (2) divides the inside of the cylinder (1) into a first chamber (11) and a second chamber (12); a first connecting hole (41) is provided on the end cover (4); a second connecting hole (13) is provided on the cylinder (1); the first connecting hole (41) is connected to the first chamber (11), and the second connecting hole (13) is connected to the second chamber (12); the fixed end of the piston rod (3) is fixedly connected to the piston (2), and the free end of the piston rod (3) movably passes through the end cover (4).

2. The double-section cylinder that is easy to disassemble according to claim 1 is characterized in that: The end cover (4) is provided with a plurality of countersunk holes (5) penetrating along the thickness direction, and the cylinder barrel (1) and the end cover (4) are threadedly connected along the plurality of countersunk holes (5).

3. The double-section cylinder that is easy to disassemble according to claim 1 is characterized in that: The end cover (4) comprises a covering portion (42) and a positioning portion (43), the covering portion (42) being fixedly connected to the positioning portion (43), the piston rod (3) being slidingly matched with the covering portion (42) and the positioning portion (43), the positioning portion (43) being arranged in the first chamber (11), and the positioning portion (43) being transitionally matched with the cylinder barrel (1).

4. The double-section cylinder that is easy to disassemble according to claim 3 is characterized in that: The positioning portion (43) is provided with a first installation groove (431), a first sealing rubber ring (6) is arranged in the first installation groove (431), and the first sealing rubber ring (6) is in contact with the inner wall of the cylinder barrel (1).

5. The double-section cylinder that is easy to disassemble according to claim 3 is characterized in that: The covering portion (42) is provided with a friction bushing (421), the friction bushing (421) is detachably connected to the covering portion (42), and the piston rod (3) is slidably matched with the friction bushing (421).

6. The double-section cylinder that is easy to disassemble according to claim 3 is characterized in that: The covering portion (42) is provided with a dust-proof rubber sleeve (422), and the piston rod (3) is slidably matched with the dust-proof rubber sleeve (422).

7. The double-section cylinder that is easy to disassemble according to claim 3 is characterized in that: Shock-absorbing rings (21) are respectively provided at both ends of the piston (2); when the piston (2) slides along the inner wall of the cylinder (1), the shock-absorbing rings (21) located at both ends of the piston (2) can respectively abut against the positioning portion (43) and the bottom of the cylinder (1).

8. The easily disassembled dual-section cylinder according to claim 4, characterized in that: The piston (2) is provided with a guide ring (22), and the guide ring (22) is slidably matched with the inner wall of the cylinder (1).

9. The easily disassembled dual-section cylinder according to claim 4, characterized in that: The piston (2) is provided with a first sealing member (23) and a second sealing member (24); the cross-sectional shapes of the first sealing member (23) and the second sealing member (24) are U-shaped, and an open end of the first sealing member (23) faces the bottom of the cylinder (1), while an open end of the second sealing member (24) faces the positioning portion (43).

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