A sealed piston rod end cover

Abstract

The present invention relates to the technical field of piston rods, and discloses a sealed piston rod end cap, comprising a cylinder, an annular groove is provided in the middle of one side of the cylinder, an end cap is movably sleeved on the side of the cylinder close to the annular groove, an annular groove is provided in the middle of the end cap, rectangular grooves are provided in the middle of the top and bottom of the inner cavity of the annular groove, a limiting block is movably sleeved inside the rectangular groove, one end of the limiting block passes through and extends to the inside of the annular groove and is fixedly connected to an annular slider, one side of the annular slider is fixedly connected to a first sealing ring. The sealed piston rod end cap, through the coordinated use of the oblique block, the second sealing ring, the first sealing ring and the annular slider, eliminates gaps between the end cap and the cylinder, as well as between the end cap and the cylinder rod in the cylinder, thereby ensuring that the hydraulic oil in the cylinder will not overflow from the outside of the cylinder, thereby improving the sealing performance of the sealed piston rod end cap.

Description

Technical Field

[0001] The present invention relates to the technical field of piston rods, in particular to a sealed piston rod end cover. Background Art

[0002] The piston rod is a connecting component that supports the piston in doing work. It is mostly used in oil cylinders and cylinder motion actuators. It is a moving component with frequent movements and high technical requirements. Its components include cylinder barrel, oil cylinder rod, piston and end cover. The quality of its processing directly affects the life and reliability of the entire product.

[0003] The piston rod is an energy conversion component that can convert hydraulic pressure into mechanical energy. Therefore, the sealing performance inside the piston rod directly affects the energy conversion efficiency of the piston rod. However, since the end cover of the piston rod and the cylinder barrel are usually fixed with screws, and no sealing structure is used to seal the connection, there is a gap between the end cover and the cylinder barrel. Once the hydraulic oil inside the cylinder barrel overflows the cylinder barrel, the hydraulic oil will overflow from between the end cover and the cylinder barrel, reducing the energy conversion efficiency of the piston rod. In addition, the long-term use of the piston rod makes the screws easily loose due to the vibration of the piston rod, resulting in poor stability. For this reason, a sealed piston rod end cover is introduced. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the present invention provides a sealed piston rod end cover with the advantages of good sealing performance and high stability. It solves the problem that the end cover of the piston rod and the cylinder barrel are usually fixed with screws without using a sealing structure to seal the connection, resulting in a gap between the end cover and the cylinder barrel. Once the hydraulic oil inside the cylinder barrel overflows from the cylinder barrel, the hydraulic oil will overflow from between the end cover and the cylinder barrel, reducing the energy conversion efficiency of the piston rod. In addition, long-term use of the piston rod will make the screws easily loosen due to the vibration of the piston rod, resulting in poor stability.

[0006] (2) Technical solution

[0007] In order to achieve the above-mentioned purpose of good sealing performance and high stability, the present invention provides the following technical solutions: a sealed piston rod end cover, comprising a cylinder, an annular groove is provided in the middle of one side of the cylinder, an end cover is movably sleeved on the side of the cylinder close to the annular groove, an annular groove is provided in the middle of the end cover, a rectangular groove is provided in the middle of the top end and the middle of the bottom end of the inner cavity of the annular groove respectively, a limiting block is movably sleeved inside the rectangular groove, one end of the limiting block passes through and extends to the inside of the annular groove and is fixedly connected to an annular slider, and one side of the annular slider is fixedly connected to a first A sealing ring, the other side of the annular slider is slidably connected to a bevel block, and the other end of the bevel block is fixedly connected to a second sealing ring, the top and bottom ends of the end cover are respectively provided with circular holes, and the middle part of the top of the inner cavity of the circular hole is provided with a through hole, the top and bottom ends of the cylinder barrel close to the end cover are respectively threadedly sleeved with screws located inside the circular hole, one end of the two screws passes through and extends to the outside of the circular hole, the inside of the through hole is movably sleeved with a clip, and the outside of the clip is movably sleeved with an annular spring located on the outside of the end cover, and one end of the screw is provided with a limiting hole located inside the circular hole.

[0008] Preferably, the limiting block is rectangular in shape, and the outside of the limiting block is slidably connected to the inside of the rectangular groove.

[0009] Preferably, the first sealing ring is made of natural rubber, one end of the first sealing ring passes through and extends to the inside of the annular groove, and the outside of the first sealing ring is slidably connected to the inside of the annular groove.

[0010] Preferably, the number of the inclined blocks is twenty to thirty and they are distributed in an annular shape outside the second sealing ring, and the outside of the inclined blocks is slidably connected to the inside of the annular groove.

[0011] Preferably, one end of the clamping strip away from the annular spring passes through the circular hole and extends to the inside of the limiting hole, and the outside of the clamping strip is slidably connected to the inside of the limiting hole.

[0012] Preferably, one end of the annular spring is fixedly connected to one end of the clamping strip, and the other end of the annular spring is fixedly connected to one end outside the end cover.

[0013] (3) Beneficial effects

[0014] Compared with the prior art, the present invention provides a sealed piston rod end cover with the following beneficial effects:

[0015] 1. The sealed piston rod end cover, through the coordinated use of the oblique block, the second sealing ring, the first sealing ring and the annular slider, eliminates any gaps between the end cover and the cylinder barrel, as well as between the end cover and the cylinder rod in the cylinder barrel, thereby ensuring that the hydraulic oil in the cylinder barrel will not overflow to the outside of the cylinder barrel, thereby improving the sealing performance of the sealed piston rod end cover.

[0016] 2. The sealed piston rod end cover, through the coordinated use of annular springs, clamping strips and limiting holes, ensures that when the two screws are rotated to the top and bottom ends of one side of the cylinder respectively, they will not become loose due to the vibration generated by the movement of the cylinder rod, thereby improving the stability of the sealed piston rod end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is an enlarged schematic diagram of point A of the structure of the present invention.

[0019] In the figure: 1. Cylinder; 2. Annular groove; 3. End cover; 4. Annular groove; 5. Rectangular groove; 6. Limit block; 7. Annular slider; 8. First sealing ring; 9. Bevel block; 10. Second sealing ring; 11. Round hole; 12. Through hole; 13. Screw; 14. Card strip; 15. Annular spring; 16. Limit hole. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1-2, a sealed piston rod end cover, including a cylinder 1, an annular groove 2 is opened in the middle of one side of the cylinder 1, and an end cover 3 is movably sleeved on the side of the cylinder 1 close to the annular groove 2, an annular groove 4 is opened in the middle of the end cover 3, and rectangular grooves 5 are respectively opened in the middle of the top and the middle of the bottom of the inner cavity of the annular groove 4. A limiting block 6 is movably sleeved inside the rectangular groove 5. The limiting block 6 is rectangular in shape, and the outside of the limiting block 6 is slidably connected to the inside of the rectangular groove 5. Through the coordinated use of the limiting block 6 and the rectangular groove 5, the first sealing ring 8 and the annular slider 7 will not separate from the end cover 3 when the end cover 3 is separated from the cylinder 1, thereby improving the rationality of the sealed piston rod end cover, one end of the limiting block 6 passes through and extends to the inside of the annular groove 4 and is fixedly connected to the annular slider 7. One side of the slider 7 is fixedly connected with a first sealing ring 8, which is made of natural rubber. One end of the first sealing ring 8 passes through and extends to the inside of the annular groove 2, and the outside of the first sealing ring 8 is slidably connected to the inside of the annular groove 2, ensuring that there is no gap between the annular groove 2 and the first sealing ring 8, preventing the hydraulic oil in the cylinder 1 from flowing out from between the annular groove 2 and the first sealing ring 8, thereby improving the sealing performance of the sealed piston rod end cover. The other side of the annular slider 7 is slidably connected with an inclined block 9. The number of inclined blocks 9 is twenty to thirty and they are distributed in an annular manner on the outside of the second sealing ring 10. The outside of the inclined block 9 is slidably connected to the inside of the annular groove 4. Through the coordinated use of the inclined block 9, the second sealing ring 10, the first sealing ring 8 and the annular slider 7, There is no gap between the end cover 3 and the cylinder barrel 1, and between the end cover 3 and the cylinder rod in the cylinder barrel 1, which ensures that the hydraulic oil in the cylinder barrel 1 will not overflow from the outside of the cylinder barrel 1, thereby improving the sealing performance of the sealed piston rod end cover. The other end of the inclined block 9 is fixedly connected to the second sealing ring 10, and the top and bottom ends of the end cover 3 are respectively provided with circular holes 11, and the middle part of the top of the inner cavity of the circular hole 11 is provided with a through hole 12. The top and bottom ends of the cylinder barrel 1 close to the end cover 3 are respectively threadedly sleeved with screws 13 located inside the circular hole 11, and one end of the two screws 13 passes through and extends to the outside of the circular hole 11, and the inside of the through hole 12 is movably sleeved with a clip 14, and the end of the clip 14 away from the annular spring 15 passes through the circular hole 11 and extends to the inside of the limiting hole 16, and the clip 14 The outside of the clamping strip 14 is slidably connected to the inside of the limiting hole 16, ensuring that the screw 13 and the clamping strip 14 will not shake relative to each other, and the screw 13 will not loosen due to the vibration generated when the piston rod moves, thereby improving the stability of the sealed piston rod end cover. The outside of the clamping strip 14 is movably sleeved with an annular spring 15 located on the outside of the end cover 3. One end of the annular spring 15 is fixedly connected to one end of the clamping strip 14, and the other end of the annular spring 15 is fixedly connected to one end of the outside of the end cover 3. Through the coordinated use of the annular spring 15, the clamping strip 14 and the limiting hole 16, when the two screws 13 are rotated to the top and bottom ends of one side of the cylinder barrel 1 respectively, they will not loosen due to the vibration generated when the cylinder rod moves, thereby improving the stability of the sealed piston rod end cover.One end of the screw 13 is provided with a limiting hole 16 located inside the circular hole 11.

[0022] During operation, first place the end cover 3 into one side of the cylinder 1, pull up the card strip 14 to disengage the card strip 14 from the limiting hole 16, and then rotate the two screws 13 to the top and bottom ends of one side of the cylinder 1 respectively. During the rotation of the screw 13, the end cover 3 and the cylinder 1 approach each other, and one end of the first sealing ring 8 first contacts one side of the inside of the annular groove 2, and then continue to rotate the screw 13, the end cover 3 and the cylinder 1 continue to approach each other, and the first sealing ring 8 pushes the annular slider 7, and the annular slider 7 pushes the bevel block 9 so that the bevel block 9 squeezes the second sealing ring 10, so that the inner wall of the second sealing ring 10 is in close contact with the outer wall of the piston rod. When the outside of the end cover 3 and the inside of one side of the cylinder 1 are in fit, stop rotating the screw 13, and finally loosen the card strip 14. The card strip 14 shrinks inward under the action of the restoring force of the annular spring 15 and engages with the inside of the limiting hole 16.

[0023] In summary, the sealed piston rod end cover, through the coordinated use of the inclined block 9, the second sealing ring 10, the first sealing ring 8 and the annular slider 7, makes it possible for there to be no gaps between the end cover 3 and the cylinder barrel 1, as well as between the end cover 3 and the cylinder rod in the cylinder barrel 1, thereby ensuring that the hydraulic oil in the cylinder barrel 1 will not overflow from the outside of the cylinder barrel 1, thereby improving the sealing performance of the sealed piston rod end cover. Through the coordinated use of the annular spring 15, the card strip 14 and the limiting hole 16, when the two screws 13 are respectively rotated to the top and bottom ends of one side of the cylinder barrel 1, the vibration generated by the movement of the cylinder rod will not occur. The invention also solves the problem that the piston rod end cover 3 and the cylinder barrel 1 are usually fixed with screws 13, but no sealing structure is used to seal the connection, so that there is a gap between the end cover 3 and the cylinder barrel 1. Once the hydraulic oil inside the cylinder barrel 1 overflows the cylinder barrel 1, the hydraulic oil will overflow from between the end cover 3 and the cylinder barrel 1, reducing the energy conversion efficiency of the piston rod. Moreover, the long-term use of the piston rod makes the screws 13 easy to loosen due to the vibration of the piston rod, resulting in poor stability.

[0024] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0025] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A sealed piston rod end cap, comprising a cylinder barrel (1), characterized in that: An annular groove (2) is provided in the middle of one side of the cylinder (1), an end cover (3) is movably sleeved on one side of the cylinder (1) close to the annular groove (2), an annular groove (4) is provided in the middle of the end cover (3), rectangular grooves (5) are provided in the middle of the top and bottom of the inner cavity of the annular groove (4), and a limiting block (6) is movably sleeved inside the rectangular groove (5), one end of the limiting block (6) passes through and extends into the inside of the annular groove (4) and is fixedly connected to an annular slider (7), one side of the annular slider (7) is fixedly connected to a first sealing ring (8), the other side of the annular slider (7) is slidably connected to an inclined block (9), and the other end of the inclined block (9) is fixedly A second sealing ring (10) is fixedly connected, the top and bottom ends of the end cover (3) are respectively provided with circular holes (11), the middle part of the top end of the inner cavity of the circular hole (11) is provided with a through hole (12), the top and bottom ends of the cylinder barrel (1) on the side close to the end cover (3) are respectively threadedly sleeved with screws (13) located inside the circular hole (11), one end of the two screws (13) passes through and extends to the outside of the circular hole (11), the interior of the through hole (12) is movably sleeved with a clamping strip (14), the outside of the clamping strip (14) is movably sleeved with an annular spring (15) located outside the end cover (3), and one end of the screw (13) is provided with a limiting hole (16) located inside the circular hole (11); The shape of the limit block (6) is rectangular, and the outside of the limit block (6) is slidably connected to the inside of the rectangular groove (5); The material of the first sealing ring (8) is natural rubber, one end of the first sealing ring (8) penetrates and extends to the inside of the annular groove (2), and the outside of the first sealing ring (8) is slidably connected to the inside of the annular groove (2); The number of the inclined blocks (9) is twenty to thirty and they are distributed in an annular shape outside the second sealing ring (10), and the outside of the inclined blocks (9) is slidably connected to the inside of the annular groove (4); One end of the clamping strip (14) away from the annular spring (15) passes through the circular hole (11) and extends to the inside of the limiting hole (16), and the outside of the clamping strip (14) is slidably connected to the inside of the limiting hole (16); One end of the annular spring (15) is fixedly connected to one end of the clamping strip (14), and the other end of the annular spring (15) is fixedly connected to one end outside the end cover (3).

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