High-performance buffer

Abstract

The utility model discloses a high-performance buffer, which belongs to the technical field of buffers and comprises a cylinder body, a piston component and a piston rod, a buffer spring and damping oil are arranged in a cylinder cavity of the cylinder body, the piston component comprises a buffer plate, a limit seat and an oil passing ring, the oil passing ring is positioned between the buffer plate and the limit seat, and a moving distance is reserved between the buffer plate and the limit seat. The diameter of an inner ring of the oil passing ring is larger than that of the piston rod, an oil passing opening is formed in the limiting seat, the outer ring wall of the oil passing ring is divided into an oil passing section and a sealing section sealed with a cylinder cavity, the diameter of the oil passing section is smaller than that of the cylinder cavity, an oil passing channel is formed in the end face of the oil passing section, and a first oil opening communicated with the oil passing channel is formed in the inner ring wall of the oil passing ring. The oil passing section is provided with a second oil port communicated with the oil passing channel, and the diameter of the buffer plate is between the oil passing section and the cylinder cavity. And during resetting, the oil passing ring is separated from the buffer plate, so that the damping oil flows through the inner ring instead of the oil groove channel, the flowing speed of the damping oil is increased, and the piston assembly is quickly reset.

Description

Technical Field

[0001] The utility model relates to the technical field of buffers, in particular to a high-performance buffer. Background Art

[0002] Buffers are used in various fields, and their main function is to act as buffers. For example, in the field of furniture, buffers are used on hinges to ensure that doors or windows will not be subjected to large impact forces when opening or closing, thereby protecting the safety of doors or personnel. The buffer mainly includes a cylinder body, a piston, a piston rod and a buffer spring. The cylinder cavity of the cylinder body is filled with damping oil, the piston is located in the cylinder cavity, and the piston rod is connected to the piston, such as the "high-performance buffer" disclosed in patent number "201710018188.6" and the "American high-performance buffer" disclosed in patent number "202021391630.3". When the piston rod is pressed, the piston rod pushes the piston to move and compresses the buffer spring. When the damping oil flows quantitatively through the piston through the oil passage, it will generate hydraulic resistance to the piston, which cooperates with the elastic resistance of the buffer spring to achieve a buffering effect. However, there are many problems with the current buffers: First, the piston resets slowly, and the damping oil can only flow back quantitatively through the oil passage during reset. The quantitative return method results in a slow reset speed; second, when the piston moves to the bottom of the cylinder, the compressed damping oil is prone to rebound when the piston closes, and the buffer is used for hinges; third, an additional outer shell is required to connect the hinge, that is, the buffer is installed in the outer shell, and then the outer shell is installed on the hinge, and the assembly process is cumbersome. Utility Model Content

[0003] The purpose of the utility model is to solve the above-mentioned technical problems and to provide a high-performance buffer, which improves the piston assembly. When the piston assembly is reset, the oil ring will move toward the limit seat, and the buffer plate will be separated from the oil ring, so that the oil groove and the inner ring of the oil ring are exposed, and the damping oil on the back side of the buffer plate will flow through the large flow channel of the inner ring instead of the small flow channel of the oil groove, thereby speeding up the circulation speed of the damping oil, greatly reducing the reset damping force, and the buffer spring can quickly push the buffer plate outward to achieve rapid reset of the piston assembly.

[0004] To achieve the above-mentioned purpose, the utility model provides the following scheme: the utility model discloses a high-performance buffer, including a cylinder body with a cylinder cavity, a piston assembly arranged in the cylinder cavity and a piston rod connected to the piston assembly, the piston rod extends out of one end of the cylinder cavity, the other end of the cylinder cavity is provided with a buffer spring for tightening the piston assembly, the cylinder cavity is filled with damping oil, the piston assembly includes a buffer plate, a limit seat and an oil ring sleeved on the piston rod, the buffer plate and the limit seat are fixedly connected to the piston rod, a moving distance is provided between the buffer plate and the limit seat for the oil ring to move, the limit seat is in contact with the buffer spring, and the The oil passing ring is located between the buffer plate and the limit seat, the inner ring diameter of the oil passing ring is larger than the piston rod, the limit seat is provided with an oil passing port corresponding to the inner ring of the oil passing ring, the outer ring wall of the oil passing ring is divided into a sealing section and an oil passing section along the axis, the sealing section is sealed in contact with the cylinder cavity, the oil passing section faces the buffer plate, the diameter of the oil passing section is smaller than the cylinder cavity, an oil passing groove is provided on the end surface of the oil passing section facing the buffer plate, a first oil port connected to one end of the oil passing groove is provided on the inner ring wall of the oil passing ring, a second oil port connected to the other end of the oil passing groove is provided on the oil passing section, and the diameter of the buffer plate is between the oil passing section and the cylinder cavity.

[0005] Preferably, the oil passage channel is a semi-annular channel.

[0006] Preferably, the cylinder body is a plastic body, and the diameter of the sealing section is larger than the diameter of the cylinder body.

[0007] Preferably, a pressure relief chamber coaxially arranged with the cylinder cavity is provided in the cylinder body, the diameter of the pressure relief chamber gradually increases, the small diameter end of the pressure relief chamber is connected to the end of the cylinder cavity away from the piston rod, the diameter of the small diameter end of the pressure relief chamber is the same as the diameter of the cylinder cavity, the pressure relief chamber has a pressure relief position from the small diameter end to the large diameter end, the diameter of the pressure relief position is larger than the sealing section of the oil ring, and the buffer spring is installed at the large diameter end of the pressure relief chamber.

[0008] Preferably, the buffer spring is a tower spring, one end of the tower spring abuts against the end surface of the large diameter end of the pressure relief chamber, and the other end of the tower spring abuts against the limit seat.

[0009] Preferably, an installation opening is provided at one end of the cylinder cavity from which the piston rod extends, the diameter of the installation opening is larger than the cylinder cavity, a sealing ring and a pressure cover for pressing the sealing ring onto the installation opening are provided at the installation opening, and the sealing ring and the pressure cover are both sleeved on the piston rod.

[0010] Preferably, two hinged ear plates are provided on the cylinder body, and the two hinged ear plates are located on both sides of the piston rod. The hinged ear plates are provided with mounting holes and hinge holes. The mounting holes are connected to the bracket part of the hinge through a connecting piece, and the hinge holes are hinged to the hinge part of the hinge through a hinge shaft.

[0011] Preferably, a back plate supporting the two hinged ear plates is provided on the cylinder body.

[0012] Preferably, plug-in blocks are provided on both sides of the hinged back plate, and plug-in grooves for plugging in the plug-in blocks are provided on the hinged ear plates.

[0013] Preferably, a positioning head is provided on the plug-in block, a positioning hole is provided in the plug-in slot, and the positioning hole is located on the plug-in path of the positioning head.

[0014] Compared with the prior art, the utility model has achieved the following technical effects:

[0015] 1. In the high-performance buffer of the utility model, the piston assembly is composed of a buffer plate, a limit seat and an oil ring. The oil ring can move between the buffer plate and the limit seat. During the buffering process, the oil ring will move toward the buffer plate and stick to the surface of the buffer plate, so that the oil channel and the inner ring of the oil ring are closed by the buffer plate. At this time, the damping oil can only enter the oil channel through the first oil port and then flow out from the second oil port, so that the damping oil can only flow quantitatively through the small flow channel of the oil channel, thereby generating a high damping force on the buffer plate, thereby effectively buffering. In the resetting process, the oil channel The ring will move toward the limit seat, and the buffer plate will no longer close the oil groove and the inner ring of the oil ring. The damping oil on the back of the buffer plate will flow through the large flow channel of the inner ring, and the damping oil will quickly move toward the positive side of the buffer plate, causing the damping force on the back of the buffer plate to drop significantly. The buffer spring can quickly push the buffer plate outward, thereby accelerating the reset speed and realizing rapid reset of the piston assembly. This high-performance buffer can be used in various scenarios that require buffering, such as construction, furniture, automobiles, machinery and other fields, especially in hinges, such as vehicle hinges, furniture hinges, etc.

[0016] 2. In the high-performance buffer of the utility model, a pressure relief chamber is arranged at one end of the cylinder chamber away from the piston rod, and a pressure relief position is arranged in the pressure relief chamber. When the piston assembly moves in the cylinder chamber, the damping oil can only flow through the inner ring. When the oil ring of the piston assembly reaches the pressure relief position, because the diameter of the pressure relief position is larger than the diameter of the oil ring, an annular gap will be generated between the oil ring and the pressure relief chamber to unload the oil, and the oil will be unloaded together with the inner ring. The gap will continue to increase with the movement, thereby forming a large channel for unloading the oil, thereby accelerating the circulation of the damping oil.

[0017] 3. In the high-performance buffer of the utility model, two hinged ear plates are provided on the cylinder body. When applied to a hinge, the buffer can be directly assembled and used with the hinge part through the two hinged ear plates. There is no need to add a shell part to install the buffer on the hinge, and the assembly process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic diagram of the three-dimensional structure of a high-performance buffer;

[0020] Figure 2 Exploded view of a high performance buffer:

[0021] Figure 3 It is a partial cross-sectional view of a high-performance buffer;

[0022] Figure 4 It is a schematic diagram of the internal structure of the high-performance buffer;

[0023] Figure 5 It is a structural schematic diagram of the cylinder body;

[0024] Figure 6 Schematic diagram of the internal structure of the cylinder;

[0025] Figure 7 is a three-dimensional side view of the cylinder body;

[0026] Figure 8 is a schematic diagram of the structure of the back panel;

[0027] Fig. 9 It is a top view of the three-dimensional structure of the piston rod and the piston assembly;

[0028] Fig.10 It is a bottom-up three-dimensional structural schematic diagram of a piston rod and a piston assembly;

[0029] Fig.11 It is a schematic diagram of the three-dimensional structure of the oil ring;

[0030] Fig.12 This is a position relationship diagram of the oil ring, buffer plate and limit seat when the piston assembly is compressed;

[0031] Fig.13 This is a position relationship diagram of the oil ring, buffer plate and limit seat when the piston assembly is reset;

[0032] Fig.14 is a partial cross-sectional view of a piston assembly;

[0033] Fig.15 This is the unfolded view of the hinge (with high-performance buffer installed);

[0034] Fig.16 Closed view of the hinged (with high-performance buffer installed).

[0035] Description of the drawings: 1. Cylinder body; 2. Piston rod; 3. Articulated ear plate; 4. Back plate; 5. Pressure cover; 6. Buffer spring; 7. Sealing ring; 8. Buffer plate; 9. Limit seat; 10. Oil ring; 11. Cylinder cavity; 12. Pressure relief cavity; 13. Mounting port; 14. Oil port; 15. Oil channel; 16. First oil port; 17. Second oil port; 18. Mounting hole; 19. Articulated hole; 20. Plug-in groove; 21. Positioning hole; 22. Plug-in block; 23. Positioning head; 24. Bracket part; 25. Articulated part. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] This embodiment provides a high performance buffer, such as Figures 1 to 16As shown, it includes a cylinder body 1, a piston rod 2, a piston assembly and a buffer spring 6. A cylinder cavity 11 is provided in the cylinder body 1, and damping oil is filled in the cylinder cavity 11. The piston assembly is arranged in the cylinder cavity 11, and the piston rod 2 is connected to the piston assembly. The piston rod 2 is slidably connected to the cylinder body 1, and the piston rod 2 is coaxially arranged with the cylinder cavity 11. The cylinder cavity 11 extends out of one end of the cylinder cavity 11, and the buffer spring 6 is arranged at the other end of the cylinder cavity 11. The buffer spring 6 presses the piston assembly tightly, and is used to press the piston assembly against the end of the cylinder cavity 11 where the piston rod 2 is provided. Among them, the piston assembly includes a buffer plate 8, a limit seat 9 and an oil ring 10. The buffer plate 8 and the limit seat 9 are fixedly connected to the piston rod 2, and the buffer plate 8 and the cylinder cavity 11 are coaxially arranged. Preferably, the limit seat 9 is fixedly connected to the end of the piston rod 2, and the limit seat 9 contacts the buffer spring 6. The buffer spring 6 presses the limit seat 9 tightly to push the buffer plate 8 against the end of the cylinder cavity 11. The oil ring 10 is set on the piston rod 2 through its inner ring sleeve. The oil ring 10 is located between the buffer plate 8 and the limit seat 9. There is a certain moving distance between the buffer plate 8 and the limit seat 9. The moving distance is reduced to allow the oil ring 10 to move along the axis direction of the piston rod 2. The inner ring diameter of the oil ring 10 is larger than the rod diameter of the piston rod 2. The limit seat 9 is provided with an oil port 14. The oil port 14 corresponds to the inner ring of the oil ring 10. The damping oil in the cylinder cavity 11 can flow through the limit seat 9 through the oil port 14, and then flow into the inner ring of the oil ring 10. The outer ring wall of the oil ring 10 is divided into a sealing section and an oil section along the axis. The sealing section is sealed with the cylinder cavity 11. The sealing section faces the buffer spring 6, and the oil section faces the buffer plate 8. The diameter of the oil section is smaller than the cylinder cavity 11, so that there is a gap between the oil section of the oil ring 10 and the cylinder cavity 11 for the damping oil to flow through. An oil passage groove 15 is provided on the end surface of the oil passage section facing the buffer plate 8, a first oil port 16 is provided on the inner ring wall of the oil passage ring 10, the first oil port 16 is connected to one end of the oil passage groove 15, and a second oil port 17 is provided on the oil passage section of the oil passage ring 10, the second oil port 17 is connected to the other end of the oil passage groove 15. The damping oil flowing into the inner ring of the oil passage ring 10 from the oil passage port 14 will enter the oil passage groove 15 through the first oil port 16, and then flow out from the second oil port 17. The diameter of the buffer plate 8 is between the oil passage section and the cylinder cavity 11, that is, the diameter of the buffer plate 8 is larger than the oil passage section, but smaller than the cylinder cavity 11, so that the buffer plate 8 can cover the end surface of the oil passage section, and at the same time there is a gap between the buffer plate 8 and the cylinder cavity 11 for the damping oil to flow through. The damping oil flow rate generated by reducing the gap between the inner ring of the oil ring 10 and the piston rod 2 must be greater than the quantitative flow rate of the oil channel 15, and the damping oil flow rate through the oil port 14 must be greater than the damping oil flow capacity of the gap between the inner ring of the oil ring 10 and the piston rod 2.

[0038] Working principle:

[0039] ① Buffering process: The piston rod 2 is subjected to axial pressure to push the piston assembly into the cylinder cavity 11, and the limit seat 9 compresses the buffer spring 6. The damping oil in the cylinder cavity 11 flows through the limit seat 9 through the oil port 14, and then pushes the oil ring 10 to move toward the buffer plate 8 until the end surface of the oil section of the oil ring 10 fits with the plate surface of the buffer plate 8 (refer to Fig.12 As shown), at this time, the oil channel 15 is covered by the buffer plate 8. At this time, the damping oil can only enter the oil channel 15 from the first oil port 16, and then flow out from the second oil port 17. The damping oil that flows out flows quantitatively through the gap between the buffer plate 8 and the cylinder cavity 11. During the flow, a high damping force is generated on the buffer plate 8, which cooperates with the compression elastic force of the buffer spring 6 to make the piston rod 2 have a buffering effect.

[0040] ②Reset process: After the piston rod 2 loses the external axial pressure, the limit seat 9 is pushed outward under the reset elastic force of the buffer spring 6, and the limit seat 9 drives the piston rod 2 to move away from the cylinder cavity 11. The damping oil on the back side of the buffer plate 8 flows into the gap between the buffer plate 8 and the cylinder cavity 11, and then pushes the oil ring 10 in the direction of the limit seat 9. The end surface of the oil passing section of the oil ring 10 will be separated from the buffer plate 8 (refer to Fig.13 As shown in the figure, at this time, the damping oil will flow out from the end face of the oil-passing section and the buffer plate 8 through the inner ring of the oil ring 10, instead of flowing into the oil-passing channel 15 from the second oil port 17 and then out from the first oil port 16. This method can greatly speed up the flow of the damping oil back to the cylinder cavity 11 facing the positive side of the buffer plate 8, so as to reduce the damping force on the buffer plate 8 and speed up the reset speed of the buffer plate 8, thereby realizing the rapid reset of the piston assembly.

[0041] Further, in this embodiment, if Figures 1 to 16 As shown, the oil passage channel 15 is a semi-annular channel, and the center of the semi-annular channel coincides with the center of the inner ring of the oil passage ring 10 .

[0042] In this embodiment, Figures 1 to 16 As shown, the cylinder body 1 is a plastic body, and the diameter of the sealing section of the oil ring 10 is larger than the diameter of the cylinder body 1. When the oil ring 10 moves along the axial direction of the cylinder cavity 11, the plastic body of the cylinder body 1 is elastic and can expand outward with the movement of the sealing section, and then reset after the sealing section passes, so that the oil ring 10 and the cylinder body 1 have an interference fit to ensure the sealing.

[0043] Further, in this embodiment, if Figures 1 to 16As shown, a pressure relief chamber 12 is provided in the cylinder body 1. The pressure relief chamber 12 is coaxially arranged with the cylinder chamber 11. The diameter of the pressure relief chamber 12 gradually increases. The small diameter end of the pressure relief chamber 12 is connected with the end of the cylinder chamber 11 away from the piston rod 2. The diameter of the small diameter end of the pressure relief chamber 12 is the same as the diameter of the cylinder chamber 11. The pressure relief chamber 12 has a pressure relief position from the small diameter end to the large diameter end. The diameter of the pressure relief position is larger than the sealing section of the oil ring 10. The buffer spring 6 is installed at the large diameter end of the pressure relief chamber 12. When the piston assembly enters the pressure relief chamber 12 and the oil ring 10 of the piston assembly reaches the pressure relief position of the pressure relief chamber 12, a gap will be generated between the oil ring 10 and the pressure relief chamber 12. The damping oil in the pressure relief chamber 12 will flow through the gap and enter the back side of the buffer plate 8, so that no damping oil will remain between the oil ring 10 and the large diameter end of the pressure relief chamber 12, thereby ensuring that the piston assembly can be completely closed and avoiding rebound due to the residual damping oil when closing.

[0044] Further, in this embodiment, if Figures 1 to 16 As shown, the buffer spring 6 is a tower spring, one end of which abuts against the end surface of the large diameter end of the pressure relief chamber 12, and the other end of which abuts against the limit seat 9. Of course, the above is only a preferred embodiment, and does not mean that the buffer spring 6 can only be a tower spring, as long as it can play a supporting and resetting role. Compression springs can be used.

[0045] In this embodiment, Figures 1 to 16 As shown, a mounting opening 13 is provided at one end of the cylinder cavity 11 from which the piston rod 2 extends. The diameter of the mounting opening 13 is larger than that of the cylinder cavity 11, so that a step surface is formed between the mounting opening 13 and the cylinder cavity 11. A gland 5 and a sealing ring 7 are provided at the mounting opening 13. The sealing ring 7 fits the step surface. The gland 5 is fixed at the mounting opening 13 and the sealing ring 7 is pressed against the step surface to seal the mounting opening 13. The gland 5 and the sealing ring 7 are both sleeved on the piston rod 2.

[0046] In this embodiment, Figures 1 to 16 As shown, two hinged ear plates 3 are fixedly connected to the cylinder body 1, and the two hinged ear plates 3 are located on both sides of the piston rod 2. The cylinder body 1 and the two hinged ear plates 3 are integrally formed. The hinged ear plates 3 are provided with mounting holes 18 and hinge holes 19, and the mounting holes 18 are connected to the bracket part 24 of the hinge through a connecting member, such as a locating pin or a locating bolt. The hinge hole 19 is hinged to the hinge part 25 of the hinge through a hinge shaft. The high-performance buffer can be directly assembled and used with the hinge part through the two hinged ear plates 3, and there is no need to add a shell part to install the buffer on the hinge, and the assembly process is simple.

[0047] Further, in this embodiment, if Figures 1 to 16 As shown, a back plate 4 is provided on the cylinder body 1 , and the back plate 4 is between two hinged ear plates 3 and is used to support the two hinged ear plates 3 , thereby increasing the supporting strength and guiding function of the two hinged ear plates 3 .

[0048] Further, in this embodiment, if Figures 1 to 16 As shown, plug-in blocks 22 are provided on both sides of the back plate 4, and plug-in grooves 20 are provided on the two hinged ear plates 3. The plug-in blocks 22 on both sides of the back plate 4 are respectively inserted into the plug-in grooves 20 of the two hinged ear plates 3, and the back plate 4 can be installed on the cylinder body 1 to support the two hinged ear plates 3.

[0049] Further, in this embodiment, if Figures 1 to 16 As shown, a positioning head 23 is provided on the plug-in block 22, and a positioning hole 21 is provided in the plug-in slot 20. The positioning hole 21 is located on the plug-in path of the positioning head 23. After the plug-in block 22 of the back panel 4 is inserted into the plug-in slot 20, the positioning head 23 will be stuck in the positioning hole 21, thereby improving the plug-in stability of the back panel 4 and the plug-in slot 20, and preventing the back panel 4 from detaching from the two hinged ear panels 3.

[0050] In this embodiment, Figures 1 to 16 As shown, the cylinder body 1 and the hinged ear plate 3 are an integrally formed plastic shell, and the pressure cover 5 is an elastic plastic cover plate.

[0051] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A high-performance buffer, comprising a cylinder body with a cylinder cavity, a piston assembly arranged in the cylinder cavity, and a piston rod connected to the piston assembly, wherein the piston rod extends out of one end of the cylinder cavity, and a buffer spring is arranged in the other end of the cylinder cavity to tighten the piston assembly, and the cylinder cavity is filled with damping oil, characterized in that: The piston assembly includes a buffer plate, a limit seat and an oil passing ring sleeved on the piston rod, the buffer plate and the limit seat are fixedly connected to the piston rod, the limit seat is in contact with the buffer spring, the oil passing ring is located between the buffer plate and the limit seat, and a moving spacing for the oil passing ring to move is provided between the buffer plate and the limit seat, the inner ring diameter of the oil passing ring is larger than the piston rod, the limit seat is provided with an oil passing port corresponding to the inner ring of the oil passing ring, the outer ring wall of the oil passing ring is divided into a sealing section and an oil passing section along the axis, the sealing section is sealed and fitted with the cylinder cavity, the oil passing section faces the buffer plate, the diameter of the oil passing section is smaller than the cylinder cavity, an oil passing groove is provided on the end surface of the oil passing section facing the buffer plate, a first oil port connected to one end of the oil passing groove is provided on the inner ring wall of the oil passing ring, a second oil port connected to the other end of the oil passing groove is provided on the oil passing section, and the diameter of the buffer plate is between the oil passing section and the cylinder cavity.

2. A high performance buffer according to claim 1, characterized in that: The oil passage channel is a semi-annular channel.

3. A high performance buffer according to claim 1, characterized in that: The cylinder body is a plastic body, and the diameter of the sealing section is larger than the diameter of the cylinder body.

4. A high performance buffer according to any one of claims 1 to 3, characterized in that: A pressure relief chamber coaxially arranged with the cylinder cavity is provided in the cylinder body, the diameter of the pressure relief chamber gradually increases, the small diameter end of the pressure relief chamber is connected with the end of the cylinder cavity away from the piston rod, the diameter of the small diameter end of the pressure relief chamber is the same as the diameter of the cylinder cavity, the pressure relief chamber has a pressure relief position from the small diameter end to the large diameter end, the diameter of the pressure relief position is larger than the sealing section of the oil ring, and the buffer spring is installed at the large diameter end of the pressure relief chamber.

5. A high performance buffer according to claim 4, characterized in that: The buffer spring is a tower spring, one end of which abuts against the end surface of the large diameter end of the pressure relief chamber, and the other end of which abuts against the limit seat.

6. A high performance buffer according to any one of claims 1 to 3, characterized in that: An installation opening is provided at one end of the cylinder cavity for the piston rod to extend out, and the diameter of the installation opening is larger than the cylinder cavity. A sealing ring and a pressure cover for pressing the sealing ring onto the installation opening are provided at the installation opening, and the sealing ring and the pressure cover are both sleeved on the piston rod.

7. A high performance buffer according to any one of claims 1 to 3, characterized in that: The cylinder body is provided with two hinged ear plates, which are located on both sides of the piston rod. The hinged ear plates are provided with mounting holes and hinged holes. The mounting holes are connected to the bracket part of the hinge through a connecting piece, and the hinged hole is hinged to the hinge part of the hinge through a hinge shaft.

8. A high performance buffer according to claim 7, characterized in that: The cylinder body is provided with a back plate supporting the two hinged ear plates.

9. A high performance buffer according to claim 8, characterized in that: Plug-in blocks are arranged on both sides of the hinged back plate, and plug-in grooves for the plug-in blocks to be plugged in are arranged on the hinged ear plates.

10. A high performance buffer according to claim 9, characterized in that: The plug-in block is provided with a positioning head, the plug-in slot is provided with a positioning hole, and the positioning hole is located on the plug-in path of the positioning head.

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