A buffer oil cylinder with high buffer performance and working method thereof

Abstract

The present invention relates to the technical field of buffer oil cylinders, and discloses a buffer oil cylinder with high buffer performance and a working method thereof, wherein a one-way valve is movably connected to a buffer plunger through a spring, and a rod chamber and a rodless chamber are respectively provided with two connecting chambers, one connecting chamber is connected to the one-way valve through a buffer hole, and the other connecting chamber is connected to the buffer plunger through a drainage hole. When the piston is about to move to the end of the rod chamber of a cylinder body, the hydraulic oil pushes the one-way valve to compress the spring, and closes the connection between the rod chamber and the buffer plunger, so that a closed space is formed between the piston and the cylinder body. Due to the incompressible property of the liquid, the pressure changes sharply, thereby achieving a buffer effect, which not only helps to avoid high-pressure shocks, but also allows the hydraulic system to operate more stably and efficiently while ensuring the buffer effect.

Description

Technical Field

[0001] The present invention relates to the technical field of buffer oil cylinders, and in particular to a buffer oil cylinder with high buffering performance and a working method thereof. Background Art

[0002] In the hydraulic system, the hydraulic cylinder is one of the essential hydraulic components. When the hydraulic cylinder moves at high speed to the end of the stroke, the piston cylinder will often have a violent mechanical collision when extending and retracting to the end, resulting in poor stability of the cylinder, which not only affects the working performance of the mechanical equipment, but also damages the hydraulic cylinder and other components of the hydraulic system. It is very dangerous and affects the service life of the hydraulic cylinder after a long time.

[0003] There are two solutions at present. One is to install two buffer sleeves on the cylinder bottom and the piston respectively, and use the gap between the two buffer sleeves to achieve the buffering effect. The disadvantage of this structure is that the oil does not flow smoothly when the piston is extended, and there is a throttling scene. A one-way valve structure must be added, which leads to a complex structure and a high failure rate. In addition, the traditional oil cylinder buffer needs to install buffer sleeves on the cylinder bottom and the piston respectively. There is a high coaxiality requirement between the cylinder bottom and the piston. Moreover, the cylinder bottom is purchased as a welded structure, and the coaxiality is difficult to guarantee.

[0004] In view of the structural characteristics of hydraulic cylinders, the industry has conducted relevant research and design, such as a cylinder buffer mechanism,

[0005] It includes a first part and a second part, the first part is located in the buffer cavity and slides with the buffer cavity, the second part extends backward beyond the rear side of the piston, the buffer sleeve is provided with a through hole that penetrates the buffer sleeve, the through hole is composed of a first hole, a second hole, and a third hole with decreasing diameters in sequence, the buffer sleeve is provided with a throttling hole that penetrates the buffer sleeve corresponding to the second hole, the second hole is provided with a valve core, the valve core is a cylinder, the front side of the valve core is sealed, and the rear side is open, the valve core and the second hole are slidably matched, the front side of the valve core is provided with a conical head that is sealed with the rear side of the second hole, the valve core is axially provided with a through hole that radially penetrates the inside and outside of the valve core, the spring is arranged in the buffer cavity, the front side of the spring is connected to the bottom of the buffer cavity, and the rear side of the spring is abutted against the rear side of the first hole.

[0006] However, since the hydraulic oil flowing into the equipment will enter the valve core through the first hole and the second hole in sequence, and then enter the cylinder through the through holes of the valve core and the buffer sleeve, when the piston extends and retracts too quickly, the high-flow hydraulic oil will impact the conical head with high pressure, which may cause the valve core to fail to open or close in a timely and appropriate manner, thereby posing a safety hazard. Summary of the invention

[0007] In order to solve the above-mentioned prior art problems, the present invention provides a buffer oil cylinder with high buffer performance;

[0008] Another object of the present invention is to provide a working method of a buffer cylinder with high buffer performance.

[0009] A buffer oil cylinder with high buffering performance, comprising a piston arranged in a cylinder body, the piston dividing the inner cavity of the cylinder body into a rod cavity and a rodless cavity, the rod cavity and the rodless cavity are connected to a hydraulic system through an oil supply port and a buffer assembly respectively;

[0010] The piston slides along the length of the cylinder body to separate the rod chamber into a first rod chamber and a second rod chamber, and to separate the rodless chamber into a first rodless chamber and a second rodless chamber;

[0011] The buffer assembly comprises a one-way valve, a spring and a buffer plunger, wherein the one-way valve is movably connected to the buffer plunger through the spring;

[0012] The cylinder body is also provided with a buffer chamber which is respectively connected with the rod chamber and the rodless chamber, and the buffer assembly is arranged in the buffer chamber; the first rod chamber and the second rod chamber are both connected with the buffer chamber, and the buffer chamber also includes a buffer hole and a drainage hole, the first rod chamber is connected with the one-way valve through the buffer hole, and the second rod chamber is connected with the buffer plunger through the drainage hole; the first rodless chamber and the second rodless chamber are both connected with another buffer chamber, the first rodless chamber is connected with the one-way valve through the buffer hole, and the second rodless chamber is connected with the buffer plunger through the drainage hole When the piston (1) moves toward the end of the rod chamber (2) or the rodless chamber (3) of the cylinder body, the hydraulic oil can flow toward the buffer plunger (503) through the drainage hole (402), and flow back to the hydraulic system through the buffer plunger (503); when the piston (1) is about to move to the end of the rod chamber (2) or the rodless chamber (3) of the cylinder body, the hydraulic oil flows toward the one-way valve (501) through the buffer hole (401), and the one-way valve (501) closes the connection between the drainage hole (402) and the buffer plunger (503). Furthermore, the cylinder body includes a cylinder bottom, a cylinder barrel and a guide sleeve, the cylinder bottom is detachably connected to the cylinder barrel, and the guide sleeve and the cylinder barrel are detachably connected;

[0013] The cylinder bottom is provided with an oil supply port connected to the rodless cavity and a buffer component, and the guide sleeve is provided with an oil supply port connected to the rod cavity and a buffer component.

[0014] Preferably, the cylinder bottom is detachably connected to the cylinder barrel via screws, and the guide sleeve is sleeved on the cylinder barrel via a nut.

[0015] Furthermore, the piston is detachably connected to a piston rod, which is disposed in the guide sleeve and can move along the length direction of the guide sleeve. The piston moves along both ends of the cylinder barrel to allow the hydraulic oil to flow toward the cylinder bottom and the buffer assembly of the guide sleeve.

[0016] Preferably, a dust ring, a U-shaped ring, a sealing ring and a supporting ring are provided between the piston rod and the cylinder body, and the dust ring, the U-shaped ring, the sealing ring and the supporting ring are sleeved on the outside of the piston rod.

[0017] Furthermore, the oil supply port is provided with a ferrule joint, and the ferrule joint is detachably provided with a sealing cover.

[0018] Furthermore, the oil supply port includes a first oil supply port and a second oil supply port, the first oil supply port is connected to the rod cavity, and the second oil supply port is connected to the rodless cavity.

[0019] Furthermore, an earring which is sleeved with other components is provided at the end of the cylinder body, and a grease nipple hole for lubricating the earring is also provided on the earring.

[0020] Furthermore, a Gly ring and a support ring are provided between the piston and the cylinder body, and the Gly ring and the support ring are sleeved on the outside of the piston.

[0021] A working method of a buffer oil cylinder, the working method of the buffer oil cylinder comprising the following steps:

[0022] S1: The hydraulic system injects hydraulic oil from the oil supply port, and the hydraulic oil enters the rodless chamber from the oil supply port. The hydraulic oil pushes the piston to move toward the end of the cylinder body with the rod chamber, and the hydraulic oil inside the rod chamber flows back to the hydraulic system through another oil supply port;

[0023] S2: When the piston moves toward the end of the rod chamber of the cylinder body, the hydraulic oil in the rod chamber can flow to the buffer plunger through the second rod chamber, and then flow back to the hydraulic system through the buffer plunger. The hydraulic oil of the hydraulic system also flows into the rodless chamber through the first rodless chamber and the second rodless chamber;

[0024] S3: When the piston is about to move to the end of the rod chamber of the cylinder body, the hydraulic oil inside the rod flows through the first rod chamber to the one-way valve, and just pushes the one-way valve compression spring to close the connection between the second rod chamber and the buffer plunger, so that a closed space is formed between the piston and the cylinder body. Due to the incompressible characteristics of the liquid, the pressure changes sharply, thereby achieving a buffering effect;

[0025] S4: Then the hydraulic system injects hydraulic oil from another oil supply port, and the hydraulic oil enters the rod chamber from the oil supply port. The hydraulic oil pushes the piston to move toward the end of the rodless chamber of the cylinder body, and the hydraulic oil inside the rodless chamber flows back to the hydraulic system through another oil supply port;

[0026] S5: When the piston moves toward the rodless chamber end of the cylinder body, the hydraulic oil in the rodless chamber can flow to the buffer plunger through the second rodless chamber, and then flow back to the hydraulic system through the buffer plunger. The hydraulic oil of the hydraulic system also flows into the rod chamber through the first rod chamber and the second rod chamber;

[0027] S6: When the piston is about to move to the end of the rodless chamber of the cylinder body, the hydraulic oil inside the rodless chamber flows to the one-way valve through the first rodless chamber, and just pushes the one-way valve compression spring to close the connection between the second rodless chamber and the buffer plunger, so that a closed space is formed between the piston and the cylinder body. Due to the incompressible characteristics of the liquid, the pressure changes sharply, thereby achieving a buffering effect;

[0028] S7: Hydraulic oil is injected into the rod chamber and rodless chamber of the cylinder body through intermittent circulation to realize the extension and retraction of the piston.

[0029] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0030] ① Buffer components are provided in the rod chamber and rodless chamber in the cylinder body respectively to prevent the piston and cylinder from violent collision due to inertia; and each is connected to the hydraulic system through a specific path, which can control the buffering of high-speed hydraulic oil in the two chambers, so as to more finely control the buffering characteristics of the piston at the end of the stroke at both ends, thereby protecting the piston with rapid movement or large load changes.

[0031] ② The one-way valve is movably connected to the buffer plunger through a spring, and the rod chamber and the rodless chamber are respectively provided with two connecting chambers, one connecting chamber is connected to the one-way valve through the buffer hole, and the other connecting chamber is connected to the buffer plunger through the drainage hole. When the piston is about to move to the end of the rod chamber of the cylinder body, the hydraulic oil pushes the one-way valve to compress the spring, and the connection between the rod chamber and the buffer plunger is closed, so that a closed space is formed between the piston and the cylinder body. Due to the incompressible characteristics of the liquid, the pressure changes sharply, thereby achieving a buffering effect. This not only helps to avoid high-pressure shocks, but also allows the hydraulic system to operate more stably and efficiently while ensuring the buffering effect.

[0032] ③ The inlet end of the one-way valve is coaxially arranged with the buffer plunger and connected with the drainage hole, and the outlet end of the one-way valve is connected with the buffer hole. When hydraulic oil needs to be injected into the cylinder through the buffer chamber, it can be injected into the cylinder through the buffer plunger and the one-way valve. When the cylinder needs to discharge hydraulic oil through the buffer chamber, the one-way valve can be used to compress the spring and close the connection between the second rod chamber and the buffer plunger to form a closed space between the piston and the cylinder. Due to the incompressible characteristics of the liquid, the pressure changes sharply, thereby achieving the effect of buffer discharge and avoiding the piston and cylinder barrel from having a violent collision due to inertia.

[0033] ④ An earring is provided at the end of the hydraulic cylinder to connect with other parts to maintain a stable connection posture;

[0034] An earring is provided at the end of the cylinder barrel for connecting with other parts. The earring can be used to connect with other mechanical parts (such as fixed brackets, connecting rods, etc.), which increases the stability and reliability of the connection and ensures that the hydraulic cylinder maintains an accurate position and posture when subjected to tension, compression or lateral force during operation to avoid loosening or falling off.

[0035] ⑤ There is also a grease nipple hole at the end of the hydraulic cylinder, through which the earrings and connected parts can be lubricated. Since the earring connection parts may be subjected to greater friction during the operation of the hydraulic cylinder, regular lubrication can reduce wear and extend service life. The design of the grease nipple hole enables maintenance personnel to directly perform fixed-point lubrication on key moving parts, thereby improving maintenance efficiency and system durability.

[0036] ⑥ Connecting the buffer chamber to the main hydraulic system through a hydraulic circuit can ensure that the pressure inside and outside the cylinder is balanced and effectively controlled during the buffering process. The advantage of this is that the pressure regulation mechanism of the entire hydraulic system can be used to finely manage the buffering process and avoid potential risks caused by excessive local pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 is a first structural schematic diagram of a buffer oil cylinder with high buffer performance;

[0039] Figure 2 is a second structural schematic diagram of a buffer oil cylinder with high buffer performance;

[0040] Figure 3 is an enlarged schematic diagram of A;

[0041] Figure 4 is an enlarged schematic diagram of B;

[0042] Figure 5 It is a schematic diagram of the structure of the one-way valve moving downward;

[0043] Figure 6 It is the cross-section view in the AA direction;

[0044] Figure 7 It is an overall schematic diagram of a buffer cylinder with high buffer performance;

[0045] Figure 8 It is a structural diagram of a one-way valve.

[0046] The reference numerals are as follows:

[0047] 1. Piston;

[0048] 2. rod cavity; 201. first rod cavity; 202. second rod cavity;

[0049] 3. rodless cavity; 301. first rodless cavity; 302. second rodless cavity;

[0050] 4. Buffer cavity; 401. Buffer hole; 402. Drainage hole;

[0051] 5. Buffer assembly; 501. One-way valve; 502. Spring; 503. Buffer plunger;

[0052] 6. Bottom of the tank;

[0053] 7. Cylinder barrel;

[0054] 8. Guide sleeve;

[0055] 9. Piston rod;

[0056] 10. Ferrule connector;

[0057] 11. Sealing cover;

[0058] 12. First fuel supply port;

[0059] 13. Second fuel supply port;

[0060] 14. Earrings;

[0061] 15. Grease nipple hole. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be clearly and completely described below in conjunction with the drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0063] Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. "First", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. Example 1

[0064] like Figure 1-8 As shown, this embodiment discloses a buffer oil cylinder with high buffering performance, comprising a piston 1 arranged in a cylinder body, the piston 1 divides the inner cavity of the cylinder body into a rod cavity 2 and a rodless cavity 3, the rod cavity 2 and the rodless cavity 3 are connected to the hydraulic system through an oil supply port and a buffer assembly 5 respectively;

[0065] The piston 1 slides along the length of the cylinder body to separate the rod chamber 2 into a first rod chamber 201 and a second rod chamber 202, and to separate the rodless chamber 3 into a first rodless chamber 301 and a second rodless chamber 302;

[0066] The buffer assembly 5 includes a one-way valve 501, a spring 502 and a buffer plunger 503. The one-way valve 501 is movably connected to the buffer plunger 503 through the spring 502.

[0067] The cylinder body is further provided with a buffer chamber 4 which is communicated with the rod chamber 2 and the rodless chamber 3 respectively, and a buffer assembly 5 is arranged in the buffer chamber 4 .

[0068] When working, the hydraulic system injects hydraulic oil from the oil supply port, and the hydraulic oil enters the rodless chamber 3 from the oil supply port. The hydraulic oil pushes the piston 1 to move toward the end of the cylinder body with the rod chamber 2, and the hydraulic oil inside the rod chamber 2 flows back to the hydraulic system through another oil supply port;

[0069] When the piston 1 moves toward the end of the rod chamber 2 of the cylinder body, the hydraulic oil in the rod chamber 2 can flow to the buffer plunger 503 through the second rod chamber 202, and then flow back to the hydraulic system through the buffer plunger 503. The hydraulic oil of the hydraulic system also flows into the rodless chamber 3 through the first rodless chamber 301 and the second rodless chamber 302.

[0070] When the piston 1 is about to move to the end of the rod chamber 2 of the cylinder body, the hydraulic oil inside the rod chamber 2 flows to the one-way valve 501 through the first rod chamber 201, and just pushes the one-way valve 501 to compress the spring 502, closing the connection between the second rod chamber 202 and the buffer plunger 503, so that a closed space is formed between the piston 1 and the cylinder body. Due to the incompressible nature of the liquid, the pressure changes sharply, thereby achieving a buffering effect; hydraulic oil is injected into the rod chamber 2 and the rodless chamber 3 of the cylinder body through intermittent circulation to realize the extension and retraction of the piston 1.

[0071] Specifically, buffer assemblies 5 are provided in the rod chamber 2 and the rodless chamber 3 in the cylinder body respectively to prevent the piston 1 and the cylinder body from violent collision due to inertia; and each is connected to the hydraulic system through a specific path, so as to control the buffering of the high-speed hydraulic oil in the two chambers, thereby more finely controlling the buffering characteristics of the piston 1 at the end of the stroke at both ends, thereby protecting the piston with rapid movement or large load changes.

[0072] As a specific implementation, the first rod chamber 201 and the second rod chamber 202 are both connected to the buffer chamber 4, and the buffer chamber 4 further includes a buffer hole 401 and a drainage hole 402. The first rod chamber 201 is connected to the one-way valve 501 through the buffer hole 401, and the second rod chamber 202 is connected to the buffer plunger 503 through the drainage hole 402.

[0073] The first rodless chamber 301 and the second rodless chamber 302 are both connected to another buffer chamber 4, the first rodless chamber 301 is connected to the one-way valve 501 through the buffer hole 401, and the second rodless chamber 302 is connected to the buffer plunger 503 through the drainage hole 402; when the piston 1 moves toward the end of the rod chamber 2 or the rodless chamber 3 of the cylinder body, the hydraulic oil can flow to the buffer assembly 5 through the drainage hole 402; when the piston 1 moves to the end of the rod chamber 2 or the rodless chamber 3 of the cylinder body, the hydraulic oil flows to the buffer assembly 5 through the buffer hole 401, and the one-way valve 501 closes the connection between the second rod chamber 202 and the buffer plunger 503.

[0074] Specifically, the one-way valve 501 is movably connected to the buffer plunger 503 through a spring 502, and the rod chamber 2 and the rodless chamber 3 are respectively provided with two connecting chambers, one connecting chamber is connected to the one-way valve 501 through the buffer hole 401, and the other connecting chamber is connected to the buffer plunger 503 through the drainage hole 402. When the piston 1 is about to move to the end of the rod chamber 2 of the cylinder body, the hydraulic oil pushes the one-way valve 501 to compress the spring 502, and the connection between the rod chamber 2 and the buffer plunger 503 is closed, so that a closed space is formed between the piston 1 and the end of the cylinder body. The incompressible property of the liquid causes a sharp change in pressure, thereby achieving a buffering effect. This not only helps to avoid high-pressure shocks, but also allows the hydraulic system to operate more stably and efficiently while ensuring the buffering effect.

[0075] Specifically, connecting the buffer chamber 4 to the main hydraulic system through a hydraulic circuit can ensure that the pressure inside and outside the cylinder is balanced and effectively controlled during the buffering process. The advantage of this is that the pressure regulation mechanism of the entire hydraulic system can be utilized to finely manage the buffering process and avoid potential risks caused by excessive local pressure.

[0076] As a specific implementation manner, a ferrule joint 10 is provided on the oil supply port, and the ferrule joint 10 is detachably provided with a sealing cover 11 .

[0077] Specifically, the sealing cover 11 is provided to protect the inside of the cylinder from contamination and prevent hydraulic oil leakage when the joint is not connected to the pipeline. Especially during transportation, storage or maintenance, the sealing cover 11 can effectively isolate external impurities from entering the oil circuit system and keep the oil clean, which is crucial for the long-term stable operation of the hydraulic system.

[0078] As a specific implementation, the oil supply port includes a first oil supply port 12 and a second oil supply port 13 . The first oil supply port 12 is connected to the rod cavity 2 , and the second oil supply port 13 is connected to the rodless cavity 3 .

[0079] Specifically, by directly supplying oil to the rod chamber 2 through the first oil supply port 12 and supplying oil to the rodless chamber 3 through the second oil supply port 13, the pressure and flow of the two chambers can be controlled separately, which is particularly important for applications that require precise control of piston speed and force.

[0080] Specifically, the inlet end of the one-way valve 501 is coaxially arranged with the buffer plunger 503 and connected to the drainage hole 402, and the outlet end of the one-way valve 501 is connected to the buffer hole 401. When it is necessary to inject hydraulic oil into the cylinder body through the buffer chamber 4, it can be injected into the cylinder body through the buffer plunger 503 and the one-way valve 501. When the cylinder body needs to discharge hydraulic oil through the buffer chamber 4, the spring 502 can be compressed through the one-way valve 501 to close the connection between the rod chamber 3 and the buffer plunger 503, so that a closed space is formed between the piston 1 and the cylinder body. Due to the incompressible nature of the liquid, the pressure changes sharply, thereby achieving the effect of buffer discharge, avoiding the piston 1 and the cylinder 7 from being violently hit due to inertia.

[0081] As a specific implementation, an earring 14 for sleeve connection with other components is provided at the end of the cylinder body, and a grease nipple hole 15 for lubricating the earring 14 is also provided on the earring 14 .

[0082] Specifically, an earring 14 for socketing with other components is provided at the end of the cylinder 7, and the earring 14 can be used to socket with other mechanical components (such as a fixed bracket, a connecting rod, etc.), thereby increasing the stability and reliability of the connection, and ensuring that the hydraulic cylinder maintains an accurate position and posture when subjected to tension, compression or lateral force during operation, and avoids loosening or falling off.

[0083] Specifically, a grease nipple hole 15 is provided at the end of the hydraulic cylinder, through which the earring 14 and the connected parts can be lubricated. Since the connection part of the earring 14 may be subjected to greater friction during the operation of the hydraulic cylinder, regular lubrication can reduce wear and extend the service life. The design of the grease nipple hole 15 enables maintenance personnel to directly perform fixed-point lubrication on key moving parts, thereby improving maintenance efficiency and system durability.

[0084] As a specific implementation, a Gly ring and a support ring are provided between the piston 1 and the cylinder body, and the Gly ring and the support ring are sleeved on the outside of the piston 1 .

[0085] Specifically, the Gly ring is a high-performance sealing element, which consists of two parts, usually a sealing ring and a support ring, which is designed to prevent the hydraulic oil from leaking from the gap between the piston 1 and the cylinder body, so as not to leak into the low-pressure chamber or the external environment, and maintain the pressure stability and efficiency of the system; the support ring plays a supporting and guiding role, which can reduce the friction generated by the direct contact between the piston 1 and the cylinder wall during reciprocating motion, and extend the service life of the piston 1 and the inner wall of the cylinder 7. The support ring bears most of the lateral force, reducing the wear of the sealing ring while keeping the piston moving smoothly.

[0086] Specifically, a dust ring, a U-shaped ring, a sealing ring and a supporting ring are provided between the piston rod 9 and the cylinder body, and the dust ring, the U-shaped ring, the sealing ring and the supporting ring are sleeved on the outside of the piston rod 9 .

[0087] Specifically, the dust ring is located at the outermost layer, and its main function is to prevent external dust, dirt and moisture from entering the hydraulic system, protect the internal seals from damage, and thus extend the service life of the hydraulic cylinder;

[0088] The U-shaped ring prevents the hydraulic oil from leaking from the tiny gap between the piston rod 9 and the cylinder body. The U-shaped ring deforms elastically and adheres to the sealing surface when squeezed, forming an effective sealing barrier.

[0089] The sealing ring can adapt to the reciprocating motion of the piston rod 9 while maintaining a good sealing effect to prevent leakage of high-pressure liquid and effectively resist the impact caused by pressure and speed changes;

[0090] The support ring is located on one side close to the center of the piston rod 9. Its main function is to support the piston rod 9, reduce its direct friction with the cylinder wall, disperse the lateral force, and protect the sealing ring from unnecessary wear. Example 2

[0091] like Figure 1-8As shown, this embodiment discloses a buffer oil cylinder with high buffering performance, comprising a piston 1 arranged in a cylinder body, the piston 1 divides the inner cavity of the cylinder body into a rod cavity 2 and a rodless cavity 3, the rod cavity 2 and the rodless cavity 3 are connected to the hydraulic system through an oil supply port and a buffer assembly 5 respectively;

[0092] The piston 1 slides along the length of the cylinder body to separate the rod chamber 2 into a first rod chamber 201 and a second rod chamber 202, and to separate the rodless chamber 3 into a first rodless chamber 301 and a second rodless chamber 302;

[0093] The buffer assembly 5 includes a one-way valve 501, a spring 502 and a buffer plunger 503. The one-way valve 501 is movably connected to the buffer plunger 503 through the spring 502.

[0094] The cylinder body is further provided with a buffer chamber 4 which is communicated with the rod chamber 2 and the rodless chamber 3 respectively, and a buffer assembly 5 is arranged in the buffer chamber 4 .

[0095] As a specific implementation, the cylinder body includes a cylinder bottom 6, a cylinder barrel 7 and a guide sleeve 8, the cylinder bottom 6 is detachably connected to the cylinder barrel 7, and the guide sleeve 8 and the cylinder barrel 7 are detachably connected;

[0096] The cylinder bottom 6 is provided with an oil supply port and a buffer assembly 5 connected to the rodless chamber 3, and the guide sleeve 8 is provided with an oil supply port and a buffer assembly 5 connected to the rod chamber 2;

[0097] The piston 1 is also detachably connected to a piston rod 9, which is disposed in a guide sleeve 8 and can move along the length direction of the guide sleeve 8. The piston 1 moves along both ends of the cylinder barrel 7 to allow the hydraulic oil to flow toward the cylinder bottom 6 and the buffer assembly 5 of the guide sleeve 8.

[0098] Specifically, the cylinder bottom is detachably connected to the cylinder barrel 7 via screws, and the guide sleeve is sleeved on the cylinder barrel 7 via a nut.

[0099] Specifically, the cylinder body is composed of a cylinder bottom 6, a cylinder barrel 7 and a guide sleeve 8, and each part is detachably connected to facilitate assembly, disassembly and maintenance. This design allows the problem parts to be dealt with specifically when repair or replacement of parts is required, without replacing the entire cylinder, greatly reducing maintenance costs and downtime;

[0100] The piston rod 9 is detachably connected to the piston 1 and slides in the guide sleeve 8. This design ensures that the piston rod 9 maintains straightness and stability during reciprocating motion, reducing wear. In addition to providing a guiding function, the guide sleeve also protects the piston rod 9 from direct wear on the inner wall of the cylinder 7, thereby increasing the durability of the system.

[0101] When the piston 1 moves along the two ends of the cylinder barrel 7, the hydraulic oil flows to the cylinder bottom 6 and the buffer assembly 5 of the guide sleeve 8. Such a flow path design helps to optimize the oil flow path, improve the energy conversion efficiency, and ensure the efficient operation of the hydraulic system. Example 3

[0102] like Figure 1-8 As shown, this embodiment discloses a working method of a buffer oil cylinder with high buffering performance, and the working method of the buffer oil cylinder includes the following:

[0103] S1: The hydraulic system injects hydraulic oil from the oil supply port, and the hydraulic oil enters the rodless chamber 3 from the oil supply port. The hydraulic oil pushes the piston 1 to move toward the end of the cylinder body with the rod chamber 2, and the hydraulic oil inside the rod chamber 2 flows back to the hydraulic system through another oil supply port;

[0104] S2: When the piston 1 moves toward the end of the rod chamber 2 of the cylinder body, the hydraulic oil inside the rod chamber 2 can flow to the buffer plunger 503 through the second rod chamber 202, and then flow back to the hydraulic system through the buffer plunger 503. The hydraulic oil of the hydraulic system also flows into the rodless chamber 3 through the first rodless chamber 301 and the second rodless chamber 302;

[0105] S3: When the piston 1 is about to move to the end of the rod chamber 2 of the cylinder body, the hydraulic oil in the rod chamber 2 flows through the first rod chamber 201 to the one-way valve 501, and just pushes the one-way valve 501 to compress the spring 502, closing the connection between the second rod chamber 202 and the buffer plunger 503, so that a closed space is formed between the piston 1 and the cylinder body. Due to the incompressible property of the liquid, the pressure changes sharply, thereby achieving a buffering effect;

[0106] S4: Then the hydraulic system injects hydraulic oil from another oil supply port, and the hydraulic oil enters the rod chamber 2 from the oil supply port, and the hydraulic oil pushes the piston 1 to move toward the end of the rodless chamber 3 of the cylinder body, and the hydraulic oil inside the rodless chamber 3 flows back to the hydraulic system through another oil supply port;

[0107] S5: When the piston 1 moves toward the end of the rodless chamber 3 of the cylinder body, the hydraulic oil inside the rodless chamber 3 can flow to the buffer plunger 503 through the second rodless chamber 302, and then flow back to the hydraulic system through the buffer plunger 503. The hydraulic oil of the hydraulic system also flows into the rod chamber 2 through the first rod chamber 201 and the second rod chamber 202;

[0108] S6: When the piston 1 is about to move to the end of the rodless chamber 3 of the cylinder body, the hydraulic oil in the rodless chamber 3 flows to the one-way valve 501 through the first rodless chamber 301, and just pushes the one-way valve 501 to compress the spring 502, closing the connection between the second rodless chamber 302 and the buffer plunger 503, so that a closed space is formed between the piston 1 and the cylinder body. Due to the incompressible property of the liquid, the pressure changes sharply, thereby achieving a buffering effect;

[0109] S7: Hydraulic oil is injected into the rod chamber 2 and the rodless chamber 3 of the cylinder body through intermittent circulation to realize the extension and retraction of the piston 1.

[0110] Specifically, buffer assemblies 5 are provided in the rod chamber 2 and the rodless chamber 3 in the cylinder body respectively to prevent the piston 1 and the cylinder body from violent collision due to inertia; and each is connected to the hydraulic system through a specific path, so as to control the buffering of the high-speed hydraulic oil in the two chambers, thereby more finely controlling the buffering characteristics of the piston 1 at the end of the stroke at both ends, thereby protecting the piston with rapid movement or large load changes.

[0111] How it works

[0112] When working, the hydraulic system injects hydraulic oil from the oil supply port, and the hydraulic oil enters the rodless chamber (3) from the oil supply port. The hydraulic oil pushes the piston 1 to move toward the end of the cylinder body in the direction of the rod chamber 2, and the hydraulic oil in the rod chamber 2 flows back to the hydraulic system through another oil supply port.

[0113] When the piston 1 moves toward the end of the rod chamber 2 of the cylinder body, the hydraulic oil in the rod chamber 2 can flow to the buffer plunger 503 through the second rod chamber 202, and then flow back to the hydraulic system through the buffer plunger 503. The hydraulic oil of the hydraulic system also flows into the rodless chamber 3 through the first rodless chamber 301 and the second rodless chamber 302.

[0114] When the piston 1 is about to move to the end of the rod chamber 2 of the cylinder body, the hydraulic oil inside the rod chamber 2 flows to the one-way valve 501 through the first rod chamber 201, and just pushes the one-way valve 501 to compress the spring 502, closing the connection between the second rod chamber 202 and the buffer plunger 503, so that a closed space is formed between the piston 1 and the cylinder body. Due to the incompressible nature of the liquid, the pressure changes sharply, thereby achieving a buffering effect; hydraulic oil is injected into the rod chamber 2 and the rodless chamber 3 of the cylinder body through intermittent circulation to realize the extension and retraction of the piston 1.

[0115] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A buffer oil cylinder with high buffer performance, characterized in that: It comprises a piston (1) arranged in a cylinder body, the piston (1) dividing the inner cavity of the cylinder body into a rod cavity (2) and a rodless cavity (3), the rod cavity (2) and the rodless cavity (3) being connected to a hydraulic system via an oil supply port and a buffer assembly (5); The piston (1) slides along the length of the cylinder body to separate the rod chamber (2) into a first rod chamber (201) and a second rod chamber (202), and to separate the rodless chamber (3) into a first rodless chamber (301) and a second rodless chamber (302); The buffer assembly (5) comprises a one-way valve (501), a spring (502) and a buffer plunger (503); the one-way valve (501) is movably connected to the buffer plunger (503) via the spring (502); The cylinder body is further provided with a buffer chamber (4) which is respectively connected to the rod chamber (2) and the rodless chamber (3); the buffer assembly (5) is arranged in the buffer chamber (4); the first rod chamber (201) and the second rod chamber (202) are both connected to the buffer chamber (4); the buffer chamber (4) further comprises a buffer hole (401) and a drainage hole (402); the first rod chamber (201) is connected to the one-way valve (501) through the buffer hole (401), and the second rod chamber (202) is connected to the buffer plunger (503) through the drainage hole (402); The first rodless chamber (301) and the second rodless chamber (302) are both connected to another buffer chamber (4); the first rodless chamber (301) is connected to a one-way valve (501) via a buffer hole (401), and the second rodless chamber (302) is connected to a buffer plunger (503) via a drainage hole (402); When the piston (1) moves toward the end of the rod chamber (2) or the rodless chamber (3) of the cylinder body, the hydraulic oil can flow toward the buffer plunger (503) through the drainage hole (402) and flow back to the hydraulic system through the buffer plunger (503); when the piston (1) is about to move to the end of the rod chamber (2) or the rodless chamber (3) of the cylinder body, the hydraulic oil flows toward the one-way valve (501) through the buffer hole (401), and the one-way valve (501) closes the connection between the drainage hole (402) and the buffer plunger (503).

2. The buffer oil cylinder with high buffering performance according to claim 1, characterized in that: The cylinder body comprises a cylinder bottom (6), a cylinder barrel (7) and a guide sleeve (8); the cylinder bottom (6) is detachably connected to the cylinder barrel (7), and the guide sleeve (8) and the cylinder barrel (7) are detachably connected; The cylinder bottom (6) is provided with an oil supply port communicating with the rodless chamber (3) and a buffer assembly (5), and the guide sleeve (8) is provided with an oil supply port communicating with the rod chamber (2) and a buffer assembly (5).

3. The buffer oil cylinder with high buffering performance according to claim 2, characterized in that: The piston (1) is also detachably connected to a piston rod (9), the piston rod (9) being disposed in a guide sleeve (8) and being movable along the length direction of the guide sleeve (8), and the piston (1) being movable along both ends of the cylinder barrel (7) so that the hydraulic oil flows toward the cylinder bottom (6) and the buffer assembly (5) of the guide sleeve (8).

4. The buffer oil cylinder with high buffering performance according to claim 1, characterized in that: The oil supply port is provided with a ferrule joint (10), and the ferrule joint (10) is detachably provided with a sealing cover (11).

5. The buffer oil cylinder with high buffering performance according to claim 1, characterized in that: The oil supply port comprises a first oil supply port (12) and a second oil supply port (13); the first oil supply port (12) is connected to the rod chamber (2), and the second oil supply port (13) is connected to the rodless chamber (3).

6. The buffer oil cylinder with high buffering performance according to claim 1, characterized in that: An earring (14) sleeved with other components is provided at the end of the cylinder body, and a grease nipple hole (15) for lubricating the earring (14) is also provided on the earring (14).

7. The buffer oil cylinder with high buffering performance according to claim 1, characterized in that: A Gly ring and a support ring are provided between the piston (1) and the cylinder body, and the Gly ring and the support ring are sleeved on the outside of the piston (1).

8. A working method using the buffer cylinder according to any one of claims 1 to 7, characterized in that: The working method of the buffer cylinder includes the following: S1: The hydraulic system injects hydraulic oil from the oil supply port, and the hydraulic oil enters the rodless chamber (3) from the oil supply port. The hydraulic oil pushes the piston (1) to move toward the end of the cylinder body in the direction of the rod chamber (2). The hydraulic oil in the rod chamber (2) flows back to the hydraulic system through another oil supply port; S2: When the piston (1) moves toward the end of the rod chamber (2) of the cylinder body, the hydraulic oil in the rod chamber (2) can flow toward the buffer plunger (503) through the second rod chamber (202), and then flow back to the hydraulic system through the buffer plunger (503). The hydraulic oil of the hydraulic system also flows into the rodless chamber (3) through the first rodless chamber (301) and the second rodless chamber (302); S3: When the piston (1) is about to move to the end of the rod chamber (2) of the cylinder body, the hydraulic oil in the rod chamber (2) flows through the first rod chamber (201) to the one-way valve (501), and just pushes the one-way valve (501) to compress the spring (502), closing the connection between the second rod chamber (202) and the buffer plunger (503), so that a closed space is formed between the piston (1) and the cylinder body. Due to the incompressible property of the liquid, the pressure changes sharply, thereby achieving a buffering effect; S4: The hydraulic system then injects hydraulic oil from another oil supply port, and the hydraulic oil enters the rod chamber (2) from the oil supply port. The hydraulic oil pushes the piston (1) to move toward the end of the rodless chamber (3) of the cylinder body, and the hydraulic oil in the rodless chamber (3) flows back to the hydraulic system through another oil supply port; S5: When the piston (1) moves toward the end of the rodless chamber (3) of the cylinder body, the hydraulic oil in the rodless chamber (3) can flow toward the buffer plunger (503) through the second rodless chamber (302), and then flow back to the hydraulic system through the buffer plunger (503). The hydraulic oil of the hydraulic system also flows into the rod chamber (2) through the first rod chamber (201) and the second rod chamber (202); S6: When the piston (1) is about to move to the end of the rodless chamber (3) of the cylinder body, the hydraulic oil in the rodless chamber (3) flows through the first rodless chamber (301) to the one-way valve (501), and just pushes the one-way valve (501) to compress the spring (502), closing the connection between the second rodless chamber (302) and the buffer plunger (503), so that a closed space is formed between the piston (1) and the cylinder body. Due to the incompressible property of the liquid, the pressure changes sharply, thereby achieving a buffering effect; S7: Hydraulic oil is injected into the rod chamber (2) and rodless chamber (3) of the cylinder body through intermittent circulation to achieve the extension and retraction of the piston (1).

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