Hydraulic cylinder with damping and buffering functions

Abstract

The invention relates to the technical field of damping and buffering, and discloses a hydraulic cylinder with damping and buffering functions, which comprises a cylinder barrel, a first end cover is fixedly clamped to the left side of the cylinder barrel, a buffering mechanism is slidably connected to the left side of the first end cover, and a second end cover is fixedly clamped to the right side of the cylinder barrel. A piston centering mechanism is fixedly connected to the right side of the second end cover, a hydraulic force increasing mechanism is fixedly connected to the outer surface of the first end cover, a first piston is slidably connected to the inner surface of the cylinder barrel, a first sealing ring is clamped to the outer surface of the first piston, and a piston rod is fixedly connected to the right side of the first piston. The position of the piston can be automatically adjusted, the piston can be well matched with the cylinder barrel, friction and vibration are reduced, hydraulic oil can flow between the piston and the cylinder barrel more smoothly, the working efficiency and stability of the hydraulic cylinder are improved, and the piston centering mechanism can absorb and buffer influences caused by external impact and load changes and protect the hydraulic cylinder.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorption and buffering, in particular to a hydraulic cylinder with shock absorption and buffering functions. Background Art

[0002] A hydraulic cylinder is a device that uses liquid pressure energy to transmit and convert energy. It is a common hydraulic component. The hydraulic cylinder consists of a cylinder body, piston, seals and pipelines. The movement of the piston is driven by the pressure of the liquid. The function of the hydraulic cylinder is to convert the pressure energy of the liquid into mechanical energy, generating force and motion. Hydraulic cylinders are widely used in various industrial and engineering fields, such as cranes, excavators, truck cranes, conveyors, hydraulic supports, etc.

[0003] Existing hydraulic cylinders have defects. The function of a hydraulic cylinder is to provide outward supporting force. If there is no shock absorption and buffering assistance in this process, the hydraulic cylinder may encounter an impact load when it is at the end position, and the piston may suddenly stop or change the direction of movement, causing the impact force to react to the hydraulic cylinder and the connected equipment; and the gap between the piston and the cylinder barrel is too large or too small, which will cause vibration. When the gap is too large, the piston will produce deflection during movement, resulting in increased leakage of hydraulic oil, and at the same time, it will also increase the impact force between the piston and the cylinder barrel, causing vibration. If the gap is too small, friction resistance is likely to be generated, causing the piston to move unsmoothly, which may also cause vibration; finally, when the load borne by the hydraulic cylinder changes suddenly, such as the shaking of heavy objects during the crane lifting process, the change of punching force during the punching process of the punching machine, etc., the working pressure and speed of the hydraulic cylinder will change suddenly, causing vibration; This will cause wear and damage to mechanical parts, reduce the life of the equipment, and cause vibration and noise in the mechanical system, which will have adverse effects on the equipment and operators, including equipment damage and reduced accuracy. In addition, impact vibration will affect the stability of working accuracy. If the hydraulic cylinder does not have a shock absorber, the impact at the end position will lead to inaccurate positioning, swinging and other problems. Summary of the Invention

[0004] The object of the present invention is to provide a hydraulic cylinder with shock absorbing and buffering functions to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a hydraulic cylinder with shock-absorbing and buffering functions, comprising a cylinder barrel, a first end cover fixedly connected to the left side of the cylinder barrel, a buffer mechanism slidably connected to the left side of the first end cover, a second end cover fixedly connected to the right side of the cylinder barrel, a piston centering mechanism fixedly connected to the right side of the second end cover, a hydraulic boosting mechanism fixedly connected to the outer surface of the first end cover, a first piston slidably connected to the inner surface of the cylinder barrel, a first sealing ring clamped to the outer surface of the first piston, and a piston rod fixedly connected to the right side of the first piston.

[0006] According to the above technical solution, the hydraulic booster mechanism includes a first connecting block, which is fixedly connected to the outer surface of the first end cap. A first butterfly spring group is fixedly connected to the outer surface of the first connecting block. The top of the first butterfly spring group is fixedly connected to a notched cylinder. A first clamping block is clamped to the interior of the notched cylinder via a clamping slot. The top of the first clamping block is fixedly connected to a first hydraulic pump. A second clamping block is fixedly connected to the outer surface of the first hydraulic pump. The output end of the first hydraulic pump is fixedly connected to a first cross plate. The first cross plate is fixedly connected to the top of the piston rod. A first circular column is fixedly connected to the interior of the notched cylinder. A first clamping sleeve is clamped to the first circular column via a through hole. A first spring is provided on the outer surface of the first circular column. The upper end of the first spring is fixedly connected to the inner surface of the notched cylinder. A second circular column is fixedly connected to the interior of the notched cylinder. The first clamping sleeve is clamped to the second circular column via a through hole. A second spring is provided on the second circular column. The lower end of the second spring is fixedly connected to the inner surface of the notched cylinder.

[0007] According to the above technical solution, the buffer mechanism includes a second transverse plate, the bottom of the second transverse plate is fixedly connected to the second connecting block, the bottom of the second connecting block is fixedly connected to the third transverse plate, the interior of the second transverse plate is fixedly connected to the third circular column by opening a through hole, the outer surface of the third circular column is fixedly clamped with a rubber sleeve, the bottom of the third circular column is fixedly connected to the second piston, the outer surface of the second piston is clamped with a second sealing ring and a rubber ring by opening a clamping groove, the bottom of the second piston is fixedly connected to a guide sleeve, the bottom of the third transverse plate is fixedly connected to the second butterfly spring group, and the bottom of the second butterfly spring group is fixedly connected to the outer surface of the first end cover.

[0008] The cam is fixedly provided with a third clamping block, and the cam is fixedly provided with a third clamping block. The rotating rod is rotatably connected to the first rotating shaft, the outer surface of the second rotating shaft is rotatably connected to the second rotating rod, the second rotating rod is rotatably connected to the middle part through a through hole, the outer surface of the limiting rotating shaft is fixedly connected to the limiting connecting block, the outer surface of the limiting rotating shaft is rotatably connected to the first rotating rod, the right side of the first rotating rod is rotatably connected to the third rotating shaft through a through hole, the right side of the second rotating rod is rotatably connected to the fourth rotating shaft through an air hole, the outer surface of the fourth rotating shaft and the outer surface of the third rotating shaft are clamped with a limiting block through a slot, the right side of the limiting block is fixedly connected to the second hydraulic pump, the right side of the second hydraulic pump is fixedly connected to the second rectangular column, the top of the second rectangular column is fixedly connected to the fifth block, the bottom of the second rectangular column is fixedly connected to the sixth block, and the outer surface of the second rectangular column is fixedly connected to the second support rod.

[0009] According to the above technical solution, the first butterfly spring group is composed of symmetrically arranged single butterfly spring sheets, and the top butterfly spring sheet is fixedly connected to the bottom of the slotted cylinder, the inner surface of the first clamping sleeve is clamped with the outer surface of the first hydraulic pump, and a second clamping sleeve is provided at the bottom of the first clamping sleeve. The outer surface of the second clamping sleeve is provided with a first circular column, a first spring, a second circular column and a second spring, and the first circular column, the first spring, the second circular column and the second spring provided on the outer surface of the first clamping sleeve are placed vertically, and the inner surface of the second clamping sleeve is clamped with the outer surface of the first hydraulic pump.

[0010] According to the above technical solution, the third circular column is slidably connected to the first end cover by opening a through hole, the second piston is coaxial with the first piston, and the right side of the guide sleeve is in contact with the left side of the first piston.

[0011] According to the above technical solution, each group of the piston centering mechanism has two clamping assemblies that are symmetrically arranged and clamped up and down. There are two groups of piston centering mechanisms, which are stacked and do not interfere with each other. The lower surfaces of the limit connecting block and the limit clamping block are in contact with the inner surface of the shell. The upper and lower surfaces of the interior of the shell are provided with straight slots, and the third clamping block and the fifth clamping block are clamped therein.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. This type of hydraulic cylinder with shock absorption and buffering function can effectively reduce the vibration caused by sudden changes in the working pressure and speed of the hydraulic cylinder when the load changes suddenly by setting a hydraulic force amplification mechanism, thereby improving the stability and reliability of the system and extending the service life of the equipment.

[0013] 2. This type of hydraulic cylinder with shock-absorbing and buffering function can effectively reduce the impact and vibration generated by the hydraulic cylinder during operation by setting a buffer mechanism, protect the stability of equipment and systems, reduce the wear and damage of equipment caused by vibration, extend the service life of the equipment, make the movement of the hydraulic cylinder more stable, improve the working accuracy and be applicable to various working environments and load conditions.

[0014] 3. This type of hydraulic cylinder with shock-absorbing and buffering function can automatically adjust the position of the piston by setting a piston centering mechanism, so that it always maintains a good fit with the cylinder barrel, reducing friction and vibration. It can also make the flow of hydraulic oil between the piston and the cylinder barrel smoother, reduce pressure fluctuations, and improve the working efficiency and stability of the hydraulic cylinder. The piston centering mechanism can also absorb and buffer the impact of external shocks and load changes to a certain extent, protecting the hydraulic cylinder and the entire hydraulic system from damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention.

[0016] Figure 2 It is a cross-sectional view of the main structure of the present invention.

[0017] Figure 3 It is a structural schematic diagram of the hydraulic force amplification mechanism of the present invention.

[0018] Figure 4 It is a structural sectional view of the hydraulic booster mechanism of the present invention.

[0019] Figure 5 It is a structural sectional view of the buffer mechanism of the present invention.

[0020] Figure 6 It is a partial schematic diagram of the structure of the piston centering mechanism of the present invention.

[0021] Figure 7It is a structural schematic diagram of the piston centering mechanism of the present invention.

[0022] Figure 8 This is a structural sectional view of the piston centering mechanism of the present invention.

[0023] Figure 9 Schematic diagram of the centering assembly of the piston centering mechanism of the present invention.

[0024] Figure 10 Schematic diagram of the fixture assembly of the piston centering mechanism of the present invention.

[0025] Figure 11 It is a partial schematic diagram of the centering component of the structure of the piston centering mechanism of the present invention.

[0026] In the figure: 1, cylinder; 2, first end cover; 3. Hydraulic force amplification mechanism; 301, first connecting block; 302, first butterfly spring assembly; 303, notched cylinder; 304, first hydraulic pump; 305, first horizontal plate; 306, first clamping block; 307, second clamping block; 308, first clamping sleeve; 309, first circular column; 310, first spring; 311, second circular column; 312, second spring; 313, second clamping sleeve; 4. Second end cover; 5. First piston; 6. Buffer mechanism; 601, second transverse plate; 602, second connecting block; 603, third transverse plate; 604, third circular column; 605, rubber ferrule; 606, second piston; 607, guide sleeve; 608, second sealing ring; 609, rubber collar; 610, second butterfly spring assembly; 7. Piston rod; 8. First sealing ring; 9. Piston centering mechanism; 901, housing; 902, straight notch; 9001, fixture assembly; 903, third clamping block; 904, first rectangular column; 905, fourth clamping block; 906, first support rod; 907, first connecting rod; 908, through-hole cylinder; 909, piston rod pushing clamping block; 910, first rotating shaft; 911, second rotating shaft; 9002, centering components; 912. First rotating rod; 913. Second rotating rod; 914. Position-limiting rotating shaft; 915. Position-limiting connecting block; 916. Third rotating shaft; 917. Fourth rotating shaft; 918. Position-limiting clamping block; 919. Second hydraulic pump; 920. Second rectangular column; 921. Fifth clamping block; 922. Sixth clamping block; 923. Second support rod; 924. Third spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention.

[0029] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0030] Example 1: See Figure 1-Figure 5 The present invention provides a technical solution: a hydraulic cylinder with shock-absorbing and buffering functions, comprising a cylinder barrel 1, a first end cover 2 is fixedly connected to the left side of the cylinder barrel 1, a buffer mechanism 6 is slidably connected to the left side of the first end cover 2, a second end cover 4 is fixedly connected to the right side of the cylinder barrel 1, a piston centering mechanism 9 is fixedly connected to the right side of the second end cover 4, a hydraulic force amplification mechanism 3 is fixedly connected to the outer surface of the first end cover 2, a first piston 5 is slidably connected to the inner surface of the cylinder barrel 1, a first sealing ring 8 is clamped on the outer surface of the first piston 5, and a piston rod 7 is fixedly connected to the right side of the first piston 5.

[0031] The hydraulic booster mechanism 3 includes a first connecting block 301, which is fixedly connected to the outer surface of the first end cover 2. The outer surface of the first connecting block 301 is fixedly connected to the first butterfly spring group 302. The top of the first butterfly spring group 302 is fixedly connected to the notched cylinder 303. The interior of the notched cylinder 303 is clamped with a first clamping block 306 through a clamping slot. The top of the first clamping block 306 is fixedly connected to the first hydraulic pump 304. The outer surface of the first hydraulic pump 304 is fixedly connected to the second clamping block 307. The output end of the first hydraulic pump 304 is fixedly connected to the first horizontal plate 305. The first horizontal plate 305 is fixedly connected to the top of the piston rod 7. A first circular column 309 is fixedly connected to the interior of the notched cylinder 303. The first circular column 309 is clamped with a first ferrule 308 via a through-hole. A first spring 310 is provided on the outer surface of the first circular column 309. The upper end of the first spring 310 is fixedly connected to the inner surface of the notched cylinder 303. A second circular column 311 is fixedly connected to the interior of the notched cylinder 303. The second circular column 311 is clamped with the first ferrule 308 via a through-hole. A second spring 312 is provided on the second circular column 311. The lower end of the second spring 312 is fixedly connected to the inner surface of the notched cylinder 303. The first butterfly spring group 302 is composed of a single butterfly spring sheet arranged symmetrically, and the butterfly spring sheet at the top is fixedly connected to the bottom of the notched cylinder 303. The inner surface of the first clamping sleeve 308 is clamped with the outer surface of the first hydraulic pump 304. The bottom of the first clamping sleeve 308 is provided with a second clamping sleeve 313. The outer surface of the second clamping sleeve 313 is provided with a first circular column 309, a first spring 310, a second circular column 311 and a second spring 312. The first circular column 309, the first spring 310, the second circular column 311 and the second spring 312 arranged on the outer surface of the first clamping sleeve 308 are arranged vertically. The inner surface of the second clamping sleeve 313 is clamped with the outer surface of the first hydraulic pump 304. By providing the hydraulic boosting mechanism 3, the first hydraulic pump 304 and the first butterfly spring group 302 can effectively reduce the vibration caused by the working pressure and speed mutation of the hydraulic cylinder when the load suddenly changes, thereby improving the stability and reliability of the system, extending the service life of the equipment, and strengthening the vibration buffering by reducing the vibration.

[0032] The buffer mechanism 6 includes a second transverse plate 601, the bottom of the second transverse plate 601 is fixedly connected to the second connecting block 602, the bottom of the second connecting block 602 is fixedly connected to the third transverse plate 603, the interior of the second transverse plate 601 is fixedly connected to the third circular column 604 via a through hole, the outer surface of the third circular column 604 is fixedly clamped with a rubber sleeve 605, the bottom of the third circular column 604 is fixedly connected to the second piston 606, the outer surface of the second piston 606 is clamped with a second sealing ring 608 and a rubber ring 609 via a clamping groove, the bottom of the second piston 606 is fixedly connected to a guide sleeve 607, the bottom of the third transverse plate 603 is fixedly connected to the second butterfly spring group 610, and the bottom of the second butterfly spring group 610 is fixedly connected to the outer surface of the first end cover 2.

[0033] The third circular column 604 is slidably connected to the first end cover 2 by opening a through hole, the second piston 606 is coaxial with the first piston 5, and the right side of the guide sleeve 607 is in contact with the left side of the first piston 5. By setting up the buffer mechanism 6, the second piston 606 and the second butterfly spring group 610 can effectively reduce the impact and vibration generated by the hydraulic cylinder during operation, protect the stability of the equipment and system, reduce the wear and damage of the equipment caused by vibration, extend the service life of the equipment, make the movement of the hydraulic cylinder more stable, improve the working accuracy and be applicable to various working environments and load conditions.

[0034] The working principle of this embodiment is as follows: when using this hydraulic cylinder with shock-absorbing and buffering functions, the second cross plate 601 is forced to move inward and drives the second connecting block 602 and the third cross plate 603 to move inward, the second butterfly spring group 610 is compressed, and the third circular column 604 fixedly connected to the second cross plate 601 moves inward, pushing the second piston 606 to move inward, and the limit of the inward movement of the third circular column 604 cannot cause a gap between the second piston 606 and the through hole opened inside the first end cover 2. At this time, the symmetrically arranged first hydraulic pump 304 is compressed through the first cross plate 305 and the piston rod 7 on the same day, and bears the load at the same time, and disperses the load through the first hydraulic pump 304. When the load changes significantly, the first hydraulic pump 304 transmits the vertical vibration to the first through the first clamping block 306 and the second clamping block 307. The butterfly spring group 302 absorbs, and the lateral force at this time is transmitted by the first clamping sleeve 308 to the first spring 310 and the second spring 312 for absorption. The first circular column 309 and the second circular column 311 are formed through the through hole opened by the first clamping sleeve 308, so that the first spring 310 and the second spring 312 can be compressed and deformed. At this time, if the return stroke is made, when approaching the end of the stroke, the first piston 5 contacts the guide sleeve 607. At this time, the guide sleeve 607 pushes the second piston 606 outward, and the rubber clamping sleeve 605, the second sealing ring 608 and the rubber ring 609 make the first end cover 2 fit tightly with the third circular column 604 and the second piston 606. At this time, the hydraulic oil inside the first end cover 2 is pushed by the second piston 606 and consumed, and cooperates with the second butterfly spring group 610 to slow down the movement speed of the piston, thereby reducing impact and vibration.

[0035] Example 2: Please refer to Figures 6-11On the basis of the first embodiment, the present invention provides a technical solution: the piston centering mechanism 9 includes a housing 901, the inner wall of the housing 901 is provided with a straight slot 902, the interior of the straight slot 902 is clamped with a clamp assembly 9001, the clamp assembly 9001 includes a third clamping block 903, the third clamping block 903 is clamped with the straight slot 902, the bottom of the fourth clamping block 905 is fixedly connected to the first rectangular column 904, the top of the first rectangular column 904 is fixedly connected to the third clamping block 903, and the left side of the first rectangular column 904 is fixedly connected to the first support rod 906, the right side of the first rectangular column 904 is fixedly connected to the outer surface of the first connecting rod 907 and the third spring 924, the outer surface of the first connecting rod 907 is slidably connected to the through-hole cylinder 908, the bottom of the through-hole cylinder 908 is fixedly connected to the piston rod pushing block 909, the top of the third spring 924 is fixedly connected to the piston rod pushing block 909, the piston rod pushing block 909 is fixedly connected to the first rotating shaft 910 and the second rotating shaft 911 through the slot, and the outer surface of the first rotating shaft 910 is rotatably connected to the centering component 9002 The centering assembly 9002 includes a first rotating rod 912, which is rotatably connected to the first rotating shaft 910. The outer surface of the second rotating shaft 911 is rotatably connected to the second rotating rod 913. The second rotating rod 913 is rotatably connected to the middle portion of the limiting rotating shaft 914 through a through hole. The outer surface of the limiting rotating shaft 914 is fixedly connected to the limiting connecting block 915. The outer surface of the limiting rotating shaft 914 is rotatably connected to the first rotating rod 912. The right side of the first rotating rod 912 is rotatably connected to the third rotating shaft 916 through a through hole. The right side of the second rotating rod 913 is rotatably connected to the limiting rotating shaft 914 through a through hole. The fourth rotating shaft 917 is rotatably connected, and the outer surface of the fourth rotating shaft 917 and the outer surface of the third rotating shaft 916 are connected to the limiting block 918 through a slot. The right side of the limiting block 918 is fixedly connected to the second hydraulic pump 919, and the right side of the second hydraulic pump 919 is fixedly connected to the second rectangular column 920. The top of the second rectangular column 920 is fixedly connected to the fifth block 921, the bottom of the second rectangular column 920 is fixedly connected to the sixth block 922, and the outer surface of the second rectangular column 920 is fixedly connected to the second support rod 923.

[0036] Each group of piston centering mechanisms 9 has two clamping assemblies 9001 that are symmetrically arranged and clamped up and down by centering assemblies 9002. There are two groups of piston centering mechanisms 9, which are stacked and do not interfere with each other. The lower surfaces of the limit connection block 915 and the limit clamping block 918 are in contact with the inner surface of the shell 901. The upper and lower surfaces of the interior of the shell 901 are both provided with straight slots 902, and are clamped with a third clamping block 903 and a fifth clamping block 921. By setting up the piston centering mechanism 9, the position of the piston can be automatically adjusted through the cooperation of the clamping assembly 9001 and the centering assembly 9002, so that it always maintains a good fit with the cylinder 1, reducing friction and vibration, and can also make the flow of hydraulic oil between the piston and the cylinder 1 smoother, reduce pressure fluctuations, and improve the working efficiency and stability of the hydraulic cylinder. The piston centering mechanism 9 can also absorb and buffer the impact of external shocks and load changes to a certain extent, protecting the hydraulic cylinder and the entire hydraulic system from damage.

[0037] The working principle of this embodiment is as follows: when using this hydraulic cylinder with shock-absorbing and buffering functions, if the gap between the piston rod 7 and the cylinder 1 is too large or too small, it will cause vibration, affecting the reduction and buffering of vibration. At this time, the second hydraulic pump 919 pushes the limit block 918 to move outward, and at the same time drives the second rectangular column 920, the fifth block 921 and the sixth block 922 to move outward along the symmetrically arranged straight slot 902. Since the second support rod 923 stops the movement, it is converted to move the limit block 918 outward. The limit block 918 causes the third rotating shaft 916 and the fourth rotating shaft 917 to slide in the center of the slot through the internal slot, and the first rotating rod 912 and the second rotating rod 913 are moved inward at the same time through the limit rotating shaft 914 and the limit connecting block 915, so as to realize During centering, the symmetrically arranged first rectangular column 904, the third block 903 and the fourth block 905 are moved inward along the symmetrically arranged straight slot 902 through the first support rod 906. At this time, the through-hole cylinder 907 fixedly connected to the first rectangular column 904 is tightly matched with the first connecting rod 908 to form air tightness, and push the symmetrically arranged piston rod push block 909 to contact the outer surface of the piston rod 7. The first rotating rod 912 and the second rotating rod 913 are centered through the first rotating shaft 910 and the second rotating shaft 911 and at the same time push the symmetrically arranged piston rod push block 909 to contact the outer surface of the piston rod 7. The third spring 924 is used to absorb possible vibrations and cooperate with the symmetrically arranged piston centering mechanism 9 to achieve tight clamping.

[0038] 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.

[0039] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A hydraulic cylinder with a shock-absorbing and buffering function, comprising a cylinder barrel (1), characterized in that: The left side of the cylinder barrel (1) is fixedly connected to a first end cover (2), the left side of the first end cover (2) is slidably connected to a buffer mechanism (6), the right side of the cylinder barrel (1) is fixedly connected to a second end cover (4), the right side of the second end cover (4) is fixedly connected to a piston centering mechanism (9), the outer surface of the first end cover (2) is fixedly connected to a hydraulic boosting mechanism (3), the inner surface of the cylinder barrel (1) is slidably connected to a first piston (5), the outer surface of the first piston (5) is clamped to a first sealing ring (8), and the right side of the first piston (5) is fixedly connected to a piston rod (7); The buffer mechanism (6) comprises a second transverse plate (601), the bottom of the second transverse plate (601) is fixedly connected to a second connecting block (602), the bottom of the second connecting block (602) is fixedly connected to a third transverse plate (603), the interior of the second transverse plate (601) is fixedly connected to a third circular column (604) via a through hole, the outer surface of the third circular column (604) is fixedly clamped with a rubber sleeve (605), the bottom of the third circular column (604) is fixedly connected to a second piston (606), the outer surface of the second piston (606) is clamped with a second sealing ring (608) and a rubber sleeve (609) via a clamping groove, the bottom of the second piston (606) is fixedly connected to a guide sleeve (607), the bottom of the third transverse plate (603) is fixedly connected to a second butterfly spring group (610), and the bottom of the second butterfly spring group (610) is fixedly connected to the outer surface of the first end cover (2).

2. The hydraulic cylinder with shock absorbing and buffering function according to claim 1, characterized in that: The piston centering mechanism (9) includes a shell (901), an inner wall of the shell (901) is provided with a straight notch (902), a clamp assembly (9001) is clamped inside the straight notch (902), the clamp assembly (9001) includes a third clamping block (903), the third clamping block (903) is clamped with the straight notch (902), the bottom of the fourth clamping block (905) is fixedly connected to a first rectangular column (904), the top of the first rectangular column (904) is fixedly connected to the third clamping block (903), the left side of the first rectangular column (904) is fixedly connected to a first support rod (906), the first rectangular column The right side of (904) is fixedly connected with the outer surface of the first connecting rod (907) and the third spring (924), the outer surface of the first connecting rod (907) is slidably connected with the through-hole cylinder (908), the bottom of the through-hole cylinder (908) is fixedly connected with the piston rod pushing block (909), the top of the third spring (924) is fixedly connected with the piston rod pushing block (909), the piston rod pushing block (909) is fixedly connected with the first rotating shaft (910) and the second rotating shaft (911) through the slot, the outer surface of the first rotating shaft (910) is rotatably connected with the centering component (9002), the centering component (90 02) includes a first rotating rod (912), the first rotating rod (912) is rotatably connected to the first rotating shaft (910), the outer surface of the second rotating shaft (911) is rotatably connected to the second rotating rod (913), the second rotating rod (913) is rotatably connected to the middle part of the limited rotating shaft (914) through a through hole, the outer surface of the limited rotating shaft (914) is fixedly connected to the limited connecting block (915), the outer surface of the limited rotating shaft (914) is rotatably connected to the first rotating rod (912), the right side of the first rotating rod (912) is rotatably connected to the third rotating shaft (916) through a through hole, the right side of the second rotating rod (913) is rotatably connected to the third rotating shaft (916) through a through hole, and the right side of the second rotating rod (913) is rotatably connected to the limited rotating shaft (914) through a through hole. A fourth rotating shaft (917) is rotatably connected, and the outer surface of the fourth rotating shaft (917) and the outer surface of the third rotating shaft (916) are engaged with a limiting block (918) by providing a card slot, the right side of the limiting block (918) is fixedly connected to a second hydraulic pump (919), the right side of the second hydraulic pump (919) is fixedly connected to a second rectangular column (920), the top of the second rectangular column (920) is fixedly connected to a fifth block (921), the bottom of the second rectangular column (920) is fixedly connected to a sixth block (922), and the outer surface of the second rectangular column (920) is fixedly connected to a second support rod (923).

3. The hydraulic cylinder with shock absorbing and buffering function according to claim 1, characterized in that: The third circular column (604) is slidably connected to the first end cover (2) by opening a through hole, the second piston (606) is coaxial with the first piston (5), and the right side of the guide sleeve (607) is in contact with the left side of the first piston (5).

4. The hydraulic cylinder with shock absorbing and buffering function according to claim 2, characterized in that: Each group of the clamping components (9001) of the piston centering mechanism (9) has two symmetrically arranged centering components (9002) that are clamped up and down. There are two groups of the piston centering mechanism (9), which are stacked and do not interfere with each other. The lower surfaces of the limiting connecting block (915) and the limiting clamping block (918) are in contact with the inner surface of the shell (901). The upper and lower surfaces of the interior of the shell (901) are both provided with straight slots (902), and are clamped with a third clamping block (903) and a fifth clamping block (921).

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