Fluid pressure executing mechanism of hydraulic system

Abstract

The invention discloses a fluid pressure executing mechanism of a hydraulic system, and relates to the technical field of fluid pressure execution. The left end cover is fixed at the left end of the cylinder body; the right end cover is fixed at the right end of the cylinder body and corresponds to the left end cover; the piston adjusting device is arranged in the cylinder body in a sliding manner; the connecting rod is arranged on the central axis of the cylinder body, is fixedly connected with the piston adjusting device and is in sliding connection with the center of the right end cover; one end of the buffer assembly is fixedly connected with the left end cover, and the other end is slidably arranged in the connecting rod. Thrust of oil pressure to the piston is more evenly distributed on the piston, the moving stability of the piston is effectively improved, meanwhile, step-by-step transmission is conducted under the oil pressure change, fatigue damage to the piston caused by rapid oil pressure change is effectively avoided, movement of the connecting rod is buffered, and the connecting rod stably moves and resets in the cylinder body.

Description

Technical Field

[0001] The present invention relates to the field of fluid pressure execution technology, and more specifically, to a fluid pressure execution mechanism of a hydraulic system. Background Art

[0002] Fluid actuators consisting of a drive cylinder and a piston are widely used in the field of engineering technology. The conventional design is to use a distribution valve to allow pressurized fluid to alternately enter the two sides of the piston in the drive cylinder, thereby pushing the external load body fixed to the piston rod to perform bidirectional movement. The hydraulic cylinder is a type of fluid pressure actuator, which is mainly used on some large load-bearing equipment. The hydraulic cylinder can provide stable power for these large equipment to ensure the normal operation of construction operations. In actual use, during the process of the piston buffering and moving in the hydraulic cylinder, the force uniformity of the piston is poor, the movement stability of the piston is insufficient, and during the working process, it is difficult for the hydraulic cylinder to be slowly reset due to the influence of the gravity of the hydraulic equipment itself, so that the piston and the bottom wall of the cylinder of the hydraulic cylinder are subjected to a large impact. Therefore, it is necessary to provide a hydraulic system fluid pressure actuator to solve the problems raised in the above background technology. Summary of the invention

[0003] To achieve the above object, the present invention provides the following technical solution: a hydraulic system fluid pressure actuator, comprising:

[0004] Cylinder body;

[0005] The left end cover is fixed to the left end of the cylinder body;

[0006] The right end cover is fixed to the right end of the cylinder body and corresponds to the left end cover;

[0007] A piston adjustment device, slidably disposed in the cylinder body;

[0008] A connecting rod is arranged on the central axis of the cylinder body, fixedly connected to the piston adjusting device, and slidably connected to the center of the right end cover;

[0009] The buffer component has one end fixedly connected to the left end cover and the other end slidably arranged inside the connecting rod.

[0010] Further, as a preference, a first oil port is provided on the side of the left end cover, a second oil port is provided on the side of the right end cover, and the first oil port and the second oil port are connected to both ends of the cylinder body and an external oil tank respectively.

[0011] Further, as a preference, the piston adjustment device comprises:

[0012] A central connecting piece is slidably disposed in the cylinder body, and a side of the central connecting piece close to the right end cover is fixedly connected to the connecting rod;

[0013] A first piston surface is slidably disposed in the cylinder body and is located on the left side of the central connecting member, and the center of the first piston surface is slidably connected to the buffer assembly;

[0014] A second piston surface is slidably disposed in the cylinder body, is disposed corresponding to the first piston surface, is located on the right side of the central connecting member, and the center of the second piston surface is slidably connected to the connecting rod;

[0015] The multi-stage buffer mechanism is symmetrically distributed with two groups about the central connecting member and is respectively fixed on both sides of the central connecting member, and the multi-stage buffer mechanism is respectively fitted with the corresponding first piston surface and second piston surface.

[0016] Further, as a preference, the central connecting member comprises:

[0017] A connecting circular surface is arranged in the cylinder body, and is fixedly connected to the connecting rod at the center of one side close to the right end cover, and both sides of the connecting circular surface are respectively fixedly connected to the corresponding multi-stage buffer mechanism;

[0018] The sealing ring is fixed on the outer ring of the connecting circular surface, and the sealing ring is slidably connected with the inner wall of the cylinder body.

[0019] Further, as a preference, the multi-stage buffer mechanism comprises:

[0020] An external compression assembly, one end of which is fixedly connected to the side surface of the connecting circular surface, and the other end of which is in contact with the piston surface;

[0021] There are multiple internal compression components distributed in sequence from the outer side of the connecting circular surface to the center, and the internal compression components are arranged on the inner side of the external compression component. One end of the internal compression component is fixedly connected to the side surface of the connecting circular surface, and the other end corresponds to the piston surface, and the structures of the internal compression component and the external compression component are the same.

[0022] Further, preferably, the compression assembly comprises:

[0023] A fixed annular surface, fixed to the side of the connecting circular surface;

[0024] A compression spring is fixed on a side of the fixed annular surface away from the connecting circular surface;

[0025] A connecting ring surface is fixed to an end of the compression spring away from the fixed ring surface, and the connecting ring surface corresponds to the side of the piston surface;

[0026] A spacer annular surface is fixed to the inner ring of the connecting annular surface, and the spacer annular surface is in contact with the adjacent compression assembly;

[0027] The pushing annular surface is fixed at the inner middle part of the spacing annular surface and is parallel to the connecting annular surface in the adjacent compression assembly.

[0028] Further, as a preference, the compression degrees of the plurality of compression springs decrease successively from the outer side of the connecting circular surface to the center, and during the compression process of the compression springs, each pushing annular surface must fit with the corresponding connecting annular surface.

[0029] Further, as a preference, the buffer component comprises:

[0030] A limit rod, one end of which is fixedly connected to the left end cover, and the other end of which passes through the first piston surface and the central connecting piece and is arranged in the connecting rod;

[0031] A positioning slider is fixed to one end of the limit rod located inside the connecting rod, and the positioning slider is slidably disposed inside the connecting rod;

[0032] The buffer spring is sleeved on the limiting rod and is located inside the connecting rod and is fixedly connected to the side of the positioning slide block.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] In the present invention, through the setting of the piston adjusting device, when the pressure of the hydraulic oil changes and the connecting rod is pushed by the piston, under the action of the multi-stage buffer mechanism, before the oil pressure of the hydraulic oil pushes the connecting rod to move, the thrust of the oil pressure on the piston is more evenly distributed on the piston, thereby effectively improving the stability of the movement of the piston. At the same time, under the action of the piston adjusting device, the oil pressure on both sides of the piston is transmitted, and when the oil pressure changes, it is transmitted step by step through the multi-stage buffer mechanism, thereby effectively avoiding fatigue damage to the piston caused by rapid changes in oil pressure. Through the setting of the buffer component, the movement of the connecting rod is buffered, so that the connecting rod can move smoothly and reset in the cylinder body. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of a fluid pressure actuator of a hydraulic system;

[0036] Figure 2 It is a structural schematic diagram of a piston adjusting device;

[0037] Figure 3 It is a schematic diagram of the structure of the central connecting piece and the multi-stage buffer mechanism;

[0038] Figure 4 It is a schematic diagram of the structure of the compression spring assembly;

[0039] Figure 5 It is a schematic diagram of the structure of the buffer component;

[0040] In the figure: 1. cylinder body; 2. left end cover; 3. right end cover; 4. piston adjusting device; 5. connecting rod; 6. buffer assembly; 21. first oil port; 31. second oil port; 41. center connecting piece; 42. first piston surface; 43. second piston surface; 44. multi-stage buffer mechanism; 61. limit rod; 62. positioning slider; 63. buffer spring; 411. connecting circular surface; 412. sealing ring; 441. external compression assembly; 442. internal compression assembly; 4411. fixing annular surface; 4412. compression spring; 4413. connecting annular surface; 4414. spacing annular surface; 4415. pushing annular surface. DETAILED DESCRIPTION

[0041] See also Figure 1 to Figure 5 In an embodiment of the present invention, a hydraulic system fluid pressure actuator includes:

[0042] Cylinder 1;

[0043] A left end cover 2 is fixed to the left end of the cylinder body 1;

[0044] The right end cover 3 is fixed to the right end of the cylinder body 1 and corresponds to the left end cover 2;

[0045] A piston adjusting device 4 is slidably arranged in the cylinder body 1;

[0046] The connecting rod 5 is arranged on the central axis of the cylinder body 1, fixedly connected to the piston adjustment device 4, and slidably connected to the center of the right end cover 3;

[0047] The buffer assembly 6 has one end fixedly connected to the left end cover 2 and another end slidably disposed inside the connecting rod 5 .

[0048] In this embodiment, a first oil port 21 is provided on the side of the left end cover 2, and a second oil port 31 is provided on the side of the right end cover 3. The first oil port 21 and the second oil port 31 are connected to both ends of the cylinder body 1 and the external oil tank respectively.

[0049] That is to say, under the action of the first oil port 21, the space between the left end cover 2 and the piston adjusting device 4 in the cylinder body 1 is connected to the external oil tank, and by controlling the oil pressure input to the first oil port 21, pressure is applied to the left side of the piston adjusting device 4, driving the piston adjusting device 4 and the connecting rod 5 to move in the direction of the right end cover 3; under the action of the second oil port 31, the space between the right end cover 3 and the piston adjusting device 4 in the cylinder body 1 is connected to the external oil tank, and by controlling the oil pressure input to the second oil port 31, pressure is applied to the right side of the piston adjusting device 4, driving the piston adjusting device 4 and the connecting rod 5 to move in the direction of the left end cover 2; when the oil pressure input to the first oil port 21 is greater than the oil pressure input to the second oil port 31, under the action of the oil pressure, the piston adjusting device 4 and the connecting rod 5 move in the direction of the right end cover 3; when the oil pressure input to the first oil port 21 is less than the oil pressure input to the second oil port 31, under the action of the oil pressure, the piston adjusting device 4 and the connecting rod 5 move in the direction of the left end cover 2, and the position of the connecting rod 5 is controlled.

[0050] In this embodiment, the piston adjustment device 4 includes:

[0051] A central connecting member 41 is slidably disposed in the cylinder body 1, and a side of the central connecting member 41 close to the right end cover 3 is fixedly connected to the connecting rod 5;

[0052] A first piston surface 42 is slidably disposed in the cylinder body 1 and is located on the left side of the central connecting member 41, and the center of the first piston surface 42 is slidably connected to the buffer assembly 6;

[0053] The second piston surface 43 is slidably disposed in the cylinder body 1, is disposed corresponding to the first piston surface 42, is located on the right side of the central connecting member 41, and the center of the second piston surface 43 is slidably connected to the connecting rod 5;

[0054] The multi-stage buffer mechanism 44 is symmetrically distributed with two groups about the central connecting member 41 and is respectively fixed on both sides of the central connecting member 41 , and the multi-stage buffer mechanism 44 is respectively fitted with the corresponding first piston surface 42 and second piston surface 43 .

[0055] That is to say, when the oil pressure input to the first oil port 21 is greater than the oil pressure input to the second oil port 31, that is, the pressure received by the first piston surface 42 is greater than the pressure received by the second piston surface 43, under the primary dispersion of the multi-stage buffer mechanism 44, the oil pressure is evenly distributed on the piston surface, and then under the action of the oil pressure, the center connecting member 41 drives the connecting rod 5 to move smoothly in the direction of the right end cover 3, and pushes the connecting rod 5 out; when the oil pressure input to the first oil port 21 is less than the oil pressure input to the second oil port 31, that is, the pressure received by the first piston surface 42 is less than the pressure received by the second piston surface 43, under the primary dispersion of the multi-stage buffer mechanism 44, the oil pressure is evenly distributed on the piston surface, and then under the action of the oil pressure, the center connecting member 41 drives the connecting rod 5 to move in the direction of the left end cover 2, and retracts the connecting rod 5.

[0056] In this embodiment, the central connecting member 41 includes:

[0057] The connecting circular surface 411 is arranged in the cylinder body 1, and is fixedly connected to the connecting rod 5 at the center of one side close to the right end cover 3. Both sides of the connecting circular surface 411 are respectively fixedly connected to the corresponding multi-stage buffer mechanism 44;

[0058] The sealing ring 412 is fixed on the outer ring of the connecting circular surface 411 , and the sealing ring 412 is slidably connected to the inner wall of the cylinder body 1 .

[0059] That is to say, the connecting circular surface 411 serves as the middle fixed point of the multi-stage buffer mechanism 44 on both sides. The pressure exerted on the first piston surface 42 and the second piston surface 43 is buffered and distributed by the multi-stage buffer mechanism 44, and finally converges at the connecting circular surface 411. The connecting circular surface 411 is pushed to move according to the size of the oil pressure on both sides, and then slides on the inner wall of the cylinder body 1 through the sealing ring 412, and at the same time drives the connecting rod 5 to move and adjust on the cylinder body 1.

[0060] In this embodiment, the multi-stage buffer mechanism 44 includes:

[0061] The outer compression assembly 441 has one end fixedly connected to the side surface of the connecting circular surface 411 and the other end in contact with the piston surface;

[0062] There are multiple internal compression components 442 distributed in sequence from the outer side of the connecting circular surface 411 to the center, and the internal compression components 442 are arranged on the inner side of the external compression component 441. One end of the internal compression component 442 is fixedly connected to the side of the connecting circular surface 411, and the other end corresponds to the piston surface, and the structures of the internal compression component 442 and the external compression component 441 are the same.

[0063] That is to say, when the piston surface is subjected to pressure from the hydraulic oil, the piston surface is pushed to compress the external compression component 441 under the action of the oil pressure, and the force of the oil pressure is gradually dispersed on the piston surface, and then the internal compression component 442 is compressed in turn, and the thrust of the oil pressure on the piston surface is gradually distributed more evenly on the piston surface, effectively improving the smoothness of the movement of the piston adjusting device 4, so that the piston surface pushes the central connecting piece 41 to drive the connecting rod 5 to slide stably in the cylinder body 1.

[0064] In this embodiment, the compression component includes:

[0065] A fixed annular surface 4411 is fixed to the side of the connecting circular surface 411;

[0066] A compression spring 4412 is fixed to a side of the fixed annular surface 4411 away from the connecting circular surface 411;

[0067] A connecting ring surface 4413 is fixed to one end of the compression spring 4412 away from the fixed ring surface 4411, and the connecting ring surface 4413 corresponds to the side of the piston surface;

[0068] The spacer annular surface 4414 is fixed to the inner ring of the connecting annular surface 4413, and the spacer annular surface 4414 is in contact with the adjacent compression assembly;

[0069] The pushing annular surface 4415 is fixed at the inner middle portion of the spacing annular surface 4414 and is parallel to the connecting annular surface 4413 in the adjacent compression assembly.

[0070] That is to say, when the piston surface moves toward the center connecting piece 41 under the action of oil pressure, the piston surface first pushes the connecting ring surface 4413 of the outer compression component 441 to compress the corresponding compression spring 4412. During the compression of the compression spring 4412, the connecting ring surface 4413 drives the corresponding spacing ring surface 4414 and the pushing ring surface 4415 to move toward the connecting ring surface 4413 on the adjacent inner compression component 442, and then under the action of the pushing ring surface 4415, the compression spring 4412 in the corresponding inner compression component 442 is compressed. As the piston surface moves, the compression springs 4412 in each inner compression component 442 are compressed in turn until the center connecting piece 41 is pushed to move in the cylinder body 1. Under the action of the multi-stage compression component, not only is the pressure exerted on the piston surface by the hydraulic oil more evenly distributed, but also during the rapid adjustment of the oil pressure, the multi-stage buffer effectively avoids fatigue damage to the piston caused by rapid changes in the oil pressure.

[0071] In this embodiment, the compression degree of the plurality of compression springs 4412 decreases from the outer side of the connecting circular surface 411 to the center, and each pushing annular surface 4415 must fit with the corresponding connecting annular surface 4413 during the compression process of the compression spring 4412 .

[0072] That is to say, under the push of oil pressure, the multiple compression springs 4412 distributed on the central connecting member 41 are compressed in turn, giving the central connecting member 41 sufficient reaction and adjustment time, effectively avoiding fatigue damage to the piston caused by rapid changes in oil pressure. It should be noted that before the outer compression spring 4412 is compressed to the limit, the pushing ring surface 4415 corresponding to the compression spring 4412 must be in contact with the connecting ring surface 4413 in the adjacent compression assembly to ensure that the multiple compression springs 4412 can be buffered under the push of the piston surface, gradually adjust the pressure applied by the hydraulic oil on the piston surface, so that the pressure applied by the hydraulic oil on the piston surface is more evenly distributed, effectively improving the stability of the movement of the piston adjusting device 4 in the cylinder body 1.

[0073] In this embodiment, the buffer component 6 includes:

[0074] A limiting rod 61, one end of which is fixedly connected to the left end cover 2, and the other end of which passes through the first piston surface 42 and the central connecting member 41 and is arranged in the connecting rod 5;

[0075] A positioning slider 62 is fixed to one end of the limiting rod 61 located inside the connecting rod 5, and the positioning slider 62 is slidably disposed inside the connecting rod 5;

[0076] The buffer spring 63 is sleeved on the limiting rod 61 and is located inside the connecting rod 5 , and is fixedly connected to the side of the positioning slide block 62 .

[0077] That is to say, when the oil pressure input to the first oil port 21 is greater than the oil pressure input to the second oil port 31, that is, the pressure on the first piston surface 42 is greater than the pressure on the second piston surface 43, the central connecting member 41 drives the connecting rod 5 to move on the limiting rod 61 in the direction of the right end cover 3. Under the buffering effect of the buffer spring 63, the connecting rod 5 moves smoothly on the limiting rod 61 to push the connecting rod 5 out, effectively preventing the piston adjusting device 4 from moving quickly in the cylinder body 1 and causing impact on the right end cover 3, thereby damaging the piston surface; when the first When the oil pressure of the oil port 21 is less than the oil pressure input to the second oil port 31, that is, the pressure on the first piston surface 42 is less than the pressure on the second piston surface 43, the central connecting member 41 drives the connecting rod 5 to move and reset on the limit rod 61 in the direction of the left end cover 2. When the first piston surface 42 approaches the left end cover 2, under the buffering effect of the buffer spring 63, the connecting rod 5 and the piston adjusting device 4 are decelerated, effectively preventing the piston adjusting device 4 from causing an impact on the left end cover 2 when it moves and resets quickly in the cylinder body 1, thereby damaging the piston surface.

[0078] During the specific implementation, first, in the initial state, the oil pressure input to the first oil port 21 and the second oil port 31 is made the same, and then under the joint action of the oil pressure on both sides, the multi-stage buffer mechanism 44 is compressed through the first piston surface 42 and the second piston surface 43 respectively, and the force of the oil pressure is gradually dispersed on the piston surface, so that the thrust of the oil pressure on the piston surface is more evenly distributed on the piston surface, effectively improving the stability of the piston adjustment device 4, and maintaining the central connecting member 41 in the cylinder body 1 to remain in a static state, and then when the connecting rod 5 is pushed out, the oil pressure input to the first oil port 21 is increased, and the oil pressure input to the second oil port 31 is reduced, and then under the interaction of the oil pressure, the pressure on the second piston surface 43 is reduced, and the pressure on the first piston surface 42 is increased, and the multi-stage buffer mechanism 44 on both sides is gradually compressed with the second piston surface 43 as the fixed surface, and at the same time, the central connecting member 41 is driven to the second piston surface 4 3 moves, thereby driving the piston adjusting device 4 as a whole to move toward the position of the right end cover 3 in the cylinder body 1, and then under the buffering effect of the buffer spring 63, the piston adjusting device 4 drives the connecting rod 5 to move smoothly on the limiting rod 61 to push the connecting rod 5 out; when the connecting rod 5 is retracted, the oil pressure input to the first oil port 21 is reduced, and the oil pressure input to the second oil port 31 is increased, and then under the interaction of the oil pressures, the pressure on the second piston surface 43 is increased, and at the same time the pressure on the first piston surface 42 is reduced, and the multi-stage buffer mechanisms 44 on both sides are gradually compressed with the first piston surface 42 as the fixed surface, and at the same time the central connecting member 41 is driven to move toward the first piston surface 42, and then the piston adjusting device 4 is driven as a whole to move toward the position of the left end cover 2 in the cylinder body 1, and then under the buffering effect of the buffer spring 63, the piston adjusting device 4 drives the connecting rod 5 to move smoothly on the limiting rod 61 to retract the connecting rod 5.

[0079] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydraulic system fluid pressure actuator, characterized in that: include: Cylinder body (1); A left end cover (2) is fixed to the left end of the cylinder body (1); A right end cover (3) is fixed to the right end of the cylinder body (1) and corresponds to the left end cover (2); A piston adjusting device (4) is slidably disposed in the cylinder body (1); A connecting rod (5) is arranged on the central axis of the cylinder body (1), fixedly connected to the piston adjustment device (4), and slidably connected to the center of the right end cover (3); The buffer assembly (6) has one end fixedly connected to the left end cover (2) and one end slidably disposed inside the connecting rod (5).

2. A hydraulic system fluid pressure actuator according to claim 1, characterized in that: The side of the left end cover (2) is provided with a first oil port (21), and the side of the right end cover (3) is provided with a second oil port (31), and the first oil port (21) and the second oil port (31) are respectively connected to the two ends of the cylinder body (1) and the external oil tank.

3. A hydraulic system fluid pressure actuator according to claim 1, characterized in that: The piston adjustment device (4) comprises: A central connecting member (41) is slidably disposed in the cylinder body (1), and a side of the central connecting member (41) close to the right end cover (3) is fixedly connected to the connecting rod (5); A first piston surface (42) is slidably disposed in the cylinder body (1) and is located on the left side of the central connecting member (41), and the center of the first piston surface (42) is slidably connected to the buffer assembly (6); A second piston surface (43) is slidably disposed in the cylinder body (1), is disposed corresponding to the first piston surface (42), is located on the right side of the central connecting member (41), and the center of the second piston surface (43) is slidably connected to the connecting rod (5); The multi-stage buffer mechanism (44) is symmetrically distributed with two groups about the central connecting member (41), and is respectively fixed on both sides of the central connecting member (41), and the multi-stage buffer mechanism (44) is respectively in contact with the corresponding first piston surface (42) and second piston surface (43).

4. A hydraulic system fluid pressure actuator according to claim 3, characterized in that: The central connecting member (41) comprises: A connecting circular surface (411) is arranged in the cylinder body (1), and is fixedly connected to the connecting rod (5) at the center of one side close to the right end cover (3), and both sides of the connecting circular surface (411) are respectively fixedly connected to corresponding multi-stage buffer mechanisms (44); A sealing ring (412) is fixed on the outer ring of the connecting circular surface (411), and the sealing ring (412) is slidably connected to the inner wall of the cylinder body (1).

5. A hydraulic system fluid pressure actuator according to claim 4, characterized in that: The multi-stage buffer mechanism (44) comprises: An external compression component (441) has one end fixedly connected to the side surface of the connecting circular surface (411) and the other end in contact with the piston surface; A plurality of internal compression components (442) are arranged in sequence from the outer side of the connecting circular surface (411) to the center, and the internal compression components (442) are arranged on the inner side of the external compression component (441). One end of the internal compression component (442) is fixedly connected to the side surface of the connecting circular surface (411), and the other end corresponds to the piston surface. The internal compression component (442) and the external compression component (441) have the same structure.

6. A hydraulic system fluid pressure actuator according to claim 5, characterized in that: The compression component comprises: A fixed annular surface (4411), fixed to the side of the connecting circular surface (411); A compression spring (4412) is fixed on a side of the fixed annular surface (4411) away from the connecting circular surface (411); A connecting ring surface (4413) is fixed to an end of the compression spring (4412) away from the fixed ring surface (4411), and the connecting ring surface (4413) corresponds to the side of the piston surface; A spacer annular surface (4414) is fixed to the inner ring of the connecting annular surface (4413), and the spacer annular surface (4414) is in contact with the adjacent compression assembly; The pushing annular surface (4415) is fixed at the inner middle part of the spacing annular surface (4414) and is parallel to the connecting annular surface (4413) in the adjacent compression assembly.

7. A hydraulic system fluid pressure actuator according to claim 6, characterized in that: The compression degree of the plurality of compression springs (4412) decreases from the outer side of the connecting circular surface (411) toward the center, and during the compression process of the compression spring (4412), each pushing annular surface (4415) must fit with the corresponding connecting annular surface (4413).

8. The hydraulic system fluid pressure actuator according to claim 3, characterized in that: The buffer component (6) comprises: A limiting rod (61), one end of which is fixedly connected to the left end cover (2), and the other end of which passes through the first piston surface (42) and the central connecting piece (41) and is arranged in the connecting rod (5); A positioning slider (62) is fixed to one end of the limiting rod (61) located inside the connecting rod (5), and the positioning slider (62) is slidably disposed inside the connecting rod (5); The buffer spring (63) is sleeved on the limiting rod (61), is located inside the connecting rod (5), and is fixedly connected to the side of the positioning slide block (62).

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