A piston connection anti-loosening structure for hydraulic cylinder

Abstract

The utility model provides a piston connection anti-loosening structure for a hydraulic cylinder, belonging to the technical field of hydraulic cylinders, comprising a piston rod and a piston arranged in a cylinder inner cavity, a rotating seat being rotatably arranged in the inner cavity of an annular base, a docking guide groove being spirally opened on the outer wall of the piston rod, and a stabilizing guide block driving the swivel seat to slide circumferentially on the inner wall of the annular base after being subjected to an acting force, and the piston rod is limitedly clamped during its extension and retraction process by stabilizing guide blocks at high and low positions on both sides, thereby ensuring the stability of the piston rod, thereby ensuring the stability of the piston located at the bottom end of the piston rod, preventing the piston rod from loosening under conditions of high pressure, vibration or frequent movement, thereby ensuring the reliability and safety of the hydraulic cylinder, and resetting the clamping joint by an elastic reset clamping assembly, thereby allowing the piston to be disengaged from the annular base through the locking seat, thereby ensuring the stable operation of the hydraulic cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a piston connection anti-loosening structure for a hydraulic cylinder. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the reduction device can be eliminated, there is no transmission gap, and the motion is smooth. Therefore, it is widely used in the hydraulic systems of various machines. The connection between the piston rod and the cylinder body becomes loose under high pressure, vibration or frequent movement. At this time, an anti-loosening component is required to ensure the reliability and safety of the hydraulic cylinder.

[0003] The related technology (publication number: CN214788317U) discloses a piston connection anti-loosening structure for a hydraulic cylinder, and the disclosed technical solution is as follows: when installing the piston and the piston rod, it is only necessary to make the hollow block and the first groove in the same plane, and align the arc block and the second groove, and then insert the hollow block into the first groove. When the arc block just starts to contact the piston, the piston will have an extrusion force on the arc block, causing the arc block to move into the hollow block. The arc block then drives the first connecting rod to move, the first connecting rod drives the vertical rod to move, the vertical rod drives the slider to move and squeeze the first spring, causing the first spring to generate elastic force. When the arc block and the second groove are in the same horizontal plane, the elastic force generated by the first spring will bounce the arc block into the second groove, so that the piston and the piston rod can be connected, and the connection is tight and will not loosen, thereby improving the stability of the piston connection of the hydraulic cylinder.

[0004] In the above disclosed technical solutions, the following problems are found in the related technologies: the hydraulic cylinder may be worn due to frequent reciprocating motion and force during long-term use. When the wear reaches a certain degree, the tightness of the piston rod will decrease, resulting in looseness. Since the piston and the piston rod are directly connected, the stability of the piston rod directly affects the stability of the piston. Therefore, it is necessary to ensure the stability of the position of the piston rod. In this regard, we propose a new type of piston connection anti-loosening structure for hydraulic cylinders.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background technology section of this application, and therefore may include prior art information that does not constitute known to ordinary technicians in the field. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology. In order to solve the problem of the stability of the piston of the hydraulic cylinder existing in the prior art, the utility model provides a piston connection anti-loosening structure for the hydraulic cylinder, which adopts a piston rod anti-deflection structure combined with a protruding stable structure to achieve the effect of preventing the piston from loosening. The specific technical solution is:

[0007] A piston connection anti-loosening structure for a hydraulic cylinder, comprising a piston rod and a piston arranged in the inner cavity of the cylinder body, an annular base is embedded in the top of the inner cavity of the cylinder body, a rotating seat is rotatably arranged in the inner cavity of the annular base, the piston is fixedly connected to the bottom end of the piston rod, a spiral docking guide groove is provided on the outer wall of the piston rod, a stabilizing guide block slidably arranged on the inner wall of the docking guide groove is fixedly connected to the inner wall of the rotating seat, a locking seat sleeved on the outside of the piston rod is provided on the top of the piston, and the locking seat is clamped with the annular base through an elastic reset clamping assembly when in contact.

[0008] In the above technical solution, the elastic reset engaging assembly includes an elastic recessed seat arranged below the annular base, and deformation grooves are evenly opened on the circumferential outer wall of the elastic recessed seat. The elastic recessed seat and the annular base are connected by elastic telescopic members evenly arranged circumferentially. The top of the locking seat is fixedly connected to a pushing seat sleeved on the outside of the piston rod, and an elastic reset lock core member connected to the deformation groove is evenly and circumferentially slidably arranged on the pushing seat.

[0009] The elastic reset lock core component includes a movable groove that is evenly arranged on the top of the pushing seat in the circumferential direction, a movable column is slidably arranged in the inner cavity of the movable groove, the movable column is connected to the inner wall of the movable groove by a spring sheet, a lock hole is evenly arranged on the outer wall of the locking seat in the circumferential direction, and a lock core that engages with the lock hole is fixedly connected to the bottom end of the movable column.

[0010] The outer wall of the movable column is symmetrically sleeved with the limiting seats, and the two limiting seats are respectively attached to the upper and lower sides of the pushing seat.

[0011] The elastic telescopic member includes an outer cylinder rotatably arranged at the bottom of the annular base, a connecting seat rotatably arranged at the top of the elastic recessed seat, a movable rod is fixedly connected to the side wall of the connecting seat, and the outer cylinder is sleeved on the outside of the movable rod, and an elastic member sleeved on the outside of the movable rod is arranged between the connecting seat and the end of the outer cylinder.

[0012] The bottom of the annular base is fixedly connected with an annular support seat which is attached to the top edge of the elastic recessed seat.

[0013] The inner wall of the annular support seat is evenly provided with circumferentially shaped clearance grooves corresponding to the outer cylinder.

[0014] Two stabilizing guide blocks with a height difference are fixedly connected to two sides of the inner wall of the rotating seat, and the two stabilizing guide blocks are symmetrically slidably arranged on the inner wall of the docking guide groove.

[0015] Ball bearings are evenly arranged circumferentially between the annular base and the rotating seat.

[0016] The movable column and the lock core are located at relatively vertical positions.

[0017] Compared with the prior art, the utility model has the following beneficial effects: the piston connection anti-loosening structure for the hydraulic cylinder:

[0018] 1. During the longitudinal sliding of the piston rod, the docking guide groove slides against the outer wall of the stabilizing guide block, so that the stabilizing guide block drives the rotating seat to slide circumferentially on the inner wall of the annular base after being subjected to the force. The stabilizing guide blocks at high and low positions on both sides limit the piston rod during its extension and retraction process, thereby ensuring the stability of the piston rod and thus ensuring the stability of the piston at the bottom of the piston rod, preventing the piston rod from loosening under high pressure, vibration or frequent movement, thereby ensuring the reliability and safety of the hydraulic cylinder.

[0019] Second, after the piston rod extends out of the cylinder body, the locking seat on the piston is clamped on the annular base through an elastic reset clamping assembly, thereby ensuring the stability of the piston position and preventing the working environment of the hydraulic cylinder from affecting the piston through the piston rod, thereby protecting the piston.

[0020] 3. When the piston rod is retracted into the cylinder body, the clamping joint is reset by the elastic reset clamping assembly, so that the piston is separated from the annular base through the locking seat, ensuring the stable working process of the hydraulic cylinder.

[0021] Fourth, the elastic telescopic member ensures that the elastic concave seat can be restored to a concave shape when the squeezing force is withdrawn. The elastic reset lock core member allows the locking seat to be separated from the pushing seat when the squeezing force is withdrawn, thereby ensuring the stability of the hydraulic cylinder during use.

[0022] 5. A certain movable space is provided between the annular support seat and the annular base. The annular support seat resists the elastic recess seat when it is subjected to force, thereby preventing the elastic recess seat from being damaged, thereby ensuring the stable progress of the piston locking process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the hydraulic cylinder used in the utility model;

[0024] Figure 2 It is a structural cross-sectional view of the cylinder body;

[0025] Figure 3 The structure diagram of the annular base and the rotating base of the utility model is shown in FIG. Figure I ;

[0026] Figure 4 The structure diagram of the annular base and the rotating base of the utility model is shown in FIG. Figure II ;

[0027] Figure 5 The structure diagram of the locking seat and the pushing seat of the utility model is shown in FIG. Figure I ;

[0028] Figure 6 The structure diagram of the locking seat and the pushing seat of the utility model is shown in FIG. Figure II ;

[0029] Figure 7 for Figure 4 A local enlarged view of point A;

[0030] in, Figures 1 to 7 The correspondence between the figure numbers and the component names is: 1-cylinder body, 2-piston rod, 3-piston, 4-annular base, 5-rotating seat, 6-docking guide groove, 7-elastic recessed seat, 8-pushing seat, 9-annular supporting seat, 10-deformation groove, 11-locking seat, 12-stable guide block, 13-ball, 14-embedded groove, 15-slide groove, 16-yield groove, 17-docking plate, 18-fixed rod, 19-outer cylinder, 20-elastic member, 21-movable rod, 22-connecting seat, 23-limiting seat, 24-movable column, 25-lock hole, 26-connecting column, 27-movable groove, 28-lock core, 29-spring. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] The following is a combination of specific implementation cases and attached Figure 1 -Attached Figure 7 The present invention is further described below, but the present invention is not limited to these embodiments.

[0033] A piston connection anti-loosening structure for a hydraulic cylinder includes a piston rod 2 and a piston 3 arranged in the inner cavity of a cylinder body 1, wherein the piston 3 is fixedly connected to the bottom end of the piston rod 2, and an annular base 4 is embedded in the top of the inner cavity of the cylinder body 1. The annular base 4 is fixedly embedded in the top of the inner wall of the cylinder body 1, so that a rotating seat 5 slides circumferentially on the inner wall of the annular base 4, and the rotating seat 5 is movably sleeved on the outside of the piston rod 2 through a mounting hole opened in the center longitudinal direction, so that the piston rod 2 slides in contact with the inner wall of the rotating seat 5. The inner cavity of the annular base 4 is rotatably provided with a rotating seat 5, and the outer wall of the piston rod 2 is spirally provided with a docking guide groove 6. A docking guide groove 6 is spirally provided on the outer wall of the piston rod 2 from bottom to top.

[0034] The inner wall of the rotating seat 5 is fixed with a stable guide block 12 slidably arranged on the inner wall of the docking guide groove 6. The shape of the stable guide block 12 is the same as the cross-sectional shape of the docking guide groove 6, so that the stable guide block 12 fits on the inner wall of the docking guide groove 6 and slides.

[0035] During the operation of the hydraulic cylinder, the piston rod 2 is telescopically moved. During the longitudinal sliding of the piston rod 2, the piston rod 2 drives the spiral docking guide groove 6 to move, so that the docking guide groove 6 slides against the outer wall of the stable guide block 12. After the stable guide block 12 is subjected to the force, it drives the rotating seat 5 to slide circumferentially on the inner wall of the annular base 4. The stable guide blocks 12 at high and low positions on both sides limit the expansion and contraction process of the piston rod 2, thereby ensuring the stability of the piston rod 2, thereby ensuring the stability of the piston at the bottom end of the piston rod 2, and preventing the piston rod 2 from loosening under high pressure, vibration or frequent movement, thereby ensuring the reliability and safety of the hydraulic cylinder.

[0036] The top of the piston 3 is provided with a locking seat 11 sleeved on the outside of the piston rod 2, and the locking seat 11 is clamped on the bottom of the annular base 4 through an elastic reset clamping assembly. After the piston rod 2 extends out of the cylinder body 1, the locking seat 11 on the piston 3 is clamped on the annular base 4 through the elastic reset clamping assembly, thereby ensuring the stability of the position of the piston 3, preventing the working environment of the hydraulic cylinder from affecting the piston 3 through the piston rod 2, and thus protecting the piston 3.

[0037] When the piston rod 2 is retracted into the cylinder body 1, the clamping joint is reset by the elastic reset clamping assembly, so that the piston 3 is separated from the annular base 4 through the locking seat 11, ensuring the stable operation of the hydraulic cylinder.

[0038] Among them, the elastic reset clamping assembly includes an elastic recessed seat 7 arranged below the annular base 4, and the circumferential outer wall of the elastic recessed seat 7 is evenly provided with a deformation groove 10. The elastic recessed seat 7 is in the shape of a funnel with a through hole in the center, that is, the elastic recessed seat 7 is a concave annular seat. When the elastic recessed seat 7 is subjected to an extrusion force, it will undergo elastic deformation, that is, it will be deformed into an annular seat with a flat surface. Since the elastic recessed seat 7 is provided with a deformation groove 10 on the circumferential outer wall, the elastic recessed seat 7 diffuses outward in the circumferential direction when it is deformed. The elastic recessed seat 7 is connected to the annular base 4 by an elastic telescopic member evenly arranged in the circumference, and the top of the locking seat 11 is fixedly connected with a pushing seat 8 sleeved on the outside of the piston rod 2, and an elastic reset lock core member corresponding to the deformation groove 10 is evenly slidably arranged in the circumference on the pushing seat 8.

[0039] The elastic retractable member ensures that the elastic recessed seat 7 can be restored to a concave shape when the extrusion force is withdrawn. When the extrusion force is withdrawn by the elastic resetting lock core member, the locking seat 11 is separated from the pushing seat 8, thereby ensuring the stability of the hydraulic cylinder during use.

[0040] It is worth noting that the elastic reset lock core component includes a movable groove 27 uniformly opened on the top of the pushing seat 8 in the circumferential direction, and a movable column 24 is slidably arranged in the inner cavity of the movable groove 27, and the movable column 24 is connected to the inner wall of the movable groove 27 by an elastic sheet 29. The movable groove 27 penetrating the inner cavity of the pushing seat 8 is opened in a circle in the circumferential direction on the top of the pushing seat 8, and the movable column 24 penetrates the inner cavity of the movable groove 27 and slides on the inner wall of the movable groove 27. When the locking seat 11 is engaged with the lock core 28, the upper end of the movable column 24 extends to the space above the elastic recessed seat 7. One end of the elastic sheet 29 is fixedly mounted on the inner wall of the movable groove 27 facing the outside, and the other end of the elastic sheet 29 is fixedly mounted on the outer wall of the movable column 24. That is, the elastic sheet 29 is located inside the movable groove 27.

[0041] The outer wall of the locking seat 11 is evenly provided with lock holes 25 in the circumferential direction, and the bottom end of the movable column 24 is fixedly connected with a lock core 28 engaged with the lock hole 25. The locking seat 11 is connected to the pushing seat 8 through a plurality of circumferential connecting columns 26, so that the lock core 28 has a certain movable space. When the pushing seat 8 moves along with the piston 3 through the locking seat 11, when the pushing seat 8 pushes the elastic recessed seat 7 to move, the deformation groove 10 spreads outward, so that the inner wall of the deformation groove 10 pushes the movable column 24 to slide on the inner wall of the movable groove 27, so that the movable column 24 drives the lock core 28 to be engaged with the corresponding lock hole 25, and at this time, the spring piece 29 is subjected to the extrusion force to generate elastic force.

[0042] When the piston rod 2 is retracted into the cylinder body 1, the pushing seat 8 is moved away from the bottom of the elastic recessed seat 7 along with the piston 3 through the locking seat 11. At this time, the elastic recessed seat 7 is restored to a concave shape through elastic deformation, so that the inner wall of the deformation groove 10 is moved away from the movable column 24. At this time, the elastic force of the spring piece 29 drives the lock core 28 to move away from the lock hole 25 through the movable column 24, thereby achieving unlocking.

[0043] The outer wall of the movable column 24 is symmetrically sleeved with the limit seats 23, and the two limit seats 23 are respectively fitted on the upper and lower sides of the pushing seat 8. The two limit seats 23 are respectively fixedly sleeved on the outside of the movable column 24 through the mounting holes opened in the center, and the two limit seats 23 are respectively fitted on the top and bottom of the pushing seat 8 to slide. The stability of the sliding direction of the movable column 24 is ensured by the two limit seats 23, and the sliding direction of the movable column 24 is prevented from deviating, thereby ensuring the accuracy of the engagement of the lock core 28 with the lock hole 25.

[0044] In addition, the elastic telescopic member includes an outer cylinder 19 rotatably arranged at the bottom of the annular base 4, and a connecting seat 22 is rotatably arranged at the top of the elastic recessed seat 7. A docking plate 17 is fixedly installed at the bottom of the annular base 4, and a bracket is fixedly installed at the bottom of the docking plate 17 and the top of the elastic recessed seat 7. A rotating shaft is installed in the bracket, and the closed end of the outer cylinder 19 is sleeved on the outside of the rotating shaft through the mounting hole opened by the connecting member, and the connecting seat 22 is sleeved on the outside of another rotating shaft through the opening mounting hole. The outer cylinder 19 is fitted on the outer wall of the movable rod 21 to telescopically slide, so that the two ends of the telescopic rod body formed by the outer cylinder 19 and the movable rod 21 are respectively hinged to the docking plate 17 and the elastic recessed seat 7.

[0045] The movable rod 21 is fixedly connected to the side wall of the connecting seat 22, and the outer cylinder 19 is sleeved on the outside of the movable rod 21. An elastic member 20 sleeved on the outside of the movable rod 21 is provided between the connecting seat 22 and the end of the outer cylinder 19. The elastic member 20 can be a compression spring, and the two ends of the elastic member 20 are respectively fixed to the opposite surfaces of the connecting seat 22 and the outer cylinder 19, and the elastic member 20 is fitted on the outer wall of the movable rod 21 to telescopically slide. The elastic force of the elastic member 20 and the telescopic sliding of the outer cylinder 19 and the movable rod 21 ensure the stability of the position of the elastic recessed seat 7 before and after deformation.

[0046] The bottom of the annular base 4 is fixedly connected with an annular support seat 9 which is attached to the top edge of the elastic recess seat 7. The annular support seat 9 is connected to the annular base 4 by a plurality of fixing rods 18 in the circumferential direction, so that a certain movable space is spaced between the annular support seat 9 and the annular base 4.

[0047] The annular support seat 9 resists the elastic recessed seat 7 when it is subjected to force, thereby preventing the elastic recessed seat 7 from being damaged, thereby ensuring the stable locking process of the piston 3.

[0048] The inner wall of the annular support seat 9 is evenly provided with a clearance groove 16 corresponding to the outer cylinder 19. The clearance groove 16 on the annular support seat 9 prevents the annular support seat 9 from interfering with the movable space of the outer cylinder 19 and the movable rod 21.

[0049] In addition, two stabilizing guide blocks 12 with a height difference are fixedly connected to both sides of the inner wall of the rotating seat 5 , and the two stabilizing guide blocks 12 are symmetrically slidably arranged on the inner wall of the docking guide groove 6 .

[0050] According to the height positions on both sides of the spiral docking guide groove 6, the two stabilizing guide blocks 12 are set at different heights. The stabilizing guide blocks 12 on both sides limit the sliding process of the piston rod 2 to ensure the stability of the movement process of the piston rod 2, thereby ensuring the stability of the piston.

[0051] Furthermore, balls 13 are evenly arranged circumferentially between the annular base 4 and the rotating seat 5. A sliding groove 15 is provided on the circumferential inner wall of the annular base 4, and a embedding groove 14 is provided on the outer wall of the rotating seat 5 in turn. Balls 13 are movably embedded in the movable cavity formed by each embedding groove 14 and the sliding groove 15. The stability of the rotating seat 5 during rotation is ensured by the balls 13 in one circle, thereby ensuring the stability of the piston rod 2 driving the piston 3 to extend and slide.

[0052] The movable column 24 is in a relatively vertical position with the lock core 28. The lock core 28 and the movable column 24 form an L-shaped member, which ensures that the moving direction of the lock core 28 is the same as that of the lock hole 25, thereby ensuring the accuracy of the locking and engaging process.

[0053] The present embodiment is a piston connection anti-loosening structure for a hydraulic cylinder, and the working principle is as follows: during the operation of the hydraulic cylinder, the piston rod 2 is telescopically moved. During the longitudinal sliding of the piston rod 2, the piston rod 2 drives the spiral docking guide groove 6 to move, so that the docking guide groove 6 slides against the outer wall of the stable guide block 12, and the stable guide block 12 drives the rotating seat 5 to slide circumferentially on the inner wall of the annular base 4 after receiving the force. The piston rod 2 is limited and clamped during the telescopic process by the stable guide blocks 12 at high and low positions on both sides.

[0054] In the process of the pushing seat 8 moving with the piston 3 through the locking seat 11, when the pushing seat 8 pushes the elastic recessed seat 7 to move, the deformation groove 10 spreads outward, so that the inner wall of the deformation groove 10 pushes the movable column 24 to slide on the inner wall of the movable groove 27, so that the movable column 24 drives the lock core 28 to be clamped in the corresponding lock hole 25. At this time, the spring piece 29 is subjected to the extrusion force to generate elastic force.

[0055] When the piston rod 2 is retracted into the cylinder body 1, the pushing seat 8 is moved away from the bottom of the elastic recessed seat 7 along with the piston 3 through the locking seat 11. At this time, the elastic recessed seat 7 is restored to a concave shape through elastic deformation, so that the inner wall of the deformation groove 10 is moved away from the movable column 24. At this time, the elastic force of the spring piece 29 drives the lock core 28 to move away from the lock hole 25 through the movable column 24, thereby achieving unlocking.

[0056] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0058] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A piston connection anti-loosening structure for a hydraulic cylinder, comprising a piston rod (2) and a piston (3) arranged in an inner cavity of a cylinder body (1), characterized in that: An annular base (4) is embedded in the top of the inner cavity of the cylinder body (1), a rotating seat (5) is rotatably arranged in the inner cavity of the annular base (4), a spiral docking guide groove (6) is provided on the outer wall of the piston rod (2), a stabilizing guide block (12) slidably arranged on the inner wall of the docking guide groove (6) is fixedly connected to the inner wall of the rotating seat (5), a locking seat (11) sleeved on the outside of the piston rod (2) is arranged on the top of the piston (3), and the locking seat (11) is engaged with the annular base (4) through an elastic reset clamping assembly when the locking seat (11) contacts the annular base (4).

2. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 1, characterized in that: The elastic reset engaging assembly comprises an elastic recessed seat (7) arranged below the annular base (4), and deformation grooves (10) are evenly provided on the circumferential outer wall of the elastic recessed seat (7), the elastic recessed seat (7) and the annular base (4) are connected via elastic telescopic components evenly provided circumferentially, the top of the locking seat (11) is fixedly connected to a pushing seat (8) sleeved on the outside of the piston rod (2), and an elastic reset lock core component is evenly provided circumferentially on the pushing seat (8) and is connected to the deformation groove (10).

3. The anti-loosening structure for piston connection of a hydraulic cylinder according to claim 2, characterized in that: The elastic reset lock core component comprises a movable groove (27) uniformly arranged on the top of the pushing seat (8) in the circumferential direction, a movable column (24) is slidably arranged in the inner cavity of the movable groove (27), the movable column (24) is connected to the inner wall of the movable groove (27) by a spring sheet (29), a lock hole (25) is uniformly arranged on the outer wall of the locking seat (11), and a lock core (28) engaged with the lock hole (25) is fixedly connected to the bottom end of the movable column (24).

4. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 3, characterized in that: The outer wall of the movable column (24) is symmetrically sleeved with the limit seats (23), and the two limit seats (23) are respectively fitted on the upper and lower sides of the pushing seat (8).

5. The anti-loosening structure for piston connection of a hydraulic cylinder according to claim 2, characterized in that: The elastic telescopic member comprises an outer cylinder (19) rotatably arranged at the bottom of the annular base (4); a connecting seat (22) is rotatably arranged at the top of the elastic recessed seat (7); a movable rod (21) is fixedly connected to the side wall of the connecting seat (22); the outer cylinder (19) is sleeved on the outside of the movable rod (21); and an elastic member (20) sleeved on the outside of the movable rod (21) is arranged between the connecting seat (22) and the end of the outer cylinder (19).

6. The anti-loosening structure for piston connection of a hydraulic cylinder according to claim 5, characterized in that: The bottom of the annular base (4) is fixedly connected to an annular support seat (9) which is fitted on the top edge of the elastic recessed seat (7).

7. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 6, characterized in that: The inner wall of the annular support seat (9) is evenly provided with clearance grooves (16) corresponding to the outer cylinder (19) in the circumferential direction.

8. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 1, characterized in that: Two stabilizing guide blocks (12) with a height difference are fixedly connected to two sides of the inner wall of the rotating seat (5), and the two stabilizing guide blocks (12) are symmetrically slidably arranged on the inner wall of the docking guide groove (6).

9. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 1, characterized in that: Balls (13) are evenly arranged in the circumferential direction between the annular base (4) and the rotating seat (5).

10. The piston connection anti-loosening structure for a hydraulic cylinder according to claim 3, characterized in that: The movable column (24) and the lock core (28) are located at relatively vertical positions.

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