A shock-protected hydraulic system

Abstract

The present application relates to the technical fields of hydraulic cylinder, in particular to an anti-impact hydraulic system, comprising a hydraulic cylinder and a piston rod movably arranged on the top of the hydraulic cylinder, characterized in that the hydraulic cylinder is provided with a fixing frame for preventing the piston rod from being impacted and falling, the piston rod is provided with an L-shaped moving plate movably arranged in the fixing frame, and a pushing assembly is arranged in the fixing frame and cooperates with the L-shaped moving plate to move, wherein the cleaning barrel is used to blow the blowing seat on the fixing frame, the blowing assembly is used to clean the top of the hydraulic cylinder, the blowing cleaning is performed on the connection between the top of the hydraulic cylinder and the piston rod at intervals, so that the sealing element on the top of the hydraulic cylinder is less damaged, and the L-shaped moving plate and the limiting clamping groove are cleaned by the cleaning assembly, the cleaning brush on the outer periphery of the rotating barrel is used to sweep the L-shaped moving plate and the limiting clamping groove, and the dust in the limiting clamping groove is cleaned, so that the limiting clamping block is more stable when entering the limiting clamping groove.

Description

Technical Field

[0001] This invention relates to the field of hydraulic cylinder technology, and in particular to an anti-shock hydraulic system. Background Technology

[0002] Hydraulic cylinder lifting is a technology that uses the principle of hydraulic system to lift heavy objects by the thrust of a hydraulic cylinder. Hydraulic oil enters the cylinder body and pushes the piston to move, generating thrust and lifting the load. It is a hydraulic actuator that converts hydraulic energy into mechanical energy and makes linear reciprocating motion. In industrial systems, hydraulic cylinder lifting devices are very common mechanical equipment used in various industries.

[0003] Currently, hydraulic cylinders are used for loading and unloading. However, frequent lifting and lowering actions can lead to oil leaks in the hydraulic cylinders. Damage to the seals inside the hydraulic cylinders reduces their sealing performance, causing the lifted objects to fall rapidly due to loss of support, resulting in damage from the fall. During loading and unloading in factories, hydraulic cylinders are exposed to a large amount of dust. Dust accumulates at the connection between the top of the hydraulic cylinder and the piston rod. Over time, this dust enters the moving parts of the piston rod and hydraulic cylinder. Dust adhering to the bottom of the piston rod can damage the seals at the top of the hydraulic cylinder, leading to oil leaks. In addition, operating the hydraulic cylinders in dusty environments can also cause dust to accumulate in the grooves of the impact and fall protection structure. If the dust in the grooves is not cleaned in time, the depth to which the locking block enters the groove will decrease, resulting in unstable limiting of the anti-fall impact by the locking block and groove, thus reducing the protective performance against the rapidly descending piston rod. Summary of the Invention

[0004] To overcome the shortcomings of the prior art, the present invention provides an anti-shock hydraulic system.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an anti-impact hydraulic system, comprising a hydraulic cylinder and a piston rod movable at the top of the hydraulic cylinder, wherein the hydraulic cylinder is equipped with a fixed frame to prevent the piston rod from impacting and falling, and the piston rod is equipped with an L-shaped moving plate that movably passes through the fixed frame, and a toggle assembly that moves in coordination with the L-shaped moving plate is provided inside the fixed frame, wherein the L-shaped moving plate toggles the triangular trigger block inside the toggle assembly during the lifting and lowering movement;

[0006] The fixed frame is equipped with a limiting component for the rapid descent of the L-shaped moving plate. The limiting block in the limiting component can limit and lock the L-shaped moving plate as it descends rapidly. The triangular trigger block is equipped with an arc-shaped gear plate that drives the limiting block to move outward. The fixed frame is equipped with a blower assembly for cleaning the top of the hydraulic cylinder. The arc-shaped gear plate drives the piston rod in the blower assembly to move up and down. The bottom of the fixed frame is equipped with a cleaning assembly for cleaning the L-shaped moving plate, and the cleaning assembly includes a rotating cylinder that moves at the bottom of the fixed frame.

[0007] As a preferred embodiment of the present invention, the L-shaped motion plate is equipped with an arc-shaped motion rod, and the L-shaped motion plate has a limiting slot that matches the size of the limiting block. The L-shaped motion plate moves within a fixing hole in the fixing frame. The limiting component also includes a fixing seat installed at the bottom of the fixing frame. A fixing shaft is movably mounted on the top of the fixing seat. Triangular trigger blocks are movably mounted at both ends of the fixing shaft. Arc-shaped gear discs are movably connected to the outside of the triangular trigger blocks. A torsion spring is provided between the triangular trigger blocks and the fixing seat, and the torsion spring moves to the outside of the fixing shaft. A limiting base is installed at the bottom of the fixing frame, and a rack plate that meshes with the arc-shaped gear disc is movably connected to the limiting base.

[0008] As a preferred embodiment of the present invention, a support frame is fixedly installed between the tops of the rack plates. A limiting base plate is installed on the top of the fixed frame. A first sliding groove is opened at the bottom of the limiting base plate. A first slider is slidably connected to the first sliding groove. A pushing block is installed at the bottom of the first slider. The pushing block has an inclined groove. A pushing rod that moves in the inclined groove is installed on the top of the support frame. A limiting block is installed on the pushing block, and the top of the limiting block moves in the limiting groove. A telescopic spring is fixedly installed at the end of the pushing block away from the limiting block, and the telescopic spring is installed on the inner wall of the fixed frame. A second sliding groove is opened on the side of the limiting base near the arc-shaped gear plate. A second slider is slidably connected to the limiting base in the second sliding groove. The second slider is fixedly installed on the rack plate. A counterweight is fixedly installed at the bottom of the arc-shaped gear plate. A limiting support block for limiting and supporting the counterweight is installed on the inner side wall of the fixed frame.

[0009] As a preferred embodiment of the present invention, the blower assembly further includes a cleaning cylinder fixedly installed at the top of the fixed frame. A blower seat with a nozzle is fixedly installed on the top of the fixed frame near the piston rod. A piston plate is movably arranged inside the cleaning cylinder. A movable rod is fixedly installed at the bottom center of the piston plate. The bottom of the movable rod extends through to the bottom outside of the cleaning cylinder. The bottom end of the movable rod is fixedly installed at the top of the support frame. An air outlet pipe is opened at the top of the cleaning cylinder and is connected to the blower seat. An L-shaped air inlet pipe is connected to the top of the cleaning cylinder. The inlet of the L-shaped air inlet pipe is located on the side of the fixed frame away from the hydraulic cylinder. Both the air outlet pipe and the L-shaped air inlet pipe are equipped with one-way valves.

[0010] As a preferred embodiment of the present invention, the cleaning assembly further includes a cleaning brush installed at the bottom of the rotating cylinder. The cleaning brush is made of plastic and moves against a limiting slot provided in the L-shaped moving plate. A connecting rod is fixedly installed at the bottom of the support frame, and the bottom of the connecting rod extends through into the rotating cylinder. A rotating rod is fixedly installed at the bottom of the connecting rod. The rotating cylinder has an arc-shaped rotating groove that matches the size of the rotating rod, and the rotating rod moves within the arc-shaped rotating groove. An arc-shaped protective cover is fixedly installed at the bottom of the fixed frame on the side away from the hydraulic cylinder, and both the rotating cylinder and the cleaning brush move within the arc-shaped protective cover. A support base is fixedly installed at the bottom of the hydraulic cylinder, and a communicating vessel is fixedly installed at the bottom of the hydraulic cylinder. An oil pipe for injecting oil into the hydraulic cylinder is connected to the communicating vessel.

[0011] Compared with the prior art, the beneficial effects that this invention can achieve are:

[0012] 1. In this invention, the cleaning cylinder blows air onto the blower seat on the fixed frame, and the blower assembly cleans the dust on the top of the hydraulic cylinder. The connection between the top of the hydraulic cylinder and the piston rod is cleaned by intermittent blowing, which reduces damage to the seals on the top of the hydraulic cylinder. In addition, the cleaning assembly cleans the L-shaped moving plate and the limit slot, and the cleaning brush on the outer periphery of the rotating cylinder sweeps away the dust from the L-shaped moving plate and the limit slot, cleaning the dust in the limit slot, so that the limit block is more stable when it enters the limit slot.

[0013] 2. In this invention, the dust in the L-shaped moving plate and the limiting slot is cleaned by the cleaning brush on the outer periphery of the rotating cylinder, so that the dust accumulated inside the limiting slot is swept away, and the limiting block can enter the deepest part of the limiting slot during the subsequent blocking process of the piston rod, thereby improving the limiting support effect of the limiting block on the limiting slot.

[0014] 3. In this invention, during the rapid descent of the piston rod, the arc-shaped motion rod contacts the triangular trigger block and rotates. The triangular trigger block drives the arc-shaped gear disk to rotate synchronously. If the arc-shaped gear disk does not reset in time after rotation, it will jam the arc-shaped motion rod. The other end of the arc-shaped gear disk is blocked by the limiting support block, thus jamming the rapidly descending piston rod. The arc-shaped gear disk, in conjunction with the arc-shaped motion rod and the limiting support block, provides a first-level limiting support for the rapidly descending piston rod, improving the safety performance of the rapid descent of the piston rod.

[0015] 4. In this invention, the piston plate inside the cleaning cylinder is driven to move downward by the lowering of the support frame and the piston rod, which generates negative pressure inside the cleaning cylinder. Clean air is then injected into the cleaning cylinder through the L-shaped air inlet pipe. When the support frame rises, the piston plate inside the cleaning cylinder is driven to rise by the piston rod, generating positive pressure inside the cleaning cylinder. The gas inside the cleaning cylinder is then injected into the blower seat through the air outlet pipe. The nozzle on the blower seat is used to perform intermittent air blowing cleaning on the top of the hydraulic cylinder. The driving force of the descending piston rod is used to achieve a linkage cleaning effect. The design is reasonable and ingenious.

[0016] 5. In this invention, the arc-shaped motion rod on the L-shaped motion plate contacts the triangular trigger block under the action of the fixed rotating shaft and the torsion spring. The triangular trigger block rotates, and the rotation of the triangular trigger block drives the arc-shaped toothed disk to rotate synchronously. After the arc-shaped motion rod disengages from the triangular trigger block, the arc-shaped toothed disk achieves a reset motion under the gravity of the counterweight, ensuring the stable motion state of the piston rod under normal working conditions.

[0017] 6. In this invention, the push rod carries the push block to achieve horizontal movement under the action of the limiting base plate, the first sliding groove and the first slider. The limiting block on the push block enters the limiting slot of the L-shaped motion plate to limit and lock the piston rod, providing secondary limiting protection for the rapidly descending piston rod, improving the safety performance of the piston rod operation, and the structure is simple and stable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the hydraulic cylinder of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the fixing frame of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the L-shaped motion plate of the present invention;

[0022] Figure 5 This is a schematic diagram of the arc-shaped toothed disk of the present invention;

[0023] Figure 6 This is a schematic diagram of the rack plate of the present invention;

[0024] Figure 7 This is a schematic diagram of the support frame of the present invention;

[0025] Figure 8 This is a schematic diagram of the triangular trigger block of the present invention;

[0026] Figure 9 This is a schematic diagram of the structure of the fixing base of the present invention;

[0027] Figure 10 This is a schematic diagram of the cleaning cylinder of the present invention;

[0028] Figure 11 This is a schematic diagram of the connecting rod of the present invention;

[0029] Figure 12 This is a schematic diagram of the rotating cylinder of the present invention.

[0030] Among them: 10. Hydraulic cylinder; 11. Piston rod; 12. L-shaped moving plate; 13. Arc-shaped moving rod; 14. Limiting slot; 15. Support base; 16. Communicating vessel; 17. Oil pipe; 18. Fixing hole; 20. Fixing frame; 21. Triangular trigger block; 22. Fixing seat; 23. Fixing shaft; 24. Torsion spring; 25. Arc-shaped gear plate; 26. Counterweight; 27. Limiting support block; 30. Limiting base; 31. Rack plate; 32. Second slide groove; 33. The... 34. Sliding block; 40. Support frame; 41. Limiting base plate; 42. First sliding groove; 43. First sliding block; 44. Pushing block; 45. Inclined groove; 46. Pushing rod; 47. Limiting block; 50. Telescopic spring; 51. Cleaning cylinder; 52. Blower seat; 53. Piston plate; 54. Air outlet pipe; 55. L-shaped air inlet pipe; 60. Movable rod; 61. Rotating cylinder; 62. Cleaning brush; 63. Connecting rod; 64. Rotating rod; 65. Arc-shaped rotating groove; 66. Arc-shaped protective cover. Detailed Implementation

[0031] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0032] Example: Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the device includes a hydraulic cylinder 10 and a piston rod 11 movable at the top of the hydraulic cylinder 10. The hydraulic cylinder 10 is equipped with a fixed frame 20 to prevent the piston rod 11 from impacting or falling. An L-shaped moving plate 12 is mounted on the piston rod 11 and movably passes through the fixed frame 20. A toggle assembly that moves in conjunction with the L-shaped moving plate 12 is provided inside the fixed frame 20. During the lifting and lowering motion, the L-shaped moving plate 12 actuates the triangular trigger block 21 within the toggle assembly. The toggle assembly enables the triangular trigger block 21 to reciprocate during the upward movement of the L-shaped moving plate 12. When the arc-shaped moving rod 13 disengages from the triangular trigger block 21, it resets. A limit assembly for the rapid descent of the L-shaped moving plate 12 is provided inside the fixed frame 20. The limiting component includes a limiting block 46 that can limit and lock the L-shaped moving plate 12 that is rapidly removed from the frame. The triangular trigger block 21 is equipped with an arc-shaped gear plate 25 that drives the limiting block 46 to move outward. The arc-shaped gear plate 25 only rotates when the L-shaped moving plate 12 is descending, driven by the arc-shaped moving rod 13. The arc-shaped gear plate 25 does not rotate when the piston rod 11 is rising. The fixed frame 20 is equipped with a blower assembly for cleaning the top of the hydraulic cylinder 10. The arc-shaped gear plate 25 drives the piston rod 11 in the blower assembly to move up and down. The bottom of the fixed frame 20 is equipped with a cleaning assembly for cleaning the L-shaped moving plate 12, and the cleaning assembly includes a rotating cylinder 60 that moves at the bottom of the fixed frame 20.

[0033] The triangular trigger block 21 achieves stable reset during the upward motion. During normal descent, it is reset through the arc-shaped toothed disc 25 and the counterweight block 26. During rapid descent, the triangular trigger block 21, together with the arc-shaped toothed disc 25, provides limiting support for the arc-shaped motion rod 13 on the L-shaped motion plate 12, preventing the piston rod 11 from impacting during rapid descent. The blower assembly can clean the top of the hydraulic cylinder 10 of dust. Intermittent blower cleaning effectively prevents dust from entering the interior of the hydraulic cylinder 10 and effectively prevents damage to the top seal of the hydraulic cylinder 10.

[0034] See Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9The L-shaped motion plate 12 is equipped with an arc-shaped motion rod 13. The L-shaped motion plate 12 has a limiting groove 14 that matches the size of the limiting block 46. When the limiting block 46 enters the limiting groove 14, it limits and blocks the rapidly descending piston rod 11, preventing the piston rod 11 from descending rapidly and causing significant safety hazards. The L-shaped motion plate 12 moves within the fixing hole 18 of the fixing frame 20. The limiting assembly also includes a fixing seat 22 installed at the bottom of the fixing frame 20. A fixing shaft 23 is movably mounted on the top of the fixing seat 22. The shaft 23 can achieve stable and smooth rotational movement at the top of the fixed seat 22, thereby enabling the triangular trigger block 21 to cooperate with the arc-shaped motion rod 13 to trigger the movement. The triangular trigger block 21 is movable at both ends of the fixed rotating shaft 23. Arc-shaped gear disks 25 are movably connected to the outside of the triangular trigger block 21. A torsion spring 24 is provided between the triangular trigger block 21 and the fixed seat 22, and the torsion spring 24 is movable on the outside of the fixed rotating shaft 23. A limit base 30 is installed at the bottom of the fixed frame 20. A rack plate 31 that is movably meshed with the arc-shaped gear disk 25 is movably connected to the limit base 30.

[0035] When the piston rod 11 rises, the arc-shaped moving rod 13 on the L-shaped moving plate 12 triggers the triangular trigger block 21. After the triggering is completed, the triangular trigger block 21 is reset under the action of the fixed rotating shaft 23 and the torsion spring 24. When the piston rod 11 falls, the arc-shaped moving rod 13 on the L-shaped moving plate 12 triggers the triangular trigger block 21 to rotate the arc-shaped gear plate 25. During the rotation, the arc-shaped gear plate 25 engages and drives the rack plate 31 connected to the limiting base 30 to move.

[0036] See Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 12A support frame 34 is fixedly installed between the tops of the rack plates 31. A limiting base plate 40 is installed on the top of the fixed frame 20. A first sliding groove 41 is opened at the bottom of the limiting base plate 40. A first slider 42 is slidably connected to the first sliding groove 41. A pushing block 43 is installed at the bottom of the first slider 42, making the pushing block 43 more stable and smooth during the back-and-forth movement. This allows the limiting block 46 on the pushing block 43 to enter the limiting slot 14. The pushing block 43 has an inclined groove 44. A pushing rod 45 that moves in the inclined groove 44 is installed on the top of the support frame 34. The limiting block 46 is installed on the pushing block 43, and the top of the limiting block 46 moves in the limiting slot 14. 3. A telescopic spring 47 is fixedly installed at the end away from the limiting block 46, and the telescopic spring 47 is installed on the inner wall of the fixed frame 20. The limiting base 30 has a second slide groove 32 on the side near the arc-shaped toothed disc 25. The limiting base 30 is slidably connected to the second slide groove 32. The second slide groove 33 is fixedly installed on the rack plate 31. A counterweight 26 is fixedly installed at the bottom of the arc-shaped toothed disc 25. During normal descent, the counterweight 26 drives the arc-shaped toothed disc 25 to perform a reset movement. A limiting support block 27 is installed on the inner side wall of the fixed frame 20 to limit and support the counterweight 26. The limiting support block 27 limits and supports the arc-shaped toothed disc 25 after it is flipped.

[0037] When the rack plate 31 moves, it drives the push rod 45 on the support frame 34 to move up and down synchronously. When the rack plate 31 moves up and down normally with the arc-shaped gear plate 25, the movement amplitude of the push rod 45 is relatively small. Similarly, the movement amplitude of the push rod 45 driving the push block 43 is also relatively small. When the push rod 45 moves in the inclined groove 44, it will drive the push block 43 under the action of the limiting base plate 40, the first sliding groove 41 and the first slider 42. When the rack plate 31 rises to a relatively large amplitude, the support frame 34 drives the push rod 45 to rise to the top in the inclined groove 44. At this time, the push block 43 is in the first sliding groove 41 and the first sliding groove 42. Under the action of block 42, the ejection movement pushes block 43 to drive the limiting block 46 into the limiting slot 14 of the L-shaped motion plate 12. When the rack plate 31 meshes with the arc-shaped gear plate 25, the second slider 33, in conjunction with the second sliding groove 32, enables the rack plate 31 to move stably and smoothly. When the piston rod 11 descends normally, the counterweight block 26 under the arc-shaped gear plate 25 can drive the arc-shaped gear plate 25 to reset. When the piston rod 11 descends rapidly, the arc-shaped gear plate 25 drives the counterweight block 26 to limit the movement at the bottom of the limiting support block 27. The arc-shaped gear plate 25 is used to limit and support the arc-shaped motion rod 13 of the L-shaped motion plate 12.

[0038] See Figure 1 , Figure 5 , Figure 6 and Figure 10The blower assembly also includes a cleaning cylinder 50 fixedly installed at the top of the mounting bracket 20. A blower head 51 with a nozzle is fixedly installed on the top of the mounting bracket 20 near the piston rod 11. A piston plate 52 is movably disposed inside the cleaning cylinder 50. A movable rod 55 is fixedly installed at the bottom center of the piston plate 52. The bottom of the movable rod 55 extends through to the bottom outer side of the cleaning cylinder 50. The bottom end of the movable rod 55 is fixedly installed at the top of the support frame 34. An air outlet pipe 53 is provided at the top of the cleaning cylinder 50. The air outlet pipe 53 is connected to the blower seat 51, and the top of the cleaning cylinder 50 is connected to an L-shaped air inlet pipe 54. The inlet of the L-shaped air inlet pipe 54 is located on the side of the fixed frame 20 away from the hydraulic cylinder 10. Both the air outlet pipe 53 and the L-shaped air inlet pipe 54 are equipped with one-way valves. The air outlet pipe 53, in conjunction with the one-way valve, can only inject air into the blower seat 51 to achieve the cleaning effect. The L-shaped air inlet pipe 54, in conjunction with the one-way valve, can only inject air into the cleaning cylinder 50 to clean the dust on the top of the hydraulic cylinder 10.

[0039] During the normal descent of the piston rod 11, the arc-shaped gear plate 25 drives the rack plate 31 to reciprocate. The rack plate 31 drives the support frame 34 to move synchronously. The support frame 34 drives the piston plate 52 on the piston rod 11 to move up and down inside the cleaning cylinder 50. When the piston plate 52 in the cleaning cylinder 50 descends, it generates negative pressure inside. Cleaning gas is injected into the cleaning cylinder 50 through the L-shaped air inlet pipe 54. When the piston plate 52 rises, it generates positive pressure inside. Air is blown into the blower seat 51 through the air outlet pipe 53. The blower seat 51 is used to clean the top of the hydraulic cylinder 10.

[0040] See Figure 2 , Figure 5 , Figure 6 , Figure 11 and Figure 12 The cleaning assembly also includes a cleaning brush 61 installed at the bottom of the rotating cylinder 60. The cleaning brush 61 is made of plastic and moves against the limiting slot 14 provided in the L-shaped moving plate 12. A connecting rod 62 is fixedly installed at the bottom of the support frame 34. The bottom of the connecting rod 62 extends through into the rotating cylinder 60. A rotating rod 63 is fixedly installed at the bottom of the connecting rod 62. The rotating cylinder 60 has an arc-shaped rotating groove 64 that matches the size of the rotating rod 63. The rotating rod 63 moves in the arc-shaped rotating groove 64. An arc-shaped protective cover 65 is fixedly installed at the bottom of the fixed frame 20 on the side away from the hydraulic cylinder 10. Both the rotating cylinder 60 and the cleaning brush 61 move in the arc-shaped protective cover 65. A support base 15 is fixedly installed at the bottom of the hydraulic cylinder 10. A communicating vessel 16 is fixedly installed at the bottom of the hydraulic cylinder 10. An oil pipe 17 for injecting oil into the hydraulic cylinder 10 is connected to the communicating vessel 16.

[0041] During the normal descent of the piston rod 11, the arc-shaped gear plate 25 drives the rack plate 31 to reciprocate. The rack plate 31 drives the support frame 34 to move synchronously. The support frame 34 drives the connecting rod 62 to move up and down inside the rotating cylinder 60. The rotating rod 63 under the connecting rod 62 moves in the arc-shaped rotating groove 64, driving the rotating cylinder 60 to rotate. The cleaning brush 61 on the outer periphery of the rotating cylinder 60 cleans the dust in the L-shaped moving plate 12 and the limiting groove 14, effectively preventing the dust from accumulating inside the limiting groove 14 and effectively preventing the subsequent limiting block 46 from entering the limiting groove 14 to a lower depth, which would reduce the limiting support effect of the limiting block 46 on the limiting groove 14. The communicating vessel 16 ensures the flow and pressure distribution of the hydraulic oil in the hydraulic cylinder 10.

[0042] Working principle: See Figure 2 , Figure 3 , Figure 4 and Figure 5 When the piston rod 11 moves upward at the top of the hydraulic cylinder 10, the piston rod 11 drives the L-shaped moving plate 12 to move upward in the fixing hole 18 of the fixing frame 20. During the upward movement of the L-shaped moving plate 12, the arc-shaped moving rod 13 contacts the triangular trigger block 21. The triangular trigger block 21 rotates on the fixed rotating shaft 23. After the L-shaped moving plate 12 drives the arc-shaped moving rod 13 to rise, the triangular trigger block 21 is reset under the action of the torsion spring 24.

[0043] See Figure 4 , Figure 5 , Figure 6 and Figure 7 When the piston rod 11 descends from the top of the hydraulic cylinder 10, it drives the L-shaped motion plate 12 and the arc-shaped motion rod 13 to descend within the fixed frame 20. During normal descent, the arc-shaped motion rod 13 on the L-shaped motion plate 12 contacts the triangular trigger block 21 under the action of the fixed rotating shaft 23 and the torsion spring 24. The triangular trigger block 21 rotates, and this rotation drives the arc-shaped gear disk 25 to rotate synchronously. The arc-shaped motion rod 13 and the triangular trigger block... After 21 is disengaged, the arc-shaped gear disk 25 achieves a reset motion under the gravity of the counterweight block 26. When the piston rod 11 descends rapidly, the arc-shaped motion rod 13 contacts the triangular trigger block 21 and rotates. The triangular trigger block 21 drives the arc-shaped gear disk 25 to rotate synchronously. If the arc-shaped gear disk 25 fails to reset in time after rotation, it will jam the arc-shaped motion rod 13. The other end of the arc-shaped gear disk 25 is blocked by the limiting support block 27, which jams the rapidly descending piston rod 11.

[0044] See Figure 8 , Figure 9 , Figure 10 , Figure 11 and Figure 12During the normal descent of the piston rod 11, the arc-shaped gear plate 25 reciprocates normally. During the rotation, the arc-shaped gear plate 25 drives the rack plate 31 on the limiting base 30 to move up and down under the action of the second slide groove 32 and the second slider 33. During the up and down movement of the rack plate 31, the support frame 34 moves. When the support frame 34 is descending, the descending support frame 34 drives the piston plate 52 in the cleaning cylinder 50 to move down through the piston rod 11. At this time, a negative pressure is generated inside the cleaning cylinder 50, and clean air is injected into the cleaning cylinder 50 through the L-shaped air inlet pipe 54. When the support frame 34 is rising, the rising support frame 34 drives the piston plate 52 in the cleaning cylinder 50 to move up through the piston rod 11. At this time, a positive pressure is generated inside the cleaning cylinder 50, and the gas in the cleaning cylinder 50 is injected into the blower seat 51 through the air outlet pipe 53. The nozzle on the blower seat 51 is used to clean the top of the hydraulic cylinder 10 by intermittent blowing.

[0045] See Figure 5 , Figure 6 , Figure 11 and Figure 12 During the normal descent of the piston rod 11, the support frame 34 simultaneously drives the connecting rod 62 to move inside the rotating cylinder 60 during its lifting and lowering process. The connecting rod 62 drives the rotating rod 63 to move synchronously during the lifting and lowering process of the rotating cylinder 60. During the lifting and lowering process, the rotating rod 63, through the arc-shaped rotating groove 64, drives the rotating cylinder 60 to rotate at the bottom of the fixed frame 20. The cleaning brush 61 on the outer periphery of the rotating cylinder 60 will clean the L-shaped moving plate 12 and the limiting slot 14, and clean the dust in the limiting slot 14, effectively preventing the dust from accumulating inside the limiting slot 14.

[0046] See Figure 5 , Figure 7 , Figure 8 and Figure 9 During the rapid descent of piston rod 11, arc-shaped moving rod 13 contacts triangular trigger block 21 and rotates. Triangular trigger block 21 drives arc-shaped gear disk 25 to rotate synchronously. If arc-shaped gear disk 25 fails to reset in time after rotation, it will jam arc-shaped moving rod 13. At this time, support frame 34 will be raised to its highest position. Support frame 34 drives push rod 45 to rise to the top. Push rod 45 moves within inclined groove 44 during its ascent, pressing against the push rod. Under the action of the limiting base plate 40, the first sliding groove 41 and the first slider 42, the block 43 moves horizontally, pushing the limiting block 46 on the block 43 into the limiting slot 14 of the L-shaped motion plate 12, thus limiting and locking the piston rod 11 for the second time. During the normal descent of the piston rod 11, the support frame 34 will not drive the push rod 45 into the top of the inclined groove 44, so the push block 43 will not carry the limiting block 46 into the limiting slot 14 of the L-shaped motion plate 12.

[0047] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An anti-impact hydraulic cylinder, comprising a piston rod movable at the top of the hydraulic cylinder, characterized in that, The hydraulic cylinder is equipped with a fixed frame to prevent the piston rod from impacting and falling. The piston rod is equipped with an L-shaped moving plate that moves through the fixed frame. The fixed frame is equipped with a toggle assembly that moves in coordination with the L-shaped moving plate. During the lifting and lowering movement, the L-shaped moving plate toggle the triangular trigger block in the toggle assembly. The fixed frame is equipped with a limiting component for the rapid descent of the L-shaped moving plate. The limiting block in the limiting component can limit and lock the L-shaped moving plate as it descends rapidly. The triangular trigger block is equipped with an arc-shaped gear plate that drives the limiting block to move outward. The fixed frame is equipped with a blower assembly for cleaning the top of the hydraulic cylinder. The arc-shaped gear plate drives the piston rod in the blower assembly to move up and down. The bottom of the fixed frame is equipped with a cleaning assembly for cleaning the L-shaped moving plate, and the cleaning assembly includes a rotating cylinder that moves at the bottom of the fixed frame. The L-shaped motion plate is equipped with an arc-shaped motion rod. The L-shaped motion plate has a limiting slot that matches the size of the limiting block. The L-shaped motion plate moves in the fixing hole opened in the fixing frame. The limiting component also includes a fixing seat installed at the bottom of the fixing frame. A fixing shaft is movably installed on the top of the fixing seat. Triangular trigger blocks are movably connected to both ends of the fixing shaft. Arc-shaped toothed discs are movably connected to the outside of the triangular trigger blocks. A torsion spring is installed between the triangular trigger blocks and the fixing seat. The torsion springs are movably connected to the outside of the fixing shaft. A limiting base is installed at the bottom of the fixing frame. A rack plate that movably meshes with the arc-shaped toothed disc is movably connected to the limiting base. During the rapid descent of the piston rod, the arc-shaped moving rod contacts the triangular trigger block and rotates. The triangular trigger block drives the arc-shaped gear disk to rotate synchronously. If the arc-shaped gear disk does not reset in time after the rotation process, the arc-shaped gear disk will jam the arc-shaped moving rod.

2. The anti-impact hydraulic cylinder according to claim 1, characterized in that, A support frame is fixedly installed between the tops of the rack plates. A limiting base plate is installed on the top of the fixed frame. A first sliding groove is opened at the bottom of the limiting base plate. A first slider is slidably connected to the first sliding groove. A pushing block is installed at the bottom of the first slider. The pushing block has an inclined groove. A pushing rod that moves in the inclined groove is installed on the top of the support frame. A limiting block is installed on the pushing block, and the top of the limiting block moves in the limiting groove. A telescopic spring is fixedly installed at the end of the pushing block away from the limiting block, and the telescopic spring is installed on the inner wall of the fixed frame.

3. The anti-impact hydraulic cylinder according to claim 2, characterized in that, The limiting base has a second sliding groove on the side near the arc-shaped toothed disc. A second slider is slidably connected to the limiting base in the second sliding groove. The second slider is fixedly installed on the rack plate. A counterweight is fixedly installed at the bottom of the arc-shaped toothed disc. A limiting support block for limiting and supporting the counterweight is installed on the inner side wall of the fixing frame.

4. The anti-impact hydraulic cylinder according to claim 3, characterized in that, The blower assembly also includes a cleaning cylinder fixedly installed at the top of the mounting frame. A blower holder with a nozzle is fixedly installed on the top of the mounting frame near the piston rod. A piston plate is movably arranged inside the cleaning cylinder. A movable rod is fixedly installed at the bottom center of the piston plate. The bottom of the movable rod extends through to the bottom outside of the cleaning cylinder. The bottom end of the movable rod is fixedly installed at the top of the support frame.

5. The anti-impact hydraulic cylinder according to claim 4, characterized in that, The top of the cleaning cylinder is provided with an air outlet pipe, which is connected to the blower base. The top of the cleaning cylinder is connected with an L-shaped air inlet pipe, and the inlet of the L-shaped air inlet pipe is located on the side of the fixed frame away from the hydraulic cylinder. Both the air outlet pipe and the L-shaped air inlet pipe are equipped with one-way valves.

6. The anti-impact hydraulic cylinder according to claim 1, characterized in that, The cleaning assembly also includes a cleaning brush installed at the bottom of the rotating cylinder. The cleaning brush is made of plastic and moves against the limiting slot opened in the L-shaped moving plate. A connecting rod is fixedly installed at the bottom of the support frame. The bottom of the connecting rod extends through into the rotating cylinder, and a rotating rod is fixedly installed at the bottom of the connecting rod.

7. The anti-impact hydraulic cylinder according to claim 6, characterized in that, The rotating cylinder has an arc-shaped rotating groove that matches the size of the rotating rod, and the rotating rod moves within the arc-shaped rotating groove. The bottom of the fixed frame is fixedly installed with an arc-shaped protective cover on the side away from the hydraulic cylinder, and both the rotating cylinder and the cleaning brush move within the arc-shaped protective cover.

8. The anti-impact hydraulic cylinder according to claim 1, characterized in that, A support base is fixedly installed at the bottom of the hydraulic cylinder, and a connecting device is fixedly installed at the bottom of the hydraulic cylinder. An oil pipe for injecting oil into the hydraulic cylinder is connected to the connecting device.

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