Locking assembly for preventing looseness of hydraulic pipeline joint

Abstract

The invention relates to the technical field of hydraulic hose connection, in particular to an anti-loosening locking assembly for a hydraulic pipeline joint, which comprises a core body, a barrel body sleeved on the outer side of the core body and a cooperative locking mechanism arranged between the core body and the barrel body, helical tooth rings which are distributed in an array mode are arranged on the outer side of the core body, the interior of the barrel body is divided into a containing cavity, a deflection piece with deflection teeth A and deflection teeth B is arranged on the inner ring of the containing cavity, a slidable push ring is arranged in the containing cavity, and an abutting groove formed in the push ring can push the deflection teeth; the push ring is pushed to move towards the closed end of the placement cavity, the B teeth of the inclined teeth are promoted to deflect through the abutting grooves, bidirectional locking is formed between the B teeth and the inclined tooth ring on the core body, and locking of the hydraulic hose is achieved. When the push ring moves, the medium in the placement cavity is extruded to drive the expansion piece to expand, so that the hose is fixed, the sealing performance is enhanced, and external air can be effectively prevented from permeating when negative pressure is formed in the hydraulic hose.

Description

Technical Field

[0001] This invention relates to the field of hydraulic hose connection technology, and more specifically to a locking assembly for preventing loosening of hydraulic pipeline joints. Background Technology

[0002] Hydraulic hoses, as key components for transmitting hydraulic power, play an indispensable role in equipment in fields such as engineering construction, lifting and transportation, and industrial machinery. They ensure the effective transmission of hydraulic media by establishing connections between hydraulic pumps, control valves, and actuators.

[0003] To ensure reliable connection, metal fittings are usually installed at both ends of hydraulic hoses. A common practice is to use threadlocking adhesive, which is applied to the threaded connection gap and then cured to achieve bonding and locking. Alternatively, a nut interlocking structure is used, in which a pair of fitting nuts are connected by steel wire or special washers, and interlocking is achieved by their opposite rotation.

[0004] However, in practical applications, under conditions such as pressure pulsation and continuous equipment vibration in engineering machinery, traditional threaded pipe fittings are subjected to alternating stress and fluid impact for a long time, making them prone to loosening. This loosening can lead to hydraulic oil leakage, causing not only a drop in system pressure, equipment shutdown and production interruption, but also significant safety hazards.

[0005] Chinese patent application number CN202310904695.5 discloses a hydraulic hose anti-detachment device for hydraulic equipment, relating to the field of hydraulic hose anti-detachment technology. It includes a connecting pipe fixedly sleeved at the end of the hydraulic hose body; a clamping ring on the outer side of the connecting pipe's outer end; a connecting nut sealing the connecting pipe; a fixing pipe sleeved on the outer wall of the connecting pipe; an installation pipe sleeved on the outer wall of the fixing pipe; a limiting component inside the receiving cavity; a movable ring plate slidably sleeved on the outer wall of the installation pipe; a tensioning mechanism cooperating with the movable ring plate on the inner end face of the clamping ring; and an inner connecting pipe installed inside the outer end of the connecting pipe. This solution, through the cooperation of the connecting pipe, inner connecting pipe, connecting nut, and limiting component, facilitates improved sealing and anti-detachment effects after the hydraulic hose is connected to an external pipeline. It prevents the connecting nut from rotating due to friction when in contact with external objects after being screwed into the pipeline, significantly improving the anti-loosening effect of the hydraulic hose after connection.

[0006] Although the aforementioned patents improve the sealing and anti-loosening effects of hydraulic hoses when connected to external pipelines through the cooperation of connecting pipes, inner pipes, connecting nuts, and limiting components, in practical applications, while these structures improve the anti-loosening performance to a certain extent, they often lead to complex structures, increased number of parts, increased costs, and may require special tools or operating procedures during disassembly and assembly, thus reducing maintenance efficiency.

[0007] Currently, hydraulic hoses have metal fittings at their ends. A secure connection between the hose and fitting is achieved through crimping between the metal fittings. However, during equipment operation, especially at the moment of start-up, stop, or reversal of the actuator, frequent and severe pressure shocks occur in the pipeline. This continuous pressure fluctuation, like repeated hammering of the fitting, generates alternating stress on the metal fitting connection. Over time, this can lead to tiny gaps between the threaded parts, eventually causing loosening.

[0008] Meanwhile, when the fluid in the hydraulic hose suddenly stops flowing or the instantaneous flow velocity in the pipeline is too high, the downstream fluid will continue to move forward due to inertia, causing the local pressure inside the hose to drop instantaneously, forming a negative pressure. If this negative pressure is large enough, it will cause the hose wall to collapse inward. More importantly, under continuous negative pressure, if there are minor defects in the seal at the metal joint connection, external air may be forced into the hose by atmospheric pressure, thereby reducing the stiffness of the oil, resulting in a slower system response speed and reduced power transmission efficiency. Summary of the Invention

[0009] The purpose of this invention is to provide a locking assembly for preventing loosening of hydraulic pipeline joints, thereby solving the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a locking assembly for preventing loosening of hydraulic pipeline joints, comprising a core and further comprising: The cylindrical body is located outside the core and has a mounting cavity inside; The pusher is located inside the mounting cavity and is slidably connected to the cylinder. A deflector is disposed in the inner ring of the cylinder. When the pusher moves toward the closed end of the housing cavity, the pusher pushes the deflector to achieve the deflection of the deflector. A locking element is provided at the connection between the pusher and the cylinder. When the pusher is stationary inside the housing cavity, the locking element locks the position of the pusher. The helical tooth rings are arranged in an array on the outside of the core. After the deflector completes its deflection, the deflector and the helical tooth rings form a bidirectional locking.

[0011] Preferably, the deflecting member includes an array of placement grooves distributed in the inner ring of the cylinder, and each placement groove is provided with deflecting teeth; when the pushing member moves toward the closed end of the placement cavity, the pushing member pushes the deflecting teeth to achieve deflection.

[0012] Preferably, the pushing member includes a pushing ring disposed inside the mounting cavity, the pushing ring having an array of pushing grooves, the pushing grooves being used to push the offset teeth.

[0013] Preferably, the deflecting tooth includes tooth A and tooth B. When the pushing member moves inside the mounting cavity, the pushing groove pushes tooth A, and tooth B is deflected by pushing tooth A. After the deflection of tooth B, it forms a bidirectional locking with the helical tooth ring.

[0014] Preferably, the side of tooth A facing the closed end of the mounting cavity has a rotating edge. When the pushing member moves towards the open end of the mounting cavity, the groove pushes against the rotating edge of tooth A to achieve the reversal of tooth B.

[0015] Preferably, the locking element includes: A ratchet is provided at the end of the cylinder, and the end of the cylinder is provided with a stop portion that abuts against the ratchet; The ratchet rings are arranged in an array on the outside of the push ring and mesh with the ratchet teeth.

[0016] Preferably, an elastic element is provided between the push ring and the mounting cavity.

[0017] Preferably, a seal is provided at the end of the cylinder away from the ratchet. When the push ring moves toward the closed end of the mounting cavity, the medium in the mounting cavity is transferred to the seal to achieve the expansion of the seal.

[0018] Preferably, the sealing element includes an annular groove disposed at the end of the cylinder away from the ratchet, and an expansion element is provided in the annular groove; The cylinder is provided with a through hole for connecting the annular groove and the mounting cavity. The medium inside the mounting cavity enters the annular groove through the through hole to drive the expansion component to expand.

[0019] Preferably, a sealing ring is provided at the end of the push ring away from the ratchet ring.

[0020] The technical effects and advantages of this invention are as follows: 1. This invention achieves multi-stage fixation and effective anti-loosening of hydraulic hoses through the synergistic action of the pushing member and the deflecting member. When the pushing member is pushed to move towards the closed end of the mounting cavity, the groove on the pushing ring pushes against tooth A of the deflecting tooth, causing tooth B to deflect. On the one hand, this compresses the hydraulic hose, and on the other hand, it forms a bidirectional lock with the oblique tooth ring on the core, thus constituting a fixed connection for the hydraulic hose. By controlling the moving distance of the pushing ring, the deflection amount of tooth B can be precisely adjusted, thereby controlling the tightness of the hose fixation and adapting to different working conditions.

[0021] 2. When the cylinder of the present invention tends to move away from the core due to vibration, the bidirectional locking effect between the deflector and the helical tooth ring will be further enhanced; if it tends to move towards the core, the seal at the tail end of the cylinder will be compressed and provide braking force to prevent it from moving. At the same time, the locking member can effectively prevent the push ring from being displaced due to vibration, ensuring the reliable maintenance of the locking state.

[0022] 3. During the movement of the push ring of the present invention, it will squeeze the medium in the placement cavity, causing it to enter the ring groove through the through hole, resulting in the expansion member expanding. The expansion member not only fixes the outer ring of the hydraulic hose, but also compensates for the gap between the deflection members, improving the overall sealing performance. When negative pressure is generated inside the hydraulic hose, causing the pipe wall to collapse, the expansion member can fill the gap between the hose and the cylinder, effectively preventing external air from entering and ensuring the reliability and hydraulic stiffness of the hydraulic system. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the locking assembly of the present invention; Figure 2 This is a schematic diagram of the structure of the pusher component of the present invention; Figure 3 This is a schematic diagram of the structure of the cylindrical body of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the cylindrical body of the present invention; Figure 5 This is a schematic diagram of the deflector of the present invention in the unlocked state; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A; Figure 7 This is a schematic diagram of the deflector of the present invention in a locked state; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 9 This is a schematic diagram of the deflection element of the present invention.

[0024] In the picture: 100. Core; 200. Cylinder; 300. Hydraulic hose; 1. Placement cavity; 2. Pushing component; 201. Push ring; 202. Pushing groove; 3. Locking component; 301. Ratchet ring; 302. Ratchet tooth; 303. Stopping part; 4. Deflecting component; 401. Mounting groove; 402. Deflecting tooth; 4021. A tooth; 4022. B tooth; 4023. Rotating edge; 5. Elastic components; 6. Sealing element; 601. Annular groove; 602. Expansion element; 603. Through hole; 7. Helical tooth ring. Detailed Implementation

[0025] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0026] Reference Figures 1 to 7 As shown, the present invention provides a locking assembly for preventing loosening of hydraulic pipeline joints, including a core 100, an array of helical toothed rings 7 on the outer side of the core 100, and a cylindrical body 200 disposed on the outer side of the core 100, with a housing cavity 1 inside the cylindrical body 200.

[0027] In use, first, put the cylinder 200 on the outside of the hydraulic hose 300, then insert the hydraulic hose 300 into the core 100, and then push the cylinder 200 on the outside of the hydraulic hose 300 toward the core 100. The hydraulic hose 300 is fixed by the cooperation between the cylinder 200 and the core 100.

[0028] Reference Figures 3 to 9 As shown, the inner ring of the cylinder 200 is provided with a deflector 4. The deflector 4 includes an array of placement grooves 401 distributed in the inner ring of the cylinder 200. The interior of each placement groove 401 is provided with a deflector tooth 402. The deflector tooth 402 includes an A tooth 4021 and a B tooth 4022. The side of the A tooth 4021 facing the closed end of the placement cavity 1 is provided with a rotating edge 4023.

[0029] Reference Figures 3 to 9 As shown, the interior of the mounting cavity 1 is provided with a pusher 2, which is slidably connected to the cylinder 200. The pusher 2 includes a pusher ring 201 disposed inside the mounting cavity 1. The pusher ring 201 is provided with an array of pusher grooves 202, which are used to push the offset teeth 402.

[0030] By placing the push ring 201 inside the mounting cavity 1, the connection between the pusher 2 and the cylinder 200 is achieved.

[0031] It should be noted that when installing the push ring 201, the push ring 201 is pushed towards the closed end of the mounting cavity 1. When the push ring 201 moves, the end of the push ring 201 pushes against the deflecting tooth 402 to deflect the deflecting tooth 402. The push ring 201 is provided with a mark. When the open end of the cylinder 200 coincides with the mark on the push ring 201, it indicates that the push ring 201 has moved to the set position.

[0032] It should be noted that in this embodiment, the offset tooth 402 can be rotatably connected to the mounting groove 401 via a miniature torsion spring. When the push ring 201 pushes the offset tooth 402 to deflect it, as the push ring 201 continues to move, the area of ​​the groove 202 on the push ring 201 will pass through the position of the offset tooth 402. At this time, the offset tooth 402 is deflected under the action of the torsion spring, and part of the offset tooth 402 enters the groove 202. As the push ring 201 continues to move, the groove 202 will also push the offset tooth 402 to deflect it. It is worth noting that in this embodiment, when the push ring 201 moves to the set position, part of the offset tooth 402 is located inside the groove 202.

[0033] When the pusher 2 moves at the closed end of the mounting cavity 1, the pusher groove 202 pushes against tooth A 4021. By pushing against tooth A 4021, tooth B 4022 is deflected. After deflection, tooth B 4022 forms a bidirectional lock with the helical tooth ring 7.

[0034] When the pusher 2 moves toward the opening end of the mounting cavity 1, the pusher groove 202 pushes against the rotating edge 4023 of the A tooth 4021 to achieve the reversal of the B tooth 4022.

[0035] Reference Figures 1 to 7 As shown, a locking member 3 is provided at the connection between the pusher 2 and the cylinder 200. When the pusher 2 is stationary inside the placement cavity 1, the locking member 3 locks the position of the pusher 2. The locking member 3 includes a ratchet 302 provided at the end of the cylinder 200. The end of the cylinder 200 is provided with a stop part 303 that abuts against the ratchet 302. The stop part 303 is used to limit the deflection angle of the ratchet 302. The outer side of the push ring 201 is provided with an array of ratchet rings 301, which mesh with the ratchet 302.

[0036] When the push ring 201 moves toward the closed end of the mounting cavity 1, the ratchet ring 301 area of ​​the push ring 201 moves synchronously toward the closed end of the mounting cavity 1. When the push ring 201 stops moving, the ratchet 302 engages with the ratchet ring 301 to lock the position of the push ring 201.

[0037] Reference Figures 7 to 8 As shown, an elastic element 5 is provided between the push ring 201 and the mounting cavity 1.

[0038] As the push ring 201 moves toward the closed end of the mounting cavity 1, the elastic element 5 is in a gradually compressed state; after the locking element 3 releases the lock on the push ring 201, the elastic element 5 pushes the push ring 201 to achieve the reverse rotation of the offset tooth 402.

[0039] Reference Figures 4 to 8As shown, a sealing element 6 is provided at the end of the cylinder 200 away from the ratchet 302. When the push ring 201 moves toward the closed end of the placement cavity 1, the medium in the placement cavity 1 is transferred to the sealing element 6 to achieve the expansion of the sealing element 6. The sealing element 6 includes an annular groove 601 provided at the end of the cylinder 200 away from the ratchet 302, and an expansion element 602 is provided in the annular groove 601. The cylinder 200 is provided with a through hole 603 for connecting the annular groove 601 and the mounting cavity 1. The medium inside the mounting cavity 1 enters the annular groove 601 through the through hole 603 to drive the expansion member 602 to expand.

[0040] Since the end of the push ring 201 away from the ratchet ring 301 is a closed ring, when the push ring 201 moves toward the closed end of the placement cavity 1, the push ring 201 squeezes the medium in the placement cavity 1, so that the medium enters the annular groove 601 through the through hole 603 at the tail end of the cylinder 200, so that the expansion member 602 inside the annular groove 601 expands.

[0041] Specifically, a sealing ring is provided at the end of the push ring 201 away from the ratchet ring 301. After the push ring 201 enters the mounting cavity 1, the sealing ring on the push ring 201 fits into the mounting cavity 1; the sealing ring is located on the inner and outer rings of the push ring 201; by providing a sealing ring at the end of the push ring 201 away from the ratchet ring 301, the squeezing effect of the push ring 201 on the medium in the mounting cavity 1 is improved.

[0042] In the initial state, the elastic element 5 is in an uncompressed state. The abutment groove 202 pushes against the rotating edge 4023 of the offset tooth 402, causing the offset tooth 402 to rotate. That is, the main body of the B tooth 4022 is located inside the mounting groove 401, which has a reference. Figure 3 , 4 As shown in Figure 5.

[0043] When connecting the hydraulic pipeline, first, put the cylinder 200 on the outside of the hydraulic hose 300, and then insert the hydraulic hose 300 into the core 100 to achieve a primary fixed connection of the hydraulic hose 300; then push the cylinder 200, which is put on the outside of the hydraulic hose 300, toward the core 100 so that the end of the cylinder 200 is flush with the connection end of the hydraulic hose 300.

[0044] After connecting the cylinder 200, core 100, and hydraulic hose 300, the operator pushes the push ring 201 towards the closed end of the mounting cavity 1, causing the groove 202 on the push ring 201 to push against the A tooth 4021 of the offset tooth 402. This pushing against the A tooth 4021 causes the B tooth 4022 to deflect. After deflection, the B tooth 4022 compresses the hydraulic hose 300. Simultaneously, after deflection, the B tooth 4022 forms a bidirectional locking with the helical tooth ring 7. (See details...) Figure 7As shown, the cooperation between tooth B4022 and helical tooth ring 7 realizes the secondary fixed connection of hydraulic hose 300.

[0045] When the push ring 201 moves toward the closed end of the mounting cavity 1, the ratchet ring 301 area of ​​the push ring 201 moves synchronously toward the closed end of the mounting cavity 1. When the push ring 201 stops moving, the ratchet 302 engages with the ratchet ring 301 to lock the position of the push ring 201.

[0046] It should be noted that the longer the push ring 201 moves toward the closed end of the mounting cavity 1, the greater the pushing amount of the groove 202 against the A tooth 4021, the greater the deflection of the B tooth 4022, and the better the bidirectional locking effect between the B tooth 4022 and the helical tooth ring 7. By controlling the moving distance of the push ring 201 toward the closed end of the mounting cavity 1, the fixing effect of the core 100 and the cylinder 200 on the hydraulic hose 300 can be controlled.

[0047] As the push ring 201 moves toward the closed end of the mounting cavity 1, it compresses the medium within the cavity, causing it to pass through the through hole 603 at the tail end of the cylinder 200 into the annular groove 601. This causes the expansion member 602 inside the annular groove 601 to expand. After expansion, the expansion member 602 abuts against the outer ring of the hydraulic hose 300, achieving a three-stage fixed connection of the hydraulic hose 300. Simultaneously, after expansion, the expansion member 602 compensates for the gaps between the arrayed deflection members 4, improving the sealing performance between the core 100, the cylinder 200, and the hydraulic hose 300.

[0048] It should be noted that after the core 100, the cylinder 200 and the hydraulic hose 300 are connected, in this embodiment the expansion member 602 is located at the intersection of the core 100 and the hydraulic hose 300.

[0049] After the core 100, cylinder 200, and hydraulic hose 300 are locked together, the hydraulic system can be put into operation. During operation, at the moment the actuator starts, stops, or reverses, the hydraulic hose 300 will experience frequent and intense pressure shocks. This continuous pressure fluctuation, like repeatedly striking the connection between the core 100 and cylinder 200, will cause vibration at the connection point. This vibration will cause a slight movement of the cylinder 200. However, due to the design of the push ring 201 and the deflector 4, the bidirectional locking of the helical toothed ring 7 to the hydraulic hose 300 by the deflector 4 will not be affected when the cylinder 200 is subjected to vibration. Specifically, referring to... Figure 7As shown, when the cylinder 200 is affected by vibration and tends to move to the left, the ratchet 302 will not deflect due to the stop part 303 on the cylinder 200. That is, the locking part 3 will still lock the push ring 201, so that the vibration will not cause the deflection tooth 402 to deflect. The core 100, the cylinder 200 and the hydraulic hose 300 are still in the locked state.

[0050] It should be noted that even if the vibration causes the cylinder 200 to move to the left, the expansion member 602 located at the tail end of the cylinder 200 will be further compressed when the cylinder 200 moves to the left. At the same time, since it is in the locked state of the push ring 201, the expansion member 602 will provide a braking resistance when the cylinder 200 moves to the left, preventing the cylinder 200 from moving to the left. Moreover, the greater the leftward movement of the cylinder 200, the greater the braking resistance provided by the expansion member 602 will be.

[0051] When the cylinder 200 is affected by vibration and tends to move to the right, the ratchet 302 will not deflect due to the stop part 303 on the cylinder 200. That is, the locking part 3 will still lock the push ring 201. When the cylinder 200 moves to the right, the bidirectional locking effect between the deflector 4 and the helical tooth ring 7 located on the inner ring of the cylinder 200 increases, so as to increase the fixing effect of the core 100 and the cylinder 200 on the hydraulic hose 300. The greater the amount of movement of the cylinder 200 to the right, the greater the bidirectional locking effect between the deflector 4 and the helical tooth ring 7. Example 1

[0052] While the above embodiments can achieve locking of the hydraulic hose 300 in a vibrating environment, in practical applications, when the fluid in the hydraulic hose 300 suddenly stops flowing or the instantaneous flow velocity in the pipeline is too high, the downstream fluid will continue to move forward due to inertia, causing a momentary drop in local pressure inside the hose, forming a negative pressure. If this negative pressure is large enough, it will cause the hose wall to collapse inward. Under continuous negative pressure, if there are minor defects in the seal at the metal joint connection, external air may be forced into the hose by atmospheric pressure, thereby reducing the stiffness of the oil. In view of this, a technical improvement is made based on Embodiment 1, and the improved technical solution is as follows: In this embodiment, the core 100 includes a horizontal part and a wedge part. The helical toothed ring 7 is disposed on the horizontal part of the core 100. After the core 100, the cylinder 200 and the hydraulic hose 300 are connected, the expansion member 602 is located at the intersection of the horizontal part of the core 100 and the hydraulic hose 300.

[0053] When the high-pressure fluid inside the hydraulic hose 300 suddenly stops flowing, the negative pressure generated inside the hydraulic hose 300 causes the hose wall to collapse inward. Due to the expansion member 602, after the hydraulic hose 300 collapses, the gap between the outer circle of the hydraulic hose 300 and the cylinder 200 is filled by the expansion member 602 itself. This prevents outside air from entering the hydraulic hose 300 through the gap between the outer circle of the hydraulic hose 300 and the inner circle of the cylinder 200, thereby ensuring the safety and reliability of the high-pressure fluid operation. Example 2

[0054] While the above embodiments can achieve a seal on the outer circumference of the hydraulic hose 300, in practical applications, most improved anti-loosening structures in the prior art involve adding additional locking screws, limit blocks, or anti-loosening sleeves to the joint or hydraulic hose 300. However, while these structures improve anti-loosening performance to some extent, they often lead to complex structures, increased number of parts, and increased costs. Furthermore, they may require special tools or procedures for disassembly and assembly, reducing maintenance efficiency. Therefore, an improvement is made based on Embodiment 2, and the improved solution is as follows: In this embodiment, when the deflection block needs to be deflected to unlock the cylinder 200 and the core 100, the operator only needs to deflect the ratchet 302 to release the lock between the ratchet 302 and the ratchet ring 301, thus unlocking the cylinder 200 and the core 100. Specifically: Reference Figure 5 As shown, when the ratchet 302 and the ratchet ring 301 are unlocked, the push ring 201 will be driven by the elastic element 5 to move towards the opening end of the mounting cavity 1 under the elastic recovery capability of the elastic element 5. When the push ring 201 moves, the abutment groove 202 on the push ring 201 will push against the rotating edge 4023 of the A tooth 4021 to realize the reversal of the B tooth 4022. That is, the main body of the B tooth 4022 will rotate back into the mounting groove 401, thereby unlocking the cylinder 200 and the core 100. After that, the cylinder 200 can be removed from the hydraulic hose 300.

[0055] It should be noted that when the push ring 201 moves toward the opening end of the mounting cavity 1, a negative pressure will appear in the space between the end of the push ring 201 away from the ratchet ring 301 and the mounting cavity 1. The negative pressure will draw out the medium that originally entered the ring groove 601, causing the expansion member 602 to retract into the ring groove 601.

[0056] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0057] Although embodiments of the invention have been shown and described, those skilled in the art will recognize that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A locking assembly for preventing loosening of a hydraulic pipeline joint, comprising a core, characterized in that: The cylindrical body is located outside the core and has a mounting cavity inside; The pusher is located inside the mounting cavity and is slidably connected to the cylinder. A deflector is disposed in the inner ring of the cylinder. When the pusher moves toward the closed end of the housing cavity, the pusher pushes the deflector to achieve the deflection of the deflector. A locking element is provided at the connection between the pusher and the cylinder. When the pusher is stationary inside the housing cavity, the locking element locks the position of the pusher. The helical tooth rings are arranged in an array on the outside of the core. After the deflector completes its deflection, the deflector and the helical tooth rings form a bidirectional locking.

2. The locking assembly for preventing loosening of hydraulic pipeline joints according to claim 1, characterized in that, The deflecting component includes an array of mounting grooves distributed in the inner ring of the cylinder, and each mounting groove is provided with deflecting teeth; when the pushing component moves toward the closed end of the mounting cavity, the pushing component pushes the deflecting teeth to achieve deflection.

3. The locking assembly for preventing loosening of hydraulic pipeline joints according to claim 2, characterized in that, The pushing member includes a pushing ring disposed inside the mounting cavity, and the pushing ring is provided with an array of pushing grooves, which are used to push the offset teeth.

4. The locking assembly for preventing loosening of hydraulic pipeline joints according to claim 3, characterized in that, The deflecting teeth include teeth A and teeth B. When the pushing member moves inside the mounting cavity, the pushing groove pushes against teeth A. By pushing against teeth A, teeth B are deflected. After deflection, teeth B form a bidirectional locking with the helical tooth ring.

5. The locking assembly for preventing loosening of hydraulic pipeline joints according to claim 4, characterized in that, The A tooth has a rotating edge on the side facing the closed end of the placement cavity. When the pusher moves towards the open end of the placement cavity, the groove pushes against the rotating edge of the A tooth to achieve the reversal of the B tooth.

6. The locking assembly for preventing loosening of hydraulic pipeline joints according to claim 1, characterized in that, The locking element includes: A ratchet is provided at the end of the cylinder, and the end of the cylinder is provided with a stop portion that abuts against the ratchet; The ratchet rings are arranged in an array on the outside of the push ring and mesh with the ratchet teeth.

7. The locking assembly for preventing loosening of hydraulic pipeline joints according to claim 3, characterized in that, An elastic element is provided between the push ring and the mounting cavity.

8. The locking assembly for preventing loosening of hydraulic pipeline joints according to claim 6, characterized in that, The end of the cylinder away from the ratchet is provided with a seal. When the push ring moves toward the closed end of the placement cavity, the medium in the placement cavity is transferred to the seal to achieve the expansion of the seal.

9. The locking assembly for preventing loosening of hydraulic pipeline joints according to claim 8, characterized in that, The sealing element includes an annular groove disposed at the end of the cylinder away from the ratchet, and an expansion element is provided in the annular groove; The cylinder is provided with a through hole for connecting the annular groove and the mounting cavity. The medium inside the mounting cavity enters the annular groove through the through hole to drive the expansion component to expand.

10. The locking assembly for preventing loosening of hydraulic pipeline joints according to claim 3, characterized in that, The end of the push ring away from the ratchet ring is provided with a sealing ring.

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