Long stroke double support hydraulic cylinder with emergency safety lock

Abstract

The utility model discloses a long -stroke double support hydraulic oil cylinder with emergency safety lock belongs to hydraulic oil cylinder technical field, including hydraulic cylinder body, the movable end fixed support frame of support end sliding of hydraulic cylinder body outer surface is established in hydraulic cylinder body, the cylinder body of hydraulic cylinder body is welded with the support ring close to movable end side, and support frame passes through the support ring, and one side of support ring is equipped with the fixed assembly of emergency locking to support frame, the utility model discloses the cooperation of use of rack and pinion and fixed assembly can carry out emergency locking to support frame and piston rod to realize the effective emergency protection of hydraulic oil cylinder, improve the security in the equipment operation process, through being equipped with electric control valve, can cut off the oil circuit simultaneously with fixed assembly mechanical locking, form hydraulic and mechanical double protection mechanism, avoid the security risk that a single protection measure failure leads to, and strive for time for equipment maintenance and fault handling.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, and more specifically, to a long-stroke double-support hydraulic cylinder with an emergency safety lock. Background Technology

[0002] A double-support hydraulic cylinder is a type of hydraulic cylinder with support structures in both the cylinder body and the guide sleeve. This design aims to improve the cylinder's ability to withstand radial off-center loads, enhance stability, and reduce the risk of damage to critical components.

[0003] Currently, when the pipeline of a dual-support hydraulic cylinder on the market is damaged, the pressure inside the hydraulic cylinder will decrease, thus losing support. Under load, the hydraulic cylinder is prone to rapid contraction, which can not only cause impact damage to the equipment itself, but also lead to production safety accidents and pose a serious threat to the personal safety of operators. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a long-stroke double-support hydraulic cylinder with an emergency safety lock, which aims to solve the problems mentioned in the background art.

[0005] The present invention adopts the following technical solution: a long-stroke double-support hydraulic cylinder with an emergency safety lock, comprising a hydraulic cylinder body, a support frame whose supporting end slides on the outer surface of the hydraulic cylinder body, a support ring welded to the cylinder body near the moving end, the support frame passing through the support ring, and a fixing component for emergency locking of the support frame provided on one side of the support ring.

[0006] The fixing assembly includes multiple mounting ears fixed to one side of the support ring. A gear rotates between the two sides of the mounting ears. Multiple inner walls of the support frame have toothed grooves on opposite sides that mesh with the gears. Each mounting ear has a turntable on both outer sides that rotates concentrically with the gear via a shaft. Multiple sliding holes are evenly provided on the outer side of the turntable. A locking block slides in the sliding hole. The locking block and the sliding hole are limited by a pulling assembly. A stop block is fixed on the side of the support ring where the mounting ears are mounted.

[0007] As a preferred embodiment of this utility model, the pulling component includes a tension spring, with both ends of the tension spring fixed to the locking block and the sliding hole, respectively.

[0008] As a preferred embodiment of this utility model, a guide frame is fixed on the side of the hydraulic cylinder body away from the moving end, and the guide frame passes through the support frame and is fixed to the support ring.

[0009] As a preferred embodiment of this utility model, a plurality of springs are fixed to the guide frame facing the support frame side, and a connecting ring is fixed to the other end of the plurality of springs.

[0010] As a preferred embodiment of this utility model, a rubber pad is fixed to the side of the connecting ring facing the support frame for cushioning when in contact with the support frame.

[0011] As a preferred embodiment of this utility model, an electrically controlled valve is fixed at the connection end between the cylinder body and the external pipeline of the hydraulic cylinder body, which is used to block the oil flow.

[0012] As a preferred embodiment of this utility model, a fixing ring is fixed on the side of the support frame near the moving end to increase the supporting force at the end of the support frame.

[0013] In a preferred embodiment of this utility model, the stop block and the turntable are located on the same horizontal plane, and there is a gap between the stop block and the turntable.

[0014] Beneficial effects

[0015] Compared with existing technologies, the advantages of this utility model are:

[0016] 1. This utility model, through the combined use of gear rack and pinion and fixing components, can lock the support frame and piston rod in an emergency, thereby achieving effective emergency protection of the hydraulic cylinder and improving the safety of the equipment during operation.

[0017] 2. This utility model, by incorporating a spring and a connecting ring, forms a two-stage buffer protection mechanism, which can unload the impact force on the support frame when the fixed component fails, avoiding structural damage to the support frame itself or the cylinder due to excessive instantaneous impact force, and effectively improving the reliability and durability of the overall emergency braking system.

[0018] 3. This utility model, by incorporating an electrically controlled valve, can quickly cut off the oil circuit while the fixed component is mechanically locked, forming a dual hydraulic and mechanical protection mechanism. This avoids safety risks caused by the failure of a single protection measure and buys time for equipment maintenance and troubleshooting. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present utility model;

[0020] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0021] Figure 3 For the present utility model Figure 1 A partial sectional view;

[0022] Figure 4 For the present utility model Figure 3 A partial sectional view;

[0023] Figure 5 For the present utility model Figure 1 A magnified view of a portion of the image.

[0024] Explanation of the labels in the diagram:

[0025] 1. Hydraulic cylinder body; 2. Electrically controlled valve; 3. Support frame; 4. Guide frame; 5. Support ring; 6. Fixing ring; 7. Spring; 8. Connecting ring; 9. Gear groove; 10. Turntable; 11. Mounting ear; 12. Gear; 13. Sliding hole; 14. Clamping block; 15. Tension spring; 16. Stop block; 17. Rubber pad. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral 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 a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Example:

[0030] Please see Figure 1-5 A long-stroke double-support hydraulic cylinder with an emergency safety lock includes a hydraulic cylinder body 1. The moving end of the hydraulic cylinder body 1 is fixed with a support frame 3 whose supporting end slides on the outer surface of the hydraulic cylinder body 1. A support ring 5 is welded to the cylinder body of the hydraulic cylinder body 1 near the moving end. The support frame 3 passes through the support ring 5. A fixing component for emergency locking of the support frame 3 is provided on one side of the support ring 5.

[0031] The fixing assembly includes multiple mounting ears 11 fixed to one side of the support ring 5. A gear 12 rotates between the two sides of the mounting ears 11. Multiple inner walls of the support frame 3 have toothed grooves 9 on opposite sides that mesh with the gear 12. Each mounting ear 11 has a turntable 10 on both outer sides that rotates concentrically with the gear 12 via a shaft. Multiple sliding holes 13 are evenly provided on the outer side of the turntable 10. A locking block 14 slides in the sliding hole 13. The locking block 14 and the sliding hole 13 are limited by a pulling assembly. A stop block 16 is fixed on the side of the support ring 5 where the mounting ears 11 are installed.

[0032] When the external pipeline of the hydraulic cylinder body 1 is damaged, the external load will drive the piston rod to move rapidly, thereby driving the support frame 3 to move. The support frame 3 will drive the tooth groove 9 to move, thereby driving the gear 12 to rotate. The gear 12 drives the turntable 10, and the centrifugal force generated will cause the locking block 14 to slide in the sliding hole 13, thereby causing the sliding locking block 14 to abut against the stop block 16, thereby achieving emergency locking of the gear 12, and thus achieving emergency locking of the support frame 3 and the piston rod, thereby achieving effective emergency protection of the hydraulic cylinder and improving the safety of the equipment during operation.

[0033] In this utility model, the pulling component is a tension spring 15, or it can be two magnetic blocks that attract each other. Preferably, it is a tension spring 15. The two ends of the tension spring 15 are fixed to the locking block 14 and the sliding hole 13 respectively, which can counteract the centrifugal force generated by the turntable 10 when rotating at a constant speed, so that the locking block 14 is always located in the sliding hole 13, thereby improving the stability of the equipment under normal working conditions.

[0034] When an external pipeline suddenly breaks, causing abnormal load movement, the rapid displacement of the piston rod will trigger the meshing transmission between the support frame 3 and the gear 12. At this time, the rotation speed of the turntable 10 increases sharply, and the centrifugal force generated instantly exceeds the tension threshold of the tension spring 15. The locking block 14 will then be thrown out radially along the sliding hole 13 and rigidly collide with the stop block 16. The movement trend of the support frame 3 is restricted in the opposite direction by the braking of the gear 12, forming a mechanical self-locking closed loop.

[0035] Furthermore, a guide frame 4 is fixed on the side of the hydraulic cylinder body 1 away from the moving end, and the guide frame 4 passes through the support frame 3 and is fixed to the support ring 5;

[0036] By providing auxiliary support to one end of the support frame 3, the end of the support frame 3 that slides on the hydraulic cylinder body 1 will not contact the cylinder body, thereby reducing the wear of the support frame 3 on the hydraulic cylinder body 1 and improving the stability of the support frame 3 during movement, thus avoiding skewing or jamming caused by unilateral force.

[0037] The guide frame 4 can also form a two-way positioning structure with the support ring 5, ensuring that the support frame 3 always moves linearly along the axis of the hydraulic cylinder body 1, further optimizing the meshing accuracy of the gear 12 and the tooth groove 9, and reducing mechanical losses during the transmission process.

[0038] Furthermore, a plurality of springs 7 are fixed to the guide frame 4 on the side facing the support frame 3, and a connecting ring 8 is fixed to the other end of the plurality of springs 7;

[0039] When the fixed component fails, the rapid displacement of the support frame 3 will contact the connecting ring 8, thereby compressing the spring 7 to contract. The impact force of the spring 7 on the displacement of the support frame 3 is converted into elastic force, thereby absorbing part of the kinetic energy through elastic deformation, forming a secondary buffer protection mechanism.

[0040] It can relieve the impact force of the support frame 3 when the fixed component fails, and avoid structural damage to the support frame 3 itself or the cylinder due to excessive instantaneous impact force, thus effectively improving the reliability and durability of the overall emergency braking system.

[0041] Meanwhile, the elastic recovery characteristic of spring 7 allows the auxiliary connecting ring 8 and support frame 3 to return to their initial positions after the emergency is over, facilitating subsequent equipment maintenance and reset operations.

[0042] A rubber pad 17 is fixed to the side of the connecting ring 8 facing the support frame 3. It is used to buffer when in contact with the support frame 3, avoid rigid impact caused by direct collision of metal parts, reduce noise and wear at the moment of contact, and further improve the buffering effect.

[0043] The elastic deformation characteristics of the rubber pad 17 can also disperse the impact force to a certain extent. Together with the spring 7, they form a multi-level buffer system to ensure that the kinetic energy of the support frame 3 can be absorbed more smoothly when the fixed component fails, providing double protection for the emergency protection of the equipment.

[0044] In addition, the rubber pad 17 is made of aging-resistant and high-strength rubber material, which can adapt to factors such as oil stains and temperature changes in the working environment of the hydraulic cylinder body 1, extend its service life, and ensure long-term stable buffering performance.

[0045] The cylinder body 1 is connected to the external pipeline with an electric control valve 2, which is used to block the oil. When the external pipeline pressure is abnormal or damaged, the electric control valve 2 can quickly cut off the oil circuit while the fixed component is mechanically locked, forming a dual protection mechanism of hydraulic and mechanical.

[0046] The pressure sensor of the electric control valve 2 is linked with the hydraulic cylinder body 1. Once a sudden drop in oil pressure or abnormal flow is detected, the valve core is immediately triggered to act. By blocking the inlet and outlet oil channels, the displacement trend of the piston rod is further restricted, thus avoiding safety risks caused by the failure of a single protection measure.

[0047] In addition, the electric control valve 2 has a manual emergency operation function. In the event of a circuit failure, the valve can be forcibly closed by a mechanical handle, ensuring reliable oil circuit isolation even under complex operating conditions, thus buying time for equipment maintenance and troubleshooting.

[0048] A fixing ring 6 is fixed near the moving end of the support frame 3 to increase the support force at the end of the support frame 3, prevent the end of the support frame 3 from deforming due to stress concentration during long-term load-bearing or emergency braking, and improve its structural stability.

[0049] The stop block 16 and the turntable 10 are located on the same horizontal plane, and there is a gap between the stop block 16 and the turntable 10. This gap is set to avoid contact interference between the jamming block 14 and the stop block 16 when the turntable 10 rotates normally, so as to ensure the smooth operation of the equipment under normal working conditions.

[0050] The size of the gap is precisely calculated to ensure that the locking block 14 has enough stroke to slide out and abut against the stop block 16 under the action of centrifugal force, so as to realize the emergency locking function. It can also prevent false triggering or increased frictional resistance during normal rotation due to the gap being too small. At the same time, it avoids the locking effect from being affected by the gap being too large, which would prevent the locking block 14 from abutting against the stop block 16 in time.

[0051] This design fully considers the safety and stability of equipment operation, enabling the fixed components to function quickly and reliably in emergency situations, while not adversely affecting the normal operation of the equipment under normal working conditions.

[0052] The specific steps for using this utility model are as follows:

[0053] When a sudden rupture of the external pipeline causes abnormal load movement, the rapid displacement of the piston rod will trigger the meshing transmission between the support frame 3 and the gear 12. At this time, the rotation speed of the turntable 10 increases sharply, and the centrifugal force generated instantly exceeds the tension threshold of the tension spring 15. The locking block 14 will then be thrown out radially along the sliding hole 13 and rigidly collide with the stop block 16. The movement trend of the support frame 3 is restricted in the reverse direction by the braking of the gear 12, forming a mechanical self-locking closed loop, thereby achieving emergency locking of the support frame 3 and the piston rod, thus realizing effective emergency protection of the hydraulic cylinder and improving the safety of the equipment during operation.

[0054] It should be noted that the fixing of this utility model is achieved by bolts, welding, bonding, riveting, etc. Those skilled in the art can adjust the fixing method according to actual needs to meet the installation of relevant parts or components.

[0055] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A long-stroke double-support hydraulic cylinder with an emergency safety lock, comprising a hydraulic cylinder body (1), wherein the moving end of the hydraulic cylinder body (1) is fixed with a support frame (3) whose supporting end slides on the outer surface of the hydraulic cylinder body (1), characterized in that: The cylinder body (1) has a support ring (5) welded to the side of the cylinder near the moving end. The support frame (3) passes through the support ring (5). A fixing component for emergency locking of the support frame (3) is provided on one side of the support ring (5). The fixing assembly includes multiple mounting ears (11) fixed on one side of the support ring (5). A gear (12) rotates between the two sides of the mounting ears (11). Multiple inner walls of the support frame (3) are provided with tooth grooves (9) that mesh with the gear (12) on opposite sides. Each mounting ear (11) has a turntable (10) that rotates concentrically with the gear (12) through a shaft on both outer sides. Multiple sliding holes (13) are evenly provided on the outer side of the turntable (10). A locking block (14) slides in the sliding hole (13). The locking block (14) and the sliding hole (13) are limited by a pulling assembly. A stop block (16) is fixed on the side of the support ring (5) where the mounting ears (11) are installed.

2. The long-stroke double-support hydraulic cylinder with an emergency safety lock according to claim 1, characterized in that: The pulling assembly includes a tension spring (15), the two ends of which are fixed to the locking block (14) and the sliding hole (13), respectively.

3. The long-stroke double-support hydraulic cylinder with an emergency safety lock according to claim 1, characterized in that: A guide frame (4) is fixed on the side of the hydraulic cylinder body (1) away from the moving end. The guide frame (4) passes through the support frame (3) and is fixed to the support ring (5).

4. The long-stroke double-support hydraulic cylinder with an emergency safety lock according to claim 3, characterized in that: Multiple springs (7) are fixed on the side of the guide frame (4) facing the support frame (3), and a connecting ring (8) is fixed on the other end of the multiple springs (7).

5. The long-stroke double-support hydraulic cylinder with an emergency safety lock according to claim 3, characterized in that: A rubber pad (17) is fixed to the side of the connecting ring (8) facing the support frame (3) for cushioning when it comes into contact with the support frame (3).

6. The long-stroke double-support hydraulic cylinder with an emergency safety lock according to claim 1, characterized in that: The hydraulic cylinder body (1) is equipped with an electric control valve (2) at the connection end between the cylinder body and the external pipeline, which is used to block the oil.

7. The long-stroke double-support hydraulic cylinder with an emergency safety lock according to claim 1, characterized in that: A fixing ring (6) is fixed near the moving end of the support frame (3) to increase the support force at the end of the support frame (3).

8. The long-stroke double-support hydraulic cylinder with an emergency safety lock according to claim 1, characterized in that: The stop block (16) and the turntable (10) are on the same horizontal plane, and there is a gap between the stop block (16) and the turntable (10).

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