Novel hydraulic buffer throttling self-locking oil cylinder

Abstract

This utility model relates to the field of self-locking cylinder technology, and discloses a novel hydraulic buffer throttling self-locking cylinder, including a cylinder barrel. A front cylinder head and a rear cylinder head are fixedly connected to both ends of the cylinder barrel. A piston is slidably connected inside the cylinder barrel, and a piston rod is fixedly connected to the side wall of the piston. The piston rod passes through the front cylinder head and extends to the outside, with a connecting end at its end. A two-way hydraulic lock and a two-way throttling valve core are provided inside the front cylinder head, and the two-way hydraulic lock and the two-way throttling valve core are respectively connected to the cylinder's inlet and outlet ports. A reversing valve core, a reversing spring, and a buffer valve are provided inside the rear cylinder head, with the reversing valve core abutting against the reversing spring. In this utility model, the two-way hydraulic lock automatically closes in case of system failure, ensuring the piston rod is suspended and preventing accidents. The two-way throttling valve core adjusts the oil flow rate through a thread, precisely adapting to the movement speed requirements of different working conditions and improving system stability.

Description

Technical Field

[0001] This utility model relates to the field of self-locking cylinder technology, and in particular to a novel hydraulic buffer throttling self-locking cylinder. Background Technology

[0002] Hydraulic cylinders, as actuators in hydraulic systems, are widely used in various types of mechanical equipment. Their operational stability, safety, and smoothness of action directly affect the overall performance of the machine. In actual working conditions, cylinders must meet requirements such as adjustable speed, position locking in case of accidents, and buffer protection at the end of the stroke to adapt to different loads and motion scenarios, and avoid equipment damage and safety hazards caused by mechanical shock or accidental movement.

[0003] Traditional hydraulic cylinders often suffer from limited functionality: while some cylinders possess throttling and speed regulation functions, they lack reliable self-locking mechanisms, making them prone to piston rod drop in the event of hydraulic system failure; some cylinders with buffer structures have fixed buffering effects that are difficult to adapt to different working conditions, and most do not achieve integrated design of speed regulation, self-locking, and buffering. Furthermore, existing cylinders often rely on simple throttling for buffering, which can easily generate rigid impacts when the piston rod reaches its minimum stroke, affecting equipment lifespan.

[0004] In view of the shortcomings of existing hydraulic cylinders in terms of speed regulation accuracy, self-locking reliability and buffer adaptability, there is an urgent need for a new type of hydraulic cylinder that integrates bidirectional throttling speed regulation, bidirectional hydraulic self-locking and low-position buffering functions. This would solve the problems of dispersed functions, insufficient safety and impact damage in traditional structures, meet the needs of multi-functional collaborative work of hydraulic cylinders under complex working conditions, and improve the stability and safety of equipment operation. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a novel hydraulic buffer throttling self-locking cylinder, which aims to improve the problems of functional dispersion, insufficient safety and impact damage in traditional structures.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a novel hydraulic buffer throttling self-locking cylinder, comprising a cylinder barrel, with a front cylinder head and a rear cylinder head fixedly connected to both ends of the cylinder barrel respectively; a piston is slidably connected inside the cylinder barrel; a piston rod is fixedly connected to the side wall of the piston; the piston rod passes through the front cylinder head and extends to the outside; a connecting end is provided at the end of the piston rod; a two-way hydraulic lock and a two-way throttling valve core are provided inside the front cylinder head; the two-way hydraulic lock and the two-way throttling valve core are respectively connected to the inlet and outlet ports of the cylinder; a reversing valve core, a reversing spring, and a buffer valve are provided inside the rear cylinder head; the reversing valve core abuts against the reversing spring; the reversing valve core and the buffer valve are connected through an internal channel; and the reversing valve core can be touched when the piston rod reaches its minimum stroke.

[0007] As a further description of the above technical solution:

[0008] The bidirectional hydraulic lock is located on both sides of the oil cylinder inlet and outlet. It is in the open state when there is hydraulic pressure at the oil inlet and automatically closes when there is no hydraulic pressure or the hydraulic system fails, so that the piston rod is suspended in any working position.

[0009] As a further description of the above technical solution:

[0010] The bidirectional throttle valve core is threadedly connected inside the front cylinder head. Its position can be adjusted by rotation to control the oil flow rate at the oil inlet and outlet of the cylinder, thereby adjusting the reciprocating speed of the piston rod.

[0011] As a further description of the above technical solution:

[0012] One end of the reversing valve core abuts against the reversing spring, and the other end extends into the cylinder. When the piston rod moves to the lowest stroke, the piston touches the reversing valve core and compresses the reversing spring, thereby changing the position of the reversing valve core to switch the direction of oil flow.

[0013] As a further description of the above technical solution:

[0014] The buffer valve is connected to the buffer oil port inside the rear cylinder head. After the oil is switched in direction by the reversing valve core, it flows through the buffer valve, and the piston rod is buffered at the lowest working position through the throttling effect.

[0015] As a further description of the above technical solution:

[0016] The connection points between the front cylinder head, the rear cylinder head, and the cylinder barrel are all equipped with sealing rings to prevent oil leakage.

[0017] As a further description of the above technical solution:

[0018] The buffer valve is equipped with an adjustable flow orifice, which can adjust the throttling area according to the working conditions to control the buffering speed.

[0019] This utility model has the following beneficial effects:

[0020] 1. In this utility model, the bidirectional hydraulic lock automatically closes when the system fails, ensuring the piston rod is suspended and avoiding accidents; the bidirectional throttle valve core adjusts the oil flow rate through the thread, accurately adapting to the motion speed requirements of different working conditions and improving system stability.

[0021] 2. In this utility model, when the piston rod reaches the lowest stroke, the reversing valve core is pressured to switch the oil circuit, and the oil is throttled by the buffer valve to achieve low-level buffering, avoid rigid collision, reduce wear, and extend the service life of the oil cylinder and system. Attached Figure Description

[0022] Figure 1 A perspective view of a novel hydraulic buffer throttling self-locking cylinder proposed in this utility model;

[0023] Figure 2 A schematic diagram of the front cover of a novel hydraulic buffer throttling self-locking cylinder proposed in this utility model;

[0024] Figure 3 This is a schematic diagram of the rear end cover of a novel hydraulic buffer throttling self-locking cylinder proposed in this utility model.

[0025] Legend:

[0026] 1. Rear cylinder head; 2. Reversing spring; 3. Reversing valve spool; 4. Piston; 5. Hydraulic cylinder barrel; 6. Piston rod; 7. Front cylinder head; 8. Connecting end; 9. Hydraulic lock; 10. Throttle valve spool; 11. Buffer valve. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Reference Figures 1-3 This utility model provides an embodiment of a novel hydraulic buffer throttling self-locking cylinder, comprising a cylinder barrel 5, with a front cylinder head 7 and a rear cylinder head 1 fixedly connected to both ends of the cylinder barrel 5 respectively. A piston 4 is slidably connected inside the cylinder barrel 5, and a piston rod 6 is fixedly connected to the side wall of the piston 4. The piston rod 6 passes through the front cylinder head 7 and extends to the outside, with a connecting end 8 at the end of the piston rod 6. A two-way hydraulic lock 9 and a two-way throttling valve core 10 are provided inside the front cylinder head 7, and the two-way hydraulic lock 9 and the two-way throttling valve core 10 are respectively connected to the inlet and outlet ports of the cylinder. A reversing valve core 3, a reversing spring 2, and a buffer valve 11 are provided inside the rear cylinder head 1. The reversing valve core 3 abuts against the reversing spring 2, and the reversing valve core 3 and the buffer valve 11 are connected through an internal channel. The reversing valve core 3 can be touched when the piston rod 6 reaches its lowest stroke.

[0029] Reference Figures 1-3The two-way hydraulic lock 9 is located on both sides of the oil cylinder inlet and outlet. It is open when there is hydraulic pressure at the oil inlet and automatically closes when there is no hydraulic pressure or the hydraulic system fails, so that the piston rod 6 is suspended in any working position. The two-way throttle valve core 10 is connected to the inside of the front cylinder head 7 by a thread. Its position can be adjusted by rotation to control the oil flow rate at the oil cylinder inlet and outlet, thereby adjusting the reciprocating speed of the piston rod 6. One end of the reversing valve core 3 abuts against the reversing spring 2, and the other end extends into the oil cylinder 5. When the piston rod 6 moves to the lowest stroke, the piston 4 touches the reversing valve core 3 and compresses the reversing spring 2, so that the position of the reversing valve core 3 changes to switch the direction of oil flow.

[0030] Reference Figures 1-3 The buffer valve 11 is connected to the buffer oil port inside the rear cylinder head 1. After the oil is switched in direction by the reversing valve core 3, it flows through the buffer valve 11. The piston rod 6 is buffered at the lowest working position through the throttling effect. The connection parts of the front cylinder head 7, the rear cylinder head 1 and the cylinder barrel 5 are all equipped with sealing rings to prevent oil leakage. The buffer valve 11 is equipped with an adjustable flow orifice, which can adjust the throttling area according to the working conditions to control the buffering speed.

[0031] Working principle: When the cylinder is working, hydraulic oil flows through the inlet and outlet ports of the front cylinder head 7. The two-way throttle valve core 10 can be adjusted by thread to control the oil flow rate, thereby regulating the reciprocating speed of the piston rod 6. The two-way hydraulic lock 9 opens when there is hydraulic pressure and closes when there is no hydraulic pressure or the system fails, allowing the piston rod 6 to be suspended at any position. When the piston rod 6 moves to the lowest stroke, the piston 4 touches the reversing valve core 3 in the rear cylinder head 1, compressing the reversing spring 2 to change its position. The direction of oil flow is switched and flows through the buffer valve 11. Throttling is used to achieve buffering at the lowest position. The whole system achieves speed regulation, self-locking, and buffering functions through the cooperation of various components.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A new type of hydraulic cushion throttling self-locking oil cylinder comprising a cylinder barrel (5), characterized in that: The cylinder barrel (5) is fixedly connected to the front cylinder head (7) and the rear cylinder head (1) at both ends. The cylinder barrel (5) is slidably connected to the piston (4). The piston rod (6) is fixedly connected to the side wall of the piston (4). The piston rod (6) passes through the front cylinder head (7) and extends to the outside. The piston rod (6) has a connecting end (8) at its end. The front cylinder head (7) is provided with a two-way hydraulic lock (9) and a two-way throttle valve core (10). The two-way hydraulic lock (9) and the two-way throttle valve core (10) are respectively connected to the oil inlet and outlet ports of the cylinder. The rear cylinder head (1) is provided with a reversing valve core (3), a reversing spring (2) and a buffer valve (11). The reversing valve core (3) abuts against the reversing spring (2). The reversing valve core (3) is connected to the buffer valve (11) through an internal channel. The reversing valve core (3) can be touched when the piston rod (6) reaches the minimum stroke.

2. A new type of hydraulic cushion throttle self-locking oil cylinder according to claim 1, characterized in that: The bidirectional hydraulic lock (9) is located on both sides of the oil cylinder inlet and outlet. It is in the open state when there is hydraulic pressure at the oil inlet and automatically closes when there is no hydraulic pressure or the hydraulic system fails, so that the piston rod (6) is suspended in any working position.

3. A new type of hydraulic cushion throttle self-locking oil cylinder according to claim 1, characterized in that: The bidirectional throttle valve core (10) is threaded inside the front cylinder head (7). Its position can be adjusted by rotation to control the oil flow rate at the oil inlet and outlet of the cylinder, thereby adjusting the reciprocating speed of the piston rod (6).

4. A new type of hydraulic cushion throttle self-locking oil cylinder according to claim 1, characterized in that: One end of the reversing valve core (3) abuts against the reversing spring (2), and the other end extends into the cylinder (5). When the piston rod (6) moves to the lowest stroke, the piston (4) touches the reversing valve core (3) and compresses the reversing spring (2), so that the position of the reversing valve core (3) changes to switch the direction of oil flow.

5. A new type of hydraulic cushion throttle self-locking oil cylinder according to claim 1, characterized in that: The buffer valve (11) is connected to the buffer oil port inside the rear cylinder head (1). After the oil is switched in direction by the reversing valve core (3), it flows through the buffer valve (11) and achieves the buffering of the piston rod (6) at the lowest working position through the throttling effect.

6. A new type of hydraulic cushion throttle self-locking oil cylinder according to claim 1, characterized in that: The connection points of the front cylinder head (7), the rear cylinder head (1), and the cylinder barrel (5) are all provided with sealing rings to prevent oil leakage.

7. A new type of hydraulic cushion throttle self-locking oil cylinder according to claim 1, characterized in that: The buffer valve (11) is equipped with an adjustable flow orifice, which can adjust the throttling area according to the working conditions to control the buffering speed.

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