Multi-stage buffer device

Abstract

The utility model relates to a multi-stage buffering device which comprises a cylinder barrel and a piston rod assembly. A throttle pipe is sleeved between the cylinder barrel and the piston rod assembly; the piston rod assembly, the cylinder barrel, the throttle pipe and the cylinder bottom form a primary buffer structure; the outer ring surface of the cylinder barrel is connected with the air cylinder assembly through a connecting flange, and the connecting flange and the air cylinder assembly form a secondary buffer structure; a plurality of small holes are formed in the surface of the throttle pipe, and the piston rod assembly, the throttle pipe and the cylinder bottom form a brake buffering structure. According to the utility model, the stability and reliability of equipment can be improved, and the damage caused by impact and vibration is reduced; key components of the system are protected, and the service life of equipment is prolonged; meanwhile, the operation performance of equipment is improved, and the working efficiency is improved; in addition, the maintenance cost is reduced, and the downtime caused by faults is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a multi-stage buffer device. Background Art

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). When a hydraulic cylinder drives a working part with a large mass and a fast movement speed, a buffer device is generally required to eliminate the mechanical impact between the piston and the end cover caused by the inertia force and hydraulic pressure of the moving parts, and at the same time reduce the noise of the liquid when the piston changes the direction of movement.

[0003] Existing buffer devices generally protect the cylinder body by arranging compression springs and buffer pads to buffer the impact force of the piston head hitting the two ends of the cylinder body. Therefore, most of them do not have a multi-stage buffer structure and can only perform simple buffering on the hydraulic cylinder. The buffering effect is poor, which is not conducive to long-term use, is prone to damage, and has low practicality.

[0004] Other forms of buffer devices, such as throttle groove buffer devices, require grooves with relatively high processing precision on the end cover and the piston rod. Not only is the processing technology complicated, but also has strict requirements on processing precision and machine tools. If the gap is small, the cylinder will be over-buffered, and if the gap is large, the buffering effect is not obvious. For example, if a throttle valve is added to the cylinder, a throttle valve and an oil circuit block need to be added. These additional accessories are not only more expensive, but if the throttle valve fails, the cylinder of the entire motion system will not be controlled during operation, which will cause safety hazards to the entire equipment or damage the system. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a multi-stage buffer device to solve the problems that the buffer effect of the hydraulic cylinder is poor, it is not conducive to long-term use, it is easy to be damaged and has low practicality.

[0006] The technical solution adopted by the utility model to solve its technical problems is: a multi-stage buffer device, including a cylinder and a piston rod assembly arranged in the cylinder; a throttle tube is sleeved between the cylinder and the piston rod assembly; the piston rod assembly, the cylinder, the throttle tube, and the cylinder bottom form a primary buffer structure; the outer ring surface of the cylinder is connected to the air storage cylinder assembly through a connecting flange, and the connecting flange and the air storage cylinder assembly form a secondary buffer structure; the surface of the throttle tube is provided with a plurality of small holes, and the piston rod assembly, the throttle tube and the cylinder bottom form a brake buffer structure.

[0007] Furthermore, hydraulic oil is provided between the cylinder barrel and the piston rod assembly of the utility model.

[0008] Furthermore, the utility model has a first air chamber between the piston rod assembly and the cylinder, a second air chamber between the piston rod assembly and the throttle tube, a third air chamber between the throttle tube and the cylinder, a fourth air chamber between the connecting flange, and a fifth air chamber between the air storage cylinder assembly.

[0009] Furthermore, when the primary buffer structure of the utility model realizes buffering, the first air chamber and the second air chamber enter the third air chamber.

[0010] Furthermore, when the secondary buffer structure of the utility model realizes buffering, the third air chamber enters the fourth air chamber and the fifth air chamber.

[0011] Furthermore, when the brake buffer structure of the utility model realizes buffering, the second air chamber enters the third air chamber.

[0012] Furthermore, the piston rod assembly, the cylinder barrel and the front end component of the utility model form an acceleration device.

[0013] The beneficial effect of the utility model is that it solves the defects existing in the background technology. The first-level buffer is composed of the piston rod assembly, cylinder barrel, throttle tube and cylinder bottom; the second-level buffer is composed of the connecting flange and the air storage tank; the braking buffer is composed of the piston rod assembly, throttle tube and cylinder bottom; it can not only improve the stability and reliability of the equipment and reduce the damage caused by impact and vibration; but also protect the key components of the system and extend the service life of the equipment; at the same time, it improves the operating performance of the equipment and improves the work efficiency; and it reduces the maintenance cost and reduces the downtime caused by failures. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a cross-sectional schematic diagram of the throttling tube of the utility model;

[0016] In the figure: 1. piston rod assembly; 2. cylinder barrel; 3. throttle tube; 4. cylinder bottom; 5. connecting flange; 6. air reservoir assembly; 7. hydraulic oil; 8. small hole. DETAILED DESCRIPTION

[0017] Now the utility model is further described in detail in conjunction with the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0018] like Figure 1-Figure 2A multi-stage buffer device shown in the figure includes a piston rod assembly 1, a cylinder barrel 2, a throttle tube 3, a cylinder bottom 4, a connecting flange 5, an air reservoir assembly 6, a hydraulic oil 7 and other components; the piston rod assembly 1 is arranged in the cylinder barrel 2, and a throttle tube 3 is sleeved between the cylinder barrel 2 and the piston rod assembly 1; the outer ring surface of the cylinder barrel 2 is connected to the air reservoir assembly 6 through a connecting flange 5, and a plurality of small holes 8 are arranged on the surface of the throttle tube 3.

[0019] Among them, the piston rod assembly 1, the cylinder barrel 2 and the front section components constitute an acceleration device, the piston rod assembly 1, the cylinder barrel 2, the throttle tube 3, and the cylinder bottom 4 constitute a primary buffer, and the air chambers A and B enter the air chamber C;

[0020] Piston rod assembly 1: responsible for transmitting force during compression or extension, and realizing gas compression and release through synergy with cylinder 2.

[0021] Cylinder 2: Provides movement space for the piston rod and ensures the sealing of the gas to prevent gas leakage.

[0022] Throttle tube 3: It achieves buffering effect by limiting gas flow, slowing down the movement speed of the piston rod and preventing impact.

[0023] Cylinder bottom 4: Closes one end of the cylinder to ensure effective compression of the gas and forms a stable buffer structure together with other components.

[0024] With the combined effect of these components, the primary buffer can effectively reduce mechanical shock and vibration, protect the system from damage, and improve the stability and reliability of the equipment.

[0025] The secondary buffer composed of the connecting flange 5 and the air reservoir assembly 6, the air chamber C enters the air chambers D and E;

[0026] Connecting flange 5: Ensures a firm connection between the various components to prevent gas leakage and structural loosening.

[0027] Gas storage cylinder assembly 6: stores the gas released from the primary buffer, and through its volume and structural design, further slows down the release speed of the gas to achieve a secondary buffer effect.

[0028] Through secondary cushioning, the system can further absorb and disperse impact energy, reduce the impact on the entire system, and improve the durability and safety of the equipment.

[0029] The brake buffer composed of the piston rod assembly 1, the throttle tube 3 and the cylinder bottom 4, the air chamber B enters the air chamber C;

[0030] During the braking process, the piston rod assembly 1, the throttle tube 3 and the cylinder bottom 4 work together. Through the limiting effect of the throttle tube 3, the movement speed of the piston rod is gradually reduced, thereby achieving smooth braking.

[0031] This brake buffer design can effectively prevent the impact and vibration caused by sudden braking, protecting the stability and safety of the system. At the same time, the smooth braking process also helps to extend the service life of the equipment and reduce maintenance costs.

[0032] Working principle:

[0033] Each part according to Figure 1 Structural assembly: a certain volume of hydraulic oil (7 m liters) is added between the cylinder 2 and the piston rod assembly 1.

[0034] In the initial state, the piston rod assembly 1 is in a retracted state; during the test, a set thrust (such as air pressure) is given to the piston rod 1 of the piston rod assembly through the acceleration device, and the piston rod assembly 1 accelerates in the cylinder 2. At this time, the piston rod assembly 1 pushes the hydraulic oil 7 and air to flow in the direction of the throttle tube 3. Due to the rapid compression of the hydraulic oil 7 and the air, the resistance formed gradually increases. After reaching the required speed, the resistance is greater than the thrust, and the piston rod assembly 1 begins to decelerate. At the same time, the hydraulic oil 7 and the air enter the outer cavity of the throttle tube through the throttle tube (air chambers A and B enter air chamber C), and enter the air reservoir assembly 6 through the connecting flange 5 (air chamber C enters air chambers D and E), forming a throttle tube 3 buffer and a connecting flange 5 secondary buffer. When the floating piston in the piston rod assembly 1 enters the throttle tube, throttling begins through the damping cylinder small hole 8, the displacement is reduced, and the damping force is gradually increased again (air chamber B enters air chamber C), the accelerated piston rod is decelerated and braked until the piston rod assembly stops moving, completing the braking action.

[0035] The above description only describes the specific implementation methods of the utility model. Various examples do not limit the essential content of the utility model. Ordinary technicians in the relevant technical field can modify or deform the specific implementation methods described above after reading the description without departing from the essence and scope of the utility model.

Claims

1. A multi-stage buffer device, characterized in that: It includes a cylinder and a piston rod assembly arranged in the cylinder; a throttle tube is sleeved between the cylinder and the piston rod assembly; the piston rod assembly, cylinder, throttle tube and cylinder bottom form a primary buffer structure; the outer ring surface of the cylinder is connected to the air storage cylinder assembly through a connecting flange, and the connecting flange and the air storage cylinder assembly form a secondary buffer structure; the surface of the throttle tube is provided with a plurality of small holes, and the piston rod assembly, the throttle tube and the cylinder bottom form a braking buffer structure.

2. A multi-stage buffer device as claimed in claim 1, characterized in that: Hydraulic oil is arranged between the cylinder barrel and the piston rod assembly.

3. A multi-stage buffer device as claimed in claim 1, characterized in that: There is a first air chamber between the piston rod assembly and the cylinder, a second air chamber between the piston rod assembly and the throttle tube, a third air chamber between the throttle tube and the cylinder, a fourth air chamber between the connecting flange, and a fifth air chamber between the air storage cylinder assembly.

4. A multi-stage buffer device as claimed in claim 3, characterized in that: When the primary buffer structure realizes buffering, the first air chamber and the second air chamber enter the third air chamber.

5. A multi-stage buffer device as claimed in claim 3, characterized in that: When the secondary buffer structure realizes buffering, the third air chamber enters the fourth air chamber and the fifth air chamber.

6. A multi-stage buffer device as claimed in claim 3, characterized in that: When the braking buffer structure realizes buffering, the second air chamber enters the third air chamber.

7. A multi-stage buffer device as claimed in claim 1, characterized in that: The piston rod assembly, the cylinder barrel and the front end component form an acceleration device.

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