Impact buffering device

Abstract

An impact buffering device comprises two buffering energy storage assemblies, and each buffering energy storage assembly comprises an outer cylinder barrel, a guide barrel with the bottom end fixedly connected with the outer cylinder barrel, a piston installed in the guide barrel in a sliding mode and a telescopic barrel installed between the outer cylinder barrel and the guide barrel in a sliding and sealing mode. The two outer cylinder barrels are fixed through a first connecting plate, and the tops of the two guide barrels are fixed through a second connecting plate. A connecting plate III is fixed on the two guide rings; an impact head penetrating through the second connecting plate is fixed to the upper side of the third connecting plate. According to the impact buffering device, the double-buffering energy storage assembly serves as a buffering carrier of the impact head, the third connecting plate is connected with the guide ring instead of being directly connected with the telescopic cylinder, impact force with an eccentric angle is directly transmitted to the guide cylinder instead of the telescopic cylinder, and high-stability operation of the whole impact buffering device is effectively guaranteed; in addition, the throttling valve and the one-way valve are designed in the flow channel, so that the buffering function of the impact head when the impact head is impacted is guaranteed, and rapid rebound of the impact head is achieved.

Description

Technical Field

[0001] This utility model relates to the field of impact buffering technology, and in particular to an impact buffering device. Background Technology

[0002] A hydraulic damper is an energy absorption device that converts the kinetic energy from external objects into heat energy and releases it into the atmosphere. It boasts advantages such as small size, high energy absorption capacity, and convenient installation, and is widely used in industries such as automated machinery, aerospace, military, and automotive. It reduces vibration and noise generated during mechanical operation, improves efficiency and increases productivity, effectively extends machine life, and reduces maintenance costs. Currently, hydraulic dampers offer the most convenient energy absorption device for various types of equipment.

[0003] Existing hydraulic shock absorbers often employ a single piston structure design (such as the Chinese utility model patent with announcement number CN205715422U, entitled "A High-Pressure Heavy-Duty High-Speed ​​Impact Shock Buffer"). Once the piston rod is subjected to an impact force with an eccentric angle, it is easy for the piston rod to tilt, resulting in increased frictional resistance during work, which can easily lead to leakage and reduce the service life and buffering effect of the shock absorber.

[0004] In addition, since existing hydraulic dampers mostly use a combination of throttle orifices and springs to achieve the buffering function (such as the Chinese utility model patent with announcement number CN219413369U, entitled "A Dual-Axis Separable Hydraulic Damper"), the piston rod rebound process is relatively slow, which often makes it unsuitable for working conditions with frequent heavy impacts.

[0005] Therefore, it is necessary to invent a highly stable impact buffer device that can improve resistance to radial impact while ensuring rebound speed. Utility Model Content

[0006] To address the problems in the background art, this utility model provides an impact buffer device, the specific technical solution of which is as follows:

[0007] An impact buffer device is characterized by comprising two buffer energy storage components. Each buffer energy storage component includes an outer cylinder, a guide cylinder fixedly connected to the bottom end of the outer cylinder, a piston slidably installed inside the guide cylinder, and a telescopic cylinder slidably and sealed between the outer cylinder and the guide cylinder. The guide cylinder is longer than both the outer cylinder and the telescopic cylinder. The piston divides the interior of the guide cylinder into an upper cavity (Cavity 1) and a lower cavity (Cavity 2). The bottom of the telescopic cylinder forms a cavity (Cavity 3) between the outer cylinder and the guide cylinder. Cavities 2 and 3 are connected by at least two flow channels, and at least one flow channel is equipped with a throttle valve, while the other flow channels are equipped with one-way valves with outlets facing cavity 3. Cavity 1 is filled with inert gas at a certain pressure, while cavities 2 and 3 are filled with hydraulic oil. A guide ring is slidably installed on the outer surface of the guide cylinder.

[0008] The two buffer energy storage components are arranged in parallel and symmetrically, and the two outer cylinders are fixed together by a connecting plate one, and the tops of the two guide cylinders are fixed together by a connecting plate two; a connecting plate three is fixedly installed on the two guide rings; an impact head penetrating the connecting plate two is fixedly provided on the upper side of the connecting plate three.

[0009] Furthermore, the top of the telescopic cylinder always extends beyond the outer cylinder, and the maximum extension length is not less than the length difference between the guide cylinder and the outer cylinder; the telescopic cylinder always presses against the bottom end of the guide ring under the pressure inside the cavity.

[0010] Furthermore, the gas pressure inside the cavity changes from 0.1 to 1 MPa during the impact of the impactor head.

[0011] Furthermore, at least two connecting plates are provided, and one of them is fixedly installed between the top ends of the two outer cylinders to serve as a hard limit for the downward movement stroke of the connecting plate.

[0012] Furthermore, after the guide cylinder and the outer cylinder are fixedly installed, the bottom end of the guide cylinder abuts against the inner bottom end of the outer cylinder, and the connection between cavity two and cavity three is achieved by opening a groove at the inner bottom end of the outer cylinder.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] 1. This utility model uses a double buffer energy storage component as the buffer carrier for the impact head. By connecting the connecting plate three to the guide ring instead of directly connecting it to the telescopic cylinder, the impact force with an eccentric angle can be directly transferred to the guide cylinder instead of the telescopic cylinder, ensuring the smooth sliding action of the telescopic cylinder and thus effectively ensuring the high stability of the entire impact buffer device. In addition, this utility model designs a throttle valve and a one-way valve in the flow channel, which not only ensures the buffer function of the impact head when it is impacted, but also realizes the rapid rebound of the impact head.

[0015] 2. This utility model effectively limits the maximum pressure inside the cavity by fixing one of the connecting plates between the tops of the two outer cylinders as a hard limit for the downward movement of the connecting plate. This avoids the problem of leakage or damage to the buffer energy storage component due to excessive pressure, and improves the stability of the entire impact buffer device.

[0016] 3. This utility model achieves a connection between cavity two and cavity three by abutting the bottom end of the guide cylinder with the inner bottom end of the outer cylinder and opening a groove at the inner bottom end of the outer cylinder. This effectively improves the connection strength between the guide cylinder and the outer cylinder and ensures the long-term efficient operation of the buffer energy storage component. Attached Figure Description

[0017] Figure 1-3 This is a schematic diagram of the assembly structure of this utility model.

[0018] Figure 4-6 This is a schematic diagram of the structure of the buffer energy storage component of this utility model.

[0019] Figure 7 This utility model Figure 3 A schematic diagram of the cross-sectional structure along the AA direction.

[0020] Figure 8 This utility model Figure 7 A magnified schematic diagram of the structure at point D.

[0021] Figure 9 This utility model Figure 8 A magnified schematic diagram of the structure at point E in the middle.

[0022] Figure 10 This utility model Figure 5 A schematic diagram of the cross-sectional structure along the BB direction.

[0023] Figure 11 This utility model Figure 6 A schematic diagram of the cross-sectional structure along the CC direction.

[0024] Figure 12 This utility model Figure 11 A magnified schematic diagram of the structure at point F in the middle.

[0025] In the picture:

[0026] 1-Buffer energy storage component;

[0027] 11-Outer cylinder (1101-Flow channel; 1102-One-way valve; 1103-Throttle valve; 1104-Groove); 12-Guide cylinder (1201-Guide ring); 13-Telescopic cylinder; 14-Piston; 10a-Cavity 1; 10b-Cavity 2; 10c-Cavity 3;

[0028] 2-Connecting plate one;

[0029] 3-Connecting plate two;

[0030] 4-Connecting plate three;

[0031] 5-Impact head. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention. Example:

[0033] like Figure 1-9 As shown, an impact buffer device includes two buffer energy storage components 1. Each buffer energy storage component 1 includes an outer cylinder 11, a guide cylinder 12 whose bottom end is fixedly connected to the outer cylinder 11, a piston 14 slidably installed inside the guide cylinder 12, and a telescopic cylinder 13 slidably and sealingly installed between the outer cylinder 11 and the guide cylinder 12. The guide cylinder 12 is longer than the outer cylinder 11 and the telescopic cylinder 13. The piston 14 divides the interior of the guide cylinder 12 into an upper cavity 10a and a lower cavity 10b. The bottom of the telescopic cylinder 13 forms a third cavity 10c between the outer cylinder 11 and the guide cylinder 12. The outer cylinder 11 is connected to the third cavity 10c by two flow channels 1101 located at the bottom of the inner cylinder 11. One flow channel 1101 is equipped with a throttle valve 1103, and the other flow channel 1101 is equipped with a one-way valve 1102 with its outlet facing the third cavity 10c. The first cavity 10a is filled with an inert gas at a certain pressure (nitrogen is filled in this embodiment), and the gas pressure in the first cavity 10a changes from 0.1 to 1 MPa during the impact of the impact head 5. The second cavity 10b and the third cavity 10c are filled with hydraulic oil. A guide ring 1201 is slidably installed on the outer surface of the guide cylinder 12.

[0034] Two buffer energy storage components 1 are arranged in parallel and symmetrically, and the two outer cylinders 11 are fixed together by a connecting plate 1 2, and the tops of the two guide cylinders 12 are fixed together by a connecting plate 2 3; a connecting plate 3 4 is fixedly installed on the two guide rings 1201; an impact head 5 that penetrates the connecting plate 2 3 is fixedly provided on the upper side of the connecting plate 3 4; in this embodiment, by connecting the connecting plate 3 4 to the guide ring 1201 instead of directly connecting it to the telescopic cylinder 13, the impact force with an eccentric angle can be directly transmitted to the guide cylinder 12 instead of the telescopic cylinder 13, ensuring the smooth sliding action of the telescopic cylinder 13, and thus effectively ensuring the high stability of the entire impact buffer device.

[0035] To ensure the safe and leak-free operation of the telescopic cylinder 13 during the telescopic process, the top of the telescopic cylinder 13 always extends beyond the outer cylinder 11, preventing the telescopic cylinder 13 from not reaching its maximum stroke when the connecting plate 3 4 pushes it downward. In addition, the maximum extension length of the telescopic cylinder 13 is not less than the length difference between the guide cylinder 12 and the outer cylinder 11, preventing the telescopic cylinder 13 from sliding out of the outer cylinder 11. This design ensures that the telescopic cylinder 13 can always press against the bottom of the guide ring 1201 under the pressure inside the cavity 10a, and the extension amount of the telescopic cylinder 13 can be limited within a reasonable range by the connecting plate 2 3.

[0036] To further improve the stability of the entire impact buffer device, two connecting plates 2 are provided, one of which is fixedly installed between the tops of the two outer cylinders 11 to serve as a hard limit for the downward movement of the connecting plate 3 4. This design effectively limits the maximum pressure inside the cavity 1, avoiding the problem of leakage or damage to the buffer energy storage component due to excessive pressure.

[0037] To further improve the connection strength between the guide cylinder 12 and the outer cylinder 11 and ensure the long-term efficient operation of the buffer energy storage assembly 1, after the guide cylinder 12 and the outer cylinder 11 are fixedly installed, the bottom end of the guide cylinder 12 abuts against the inner bottom end of the outer cylinder 11, and the connection between cavity two 10b and cavity three 10c is achieved by opening a groove 1104 at the inner bottom end of the outer cylinder 11. Figure 10-12 As shown.

[0038] Working principle: When the impact head 5 is impacted, the impact head 5 drives the connecting plate 4 to slide downwards along the guide cylinders 12 of the two buffer energy storage components 1 through the two guide rings 1201. This, in turn, pushes the telescopic cylinder 13 to allow the hydraulic oil in cavity 10c to pass through the throttle valve 1103 and groove 1104 into cavity 10b, thereby pushing the piston 14 to compress cavity 10a. When the pressure in cavity 10a is balanced with that in cavity 10b and cavity 10c, the telescopic cylinder 13 stops sliding downwards, and the force on the impact head 5 is balanced. When the impact head no longer... When force is applied or the force decreases, the pressure in cavity 10a pushes piston 14 downward, and the hydraulic oil in cavity 10b enters cavity 10c quickly through groove 1104 and check valve 1102, thereby pushing impact head 5 to rebound quickly. In addition, during the process of connecting plate 4 sliding down guide cylinder 12 via two guide rings 1201, if the impact head 5 is subjected to excessive force, causing telescopic cylinder 13 to slide downward continuously, then connecting plate 2 located between the tops of the two outer cylinders 11 will complete the hard limit of connecting plate 4 after contacting it.

[0039] The above description is only a preferred embodiment of this practice, but the scope of protection of this embodiment is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this embodiment, based on the technical solution and the inventive concept of this embodiment, should be covered within the scope of protection of this embodiment.

Claims

1. An impact buffer device, characterized in that, It includes two buffer energy storage components (1), each of which includes an outer cylinder (11), a guide cylinder (12) whose bottom end is fixedly connected to the outer cylinder (11), a piston (14) slidably installed inside the guide cylinder (12), and a telescopic cylinder (13) slidably and sealed between the outer cylinder (11) and the guide cylinder (12); the guide cylinder (12) is longer than the outer cylinder (11) and the telescopic cylinder (13); the piston (14) divides the interior of the guide cylinder (12) into an upper cavity one (10a) and a lower cavity two (10b); the bottom of the telescopic cylinder (13) is connected to the outer cylinder (11) and the guide cylinder (12) in a telescopic seal. A cavity three (10c) is formed between the outer cylinder (11) and the guide cylinder (12); the cavity two (10b) and the cavity three (10c) are connected by at least two flow channels (1101), and a throttle valve (1103) is installed in at least one of the flow channels (1101), while a one-way valve (1102) with its outlet facing the cavity three (10c) is installed in the other flow channels (1101); the cavity one (10a) is filled with an inert gas at a certain pressure, and the cavities two (10b) and three (10c) are filled with hydraulic oil; a guide ring (1201) is slidably installed on the outer surface of the guide cylinder (12). The two buffer energy storage components (1) are arranged in parallel and symmetrically, and the two outer cylinders (11) are fixed together by connecting plate one (2), and the tops of the two guide cylinders (12) are fixed together by connecting plate two (3); connecting plate three (4) is fixedly installed on the two guide rings (1201); an impact head (5) that penetrates the connecting plate two (3) is fixedly provided on the upper side of the connecting plate three (4).

2. The impact buffer device according to claim 1, characterized in that: The top of the telescopic cylinder (13) always extends beyond the outer cylinder (11), and the maximum extension length is not less than the length difference between the guide cylinder (12) and the outer cylinder (11); the telescopic cylinder (13) always abuts against the bottom of the guide ring (1201) under the pressure inside the cavity (10a).

3. The impact buffer device according to claim 1, characterized in that: The gas pressure in the cavity (10a) changes from 0.1 to 1 MPa during the impact of the impact head (5).

4. The impact buffer device according to claim 2, characterized in that: At least two connecting plates (2) are provided, and one of them is fixedly installed between the tops of the two outer cylinders (11) to serve as a hard limit for the downward movement stroke of the connecting plate (4).

5. An impact buffer device according to claim 1, characterized in that: After the guide cylinder (12) and the outer cylinder (11) are fixedly installed, the bottom end of the guide cylinder (12) abuts against the inner bottom end of the outer cylinder (11), and the connection between cavity two (10b) and cavity three (10c) is achieved by opening a groove (1104) at the inner bottom end of the outer cylinder (11).

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