A two-way buffer device for hydraulic cylinders

Abstract

This utility model relates to the field of hydraulic cylinder technology and discloses a bidirectional buffer device for a hydraulic cylinder, including a cylinder barrel with a front chamber oil port and a rear chamber oil port. A guide sleeve is fitted inside the cylinder barrel, and a piston rod is fitted inside the guide sleeve. A piston is fitted onto the head of the piston rod. A front chamber guide hole and a rear chamber guide hole are symmetrically formed on the left and right ends of the outer surface of the piston. A front chamber buffer through hole communicating with the front chamber guide hole and a rear chamber buffer through hole communicating with the rear chamber guide hole are symmetrically formed on the left and right sides of the piston. A front chamber buffer element is installed in the front chamber buffer through hole, and a rear chamber buffer element is installed in the rear chamber buffer through hole. This bidirectional buffer device for a hydraulic cylinder achieves innovative bidirectional buffering through the symmetrically arranged front and rear chamber buffer elements on both sides of the piston, solving the technical problem of the limitation of the buffering performance of existing hydraulic cylinders.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a bidirectional buffer device for hydraulic cylinders. Background Technology

[0002] In the field of metal processing equipment or metal scrap compression equipment, with the increasing demands for production efficiency, the operating frequency of hydraulic cylinders has increased from the traditional 15-20 times / minute to 35-40 times / minute, which has drastically amplified the shortcomings of traditional buffering technologies. As a key component for reciprocating motion impact mitigation, the bidirectional buffer cylinder has undergone three stages of technological development: initially using mechanical stop buffering, then developing fixed throttling buffering, and currently evolving towards adjustable intelligent buffering. However, existing technologies still struggle to balance buffering effectiveness with structural compactness, becoming a significant bottleneck restricting equipment performance improvement.

[0003] In existing technologies, the cushioning performance of hydraulic cylinders directly affects the operational stability and service life of heavy equipment. Currently, most metal processing equipment uses a single-sided cushioning structure. When the piston reaches the end of its stroke, it can only achieve unidirectional deceleration through a fixed throttling orifice. This design has significant limitations: firstly, it cannot adapt to bidirectional load conditions, such as the reciprocating compression motion of a briquetting machine; secondly, at high speeds exceeding 0.5 m / s, the fixed throttling method is prone to hydraulic shock, leading to sealing system failure. Statistics show that this type of problem accounts for more than 40% of hydraulic system failures, forcing companies to frequently replace core components such as piston rods and seals, with annual maintenance costs for a single piece of equipment exceeding ten thousand yuan. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this utility model provides a bidirectional buffer device for hydraulic cylinders. It achieves innovative bidirectional buffering by using front and rear chamber buffers symmetrically arranged on both sides of the piston, thus solving the technical problem of limited buffering performance of hydraulic cylinders in existing technologies.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a bidirectional buffer device for a hydraulic cylinder, comprising a cylinder barrel, wherein a front chamber oil port and a rear chamber oil port are provided on the cylinder barrel, a guide sleeve is fitted inside the cylinder barrel, a piston rod is fitted inside the guide sleeve, a piston is fitted at the head of the piston rod, a front chamber guide hole and a rear chamber guide hole are symmetrically provided on the left and right ends of the outer surface of the piston, a front chamber buffer through hole communicating with the front chamber guide hole and a rear chamber buffer through hole communicating with the rear chamber guide hole are symmetrically provided on the left and right sides of the piston, a front chamber buffer component is installed in the front chamber buffer through hole, and a rear chamber buffer component is installed in the rear chamber buffer through hole.

[0008] Furthermore, a seal is installed between the piston groove on the outer surface of the piston and the inner surface of the cylinder.

[0009] Furthermore, the front cavity buffer is a cylinder, and its interior is machined from left to right with interconnected front cavity oil inlet hole, front cavity connecting hole and front cavity horn-shaped oil outlet hole; the front cavity horn-shaped oil outlet hole is connected to the front cavity guide hole.

[0010] Furthermore, the rear cavity buffer is a cylinder, and its interior is machined from right to left with interconnected rear cavity oil inlet, rear cavity connecting hole and rear cavity horn-shaped oil outlet; the rear cavity horn-shaped oil outlet is connected to the rear cavity guide hole.

[0011] Furthermore, when the piston moves to the front chamber position, the front chamber guide hole communicates with the front chamber oil port; when the piston moves to the rear chamber position, the rear chamber guide hole communicates with the rear chamber oil port.

[0012] Furthermore, the front cavity buffer and the rear cavity buffer can be replaced with different specifications according to the buffering requirements of different working conditions.

[0013] (III) Beneficial Effects

[0014] Compared with the prior art, this utility model provides a bidirectional buffer device for hydraulic cylinders, which has the following features:

[0015] Beneficial effects:

[0016] This hydraulic cylinder's bidirectional buffer device achieves innovative bidirectional buffering through symmetrically arranged front and rear chamber buffer components on both sides of the piston. The gradually throttling structure of the front and rear flared oil outlets generates nonlinear damping force, effectively eliminating over 90% of end-impact compared to traditional fixed-orifice designs, while simultaneously improving buffering efficiency by 35%. Furthermore, the design of the front and rear buffer components allows for the replacement of different specifications according to load conditions, making the same cylinder adaptable to a wide range of pressures, from precision machine tools to engineering machinery.

[0017] Structurally, the linkage design of the front and rear guide holes on the piston with the corresponding front and rear buffer through holes 9 and 9, respectively, combined with the double sealing of the sealing element, ensures buffering performance while maximizing axial space utilization, resulting in a more compact structure. In practical applications, this device is particularly suitable for working conditions requiring frequent reversals, such as the compression and propulsion mechanism of a metal baler, saving maintenance time and costs and significantly reducing operating costs. Attached Figure Description

[0018] Figure 1 This is a front sectional view of a bidirectional buffer device for a hydraulic cylinder according to the present invention;

[0019] Figure 2 This utility model relates to a bidirectional buffer device for hydraulic cylinders;

[0020] Figure 3 This utility model relates to a bidirectional buffer device for hydraulic cylinders;

[0021] In the diagram: 1. Cylinder; 2. Front chamber oil port; 3. Rear chamber oil port; 4. Guide sleeve; 5. Piston rod; 6. Piston; 7. Front chamber guide hole; 8. Rear chamber guide hole; 9. Front chamber buffer through hole; 10. Rear chamber buffer through hole; 11. Front chamber buffer component; 1101. Front chamber oil inlet; 1102. Front chamber connecting hole; 1103. Front chamber flared oil outlet; 12. Rear chamber buffer component; 1201. Rear chamber oil inlet; 1202. Rear chamber connecting hole; 1203. Rear chamber flared oil outlet; 13. Seal; 14. Front chamber space; 15. Rear chamber space. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-3 A bidirectional buffer device for a hydraulic cylinder includes a cylinder 1 with a front cavity oil port 2 and a rear cavity oil port 3. A guide sleeve 4 is fitted inside the cylinder 1, and a piston rod 5 is fitted inside the guide sleeve 4. A piston 6 is fitted onto the head of the piston rod 5. A front cavity guide hole 7 and a rear cavity guide hole 8 are symmetrically opened on the left and right ends of the outer surface of the piston 6. A front cavity buffer through hole 9 communicating with the front cavity guide hole 7 and a rear cavity buffer through hole 10 communicating with the rear cavity guide hole 8 are symmetrically opened on the left and right sides of the piston 6. A front cavity buffer component 11 is installed in the front cavity buffer through hole 9, and a rear cavity buffer component 12 is installed in the rear cavity buffer through hole 10. A sealing component 13 is installed between the piston groove on the outer surface of the piston 6 and the inner surface of the cylinder 1.

[0024] In the above embodiments, the front chamber buffer 11 is a cylinder, and its interior, from left to right, is sequentially machined with a front chamber oil inlet 1101, a front chamber connecting hole 1102, and a front chamber flared oil outlet 1103, which are interconnected; the front chamber flared oil outlet 1103 is connected to the front chamber guide hole 7. The rear chamber buffer 12 is a cylinder, and its interior, from right to left, is sequentially machined with a rear chamber oil inlet 1201, a rear chamber connecting hole 1202, and a rear chamber flared oil outlet 1203, which are interconnected; the rear chamber flared oil outlet 1203 is connected to the rear chamber guide hole 8. When the piston 6 moves to the front chamber position, the front chamber guide hole 7 is connected to the front chamber oil port 2; when the piston 6 moves to the rear chamber position, the rear chamber guide hole 8 is connected to the rear chamber oil port 3. The front chamber buffer 11 and the rear chamber buffer 12 can be replaced with different specifications according to the buffering requirements of different working conditions.

[0025] The working principle of the above embodiments is as follows:

[0026] The device achieves bidirectional buffering through the front chamber buffer 11 and the rear chamber buffer 12 symmetrically arranged on both sides of the piston 6. In use, the piston rod 5 drives the piston 6 to reciprocate back and forth in the cylinder 1. The piston 6 moves forward to form the front chamber space 14. When the piston 6 moves to the end of the first stroke, the front chamber guide hole 7 connects with the front chamber oil port 2. The oil in the front chamber space 14 is compressed and discharged sequentially from the front chamber oil inlet hole 1101, the front chamber connecting hole 1102, and the front chamber trumpet-shaped oil outlet hole 1103 of the front chamber buffer 11 into the front chamber guide hole 7, and then pushed out from the front chamber oil port 2. When the piston 6 moves backward, as the front chamber guide hole 7 gradually moves away from the front chamber oil port 2, the oil can flow back into the front chamber space through the above-mentioned flow path.

[0027] The piston 6 moves backward to form a rear cavity space 15. When the piston 6 moves to the end of the rear stroke, the rear cavity guide hole 8 is connected to the rear cavity oil port 3. The oil in the rear cavity space 15 is compressed and discharged into the rear cavity guide hole 8 in sequence from the rear cavity oil inlet hole 1201, the rear cavity connecting hole 1202, and the rear cavity horn-shaped oil outlet hole 1203 of the rear cavity buffer 12. Then it is pushed out from the rear cavity oil port 3. When the piston 6 moves forward again, as the rear cavity guide hole 8 gradually moves away from the rear cavity oil port 3, the oil can flow back into the rear cavity space through the above-mentioned flow path.

[0028] In summary, the reciprocating motion of piston 6 within cylinder 1 achieves bidirectional buffering of the front and rear chamber spaces.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A double-acting buffer device for a hydraulic cylinder, comprising a cylinder barrel (1) having a front-chamber oil port (2) and a rear-chamber oil port (3) formed therein, characterized in that: A guide sleeve (4) is fitted inside the cylinder (1), and a piston rod (5) is fitted inside the guide sleeve (4). A piston (6) is fitted at the head of the piston rod (5). A front cavity guide hole (7) and a rear cavity guide hole (8) are symmetrically opened on the left and right ends of the outer surface of the piston (6). A front cavity buffer through hole (9) communicating with the front cavity guide hole (7) and a rear cavity buffer through hole (10) communicating with the rear cavity guide hole (8) are symmetrically opened on the left and right sides of the piston (6). A front cavity buffer component (11) is installed in the front cavity buffer through hole (9), and a rear cavity buffer component (12) is installed in the rear cavity buffer through hole (10).

2. The double-direction buffer device for oil cylinder according to claim 1, wherein: A seal (13) is installed between the piston groove on the outer surface of the piston (6) and the inner surface of the cylinder (1).

3. The double-direction buffer device for oil cylinder according to claim 1, characterized in that: The front cavity buffer (11) is a cylinder, and its interior is machined from left to right with a front cavity oil inlet hole (1101), a front cavity connecting hole (1102) and a front cavity horn-shaped oil outlet hole (1103) that are interconnected; the front cavity horn-shaped oil outlet hole (1103) is connected to the front cavity guide hole (7).

4. The double-direction buffer device for oil cylinder according to claim 1, wherein: The rear cavity buffer (12) is a cylinder, and its interior is machined from right to left with interconnected rear cavity oil inlet hole (1201), rear cavity connecting hole (1202) and rear cavity horn-shaped oil outlet hole (1203); the rear cavity horn-shaped oil outlet hole (1203) is connected to the rear cavity guide hole (8).

5. The hydraulic cylinder bidirectional buffer device according to claim 1, characterized in that: When the piston (6) moves to the front cavity space position, the front cavity guide hole (7) is connected to the front cavity oil port (2). When the piston (6) moves to the rear cavity space position, the rear cavity guide hole (8) is connected to the rear cavity oil port (3).

6. The double-direction buffer device for oil cylinder according to claim 2, characterized in that: The front cavity buffer (11) and the rear cavity buffer (12) can be replaced with different specifications according to the buffering requirements of different working conditions.

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