A buffer
The buffer design, featuring an embedded snap-fit and a Y-shaped sealing ring pre-tightening structure, solves the problems of uneven buffering, easy oil leakage, and complex installation of traditional hydraulic buffers, achieving stable buffering and extended service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHAOQING LEIMI PRECISION HARDWARE CO LTD
- Filing Date
- 2025-06-26
- Publication Date
- 2026-07-14
AI Technical Summary
Traditional hydraulic dampers have unstable buffering effects, are prone to vibration or zero resistance, require professional tools for installation and disassembly, are prone to oil leakage in their sealing structure, have high tensile resistance, and the piston rod may rebound.
The front cover and rubber head are connected by an embedded snap-fit design. A Y-shaped sealing ring and spring preload structure are used, combined with a transparent gasket and gap piston to ensure sealing and uniform cushioning, simplifying the installation process.
It achieves uniform and stable buffering force, avoids vibration and zero resistance, extends service life, reduces maintenance costs, and improves the comfort and durability of furniture.
Smart Images
Figure CN224496177U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of hardware accessories technology, specifically relating to a buffer. Background Technology
[0002] In the furniture hardware industry, drawers, cabinet doors, and other moving parts are prone to noise and vibration during closing if there is no effective cushioning device. This not only affects the user experience but may also damage the parts and shorten the furniture's lifespan. As people's demands for furniture comfort and durability increase, dampers, as devices that effectively reduce the impact of closing, have been widely used in furniture accessories. Hydraulic dampers, with their stable cushioning effect and high adjustability, have become a common type of cushioning device on the market. They mainly achieve the purpose of cushioning by dissipating the kinetic energy during the closing process through the flow of damping oil between the piston and cylinder.
[0003] Traditional hydraulic dampers may exhibit uneven cushioning during closure, especially during certain stroke phases, which can lead to vibration or even zero resistance, resulting in an unsmooth closing action and impacting the user experience. The connection between the front cover and the rubber head of a traditional hydraulic damper is complex, typically requiring specialized tools for installation and removal. This increases installation costs and time, and also makes subsequent maintenance and replacement inconvenient. Furthermore, the sealing rings of traditional hydraulic dampers lack effective pre-tightening devices, making them prone to damping oil leakage over long-term use. This leads to decreased cushioning performance and a shortened lifespan for the damper.
[0004] In view of this, we propose a buffer to solve the above problems. Utility Model Content
[0005] The present invention aims to solve the technical problems of the above-mentioned prior art, such as the unstable buffering effect of traditional buffers, the tendency to vibrate or have zero resistance when closed, the need for professional tools for installation and disassembly, the tendency of the sealing structure to leak oil, the large tensile resistance and the possibility of piston rod rebound.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A buffer, comprising:
[0008] The cylinder barrel is fixed to the front cover by an embedded buckle. A transparent gasket is placed at the bottom of the inner side of the cylinder barrel as a basic support surface. A clearance piston that forms a precise sliding fit with the inner wall of the cylinder barrel is installed above the transparent gasket.
[0009] The piston rod has one end inserted into the cylinder and fixed to the center hole of the clearance piston by interference fit or welding, and the other end extends out of the front cover and is fixed to the rubber head by an embedded buckle; the rubber head is used to contact the object being cushioned (such as a drawer panel).
[0010] The Y-shaped sealing ring is fitted onto the piston rod and located between the flower and the front cover. The flower is installed inside the cylinder and located in front of the clearance piston.
[0011] The spring is connected at one end to the flower joint and at the other end to the front cover; the spring applies a preload to the Y-shaped sealing ring through the flower joint to ensure the sealing effect between the Y-shaped sealing ring and the piston rod.
[0012] Preferably, the Y-shaped sealing ring is installed with its lip facing upwards on the front side of the valve, with the inner lip tightly wrapping the piston rod and the outer lip making sealing contact with the inner wall of the cylinder. The valve is fitted onto the piston rod through its central hole; the spring is fitted onto the piston rod.
[0013] Preferably, a space for damping oil flow is formed between the clearance piston and the cylinder.
[0014] Preferably, the piston rod is inserted from the rear end of the transparent gasket, passes through the transparent gasket, the gap piston, the flower-shaped seal, the Y-shaped sealing ring and the spring in sequence, and the front end extends out of the front cover.
[0015] Preferably, the outer diameter of the transparent gasket is in close contact with the inner diameter of the cylinder, and the transparent gasket is used in combination with the gap piston to reduce tensile resistance.
[0016] Preferably, the embedded snap-fit on the rubber head adopts a barbed structure to ensure a firm connection with the cylinder and to withstand axial tension.
[0017] Preferably, the side of the cylinder has a pre-drilled oil injection hole for damping oil injection. The amount of damping oil injected is 80% to 90% of the internal volume of the cylinder. After the oil is injected, the oil injection hole is sealed with a sealing cap to ensure that the damping oil will not leak during operation.
[0018] Compared with the prior art, the technical effects and advantages of this utility model are:
[0019] This damper works by having the rubber head contact the object and move the piston rod into the cylinder when the drawer or other object is closed. The clearance piston then slides within the cylinder. At this time, the damping oil flows in the space between the clearance piston and the inner wall of the cylinder, generating damping force through compression. The viscous resistance of the damping oil dissipates the closing kinetic energy. A spring applies preload to the Y-shaped sealing ring through a perforated joint, ensuring a tight seal and preventing damping oil leakage. The combination of the transparent gasket and the clearance piston reduces tensile resistance. During closure, the cooperation of the damping oil, piston, and cylinder ensures a uniform damping force, preventing vibration and zero-resistance phenomena.
[0020] The embedded snap-fit design makes installing and removing the front cover and rubber head easier, requiring no complicated tools, thus improving installation efficiency and reducing maintenance costs. The Y-shaped sealing ring, combined with a spring and a flower-shaped insert, enhances sealing through pre-tightening, effectively preventing damping oil leakage and extending the damper's lifespan. The combination of a gap piston and a transparent gasket reduces tensile resistance while providing superior cushioning during closing compared to traditional dampers, offering stable cushioning force throughout the process, eliminating vibration and rebound, and ensuring smooth closing of drawers, cabinet doors, and other components.
[0021] This damper, through the coordinated action of its components, provides stable cushioning when drawers, cabinet doors, and other furniture parts are closed, preventing noise and damage caused by impacts and improving the comfort and durability of the furniture. Its structural design balances ease of installation, reliable sealing, and efficient cushioning, making it suitable for various furniture applications and providing a practical solution for optimizing the performance of furniture hardware. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the structure of this utility model.
[0023] In the diagram: 1. Cylinder; 2. Transparent gasket; 3. Clearance piston; 4. Flower joint; 5. Y-shaped seal ring; 6. Spring; 7. Front cover; 8. Piston rod; 9. Rubber head; 10. Oil injection hole. Detailed Implementation
[0024] 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.
[0025] The following combination Figure 1 This application will be described in further detail.
[0026] This application discloses a damper, including a cylinder 1, a piston rod 8, a front cover 7, a rubber head 9, and damping oil. The cylinder 1 is a hollow cylindrical cavity with an oil injection hole 10 on the side. The oil injection volume is 80% to 90% of the internal volume of the cylinder 1. After oil injection, it is sealed by a sealing cover.
[0027] A transparent gasket 2 is fitted to the bottom inner side of cylinder 1, with its outer diameter closely matching the inner diameter of cylinder 1, serving as a basic support surface. Above the transparent gasket 2, a gap piston 3 is provided, forming a precise sliding fit with the inner wall of cylinder 1, creating a space for damping oil flow between the two.
[0028] One end of the piston rod 8 is inserted into the cylinder 1 and is fixed to the center hole of the clearance piston 3 by interference fit or welding; the other end passes through the front cover 7 and is fixed to the rubber head 9 by embedded fastening. The rubber head 9 is used to contact the object being buffered (such as the drawer panel).
[0029] The piston rod 8 is fitted with a Y-shaped sealing ring 5, a flower-shaped sealing ring 4, and a spring 6. The lip of the Y-shaped sealing ring 5 faces upward, with its inner lip tightly wrapping around the piston rod 8 and its outer lip sealingly contacting the inner wall of the cylinder 1. It is located in front of the flower-shaped sealing ring 4. The flower-shaped sealing ring 4 is fitted onto the piston rod 8, installed inside the cylinder 1, and located on the side of the clearance piston 3 near the front cover 7.
[0030] Spring 6 is fitted onto piston rod 8, with one end connected to flower joint 4 and the other end connected to front cover 7. Flower joint 4 applies pre-tightening force to Y-shaped sealing ring 5 to enhance sealing effect.
[0031] Both the front cover 7 and the rubber head 9 adopt an embedded snap-fit design (such as a barbed hook structure). The front cover 7 is snapped onto the front end of the cylinder 1, and the rubber head 9 is snapped onto the front end of the piston rod 8, ensuring a firm connection and easy disassembly and assembly.
[0032] The combination of the gap piston 3 and the transparent gasket 2 can reduce the tensile resistance of the buffer. At the same time, during the closing process, the damping oil, the piston and cylinder 1 work together to achieve a buffering effect that is better than that of traditional buffers, avoiding vibration and zero resistance.
[0033] The embedded snap-fit design simplifies the installation process of the front cover 7 and the rubber head 9, allowing assembly to be completed without complicated tools. The Y-shaped sealing ring 5, in conjunction with the spring 6 for pre-tightening, effectively prevents damping oil leakage and extends the service life of the damper. The combination of the gap piston 3 and the damping oil provides stable cushioning force throughout the closing process, eliminating vibration and rebound, making it suitable for various scenarios such as drawers and cabinet doors.
[0034] During assembly, first place the transparent gasket 2 at the bottom of the cylinder 1, then install the gap piston 3, the flower-shaped seal 4, the Y-shaped sealing ring 5, and the spring 6 in sequence. Fix one end of the piston rod 8 to the gap piston 3, and pass the other end through the front cover 7 and fasten it to the rubber head 9. Inject damping oil into the cylinder 1 through the oil injection hole 10 to 80% to 90% of the volume, and seal the oil injection hole 10 to complete the assembly. In use, when the object being buffered (such as a drawer) is closed, the piston rod 8 drives the gap piston 3 to move into the cylinder 1. The damping oil flows through the gap between the gap piston 3 and the cylinder 1, generating resistance and achieving a buffering effect.
[0035] When the object being buffered (such as a drawer) is closed, the rubber head 9 is squeezed, causing the piston rod 8 to move into the cylinder 1. The gap piston 3 slides accordingly, and the damping oil flows in the space between the gap piston 3 and the inner wall of the cylinder 1. The viscous resistance consumes the closing kinetic energy, forming a buffering force. The spring 6 applies a preload to the Y-shaped sealing ring through the flower-shaped interface 4 to ensure a seal and prevent oil leakage. The combination of the transparent gasket 2 and the gap piston 3 reduces tensile resistance, making the cooperation between the damping oil, piston, and cylinder 1 continuously stable during the closing process, avoiding vibration and zero resistance phenomena.
[0036] The embedded snap-fit design makes it easy to install and remove the front cover 7 and the rubber head 9 without tools, improving assembly efficiency and reducing maintenance costs. The Y-shaped sealing ring combined with the spring 6 pre-tightening structure enhances sealing performance, effectively preventing damping oil leakage and extending the service life of the damper. The combination of the gap piston 3 and the transparent gasket 2 reduces tensile resistance while providing a better overall closing cushioning effect than traditional products, eliminating vibration and rebound. It is suitable for various scenarios such as drawers and cabinet doors, ensuring smooth and durable closing of furniture components.
[0037] 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 buffer, characterized in that, include: Cylinder (1), the front end of cylinder (1) is fixed to front cover (7) by embedded buckle, a transparent gasket (2) is placed on the bottom of the inner side of cylinder (1) as a basic support surface, and a gap piston (3) that forms a precise sliding fit with the inner wall of cylinder (1) is installed above the transparent gasket (2). The piston rod (8) has one end inserted into the cylinder (1) and is press-fitted or welded to the center hole of the clearance piston (3), and the other end extends out of the front cover (7) and is fixed to the rubber head (9) by an embedded buckle; the rubber head (9) is used to contact the object being buffered; Y-shaped sealing ring (5) is fitted on piston rod (8) and located between flower plate (4) and front cover (7). Flower plate (4) is installed in cylinder (1) and located in front of gap piston (3). The spring (6) is connected at one end to the flower joint (4) and at the other end to the front cover (7). The spring (6) applies a preload force to the Y-shaped sealing ring (5) through the flower joint (4) to ensure the sealing effect between the Y-shaped sealing ring (5) and the piston rod (8).
2. A buffer according to claim 1, characterized in that: The Y-shaped sealing ring (5) is installed on the front side of the flower-shaped sealing ring (4) with its lip facing upward. The inner lip tightly wraps around the piston rod (8), and the outer lip is in sealing contact with the inner wall of the cylinder (1). The flower-shaped sealing ring (4) is fitted onto the piston rod (8) through its central hole; the spring (6) is fitted onto the piston rod (8).
3. A buffer according to claim 1, characterized in that: A space for damping oil flow is formed between the gap piston (3) and the cylinder (1).
4. A buffer according to claim 1, characterized in that: The piston rod (8) is inserted from the rear end of the transparent gasket (2), passes through the transparent gasket (2), the gap piston (3), the flower plate (4), the Y-shaped sealing ring (5) and the spring (6) in sequence, and the front end extends out of the front cover (7).
5. A buffer according to claim 1, characterized in that: The outer diameter of the transparent gasket (2) fits tightly against the inner diameter of the cylinder (1).
6. A buffer according to claim 1, characterized in that: The embedded buckle on the rubber head (9) adopts a barbed structure.
7. A buffer according to claim 1, characterized in that: The side of the cylinder (1) is reserved with an oil injection hole (10) for the injection of damping oil.