Built-in oil pressure supply structure of door closer
By designing a built-in oil pressure supply structure in the door closer and using a sealing plate to control the hydraulic oil flow rate, the problem of too fast speed when the door closer is closed is solved, and the door is stable, silent and safe closure is achieved.
Patent Information
- Application Number
- CN202422296065.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing door closer is too fast when the door body is closed, causing violent impacts, causing noise and affecting the safety of the device.
A built-in oil pressure supply structure for a door closer is designed. By setting a sealing plate and a flow port in the hydraulic support cylinder, the flow port is gradually closed by the sealing plate to control the flow rate of the hydraulic oil, thereby slowing down the automatic reset speed of the door.
Effectively prevent strong impacts during resetting, improve the stability and safety of door closure, reduce noise, and extend the service life of the device.
Smart Images
Figure CN223135917U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of door closers, in particular to an internal oil pressure supply structure of a door closer. Background Art
[0002] A door closer, full name modern hydraulic door closer, is a hydraulic device similar to a spring on the door head, installed on the top of the door leaf for automatic closing of the door.
[0003] The use of the door closer keeps the door in a closed state all the time, without the need for manual closing by people, which is convenient for improving the convenience of its use. However, when the existing device is used in cooperation with the door body, due to the too fast closing speed, it will produce a violent impact, which will not only generate a large noise, but also cause the loosening of the door frame under the long-term impact, affecting the safety of the device during long-term use.
[0004] Therefore, we provide an internal oil pressure supply structure of a door closer. Summary of the Utility Model
[0005] The purpose of the utility model is to provide an internal oil pressure supply structure of a door closer for the above-mentioned existing technical problems, so as to achieve the effect of automatically buffering the speed of the automatic closing of the door body.
[0006] In view of this, the utility model provides an internal oil pressure supply structure of a door closer, including a protective shell, and a moving frame installed inside the protective shell. One end of the moving frame is installed with a piston head, and a hydraulic support cylinder is arranged on one side of the piston head. The hydraulic support cylinder is slidably installed inside the hydraulic support cylinder. A plurality of circulation ports are opened on the inner wall of the hydraulic support cylinder, and the circulation ports penetrate to the outside of the hydraulic support cylinder. A hydraulic oil tank is installed at the upper end of the hydraulic support cylinder. The inside of the hydraulic support cylinder is communicated with the inside of the hydraulic oil tank through the circulation ports. A sealing plate is slidably connected between the hydraulic support cylinder and the hydraulic oil tank.
[0007] Preferably, the hydraulic oil tank is installed outside the protective shell, the hydraulic support cylinder is installed inside the protective shell, a moving groove is arranged between the hydraulic support cylinder and the hydraulic oil tank, and the sealing plate is slidably installed inside the moving groove.
[0008] Preferably, the moving groove is opened on the outside of the protective shell, and the moving groove is communicated with the circulation port.
[0009] Preferably, sealing strips are installed on opposite sides of the inner wall of the moving groove for moving and sealing the sealing plate.
[0010] Preferably, limiting strips are installed on both opposite sides of the sealing plate, and the limiting strips are used for moving and limiting the sealing plate.
[0011] Preferably, a connecting frame is installed at one end of the sealing plate, and the end of the connecting frame away from the sealing plate is installed on the outside of the moving frame.
[0012] Preferably, a rotating head is meshed and connected inside the moving frame, and a telescopic spring is installed at the end of the moving frame away from the piston head.
[0013] Compared with the prior art, the present utility model provides a built-in oil pressure supply structure of a door closer, having the following beneficial effects:
[0014] 1. In the present utility model, the sealing plate gradually seals a plurality of flow ports, facilitating gradually slowing down the moving speed of the door when it automatically resets, effectively preventing strong impact during reset, thereby automatically decelerating and controlling the closing of the door.
[0015] 2. In the present utility model, under the action of two sealing strips closely contacting the surface of the sealing plate, it is ensured that the hydraulic oil will not flow outward during circulation, ensuring the sealing performance of the hydraulic oil usage environment.
[0016] 3. In the present utility model, under the limitation of the limiting strip, the moving distance of the sealing plate is ensured to be reliable, thereby improving the stable and efficient use of the overall sealing plate.
[0017] Parts not involved in this device are the same as or can be implemented using the prior art. The structure of the present utility model is simple and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 is a schematic cross-sectional structure diagram of a built-in oil pressure supply structure of a door closer proposed by the present utility model;
[0019] Figure 2 is a schematic three-dimensional structure diagram of the right half of a built-in oil pressure supply structure of a door closer proposed by the present utility model;
[0020] Figure 3 is an enlarged schematic view of the structure at A of a built-in oil pressure supply structure of a door closer proposed by the present utility model;
[0021] Figure 4 is a schematic top view structure diagram of a built-in oil pressure supply structure of a door closer proposed by the present utility model;
[0022] Figure 5 is a schematic structure diagram of the sealing plate of a built-in oil pressure supply structure of a door closer proposed by the present utility model.
[0023] In the figure: 1. Protective housing; 2. Moving frame; 3. Piston head; 4. Hydraulic support cylinder; 5. Circulation port; 6. Moving groove; 7. Sealing strip; 8. Sealing plate; 9. Hydraulic oil tank; 10. Connecting frame; 11. Rotating head; 12. Telescopic spring; 13. Limiting strip. Detailed implementation manner
[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.
[0025] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.
[0026] Embodiment 1: An internal oil pressure supply structure of a door closer, as Figures 1 - 5As shown in the figure, it includes a protective shell 1 and a moving frame 2 installed inside the protective shell 1. One end of the moving frame 2 is installed with a piston head 3. One side of the piston head 3 is provided with a hydraulic support cylinder 4. The hydraulic support cylinder 4 is slidably installed inside the hydraulic support cylinder 4. The inner wall of the hydraulic support cylinder 4 is provided with a plurality of circulation ports 5. The circulation ports 5 penetrate to the outside of the hydraulic support cylinder 4. The upper end of the hydraulic support cylinder 4 is installed with a hydraulic oil tank 9. The inside of the hydraulic support cylinder 4 is communicated with the inside of the hydraulic oil tank 9 through the circulation ports 5. A sealing plate 8 is slidably connected between the hydraulic support cylinder 4 and the hydraulic oil tank 9. When the device operates, the moving frame 2 drives the piston head 3 to move outward of the hydraulic support cylinder 4, so that the sealing plate 8 moves in the same direction at the same time. When the sealing plate 8 moves, it gradually contacts and closes and isolates the circulation ports 5, so that the hydraulic oil inside the hydraulic oil tank 9 flows into the inside of the hydraulic support cylinder 4 under the circulation guidance of the circulation ports 5. When the door closes, the moving frame 2 drives the piston head 3 to move into the hydraulic support cylinder 4, so that the sealing plate 8 moves in the same direction at the same time. When the sealing plate 8 moves inward, it will gradually close the circulation ports 5. At the same time, the piston head 3 squeezes the hydraulic oil inside the hydraulic support cylinder 4 to flow into the hydraulic oil tank 9. With the continuous movement of the piston head 3 and the sealing plate 8, the number of circulation ports 5 supporting the flow of hydraulic oil gradually decreases, thereby gradually slowing down the flow rate of the hydraulic oil, achieving a gradual slowdown in the moving speed of the piston head 3. Until all the hydraulic oil inside the hydraulic support cylinder 4 flows into the hydraulic oil tank 9, the piston head 3 moves to the innermost side at the same time, and the door is completely closed at this time. Thus, through the setting of this oil pressure supply device, it is convenient to gradually slow down the moving speed when the door automatically resets, effectively preventing the situation of strong impact during reset, thereby automatically decelerating and controlling the closing of the door.
[0027] As Figures 1 - 5 shown, the hydraulic oil tank 9 is installed outside the protective shell 1, the hydraulic support cylinder 4 is installed inside the protective shell 1. A moving groove 6 is provided between the hydraulic support cylinder 4 and the hydraulic oil tank 9. The sealing plate 8 is slidably installed inside the moving groove 6. The moving groove 6 is opened on the outside of the protective shell 1. The moving groove 6 is communicated with the circulation ports 5. Under the guiding support and connection effect of the moving groove 6, it ensures the stability of the sealing plate 8 in the direction when moving, improves the direction accuracy when moving, and at the same time ensures its sealing effect, and can improve the connection of the flow of hydraulic oil, ensuring the correct direction when flowing from the circulation ports 5 into the hydraulic oil tank 9.
[0028] As Figures 1 - 5As shown in the figure, sealing strips 7 are installed on opposite inner walls of the moving groove 6. The sealing strips 7 are used for the moving seal of the sealing plate 8. Limit strips 13 are installed on opposite sides of the sealing plate 8. The limit strips 13 are used for the moving limit of the sealing plate 8. Under the action of the two sealing strips 7 in close contact with the surface of the sealing plate 8, it is ensured that the hydraulic oil will not flow outward during circulation, ensuring the sealing performance of the hydraulic oil use environment. And under the limit of the limit strips 13, the reliability of the moving distance of the sealing plate 8 is ensured, thereby improving the stable and efficient use of the sealing plate 8 as a whole.
[0029] Embodiment 2: An internal oil pressure supply structure of a door closer, as Figures 1 - 5 shown, a connecting frame 10 is installed at one end of the sealing plate 8. The end of the connecting frame 10 away from the sealing plate 8 is installed on the outside of the moving frame 2. Driven by the connecting frame 10, the sealing plate 8 can move along with the movement of the moving frame 2, thereby improving the stability and smoothness of the connection and movement of the device, and further ensuring the power support for the sealed movement of the sealing plate 8.
[0030] As Figures 1 - 5 shown, a rotating head 11 is engaged and connected inside the moving frame 2. A telescopic spring 12 is installed at the end of the moving frame 2 away from the piston head 3. Under the elastic support of the telescopic spring 12, the stability of the automatic reset of the device after movement is ensured, and by adjusting the compression of the length of the telescopic spring 12, the overall movement effect of the device is improved.
[0031] Working principle: When the door is opened, the moving frame 2 drives the piston head 3 to move outward of the hydraulic support cylinder 4, so that the sealing plate 8 moves in the same direction at the same time. While the sealing plate 8 moves, it gradually contacts and closes and isolates the communication port 5, so that the hydraulic oil inside the hydraulic oil tank 9 flows into the hydraulic support cylinder 4 under the flow guidance of the communication port 5. When the door is closed, the moving frame 2 drives the piston head 3 to move inside the hydraulic support cylinder 4, so that the sealing plate 8 moves in the same direction at the same time. When the sealing plate 8 moves inward, it will gradually close the communication port 5. At the same time, the piston head 3 squeezes the hydraulic oil inside the hydraulic support cylinder 4 to flow into the hydraulic oil tank 9. As the piston head 3 and the sealing plate 8 continue to move, the number of communication ports 5 supporting the flow of hydraulic oil gradually decreases, thereby gradually slowing down the flow rate of the hydraulic oil, achieving a gradual slowdown in the moving speed of the piston head 3. Until all the hydraulic oil inside the hydraulic support cylinder 4 flows into the hydraulic oil tank 9, the piston head 3 moves to the innermost side at the same time, and the door is completely closed at this time. Thus, through the setting of this oil pressure supply device, it is convenient to gradually slow down the moving speed of the door during automatic reset, effectively preventing strong impact during reset.
[0032] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.
Claims
1. An internal oil pressure supply structure of a door closer, comprising a protective housing (1) and a moving frame (2) installed inside the protective housing (1), characterized in that, One end of the moving frame (2) is installed with a piston head (3). One side of the piston head (3) is provided with a hydraulic support cylinder (4). The hydraulic support cylinder (4) is slidably installed inside the hydraulic support cylinder (4). A circulation port (5) is formed in the inner wall of the hydraulic support cylinder (4). There are several circulation ports (5), and the circulation ports (5) penetrate to the outside of the hydraulic support cylinder (4). A hydraulic oil tank (9) is installed at the upper end of the hydraulic support cylinder (4). The inside of the hydraulic support cylinder (4) is communicated with the inside of the hydraulic oil tank (9) through the circulation port (5). A sealing plate (8) is slidably connected between the hydraulic support cylinder (4) and the hydraulic oil tank (9).
2. The built-in oil pressure supply structure of a door closer according to claim 1, characterized in that, The hydraulic oil tank (9) is installed outside the protective housing (1). The hydraulic support cylinder (4) is installed inside the protective housing (1). A moving groove (6) is provided between the hydraulic support cylinder (4) and the hydraulic oil tank (9). The sealing plate (8) is slidably installed inside the moving groove (6).
3. The built-in oil pressure supply structure of a door closer according to claim 2, characterized in that, The moving groove (6) is formed on the outside of the protective housing (1). The moving groove (6) is communicated with the circulation port (5).
4. The built-in oil pressure supply structure of a door closer according to claim 2, characterized in that, Sealing strips (7) are installed on opposite sides of the inner wall of the moving groove (6). The sealing strips (7) are used for the moving seal of the sealing plate (8).
5. The built-in oil pressure supply structure of a door closer according to claim 1, characterized in that, Limit strips (13) are installed on both opposite sides of the sealing plate (8). The limit strips (13) are used for the moving limit of the sealing plate (8).
6. The built-in oil pressure supply structure of a door closer according to claim 1, characterized in that, One end of the sealing plate (8) is installed with a connecting frame (10). The end of the connecting frame (10) away from the sealing plate (8) is installed outside the moving frame (2).
7. The built-in oil pressure supply structure of a door closer according to claim 1, characterized in that A rotating head (11) is meshed and connected inside the moving frame (2). A telescopic spring (12) is installed at the end of the moving frame (2) away from the piston head (3).